JPH11285022A - Cathode ray tube display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the cathode ray tube display device where failure in eyesight due to age is corrected and a video image easily and visually recognized by the aged person is reproduced. SOLUTION: The display device is provided with a contour correction circuit 1 that corrects a contour based on a contour correction signal and with a video amplifier circuit 2 that changes an amplification factor of a color signal based on a color correction signal. Then a contour correction signal and a color correction signal are generated based on each parameter stored in a storage circuit 6 and fed to the contour correction circuit 1 and the video amplifier circuit 2. A level of the contour correction signal and the color correction signal is adjusted by a control circuit 4 and then failure in eyesight due to age is properly corrected and a video image easily seen by the aged person is reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube display device capable of compensating for deterioration of visual function due to aging and reproducing an image which is easy for an elderly person to visually recognize.

[0002]

2. Description of the Related Art It is well known that the visual function generally decreases with aging, and it has been found that, in particular, the yellowing of the crystalline lens of the eyeball causes the entire body to appear biased toward a yellow system. Also, a phenomenon occurs in which the outline looks blurred due to a change in the psychophysical transmission characteristics of the cerebral nervous system from the retina.

[0003] Therefore, for an elderly person whose visual function has deteriorated due to aging, the same phenomenon may occur even when a so-called television receiver or a display image such as a computer graphic is visually recognized. This is unavoidable reality.

Generally, in a television receiver or the like using a cathode ray tube, a special color adjustment knob (potentiometer) is arranged to adjust the degree of reproduction of each of R, G, and B color signals. The color tone can be adjusted by adjusting these.

It is also known that a sharpness adjustment knob (potentiometer) for adjusting the degree of contour correction of an image is provided.

[0006]

Therefore, it is not impossible that the above-described R, G, and B color adjustment knobs are operated to adjust the color balance so that an optimal color balance is obtained for the viewer. Similarly, it is not impossible to operate the sharpness adjustment knob to further enhance the outline of the reproduced image and reproduce the image.

However, for example, in order to obtain an optimum color balance, it is necessary to adjust the R, G, and B color adjustment knobs independently, and the adjustment operation is extremely complicated. As everyone has experienced. Therefore, it is generally not easy for most unskilled aged people to operate them to obtain an optimal color balance, and in short, it is impossible.

It is also known that the above-mentioned decline in visual function gradually progresses with aging, and the degree of the decrease in visual function varies from individual to individual. Therefore, the color balance must be adjusted each time. It can be said that it is practically impossible to fix it.

That is, these adjustment knobs, which are arranged in the current television receivers and the like, are not originally provided as functions that can be adjusted in response to the deterioration of the visual function with aging. There is absolutely no way to use.

[0010] The present invention has been made in view of such circumstances, and compensates for deterioration of visual function due to aging,
It is an object of the present invention to provide a cathode ray tube display device capable of easily reproducing an image which is easy for an elderly person to visually recognize.

[0011]

According to a first aspect of the present invention, there is provided a cathode ray tube display device for emphasizing and correcting an outline of an image in an input image signal in accordance with a first control signal. A contour correction circuit capable of amplifying a video signal contour-corrected by the contour correction circuit and changing an amplification degree of a color signal according to a second control signal; A cathode ray tube that reproduces an image based on an image signal provided by an amplifier circuit, a parameter for generating a first control signal to be applied to the contour correction circuit, and a second control signal to be applied to the image amplifier circuit And a contour correction circuit and a video amplifier based on each parameter stored in the storage circuit in accordance with a command from the correction selection circuit. Respectively road first and second
And a control circuit for supplying the control signal of

Further, a cathode ray tube display according to the present invention comprises:
In addition, there are provided a video generation circuit for generating a plurality of test video signals to be supplied to the cathode ray tube, and a video selection circuit for selectively selecting a plurality of test video signals obtained from the video generation circuit. The first and second control signals corresponding to the test video signal selected by the video selection circuit are stored so as to be retrievable by a command from the correction selection circuit.

In this case, it is preferable that the correction selection circuit is provided with an operation switch capable of calling first and second control signals respectively supplied to the contour correction circuit and the video amplifier circuit.

In a preferred embodiment,
The first control signal supplied to the video amplifier circuit is configured to vary a blue component. Further, as another preferred embodiment, a first amplifier provided to the video amplifier circuit is provided.
Is configured to vary the red component and the green component according to the control signal.

