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Backlight device and liquid crystal display apparatus

A backlight device and light source technology, applied in lighting and heating equipment, mechanical equipment, lighting devices, etc., can solve problems such as the deterioration of brightness and color uniformity, and achieve the effects of reducing distribution, improving brightness uniformity, and increasing luminosity

Inactive Publication Date: 2006-09-13
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As described above, in the case where an LED is used as a light source of a backlight device, when the LED is arranged directly under the light-emitting surface, that is, when a direct type LED is used, since the LED is a point light source, brightness and color uniformity May get worse

Method used

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  • Backlight device and liquid crystal display apparatus
  • Backlight device and liquid crystal display apparatus
  • Backlight device and liquid crystal display apparatus

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Embodiment Construction

[0030] Thereafter, preferred embodiments for realizing the present invention will be explained, however, the present invention is not limited to the following embodiments.

[0031] First, refer to figure 1 A schematic configuration diagram of FIG. 1 is used to explain an embodiment of a transmissive LCD device to which the backlight device according to the present invention is suitably applied.

[0032] Such as figure 1 As shown, the transmissive LCD device 200 includes a transmissive LCD panel 100 and a backlight 10 disposed on the rear surface side thereof. Although not shown in the figure, the LCD device 200 may further include: a receiving section that receives terrestrial waves or satellite waves, such as an analog tuner or a digital tuner; video and audio signals received by the receiving section are respectively processed a video signal processing section and an audio processing section; and an audio signal output section, such as a speaker, that outputs the audio sig...

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Abstract

A liquid crystal display apparatus including a direct backlight device which has an LED assembled into a light-guiding plate and in which an brightness uniformity is controlled or improved is provided by controlling or improving the brightness uniformity. A backlight device 10 includes a light emitting diode 21 as a light source assembled into a light-guiding plate 30, in which an edge portion 32 on the bottom surface 30B side of a concave portion 31 in a light-guiding plate 30, where the light emitting diode 21 is assembled, is formed at to have the shape of an inclined or curved surface that has an angle except a right angle with respect to the bottom surface 30B.

Description

technical field [0001] The invention relates to a backlight device and a liquid crystal display device, in particular, the backlight device is suitable for being applied to a transmissive liquid crystal display device. Background technique [0002] Recently, very thinly manufactured display devices such as liquid crystal displays (LCDs), plasma display panels (PDPs), etc. have been proposed as display devices to replace cathode ray tubes (CRTs) for television receivers and are commercially available get. In particular, since LCD devices using LCD panels can be driven with low power consumption, and large-sized LCD panels have become able to be manufactured at low cost, LCD devices using LCD panels have been widely used and technology development has been advanced. . [0003] The above LCD device mainly uses a backlight system in which a color image is displayed by backlighting the entire backside of a transmissive LCD panel including color filters from the backside. [00...

Claims

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Application Information

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IPC IPC(8): G02F1/13357G02F1/133H01L33/00G02F1/1335F21S2/00F21V8/00F21Y101/02
CPCG02B6/0068G02F1/133603G02B6/0021A47G1/12
Inventor 青木富雄
Owner SONY CORP
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