Displaying device and its light regulation method

A technology for a display device and an adjustment method, which is applied in projection devices, identification devices, image reproducers using projection devices, etc., and can solve problems such as poor image quality, inability to obtain sufficient contrast, and inability to adjust white light source light
CN1540391AInactive Publication Date: 2004-10-27SEIKO EPSON CORP
0 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SEIKO EPSON CORP
Publication Date
2004-10-27
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a display device and a light adjusting method thereof capable of carrying out light adjustment effectively by the output control of a light source and, preferably, of effecting light adjustment according to color distribution of a displayed image. The display device of the invention that is capable of adjusting a displayed image by changing light flux can include a plurality of light sources having light emitting diodes, an image analyzing unit for outputting a light control signal for controlling the output of each of the light sources, based on an image signal of the displayed image, and a light control device for controlling the output of each of the light sources based on the light control signals.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a display device and a light adjustment method thereof. Background technique

[0002] Conventional projection type display devices have the following problems.

[0003] (1) Sufficient contrast cannot be obtained due to light leakage or scattered light occurring in several optical elements constituting one optical system. That is, the displayable luminance range (dynamic range) is narrow, and the image quality is inferior compared with existing image monitors using cathode ray tubes (hereinafter referred to as CRT).

[0004] (2) Although improvement in image quality is sought through various image signal processing, it is impossible to exhibit sufficient effects due to a fixed dynamic range.

[0005] As a solution to the problems associated with such projection type display devices, ie, a method of expanding the dynamic range, it may be considered to change the flux of light components incident to the light modulation device (...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More