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Liquid crystal displays
24 24 dots transmissive large-sized
liquid crystal display unit
RCU1383U-A
Thanks to the high contrast and wide viewing angle of the RCU1383U-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.
Applications
Public displays such as airport displays,
train station displays, information
boards, and billboards.
Features
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.
External dimensions (Units: mm)
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Liquid crystal displays RCU1383U-A
Block diagram
Pin functions
(1) Upper board
Input (CN3)
Output (CN4)
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Liquid crystal displays RCU1383U-A
(2) Lower board
Input (CN1)
Output (CN2)
FAbsolute maximum ratings (Ta = 25_C)
FElectrical characteristics (V
DD = 5.0 V ± 0.25 V, Ta = 25_C)
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Liquid crystal displays RCU1383U-A
FAC characteristics (VDD = 5.0 V, GND = 0 V, Ta = 25_C)
FTiming characteristics
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Liquid crystal displays RCU1383U-A
FOptical characteristics (Ta = 25_C)
(Note 1) Drive waveform
Static drive
(Note 2) Definition of response speed
Tr : Time for segment to darken 90% after selective wa-
veform switches to non-selective waveform.
φ = 180_ , θ = 10_
Td : Time for segment to darken 90% after selective wa-
veform switches to non-selective waveform.
φ = 180_ , θ = 10_
(Note 3) Definition of viewing angle (φ, θ)
(3) Maximum viewing angle : The direction with high-
est contrast expressed at the time axis (refer to
above table).
(Note 4) Definition of contrast ratio
〈Definition〉
Luminance during application
of non-selective waveform
Contrast ratio=
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
n
(1) φ : Angle subtended by the Y-Y’-axis and the ob-
server’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)
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Liquid crystal displays RCU1383U-A
Data format (data and display mapping)
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Liquid crystal displays RCU1383U-A
Timing chart
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Liquid crystal displays RCU1383U-A
FOperation notes
(1) Attention points in handling
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 If the module is to be used for long periods subjected
to direct sunlight, employ a filter to block the ultraviolet
rays.
S 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
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 modules circuitry that can be
easily damaged by static electricity .
S Do not remove the liquid crystal panel from the unit.
S Do not touch the back side of the liquid crystal panel.
(4) Precautions during unit assembly
S In order to protect the polarizing plate from dirt or
scratches, it is recommended to use a protective cover
on the front surface.
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