ROHM RCM1381U-A handbook
Contents
1. 4 DATA SEG ON ONTON id e 45 2 1234 71 ee OFF ON OFF N L SEG OFF OFF OFF come _ ll Ape 147 Liquid crystal displays RCM1381U A Precautions during use 1 Handling precautions Protect the module from strong shocks as they can cause damage or defective operation The polarizing plate on the surface of the module is soft and can easily be scratched Wipe away dirt and dust using an alcohol based cleanser If the liquid crystal panel is damaged and liquid crystal contacts your clothing or body wash immediately with soap and water Do not touch the IC lead electrodes or the electrode terminal components e If the module is to be used for long periods subjected to direct sunlight employ a filter to block the ultraviolet rays 2 Precautions during operation Do not connect or disconnect the module while the power supply is turned on Input the input signal after the module power supply is turned on When turning it off turn off the input signal first Otherwise the IC may be damaged by the latch up phenomenon 3 Precautions during installation Be careful to avoid damage from static electricity A CMOS IC is used in the module circuitry that can be easily damaged by static electricity A protective film is pasted over the front and back of the module to protect the panel surfaces When peel2. 2 Compact and lightweight for easy assembly 3 Low power consumption 101 1 0 3 23 59 0 3 45 82 23 59 0 3 930 5 DH Liquid crystal displays RCM1381U A G Block diagram OUTPUT GND Do 4 CL2 CL1 M Voo Vo FLM Upper side 72 output 72 output 72 output 72 output driver IC driver IC driver IC driver IC COM 24 24dot R G B COM generator circuit 72 output 72 output 72 output 72 output driver driver driver driver de E 0 lt GND OUT
3. 0 ns FLM hold time FLM 120 ns Clock rise fall time tet CL1 CL2 50 ns Output delay time DO 250 ns AC conversion signal fm M 70 2 Timing characteristics DI DO FLM 144 tFos Liquid crystal displays RCM1381U A G Optical characteristics Ta 25 C Measuremenrt points No Parameter Symbol Temperature C B Unit Note Min Typ Max 25 75 150 Tr 0 500 1000 1 Response speed ms Note 1 25 60 120 Td 0 360 750 2 Front back 0 25 0 ES 60 T iewing angle e SEM Rightleft 4 25 40 270 9 Note2 180 3 Contrast ratio K 25 15 30 10 Note 1 Definition of response speed Time for segment to darken 90 after selective wa veform switches to non selective waveform 180 10 Timeforsegmentto darken 90 after selective wa veform switches to non selective waveform 180 0 10 Note 2 Definition of viewing angle 6 Y 70 lt Observer 90 z Y 180 Angle subtended by the Y Y axis and the ob server s position projected onto the XY plane Angle subtended by observer and the normal Z Z axis X axis and Y axis are positive 3 Maximum viewing angle The direction with highest contrast expressed at the time axis refer to ab
4. Liergirh crystal displays 24 x 24 dots multicolored large sized liquid crystal display unit RCM1381U A Thanks to the high contrast and wide viewing angle ofthe RCM1381U A which is provided by its unique design technolo gy this module brings forth new applications in brand new LCD fields ROHM large sized LCD units are perfect displays for information or sign boards As a media for informational display large sized LCD units must possess high visibility wide viewing angles and other such superior qualities ROHM large sized LCDs boast an excellent track record and possess guaranteed functionality for assured satisfaction in a variety of situations Moreover the RCM1381U A is a multi purpose 24 x 24 dot multicolor display that is capable of displaying eight different colors for a vivid and colorful display Applications External dimensions Unit mm Large displays such as airport displays train station displays message boards SEES etc 92 18 4 0 3hole PA Q Features 1 Wide viewing angle high contrast and fast response
