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Spread illuminating apparatus adapted to allow light to exit out from both surfaces of light conductive plate

A technology for lighting devices and light guide plates, applied to lighting devices, devices that make medicines into special physical or ingestible forms, light guides, etc., can solve problems such as waste, uneven brightness of LCD panels, etc., and achieve increased brightness and enhanced reliability. Visibility, the effect of reducing brightness unevenness

Inactive Publication Date: 2008-07-23
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the light emitted from the light source 1 is wasted in the non-display area Y, thereby causing uneven brightness on the LCD panel 7A

Method used

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  • Spread illuminating apparatus adapted to allow light to exit out from both surfaces of light conductive plate
  • Spread illuminating apparatus adapted to allow light to exit out from both surfaces of light conductive plate
  • Spread illuminating apparatus adapted to allow light to exit out from both surfaces of light conductive plate

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Embodiment Construction

[0017] The following will refer to Figure 1A and 1B A first embodiment of the present invention is described. The light guide plate 11 has an end face provided with a plurality of (four in the figure) light sources 1, such as light-emitting diodes (LEDs), through which the light emitted by the light source passes. The light guide plate 11 also has two main surfaces, specifically That is to say, the first main surface 90 and the second main surface 91 , the light entering the light guide plate 1 respectively exits toward two objects to be illuminated (not shown) through the two main surfaces. An optical sheet unit composed of the diffusion sheet 30 and the light collection sheets 40, 41 is provided on at least the second main surface 91 to cover the entire area thereof. On the top of the optical sheet unit, a reflective sheet 2 with an area smaller than the second main surface 91 is placed as a reflective device. Thus, the optical sheet unit not only covers the area Z throu...

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Abstract

A spread illuminating apparatus for illuminating two objects includes: at least one light source; a light conductive plate having the at least one light source at an end surface thereof and defining first and second major surfaces from which light emitted from the at least one light source and introduced in the light conductive plate exits out respectively toward two objects to be illuminated; an optical sheet unit consisting of a diffuser sheet and condenser sheets, and disposed on at least the second major surface so as to cover an entire area thereof; and a reflecting means having a smaller surface area than the second major surface, and disposed directly on top of the optical sheet unit.

Description

technical field [0001] The present invention relates to an extended lighting device, and more particularly to an extended lighting device in which light is emitted from both main surfaces of a light guide plate. Background technique [0002] There has been a continuing need for a display device having two video screens positioned parallel to each other sandwiching a lighting device, which facilitates when a teacher, instructor or salesperson operates an electronic device such as a laptop computer, while It is used in the case where students or customers watch the displayed image at the same time. Figure 10 is a cross-sectional view of a conventional display device for a notebook computer, and the introduction answers the previous request. Such a display device is disclosed, for example, in Japanese Laid-Open Patent Application JP-H10-90678. [0003] see Figure 10 , the display device is foldably connected to the notebook computer. The display device includes: a backlight...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02F1/13357F21V8/00G02F1/1333F21Y101/02G06F1/16H01P5/00
CPCG06F1/1637G06F1/1616G06F1/1647G02F1/133615G02F2001/133342G02F1/133342A61J3/00A61J7/0076
Inventor 水谷仁
Owner MINEBEA CO LTD