RCM1990U-A Liquid crystal displays 16×16 dots large-sized liquid crystal display unit RCM1990U-A Thanks to the high contrast and wide viewing angle of the RCM1990U-A, which is provided by its unique design technology, 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. zApplications Public displays such as airport displays, train station displays, information boards, and billboards. zFeatures 1) Wide viewing angle, high contrast, and fast response. 2) Compact and light weight for easy assembly. 3) Low power consumption. zExternal dimensions (Unit : mm) 56.00±0.30 54.00Min. 50.97±0.30 1.0Max. 0.3Max. 2.515±0.30 1.10±0.10 1.10±0.10 2.65±0.30 (64.70) 54.00Min. 2.00Max. 2.50±0.30 23.75Min. 20.75Min. (15.00) 27.00±0.30 (4.00) 35.00±0.50 (R3.20) 8 1 8 CN 2 23.00±0.30 46.00±0.50 (40.5) 1.00±0.30 2.70±0.50 4.00±0.30 (8.00) 57.50±0.30 36.75Min. 33.75Min. (3.50) 61.00±0.30 2.00Max. 1 CN 1 C2.0 1/8 RCM1990U-A Liquid crystal displays zBlock diagram COM.2 LCD 64 output driver IC COM Generator circuit COM.1 64 output driver IC FLM VO VDD M CL1 CL2 DO GND FLM VO VDD M CL1 CL2 DI GND OUTPUT INPUT zPin functions Upper board Input (CN3) Pin No. Symbol IN/OUT 1 FLM IN Frame start signal 2 VO − Liquid crystal drive power supply 3 VDD − 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, 0 : Off) 8 GND − Ground potential Pin No. Symbol IN/OUT 1 FLM OUT 2 VO − Liquid crystal drive power supply 3 VDD − 5 Volts 4 M OUT AC conversion signal 5 CL1 OUT Data latch signal 6 CL2 OUT Shift register shift signal 7 DI OUT Display data signal 8 GND − Function Output (CN4) Function Frame start signal Ground potential 2/8 RCM1990U-A Liquid crystal displays zAbsolute maximum ratings (Ta=25°C) Parameter Symbol Power supply Logic circuit voltage LCD drive Limits Unit VDD −0.3 to +7.0 V VDD-VEE −0.3 to +7.0 V Input voltage VIN −0.3 to VDD+0.3 V Operating temperature Topr 0 to +50 °C Storage temperature Tstg −10 to +60 °C zElectrical characteristics (Ta=25°C, VDD=5.0V±0.25V) Symbol Min. Typ. High level input voltage VIH 3.5 Low level input voltage VIL − High level output voltage VOH 4.6 Low level output voltage VOL − Recommended LCD drive voltage VLCD − 5.0 IDD − 1.0 Parameter Current dissipation Max. Unit − − V − 1.5 V − − V IOH=−0.4mA − 0.4 V IOH=+0.4mA − V Ta=25°C 3.0 mA Conditions fCL=1MHz, fM=70Hz zAC characteristics (Ta=25°C, VDD=5.0) Parameter Symbol Applicable terminal Min. Typ. Max. Unit fCL CL2 − − 1 MHz High level lock width tCWH CL1, CL2 470 − − ns Low level lock width tCWL CL2 470 − − ns Data setup time tSU DI 120 − − ns Clock setup time 1 tSL CL2 220 − − ns Clock setup time 2 tLS CL1 220 − − ns Shift frequency Data hold time tDH DI 120 − − ns FLM setup time tFDS FLM 120 − − ns FLM hold time tFDH FLM 120 − − ns Clock rise / fall time tct CL1, CL2 − − 50 ns Output delay time tpd DO − − 250 ns AC conversion signal fM M − 70 − Hz 3/8 RCM1990U-A Liquid crystal displays zTiming characteristics CL2 VIH VIL tCWL tCWH tct tct VIH VIL DI VIH tDH tSU tpd tSL VOH VOL DO VIH VIL CL1 tLS tCWH tct tct VIH FLM tFDS tFDH zOptical characteristics (Ta=25°C) No. Symbol Temperature (°C) Min. Parameter Tr 1 Response speed Td 2 Max. − 65 130 0 − 400 800 25 − 45 100 300 25 0 − 150 Front-back θ 25 0 − 60 Right-left φ 25 90 − 270 K 25 20 40 − Viewing angle Contrast ratio 3 Typ. Unit Note ms (Note 