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| operations manual lc640.480.21-065 h igh p erformance 6.5" c olor tft amlcd the definition of quality ?
copyright ? 2000 by planar systems, inc. planar and the definition of quality are registered trademarks. colorbrite is a trademark of planar systems, inc. this document is subject to change without notice. planar provides this information as reference only and does not imply any recommendation or endorsement of other vendor?s products. revision control date description september 2000 document number om610-00 lc640.480.21-065 operations manual (om610-00) i contents lc640.480.21-065 display ........................................................................................................ ..... 1 features and benefits............................................................................................................ ....... 1 installation and handling........................................................................................................ ......... 2 mounting the display ............................................................................................................. ..... 2 mounting display face down................................................................................................. 2 mounting display face up ..................................................................................................... 2 thermal control ................................................................................................................. ..... 2 isolation and air gap............................................................................................................. .2 ambient light sensor clearance............................................................................................. 3 cable length.................................................................................................................... ............ 3 cleaning....................................................................................................................... ................ 3 avoiding image retention......................................................................................................... .. 3 specifications ................................................................................................................. ................. 4 environmental characteristics................................................................................................... .. 4 safety and emi certifications ................................................................................................. 4 reliability and backlight life.................................................................................................. 4 mechanical characteristics...................................................................................................... .... 5 optical characteristics......................................................................................................... ........ 6 viewing angles .................................................................................................................. ...... 7 response times .................................................................................................................. ..... 7 interfacing and operation........................................................................................................ ........ 8 control basics.................................................................................................................. ............ 8 power requirements.............................................................................................................. .. 8 power sequencing (lcd)........................................................................................................ 9 video signals................................................................................................................... ............ 9 video signal characteristics................................................................................................... 9 signal timing................................................................................................................... ...... 10 video characteristics........................................................................................................... ...... 14 pixel position.................................................................................................................. ....... 15 warmup characteristic ......................................................................................................... 16 connectors ..................................................................................................................... ............ 17 video input and backlight control connector (j1) .............................................................. 17 backlight inverter and heater connector (j2) ..................................................................... 19 ambient light sensor (tethered option) (j3) ....................................................................... 19 luminance features.............................................................................................................. ......... 20 backlight dimming............................................................................................................... ..... 20 manual dimming.................................................................................................................. .20 automatic dimming (ambient light sensor) ........................................................................ 22 automatic dimming (manual offset) .................................................................................... 