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Lighting device, display apparatus, and television receiving equipment

A technology for lighting devices and display devices, applied in the fields of display devices, television receivers, and lighting devices, can solve the problems of increased cost of backlight source devices, inability to increase brightness, and increased number of light sources, etc., so as to improve visual recognition and visual recognition. Excellent effect

Inactive Publication Date: 2012-05-16
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 still a problem that the number of light sources needs to be increased.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0072] use Figure 1 to Figure 11 Embodiment 1 of the present invention will be described.

[0073] First, the configuration of a television receiver TV including a liquid crystal display device 10 will be described.

[0074] Such as figure 1 As shown, the television receiver TV of the present embodiment is configured to include: a liquid crystal display device 10, two front and back cabinets Ca, Cb for accommodating the liquid crystal display device 10 so as to sandwich the liquid crystal display device 10, a power supply P, and a tuner. T and pedestal S. The liquid crystal display device (display device) 10 has a horizontally long rectangular shape as a whole, and is housed in a vertical state. Such as figure 2 As shown, this 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.

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Embodiment approach 2

[0119] Next, use Figure 16 and Figure 17 Embodiment 2 of the present invention will be described. In this second embodiment, the configuration of the light source is changed from that of the first embodiment, and the rest are the same as those of the above-mentioned first embodiment. The same reference numerals are assigned to the same parts as those in Embodiment 1 above, and overlapping descriptions will be omitted.

[0120] Figure 16 is a plan view showing a schematic configuration of a chassis included in the backlight unit, Figure 18 It is a schematic diagram showing the arrangement form of the light reflection part formed on the surface of the diffuser plate facing the cold cathode tubes.

[0121] The cold-cathode tubes 70 are elongated tubes with a diameter of 4.0 mm, and are arranged parallel to each other in a plurality (here, six) in a state where the longitudinal direction (axial direction) is consistent with the long-side direction of the base 14. The stat...

Embodiment approach 3

[0129] Next, use Figure 18 to Figure 20 Embodiment 3 of the present invention will be described. In this Embodiment 3, the disposition form of the light source is further changed from that of Embodiment 1, and the others are the same as those 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.

[0130] Figure 18 is an exploded perspective view showing a schematic configuration of a liquid crystal display device, Figure 19 It is a schematic plan view of a base showing an arrangement form of an LED light source, Figure 20 It is a schematic diagram showing the arrangement form of the light reflection part formed on the surface facing the LED light source in the diffuser plate.

[0131] Such as Figure 18 As shown, an LED substrate 81 is arranged on the inner surface side of the bottom plate 33 of the chassis 14 , and an LED light source (light source) 80 ...

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Abstract

Disclosed is a lighting device which achieves an increase in the luminance of an intended region such as the central portion of an irradiation surface. Specifically disclosed is a lighting device (12) characterized by being provided with a light source (17), a chassis (14) housing the light source (17), and an optical member (15a) facing the light source (17), wherein the optical member (15a) comprises a light source overlap portion (DA) overlapping with a light source disposition region (LA), in which the light source (17) is disposed, of the chassis (14), and a light source nonoverlap portion (DN) overlapping with a light source nondisposition region (LN) in which the light source (17) is not disposed, the light source overlap portion (DA) has a relatively higher light reflectivity in the surface thereof facing the light source (17) than the light source nonoverlap portion (DN), and the light source overlap portion (DA) includes a low light reflectivity region (LR) having a relatively lower light reflectivity in the surface thereof facing the light source (17) than regions therearound within the light source overlap portion (DA).

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, since a liquid crystal panel used in a liquid crystal display device such as a liquid crystal television does not emit light by itself, a backlight device is separately required as an illuminating 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, which has an opening on the side of the liquid crystal panel; a plurality of light sources (such as cold cathode tubes), whose It is accommodated in the chassis as a lamp, and an optical member (diffuser plate, etc.) is arranged in the opening of the chassis to efficiently radiate light from the light source to the liquid crystal panel side. [0003] Such a backlight device is configured such that when the light source emits linear lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00G02F1/13357F21Y101/02F21Y103/00
CPCG02F1/133606G02F1/133604G02F1/133603G02F1/133611G02F2001/133628G02F1/133605G02F1/133602G02F1/133628
Inventor 横田匡史
Owner SHARP KK
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