RCM1277U-A Liquid crystal displays 16 x 16 dots transmissive large-sized liquid crystal display unit RCM1277U-A Thanks to the high contrast and wide viewing angle of the RCM1277U-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. !External dimensions (Units : mm) 2.5±0.3 1.1±0.1 2.65±0.3 Viewing direction [6:00] [R3.2] [40.5] 2.52 CN1 8 23±0.3 1 8 1 2 to 2.8 dia. 0.2 3 CN2 0.71 C0.1 46±0.5 Please specify the viewing direction Dots details 1.0±0.3 4±0.3 2.7±0.5 [64.7] 2Max. 51±0.2 61±0.3 57.5±0.3 36.75Max. 33.75Max. 23.75Min. 20.75Min. (3.5) (8) 1) Wide viewing angle, high contrast, and fast response. 2) Compact and light weight for easy assembly. 3) Supports negative or positive display. 4) Low power consumption. 1.1±0.1 2Max. 35±0.5 !Features 56±0.3 54Min. 50.97±0.1 1Max. 0.3Max. 2.515±0.3 54Min. Public displays such as airport displays, train station displays, information boards, and billboards. 27±0.3 (4) (15.5) !Applications RCM1277U-A Liquid crystal displays !Block diagram 64 output driver IC COM. 2 COM. 1 LCD COM waveform generator circuit 64 output driver IC FLM VDD VO M CL1 CL2 DI GND FLM VDD VO M CL1 CL2 DO GND OUTPUT INPUT !Pin functions (1) Input (CN1) Pin no. Symbol IN / OUT 1 FLM IN 2 VO - Liquid crystal drive power supply Applies 5 V Function Frame start code 3 VDD - 4 M IN Liquid crystal drive output AC conversion signal 5 CL1 IN Data latch signal (displays at rising edge) 6 CL2 IN Shift register shift signal (reads data at falling edge) 7 DI IN Display data signal (1: On, 0: Off) 8 GND - Ground (2) Output (CN2) Pin no. Symbol IN / OUT 1 GND - 2 DO OUT Display data code 3 CL2 OUT Shift lock signal 4 CL1 OUT Data latch signal 5 M OUT AC conversion signal 6 VDD - 5V 7 VO - Liquid crystal drive power supply 8 FLM OUT Function Ground Frame start signal RCM1277U-A Liquid crystal displays !Absolute maximum ratings (Ta = 25°C) Parameter Logic power supply voltage LCD drive voltage Input voltage Symbol Limics Unit VDD −0.3~+7.0 V VDD-VO −0.3~+7.0 V −0.3~VDD+0.3 V VIN Operating temperature Topr 0~+50 °C Storage temperature Tstg −10~+60 °C !Electrical characteristics (VDD = 5.0V ± 0.25V, Ta = 25°C) Parameter Input high level voltage Symbol Min. Typ. Max. Unit VIH 3.5 - - V Conditions Input low level voltage VIL - - 1.5 V Output high level voltage VOH 4.6 - - V −IOH = −0.4mA Output low level voltage VOL - - 0.4 V IOL = +0.4mA Power supply current IDD - - 6.0 mA fCL = 1MHz, fM = 70Hz !AC characteristics (VDD = 5.0V ± GND = 0V, Ta = 25°C) 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 Data hold time tDH DI 120 - - ns Clock rise / fall time tct CL1, CL2 - - 50 ns FLM setup time tFDS FLM 120 - - ns FLM hold time tFDH FLM 120 - - ns Output delay time tpd DO - - 250 ns AC conversion signal fM M - 70 - Hz Parameter Shift frequency !Timing characteristics CL2 VIH VIL tCWL tCWH tct DI VIH VIL VIH tct tDH tSU tSL tpd DO VOH VOL VIH ViL CL1 tLS tCWH tct FLM tct VIH tFDS Fig.1 tFDH RCM1277U-A Liquid crystal displays !Optical characteristics (Ta = 25°C) NO. Parameter Symbol Temperature (°C) Min. Typ. Max. Tr 25 - 65 130 Td 25 - 45 100 Front-back θ 25 0 - 60 Right-left φ 25 90 - 270 25 20 - - Response speed 1 Viewing angle 2 3 Contrast ratio (Note 1) Drive waveform Static drive Unit Note ms (Note 2) deg (Note 3) K≥3 - (Note 4) (3) Maximum viewing angle: The direction with highest contrast expressed at the time axis (refer to above table). 1/f (Note 4) Definition of contrast ratio <Definition> Vop 1 / 2Vop 0 -1 / 2Vop -Vop f = Frequency (Note 2) Definition of response speed Contrast ratio = ON 0.91 T 0.11 ION Tr Td 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°) n Luminance during application of selective waveform OFF IOFF I Luminance during application of non-selective waveform Z Specimen Illumination Photometry Observer X (φ = 90°) X' (φ = 270°) φ LCD 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) Characteristic measuring device LC-4M Constant temperature chamber θ Z' 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 RCM1277U-A Liquid crystal displays !Data format (data and display mapping) D1 D17 D33 D49 D65 D81 D193 D209 D225 D241 D2 D18 D34 D50 D66 D82 D194 D210 D226 D242 D3 D19 D35 D51 D67 D83 D195 D211 D227 D243 D4 D20 D36 D52 D68 D84 D196 D212 D228 D244 D197 D213 D229 D245 D5 D6 D246 D7 D247 D8 D248 D9 D249 D10 D250 D11 D251 D12 D188 D204 D220 D236 D252 D13 D29 D45 D61 D77 D189 D205 D221 D237 D253 D14 D30 D46 D62 D78 D190 D206 D222 D238 D254 D15 D31 D47 D63 D79 D191 D207 D223 D239 D255 D16 D32 D48 D64 D80 D192 D208 D224 D240 D256 FIRST DATA D2 D4 D6 D8 D252 D254 D256 D251 D253 D255 COM.2 DATA D1 D3 D5 D7 COM.1 DATA LAST DATA RCM1277U-A Liquid crystal displays !Timing chart fM M FLM CL1 CL1 fCL CL1 DATA COM.2 DATA COM.1 DATA CL2 DATA D2 D4 D6 No. 1 panel 254 256 D2 D4 248 250 252 254 256 No. 2 panel COM.2 DATA CL1 SEG. (ON / ON) SEG. (ON / OFF) SEG (OFF / OFF) COM.1 COM.2 D2 D4 D6 D8 254 256 258 D1 D3 No. n panel COM.1 DATA RCM1277U-A Liquid crystal displays !Operation 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. • Do not touch the IC lead electrodes or the electrode terminal components. • 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. • During handling of the module, in order to prevent damage to the tab, do not bend it more than two times. (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. • A protective film is pasted over the front and back of the module to protect the panel surfaces. When peeling this film off, be sure to peel as slow as possible in order to minimize the generation of static electricity. Use of a ion blower or other deionizing device is recommended.