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Apparatus, display device, method, program, storage medium and lookup table for operating a display device comprising a display panel

A technology for display panels and display devices, applied in the field of lookup tables, capable of solving problems such as reduced image quality

Inactive Publication Date: 2012-07-04
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality of the images shown to legitimate, on-axis viewers in this privacy mode is severely degraded
[0014] In GB2428152A1 (published on January 17, 2007) and GB application GB0804022.2 (published as GB2457106A on August 5, 2009) a solution similar to the one used on the Sh702iS phone is given, but with Image data is manipulated in a manner that relies on a second, occluded image, and thus causes the occluded image to be perceived by an off-axis viewer when the modified image is displayed

Method used

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  • Apparatus, display device, method, program, storage medium and lookup table for operating a display device comprising a display panel
  • Apparatus, display device, method, program, storage medium and lookup table for operating a display device comprising a display panel
  • Apparatus, display device, method, program, storage medium and lookup table for operating a display device comprising a display panel

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Embodiment Construction

[0051] Description of the embodiment

[0052] Embodiments of the present invention provide means for computing image data modifications for liquid crystal displays with privacy features of the type described in GB2457106A.

[0053] In common mode, the display can operate essentially unchanged from a standard LCD, where for each frame of displayed video, the data making up a single image is provided to the display controller, which then outputs a series of signal voltages and timing signals to the active matrix array of the display, and these voltages redirect the liquid crystal directors in each pixel so that the required amount of light is transmitted by each pixel through the display polarizer to enable the image to be displayed.

[0054] In privacy mode, the display controller outputs a signal voltage that depends on two input images, the main image for on-axis viewing by legitimate viewers, and the side image for viewing by (off-axis) viewers not in front of the display i...

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PUM

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Abstract

A method of operating a display device comprising a display panel comprises receiving main and side image pixel data respectively representing a main image (S1) and a side image (S2). For each of a plurality of pixel groups (S3), where each pixel group comprises at least one pixel of the main image pixel data and at least one spatially corresponding pixel of the side image pixel data, a predetermined mapping is performed (S4) using the pixel data of the pixel group as input. The mapping holds output pixel data for the input pixel data which is known to produce an average on-axis luminance with substantially no dependence on the side image pixel data of the group and an average off-axis luminance with substantially no dependence on the main image pixel data of the group. The signals used to drive the display panel are determined from the output pixel data (S5).

Description

technical field [0001] The present invention relates to an apparatus, a display device, a method, a program, a storage medium, and a look-up table for operating a display device including a display panel, such as an active matrix display device operable in a private display mode. Background technique [0002] In a first, public mode of a display device switchable between public and private display modes, the device generally behaves as a standard display. A single image is displayed by the device to all observers with the widest possible range of viewing angles, with optimum brightness, image contrast and resolution. In a second, privacy mode, the main image is only discernible within a reduced range of viewing angles, which are usually centered on the normal to the display surface. A viewer looking at the display from outside this reduced range of angles will perceive a second, occluded image that obscures the main image, or degrades into a main image that appears incompre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G06F21/84
CPCG06F21/84H04N5/57H04N21/44G09G3/3611H04N21/41415G09G2358/00H04N21/4318G09F19/14G09G3/36H04N5/44G09G3/20
Inventor B·J·布劳顿M·路特斯前田健次渡边辰雄稻森良充安本隆
Owner SHARP KK
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