Methods for driving video electro-optic displays

Patent metadata

Field	Value
Publication number	US-10319313-B2
Application number	US-12446208-A
Country	US
Kind code	B2
Filing date	May 21, 2008
Priority date	May 21, 2007
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

Video displays using relatively low frame rates of about 10 to about 20 frames per second, but having acceptable video quality are described. The displays may use bistable media, and may be driven such that the medium, when driven, changes its optical properties continuously during the driving of each frame. The displays may use an electro-optic medium such that the frame period is from about 50 to about 200 per cent of the switching time of the electro-optic medium at the driving voltage used.

First claim

The invention claimed is:

1. A method of driving a bistable electro-optic display comprising a bistable electro-optic medium wherein a frame period is from about 50 to about 200 percent of the switching time of the bistable electro-optic medium, wherein the bistable electro-optic medium undergoes a series of smooth, largely uninterrupted changes in optical state between successive images.

2. A method of driving a bistable electro-optic display comprising a bistable electro-optic medium wherein a frame period is from about 75 to about 150 percent of the switching time of the bistable electro-optic medium, wherein the bistable electro-optic medium undergoes a series of smooth, largely uninterrupted changes in optical state between successive images.

3. A method of driving a bistable electro-optic display comprising a bistable electro-optic medium wherein a frame period is from about 50 to about 200 percent of the switching time of the bistable electro-optic medium, and wherein the bistable electro-optic medium undergoes a series of smooth, largely uninterrupted changes in optical state between successive images and comprises a rotating bichromal member or electrochromic medium.

4. A method of driving a bistable electro-optic display comprising a bistable electro-optic medium wherein a frame period is from about 50 to about 200 percent of the switching time of the bistable electro-optic medium, and wherein the bistable electro-optic medium undergoes a series of smooth, largely uninterrupted changes in optical state between successive images and comprises an electrophoretic medium, which itself comprises a plurality of electrically charged particles disposed in a fluid and capable of moving through the fluid under the influence of an electric field.

5. A method according to claim 4 wherein the electrically charged particles and the fluid are confined within a plurality of capsules or microcells.

6. A method according to claim 4 wherein the electrically charged particles and the fluid are present as a plurality of discrete droplets surrounded by a continuous phase comprising a polymeric material.

7. A method according to claim 4 wherein the fluid is gaseous.

Assignees

• Harris George G
• Patry Shamus Ford
• Mccreary Michael D
• E Ink Corp

Inventors

• Harris George G
• Patry Shamus Ford
• Mccreary Michael D

Classifications

• G09G2340/0435

  Change or adaptation of the frame rate of the video stream · CPC title

• G09G2340/16

  Determination of a pixel data signal depending on the signal applied in the previous frame · CPC title

• G09G3/344 Primary

  based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167) · CPC title

• G09G2310/02

  Addressing, scanning or driving the display screen or processing steps related thereto · CPC title

• G09G3/2011

  by amplitude modulation · CPC title