JPH0690458A - Color image display device - Google Patents

Abstract

PURPOSE:To display a color image by using a monochrome image display element. CONSTITUTION:1 and 2 are coloring members having a white-and-black CRT and red, green and blue color filter parts at intervals of an angle of 120 deg., respectively. The member 2 is rotated by a motor 3 and the color filter parts of each color are successively located on the screen 1a of a CRT 1. The rotation of the motor 3 is controlled by a controller 16, the member 2 makes a turn for a vertical period, and a vertical synchronizing signal VD and the rotation synchronizing pulse P from a sensor 4 are made to keep a constant phase relation. Triple-speed red, green and blue color signals in which the same field signals are repeated by the cycle of a 1/3 vertical period three times are obtained from storage devices 11 to 13, and the color signals corresponding to the color filter parts on the screen 1a of the CRT 1 are selected by a switching device 6. In the CRT 1, horizontal and vertical deflection scannings are performed by the three times as fast as usual speed. By the coaction of the CRT 1 and the member 2, the red, green and blue images by the red, green and blue color signals can be successively obtained by the cycle of a 1/3 vertical period and the color images can be displayed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monochromatic image display device such as a black and white cathode ray tube (hereinafter referred to as "CRT").
The present invention relates to a color image display device for displaying a color image by using the above.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing a conventional image display device using a monochrome CRT. In the figure, 1 is a monochrome CRT. A luminance signal (black and white video signal) Y is supplied to the CRT 1. Reference numerals 22 and 23 denote a horizontal deflection circuit and a vertical deflection circuit, respectively, to which a horizontal synchronization signal HD and a vertical synchronization signal VD are supplied. Then, from these deflection circuits 22 and 23, CR
Horizontal and vertical deflection signals (not shown) of T1 are supplied with horizontal and vertical deflection signals, respectively.

In the above structure, in the CRT 1, the electron beam density-modulated by the luminance signal Y is deflected by horizontal and vertical deflection signals so as to scan the fluorescent screen horizontally and vertically. Therefore, CRT1
A black-and-white image based on the luminance signal Y is displayed on the screen 1a.

[0004]

Since the conventional image display device using the black and white CRT is configured as described above, there is a problem that it is not possible to display in color and the colors cannot be discriminated. .

The present invention has been made in order to solve such a problem, and it is possible to display a color image by using a monochromatic image display element, which is inexpensive, downsized, and easy to position a mechanical portion. An object of the present invention is to provide a high-resolution color image display device.

[0006]

According to a first aspect of the present invention, there is provided a color image display device comprising: a single color image display element;
A coloring member having at least three kinds of color filter portions for coloring an image displayed on the screen of this image display element, and rotation for sequentially switching each color filter portion of this coloring member corresponding to the screen of the image display element. Driving means, storage means for respectively storing a plurality of color signals corresponding to each color filter portion of the coloring member, and the plurality of color signals are read from the storage means, and the image display element of the image display element is read from the plurality of color signals. Signal supply means for selecting a color signal corresponding to the color filter portion of the coloring member located on the screen and supplying the selected color signal to the image display element.

A color image display device according to a second aspect of the present invention comprises a monochromatic image display element and at least three types of color filter portions for coloring an image displayed on the screen of the image display element. A coloring member having the same, a driving means for sequentially switching each color filter portion of the coloring member corresponding to the screen of the image display element, and a storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member. And reading out the plurality of color signals from the storage means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals to select the image display element. And a signal supply means for supplying to the driving means, a rotary motor is used as the driving means, and the axis of the rotary motor is arranged perpendicularly to the screen of the image display element.

A color image display device according to a third aspect of the present invention comprises a monochromatic image display element and at least three types of color filter portions for coloring an image displayed on the screen of the image display element. A coloring member having the same, a driving means for sequentially switching each color filter portion of the coloring member corresponding to the screen of the image display element, and a storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member. And reading out the plurality of color signals from the storage means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals to select the image display element. And a signal supplying means for supplying to the driving means, a rotary motor is used as the driving means, and the axis of the rotary motor is arranged perpendicular to the surface of the color filter portion of the coloring member. A screen surface and the image display device of the filter unit is obtained by parallel.

According to a fourth aspect of the present invention, there is provided a color image display device including a monochromatic image display element and at least three types of color filter portions for coloring an image displayed on the screen of the image display element. A coloring member having the same, a driving means for sequentially switching the respective color filter portions of the coloring member corresponding to the screen of the image display element, and a storage means for storing a plurality of color signals respectively corresponding to the respective color filter portions of the coloring member. Reading out the plurality of color signals from the storage means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals, and selecting the color signal in the image display element. And a signal supplying means for supplying, a rotary motor is used for the driving means, and a motor shaft of the rotary motor is connected to the coloring member by using a belt.

