JPH0358017A - Color display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a color display device that combines a liquid crystal shutter and an optical fiber.

(Prior Art) Conventionally, in a display device using a liquid crystal cell, a plurality of liquid crystal shutters are provided in the liquid crystal cell in a dot pattern, and each liquid crystal shutter is driven according to an image signal to display a desired image. It is known that
The arrangement of each liquid crystal shutter of the liquid crystal cell is the same as the display dots of the display section, and an image is formed on the liquid crystal cell. It is also possible to enlarge the displayed image using an optical fiber or the like.

[Problem to be solved by the invention]

A color display device using a conventional liquid crystal cell is configured as described above, and an optical fiber is required for each liquid crystal shutter, which increases the number of optical fibers and requires miniaturization.
Weight saving. It is not possible to reduce costs, it is not possible to obtain a bright display image with high brightness, and the image must be formed on the liquid crystal cell, so the arrangement of the liquid crystal shutters cannot be selected, and the liquid crystal cell There was a problem that the terminal arrangement became complicated.

This invention was made to solve these problems. It uses fewer optical fibers, can be made smaller, lighter, and less expensive, and can provide high-brightness and bright display images. Another object of the present invention is to obtain a color display device in which the arrangement of liquid crystal shutters can be selected.

[Means to solve the problem]

The color display device of this invention is constructed as follows.

a. Red, I! , A liquid crystal cell is provided with a plurality of sets of liquid crystal shutters each having a built-in transparent color filter of the three primary colors of blue and each having an independently controlled amount of transmitted light, and a white light source is placed behind this liquid crystal cell. , one end of a plurality of optical fibers is fixed on the front surface of the liquid crystal cell at a position where light from the set of liquid crystal shutters can enter, a display section is formed on the other end side of each optical fiber, and the liquid crystal cell is A desired image is displayed on the display section by controlling each liquid crystal shutter.

b. In the color display device of item a above, a ferroelectric liquid crystal was used in the liquid crystal cell.

(Function) In the color display device of the present invention, a plurality of sets of red, green, and blue liquid crystal shutters are arranged in a plurality of liquid crystal cells, and an optical fiber is provided for each set to connect it to the display section. Since the number of optical fibers is reduced and thick optical fibers are used, a bright display image can be obtained, and there is no need to form an image on a liquid crystal cell.

〔Example〕

FIG. 1 is a block diagram showing the main parts of a color display device according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a white light source housed in a lamp house 2, which is placed behind a liquid crystal cell 3. The liquid crystal cell 3 has built-in transparent color filters for the three primary colors of R (red), G (green), and B (blue), and has a plurality of sets of liquid crystal shutters 4 arranged in which the amount of transmitted light is independently controlled. It has been done. On the front surface of this liquid crystal cell 3, one end of a plurality of optical fibers 5 is connected to the set of liquid crystal shutters 4.
Each is fixed at a position where it can receive light from
A fiber display section 6 consisting of a plurality of display dots 7 is formed on the other side of each optical fiber 5. Further, a driving IC 8 connected to a control circuit (not shown) through a connector 9 is attached to the liquid crystal cell 3, and each liquid crystal shutter 4 is controlled via this driving IC 8, so that the display screen 6 The desired full color image is displayed in dots. Note that the liquid crystal cell 3 uses ferroelectric liquid crystal. FIG. 2 is a diagram of the display section 6 viewed from the front. As shown in the figure, each display dot 7 has R, G. End face 5a of thick optical fiber 5 that guides light from one set of liquid crystal shutters 4 in B
are fixed, and the display dots 7 are arranged so that an optical image is formed by the display dots 6.

Further, FIG. 3 shows the structure of the liquid crystal cell 3.

As described above, the liquid crystal shutters 4 of each set are arranged in a dot pattern, but the arrangement of the liquid crystal shutters 4 does not necessarily have to be the same as the arrangement of the display dots 7 of the display section 6.

