Lighting device, display device, and television receiver

A technology for a lighting device and a display device, which is applied in the fields of display devices, television receivers, and lighting devices, and can solve the problems of increasing brightness, increasing the number of light sources, increasing power consumption, etc., achieving good visual recognition, suppressing uneven display, good display effect

Inactive Publication Date: 2012-04-18
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the number of light sources is increased, the cost of the backlight unit increases and power consumption also increases
In addition, when the diffusion degree of the diffusion plate is increased, the brightness cannot be increased, and there is also a problem that the number of light sources still needs to be increased.

Method used

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  • Lighting device, display device, and television receiver
  • Lighting device, display device, and television receiver
  • Lighting device, display device, and television receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0081] use Figure 1 to Figure 10 Embodiment 1 of the present invention will be described.

[0082] First, the configuration of a television receiver TV including a liquid crystal display device 10 will be described.

[0083] Such as figure 1 As shown, the television receiver TV according to the present embodiment is configured to include a liquid crystal display device 10 , front and rear cabinets Ca and Cb for accommodating the liquid crystal display device 10 , a power supply P, a tuner T, and a stand S. The liquid crystal display device (display device) 10 has a horizontally long square shape as a whole, and is housed in a vertical state. Such as figure 2 As shown, the liquid crystal display device 10 includes a liquid crystal panel 11 as a display panel and a backlight device (illumination device) 12 as an external light source, and these are integrally held by a frame-shaped outer frame 13 or the like.

[0084] Next, the liquid crystal panel 11 and the backlight un...

Embodiment approach 2

[0141] Use below Figure 17 to Figure 20 Embodiment 2 of the present invention will be described. In this Embodiment 2, the arrangement|positioning pattern of a light source is changed from Embodiment 1, and it is the same as that of Embodiment 1 above other than that. The same reference numerals are assigned to the same parts as those in Embodiment 1 above, and overlapping descriptions will be omitted.

[0142] Figure 17 is a plan view showing a schematic configuration of a chassis included in a backlight unit, Figure 18 It is a schematic diagram showing the arrangement pattern of the light reflection part formed on the surface facing the cold cathode tube in the diffuser plate, Figure 19 is showing Figure 18 The coordinate diagram of the light reflectance of the E-E' line of the diffuser plate, Figure 20 is showing Figure 18 Graph of the variation of light reflectance on the F-F' line of the diffuser plate. In addition, in Figure 19 In , the horizontal axis sh...

Embodiment approach 3

[0153] Use below Figure 21 to Figure 25 Embodiment 3 of the present invention will be described. In this Embodiment 3, the configuration pattern of the light source is further changed from that of Embodiment 1, and the rest is the same as that of Embodiment 1 described above. The same reference numerals are assigned to the same parts as those in Embodiment 1 above, and overlapping descriptions will be omitted.

[0154] Figure 21 is an exploded perspective view showing a schematic configuration of a liquid crystal display device, Figure 22 is a schematic plan view of a base showing an arrangement pattern of LED light sources, Figure 23 It is a schematic diagram showing the arrangement pattern of the light reflection part formed on the surface facing the LED light source in the diffuser plate, Figure 24 is a graph showing the light reflectance of the G-G' line of the diffuser plate, Figure 25 It is a graph showing the light reflectance of the J-J' line of the diffuser...

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Abstract

Provided is a lighting device which makes it possible to obtain a nearly uniform light brightness distribution with no local dark patches. A lighting device (12) is provided with a light source (17) of elongate shape, a chassis (14) which houses the light source (17) and has an aperture part (14b) for emitting the light of the light source (17), and an optical member (15a) which is arranged opposite the light source (17) and shaped to cover the aperture part (14b). The optical member (15a) has a different light reflectance in each region along the lengthwise direction of the light source (17).

Description

technical field [0001] The present invention relates to an illuminating device, a display device and a television receiving device. Background technique [0002] For example, a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light by itself, so a backlight device is additionally required as an illumination device. It is known that the backlight device is arranged on the back side (the side opposite to the display surface) of the liquid crystal panel, and is provided with: a base with openings on the side of the liquid crystal panel; a plurality of light sources (such as cold cathode tubes), which are used as lamps housed in the chassis; and an optical component (diffuser plate, etc.) disposed in the opening of the chassis for efficiently emitting light generated by the light source to the liquid crystal panel side. [0003] When the light source emits linear light, such a backlight device is configured to conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00G02F1/1333G02F1/13357F21Y101/02F21Y103/00
CPCG02F1/133604G02F1/133606G02F1/133605G02F1/133611
Inventor 黑水泰守
Owner SHARP KK
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