JPS58162931A - Transmission type color liquid crystal display - Google Patents

Abstract

PURPOSE:To obtain a distinct contrast, by providing a light emitting body for emitting the light of a necessary color, on each color section of a color displaying pattern, and sticking a multicolor EL light emitting body which prints black to other part than the pattern, to the reverse side of a substrate. CONSTITUTION:To a substrate 1B of the reverse side of a liquid crystal cell 1, a multicolor EL light emitting body 8 is stuck, and color display is executed on a substrate 1A side of the surface by light from the light emitting body 8. This cell has such a quality as it becomes transparent when voltage is applied, and becomes opaque when voltage is not applied. As for the multicolor EL light emitting body 8, on each color section of a color displaying pattern, a light emitting body part for generating the light of a color required for displaying the pattern concerned, respectively is formedin the part corresponding to the pattern area concerned, and a panel face 19 except the light emitting body part is printed in black. The black printed layer prevents scattering of light of the EL light emitting body, also has an effect for increasig a color of the black part of the liquid crystal itself, and a distinct color display can be realized in the daytime, too.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmissive color liquid crystal display device.

First, an example of a conventional transmissive color liquid crystal display tjfIL will be explained based on FIG. Liquid crystal cell 1 is transparent substrate I
A and IB are placed inside each other with a spacer 2 interposed therebetween, and a liquid crystal 7 is housed and held therebetween. liquid crystal cell 10
There are other important components, but they are omitted because they are not directly related to the present invention.

A color film mask 3 is pasted on the outside of the agricultural board 1B, and a light emitting body 5 such as a fluorescent lamp or an incandescent lamp is placed on the outside of the mask 3.
A single film mask 3 is provided with a surface light source consisting of a light scattering reflector 4 and a light guide 6, and a filter is used to transmit only seven colors for each pattern to be displayed on the substrate I. The light from the surface light source is transmitted through the color film mask 3, and the light of the desired color is incident on the desired pattern, thereby making it possible to display the desired color.

As shown in Figure 1, in this liquid crystal display device, the thickness of the surface light source is larger than that of the liquid crystal cell.
I am not satisfied with the thin shape that is moldy. As a method to overcome this drawback, white electroluminescence (hereinafter referred to as ML
It's called Su. ) A method using a light emitter has also been proposed.
The ML emitter has phosphor particles dispersed in a dielectric material and generates fluorescence upon application of an alternating current voltage.

This white RL light emitter expands 6 to 5 foot lamberts (f
L) Only a low volatility can be obtained, and most of this is absorbed while passing through the color filter and liquid crystal cell, so it can be used for practical purposes at night, but during the day, clear colors due to transmitted illumination cannot be obtained. It's hard to get a display.

SUMMARY OF THE INVENTION An object of the present invention is to provide a thin transmissive color liquid crystal display device that is capable of displaying a large number of colors even during the daytime.

In the transmissive color liquid crystal display device according to the present invention, a liquid crystal is housed and held between transparent substrates, light generating means of a plurality of colors is provided outside the back substrate, and a color display is made on the front substrate side. In a transparent color liquid crystal display device, for each color division of a pattern to be displayed in color, a luminous body is provided in a portion corresponding to the pattern area, each of which generates the color contrast necessary to display the pattern. DESCRIPTION OF THE PREFERRED EMBODIMENTS A transparent color liquid crystal device according to the present invention will be described based on drawings showing an embodiment of a transmissive color liquid crystal device of the present invention, in which a multicolor EL emission board is printed in black except for the portion corresponding to the pattern area. 2 is a schematic sectional view of an embodiment of the device of the invention, and FIG. 3 is a plan view of a multicolor KL emitter in the device of FIG. Liquid crystal cell 1 in the device shown in Figure 182
has the same structure as the liquid crystal cell in the device shown in Figure 1,
As in FIG. 1, components not directly related to the present invention are omitted. A multicolor RL light emitter 8 is attached to the front board 1B, and the light from the light emitter 8 illuminates the front board 1A.
1111K color display.

In a transmissive liquid crystal display device, when a voltage is applied, the liquid crystal at the core transmits light from the back side, and a pattern corresponding to the voltage application state is displayed in white on a black background on the front side. Since the multicolor KL light emitter 8 is a surface light source that needs to emit light over almost the entire surface of the liquid crystal cell 1 as shown in the figure, it has a panel shape.

As shown in Figure N6, the multicolor KL light emitter panel 8 has seven color groups necessary to display each pattern in a portion corresponding to the pattern area for each color division of the pattern to be displayed in color. A light emitting body part is formed that emits light. 1! l
The multicolor ML light emitter panel B in Figure IA is an example for a liquid crystal display device used in an automobile instrument panel display. Figure 3 shows each light emitting body part, and the diagonal line on the left is the red light
The diagonal shaded area on the right side generates green light, the area with several dots generates true color vision, and the slightly thick scattered area generates orange light.

9 is an alarm display section, 10 is a direction indicator section, 11 is an hour hand, 12
is the mileage, 13 is the odometer, 14 is the speed bar display,
15 is a speed digital display, 16 is an automatic display, 17 is a fuel, and 18 is a luminous body portion corresponding to a temperature display pattern area.

A multicolor BL light emitter panel is manufactured as follows. That is, first, a transparent electrode made of tin oxide, indium oxide, or the like is deposited on a substrate such as a glass plate or a plastic sheet. On top of that, as a light-emitting layer, a fluorescent material such as Zn8 is coated with Mn (yellow-orange), am (red), TI) depending on the desired emission color.
(edge) and tm (actuality) are sprayed, printed or vapor-deposited into the required shape, and furthermore, a gold maple electrode is formed by using aluminum-lamb # deposition as a negative electrode, and a fat-moisture Manufactured by hardening with Araldite or epoxy IM resin. Panel rfJ19Fi other than the light emitter portion corresponding to each pattern area in FIG. 3 is printed in black.

In the multicolor single light emitter used in the device of the present invention, a relatively high # degree of 40 to 100 fL can be obtained for each color of light. In the device of the present invention, a light emitting body of the desired color is attached to the back side of the pattern to be displayed in color, and unlike conventional devices, a color film mask is not used. It can radiate. Furthermore, it has the effect of increasing the color of the area, and a volatility of 10 to 20 fL can be obtained for each color of each ML light emitter on the surface of the liquid crystal cell, making it possible to display colors with clear contrast even in the daytime. .

[Brief explanation of drawings]

1 is a schematic sectional view showing an example of a conventional transmissive color liquid crystal display device, FIG. 2 is a schematic sectional view of an embodiment of a transmissive color liquid crystal display device of the present invention, and FIG. 83 is a device shown in FIG. 2. FIG. 3 is a plan view of a multicolor MLL light body in FIG. DESCRIPTION OF SYMBOLS 1...Liquid crystal cell, 1 person, 1B...Substrate, 2...Spacer, 3...Color film screen, 4...Light scattering reflector, 5...Light emitter, 6... ...Light guide, T...
LCD, 8...Multicolor KL starting/stopping agent Asamura Kogai 4 people

Claims (1)

[Claims] A transmissive color liquid crystal in which a liquid crystal is housed and held between transparent substrates, light generating means of a plurality of colors is provided on the outside of the back substrate, and color display is performed on the front substrate side. In the display device, for each color division of a pattern to be displayed in color, a light emitting body is provided in a portion corresponding to the pattern area, each of which generates light of a color necessary to display the pattern, Printing other parts in black color [a certain multi-colored electroluminescence luminous material is pasted on Todoroki's board]
Transparent color liquid crystal display device.