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Collimated scanning backlight device

A technology of equipment and backlight, applied in mechanical equipment, light guide, optics, etc., can solve the problem of expensive film

Inactive Publication Date: 2006-04-05
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this film is expensive and typically only achieves a limited amount of brightness gain

Method used

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  • Collimated scanning backlight device
  • Collimated scanning backlight device
  • Collimated scanning backlight device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The invention relates to a scanning backlight system, for example for use with a display panel to create a display device. exist Figure 7 A schematic diagram of a display device 1 including a scanning backlight 2 in which the invention can be implemented is disclosed in . The entire backlight 2 is configured behind the display panel 3 .

[0020] The display panel 3 basically comprises a layer 4 of optoelectronic material, such as a liquid crystal material, based on e.g. twisted nematic, optically compensated birefringence, in-plane switching, super twisted nematic or ferroelectric operation, in order to provide a light valve function for modulating the incident Light on display panel. The layer 4 is substantially sandwiched between the first and second substrates 5,6. Furthermore, the display panel 3 is suitably subdivided into a matrix of pixels controlled by electrode means (not shown) arranged on said substrates 5,6. Preferably, active matrix addressing is used....

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PUM

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Abstract

The invention relates to a scanning backlight device, based on dynamic light extraction, the device comprising a light guide structure (24), a light source for emitting light, arranged to be directed into said light guide structure, the light guide structure (24) being provided with an addressable out-coupling member, comprising two or more defined areas, each providng switchable out-coupling of light from said light guide structure (24). The scanning backlight device is characterised in that at least one micro-optical redirection member (23), arranged in proximity with said light guide structure (24), being arranged to redirect light emitted from said light guide structure (23) in an essentially normal direction of said light guide structure.

Description

technical field [0001] The invention relates to a scanning backlight device based on dynamic light extraction, the device comprising a light guide structure, a light source for emitting light configured to lead into said light guide structure, the light guide structure being equipped with an addressable outcoupling ( out-coupling) component comprising two or more defined regions, each defined region providing switchable outcoupling of light from said light guiding structure. Background technique [0002] Displays utilizing light valve or shutter technology are commonly used today. A typical example of such a display is a liquid crystal display, which is usually driven by means of an active matrix drive. The basic function of a light valve or shutter display is that the display, or its pattern of pixels, can transmit light (white pixels) or block light (black pixels), but the display itself does not generate light. Therefore, an illumination backlight is required. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00F21V8/00
CPCG02B6/0033G02B6/0053G02B6/00G02F1/1335
Inventor M·J·J·贾克H·J·科内里斯森H·德康宁D·J·布罗尔
Owner KONINKLIJKE PHILIPS ELECTRONICS NV