JP3044137B2 - Color image display - Google Patents

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, for example, a black and white cathode ray tube (hereinafter referred to as "CRT").
The present invention relates to a color image display device that displays a color image using the same.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram showing a conventional image display device using a black and white CRT. In the figure, reference numeral 1 denotes a black and white 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, which are supplied with a horizontal synchronization signal HD and a vertical synchronization signal VD, respectively. Then, these deflection circuits 22 and 23 provide CR
Horizontal and vertical deflection signals are supplied to horizontal and vertical deflection coils (not shown) of T1, respectively.

In the above configuration, in the CRT 1, the electron beam density-modulated by the luminance signal Y is deflected so as to scan the phosphor screen horizontally and vertically by horizontal and vertical deflection signals. 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 apparatus using a black and white CRT is configured as described above, there is a problem that color display cannot be performed and colors cannot be discriminated. .

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and is inexpensive, capable of displaying a color image using a single-color image display element, small in size, and easy to position a mechanism portion. It is an object 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 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 a drive for sequentially switching the color filter portions of the coloring member in accordance with the screen of the image display element Means, and a plurality of color signals respectively corresponding to the respective color filter portions of the coloring member are sequentially written for one field and written.
Each 1-field color signal for 1/3 vertical period
Repeatedly read three times with a period between
A plurality of color signals which are read out from the storage means and which correspond to a color filter portion of the coloring member located on the screen of the image display element from the plurality of color signals. and a signal supply means for supplying to said image display device selects a color signal, using a rotating motor to the drive means, arranged perpendicularly to the axis of the rotary motor on the screen of the image display device, the rotary Wear the motor
The color member rotates once in one vertical period, and rotates with the vertical synchronizing signal.
The rotation is controlled so that the rotation synchronization pulse maintains a constant phase relationship.
That's what I did .

According to a second aspect of the present invention, there is provided a color image display device comprising: a single-color image display element; and at least three types of color filter sections for coloring an image displayed on a screen of the image display element. A coloring member, a driving means for sequentially switching each color filter portion of the coloring member in accordance with the screen of the image display element, and a plurality of color signals corresponding to each color filter portion of the coloring member by one field.
And one field at a time.
Of each of the three color signals with a period of 1/3 vertical period.
Reading repeatedly, and these writing and reading are performed in parallel.
A plurality of color signals read out from the storage means, and a color signal corresponding to a 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 a signal supply unit for supplying the color filter to the image display element. A rotary motor is used as the drive unit, and an axis of the rotary motor is disposed perpendicular to a surface of the color filter unit of the coloring member. The surface of the unit is parallel to the screen of the image display element, and the rotating motor is
The color member rotates once in one vertical period, and rotates with the vertical synchronizing signal.
The rotation is controlled so that the rotation synchronization pulse maintains a constant phase relationship.
That's what I did .

[0008]

[0009]

[0010]

According to the first aspect of the present invention, since the axis of the rotary motor is disposed perpendicular to the screen of the image display device, positioning with respect to other components becomes easy.

According to the second aspect of the present invention, since the surface of the color filter section and the screen of the image display element are made parallel, light from the screen does not refract when passing through the color filter section, so that high image quality is obtained. Is obtained.

[0012]

[0013]

[0014]

[Embodiment 1] FIG. 1 is a configuration diagram showing one embodiment of a color image display device according to the present invention. In the figure, reference numeral 1 denotes a monochrome CRT similar to that in the example of FIG. Further, as shown in FIG. 2, reference numeral 2 denotes a color filter unit FR, FG, or FB that allows light of three colors of red (R), green (G), and blue (B) to pass therethrough.
For example, it is a disk-shaped colored member arranged at an angular interval of 20 °. The center of the coloring member 2 is connected to the motor shaft 3 a of the rotary motor 3, and the coloring member 2 is rotated by the motor 3.

In this case, the motor shaft 3a of the motor 3 is
It is arranged to be perpendicular to the screen (display surface) 1a of T1. In addition, each color filter unit FR, FG, F
B is sequentially arranged on the screen 1a of the CRT 1, and the coloring member 2 is arranged so that the surfaces of the color filters FR, FG, and 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.

The vertical synchronizing signal VD is supplied to the frequency conversion circuit 15, and a signal V3 having a frequency three times the frequency of the vertical synchronizing signal VD output from the frequency conversion circuit 15 is sent to the control device 16 together with the vertical synchronizing signal VD. Supply. Reference numeral 4 denotes a rotation sensor that detects the rotation phase of the coloring member 2, and supplies a rotation synchronization pulse P output from the rotation sensor 4 and indicating the rotation phase of the coloring member 2 to the control device 16. The above-described motor 3 is driven by supplying a rotation drive signal from the control device 16. In this case, the coloring member 2 is 1 in one vertical period.
The control device 16 controls the rotation of the motor 3 so that the motor 3 rotates and the vertical synchronization signal VD and the rotation synchronization pulse P maintain a constant phase relationship.

