JPS60227578A - Display device - Google Patents

Abstract

PURPOSE:To display a color dynamic picture while adding intermediate gradation in a large size display device adopting an optical fiber by applying spatial modulation to a light from a light source and using an optical fiber so as to lead the light subject to spatial modulation to the display panel. CONSTITUTION:The light from a CRT display device 1 displaying a picture is irradiated to a liquid crystal spatial light modulator 2 as a written light and the resistance of optical conductive film is changed. On the other hand, the light from a white light source 4 passes through a lens system 5 and is formed into a parallel light, reflected in a semi-transparent film of a beam splitter 3, read to a liquid crystal layer of the liquid crystal spatial light modulator 2 and irradiated as the light. The irradiated light being a read light is modulated by the liquid crystal tortional nematic effect and the double refraction effect depending on the difference of the resistance of the photoconductive film, then returned to a beam splitter 3 again. The modulated light passes through the splitter 3 and a picture is displayed on a display board 7. The dynamic picture with intermediate gradation is displayed on the display board 7 by allowing the device 1 to control the content of picture image and intermediate gradation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a display device, and more particularly to a large color display device using optical fibers.

[Back claw of invention]

Conventional large display devices using optical fibers illuminate one end of the optical fiber bundle with light from a white light source.
An image is displayed on one display panel by light emitted from the other end face.

Therefore, the displayed image is changed by blocking the light from the white light source in accordance with the displayed content.

Furthermore, the color of one displayed image is changed by attaching a color filter to the white light source. However, there is a drawback that it takes a long time to change the image and color as described above, and therefore it is not possible to display a color moving image with halftones added. Therefore, there is a strong desire for its realization.

[Purpose of the invention]

An object of the present invention is to eliminate such conventional drawbacks and provide a display device that can display color moving images and express halftones on a large display that uses optical fibers.

"Summary of the Invention" To achieve the above object, the display device of the present invention is a display device equipped with an optical fiber for transmitting image light to a display panel, in which light from a light source is spatially transmitted using an image signal to be displayed. It is characterized in that it includes a spatial light modulator for modulating, and an optical fiber for guiding the spatially modulated light by the spatial light modulator to a display panel.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration block diagram of a display device showing one embodiment of the present invention.

In FIG. 1, 1 is a CRT display device for creating image content to be displayed, and 2 is an optical input type liquid crystal spatial light modulator that optically inputs the image of the CRT display device 1 and outputs the displayed image to an optical fiber. The device 3 deflects the incident light using a semi-transparent film. In other words, a beam splitter having the function of a deflection prism, 4 a white light source for displaying an image, 5 a lens system for converting the light from the white light source 4 into parallel light, and 6
1 is an optical fiber bundle, and 7 is a display board that displays an image using light emitted from the optical fiber bundle 6.

In order to display high-quality images without distortion, etc., 1)
By using the CR7 display device 1 with a flat screen or by inserting an optical fiber array or lens system between the CR7 display device 1 and the liquid crystal spatial light modulator 2, parallel light can be created (beam splitter 3 and The same applies to the arrayed end faces of the optical fiber bundle 6). 11) Divide the other end of the optical fiber bundle 6 whose one end is in an array shape and in contact with the beam splitter 3 to match the shape and dimensions of the display panel 7 while maintaining the positional relationship between both ends. and fix it to the panel surface. 111) Process the ends of the optical fibers that are divided and fixed to the display panel 7 so that they have a diffusion that matches the display area of the display device.

As the white light source 4, a tungsten or halogen bulb, or a xenon or mercury lamp that emits discharge light is used.

Light from the CR7 display device 1 displaying an image is irradiated onto the liquid crystal spatial light modulator 2 as writing light to change the resistance of the photoconductive film. On the other hand, the light from the white light source 4 is transmitted to the lens system 5.
It becomes parallel light, is reflected by the semi-transparent film of the beam splitter 3, and is irradiated to the liquid crystal layer of the liquid crystal spatial light modulator 2 as read light.

The irradiation light, which is the readout light, is modulated by the twisted nematic effect and birefringence effect of the liquid crystal according to the difference in resistance of the photoconductive film, and then returns to the beam splitter 3 (for example, .No,
I2. (1982) 1068 (28) -107
(See page 5 (35)).