23 controlled luminance mode................................................................................................. 23 backlight enable................................................................................................................ ........ 24 lc640.480.21-065 operations manual (om610-00) ii temperature considerations...................................................................................................... 24 luminance variation due to ambient temperature ............................................................. 24 temperature sensors ............................................................................................................. 25 heater operation and over heat status lines ..................................................................... 25 backlight heater................................................................................................................ .... 25 cell heater ..................................................................................................................... ....... 28 high temperature control .................................................................................................... 30 defects ........................................................................................................................ ................... 31 emissive defects ................................................................................................................ ....... 31 cosmetic defects ................................................................................................................ ....... 32 display dimensions.............................................................................................................. ......... 33 figures figure 1. viewing angles.......................................................................................................... .. 7 figure 2. response times.......................................................................................................... .. 7 figure 3. power sequencing. ....................................................................................................... 9 figure 4. timing diagram. ........................................................................................................ 1 1 figure 5. timing diagram. ........................................................................................................ 1 2 figure 6. timing diagram. ........................................................................................................ 1 3 figure 7. pixel position of input data. ...................................................................................... 15 figure 8. warmup curve. .......................................................................................................... 1 6 figure 9. connector locations. ................................................................................................. 17 figure 10. dimming voltage input on j1 (dim)....................................................................... 20 figure 11. luminance vs. dimming voltage: manual dimming. ............................................. 21 figure 12. luminance levels: automatic dimming (ambient light sensor).......................... 22 figure 13. luminance levels: automatic dimming (manual offset). ..................................... 23 figure 14. backlight power consumption................................................................................. 24 figure 15. sensor temperature vs. lamp heater (inverter startup time delay) ..................... 26 figure 16. sensor temperature vs. lamp heater duty cycle................................................... 27 figure 17. display warmup performance. ................................................................................ 27 figure 18. cell heater response time performance. ............................................................... 28 figure 19. cell heater maximum power time. ........................................................................ 29 figure 20. cell heater duty cycle. ........................................................................................... 29 figure 21. temperature control: maximum pulse width modulation duty cycle.................. 30 figure 22. diameter calculation................................................................................................ 32 figure 23. display dimensions. ................................................................................................ 33 lc640.480.21-065 operations manual (om610-00) 1 lc640.480.21-065 display the lc640.480.21-065 is a 6.5-inch diagonal vga active matrix liquid crystal display (amlcd) designed to meet the demanding sae specifications for the transportation industry. this display is ideal for a variety of industrial applications, such as point-of- sale and outdoor kiosks. with a typical brightness of 1000 nits, this sunlight-readable display offers high contrast in bright environments along with a wide dimming range for nighttime operation. with its modular design, this display is perfect for mobile computing and rugged applications where a high-performance embedded display is required. amlcd panel: the panel is a color active matrix lcd module incorporating amorphous silicon tft (thin film transistor) technology with wide viewing angle characteristics. the video interface is digital, 6-bits per color, which allows up to 262,144 different colors. backlight module: the backlight assembly contains six high-efficiency cold cathode fluorescent lamps (ccfl), temperature sensors, and lamp heaters. all the components are mounted to a single circuit board. the ccfls are heated at low temperatures to increase their luminance and extend their life. located in front of the backlight module are several diffusing and brightness-enhancement films. inverter module: this assembly contains the backlight inverter electronics, microprocessor, heater control circuitry, and input/output connectors. all the components are mounted to a single circuit board. the microprocessor controls the inverter, heater, and dimming functions. the dimming functions include manual analog and automatic control based upon ambient light. ambient light sensor: the ambient light sensor can remain attached to the display or mounted remotely using a cable. video interface: standard vga tft interface is digital 6-bit rgb. features and benefits ? 