search 
 
 
 
 
 
 

   CHANNEL-E ELECTRONICS EUROPE





Memory in pixel LCD 15-06-09


A display - memorizing the image it shows so only pixels have to be rewritten which content changes from frame to frame - has recently been invented by Sharp based on the company's proprietary Continuous Grain Silicon technology. For this special type of display each pixel is equipped with memory circuitry to save the image information uploaded to the display. Therefore the image information has to be rewritten only in the pixels whereas the content has changed in comparison to the previous picture frame.

 

With common LC displays microcontroller have to rewrite the complete screen content from frame to frame at a rate of 50 to 60 Hz even though most of the image content remains the same. Consequently standard LCDs have a power consumption which is about 130 times higher than the one of the newly developed Memory LCDs. A Memory LCD of 1.35 inches consumes about 15 µW in operation whereas a standard LCD of comparable size needs about 2 mW to render an image. Different from other reflective displays, the new type of LCD does not need polarisers. Thanks to a special liquid crystal material the image is generated by the status of the pixel just changing from black to white with a reflectivity of 50%.

 

Due to their miniscule power consumption small size solar cells provide enough electricity to drive Memory LCDs. The new type of display is therefore a solution for small size portable applications such as wrist watches, pulse meter and other fitness devices, price tags, etc. Such systems can even be designed as no-battery applications using solar cells as power supply. Samples of the new Memory LCD are available starting Q2 2009 from Sharp sales offices in Europe.

 

Specifications

 

 

Type

Memory in Pixel LCD

Display size

1.35 inch

Resolution

96 x 96

Active Area Size

24.192 (H) x 24.192 (V) mm

Dot Pitch

0.252 (H) x 0.252 (V) mm

Module Dimensions

28.2 (W) x 32.34 (H) x 1.4 (D) mm

Contrast

10 : 1

Colours

Monochrome (silver metallic)

Reflection Ratio

50%

Temperature range (operation)

- 20 to +70

Interface

Serial (3 wires for data)

Power consumption (No display data update)

15 µW

Supply voltage

+ 5.0V

 


RECENT BUSINESS NEWS

Mentor Graphics acquires Berkeley Design Automation

IDT names Global Vice President Of Operations and CTO

Freescale employees confirmed passengers on Malaysia Airlines Flight MH370

Silicon Labs acquires assets from Touchstone Semi

European semiconductor distribution in Q4/2013

Ipetronik names TecRep as sales partner

MACOM acquires Nitronex


RECENT PRODUCT NEWS

High Flex Cat6A GigE Cable Assemblies

MiniLEDs with luminous intensity of 4900 mcd

iSystem: Wireless debugger

Toshiba: news 650V SiC power devices

IR: half-bridge power modules for motors up to 300W

Onsemi: automotive grade power management ICs

DSP-based System-on-Chip for Hearing Health Solutions


Copyright © channel-e IMPRINT |  PRIVACY