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Lighting device, display device, and television receiving device

A technology for lighting devices and display devices, which is applied in the direction of circuits, electrical components, and electric solid devices, and can solve problems such as floating of reflectors and degradation of display performance of backlight devices, and achieve the effect of suppressing floating

Inactive Publication Date: 2014-12-24
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the backlight unit described in Patent Document 1, the heat generated near the LED light source, the positional deviation of the reflection sheet, etc. may cause a part of the reflection sheet to float.
In this case, the light from the LED light source is blocked by the reflective sheet, and the display performance of the backlight unit may decrease.

Method used

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  • Lighting device, display device, and television receiving device
  • Lighting device, display device, and television receiving device
  • Lighting device, display device, and television receiving device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] Embodiment 1 will be described with reference to the drawings. In addition, an X axis, a Y axis, and a Z axis are shown in a part of each drawing, and each axis direction is described as a common direction in each drawing. Wherein, the Y-axis direction is consistent with the vertical direction, and the X-axis direction is consistent with the horizontal direction.

[0039] figure 1 An exploded perspective view of the television receiver TV of the first embodiment is shown. Such as figure 1 As shown, the television receiver TV includes: a liquid crystal display device 10; two front and rear cabinets Ca, Cb sandwiching and storing the liquid crystal display device 10; a power supply P; a tuner T; The liquid crystal display device 10 has a horizontally long square shape as a whole, and is housed in a vertical state.

[0040] figure 2 An exploded perspective view of the liquid crystal display device 10 is shown. image 3 A cross-sectional view in the vertical direct...

Embodiment approach 2

[0059] Embodiment 2 will be described with reference to the drawings. Figure 6 It is a cross-sectional view of the reflective sheet 126 and the LED light source 128 arranged on the front side of the LED substrate 130 according to the second embodiment, and shows the difference with that of the first embodiment. Figure 5 corresponding figure. The height of the legs 131a, 131b of the LED light source 128 of the second embodiment is different from that of the first embodiment. The other configurations are the same as those in Embodiment 1, and therefore descriptions of the configurations, operations, and effects are omitted. In addition, in Figure 6 in, yes Figure 5 The parts to which the numeral 100 is added are the same as those described in the first embodiment.

[0060] In the backlight unit according to Embodiment 2, the leg portions 131 a and 131 b of the LED light sources 128 are provided so as to have substantially the same height as the thickness of the reflectio...

Embodiment approach 3

[0062] Embodiment 3 will be described with reference to the drawings. Figure 7 It is a cross-sectional view of the reflective sheet 226 and the LED light source 228 arranged on the front side of the LED substrate 230 according to the third embodiment, and shows the difference with that of the first embodiment. Figure 5 corresponding figure. Embodiment 2 differs from Embodiment 1 in that no leg portion is provided in the LED light source 228 and a cutout 228b is provided in the side surface of the LED light source. The other configurations are the same as those in Embodiment 1, and therefore descriptions of the configurations, operations, and effects are omitted. In addition, in Figure 7 in, yes Figure 5 The portions to which the numeral 200 is added are the same as those described in the first embodiment.

[0063] In the backlight device according to Embodiment 3, the LED light sources 228 are not provided with legs, and the LED light sources 228 are directly mounted o...

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PUM

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Abstract

A technology to suppress or prevent an uplift of a reflection sheet included in a direct type lighting unit is provided. A direct type backlight unit according to the present invention includes an LED board 30, an LED 28 arranged on a surface of the LED board 30, a reflection sheet 26 arranged on the surface of the LED board 30. The reflection sheet 26 has a through hole 27 through which the LED 28 is passed. The reflection sheet 26 is arranged such that a part 26a of a periphery 27a of the through hole 27 is located between a light emitting surface 28a of the LED 28 and the LED board 30.

Description

technical field [0001] The present invention relates to an illuminating device, a display device and a television receiving device. Background technique [0002] In recent years, the display elements of image display devices represented by television receivers have been continuously developed from the conventional Braun tubes to thin display devices using thin display elements such as liquid crystal panels and plasma display panels, which can realize the thinning of image display devices . Since the liquid crystal panel used in the liquid crystal display device does not emit light itself, it additionally needs a backlight device as an illuminating device. [0003] As a backlight device, a direct type backlight device that directly supplies light to a liquid crystal panel from the rear surface is known. In this backlight device, a reflective sheet may be arranged on a substrate on which light sources such as LEDs are arranged. [0004] Patent Document 1 discloses a direct ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357
CPCG02F1/133603G02F1/133605H01L25/0753H01L33/60H01L2224/95H01L2924/0002H01L2924/00
Inventor 镰田健太郎
Owner SHARP KK