A color image display device according to a fifth aspect of the present invention includes a monochromatic image display element and at least three types of color filter portions for coloring an image displayed on the screen of the image display element. A coloring member having the same, a driving means for sequentially switching each color filter portion of the coloring member corresponding to the screen of the image display element, and a storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member. And reading out the plurality of color signals from the storage means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals to select the image display element. And a signal supplying means for supplying to the driving means, a rotation motor is used as the driving means, and the motor shaft of the rotation motor is connected to the coloring member by using a belt, Arranged axis of rotation motor perpendicular to the plane of the color filter portion of the colored member is obtained by parallel and screen surface and the image display device of the color filter unit.

[0011]

According to the first aspect of the present invention, the color filter portions of the disk-shaped coloring member are sequentially switched in correspondence with the screen of the monochromatic image display element, and the image display element is positioned on the screen. Since the color signal corresponding to the color filter section is supplied, the color images forming the color image are sequentially displayed by the cooperation of the image display element and the disk-shaped coloring member, and as a result, the color image is displayed. .

According to the second aspect of the invention, a color image is displayed as in the first aspect of the invention, and the axis of the rotary motor is arranged vertically to the screen of the image display element. Positioning with other components becomes easy.

According to the third aspect of the invention, a color image is displayed in the same manner as the first aspect of the invention, and the surface of the color filter portion and the screen of the image display element are parallel to each other. Since the light from the screen is not refracted when passing through the color filter portion, high image quality can be obtained.

In the invention described in claim 4, a color image is displayed as in the invention described in claim 1, and the motor shaft of the rotary motor uses a belt as a disc-shaped coloring member. The transmission of vibrations from the rotary motor to the disk-shaped coloring member can be suppressed, and the rotation motor can be installed in an empty space between the image display element and the rotary shaft of the disk-shaped coloring member. Therefore, the device can be downsized.

In the fifth aspect of the invention, a color image is displayed as in the first aspect of the invention, and the motor shaft of the rotary motor uses a belt as a disc-shaped coloring member. The transmission of vibrations from the rotary motor to the disk-shaped coloring member can be suppressed and the rotation motor can be arranged in an empty space between the image display element and the rotary shaft of the disk-shaped coloring member. Therefore, the device can be downsized, and since the surface of the color filter unit and the screen of the image display element are parallel to each other, light from the screen is not refracted when passing through the color filter unit, resulting in high image quality. Is obtained.

[0016]

EXAMPLES Example 1. FIG. 1 is a block diagram showing an embodiment of a color image display device according to the present invention. In the figure, 1 is a monochrome CRT similar to that in the example of FIG. Further, 2 is, as shown in FIG. 2, the color filter portions FR, FG, and FB, which pass light of three colors of red (R), green (G), and blue (B), have angular intervals of 120 °. For example, it is a disk-shaped coloring member arranged. The center of the coloring member 2 is connected to the motor shaft 3a of the rotary motor 3,
The coloring member 2 is rotated by the motor 3.

In this case, the motor shaft 3a of the motor 3 is CR
It is arranged so as to be perpendicular to the screen (display surface) 1a of T1. Also, as the color filters rotate, the color filter parts FR, FG, F
B is sequentially positioned on the screen 1a of the CRT 1, and the coloring member 2 is arranged such that the surfaces of the color filter portions FR, FG, FB are parallel to the screen 1a of the CRT 1. In addition,
In the figure, 1b indicates a line parallel to the screen 1a,
3b shows the axis of the motor shaft 3a.

Further, the vertical synchronizing signal VD is supplied to the frequency converting circuit 15, and a signal V3 having a frequency three times the vertical synchronizing signal VD output from the frequency converting circuit 15 is supplied to the control device 16 together with the vertical synchronizing signal VD. Supply. A rotation sensor 4 detects the rotation phase of the coloring member 2, and supplies a rotation synchronizing pulse P, which is output from the rotation sensor 4 and indicates the rotation phase of the coloring member 2, to the control device 16. A rotation drive signal is supplied from the control device 16 to the motor 3 described above to drive it. In this case, the coloring member 2 is 1 in one vertical period.
The controller 16 controls the rotation of the motor 3 such that the motor 16 rotates and the vertical synchronizing signal VD and the rotation synchronizing pulse P maintain a constant phase relationship.

Reference numerals 11 to 13 denote video signal storage devices, and the storage devices 11 to 13 respectively have color signals SR of red (R), green (G), and blue (B) which form color video signals. SG and SB are supplied as write signals. The storage devices 11 to 13 are supplied with the horizontal synchronization signal HD and the vertical synchronization signal VD as reference synchronization signals for writing, and the signals H3 and H3 having a frequency three times the horizontal synchronization signal HD output from the frequency conversion circuit 14 are supplied. The signal V3 output from the frequency conversion circuit 15 is supplied as a reference synchronization signal for reading.

In these storage devices 11 to 13, the supplied color signals SR, SG, SB are sequentially written for each one field, and each of the written color signals SR, SG, SB for one field is 1 /. Reading is repeated three times in a cycle of three vertical periods, and writing and reading are performed in parallel. As a result, the storage devices 11 to 1
From 3 onward, the color signals SR, SG and SB of the same field are repeated 3 times at intervals of 1/3 vertical period.
Double-speed color signals SR3, SG3, SB3 are obtained.

3A to 3C show the color signals SR, SG and SB supplied to the storage devices 11 to 13, and FIGS.
C is a color signal SR3 output from the storage devices 11 to 13.
SG3 and SB3 are shown. 3 and 4, the color signals in the same field are shown with the same numbers.

The triple speed color signals SR3, SG3 and SB3 output from the storage devices 11 to 13 are supplied to the signal switching device 6. A switching signal S synchronized with the signal V3 is supplied from the control device 16 to the signal switching device 6, and the screen 1 of the CRT 1 is displayed.
The color signals SR3, SG3, SB3 corresponding to the color filter portions FR, FG, FB on a are selected and supplied to the CRT 1.

Further, the horizontal deflection circuit 22 is supplied with a signal H3 having a frequency three times the horizontal synchronizing signal HD from the frequency conversion circuit 14, and the vertical deflection circuit 23 is supplied with the frequency conversion circuit 1.
5, the signal V3 having a frequency three times the frequency of the vertical synchronizing signal VD is supplied. Then, from these deflection circuits 22 and 23, C
Horizontal and vertical deflection signals are supplied to horizontal and vertical deflection coils (not shown) of RT1. This allows CR
At T1, horizontal and vertical deflection scanning is performed at a speed three times higher than usual.

5A to 5D show the rotation phase and C of the coloring member 2.
The relationship between the scanning line of RT1 and the switching of the signal switching device 6 is shown. That is, the color filter portion F of the coloring member 2
When the boundary between B and FR is located at the center of the screen 1a of the CRT1, the signal switching device 6 is switched to select the color signal SR3, and the supply of the color signal SB3 for one field to the CRT1 is completed. The supply of the color signal SR3 for one field is started (see A in the same figure).

Then, after the 1/3 vertical period, when the boundary between the color filter portions FR and FG of the coloring member 2 is located at the center of the screen 1a of the CRT 1, the signal switching device 6 is switched to select the color signal SG3. , The supply of the color signal SR3 for one field to the CRT1 is finished, and the supply of the color signal SG3 for one field is started (see D in the same figure). Although FIG. 5 shows the color filter portion FR, the same applies to the other color filter portions FG and FB.

In the above structure, the signal switching device 6 sequentially supplies the triple speed color signals SR3, SG3, SB3 to the CRT1 and the horizontal and vertical deflection scanning is performed at the triple speed at the CRT1. A black-and-white image by the color signals SR3, SG3, SB3 is sequentially displayed on 1a in a cycle of 1/3 vertical period.

As described above, in the signal switching device 6, the CRT is used.
Of the colored member 2 on the screen 1a of No. 1
Since the color signals SR3, SG3, SB3 are selected corresponding to G and FB, the color signals SR3, SG3, are displayed on the screen 1a.
When the image by SB3 is displayed, the screen 1 of CRT1
The color filter portions FR and F of the coloring member 2 are provided on a, respectively.
G and FB are located.

Therefore, the color filter portion F of the coloring member 2 is
A red image, a blue image, and a blue image can be obtained by the color signals SR3, SG3, and SB3 through R, FG, and FB with a cycle of 1/3 vertical period, and therefore, the coloring member 2 can be obtained.
By viewing the screen 1a of the CRT 1 via the, it is possible to recognize a color image having a higher resolution than that of, for example, a liquid crystal display device while maintaining the resolution of at least a monochrome CRT.

Further, according to this example, the motor shaft 3 of the motor 3 is
Since a is arranged so as to be perpendicular to the display surface 1a of the CRT 1, there is an advantage that the positioning of the mechanical portion becomes easy. Further, according to this example, the surfaces of the color filter portions FR, FG, FB are C
Since it is arranged so as to be parallel to the screen 1a of RT1,
As shown in FIG. 3, the light 1d output from the screen 1a is not refracted when passing through the color filter portions FR, FG, FB of the coloring member 2, and the deterioration of the image quality can be prevented.

Example 2. In the above-mentioned embodiment, the coloring member 2 and the motor shaft 3a of the motor 3 are directly connected to each other.
Alternatively, the belt 7 may be used for connection as shown in FIG.
In this case, the belt 7 is hung between the pulley 3c fitted to the motor shaft 3a and the pulley 2a fitted to the rotating shaft 2b of the coloring member 2. With this configuration, the motor 3 can be arranged in the vacant space between the CRT 1 and the coloring member 2, so that the device can be downsized, and the vibration of the motor 3 can be changed to the coloring member 2. Transmission can be reduced.

Example 3. In the above embodiment,
Although an example in which a monochrome CRT 1 is used as a monochromatic image display element has been shown, the same configuration can be achieved by using another monochromatic image display element such as a liquid crystal display element.

[0032]

According to the first aspect of the present invention, there is provided a monochromatic image display element and a coloring having at least three kinds of color filter portions for coloring an image displayed on the screen of the image display element. A member, a rotation driving means for sequentially switching each color filter portion of the coloring member corresponding to the screen of the image display element, and a storage means for respectively storing a plurality of color signals corresponding to each color filter portion of the coloring member. ,
The plurality of color signals are read out from the storage means, and a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element is selected from the plurality of color signals and supplied to the image display element. Since each color filter portion of the coloring member is sequentially switched corresponding to the screen of the single-color image display element, the image display element is provided with a color corresponding to the color filter portion located on the screen. Since the signal is supplied, the color images forming the color image are sequentially displayed by the cooperation of the image display element and the coloring member, and as a result, a high-resolution color image can be displayed.

According to the second aspect of the invention, a monochromatic image display element and a coloring member having at least three types of color filter portions for coloring the image displayed on the screen of the image display element. Driving means for sequentially switching the color filter portions of the coloring member corresponding to the screen of the image display element, storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member, and this storage A signal for reading out the plurality of color signals from the means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals, and supplying the selected color signal to the image display element. The same as the invention according to claim 1, further comprising: a supply means, a rotary motor is used as the drive means, and a shaft of the rotary motor is arranged perpendicular to a screen of the image display element. It is possible to display high resolution color images, there is an effect such that it is easy to position the other components since distribution perpendicularly the axis of rotation motor on a screen of the image display device.

According to the third aspect of the invention, a monochromatic image display element and a coloring member having at least three types of color filter portions for coloring the image displayed on the screen of the image display element. Driving means for sequentially switching the color filter portions of the coloring member corresponding to the screen of the image display element, storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member, and this storage A signal for reading out the plurality of color signals from the means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals, and supplying the selected color signal to the image display element. A rotation motor is used for the driving means, the axis of the rotation motor is arranged perpendicular to the surface of the color filter portion of the coloring member, and the surface of the color filter portion and the surface of the color filter portion Since the screen of the image display device is made parallel, a high-resolution color image can be displayed as in the invention according to claim 1, and the surface of the color filter portion and the screen of the image display device are made parallel. Therefore, since the light from the screen is not refracted when passing through the color filter portion, there is an effect that a high image quality can be obtained.

According to the invention described in claim 4, a monochromatic image display element and a coloring member having at least three kinds of color filter portions for coloring an image displayed on the screen of the image display element. Driving means for sequentially switching the color filter portions of the coloring member corresponding to the screen of the image display element, storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member, and the storage means. A signal supply for reading the plurality of color signals from the plurality of color signals, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals, and supplying the selected color signal to the image display element. And a means for driving, wherein a rotary motor is used as the driving means, and the motor shaft of the rotary motor is connected to the coloring member by using a belt, the same as the invention according to claim 1. Color image of high resolution can be displayed,
Further, since the motor shaft of the rotary motor is connected to the coloring member using a belt, transmission of vibrations from the rotary motor to the coloring member can be suppressed, and the rotary motor can be used as the image display element and the rotary shaft of the disc receiver coloring device. It is possible to dispose it in an empty space between and, and it is possible to reduce the size of the device.