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

In the storage devices 11 to 13, the supplied color signals SR, SG, and SB are sequentially written one field at a time, and the written color signals SR, SG, and SB for each field are divided by 1 /. Reading is repeated three times with a cycle of three vertical periods, and writing and reading are performed in parallel. Thereby, the storage devices 11 to 1
3, the color signals SR, SG, and SB of the same field are repeated three times at a cycle of 1/3 vertical period.
The double-speed color signals SR3, SG3, and SB3 are obtained.

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

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 units FR, FG, FB on a are selected and supplied to the CRT1.

Further, a signal H3 having a frequency three times the frequency of the horizontal synchronizing signal HD is supplied from the frequency conversion circuit 14 to the horizontal deflection circuit 22, and the frequency conversion circuit 1 is supplied to the vertical deflection circuit 23.
5 supplies a signal V3 having a frequency three times the frequency of the vertical synchronization signal VD. From these deflection circuits 22 and 23, C
It supplies horizontal and vertical deflection signals to horizontal and vertical deflection coils (not shown) of RT1. Thereby, CR
At T1, horizontal and vertical deflection scanning is performed at three times the normal speed.

5A to 5D show the rotational phase of the coloring member 2 and C
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 CRT 1, 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 CRT 1 ends. The supply of the color signal SR3 for one field is started (see A in the figure).

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 after 1/3 vertical period, 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 CRT 1 is terminated, and the supply of the color signal SG3 for one field is started (see FIG. D). FIG. 5 shows the color filter section FR, but the same applies to the other color filter sections FG and FB.

In the above arrangement, the signal switching device 6 sequentially supplies the triple-speed color signals SR3, SG3, and SB3 to the CRT 1, and the CRT 1 performs horizontal and vertical deflection scanning at the triple speed, so that the image is displayed on the screen. 1a, a black-and-white image based on the color signals SR3, SG3 and SB3 is sequentially displayed with a cycle of 1/3 vertical period.

As described above, the signal switching device 6 uses the CRT
1 color filters FR and F of the coloring member 2 on the screen 1a.
Since the color signals SR3, SG3 and SB3 are selected corresponding to G and FB, the color signals SR3, SG3 and SG3 are displayed on the screen 1a.
When an image by SB3 is displayed, screen 1 of CRT1 is displayed.
a, color filter portions FR, F of the coloring member 2
G and FB are located.

For this reason, the color filter portion F of the coloring member 2
A red image, a blue image, and a blue image can be obtained by the color signals SR3, SG3, and SB3 with a 1/3 vertical period cycle through R, FG, and FB.
By looking at the screen 1a of the CRT 1 through the LCD, it is possible to recognize a high-resolution color image as compared with, for example, a liquid crystal display element while maintaining at least the resolution of a black and white CRT.

According to this embodiment, the motor shaft 3 of the motor 3
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 is facilitated. 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 the RT1, FIG.
As shown in (1), the light 1d output from the screen 1a is not refracted when passing through the color filters FR, FG, and FB of the coloring member 2, thereby preventing deterioration in image quality.

Embodiment 2 FIG. In the above embodiment, the coloring member 2 and the motor shaft 3a of the motor 3 are used.
Are directly connected, but can be connected using a belt 7 as shown in FIG. In this case, the motor shaft 3a
Pulley 3c fitted to the shaft and the rotating shaft 2b of the coloring member 2
The belt 7 is mounted between the pulley 2a and the pulley 2a. With such a configuration, the motor 3 can be disposed in an empty space between the CRT 1 and the coloring member 2, so that the size of the apparatus can be reduced, and the vibration of the motor 3 can be applied to the coloring member 2. Transmission can be reduced.

Embodiment 3 FIG. In the above-described embodiment, an example in which a monochrome CRT 1 is used as a single-color image display element has been described. However, the same configuration can be made by using another single-color image display element such as a liquid crystal display element.