Further, as the plurality of test video signals provided from the video generation circuit, a plurality of video signals of which color signals are gradually changed and a plurality of video signals of which the degree of contour of the video is gradually changed are used. You.

According to the cathode ray tube display device constructed as described above, the control circuit instructs the contour correction circuit and the video amplifier circuit based on each parameter stored in the storage circuit in accordance with a command from the correction selection circuit. They serve to supply first and second control signals, respectively.

In this case, an appropriate preset contour control signal (first control signal) is supplied to the contour correction circuit, and the video reproduced by the cathode ray tube is subjected to contour enhancement correction. At the same time, a control signal (second control signal) for providing a predetermined appropriate amplification degree of the color signal is supplied to the video amplifier circuit, and color correction is performed on the video reproduced by the cathode ray tube.

Therefore, it is possible to correct the deterioration of the visual function due to aging as described above, and to reproduce an image which is easy for the elderly to see.

In addition, the video selection circuit includes a video generation circuit for generating a plurality of test video signals, and a video selection circuit for selectively selecting a plurality of test video signals obtained from the video generation circuit. Means for storing the first and second control signals corresponding to the test video signal selected by the command from the correction selection circuit so as to be retrievable, so that the visual function gradually progresses with aging. In accordance with the decrease, it is possible to easily perform the optimum correction setting, and it is also possible to easily set the correction value according to the individual difference.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cathode ray tube display according to the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention. Reference numeral 1 denotes an outline correction circuit. The contour correction circuit 1 is provided with an input terminal 1a for a video signal, and has a function of enhancing the contour of the video in the video signal input to the input terminal 1a with a first control signal, that is, a contour correction signal. I have.

The video signal whose contour has been corrected by the contour correction circuit 1 amplifies the video signal and changes the degree of amplification of the color signal by a second control signal, ie, a color correction signal. Supplied to Then, the video signal amplified by the video amplifier circuit 2 is supplied to a cathode ray tube (CRT) 3, where the video is reproduced as is well known.

On the other hand, the contour correction circuit 1 and the video amplification circuit 2 are supplied with a contour correction signal as a first control signal and a color correction signal as a second control signal from the control circuit 4, respectively. Is configured. The control circuit 4 is connected to a correction selection circuit 5 and a storage circuit 6. The storage circuit 6 has parameters for generating a contour correction signal to be supplied to the contour correction circuit 1 and colors to be supplied to the video amplification circuit 2. Parameters for setting the correction signal are stored.

By operating the correction selection circuit 5, the control circuit 4 generates an outline correction signal from the parameters for obtaining the outline stored in the storage circuit 6 and supplies it to the outline correction circuit 1. . At the same time, the control circuit 4 is configured to generate a color correction signal from the parameters for obtaining the color correction signal stored in the storage circuit 6 and to supply the color correction signal to the video amplification circuit 2.

FIG. 3 schematically shows the arrangement of operation switches provided in the correction selection circuit 5. That is, the correction selection circuit 5 includes an operation switch N that is selected when a normal user who has no visual function troubles uses it.
And operation switches M1, M2, and M3 that are selected when a user who has advanced visual impairment uses it. Each of the switches M1, M2, and M3 can be set to a degree of correction in accordance with the degree of visual function impairment, and may be assigned to each user and used.

The operation switches N and M
1, M2, and M3, preset voltages Vsn, Vs1, Vs2, and Vs3 for contour correction and preset voltages Vcn, Vc1, Vc2 for color correction set in correspondence with the respective operation switches. Vc
3 are output and supplied to the control circuit 4 respectively.

FIG. 4 shows the parameters for contour correction stored in the storage circuit 6 in the form of a graph in the XY coordinate format. That is, the horizontal axis (X axis) shows the set value corresponding to the preset voltage, and the vertical axis (Y axis)
The axis indicates the level of the contour correction signal. Therefore, by selecting the set value on the horizontal axis, the (level) of the contour correction signal is read from this parameter.

Therefore, by operating each of the operation switches N, M1, M2, M3 in the correction selection circuit 5, the corresponding voltage values Vsn, Vs1, Vs2, Vs
s3 is supplied to the storage circuit 6 via the control circuit 4, and the contour correction signal corresponding to this voltage value can be read.