1000 cd/m 2 typical luminance for sunlight-readability ? 3:1 contrast @ 100k lux ambient for outdoor daylight use ? wide +35/-45 vertical / 50 horizontal viewing angle ? 300:1 digital dimming for efficient control over a wide range of ambient light ? 18-bit (6 bits per color) video interface for wide color range (262,144 colors) ? 30,000 hours mtbf for long service-free operating life ? durable and lightweight for rugged conditions ? convection cooling for operation without cooling fans ? modular design for easy field replacement of backlight and inverter ? automatic thermal management at low and high temperature extremes lc640.480.21-065 operations manual (om610-00) 2 installation and handling do not drop, bend, or flex the display. do not allow objects to strike the surface of the display. mounting the display to maximize shock and vibration performance, the display must be properly mounted using all four mounting hole locations. there are two recommended mounting configurations. appropriate changes to these mounting configurations may be needed to meet specific requirements or applications. table 1 below lists the recommended mounting hardware. table 1. mounting hardware. screw m2.5 ss phillips-head or #4 ss phillips-head washer lockwasher, split type tightening torque 4oz-in \ 2.8x10 5 dyne ? cm mounting display face down standoff spacers or bosses with a minimum height of 3.0 mm must be used at all four mounting locations to prevent binding and deflection of the display. mounting display face up standoff spacers or bosses with a minimum height of 33.0 mm must be used at all four mounting locations to prevent binding and deflection of the display. thermal control several thermal sensors located on the backlight module allow the display to operate safely at temperature extremes. at low ambient temperatures, heaters on the backlight module warm the lamps to a safe temperature before energizing the lamps. this cold- start routine extends the life of the lamps and increases the luminance at low temperatures. during the warm up period, pin 39 on the input connector is set low. at high ambient temperatures, the luminance will gradually be reduced to maintain acceptable temperatures on the inverter module. if the temperatures remain above the acceptable level after the luminance has been totally reduced, then the inverter will shut down. during the luminance reduction period, pin 40 on the input connector (j1) is set to low. isolation and air gap the display generates high voltage ac to drive the ccfl tubes. high voltage is present at numerous points on the backlight and inverter module that forms the rear surface of the display, so your application should not place metal too near the module. in the interests of both high voltage isolation and airflow for cooling, it is recommended that an air gap of .197" (5 mm) or greater be maintained behind the display. lc640.480.21-065 operations manual (om610-00) 3 ambient light sensor clearance two backlight dimming modes utilize automatic brightness control. if the display is to be operated in either of these modes, the ambient light sensor located on the front bezel must be unobstructed. if the sensor is placed behind the same protective window as the display active (viewing) area, the sensor operation may be affected due to light scattering and reflections from display-generated light coupling to the sensor via the window. cable length due to the high frequencies present on the video interface, unterminated video cable lengths of more than 12 inches (300 mm) are discouraged. cleaning care should be taken to minimize scratching. clean the display front with a dry, soft cloth such as a professional photographic lens cleaner. disposable cleaning cloths are recommended to minimize the risk of inadvertently scratching the display with particles embedded in a re-used cloth. particular care should be taken when cleaning displays with polarizers or anti-glare and anti-reflective films. these films may delaminate if exposed to certain chemicals. avoiding image retention image retention may occur when a fixed pattern is displayed for a long time. use a screen saver or image inversion to avoid image retention on the display. lc640.480.21-065 operations manual (om610-00) 4 specifications performance characteristics are guaranteed with the display at room temperature (25 c) and with the operating voltage within specifications, unless otherwise specified. optical performance is referenced to screen center at normal incidence with a full white screen display and the backlight at maximum luminance, 60hz lcd frame rate, unless otherwise specified. environmental characteristics table 2. environmental characteristics. temperature operating operating survival storage -20 to +71 c (-40 to +71c with cell heater/version -01) -40to+85c,2hrs.maximum -45to+90c,24hrs.maximum humidity operating non-operating 93% rh @ 40 c, non-condensing, 10 days per iec 68-2-3 0 to 95% rh @ 25-55 oc, 6 days per iec 68-2-30 altitude operating non-operating 0 to 10k ft. per iec 68-2-13 0 to 40k ft. per iec 68-2-13 vibration (random) operating/non-operating 0.02 g 2 /hz, 5-500 hz, 30 min. ea. axis, per iec 68-2-34 specific profiles for each axis, sae j1455, section 4.9 shock operating/non-operating 100 g, 6 ms, half sine wave, 3 shocks per surface, per iec 68-2-27 safety and emi certifications the display will not inhibit the end product from compliance with ul1950, csa22.2, and iec950. when housed in a suitable enclosure, the display will not