Memory LCD
High Resolution. Enduring. Thin, Lightweight Design.
Traditional graphic display module solutions include bi-stable, cholesteric, and STN technologies. These present a variety of design and performance issues, including high driving voltages, slow response time, image retention, complicated interfaces, and others.
The Memory LCD combines matrix technology with a one-bit memory circuit embedded into every pixel, ensuring information retention upon its writing. This allows the design of products with ultra-low power consumption and extended battery life. It also delivers higher resolution, shock and temperature tolerance than e-paper (electronic paper) displays.
Data Memory in Each Pixel
An embedded driver chip and peripheral circuit are located on the LCD glass.
Ultra-Low Power Consumption
The Memory LCD requires just 1/40 ～ 1/80 of an STN-LCD’s power consumption and 1/1000 of an AM-TFT LCD’s power consumption.
• Excellent reflective display performance without the need to add a backlight.
• The embedded pixel memory stores graphic data – so no continuous refresh is required for a still image.
• Less power consumption is required during refresh than for traditional graphic displays.
Rapid Image Refresh and Updating
• Memory LCDs have faster response time than traditional graphic or bi-stable displays, enabling video and scrolling text.
• Cholesteric, STN, and e-paper displays require longer times to update the display image (several hundred milliseconds).
Top-of-Class Visual Performance
• High-Resolution capability for graphic images
– 0.150 mm pixel pitch or narrower
• High Contrast for good indoor/outdoor readability
– Cholesteric and Reflective STN have below 10%; contrast and color are affected by temperature.
– Viewable in any light, from edge-of-vision darkness to brightest sunlight
– Reflective, plus Transflective models
• High Reflectivity for good indoor/outdoor readability
– HR Type: 20% (typ.)
• Wide/symmetrical viewing angle
– Up to 170° × 170°
Simple 3-Wire Interface
The Memory LCD features simple 3-wire Serial I/F connectivity (SI, SCS, SCLK).
• Only a 3 V / 5 V single power supply is required*
• Only 3 Capacitors Required.
• Fewer peripheral components = simplified design process.
*Depending on display model
