JPH04122912A - Color liquid crystal display device - Google Patents

Abstract

PURPOSE:To reduce the thickness of the color liquid crystal display device and to make a plane display thin by arranging a fluorescent tube on the same plane with the color liquid crystal panel. CONSTITUTION:The fluorescent tube 5 is arranged on the same plane with the color liquid crystal panel 1 and the light of the fluorescent tube 5 is converged by a light convergence pat 8 and guided by an optical waveguide part 9 to a reflecting plate 6 to irradiate the color liquid crystal panel 1 uniformly through a diffusion plate 7. Then the LSI 4 of an HIC substrate 3 which is connected to the color liquid crystal panel 1 drives the color liquid crystal panel 1 to control the quantity of transmitted light. Consequently, the plane display can be made thick nearly to 10 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color liquid crystal display device, and more particularly to an improvement in the structure of a backlight for a color liquid panel.

[Conventional technology]

Conventionally, this type of color liquid crystal display device connects an HIC board 3 on which an LSI 4 is mounted to the edge of a color liquid crystal panel 1 by extending it laterally, as shown in FIG.
The fluorescent tube 5 is disposed toward the back surface of the color liquid crystal panel 1, a reflection plate 6 is provided toward the back surface of the fluorescent tube 5, and a diffuser plate 7 is further provided between the fluorescent tube 5 and the color liquid crystal panel 1. are doing.

The operation of the color liquid crystal display device having such a structure is to turn on the fluorescent tube 5, reflect the light from the fluorescent tube 5 on the reflection plate 6, diffuse it on the diffuser plate 7, and irradiate it onto the color liquid crystal panel 1. This is done by driving the liquid crystal panel 1 and controlling the amount of light transmitted from the fluorescent tubes 5.

[Problem to be solved by the invention]

The conventional color liquid crystal display device described above has fluorescent tubes 5 disposed on the back side of the color liquid crystal panel 1, a reflector 6 on the back side of the fluorescent tubes 5, and a space between the fluorescent tubes 5 and the color liquid crystal panel 1. Since the diffuser plate 7 is provided, the total thickness is 25 m to 35 m+n, which is problematic as it becomes thick as a flat display.

[Means to solve the problem]

The present invention provides a color liquid crystal display device having a backlight, in which the backlight has fluorescent tubes disposed on the same plane as the color liquid crystal panel, a light condensing section that condenses the light of the fluorescent tubes, and a guide that guides the condensed light. It includes a light section, a reflector that reflects the guided light, and a diffuser that diffuses the reflected light.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of a color liquid crystal display device according to a first embodiment of the present invention. In the color liquid crystal display device of this embodiment, the fluorescent tubes 5 are arranged on the same plane as the color liquid crystal panel 1, the light from the fluorescent tubes 5 is condensed by the condensing section 8, and the condensed light is transmitted to the light guiding section. The light is guided to a reflection plate 6, and is uniformly irradiated onto the color liquid crystal panel 1 by a diffusion plate 7. And the L of the HIC board 3 that is not connected to the color liquid crystal panel 1.
A color liquid crystal display device is realized by driving the color liquid crystal panel 1 using the SI 4 and controlling the amount of transmitted light.

According to this embodiment, since the fluorescent tubes 5 and the color liquid crystal panel 1 are disposed on the same plane, the thickness of the color liquid crystal display device can be reduced by about 10 mm, which makes it possible to reduce the thickness of the color liquid crystal display device by about 10 mm. It becomes possible to create a model.

FIG. 2 is a sectional view showing a second embodiment of the invention. In this embodiment, two fluorescent tubes 5 are arranged on the same plane on both sides of a color liquid crystal panel, and two sets of light condensing parts 8 and light guide parts 9 are provided respectively, thereby increasing the thickness of the flat display. This doubles the amount of transmitted light and provides a brighter screen.

〔Effect of the invention〕

As explained above, the present invention arranges fluorescent tubes on the same plane as a color liquid crystal panel, and includes a light condensing section that condenses the light from the fluorescent tubes, a light guide section that guides the condensed light, and a light guide section that guides the condensed light. Since the irradiation light source section is composed of a reflector that reflects and a diffuser that diffuses the reflected light, the thickness of the flat display can be reduced to 10 m.
It has the effect of being made as thin as 100 m.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing a second embodiment of the invention, and FIG. 3 is a longitudinal sectional view showing a conventional color liquid crystal display device. It is a diagram. 1.1. Color liquid crystal panel, 3... HIC board, 4...
... LSI, 5. Fluorescent tube, 6. Reflection plate, 7. Diffusion plate, 8. Light condensing section, 9. Light guiding section.

Claims (1)

[Claims] In a color liquid crystal display device that incorporates a color liquid crystal panel, a driving element for driving the color liquid crystal panel, and a backlight for the color liquid crystal panel, the backlight for the color liquid crystal panel and the fluorescent tube are placed on the same plane as the color liquid crystal panel. It consists of a condensing part that condenses the light from the fluorescent tube, a light guide part that guides the condensed light, a reflector that reflects the guided light, and a diffuser that diffuses the reflected light. A color liquid crystal display device characterized by: