JPH10187127A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which displays a high quality image by respectively adjusting luminance and contrast in an animation and a non- animation. SOLUTION: A synthetic circuit 3 synthesizes outputs of a non-animation circuit 1B and an animation circuit 1A, and holds whether any color of a character display picture is made a transparent color when it synthesizes, and a control circuit 2 extracts the transparent color held by the display signal of the non- animation 1B, and outputs an animation control signal 2X showing the display period of the animation, and the synthetic circuit 3 displays preferentially the animation when the animation control signal 2X is active, and displays preferentially a character excepting that. The output of this synthetic circuit 3 is converted to the analog data 4X by a D/A converter 4, and an animation parameter 7A and a non-animation parameter 7B are switched by a switch circuit 6, and are amplified by an amplifier circuit 5 to be displayed on a display means 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a personal computer, and more particularly to a moving image reproducing a motion of a subject in a natural color, such as a video camera, and a non-moving image such as characters and graphics. The present invention relates to a display device that displays both.

[0002]

2. Description of the Related Art As shown in FIG.
A non-moving circuit 1B that outputs character / graphics non-moving data, a moving image circuit 1A that outputs moving image data of a natural color subject, a combining circuit 3 that combines moving image data and non-moving data, and the combining circuit 3 A / D converter 4 for converting an output signal from the A / D converter into analog data, an amplifier circuit 5 for amplifying the analog data 4X by a preset luminance and contrast CY parameter 107, and an amplifier circuit 5 for amplifying the analog data 4X. And display means 8 for displaying the analog data 4X.
Since adjustment of Y is one and cannot be set independently for moving image data and non-moving image data, luminance BY is focused on the moving image portion.
If the contrast and the contrast CY are adjusted brightly, the focus of the characters in the non-moving image part will deteriorate or become abnormally bright. Cannot be displayed on.

[0003]

Therefore, in the conventional display device, the brightness and contrast are set at the same level without distinction between a non-moving image and a moving image. 8. Deterioration of focus etc. occurs, characters are crushed, and eyes are tired when reading because the characters are too bright. Conversely, if the brightness is adjusted to the optimal position according to the characters in the non-moving part, the moving image is too dark Had a problem that the natural color could not be sharpened.

Accordingly, an object of the present invention is to provide a display device for individually adjusting the brightness and contrast of non-moving image data and moving image data.

[0005]

In order to solve the above-mentioned problems, a display device according to the present invention comprises a non-moving circuit for outputting non-moving data of characters / graphics, and a moving image data of a subject having a natural color. A moving picture circuit, a control circuit for extracting a display period of the moving picture data output from the moving picture circuit from the display period of the non-moving picture data and transmitting a moving picture control signal, and a moving picture control signal transmitted from the control circuit. A combining circuit for combining the moving image data at the time and the non-moving image data when the moving image control signal is not transmitted; a D / A converter for converting an output signal from the combining circuit into analog data; Based on a signal, switching to a preset moving image parameter of luminance and contrast of the moving image data / a non-moving parameter of luminance and contrast of the non-moving image data A switching circuit, an amplifier circuit for amplifying the analog data by the brightness and contrast switched by the switching circuit, and a display unit for displaying the analog data amplified by the amplifier circuit. I do.

[0006]

Next, a display device according to an embodiment of the present invention will be described with reference to the drawings.

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

FIG. 2 shows a display screen example (A) and an operation diagram (B) of a display device according to an embodiment of the present invention.

FIG. 3 is a time chart of the display device according to the embodiment of the present invention.

A display device according to an embodiment of the present invention comprises:
As shown in FIG. 1, a non-moving image circuit 1B that outputs non-moving image data of characters / graphics, a moving image circuit 1A that outputs moving image data of a natural color subject, and a moving image data output from the moving image circuit 1A. A control circuit 2 that extracts a display period from a display period of non-moving image data and sends out a moving image control signal 2X, and sends out moving image data and a moving image control signal 2X when the moving image control signal 2X is sent from the control circuit 2. A synthesizing circuit 3 for synthesizing non-moving image data when not being processed, a D / A converter 4 for converting an output signal from the synthesizing circuit 3 into analog data 4X, and moving image data set in advance based on the moving image control signal 2X. And a non-moving image parameter 7B of brightness and contrast of non-moving image data and a non-moving image parameter 7B of non-moving image data. The brightness and contrast, and a amplifier circuit 5 for amplifying the analog data 4X, a display unit 8 for displaying the amplified analog data 4X in this amplification circuit 5.

