Method of processing image data for image display panel

A technology of image display panels and image data, applied in the direction of static indicators, instruments, etc., can solve the problem of increased loss

Active Publication Date: 2014-04-30
SHARP KK
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the perceived loss of resolution can be reduced by these methods, there is still this pe

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  • Method of processing image data for image display panel
  • Method of processing image data for image display panel
  • Method of processing image data for image display panel

Examples

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Embodiment Construction

[0066] Description of the embodiment

[0067] In a first embodiment the display consists of a standard (single wide viewing angle (public) mode only) LCD display with modified control electronics that allows the display to operate in wide viewing angle (public) or narrow viewing angle (privacy) mode . LCD displays are typically constructed from several component parts, including:

[0068] 1. Backlight unit for providing even, wide-angle illumination to the panel.

[0069] 2. Control electronics for receiving digital image data and outputting an analog signal voltage for each pixel, as well as timing pulses and a common voltage for the counter electrodes of all pixels. exist figure 1 A schematic diagram of a standard layout for LCD control electronics is shown in (Ernst Lueder, Liquid Crystal Displays, Wiley and sons Ltd, 2001).

[0070] 3. Liquid crystal (LC) panel, used to display images by spatial light modulation, consists of two opposing glass substrates, one of which...

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Abstract

A method of processing image data for an image display panel comprises, in a first mode: determining signal voltages to be applied to pixels of the image display panel from received image data constituting an image for display on the image display panel and from a secondary data value for the pixel thereby to generate luminance variations perceivable at a first viewing position (5) but substantially not perceivable at a second viewing position (3). The signal voltages to be applied to pixels in a group of pixels are determined such that the overall luminance of the pixels in the group is dependent on (for example, proportional to) the overall luminance specified for the pixels in the group by the image data. The number of pixels in a group is locally variable and is selected according to the image data and/or the secondary data values for pixels in a region of the image where the group is to be defined. The invention makes it possible to specify luminance redistribution over an increased pixel group size in local regions in which the main image content is relatively uniform, with no high spatial resolution image features, while specifying luminance redistribution over a reduced pixel group size for main image regions with sharp edges and other high resolution features.

Description

technical field [0001] The present invention relates to display devices, such as active matrix liquid crystal display devices, switchable between public and private display modes. Background technique [0002] Several types of displays are known that are switchable between public and private display modes, with varying degrees of added cost, ease of use, and privacy performance strength over standard displays. [0003] Devices incorporating these displays include mobile phones, personal digital assistants (PDAs), laptop computers, desktop monitors, automated teller machines (ATMs), and electronic point-of-sale (EPOS) equipment. Also, these devices are not effective in distracting specific observers (e.g., drivers or those operating heavy machinery) who are able to see specific images at specific moments (e.g., an in-vehicle TV screen while a car is in motion). May be beneficial in safe settings. [0004] There are several methods for adding light control devices, such as m...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/20
CPCG09G3/003G09G2320/068G09G3/36G09G2358/00G09G2320/0686
Inventor B·J·布劳顿江指正洋前田健次渡边辰雄
Owner SHARP KK
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