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Backlight device and color liquid crystal display apparatus

A technology for backlight devices and liquid crystal display panels, applied in lighting devices, fixed lighting devices, optics, etc., can solve the problem that the color reproduction range is not wide enough, etc.

Active Publication Date: 2009-07-01
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, there is a problem that the color reproduction range of a color liquid crystal display device using a light emitting diode as a light source is not wide enough to satisfy the color reproduction range provided by the NTDC system.

Method used

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

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Embodiment Construction

[0073] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to the presently described embodiments and can be arbitrarily modified without departing from the scope of the present invention.

[0074] The present invention is suitable for example Figure 4 A color liquid crystal display device 100 of the configuration shown.

[0075] In this figure, a transmissive color liquid crystal display device 100 is composed of a transmissive color liquid crystal display panel 10 and a backlight unit 40 provided on the back of the color liquid crystal display panel 10 . The transmissive color liquid crystal display device 100 is equipped with a receiving unit for receiving ground waves or satellite waves, such as an analog tuner or a digital tuner (not shown), for processing image signals or audio signals received by these receiving units. An image processing u...

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Abstract

The present invention provides a backlight device used in a color liquid crystal display device (LCD). The backlight device generates white light by mixing red light, green light and blue light emitted by a light source. The light source includes a red light-emitting diode (21R) emitting red light with a half-value width hwr of 15nm≤hwr≤30nm, and an emitting half-value width hwg. A green light-emitting diode (21G) that emits green light with a range of 25nm≤hwg≤50nm and a blue-light emitting diode that emits blue light with a half-value width hwb of 15nm≤hwb≤30nm (21B). White light is applied from the back side of a transmissive color liquid crystal display panel (10) including a color filter (19) having three primary color filters for wavelength-selectively transmitting red, green, and blue light. .

Description

[0001] Cross References to Related Applications [0002] This application claims priority based on Japanese Patent Applications Nos. 2004-238787, 2004-238789, and 2005-075500 filed in Japan on August 18, 2004, August 18, 2004, and March 16, 2005, respectively. The contents of these patent applications are incorporated in this application by reference. technical field [0003] The present invention relates to a color liquid crystal display (LCD) device, and more particularly, to a color liquid crystal display device having a wider color gamut to ensure more reliable color reproduction performance. Background technique [0004] Very thin TV receivers, such as those using a liquid crystal display (LCD) or plasma display panel (PDP), have been developed and brought into practical use to replace the cathode ray tubes that have long been used since the beginning of TV broadcasting (CRT) TV receiver. In particular, color liquid crystal display devices using color liquid crystal d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357F21S2/00F21S8/00
Inventor 芳贺秀一柿沼孝一郎中枝武弘松本达彦田川康弘太田温奥贵司新井健雄
Owner SONY CORP
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