[0030]

According to the first aspect of the invention, there is provided a coloring device having a single-color 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 member, driving means for sequentially switching the color filter portions of the coloring member in accordance with the screen of the image display element, and a plurality of color signals respectively corresponding to the color filter portions of the coloring member are sequentially written by one field.
In each case, each of the written color signals for one field
This is repeated three times with a cycle of 1/3 vertical period and read
Storage means for performing writing and reading in parallel, and reading out the plurality of color signals from the storage means, and using the plurality of color signals, a color filter section of the coloring member located on the screen of the image display element. Signal supply means for selecting a color signal corresponding to the image display element and supplying the selected signal to the image display element. A rotary motor is used as the drive means, and an axis of the rotary motor is arranged vertically to a screen of the image display element. ,
The coloring motor makes one rotation of the coloring member in one vertical period.
Vertical sync signal and rotation sync pulse maintain a fixed phase relationship.
The rotation of the coloring member is controlled as follows.
The filter section is sequentially switched to correspond to the screen of the monochrome image display element.
At the same time as this
Color signal corresponding to the color filter
Color by the cooperation of the image display element and the coloring member.
The color images constituting the image are sequentially displayed, and as a result, a high-resolution color image can be displayed, and the axis of the rotating motor is arranged perpendicular to the screen of the image display element, so that positioning with other components is easy. There are effects such as becoming.

According to the second aspect of the invention, there is provided a monochromatic image display element, and a coloring member having at least three types of color filter sections for coloring an image displayed on the screen of the image display element. Driving means for sequentially switching each color filter portion of the coloring member in accordance with the screen of the image display element, and sequentially writing a plurality of color signals respectively corresponding to each color filter portion of the coloring member for one field.
In each of the written color signals for one field,
Is repeated three times with a cycle of 1/3 vertical period
And a storage means for performing the writing and the reading in parallel, and reading out the plurality of color signals from the storage means,
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; Using a rotating motor, the axis of the rotating motor is arranged perpendicular to the surface of the color filter section of the coloring member, the surface of the color filter section is parallel to the screen of the image display element, and the rotating motor is Coloring member is one vertical period
One rotation between the vertical synchronization signal and the rotation synchronization pulse
Since the rotation is controlled so as to maintain a constant phase relationship , a high-resolution color image can be displayed in the same manner as in the first aspect of the present invention, and the surface of the color filter section and the screen of the image display element are not displayed. Since the light is made parallel, the light from the screen is not refracted when passing through the color filter portion, so that high image quality can be obtained.

[0032]

[0033]

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a configuration of a disc-shaped coloring member.

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

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

FIG. 5 is a diagram for explaining the relationship between the rotation phase of the disc-shaped coloring member, the scanning lines of the CRT, and the switching of 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 illustrating an example of a conventional image display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Black-and-white cathode ray tube, 2 disk-shaped coloring members, 3 rotation motors, 4 rotation sensors, 6 signal switching devices, 7 belts, 11-13 video signal storage devices, 14, 15 frequency conversion circuits, 16 control devices, 22 Horizontal deflection circuit, 2
3 Vertical deflection circuit, P rotation synchronization pulse, S switching signal.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 9/16

Claims (2)

(57) [Claims] An image display device of a single color, a coloring member having at least three types of color filter portions for coloring an image displayed on a screen of the image display device, and each color filter portion of the coloring member are Driving means for sequentially switching in accordance with the screen of the image display element; and a plurality of color signals respectively corresponding to the respective color filter portions of the coloring member are sequentially written for one field and written.
Each of the input color signals for one field is divided by 1 /
Repeatedly read three times with a period of three vertical periods,
A storage unit for performing writing and reading in parallel; reading out the plurality of color signals from the storage unit; and reading the plurality of color signals from the plurality of color signals to a color filter unit of the coloring member located on a screen of the image display element. Signal supply means for selecting a corresponding color signal and supplying the selected color signal to the image display element, using a rotary motor for the drive means, disposing an axis of the rotary motor perpendicular to the screen of the image display element , The rotation mode
The coloring member makes one rotation in one vertical period, and
Phase signal and rotation synchronization pulse maintain a constant phase relationship
A color image display device wherein rotation is controlled . 2. A monochromatic image display device, a coloring member having at least three types of color filter portions for coloring an image displayed on a screen of the image display device, and each color filter portion of the coloring member Driving means for sequentially switching in accordance with the screen of the image display element; and a plurality of color signals respectively corresponding to the respective color filter portions of the coloring member are sequentially written for one field and written.
Each of the input color signals for one field is divided by 1 /
Repeatedly read three times with a period of three vertical periods,
A storage unit for performing writing and reading in parallel; reading out the plurality of color signals from the storage unit; and reading the plurality of color signals from the plurality of color signals to a color filter unit of the coloring member located on a screen of the image display element. Signal supply means for selecting a corresponding color signal and supplying the selected color signal to the image display element. A rotary motor is used as the drive means, and the axis of the rotary motor is perpendicular to the surface of the color filter section of the coloring member. The surface of the color filter unit and the screen of the image display element are made parallel to each other, and the rotating motor is turned by the coloring member for one vertical period.
Rotate, and the vertical sync signal and the rotary sync pulse are
A color image display device , wherein rotation is controlled so as to maintain a phase relationship .