Apparatus and method for processing image data supplied to image display apparatus

A technology of image display device and image processing device, which is applied in the direction of image communication, color signal processing circuit, static indicator, etc., and can solve problems such as image quality deterioration

Inactive Publication Date: 2005-05-25
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a change in contrast also leads to deterioration of image quality.

Method used

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  • Apparatus and method for processing image data supplied to image display apparatus
  • Apparatus and method for processing image data supplied to image display apparatus
  • Apparatus and method for processing image data supplied to image display apparatus

Examples

Experimental program
Comparison scheme
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no. 5 Embodiment

[0107] G. The fifth embodiment;

[0108] H. Variations.

[0109] A. The structure of the mobile phone:

[0110] Fig. 1 is a block diagram showing the structure of a mobile phone 10 equipped with an image processing device according to a first embodiment of the present invention. The mobile phone 10 includes a color LCD panel 20 as an image display unit, and a system unit 60 including a CPU, ROM, RAM, and the like. The mobile phone 10 is connected to the server SV through an external network TN, and can download displayed image data to the color LCD panel 20 .

[0111] A color LCD panel includes a glass substrate, RGB color filters, transparent electrodes, a polarizer, a backlight, and an LCD driving circuit. The color LCD panel 20 of this embodiment is designed with an LCD driving circuit to display 256 colors with 3 bits of R (red), 3 bits of G (green) and 2 bits of B (blue).

[0112] The color LCD panel 20 of this embodiment uses STN type liquid crystals and is driven by...

no. 2 Embodiment

[0153] Fig. 12 is a block diagram showing the structure of a mobile phone 10B equipped with an image processing device according to a second embodiment of the present invention. It should be noted that, except for the matters described below, it is the same as the first embodiment. The mobile phone 10B includes a color LCD panel 20 as an image display unit, and a system unit 60B. The color LCD panel 20 of the mobile phone 10B includes a temperature sensor 70 and a light sensor 80 . The temperature sensor 70 detects the ambient temperature using the color LCD panel. The light sensor 80 detects the brightness of the environment in which the color LCD panel 20 is used.

[0154] The system unit 60B includes the application program 30, the browser 40, and the image processing module 50B. The image processing module 50B includes an image processing unit 52B and an LCD driver 56B. The image processing unit 52B includes a resolution converting unit 53 , an image data correcting un...

no. 3 Embodiment

[0160] Fig. 15 is a block diagram showing the structure of a mobile phone 10C equipped with an image processing device according to a third embodiment of the present invention. Except for the matters described below, it is the same as the second embodiment. The mobile phone 10C includes a color LCD panel 20 as an image display unit and a system unit 60C. The color LCD panel 20 includes a temperature sensor 70 and a light sensor 80, and the temperature and brightness detected by them are sent to the electronic capacity automatic setting unit 59 and the tone value correction data generating unit 54D described later.

[0161] The system section 60C includes the application program 30, the browser 40, and the image processing module 50C. The image processing module 50C includes an image processing section 52C and an LCD driver 56B. The image processing unit 52C includes a resolution conversion unit 53 , an image data correction unit 54C, and a halftone processing unit 55 .

[0...

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PUM

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Abstract

An image processing device that performs predetermined image processing on image data to be displayed on an image display device to generate display data to be supplied to the image display device, the image display device being a device capable of displaying The number of display tones on the display is less than the number of tones of the image data, and the output brightness for the display tonal value of the display data is graded, and at the same time, it has wide and narrow nonlinear display characteristics at intervals; it is characterized in that, The image processing device includes a color reduction processing unit that divides the tone range of the tone value of the image data into wide and narrow intervals corresponding to the display characteristics, according to the rule of simple color reduction processing or the rule of halftone processing. In either case, color reduction processing is performed by assigning the tone value in the interval to the display tone value.

Description

[0001] This application is a divisional application of the original application with the application number 01119078.7 and the filing date of May 25, 2001. The first prior application of the original application is JP01-105425, and the priority date is May 25, 2000. technical field [0002] The present invention relates to processing of image data supplied to an image display device. Background technique [0003] Conventionally, a liquid crystal display (LCD: Liquid Crystal Display) panel has been used as an image display unit of a mobile phone. The LCD panel displays two-tone characters and images by changing the transmittance of liquid crystals by turning ON / OFF the driving voltage of liquid crystal cells arranged in a matrix. In recent years, mobile phones have been multifunctionalized, and models that can be connected to the Internet are appearing. Along with this situation, the LCD panel of the mobile phone is required to display multi-tones so that more information ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/02G09G3/20G09G3/36G09G5/06
CPCG09G3/2018G09G3/2051G09G3/3607G09G5/06G09G2320/0276G09G2320/041G09G2340/0407G09G5/02
Inventor 锹田直树石田浩和
Owner SEIKO EPSON CORP
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