inhibit the end product from complying with fcc part 15, subpart j class b, en55022 class b, or sae-j-1113. reliability and backlight life the demonstrated system mtbf is to be greater than 30,000 hours with a 90% confidence level at 25 c. refer to table 3 for backlight life. table 3. backlight life. usage backlight life (typical to 50% of initial luminance) continuous at full luminance 20k hours continuous at half luminance 60k hours typical use using cbm* 50k hours @ 700 cd/m 2 * controlled luminance mode lc640.480.21-065 operations manual (om610-00) 5 mechanical characteristics refer to mechanical outline drawing in figure 23 on page 33. all size measurements shown in table 3 are in millimeters (inches). table 4. mechanical characteristics. display external dimensions width height depth 178.8 (7.04 ) nominal 126.8 (4.99) nominal 38.3 (1.51) nominal weight (normal) 470 g (1.05 lbs.) display active area width height diagonal 132.48 (5.22) nominal 99.36 (3.91) nominal 165.10 (6.5) pixel pitch width height .207 (0.008) nominal .207 (0.008) nominal lc640.480.21-065 operations manual (om610-00) 6 optical characteristics table 5. optical characteristics. luminance (at screen center) standard (typical) 1 controlled (typical) 3cd/m 2 minimum, 1000 cd/m 2 maximum (initial) 3cd/m 2 minimum, 700 cd/m 2 maximum contrast ratio dark room ambient 500 lux ambient 5k lux ambient 20k lux ambient 150: 1 typical, 80:1 minimum 92:1 typical 12:1 typical 4:1 typical color coordinates white field x = .362 typical; y = .370 typical luminance non-uniformity 25% maximum with a white screen, max difference between any 2 of 5 points is defined as follows: lnu (%) = (1- (lmin/lmax)) x 100% luminance control (typical) ) dimming range 50:1 initial, 300:1 stabilized (lmax after > 15 minutes at max. lum., then lmin at min. lum; dimming range = lmax/lmin) ambient light sensor response field of view dynamic range visible light filtered ~420 to 675nm @ 50% pts. 50 degrees typical to half sensitivity 0 to 3000 lux typ.; assumes 18% scene reflectance viewing angles horizontal vertical 50 degrees typ., white/black cr 10 +35/-45 degrees typ., white/black cr 10 (see figure 1) 1 the contrast brightness mode regulates backlight luminance via feedback over the life of the lamps. the lamp and luminance life will vary depending on the chosen controlled luminance level. for more information, see ?backlight dimming? on page 20. lc640.480.21-065 operations manual (om610-00) 7 viewing angles figure 1. viewing angles. - v - h + v + h normal line 6o?clockdirection where: +h +horizontal angle (+50) -h -horizontal angle (-50) +v +vertical angle (+35) -v -vertical angle (-45) and r/l and u/d = default response times as shown in figure 2, the rise response time (from white to black) is 40 ms typical and the fall response time (from black to white) is 50 ms typical. figure 2. response times. r = rise (wht to blk): 40 ms typ f=fall(blktowht): 50mstyp w hite r black white 100% 90% 10% 0% photo- detector output (relative value) f time lc640.480.21-065 operations manual (om610-00) 8 interfacing and operation control basics power requirements the lc640.480.21-065 display requires two power supplies: +5 vdc for the lcd logic and +12 vdc for the backlight. in table 6 below, the backlight current and power are referenced to maximum luminance, 25 c ambient temperature. table 6. input power symbol min typ max units panel panel voltage (nominal = 5.0v) v cc 4.75 5.0 5.25 vdc absolute max. v cc v cc -0.3 ? 6.5 vdc i cc (v cc =5.0v) i cc ? 470 640 madc inverter inverter voltage (nominal = +12.0v) v inv 8.0 12.0 18.0 vdc absolute max. voltage v inv ? ? 20.0 vdc current (v inv = 8.0v, max. luminance) i inv ? 1.6 1.8 adc backlight backlight heater voltage v lh 8.0 12.0 18.0 vdc backlight heater current i lh ? 2.0 3.0 adc cell heater voltage v lh 8.0 12.0 18.0 vdc cell heater current i lh ? 1.0 1.5 adc caution: absolute maximum ratings are those values beyond which damage to the device may occur. lc640.480.21-065 operations manual (om610-00) 9 power sequencing (lcd) when performing power sequencing: ? ensure the supply voltage for input signals is the same as for vcc. ? apply vcc within the lcd operation period. when the backlight turns on before lcd operation or the lcd operation turns off before the backlight turns off, the display may momentarily become white. ? when the power is off, keep whole signals (hsync, vsync, clk, de, and data) low level or high impedance. figure 3. power sequencing. supply voltage sequence vcc signal vali d power-on power-off 4.75 v 4.75 v 0v 0v 0 lc640.480.21-065 operations manual (om610-00) 11 figure 4. timing diagram. tc tch tcrf tcrf tds tdh invalid invalid data clk v ih v il 1.5 v v ih v il 1.5 v v ih v il 1.5 v (r0tor5) (b0tob5) (g0tog5) tdrf tdrf teh tes teh tes terf terf de clk 1.5 v thch thcs hsync thrf v ih v il 1.5 v 1.5 v v ih v il 1.5 v tvh tvs tvrf lc640.480.21-065 operations manual (om610-00) 12 figure 5. timing diagram. lc640.480.21-065 operations manual (om610-00) 13 figure 6. timing diagram. hsync lc640.480.21-065 operations manual (om610-00) 14 video characteristics colors are developed in combination with 6-bit signals (64 steps in grayscale) of each primary red, green, and blue color. this process can result in up to 262,144 (64x64x64) colors. the mapping of the eighteen video data inputs is shown in table 9. table 9. video data color and grayscale map. data signal (0: low level, 1: high level) display colors r5 r4 r3 r2 r1 r0 g5 g4 g3 g2 g1 g0 b5 b4 b3 b2 b1 b0 basic colors black blue red magenta green cyan yellow white 000000 000000 111111 111111 000000 000000 111111 111111 000000 000000 000000 000000 111111 111111 111111 111111 000000 111111 000000 111111 000000 111111 000000 111111 red grayscale black dark bright red 000000 000001 000010 111101 111110 111111 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 green grayscale black dark bright green 000000 000000 000000 000000 000000 000000 