2) deg (Note 3) K≥3 φ=180° θ=10° (Note 1) Drive waveform Static drive 1/f VOP 1 / 2VOP 0 −1 / 2VOP −VOP f = Frequency (Note 2) Definition of response speed ON OFF IOFF 0.91 I T 0.11 ION Tr Td 4/8 RCM1990U-A Liquid crystal displays Tr : Time for segment to darken 90% after selective waveform switches to non-selective waveform. φ=180°, θ=10° Td : Time for segment to darken 90% after selective waveform switches to non-selective waveform. φ=180°, θ=10° (Note 3) Definition of viewing angle (φ, θ) Y(φ = 0°) Z θ Observer X(φ = 90°) X'(φ = 270°) φ LCD Z' Y'(φ = 180°) (1) φ : Angle subtended by the Y-Y’-axis and the observer’s position projected onto the XY-plane. (2) θ : 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 above table). (Note 4) Definition of contrast ratio <Definition> Contrast ratio = Luminance during application n of non-selective waveform Luminance during application of selective waveform Except, n=1 with positive display and n=−1 with negative display. < Measurement conditions > Drive conditions : As per specifications Viewing angle : φ=180°, θ=10° (Note 5) Principles of optical measuring equipment Specimen Illumination Photometry Characteristic measuring device LCD-5100 Constant temperature chamber 5/8 RCM1990U-A Liquid crystal displays zData format (data and display mapping) D1 D17 D33 D49 D65 D81 D177 D193 D209 D225 D241 D2 D18 D34 D50 D66 D82 D178 D194 D210 D226 D242 D3 D19 D35 D51 D67 D83 D179 D195 D211 D227 D243 D4 D20 D36 D52 D68 D84 D180 D196 D212 D228 D244 D5 D245 D6 D246 D7 D247 D8 D248 D9 D249 D10 D250 D11 D251 D12 D252 D13 D29 D45 D61 D77 D93 D189 D205 D221 D237 D253 D14 D30 D46 D62 D78 D94 D190 D206 D222 D238 D254 D15 D31 D47 D63 D79 D95 D191 D207 D223 D239 D255 D16 D32 D48 D64 D80 D96 D192 D208 D224 D240 D256 D6 D8 FIRST DATA D2 D4 D250 D252 D254 D256 COM.2 DATA D1 D3 D5 D7 D249 D251 D253 D255 COM.1 DATA LAST DATA 6/8 RCM1990U-A Liquid crystal displays zTiming chart fM M FLM CL1 fCL CL1 CL2 DATA COM.2 DATA COM.1 DATA CL2 DATA D2 D4 D6 D285 D286 D287 D288 D2 D4 D6 No.1 panel D285 D286 D287 D288 D1 D3 D5 D285 D286 D287 D288 D2 D4 D6 No.2 panel COM.2 DATA No.n panel COM.1 DATA CL1 SEG. (ON / ON) SEG. (ON / OFF) SEG (OFF / OFF) COM.1 COM.2 7/8 RCM1990U-A Liquid crystal displays zOperation notes (1) Attention points in handling • 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. • If the module is to be used for long periods subjected to direct sunlight, employ a filter to block the ultraviolet rays. • Do not store the module in areas of high temperature or high humidity. Do not store the module in locations exposed to direct sunlight or fluorescent light. (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 latchup phenomenon. (3) Precautions during installation • Be careful to avoid damage from static electricity. A CMOS-IC is used in the modules circuitry that can be easily damaged by static electricity. • Do not remove the liquid crystal panel from the unit. • Do not touch the back side of the liquid crystal panel. (4) Precautions during unit assembly • In order to protect the polarizing plate from dirt or scratches, it is recommended to use a protective cover on the front surface. 8/8 Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design. The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction. Appendix1-Rev1.1