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. External dimensions (Units: mm) 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. 133 Liquid crystal displays Block diagram Pin functions (1) Upper board Input (CN3) Output (CN4) 134 RCU1383U-A Liquid crystal displays RCU1383U-A (2) Lower board Input (CN1) Output (CN2) FAbsolute maximum ratings (Ta = 25_C) FElectrical characteristics (VDD = 5.0 V ± 0.25 V, Ta = 25_C) 135 Liquid crystal displays FAC characteristics (VDD = 5.0 V, GND = 0 V, Ta = 25_C) FTiming characteristics 136 RCU1383U-A Liquid crystal displays RCU1383U-A FOptical characteristics (Ta = 25_C) (Note 1) Drive waveform Static drive (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〉 Luminance during application of non-selective waveform (Note 2) Definition of response speed n 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 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) (1) (2) φ : Angle subtended by the Y-Y’-axis and the observer’s position projected onto the XY-plane. θ : Angle subtended by observer and the normal Z-Z’-axis (X-axis and Y-axis are positive) 137 Liquid crystal displays Data format (data and display mapping) 138 RCU1383U-A Liquid crystal displays RCU1383U-A Timing chart 139 Liquid crystal displays 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. 140 RCU1383U-A