000000 000001 000010 111101 111110 111111 000000 000000 000000 000000 000000 000000 blue grayscale black dark bright blue 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 000000 000001 000010 111101 111110 111111 lc640.480.21-065 operations manual (om610-00) 15 pixel position the position of pixel data, relative to the color filter orientation and scan direction inputs is shown in figure 7 below. refer to table 10 to see the relations between the scan direction and the viewing direction. table 10. display positions. normal scan: dps = ?l? or ?open? d (0,0) d (1,0) d (x,0) d (638,0) d (639,0) d (0,1) d (1,1) d (x,1) d (638,1) d (639,1) (d 0,y) d (1,y) d (x,y) d (638,y) d (639,y) d (0,478) d (1,478) d (x,478) d (638,478) d (639,478) d (0,479) d (1,479) d (x,479) d (638,479) d (639,479) reverse scan: dps = ?h? d (639,479) d (638,479) d (x,479) d (1,479) d (0,479) d (639,478) d (638,478) d (x,478) d (1,478) d (0,478) d (639,y) d (638,y) d (x,y) d (1,y) (d 0,y) d (639,1) d (638,1) d (x,1) d (1,1) d (0,1) d (639,0) d (638,0) d (x,0) d (1,0) d (0,0) figure 7. pixel position of input data. d (0,0) d (639,0) d (0,479) d (639,479) d (0,0) d (639,0) d (0,479) d (639,479) j3 j1 j1 j3 normal scan reverse scan lc640.480.21-065 operations manual (om610-00) 16 warmup characteristic some time after startup is required to allow the ccfl tubes to reach their normal operating temperature. the graph in figure 8 shows the typical room temperature warmup curve for the lc640.480.21-065 when set to maximum luminance. figure 8. warmup curve. l uminance vs time (warm-up curves) 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% 80.00% 90.00% 100.00% 0 10203040506070 time (min) percent of max. luminance lc640.480.21-065 operations manual (om610-00) 17 connectors the lc640.480.21-065 display has four connectors on the back near one side of the display. j1 is the video input and backlight control connector, j2 is the backlight inverter and heater connector, and j3 and j8 are the connectors for tethering the ambient light sensor. figure 9. connector locations. video input and backlight control connector (j1) the video input and backlight control signals are connected to the display through a 40-pin, dual-row, 1.27 mm pitch, square pin, locking connector (samtec ftsh-120-01-l-dv-ej-a). the mating connector is available through samtec as a cable assembly (ffsd series). consult your samtec representative (1-800- samtec) for cable and connector options. table 11 on the following page lists the pin assignments for the j1 connector. j1 j2 pin 1 j3 j1 j 8 pin 1 pin 1 1 sw1 on lc640.480.21-065 operations manual (om610-00) 18 table 11. video input and backlight connector (j1) pinouts. pin signal description pin signal description 1 gnd ground 2 clk video clock 3 hsync horiz. sync 4 vsync vert. sync 5 gnd ground 6 r0 red data (lsb) 7 r1 red data 8 r2 red data 9 r3 red data 10 r4 red data 11 r5 red data (msb) 12 gnd ground 13 g0 green data (lsb) 14 g1 green data 15 g2 green data 16 g3 green data 17 g4 green data 18 g5 green data (msb) 19 gnd ground 20 b0 blue data (lsb) 21 b1 blue data 22 b2 blue data 23 b3 blue data 24 b4 blue data 25 b5 blue data (msb) 26 gnd ground 27 de data enable 28 v cc amlcd power 29 v cc amlcd and fan power 30 gnd ground 31 dps display scan select 32 /cbm controlled luminance 33 dim analog dimming control 34 dimref dim reference 35 inv inverter control 36 gnd ground 37 als ambient light sensor 38 ts1 temperature sensor 39 /ht heater indicator 40 /oht overtemp indicator signal i/o description clk i video clock hsync i horizontal sync vsync i vertical sync r0-r5 i red data g0-g5 i green data b0-b5 i blue data gnd i ground ? signal return for logic and power supplies. isolated from the display metal bezel. de i data enable dps i display scan - low or open = normal; high = image upside down v cc i amlcd power supply: +5 vdc inv i inverter - high or open = enable; low = disable (backlight off) /cbm i controlled luminance mode - high or open = normal; low = enabled dim i analogdimmingcontrol-0to+5vdc;+5vdcismaximumluminance dimref o dimming reference - +5 vdc reference for analog dimming als o ambient light sensor - signal to microprocessor: 0 to +5 vdc; +5 vdc is lowest ambient light level tsi o temperature sensor (no. 1) - signal to microprocessor: 0 to +5 vdc, with 0c = 0.5 vdc, and 10 mv/ c /ht o heating indicator - low = display is heating and backlight is turned off /oht o over-temp indicator - low = display temperature is at maximum and luminance is reduced lc640.480.21-065 operations manual (om610-00) 19 backlight inverter and heater connector (j2) this connector supplies 12 vdc nominal to the inverter to operate the backlight inverter and backlight heater. the connector is a molex micro-fit 3.0 wire-to-board header (# 43045-0600). the mating connector is a molex micro-fit 3.0 wire-to-wire receptacle (#43025-0600, crimp # 43030-0007). table 12. backlight inverter and heater connector (j2) pinouts. pin function 1 vdd, inverter 2 inverter ground 3 vlh, backlight heater 4 backlight heater ground 5 vch, cell heater 6 cell heater ground ambient light sensor (tethered option) (j3 and j8) this connector is used when the ambient light sensor is tethered. the connector is a 3-pin molex part number 22-03-5035. the mating connector is molex part number 50-37-5033 with 5263 crimps (molex # 08-70-1040). table 13. ambient light sensor (j3 and j8) pinouts. pin symbol function 1 pdanode photo diode anode 2 pdcath photo diode cathode 3 gnd power ground tethering the light sensor the protruding circuit board area containing the light sensor is designed so it can be snapped off and removed from the main interface board. once the ambient sensor is removed it will require the addition of a cable between j3 and j8 in order to function. with the cable installed the sensor can be remotely positioned. the sensor may be discarded if the ambient sensing capability is not required. to remove the light sensor, place