LP121S4 liquid crystal display p roduct general specification ver. 1. 2 apr.12, 2000 page 1 / 6 1. general description the lg.philips lcd co.,ltd. LP121S4 lcd is a color active matrix liquid crystal display with an integral cold cathode fluorescent tube(ccft) back light system. the matrix employs a - si thin film transistor as the active element. it is a transmissive type display operating in the normally white mode. this tft - lcd has a 12.1 inch diagonally measured active display area with svga resolution(600 vertical by 800 horizontal pixel array). each pixel is divided into red, green and blue sub - pixels or dots which are arranged in vertical stripes. gray scale or the brightness of the sub - pixel color is determined with a 6 - bit gray scale signal for each dot, thus, presenting a pallet of more than 262,144 colors. the LP121S4 lcd is intended to support applications where low power consumption, weight and thickness are critical factors and graphic displays are important. in combination with the vertical arrangement of the sub - pixels, the LP121S4 characteristics provide an excellent flat panel display for office automation products such as portable computers. block diagram display data & timing signal power (v dd , gnd) input connector timing converter power supply gate drive circuit source drive tft - lcd (800x3x600) g600 g599 g g d1 d2 d2399 d2400 v bl gnd cn2 lamp general display characteristics the following are general feature of the model LP121S4 lcd; active display area outsize dimensions pixel pitch pixe l format color depth display operating mode surface treatment 12.1 inches(30.75cm) diagonal 261 w x 199 h x 6.0 d mm typ. 0.3075 mm x 0.3075 mm 800 horiz. by 600 vert. pixels rgb stripe arrangement 6 - bit transmissive mode, normally white hard coating(3h), anti - glare treatment of the front polarizer cn1 cn2 datasheet 4 .com u
LP121S4 liquid crystal display p roduct general specification ver. 1. 2 apr.12, 2000 page 2 / 6 2 . electrical specifications 2 - 1. electrical characteristics the l p121s4 requires two power inputs. one is employed to power the lcd electronics and to drive the tft array and liquid crystal. the second in put which powers the ccfl, is typically generated by an inverter. the inverter is an external unit to the lcd. table 1 electrical characteristics: parameter symbol values units notes min. typ. max. module: power supply input voltage power supply i nput current ripple/noise logic input level, high logic input level, low power consumption lamp operating voltage operating current established starting voltage at 25 at 0 operating frequency discharge s tabilization time power consumption life time v dd i dd - v ih v il p c v l i l v s f l t s p l 3.0 215 - 0.6v dd - 0.71 595(6ma) 3.0 - - 45 2.15 10 ,000 3.3 235 50 - - 0.77 630(5ma) 5 .0 - - 55 3.15 - 3.6 265 - v dd 0.3v dd 0. 88 715(3ma) 6 .0 960 12 80 80 3 3.57 - vdc ma mv vdc vdc w v rms ma v rms v rms k hz minutes w h ou rs 1 1 2 3 4 5 6 7 i l =6ma rms note)the design of the inverter must have specifications for the lamp in lcd assembly. the performance of the lamp in lcm,for example life time or brightness is extremely influenced by the characteristics of the dc - ac inverter. so all the parameters of an inverter should be carefully designed so as not to produce too much leakage current from high - voltage output of the invert er. when you design or order the inverter, please make sure unwanted lighting caused by the mismatch of the lamp and the inverter(no lighting,flicker,etc) never occurs. when you confirm it,the lcd assembly should be operated in the same condition as installed in your instrument. notes: 1 . the current draw and power consumption specified is for 3.3 vdc at 25 and 38.5mhz (at 64 gray pattern displayed ). 2. the variance of the voltage is 10%. 3. the voltage above v s sho uld b e appli ed to the lamps for more than 1second for start - up. otherwise, the lamps may not be turned on. 4. the output of the inverter must have symmetrical(negative and positive) voltage waveform and symmetrical current waveform.(unsymmetrical rati o is less than 10%) please do not use the inverter which has unsymmetrical voltage and unsymmetrical current and spike wave. lamp frequency may produce interference with horizontal synchronous frequency and as a result this may ca use beat on the display. therefore lamp frequency shall be as away as possible from the horizontal synchronous frequency and from its harmonics in order to prevent interference. 5.let ? s define the brightness of the lamp after being lighte d for 5 minutes as 100%. t s is the time required for the brightness of the center of the lamp to be not less than 95%. 6 . the lamp power consumption shown above does not include loss of external inverter. 7 . the life time is determined as the time at which brightness of lamp is 50% compare d to that of initial value at the typical lamp current on condition of continuous operating at 25 2 . 2 - 2 . interface connections datasheet 4 .com u
LP121S4 liquid crystal display p roduct general specification ver. 1. 2 apr.12, 2000 page 3 / 6 this lcd employs two interface connections, a 30 pin connect or is used for the module electronics and a two pin connector is used for the integral backlight system. the electronics interface connector is a model 55177 - 3091, manufactured by molex. the pin configuration for the connector is shown in the table below. table 3 module connector pin configuration pin symbol description notes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 gnd dclk gnd hsync vsync dtmg gnd r0 r1 r2 r3 r4 r5 gnd g0 g1 g2 g3 g4 g5 gnd b0 b1 b2 b3 b4 b5 gn d v dd v dd ground main clock ground horizontal sync. vertical sync. data timing signal ground red data red data red data red data red data red data ground green data green data green data green data green data green data ground blue data blue data blue data blue data blue data blue data ground power input power input see note 1 lcd side connector : 55177 - 3091(molex) system side connector : 1) wire type :51146 - 3000(molex) 2) fpc type : 54281 - 3010(molex) +3.3vdc power supply input, see note 2 +3.3vdc power supply input, see note 2 notes: 1. all gnd(ground) pins should be connected together which should also be connected to the lcd?s metal frame. 2. all v dd (po wer input) pins should be connected together. the backlight interface connector is a model bhsr - 02vs - 1, manufactured by jst. the mating connector part number is sm02b - bhss - 1 - tb or equivalent. the pin configuration for the connector is shown in the table below. table 5 backlight connector pin configuration pin symbol description notes 1 2 hv lv lamp power input ground 1 notes: 1. the input power terminal is colored pink . ground pin color is black. < lcm front side > 1....30 lcm bottom user con. < rear view > datasheet 4 .com u
LP121S4 liquid crystal display p roduct general specification ver. 1. 2 apr.12, 2000 page 4 / 6 notes 1. unspecifie d dimensional tolerance are 0.5mm 2. screw torque : 1.3 - 1.5kgf. < lcm back side > datasheet 4 .com u
LP121S4 liquid crystal display p roduct general specification ver. 1. 2 apr.12, 2000 page 5 / 6 datasheet 4 .com u
LP121S4 liquid crystal display p roduct general specification ver. 1. 2 apr.12, 2000 page 6 / 6 3 .precautions the lcd products listed on this documents are not suitable for use of military,industry,medical etc. system. if customers intend to use these lcd produ cts for above application, please contact ours sales people in advance. datasheet 4 .com u
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