5. PUT Lower side Pin functions 1 Upper board Input CN3 Pin No Signal IN OUT Function 1 GND Ground potential 2 D IN Display data signal 1 On 0 Off 3 CL2 IN Shift register shift signal reads data at rise fall 4 CL1 IN Data latch signal displays at rise fall edge 5 M IN AC conversion signal for liquid crystal drive output 6 5 volts 7 VO Liquid crystal drive power supply 8 FLM IN Frame start signal 142 Liquid crystal displays RCM1381U A Output CN4 Pin No Signal IN OUT Function 1 GND Ground potential 2 DO OUT Display data signal 3 CL2 OUT Shift register shift signal 4 CL1 OUT Data latch signal 5 M OUT AC conversion signal 6 Vpop 5 volts 7 VO Liquid crystal drive power supply 8 FLM OUT Frame start signal 2 Lower board Input CN1 Pin No Signal IN OUT Function 1 FLM IN Frame start signal 2 vo Liquid crystal drive power supply 3 5 volts 4 M IN AC conversion signal for liquid crystal drive output 5 CL1 IN Data latch signal displays at rise fall edge 6 CL2 IN Shift register shift signal reads data at rise fall 7 DI IN Display data signal 1 On O Off 8 GND Ground potential Output CN2 Pin No Signal IN OUT Function 1 FLM OUT Frame start signal 2 VO Liquid crystal drive power supply 3 Voo 5 volts 4 M OUT AC conv
6. ersion signal 5 CL1 OUT Data latch signal 6 CL2 OUT Shift register shift signal 7 DO OUT Display data signal 8 GND Ground potential Absolute maximum ratings Ta 25 C Parameter Power supply Logic circuit 0 3 7 0 Symbol Limits Unit voltage LCD drive Voo Vee 0 3 7 0 Input voltage ViN 0 3 Vpp4 0 3 V Operating temperature Topr 0 50 Storage temperature Tstg 10 60 143 Liquid crystal displays G Electrical characteristics DC characteristics Voo 5 0V 1096 Vop Vee 3 0 to 6 0V GND 0V 25 RCM1381U A Parameter Symbol Min Typ Max Unit Conditions High level input voltage 3 5 zm V Low level input voltage Vi 1 5 V High level output voltage VoH 4 6 V 0 4 Low level output voltage VoL 0 4 V 0 4mA Recommended LCD drive voltage 4 2 5 0 V 25 Current dissipation 25 0 mA fc 1MHz fm 70Hz characteristics Voo 5 0V 10 Voo Vee 3 0 to 6 0V GND 0V Ta 25 C Parameter Symbol Applicable terminal Min Typ Max Unit Shift frequency fc CL2 4 MHz High level lock width CL1 CL2 470 ns Low level lock width tow CL2 470 ns Data setup time tsu DI 120 ns Clock setup time 1 tsi CL2 220 ns Clock setup time 2 tis CL1 220 ns Data hold time toH DI 120 ns FLM setup time trps FLM 12
7. ing this film off be sure to peel as slow as possible in order to minimize the generation of static electricity Use of an ion blower or other deionizing device is rec ommended 148
8. ove table Note 3 Definition of contrast ratio lt Definition gt during application of non selective waveform Contrast ratio premens during application of selective waveform Except n 1 with positive display and n 1 with nega tive display Measurement conditions gt Drive conditions As per specifications Viewing angle 180 10 Note 4 Principles of optical measuring equipment Specimen Characteristic Constant temperature chamber Liquid crystal displays RCM1381U A Data format Upper COM 1 Red D1 D2 D3 D4 D285 D286 D287 D288 COM 2 Green D1 D2 D3 D4 D285 D286 D287 D288 COM 3 Blue LAST DATA FIRST DATA Lower D1 D2 D3 D4 D285 D286 D287 D288 COM 1 Red D1 D2 D3 D4 D285 D286 D287 D288 COM 2 Green D1 D2 D3 D4 D285 D286 D287 D288 COM 3 Blue LAST DATA 146 Liquid crystal displays RCM1381U A Timing chart t No 2panel COM 2 4
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ROHM RCM1381U A handbook