Next, the operation of the display device according to one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 2A, the operation of the display device according to one embodiment of the present invention is as follows. The moving image means a full-color, full-motion moving image such as a video playback screen or a TV screen, and these screens may be displayed simultaneously on the display unit 8, or only one side. In some cases, a moving image with a non-moving character screen as a background is displayed, and a luminance parameter BB and a contrast parameter C for the non-moving image are displayed.
B, a luminance parameter BA for moving images, and a contrast parameter CA, which are independently adjusted.

As shown in FIG. 1, the non-moving image circuit 1B
And the output of the moving image circuit 1A are synthesized by the synthesizing circuit 3, and when the synthesizing is performed, which color of the character display screen is to be made transparent, the control circuit 2 holds the transparent color held by the display signal of the non-moving image circuit 1B A color is extracted, and a moving image control signal 2X indicating a display period of the moving image is output. When the moving image control signal 2X is active (S = 1 in FIG. 2B), the combining circuit 3 gives priority to the moving image. Display is performed, and the other characters are combined so that characters are displayed with priority.

As shown in FIG. 3, this moving picture control signal 2X is active only during the moving picture display period, and the output of the synthesizing circuit 3 is converted by the D / A converter 4 into analog data 4X.
Into the amplifier circuit 5, and the amplifier circuit 5 switches the output of the luminance parameter BA and the contrast parameter CA of the moving image parameter 7A and the luminance parameter BB and the contrast parameter CB of the non-moving image parameter 7B by the switching circuit 6 to amplify. Then, as shown in FIG. 2B, the switching circuit 6 switches between the moving image control signal 2X and the non-moving image depending on the value of the moving image control signal 2X, as shown in FIG. In, the amplification circuit 5 amplifies the luminance parameter BA and the contrast parameter CA, and in the non-moving image display period, the amplification circuit 5 amplifies the luminance parameter BB and the contrast parameter CB.

[0015]

As described above, according to the display device of the present invention, the contrast and brightness of the non-moving image and the moving image can be adjusted independently. Brightness can be set higher, and for non-moving image display of characters and the like, there is an effect that the resolution can be prioritized without crushing characters or deteriorating the focus, and the brightness can be adjusted to an appropriate level without tiredness.

[Brief description of the drawings]

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

2A and 2B are a display screen example (A) and an operation diagram (B) of the display device according to the embodiment of the present invention.

FIG. 3 is a time chart of the display device according to the embodiment of the present invention.

FIG. 4 is a block diagram of a conventional display device.

[Explanation of symbols]

 2 control circuit 3 synthesis circuit 4 D / A converter 5 amplifying circuit 6 switching circuit 8 display means 1A video circuit 1B non-video circuit 2X video control signal 4X analog data 7A video parameter 7B non-video parameter BA, BB brightness parameter CA, CB Contrast parameter

Claims (1)

[Claims] 1. A non-moving circuit for outputting non-moving data of text / graphics, a moving image circuit for outputting moving image data of a natural-color subject, and a display period of moving image data output from the moving circuit is set to the non-moving period. A control circuit that extracts a moving image control signal from the display period of the moving image data and transmits the moving image control signal; the moving image data when the moving image control signal is transmitted from the control circuit; and the non-moving image data when the moving image control signal is not transmitted. , A D / A converter for converting an output signal from the synthesis circuit into analog data, and a predetermined moving image parameter of luminance and contrast of the moving image data based on the moving image control signal. A switching circuit for switching to non-moving image parameters of luminance and contrast of non-moving image data, and a luminance and contrast switched by the switching circuit. A display device comprising: an amplifier circuit for amplifying the analog data; and display means for displaying the analog data amplified by the amplifier circuit.