the thumb of your right and left hand on the corresponding front surfaces of the sensor circuit board. place the index fingers of both hands on the display?s rear circuit board just above the sensor. with a firm quick action, push the sensor circuit board back. this will cause the circuit board to snap along the perforation. now rock the sensor circuit board back and forth several times until it is free from the main interface board. connect a cable from j8 on the rear of the sensor circuit board to j3 on the rear of the display. the ambient light sensor should now function normally. lc640.480.21-065 operations manual (om610-00) 20 luminance features backlight dimming control for backlight dimming is performed by several methods depending on how the switches on switch block sw1 (see figure 9) are set as shown in table 14 below. these selections are available for both standard and controlled luminance mode. table 14. backlight dimming control. luminance control switch 1 switch 2 switch 3 manual control off off ? automatic control with ambient light sensor on off ? automatic control with manual offset and ambient light sensor off on ? note : because switch 3 is not used, its position has no effect. manual dimming this mode allows the user to adjust the luminance by varying the input from 0 to +5 vdc on pin 33 (dim) of the video input connector (j1). see figures 10 and 11. table 15. manual dimming specifications. description specification dimming range approximately 300:1 analog voltage input (dim) compatible with voltage and potentiometer (3 terminal) no connection results in maximum luminance voltage range: 0 to +5v (+5v equals maximum luminance) dimming method pulse width modulation (period = 100 millisecond, 256 discrete steps, linear) recommended pot value 10k ohm dim ref high side pot reference output provided, short-circuit protected swi setting switch 1 = off, switch 2 = off figure 10. dimming voltage input on j1 (dim). dimref (pin 34) gnd (pin 36) dim (pin 33) on on on lc640.480.21-065 operations manual (om610-00) 21 figure 11. luminance vs. dimming voltage: manual dimming. luminance vs dimming voltage 0.00 20.00 40.00 60.00 80.00 100.00 0123456 dimming voltage percent of max. luminance (%) lc640.480.21-065 operations manual (om610-00) 22 automatic dimming (ambient light sensor) lamp luminance varies depending on ambient light levels. an off-board light sensor is used to determine the level. see figure 12 below. table 16. automatic dimming (ambient light sensor) specifications. description specification sensor type photodiode, visible light filtered sensor sensitivity 10 na/lux dynamic range 3000 lux ambient = maximum display luminance 0 lux ambient = minimum display luminance ambient to display luminance approximately linear relationship 1 second averaging field of view 50 degrees typical to half sensitivity response visible light filtered, 420 to 675 nm @ 50% points swi setting switch 1 = on, switch 2 = off figure 12. luminance levels: automatic dimming (ambient light sensor). ambient light level (lux) display luminance 0 3000 min max lc640.480.21-065 operations manual (om610-00) 23 automatic dimming (manual offset) lamp luminance varies depending on ambient light levels. an off-board light sensor is used to determine the level. the user can adjust the luminance offset by varying the input from 0 to 5 vdc on pin 33 (dim) of the video input connector (j1). see figure 13 below. table 17. automatic dimming (manual offset) specifications. description specification dim function 0 vdc = max. negative offset (display always at min. luminance) +2.5 vdc = no offset +5 vdc = max. positive offset (display always at max. luminance) dim voltage to offset % linear relationship swi setting switch 1 = off, switch 2 = on figure 13. luminance levels: automatic dimming (manual offset). 4200 0 600 min. max. 1200 1800 2400 3000 3600 ambient light level (lux) display luminance d i m = 4 . 5 v d c d i m = 4 . 0 v d c d i m = 3 . 5 v d c d i m = 3 . 0 v d c d i m = 2 . 5 v d c d i m = 2 . 0 v d c d i m = 1 . 5 v d c d i m = 1 . 0 v d c d i m = 0 . 5 v d c controlled luminance mode this function compensates for the luminance degradation of the lamps over time and constrains the maximum display luminance to approximately 700 cd/m 2 . using a light sensor that measures the lamp luminance inside the light box, the microcontroller adjusts the lamp current to maintain constant luminance at the desired luminance level. for example, if dim = 2.5v (corresponding to a 50% luminance level) in analog dimming mode, then the display luminance will be maintained at approximately 350 cd/m 2 .the controlled luminance mode is enabled when pin 32 (/cbm) on j1 is low. lc640.480.21-065 operations manual (om610-00) 24 backlight enable the inv input on pin 35 of the backlight control connector (j1) directly shuts down the inverter output. table 18. backlight enable specifications. description specification input characteristic cmos logic-compatible; open circuit defaults to high state state definition inv low state turns backlight off temperature considerations the lc640.480.21-065 display is designed to operate over a wide temperature range. to accomplish this, the display must be heated at low temperatures and the power level reduced at high temperatures. at low temperatures, the lamps are heated using nichrome wires. at high temperatures, the internal temperature is lowered by reducing the backlight luminance. two sensors located on the lamp circuit board monitor the internal temperature. the 996-0406-01 product incorporates a cell heater to warm the amlcd cell at cold temperatures. luminance variation due to ambient temperature although the inverter features regulated lamp current drive, luminance will vary across the temperature range due to the characteristics of the ccfl tubes. lamp luminance decreases at low temperatures as the mercury condenses out of the gas and it decreases again at high temperatures