Next, the operation will be explained.

When the light emitted from the white light source 1 passes through each set of liquid crystal shutters 4 made of ferroelectric liquid crystal, it is divided into R, G, and B light by each color filter, and at the same time, the transmittance of each shutter is The amount of light is controlled accordingly. These R, G, and H lights are guided to each display dot 7 of the display unit 6 by the same optical fiber 5 for each set, and are mixed within the display dot 7 to form an optical image. At that time, each of the liquid crystal shutters 4 is controlled from an external control circuit via the driving IC 8, and the control signal (image signal) from the control circuit is a video signal or an output signal from a microcomputer, etc. depending on the application. selected. Further, by increasing the interval between display dots 7, an enlarged image can be easily obtained.

Here, since each optical fiber 5 simultaneously sends the light from a set of liquid crystal shutters 4 that combine the three colors of R, G, and B to the display section 6, the number of fibers is greater than the conventional case where the light is sent individually. is reduced to 1/3, making it smaller and lighter. In addition to being able to reduce costs, since the thick optical fiber 5 is used, there is little light diffusion, and a high-intensity and bright display image can be obtained, and since the R, G, and B lights are close to each other, a good display image can be obtained. A mixed color effect can be obtained. In addition, by selecting the white light source 1 with high luminous intensity, a high-brightness display screen can be easily obtained, and since the display dots 7 can be seamlessly continued on the display section 6, a large display with no clutter can be obtained. You can easily get the screen. Furthermore, the combination of the optical fiber 5 and the liquid crystal shutter 4 does not cause any aberrations, and the combination of the optical fiber 5 and the R, G.
Since the H shutters are in one-to-one correspondence with the set of liquid crystal shutters 4, there is no possibility of display C blurring, and a clear enlarged image can be displayed.

In addition, since there is no need to compose an image on the liquid crystal cell 3,
The arrangement of the liquid crystal shutters 4 can be freely selected depending on, for example, the terminal arrangement of the driving IC 8, and the terminal arrangement of the liquid crystal cell 3 can be simplified.

In the above embodiment, since a ferroelectric liquid crystal with a fast response speed is used for the liquid crystal cell 3, the liquid crystal shutter 4 can be opened and closed at high speed. Since it can be changed, high-quality images can be obtained if it is suitable for television display.

(Effects of the Invention) As described above, according to the present invention, a plurality of sets of R, G, and B liquid crystal shutters are arranged in a plurality of sets of liquid crystal cells, and an optical fiber is provided for each set to connect it to the display section. This reduces the number of optical fibers and makes it more compact. Weight saving. In addition to being able to reduce costs, the use of thick optical fibers allows for high brightness and bright display images, and the ability to select the arrangement of the liquid crystals makes it possible to simplify the terminal arrangement of the liquid crystal cells. There is an effect. Furthermore, by using ferroelectric liquid crystal, the liquid crystal shutter can be opened and closed at high speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a front view of the display section of FIG. 1 seen from the front, and FIG. 3 is a block diagram of the liquid crystal cell of FIG. 1. 1-one white light source 2-one lamp house 3--liquid crystal cell 4--11 sets of liquid crystal shutters 5--one optical fiber 5a-one end surface 6--fiber display section 7--one display dot 8・11 drive IC 9--connector

Claims (2)

[Claims] (1) A liquid crystal cell is equipped with multiple sets of liquid crystal shutters that contain transparent color filters for the three primary colors of red, green, and blue, and the amount of transmitted light is independently controlled. In addition to arranging a white light source, one end of a plurality of optical fibers is fixed in front of the liquid crystal cell at a position where light from the set of liquid crystal shutters can be incident, and a display section is provided on the other end side of each optical fiber. A color display device characterized in that a desired image is displayed on a display section by controlling each liquid crystal shutter of the liquid crystal cell. (2) The color display device according to claim 1, wherein a ferroelectric liquid crystal is used for the liquid crystal cell.