According to the invention described in claim 5, a monochromatic image display element and a coloring member having at least three kinds of color filter portions for coloring an image displayed on the screen of the image display element. Driving means for sequentially switching the color filter portions of the coloring member corresponding to the screen of the image display element, storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member, and this storage A signal for reading out the plurality of color signals from the means, selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals, and supplying the selected color signal to the image display element. A rotary motor is used for the driving means, and the motor shaft of the rotary motor is connected to the coloring member by using a belt, and the shaft of the rotary motor is provided. The coloring member is arranged vertically to the surface of the color filter portion, and the surface of the color filter portion and the screen of the image display device are parallel to each other. An image can be displayed, and since the motor shaft of the rotary motor is connected to the coloring member using a belt, transmission of vibrations from the rotary motor to the coloring member can be suppressed, and the rotation motor can rotate the image display element and the coloring member. It can be arranged in an empty space between the shaft and the device, and the size of the device can be reduced. Further, since the surface of the color filter portion and the screen of the image display element are parallel to each other, the light from the screen is filtered. Since there is no refraction when passing through the portion, there is an effect that high image quality can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a color image display device according to the present invention.

FIG. 2 is a diagram showing a configuration of a disk-shaped colored member.

FIG. 3 is a diagram showing an input color signal of a video signal storage device.

FIG. 4 is a diagram showing an output color signal of a video signal storage device.

FIG. 5 is a diagram for explaining the relationship between the rotational phase of the disk-shaped coloring member and the switching of the scanning line of the CRT and the signal switching device.

FIG. 6 is a diagram for explaining an effect of one embodiment.

FIG. 7 is a configuration diagram showing another embodiment of the color image display device according to the present invention.

FIG. 8 is a configuration diagram showing an example of a conventional image display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Black-and-white cathode ray tube 2 Disc-shaped coloring member 3 Rotation motor 4 Rotation sensor 6 Signal switching device 7 Belts 11-13 Video signal storage device 14, 15 Frequency conversion circuit 16 Control device 22 Horizontal deflection circuit 23 Vertical deflection circuit P rotation Sync pulse S switching signal

Claims (5)

[Claims] 1. A monochromatic image display device, a coloring member having at least three types of color filter parts for coloring an image displayed on the screen of the image display device, and each color filter part of the coloring member. Rotational drive means for sequentially switching corresponding to the screen of the image display element, storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member, and reading out the plurality of color signals from the storage means. A signal supply means for selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals and supplying the selected color signal to the image display element. And color image display device. 2. A monochromatic image display element, a coloring member having at least three types of color filter portions for coloring an image displayed on the screen of the image display element, and each color filter portion of the coloring member Driving means for sequentially switching corresponding to the screen of the image display element, storage means for respectively storing a plurality of color signals corresponding to each color filter portion of the coloring member, and reading the plurality of color signals from the storage means, A signal supply means for selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals and supplying the selected color signal to the image display element, and the drive means A color image display device characterized in that a rotary motor is used, and an axis of the rotary motor is arranged vertically to a screen of the image display element. 3. A monochromatic image display device, a coloring member having at least three types of color filter parts for coloring an image displayed on the screen of the image display device, and each color filter part of the coloring member described above. Driving means for sequentially switching corresponding to the screen of the image display element, storage means for respectively storing a plurality of color signals corresponding to each color filter portion of the coloring member, and reading the plurality of color signals from the storage means, A signal supply means for selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals and supplying the selected color signal to the image display element, and the drive means A rotary motor is used, the axis of the rotary motor is arranged perpendicular to the surface of the color filter portion of the coloring member, and the surface of the color filter portion and the screen of the image display element are parallel to each other. Color image display device comprising a. 4. A monochromatic image display element, a coloring member having at least three types of color filter portions for coloring an image displayed on the screen of the image display element, and each color filter portion of the coloring member described above. Driving means for sequentially switching corresponding to the screen of the image display element, storage means for storing a plurality of color signals respectively corresponding to the color filter portions of the coloring member, and reading the plurality of color signals from the storage means, And a signal supply means for selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from a plurality of color signals and supplying the selected color signal to the image display element, and rotating the drive means. A color image display device, characterized in that a motor is used, and a motor shaft of the rotary motor is connected to the coloring member using a belt. 5. A monochromatic image display element, a coloring member having at least three types of color filter portions for coloring an image displayed on the screen of the image display element, and each color filter portion of the coloring member described above. Driving means for sequentially switching corresponding to the screen of the image display element, storage means for respectively storing a plurality of color signals corresponding to each color filter portion of the coloring member, and reading the plurality of color signals from the storage means, A signal supply means for selecting a color signal corresponding to the color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals and supplying the selected color signal to the image display element, and the drive means A rotary motor is used, and the motor shaft of the rotary motor is connected to the coloring member using a belt, and the shaft of the rotary motor is connected to the color filter portion of the coloring member. And a screen of the image display device is parallel to the surface of the color filter section.