FIG. 5 is a graph showing parameters for color correction stored in the storage circuit 6 in the form of an XY coordinate format. That is, the horizontal axis (X axis) shows the set value corresponding to the preset voltage, and the vertical axis (Y axis)
In particular, the axis (axis) shows the correction level of the blue signal. Therefore, by selecting the set value on the horizontal axis, a color correction signal (a level indicating the degree of amplification of blue) is obtained from this parameter.
Is read out.

Therefore, by operating each of the operation switches N, M1, M2, M3 in the correction selection circuit 5, the corresponding voltage values Vcn, Vc1, Vc2, Vc
c3 is supplied to the storage circuit 6 via the control circuit 4, and a color correction signal for controlling the blue amplification corresponding to the voltage value can be read.

The contour correction signal and the color correction signal thus obtained are supplied from the control circuit 4 to the contour correction circuit 1 and the video amplification circuit 2, respectively.

Accordingly, the contour correction circuit 1 receives the contour correction signal and emphasizes and corrects the contour of the image. The video amplifier 2 receives the color correction signal and enhances the blue component of the video. As a result, it is possible to correct a phenomenon in which the visual function seems to be biased toward the yellow system, and to obtain an optimal color balance for the aged.

Next, FIG. 6 shows an example in which the parameters for color correction stored in the storage circuit 6 are stored in a form in which the red and green amplification degrees are reduced. That is, the horizontal axis (X-axis) indicates the set value corresponding to the preset voltage, and the vertical axis (Y-axis) indicates the correction levels (attenuation degrees) of red and green, in particular. By doing so, a color correction signal (attenuation of red and green) is read from this parameter. Accordingly, by operating each of the operation switches N, M1, M2, M3 in the correction selection circuit 5, the corresponding voltage values Vcn, Vc1, Vc2, Vc
c3 is supplied to the storage circuit 6 via the control circuit 4, and a control signal indicating the degree of attenuation of red and green (that is, the degree of attenuation of yellow) corresponding to this voltage value can be read.

By using the parameters for color correction shown in FIG. 6, the yellow component of the image can be attenuated. As a result, it is possible to correct a phenomenon in which the visual function is deviated to be yellowish due to a decrease in visual function, and to obtain an appropriate color balance for an aged person.

FIG. 2 is a block diagram showing a cathode ray tube display according to a second embodiment of the present invention. In FIG. 2, the portions corresponding to FIG. 1 described above are denoted by the same reference numerals, and therefore, description thereof will be omitted.

In the second embodiment shown in FIG.
A video switching circuit 7 is arranged between the contour correction circuit 1 and the video amplification circuit 2. The video switching circuit 7 is connected to a video generation circuit 8 for generating a plurality of test video signals described later.

The control circuit 4 includes the video generation circuit 8
Is connected to a video selection circuit 9 that can selectively select a plurality of test video signals provided by the above and supply the selected test video signals to the video amplification circuit 2 sequentially. Then, the video selection circuit 9
The first video signal corresponding to the test video signal selected by
And the control amounts of the second control signal, that is, the contour correction signal and the color correction signal, as shown in FIG.
n, Vs1, Vs2, Vs3 and Vcn, Vc1, V
It is configured to store by c2 and Vc3.

FIGS. 7 and 8 show examples of a plurality of test images used in the second embodiment shown in FIG. 2, in which FIG. 9 shows an example of a plurality of test images for selecting an optimal color balance. That is, each time a push switch (not shown) arranged in the video selection circuit 9 is operated, for example, the video signal whose blue color is enhanced is sequentially output from the video output circuit 8, and the test as shown in FIG. Images are sequentially reproduced by the cathode ray tube 3. Then, when the user inputs an image that looks most white to the image selection circuit 9, a color correction signal corresponding to the test image at this time is obtained.

The voltage values (Vc1, Vc2, Vc3) corresponding to the color correction signal thus selected are stored in correspondence with the operation switch of, for example, M1 shown in FIG.

FIG. 8 shows an example of a plurality of test images for allowing a user (aged person) to select an optimum degree of contour correction. That is, every time the push switch arranged in the video selection circuit 9 is operated, the video signal whose contour correction is reinforced is sequentially output from the video output circuit 8, and FIG.
The test images shown in FIG. Then, by inputting the image which is most visible to the user in the image selection circuit 9, an outline correction signal corresponding to the test image at this time is obtained. The voltage value (Vs) corresponding to the contour correction signal thus selected
1, Vs2, Vs3) are stored in correspondence with the operation switch of the M1 shown in FIG.