The modulated light passes through the beam splinter 3, illuminates the arrayed end face of the optical fiber bundle 6, passes through the optical fiber bundle 6, and displays an image on the display panel 7. Therefore, by controlling the image content and halftones by the CR7 display device 1, a moving image with halftones can be displayed on the display board 7.

Note that when displaying binary images such as characters and symbols, use the liquid crystal spatial light modulator 2 instead of using the CRT display device.
into an electrical input type CCD/CD/liquid crystal optical spatial light modulator,
Electrical signals can be directly input and displayed in the same manner as described above. Further, as an alternative to the CR7 display device 1 and the liquid crystal spatial light modulator 2, a Titus tube that irradiates a DKDP crystal with an electron beam to form a charge image can be used.

FIG. 2 is a configuration block diagram of a color display device showing an embodiment of the present invention, and FIG. 3 is a diagram showing the arrangement of optical fibers and emitted light colors in the display panel of FIG. 2.

In FIGS. 2 and 3, 8, 9, and 10 are color filters for red, green, and blue, respectively; 11 is a color display plate; and 12 is a light emitting point on the end face of the optical fiber bundle 6.

As shown in FIG. 2, the color display device includes three color filters 8, 9, and 10 inserted between the beam splitter 3 shown in FIG. 1 and the array end face of the optical fiber bundle 6. In other words, it incorporates filters for the three primary colors of light: red, green, and blue. The display surface of the display board 11 that performs color display has a large number of pixels each consisting of three light emitting points 12 of red, green, and blue arranged as shown in FIG.

With the R (red), G (green), and B (blue) signals input to the CRT display devices t, i', and i', the white light sources 4 and 4
'.

4″ light is modulated, and the modulated light is connected to the optical fiber bundle 6.
By passing the light and emitting light from each light emitting point 12 of the display board 11, a color moving image can be displayed with halftones visible.

[Effects of the Invention] As described above, according to the present invention, a color moving image can be displayed with halftones added on a large display employing optical fibers.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the configuration of a display device showing an embodiment of the present invention, Fig. 2 is a block diagram of the structure of a color display device showing an embodiment of the invention, and Fig. 3 shows optical fibers and FIG. 3 is a diagram showing the arrangement of emitted light colors. 1, ], ', 1'': CRT display device, 2.
2', 2'': Liquid crystal spatial light modulator, 3.3', 3'':
Beam Sublissota, 4.4', 4': White light source, J
15'IJ": Lens system, 6.6', 6": Optical fiber bundle, 7: Display board, 8 to lO: Color filter, 11: Color display board, 12: Light emitting point. Patent applicant Mitsubishi Rayon Co., Ltd. Agent Patent attorney Masaaki Isomura Patent Application No. 84269 of 1984 2 Title of the invention Display device 3 Relationship with the case of the person making the amendment Patent applicant 4, attorney 5, 宕 Number of inventions increased by the amendment None 1) Page 3 of the specification In lines 15 and 16, "a beam splitter that deflects ... with a semitransparent film, that is, a beam splitter that has the function of a deflection prism" is changed to "a beam splitter that deflects ... in a right-angled direction with a semitransparent film." Correct to. (2) On page 4 of the specification, lines 1 to 4, "In order to display high-quality images without distortion, etc., 1) the screen should be flat between the CR7 display device 1 and the liquid crystal spatial light modulator 2. Use CR7 display device 1. Or optical fiber array...
・"In order to display high-quality images without distortion, etc., 1) use a CRT display device with a flat screen. Alternatively, install an optical fiber between the CR7 display device 1 and the liquid crystal spatial light modulator 2.・Array...'' is corrected. (3) Correct (replace) Figure 1 as shown in the attached sheet.

Claims (2)

[Claims] (1) In a display device equipped with an optical fiber for guiding image light to a display panel, the spatial light modulating means spatially modulates the light from the light source with an image signal to be displayed, and the spatial light modulating means spatially modulates the light from the light source with an image signal to be displayed. A display device comprising an optical fiber for guiding light to a display panel. (2) The spatial light modulation means and the optical fiber are
Claim 1 characterized in that only the primary colors are provided.
Display device as described in Section 1.