as the tube phosphors become less efficient. the lc640.480.21-065 has been designed to provide peak luminance at normal room temperatures without using a heater, and at low temperatures with a heater for the ccfl tubes. backlight power consumption decreases as temperatures climb and the working voltage of the ccfl tubes decreases. the graph in figure 14 indicates typical performance across temperatures. figure 14. backlight power consumption. luminance vs. temperature (steady state luminance, standard luminance mode, display enclosed) 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% 80.00% 90.00% 100.00% -60 -40 -20 0 20 40 60 80 100 temperature (c) percent of max. luminance lc640.480.21-065 operations manual (om610-00) 25 temperature sensors the temperature sensors are located at opposite corners of the backlight module, just outside the active area of the display. the output of the sensors are sent to the microprocessor on the inverter module through a board-to-board connector. heater operation and over heat status lines there are two situations when the inverter controller will override the external control of the backlight: 1. at cold temperatures, the backlight will not turn on until it is warmed up. 2. at high temperatures, the luminance will be reduced until the temperature drops to a safe level. two digital status signals notify the user computer of these conditions. these cmos- level outputs sink up to 20 ma to accommodate an led load. table 19. heater operation and over heat status line parameters. parameter value units heater status (/ht, pin 39, j1) 0 = heating, +5 = normal vdc over heat status (/oht, pin 40, j1) 0 = over heat, +5 = normal vdc backlight heater the backlight heater consists of nichrome wire wrapped around each lamp. the purpose of the heater is to vaporize the mercury at low temperatures providing proper lamp emission color and extending lamp life. when the inverter is first powered up it checks the backlight cavity temperature. if the temperature is below +10 c, the lamp heaters are turned on at 100% duty cycle and the inverter is disabled for a specific time period as shown in figure 15 on page 26. after the time delay, the inverter is enabled and the heater duty cycle is set to the value shown in figure 16 on page 27. the heater continues to operate until the sensor temperature reaches +10 c. see figure 17 on page 27 for actual display warm-up performance. lc640.480.21-065 operations manual (om610-00) 26 table 20. backlight heater parameters. parameter value type resistive wire (nichrome: nicra ? 80% ni 20% cr, 39 awg, 53 ohms/foot) length/lamp ~ 200 mm (7.87 inches)/lamp, 8 revolutions around each lamp, resistance/wire = 36 ohms, total heater resistance = 6 ohms active temperature sensor monitor temperature sensor with the highest reading control duty cycle and maximum power time delay are stepped as shown in figures 15 and 16 inverter enable inverter is enabled as shown in figure 15. if the temperature is below +10c, inverter is turned off until the lamps are heated. status indicator set the status indicator when the inverter is disabled. see ?heater operation and over heat status lines.? on page 25. hysteresis 3.0 c heater voltage 8-18 vdc power 10.6 w (@ 8 v), 54w (@18 v) figure 15. sensor temperature vs. lamp heater (inverter startup time delay) sensor tempature vs lamp heater(@ full power) & inverter startup time delay -10 -5 0 5 10 15 20 25 30 35 -50 -40 -30 -20 -10 0 10 20 30 40 50 sensor temperature (c) lamp htr/invtr startup delay (sec) lc640.480.21-065 operations manual (om610-00) 27 figure 16. sensor temperature vs. lamp heater duty cycle figure 17. display warmup performance. sensor temperature vs lamp heater duty cycle -10 0 10 20 30 40 50 60 70 80 90 100 110 -50 -40 -30 -20 -10 0 10 20 30 40 50 sensor temperature (c) lamp heater duty cycle (%) cold start up: luminance vs time (12 vdc, w/o cell heater, full luminance, display enclosed) 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% 80.00% 90.00% 100.00% 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 22.00 time (min) luminance (nits) -40c ambient -20c ambient 0 c ambient lc640.480.21-065 operations manual (om610-00) 28 cell heater (optional version 996-0406-01) the cell heater consists of a glass panel with an ito coating on one side. there are bus bars along each side of the panel. the heater decreases the response time of the amlcd cell at low temperatures by heating the liquid crystal material in the cell. figure 18 shows the response time performance at different heater voltages. if the temperature is below +10 c, the ito heater is turned on at 100% duty cycle for the time shown in figure 19 on page 29. the heater duty cycle is then set as shown in figure 20 on page 29. table 21. cell heater parameters. parameter value units type resistive: ito on glass (~ 7.5 ohms/square) total resistance ~ 12 ohms none active temperature sensor monitor temperature sensor with the highest reading none control duty cycle is stepped as shown in figure 21 % trip point not applicable c hysteresis 3.0 c heater voltage 8-18 vdc power 5.3 (@ 8 v), 27 (@18v) watts figure 18. cell heater response time performance. display response time vs time (with cell heater, ambient temperature = -40c, vdim=2.5) 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 0 2 4 6 8 10 12 14 16 18 time (minutes) response time (millisec onds) cell heater voltage = 0.0 cell heater voltage = 8.0 cell heater voltage = 12.0 cell heater voltage = 18.0 lc640.480.21-065 operations manual (om610-00) 29 figure 19. cell heater maximum power time. figure 20. cell heater duty cycle. sensor temperature vs maximum power time (ito cell heater) -1 0 1 2 3 4 5 6 -50 -40 -30 -20 -10 0 10 20 30 40 50 sensor temperature (c) maximum power time (min) s ensor temperature vs duty cycle (ito cell heater) -10 0 10 20 30 40 50 60 70 80 90 100 110 -50 -40 -30 -20 -10 0 10 20 30 40 50 sensor temperature (c) duty cycle (%) lc640.480.21-065 operations manual (om610-00) 30 high temperature control at high temperatures, thermal control is performed by decreasing the maximum duty cycle of the backlight inverter. see table 22 and figure 21 below. table 22. high temperature control parameters. parameter value units active temperature sensor monitor temperature sensor with the highest reading none control maximum duty cycle is stepped as shown in figure 21 % hysteresis 3.0 c figure 21. temperature control: maximum pulse width modulation duty cycle. sensor temperature vs maximum pwm duty cycle -10 0 10 20 30 40 50 60 70 80 90 100 110 80 85 90 95 100 105 110 115 120 sensor temperature (c) maximum pwm duty cycle (%) lc640.480.21-065 operations manual (om610-00) 31 defects emissive defects table 23. emissive defects. item specification line defect not allowed luminous dots color red, green, blue distance between same color dot defects quantity brightness: f + h 1 ? r+g+b 15 brightness: f 1 6.5 mm 6 pairs, each color 4 adjacent two dots 6 pairs, each color adjacent three or more dots 0 pair, each color dark dots 23 color red, green, blue distance between same color dot defects quantity ? 8, each color 5 adjacent three or more dots 0 pair, each color 1 ?f? means full-luminous dot(s), bright point independent from viewing angle. ?h? means half-luminous dot(s), bright point dependent on viewing angle. 2 dark dots are counted while the screen is illuminated with red, green, or blue dots only. 3 adjacency is considered separately for each color; adjacency among red, green, and blue is not considered as adjacent. 4 when the distance between two pairs is 10 mm, this situation is not allowed. if distance is 10 mm, the quantity is 0 pair. 5 adjacent two dark dots is counted as one point. lc640.480.21-065 operations manual (om610-00) 32 cosmetic defects table 24. cosmetic defects. item measurement criteria quantity polarizer scratch remarkable scratches 0 points polarizer bubbles, wrinkles, or dent average diameter d 0.5 mm 3 points width 0.05 mm ? all allowed 0.05 mm width 0.1 mm l<0.7mm 0.7 mm l 1.0 mm 1.0 mm < l all allowed 5 points 0 point 0.1 mm < width ? 0 point other objects or dust between polarizer and glass average diameter d 0.2 mm 0.2 mm < d < 0.3 mm* 0.3 mm d 0.5 mm* 0.5 mm < d all allowed 11 points 4 points 0 points * the distance between each defect is larger than 6.5 mm. figure 22. diameter calculation. lc640.480.21-065 operations manual (om610-00) 33 display dimensions the recommended clearance shown in figure 23 indicates the distance behind the display module that should be left to provide free-flow of air for convection cooling. in figure 23, dimensions are in millimeters. figure 23. display dimensions. unless specified, tolerances are: .x = 0.50 .xx = 0.25 note: the dimensions in this drawing are approximate. please contact planar applications engineering to request the actual drawing prior to beginning your design. description of warranty this description is not the full warranty, and should not be construed as a substitute for the full warranty. a copy of the full warranty is available upon request. planar warrants that the goods it sells will be free of defects in materials and workmanship, and that these goods will substantially conform to the specifications furnished by planar, and to any drawings or specifications furnished to the seller by the buyer if approved by the seller. this warranty is effective only if planar receives notice of such defect or non-conformance during the period of warranty, which begins the day of delivery. the goods planar sells are warranted for a period of one year unless otherwise agreed to by planar and the buyer. the buyer must return the defective or non-conforming goods, upon request, to planar not later than 30 days after planar?s receipt of notice of the alleged defect or non-compliance. buyer shall prepay transportation charges, and planar shall pay for return of the goods to the buyer. no goods are to be returned to planar without prior permission. the warranty does not apply in cases of improper or inadequate maintenance by the buyer, unauthorized modification of the goods, operation of the goods outside their environmental specifications, neglect or abuse of the goods, or modification or integration with other goods not covered by a planar warranty when such modification or integration increases the likelihood of damage of the goods. ordering information product part number description lc640.480.21-065 996-0406-00 standard lc640.480.21-065 htr 996-0406-01 cell heater, conformal coating lc640.480.21-065 cc 996-0406-02 conformal coating design and specifications are subject to change without notice. planar systems continues to provide optional, and in many cases custom, features to address the specific customer requirements. consult planar sales for pricing, lead time and minimum quantity requirements. support and service planar is a u.s. company based in beaverton, oregon and espoo, finland, with a world-wide sales distribution network. full application engineering support and service are available to make the integration of planar displays as simple and quick as possible for our customers. rma procedure : for a returned material authorization number, please contact planar systems, inc. with the model number(s) and serial number(s). when returning goods for repair, please include a brief description of the problem, and mark the outside of the shipping container with the rma number. north & south america oem sales europe & asia-pacific oem sales planar systems, inc. 1400 nw compton drive beaverton, or 97006-1992 tel. +1 (503) 690 1100 fax +1 (503) 690 1493 sales@planar.com app_eng@planar.com planar systems, inc. olarinluoma 9, p.o. box 46 fin-02201 espoo, finland tel. +358 9 42 0010 fax +358 9 420 0200 intlsales@planar.com tech_support@planar.com visit the planar web site: http://www.planar.com om610-00 |
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