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Liquid crystal displays
24 24 dots multicolored largesized liquid crystal display unit
RCM1381U-A
Thanks to the high contrast and wide viewing angle of the RCM1381U-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. Moreover, the RCM1381U-A is a multi-purpose 24 24 dot multicolor display that is capable of displaying eight different colors for a vivid and colorful display.
FApplications Large displays such as airport displays, train station displays, message boards, etc.
FExternal dimensions (Unit: mm)
FFeatures 1) Wide viewing angle, high contrast, and fast response. 2) Compact and lightweight for easy assembly. 3) Low power consumption.
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Liquid crystal displays
FBlock diagram
RCM1381U-A
FPin functions (1) Upper board Input (CN3)
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Liquid crystal displays
Output (CN4)
RCM1381U-A
(2) Lower board Input (CN1)
Output (CN2)
FAbsolute maximum ratings (Ta=25_C)
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Liquid crystal displays
FElectrical characteristics FDC characteristics (VDD=5.0V10%, VDD-VEE=3.0 to 6.0V, GND=0V, Ta=25_C)
RCM1381U-A
FAC characteristics (VDD=5.0V10%, VDD-VEE=3.0 to 6.0V, GND=0V, Ta=25_C)
FTiming characteristics
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FOptical characteristics (Ta=25_C)
RCM1381U-A
(Note 1) Definition of response speed
(Note 3) Definition of contrast ratio < Definition > Luminance during application of non-selective waveform Contrast ratio = Luminance during application of selective waveform
n
Tr : Time for segment to darken 90% after selective waveform switches to non-selective waveform. = 180_, = 10_ Td : Time for segment to darken 90% after selective waveform switches to non-selective waveform. = 180_, = 10_ (Note 2) Definition of viewing angle (, )
Except, n = 1 with positive display and n = *1 with negative display. < Measurement conditions > Drive conditions : As per specifications Viewing angle : = 180_ : = 10_ (Note 4) Principles of optical measuring equipment
(1) (2) (3)
: Angle subtended by the Y-Y'-axis and the observer's position projected onto the XY-plane. : Angle subtended by observer and the normal Z-Z'-axis (X-axis and Y-axis are positive) Maximum viewing angle: The direction with highest contrast expressed at the time axis (refer to above table).
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FData format
RCM1381U-A
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FTiming chart
RCM1381U-A
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FPrecautions during use (1) Handling precautions S Protect the module from strong shocks as they can cause damage or defective operation. S 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. S If the liquid crystal panel is damaged and liquid crystal contacts your clothing or body, wash immediately with soap and water. S Do not touch the IC lead electrodes or the electrode terminal components. S 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 S Do not connect or disconnect the module while the power supply is turned on. S 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 S 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. S 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 an ion blower or other deionizing device is recommended.
RCM1381U-A
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