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Lighting device, display device and television receiver

A technology of lighting device and light source, applied in the fields of lighting device, display device and TV receiving device, can solve the problems of thermal expansion of light guide plate, uneven brightness of light guide plate, thermal shrinkage, etc., and achieve the effect of brightness stabilization

Inactive Publication Date: 2011-11-30
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the backlight unit configured as above, when the LEDs are turned on or off, the temperature environment inside the backlight unit changes, and accordingly, thermal expansion or contraction occurs in the light guide plate.
At this time, when the light guide plate thermally expands or contracts, sometimes the positional relationship between the light source and the light incident surface changes. In this case, the following results may be brought about: the efficiency of the light emitted from the LED entering the light incident surface and the light from the The efficiency of the light output surface changes, and the brightness of the light guide plate becomes uneven

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

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Embodiment approach 1

[0045] according to Figure 1 to Figure 6 Embodiment 1 of the present invention will be described. In this embodiment, a liquid crystal display device 10 is exemplified. In addition, X-axis, Y-axis, and Z-axis are shown in a part of each drawing, and the direction of each axis is drawn as the direction shown 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. In addition, unless otherwise specified, descriptions about up and down are based on the vertical direction. Additionally, the figure 2 The upper side shown is the front side, and the lower side in the figure is the back side.

[0046] The television receiver TV of this embodiment is such as figure 1 As shown, it includes a liquid crystal display device 10 (display device), two front and back cabinets Ca, Cb for storing the liquid crystal display device 10, a power supply P, and a tuner T. The display surface...

Embodiment approach 2

[0083] according to Figure 7 or Figure 8 Embodiment 2 of the present invention will be described. In this Embodiment 2, the case where the guide mechanism of the support member 20A and the base 14A is changed is shown. In this second embodiment, the same reference numerals are used for the same parts as those in the first embodiment described above, and an additional letter A is added at the end thereof, and redundant descriptions of the structures, operations, and effects are omitted.

[0084] Support member 20A such as Figure 7 As shown, it includes a main body portion 21A formed in a crank shape when viewed from the side, and an extension portion 22A protruding from an end portion of the main body portion 21A. The main body portion 21A includes: a pair of horizontal plate portions 21aA, 21bA along the Z-axis direction; and a vertical plate portion 21cA connecting ends of the two horizontal plate portions 21aA, 21bA and extending along the Y-axis direction. Among them...

Embodiment approach 3

[0088] according to Figure 9 or Figure 10 Embodiment 3 of the present invention will be described. In this Embodiment 3, the fixed position of the light guide plate 18B, the number of installations of the follower mechanism, etc. are changed. In this third embodiment, the same reference numerals are used at the same parts as those in the first embodiment described above, and an additional letter B is added at the end thereof, and repeated descriptions of the structures, operations, and effects are omitted.

[0089] Fixed protrusion 18dB as Figure 9 As shown, fixing holes 14eB for receiving the fixing protrusions 18dB are formed in both short side plates 14cB of the base 14B at approximately the center in the vertical direction of both short side surfaces of the light guide plate 18B. Therefore, when the light guide plate 18B thermally expands or contracts, the vertical upper surface (light incident surface 18bUB) and lower surface (light incident surface 18bDB) of the li...

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Abstract

A backlight device (12) is provided with: an LED unit (17); a light guide plate (18), which has a light incoming surface (18b) arranged to face the LED unit (17), and a light outgoing surface (18a) which is arranged parallel to the arrangement direction (Y axis direction) of the LED unit (17) and the light incoming surface (18b) and outputs light; and a follow-up mechanism which moves the LED unit (17U) in the arrangement direction corresponding to deformation of the light guide plate (18). The follow-up mechanism has a supporting member (20) which supports an LED unit (17U), and the supporting member (20) abuts on the surface which is parallel to the light incoming surface (18bU) of the light guide plate (18).

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 transitioned from the existing Bryan tubes to thin display devices using thin display elements such as liquid crystal panels and plasma display panels, making image display devices thinner. become possible. For the liquid crystal display device, the liquid crystal panel used therein does not emit light, therefore, a backlight device as an illuminating device is additionally required. [0003] As an example for realizing thinning of a liquid crystal display device, a device described in Patent Document 1 below is known. This device is provided with: LED, and it has the light-emitting surface that emits light to the direction substantially parallel with the display surface of liquid crystal panel; The light-incid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00G02F1/13357F21Y101/02
CPCG02F1/133615G02F2001/133314G02B6/0068G02F1/133621G02F1/133308G02B6/0091G02F1/133314
Inventor 林启二
Owner SHARP KK
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