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Illumination device and display device

A technology for lighting devices and display areas, which is applied to lighting devices, lighting device parts, lighting and heating equipment, etc., can solve problems such as the reduction of brightness of convex parts, and achieve the effect of suppressing uneven brightness and uniform lighting

Inactive Publication Date: 2016-05-11
SAKAI DISPLAY PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] As for the convex part that engages with the concave part of the light guide plate, since the convex part blocks light, there is a problem that the brightness near the convex part decreases

Method used

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  • Illumination device and display device
  • Illumination device and display device
  • Illumination device and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0065] figure 1 It is an exploded perspective view schematically showing the configuration of the display device 1 according to Embodiment 1 of the present invention.

[0066] figure 2 as well as image 3 It is a horizontal cross-sectional view and a front view schematically showing the structure of the display device 1 near the cover portion 26 .

[0067] The display device 1 of the present embodiment is, for example, a television receiver, an electronic billboard, or a display for a personal computer.

[0068] First, the configuration of the display device 1 will be described.

[0069] The display device 1 has a display panel 11, a bezel 12, a P frame (panel support portion) 13, a backlight unit (illumination device) 2, and an unillustrated case that accommodates these components while exposing a display area 111 described later. Wait.

[0070] A liquid crystal display panel is used for the display panel 11 . Display panel 11 has a rectangular shape and is arranged in...

Embodiment approach 2

[0123] Figure 4 It is a horizontal cross-sectional view schematically showing the structure around the cover portion 26 included in the display device 1 according to Embodiment 2 of the present invention. Figure 4 with Embodiment 1 figure 2 Corresponding.

[0124] The display device 1 of the present embodiment has substantially the same configuration as the display device 1 of the first embodiment. In the following description, differences from Embodiment 1 will be described, and parts corresponding to Embodiment 1 will be given the same reference numerals and descriptions thereof will be omitted.

[0125] The display device 1 of the present embodiment has a narrower frame than the display device 1 of the first embodiment. Therefore, as in Embodiment 1, frame region 112 of display panel 11 is positioned on the front side of front frame portion 131 of P frame 13 , but display region 111 and frame region 112 of display panel 11 are positioned on the front side of each rece...

Embodiment approach 3

[0128] Figure 5 It is a horizontal cross-sectional view schematically showing the structure around the cover portion 26 included in the display device 1 according to Embodiment 3 of the present invention. Figure 5 with Embodiment 1 figure 2 Corresponding.

[0129] The display device 1 of the present embodiment has substantially the same configuration as the display device 1 of the first embodiment. Differences from Embodiment 1 will be described below, and parts corresponding to Embodiment 1 will be assigned the same reference numerals and description thereof will be omitted.

[0130] The P frame 13 of this embodiment is black (or gray). When the P frame 13 is black (or gray), each covering portion 26 is also black (or gray). The black (or gray) covering portion 26 has higher light-shielding properties than the case where the covering portion 26 is white.

[0131] The cover base end portion 262 of the cover portion 26 is located on the rear side of the frame region 112...

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PUM

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Abstract

Provided are an illumination device and display device capable of even illumination. A positioning recess (225) provided in a light guide plate (22) and a portion in the periphery of the recess (225) are covered by a cover (26) from one surface side of the light-guide plate (22). As a result, the cover (26) suppresses the emission of light emitted from the vicinity of the recess (225) on the one surface of the light guide plate (22) onto the outer portion of a backlight unit (2) that functions as an illumination device. Thus, even if light is scattered at the recess (225) of the light guide plate (22) and the brightness of the vicinity of the recess (225) is greater than the brightness of other portions, the leaking of excessively bright light onto the outer portion of the backlight unit (2) (in this case, the side of a display panel (11)) is suppressed. That is, brightness unevenness caused by the recess (225) of the light guide plate (22) is suppressed.

Description

technical field [0001] The present invention relates to a lighting device and a display device having a light guide plate positioned by engagement of concave and convex. Background technique [0002] The liquid crystal display device includes a liquid crystal display panel for displaying images, and a backlight unit for illuminating the liquid crystal display panel from the rear side of the liquid crystal display panel. [0003] Next, a case where the liquid crystal display panel is arranged in an upright posture will be described. [0004] Conventionally, an edge-light type backlight unit has been proposed (see Patent Document 1). The edge-light type backlight unit has a rectangular light guide plate arranged via an optical sheet group on the back side of the liquid crystal display panel, a reflective sheet is arranged on the back side of the light guide plate, and the light source unit is arranged opposite to the lower end surface of the light guide plate. [0005] The l...

Claims

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Application Information

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IPC IPC(8): F21K9/20F21V17/00G02B6/00G02F1/1333G02F1/13357F21Y115/10
CPCG02B6/0088G02B6/002G02B6/0055
Inventor 杉本有正
Owner SAKAI DISPLAY PROD
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