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Liquid crystal device

A liquid crystal display device, liquid crystal technology, applied to static indicators, instruments, etc., can solve the problems of cost increase, image quality deterioration, bleeding, etc., and achieve the effect of preventing image quality deterioration and high-quality overlapping image display

Inactive Publication Date: 2010-06-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] According to the above-mentioned prior art, for example, when superimposing text data such as a subtitle machine and a video signal displayed by PAL for OSD display, part of the data is masked as a prerequisite and is not generated. Therefore, through the masking process of the display line, the image Deterioration of quality, resulting in unrecognizable characters
In addition, there are sometimes issues with text appearing dark, bleeding, or flickering
[0009] On the other hand, according to the technology disclosed in Patent Document 1 and Patent Document 2, although the above-mentioned problems can be solved, it is necessary to add hardware such as font memory or image output circuit to different standards. In addition to increasing the number of parts, the control becomes Complicated, becoming the main reason for cost increase

Method used

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Embodiment Construction

[0036] figure 1 A schematic diagram showing an example of sub-image data generated by the liquid crystal display device of the present invention and a liquid crystal display displayed using the sub-image data. For comparison, figure 2 Shown is a schematic diagram of an example of sub-image data generated by a conventional liquid crystal display device and its liquid crystal display.

[0037] The liquid crystal component uses 1 frame composed of odd and even fields to display, figure 1 and figure 2 It’s the same in both, (a) represents the sub-image data and its liquid crystal display in the even field, (b) represents the sub-image data and its liquid crystal display in the odd field, (c) represents the liquid crystal display in one frame composed of them .

[0038] figure 1 and figure 2 The main image data is generated in accordance with the PAL standard, and the liquid crystal module is assumed to be in accordance with the NTSC standard. In addition, in order to comply with...

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Abstract

The present invention discloses a liquid crystal display apparatus which is capable of preventing picture quality deterioration caused by a shielding treatment and executing superposition videographic display with high level. The liquid crystal display apparatus shields scanning driving signals of the main image data according to a specified scaling ratio, then the main image data is consistent with the effective display line number of a liquid crystal display component; the main image is in superposition with the subimages whose display line number is different from that of the main image and is displayed through a liquid crystal component 46; and a subimage data creating unit (a subimage data creating circuit 42) used for shielding the scanning driving signals of the main image data according to the specified scaling ratio and synchronously generating invalid data added to the subimage data is arranged.

Description

Technical field [0001] The present invention relates to an ideal liquid crystal display device which prevents the deterioration of the display image quality of text data when image data of different standards are displayed on a liquid crystal display module according to a certain standard. Background technique [0002] In the past, it has been known that both video signals generated in accordance with the NTSC (National Television Standards Committee) standard and video signals generated in accordance with the PAL (Phase Alternating Line) standard can be displayed. LCD (Liquid Crystal Device) display device. [0003] The above-mentioned liquid crystal display device is controlled according to the difference in the number of display lines constituting a screen between the two standards (the effective number of display lines is 234 for the NTSC standard and 273 for the PAL standard, for example), so that the screen is shielded in a certain ratio ( Extracted) PAL standard display lin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133
Inventor 犬塚达裕仁田武志
Owner MITSUBISHI ELECTRIC CORP