JPS6118274A - Fluorescent liquid crystal television set - Google Patents

Abstract

PURPOSE:To obtain a light picture plane by using an ultraviolet ray to stimulate and light a three-color fluorescent body. CONSTITUTION:When no voltage is applied to a light control liquid crystal layer 3, the polarized plane of the stimulated light from a light source 1 is rotated by 90 deg. by the liquid crystal and the light does not transmit through a photodetecting filter 4, and when a voltage is applied, the stimulated light transmits through the filter 4 to stimulate and light the fluorescent body 5 for the part. Thus, a color image by fluorescent luminescence is obtained by controlling the voltage applied position of a liquid crystal light bulb comprising a polarized optical filter 2, a liquid crystal layer 3 and the photodetecting filter 4 with a TV signal.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to liquid crystal televisions, especially bright color televisions (prior art) Televisions with liquid crystal display screens instead of cathode ray tubes can easily be made large in area and have low consumption. It has the special feature of being an electric power source, and efforts are being made to turn it into color.

This colorization is performed by R%G for each valley pixel in contact with the liquid crystal display surface.
It is a mosaic arrangement of three SB color filters, and methods such as changing the color by changing the voltage applied to the liquid crystal have not been successful.

However, the method using a filter is
Since colors are displayed by absorbing colors, the light transmittance is only about 30. Moreover, since a polarizing filter is used in a liquid crystal display, there is a problem in that the display surface is clear and the colors are unclear.

(Objective of the Invention) This invention aims to obtain a liquid crystal color television with bright and clear colors while maintaining the characteristics of large screen display and low power consumption.

(Detection of the invention) The color television of this invention uses ultraviolet rays as a light source, especially 2
00nps to 400nm ■ Using ultraviolet 111jl, R,
The three-color phosphor of B%G is excited to emit light by this ultraviolet light, and this excitation light is controlled by a liquid crystal.

The figure is a conceptual diagram of the configuration of a color television according to the present invention.
is an ultraviolet light source such as a mercury lamp. Excitation light from a light source 1 is polarized by a polarizing filter 2 made of a polymer film, and enters a liquid crystal layer 3 for light control. The liquid crystal used in the light control liquid crystal layer 3 may be, for example, a rice mineral type, and electrodes for dispersion control are formed on both sides of the liquid crystal using a transparent special film such as a NESA film, as is well known.

4 is an analytical filter, and when the control liquid crystal layer 3 rotates the splint plane of the incident light by 90 rotations, the polarization plane is set to 1,000 lines with the polarization plane of the polarization filter 2, which is a so-called forward-niffle arrangement. Ru. Reference numeral 5 is a fluorescent material, and dots corresponding to the three colors R, G, and H are formed for each valley image.

Excitation light from the optical gap When no voltage (for example, 1 m 1 K) 1z) is applied to the light control liquid crystal 1-, the polarization plane is rotated by 90 degrees by the liquid crystal and cannot pass through the analysis filter 4, and the voltage is applied. When it passes through the analytical filter 4, it excites the fluorophore in that area.For this reason, as is well known, the liquid crystal light consisting of a polarizing filter, a liquid crystal layer, and an analytical filter is By controlling the voltage application position of the bulb, a color array due to fluorescent light emission can be obtained.

(Effect of the invention).

Since this invention has the above-mentioned configuration, it does not lose the features of LCD televisions, such as large area display and low power consumption, and the emission energy of fluorescent light reaches about 50 times that of excitation light.
Due to colorization, the O energy loss is considerably smaller than that of a single filter type, and a bright screen can be obtained. Furthermore, the three primary colors produced by fluorescent light are much more pure than those produced by filters, so it is possible to obtain vivid colors.

Furthermore, compared to conventional LCD color televisions, it has the advantage of being easier to put into practical use because the signal processing, etc., are exactly the same except for the light source and color filter.

[Brief explanation of drawings]

The drawing is a conceptual diagram showing the configuration of one example of the liquid crystal color television of the present invention. 1: Light source 2: Polarizing filter 3 Two light control river liquid crystal rt
lj4: tA optical filter 5: Fluorescent special housing applicant
Koa Sankyo Co., Ltd. Applicant Agent Patent Attorney Takumi Fumi Fuji (and 1 other person)
name) engraving of the drawing (no changes to the content) Figure 1 + Supplementary Inspection Rei Yoke ÷ Earth and Churei Percentage Director-General' Jishika Gakuden 1, * Y + υ display Patent Application No. 137895 of 1982 2, Name of the invention: Fluorescent LCD TV 3, Patent applicant address: Qr No. 19, Shiba 5-29, Minato-ku, Tokyo Name:
Father t! Representative of M Eimi Shikikai Suzuki 4, agent 〒105

Claims (1)

[Claims] An ultraviolet light source, a light valve in which a liquid crystal layer for controlling light transmittance according to a television signal is arranged between a polarizing filter and an analysis filter, R for each pixel that is excited by ultraviolet light from the liquid crystal light valve and emits light; Fluorescent LCD TV consisting of fluorescent bodies arranged to correspond to the three colors G and B