JPH10133846A - Picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picture display device not requiring a parameter input means by analyzing a parameter superimposed on display data. SOLUTION: This picture display device receives display data D/P on which a parameter outputted from a host system 1 is superimposed, the parameter P is sampled by a sampling means 21 based on a horizontal synchronizing signal H and a vertical synchronizing signal V, this parameter P is read and transferred to an A/D converter 22 to binarize and also transferred to a shift register 23, this parameter P stored in the shift register 23 is transmitted to an analysis means 24 to analyze, and the analyzed result by this analysis means 24 is transferred to a control means 26 via a D/A converter 25. Thus, the control means 26 performs luminance adjustment, screen size adjustment, screen position adjustment and screen distortion compensation, and displays display data D on a display means 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display apparatus using a cathode ray tube or a liquid crystal panel, and more particularly to an image display for processing parameters superimposed on display data sent from a host system and controlling the display data. Related to the device.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional image display apparatus communicates by superimposing parameters during a retrace period of display data, and can superimpose parameters during a retrace period. A special host system is required, and the type of parameters to be communicated is determined by the sender who owns the host system and cannot be controlled by the user using the display device. Input means for inputting parameters from outside was required.

[0003]

As described above, in the conventional image display device, in the case of communication means for superimposing a parameter on display data, the parameter to be superimposed cannot be controlled by a user, and during a retrace period. A special host system for superimposing and transmitting parameters on the computer was required.

It is therefore an object of the present invention to provide an image display device which superimposes desired parameters on display data to control brightness, screen size, screen position, and screen distortion correction.

[0005]

In order to solve the above-mentioned problems, an image display apparatus according to the present invention comprises a storage unit in which parameters of brightness, screen size, screen position, and screen distortion correction data are stored in advance. A host system having output means for superimposing the parameters stored in the storage means on the display data and outputting based on the horizontal synchronization signal and the vertical synchronization signal, and a horizontal synchronization signal and a vertical synchronization signal output from the host system Sampling means for sampling the parameters, an A / D converter for binarizing the parameters sampled by the sampling means, and a shift register for taking in the parameters binarized by the A / D converter. From the parameters captured by this shift register, the brightness, screen size, screen position, screen distortion correction data Analyzing means for analyzing the data, analyzed the luminance in the analysis unit, the screen size, screen position,
A D / A converter for converting the screen distortion correction data into an analog signal, and the luminance analog-converted by the D / A converter.
Based on the screen size, screen position, and screen distortion correction data,
It is characterized by comprising a control device for controlling the display data to be displayed, and a display device including a display device for displaying the display data controlled by the control device.

According to another aspect of the present invention, there is provided an image display apparatus comprising: a first counter for resetting at a pulse edge of the vertical synchronization signal to count the number of pulses of the horizontal synchronization signal; A clock circuit that divides a horizontal synchronization signal to generate a clock, a second counter that resets at a pulse edge of the horizontal synchronization signal, counts the number of clocks generated by the clock circuit, and generates an output signal; And a sampling circuit for sampling the parameter with the output signal generated by the second counter.

[0007]

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

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

FIG. 2 is a waveform diagram showing display data according to the first embodiment of the present invention.

As shown in FIG. 1, the image display device according to the first embodiment of the present invention comprises a storage means 12 in which parameters P of luminance, screen size, screen position, and screen distortion correction data are stored in advance. The parameter P stored in the storage means 12 is superimposed on the display data D, and the horizontal synchronization signal H
A host system 1 having output means 11 for outputting based on the vertical synchronizing signal V; a sampling means 21 for sampling a parameter P based on the horizontal synchronizing signal H and the vertical synchronizing signal V output from the host system 1; An A / D converter 22 for binarizing the parameter P sampled by the sampling means 21, a shift register 23 for taking in the parameter P binarized by the A / D converter 22, and a shift register 23 Analysis means 24 for analyzing the brightness, screen size, screen position, and screen distortion correction data from the parameter P taken in at step, and analog conversion of the brightness, screen size, screen position, and screen distortion correction data analyzed by the analysis means 24 D / A converter 25, and the brightness, screen size, Surface position, based on the screen distortion correction data, the control means controls to display the display data D 2
6 and a display device 2 including display means 27 for displaying the display data D controlled by the control means 26.

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

As shown in FIGS. 1 and 2, the image display apparatus according to the first embodiment of the present invention receives display data D / P on which parameters output from the host system 1 are superimposed, and outputs a horizontal synchronization signal. The parameter P is sampled by the sampling means 21 based on H and the vertical synchronization signal V, the parameter P is read, transferred to the A / D converter 22, binarized, and transferred to the shift register 23,
The parameter P stored in the shift register 23 is transmitted to the analysis unit 24 for analysis, and the result of the analysis by the analysis unit 24 is transmitted to the control unit 26 via the D / A converter 25.
Then, the control unit 26 performs brightness adjustment, screen size adjustment, screen position adjustment, and screen distortion correction, and displays the display data D on the display unit 27.

