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Surface illumination device and display device using the same

A surface lighting and end face technology, applied in the direction of lighting devices, light guides of lighting systems, lighting and heating equipment, etc., can solve the problems of reducing light utilization efficiency and display quality damage

Inactive Publication Date: 2005-07-27
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the anti-reflection film does not completely prevent the reflection of such unmodulated light towards the outside of the display surface, some part of the light entering the film is still reflected light
Thus, the display quality is somewhat compromised
[0007] In addition, such an unnecessary reflected light component is a useless component for display work, so it is one of factors that substantially reduce the utilization efficiency of light emitted from a light source

Method used

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  • Surface illumination device and display device using the same
  • Surface illumination device and display device using the same
  • Surface illumination device and display device using the same

Examples

Experimental program
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Embodiment Construction

[0035] These and other aspects of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] figure 1 It schematically shows the cross-sectional structure of a front lamp according to an embodiment of the present invention, and the cross-sectional structure of a reflective liquid crystal display device using it. figure 2 It is a schematic plan view of the front light.

[0037] in figure 1 Among them, the front light 10 has a light guide sheet 1 and a side light portion 2 placed on the end face 1E side of the front light. The front light 10 of this embodiment further includes a polarizing plate 3 directly adhered to the light guide plate 1 and an anti-reflection film 4 formed on the polarizing plate in a manner of covering the polarizing plate 3.

[0038] The light guide sheet 1 has a prism surface layer portion with alternating convex portions and concave portions thereon. In this example, the prism surface layer is partly for...

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Abstract

An object of the invention is to provide a surface illumination device and a display device using it, which can contribute to improvement of display qualities. A surface illumination device 10 comprising a light guide plate 1 for propagating incident light inside itself and reflecting the light at the reflecting prism face 1S to output the light from the light exit face. This further comprises: a polarizing plate 3 provided on the light exit face; and an anti-reflection film 4 provided on the polarizing plate 3. The reflecting prism face 1S extends so that a direction of electric vector's vibration of an s-polarized light component of a reflecting light ray caused by an incident light ray in a predetermined propagation direction is in parallel with a polarization axis of the polarizing plate 3, whereby a light efficiency can be improved.

Description

Technical field [0001] The invention relates to a surface lighting device and a display device using it. [0002] The present invention also relates to such a surface lighting device and a display device using it, which includes a light guide sheet and means for introducing light to the end face of the light guide sheet, wherein the light propagating through the light guide sheet is Guide to the object placed on the lower surface side of the light guide sheet so that the entire oncoming surface of the object is irradiated with light as uniformly as possible. [0003] The present invention also relates to a front light system based on such a surface lighting device and a display device having the front light system, and more particularly to a reflective or transflective liquid crystal display device. Background technique [0004] The reflective or transflective liquid crystal display device has a liquid crystal cell constructed on the basis of mutually opposed substrates with a li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/00F21V8/00F21Y101/02G02F1/1335G02F1/13357
CPCG02F2001/133616G02B6/0038G02B6/0056G02B6/0055G02F1/13362G02F1/133616G02F1/1335
Inventor 津田旭光高桥悟H·P·M·胡克那须康介
Owner KONINK PHILIPS ELECTRONICS NV
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