Video display device

Patent metadata

Field	Value
Publication number	US-10678064-B2
Application number	US-201916522329-A
Country	US
Kind code	B2
Filing date	Jul 25, 2019
Priority date	Jul 26, 2018
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A drive gradation table is configured as follows. The number of subframes turned to a drive state is increased each time drive gradations are increased. When all of the subframes are divided into a plurality of subframe groups including a plurality of continuous subframes, as gradations are increased, subframes turned to the drive state are increased in order from the latest subframe group to the earliest subframe group among the plurality of subframe groups. In each of the subframe groups, the subframes turned to the drive state are increased in order from the earlier subframe to the later subframe.

First claim

What is claimed is:

1. A video display device comprising:
a subframe data generator configured to convert video data with N+1 gradations into subframe data with N bits based on a drive gradation table, where N is a natural number;
a display element; and
a drive circuit configured to drive the display element based on the subframe data,
wherein the drive gradation table is configured such that
a number of subframes turned to a drive state is increased each time drive gradations are increased,
when all of the subframes are divided into a plurality of subframe groups including a plurality of continuous subframes, as gradations are increased, subframes turned to the drive state are increased in order from a latest subframe group to an earliest subframe group among the plurality of subframe groups, and
in each of the subframe groups, the subframes turned to the drive state are increased in order from the earlier subframe to the later subframe.

2. A video display method comprising:
converting video data with N+1 gradations into subframe data with N bits based on a drive gradation table, where N is a natural number; and
driving a display element based on the subframe data,
wherein the drive gradation table is configured such that
a number of subframes turned to a drive state is increased each time drive gradations are increased,
when all of the subframes are divided into a plurality of subframe groups including a plurality of continuous subframes, as gradations are increased, subframes turned to the drive state are increased in order from a latest subframe group to an earliest subframe group among the plurality of subframe groups, and
in each of the subframe groups, the subframes turned to the drive state are increased in order from the earlier subframe to the later subframe.

Assignees

• Jvckenwood Corp

Inventors

• Nakajima Nobuki
• Makabe Takeshi

Classifications

• H04N13/139

  Format conversion, e.g. of frame-rate or size · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G02B30/25 Primary

  using polarisation techniques · CPC title

• H04N13/167

  Synchronising or controlling image signals · CPC title

• H04N13/337

  using polarisation multiplexing · CPC title