With the above operation, the contour correction and the color correction optimal for the user are preset to, for example, the operation switch of M1. Therefore, when the same user uses the image, by operating the operation switch M1 arranged in the correction selection circuit 5, the image which has been subjected to the contour correction and the color correction most suitable for the user can be displayed. Can be played.

[0042]

As is apparent from the above description, the cathode ray tube display device according to the present invention has a contour correction circuit capable of performing contour correction according to the first control signal, and a contour correction circuit capable of performing contour correction according to the second control signal. A video amplification circuit that can change the degree of amplification of the color signal, and generates the first and second control signals based on the parameters stored in the storage circuit to generate the contour correction circuit and the video. Since the configuration is such that the image is supplied to the amplifier circuit, it is possible to correct the deterioration of the visual function due to aging, and to reproduce an image which is easy for the elderly to see.

Further, the apparatus further comprises a video generation circuit for generating a plurality of test video signals, and a video selection circuit for selectively selecting a plurality of test video signals obtained from the video generation circuit. By storing the first and second control signals corresponding to the test video signals that can be recalled, it is possible to easily perform optimal correction settings in response to the deterioration of the visual function that gradually progresses with aging. And
It is also possible to easily set a correction value according to individual differences.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a cathode ray tube display device according to the present invention.

FIG. 2 is a block diagram showing a cathode ray tube display according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing a configuration of a correction selection circuit of the device shown in FIGS. 1 and 2;

FIG. 4 is a characteristic diagram schematically showing contour correction parameters used in the apparatus shown in FIGS. 1 and 2;

FIG. 5 is a characteristic diagram schematically illustrating color correction parameters used in the apparatus shown in FIGS. 1 and 2;

FIG. 6 is a characteristic diagram schematically illustrating another example of the color correction parameter used in the apparatus shown in FIGS. 1 and 2;

FIG. 7 is a schematic diagram showing an example of a test image for color correction used in the device shown in FIG. 2;

8 is a schematic diagram showing an example of a test image for contour correction used in the device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contour correction circuit 2 Video amplification circuit 3 Cathode ray tube (CRT) 4 Control circuit 5 Correction selection circuit 6 Storage circuit 7 Video switching circuit 8 Video generation circuit 9 Video selection circuit

Claims (6)

[Claims] An outline correction circuit capable of enhancing the outline of an image in an input image signal in accordance with a first control signal; amplifying the image signal whose outline has been corrected by the outline correction circuit; A video amplifying circuit capable of changing the degree of amplification of a color signal in accordance with a second control signal; a cathode ray tube for playing back video based on a video signal provided by the video amplifying circuit; A storage circuit for storing a parameter for generating a first control signal and a parameter for generating a second control signal to be applied to the video amplification circuit; and a memory for storing a parameter in response to a command from a correction selection circuit. A control circuit for supplying first and second control signals to the contour correction circuit and the video amplification circuit based on each parameter; Cathode ray tube display device according to claim. 2. An image generating circuit for generating a plurality of test image signals to be applied to the cathode ray tube, and an image selecting circuit capable of selectively selecting a plurality of test image signals obtained from the image generating circuit. The apparatus according to claim 1, further comprising: the first and second control signals corresponding to the test video signal selected by the video selection circuit, stored so as to be retrievable by a command from the correction selection circuit. A cathode ray tube display as described in the above. 3. The circuit according to claim 1, wherein the correction selection circuit includes an operation switch capable of calling first and second control signals respectively supplied to the contour correction circuit and the video amplifier circuit. The cathode ray tube display device according to claim 1 or 2. 4. The cathode ray tube display according to claim 1, wherein a blue component is varied by a first control signal supplied to said video amplifier circuit. apparatus. 5. The image processing apparatus according to claim 1, wherein a red component and a green component are varied by a first control signal supplied to the video amplifier circuit.
A cathode ray tube display device according to any one of the above. 6. The plurality of test video signals provided from the video generation circuit are a plurality of video signals whose color signals are gradually changed and a plurality of video signals whose video image degrees are gradually changed. The cathode ray tube display device according to any one of claims 2 to 5, characterized in that: