Image processing device, display device, and image processing method

A technology of an image processing device and a display device, applied in the field of image processing, can solve the problems of generating moire fringes and false colors, and achieve the effect of suppressing the moire fringes or false colors

Active Publication Date: 2017-06-13
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the case of performing color display with four-color sub-pixels, moiré fringes or false colors may occur if the frequency band of the image signal is limited independently for each color.

Method used

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  • Image processing device, display device, and image processing method
  • Image processing device, display device, and image processing method
  • Image processing device, display device, and image processing method

Examples

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Embodiment Construction

[0056] 1. Structure

[0057] figure 1 It is a diagram showing the configuration of a display device 1 according to an embodiment. In this example, the display device 1 is a projector that projects, onto the screen S, an image corresponding to an image signal (video signal) supplied from an external device. The display device 1 has a light source 10 , a liquid crystal panel 20 , a projection lens 30 , an image processing circuit 40 , and a drive circuit 50 . The light source 10 is a light source for projecting light, and includes a light source device such as an ultra-high pressure mercury lamp or a metal halide lamp. The liquid crystal panel 20 is a light modulation device (light valve) that modulates light emitted from the light source 10 . In this example, the liquid crystal panel 20 is a transmissive panel and has liquid crystal sealed between a pair of transparent electrodes. One of the transparent electrodes is divided into a plurality of pixels arranged in a matrix. ...

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Abstract

The present invention provides an image processing device capable of suppressing occurrence of moiré fringes or false colors when performing color display by sub-pixels of four colors. The image processing device has a filter processing unit. The filter processing unit limits the frequency bands of the X-direction and Y-direction frequencies of the signals R, G, B, and W based on the positional relationship between the sub-pixels corresponding to the respective colors and other sub-pixels. Furthermore, the filter processing unit adjusts the frequency response of the image signal of each color according to the amplitude of the high-frequency component of the image signal corresponding to each other color.

Description

technical field [0001] The present invention relates to image processing in the case of performing color display by sub-pixels of four colors. Background technique [0002] There are a stripe array and a triangle array in the arrangement of pixels of a display device using three primary colors (for example, refer to Patent Document 1). In these display devices, one pixel is composed of three sub-pixels. Besides these arrays, Bayer arrays are known. The Bayer array includes two G (green) sub-pixels, one R (red) sub-pixel, and one B (blue) sub-pixel, and a total of four sub-pixels in two rows and two columns constitutes one pixel. [0003] In a display device using a Bayer array, generally, color display is performed using image data having a number of pixels that is 1 / 4 of the number of pixels of input image data. In this case, the resolution of the actually used image data is lower than the resolution of the input image data. Therefore, in order to suppress moire fringes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20
CPCG09G5/02G09G5/06G09G2300/0452G09G2340/06G09G3/002G09G3/2003G09G3/3607G09G2310/0297G09G2310/027
Inventor 西乡学
Owner SEIKO EPSON CORP
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