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

FIG. 3 is a block diagram of an image display device according to a second embodiment of the present invention.

In the image display apparatus according to the second embodiment of the present invention, as shown in FIG. 3, the sampling means 21 of the first embodiment resets the horizontal synchronizing signal V at the pulse edge of the vertical synchronizing signal V. A first counter 212 for counting the number of pulses of H, a clock circuit 214 for dividing the horizontal synchronization signal H to generate a clock, and a clock generated by the clock circuit 214 by resetting at a pulse edge of the horizontal synchronization signal H The configuration is a sampling unit 121 including a second counter 213 that counts the number and generates an output signal, and a sampling circuit 211 that samples a parameter P using the output signal generated by the second counter 213. The configuration is the same as in the first embodiment.

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

As shown in FIG. 3, the operation of the image display apparatus according to the second embodiment of the present invention is to receive display data D / P on which parameters output from the host system 1 are superimposed, and receive a vertical synchronization signal V Is detected, the first counter 212 is reset, and the number of pulses of the horizontal synchronizing signal H is counted by the first counter 212. When a predetermined number is counted, the second counter 213 is reset. When a predetermined number of clocks generated by the clock circuit 214 have been counted, the sampling circuit 211 reads the parameter P at that time and transfers it to the A / D converter 22.
, The parameter P is binarized and transferred to the shift register 23, the parameter P stored in the shift register 23 is transmitted to the analysis unit 24 for analysis, and the result of analysis by the analysis unit 24 is D / A converted. The control unit 26 performs brightness adjustment, screen size adjustment, screen position adjustment, and screen distortion correction by transferring the display data D to the display unit 27 via the display unit 27.

As described above, the operation of sampling the parameter P by the sampling circuit 211 is repeated until the second counter 213 counts a predetermined number.
The counter 212 counts a predetermined number of pulses of the horizontal synchronizing signal H, thereby resetting the second counter 213. The first counter 212 counts the number of pulses of the horizontal synchronizing signal H. The number of clocks to be counted is defined in advance or externally.

The sampling means 121 may be operated by providing a third counter for resetting by the pulse edge of the vertical synchronization signal V sent from the host system 1 and counting the number of pulses of the horizontal synchronization signal H. Further, the display data D / P is reset by the pulse edge of the horizontal synchronizing signal H sent from the host system 1.
May be provided with a fourth counter that detects and counts the edge of.

[0020]

As described above, according to the image display apparatus of the present invention, the parameters can be superimposed during the display period of the display data from the host system. A host system that outputs display data without requiring a special host system for transmission can transmit the parameter superimposed during the display period, and the user can superimpose the parameter on the display data to obtain a desired luminance. There is an effect of displaying an image on which adjustment, screen size adjustment, screen position adjustment, and screen distortion correction have been performed.

Further, according to the image display apparatus of the present invention, by superimposing parameters on display data from the host system, desired brightness adjustment, screen size adjustment, screen position adjustment can be performed without requiring parameter input means. There is an effect of displaying an image after adjustment and screen distortion correction.

[Brief description of the drawings]

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

FIG. 2 is a waveform diagram of display data of the image display device according to the first embodiment of the present invention.

FIG. 3 is a block diagram of an image display device according to a second embodiment of the present invention.

FIG. 4 is a waveform diagram of display data of a conventional image display device.

[Explanation of symbols]

 Reference Signs List 1 host system 2 display device 11 output means 12 storage means 21, 121 sampling means 22 A / D converter 23 shift register 24 analysis means 25 D / A converter 26 control means 27 display means 211 sampling circuit 212 first counter 213 2 counter 214 Clock circuit D Display data H Horizontal synchronization signal P Parameter V Vertical synchronization signal

Claims (2)

[Claims] A storage means for storing parameters of brightness, screen size, screen position, and screen distortion correction data in advance;
A host system having output means for superimposing the parameters stored in the storage means on the display data and outputting based on the horizontal synchronization signal and the vertical synchronization signal; and a horizontal synchronization signal and a vertical synchronization signal output from the host system. Sampling means for sampling the parameters based on the signal, an A / D converter for binarizing the parameters sampled by the sampling means, and a shift register for taking in the parameters binarized by the A / D converter Analysis means for analyzing the brightness, screen size, screen position, and screen distortion correction data from the parameters taken in by the shift register; and the brightness, screen size, screen position, screen distortion correction analyzed by the analysis means. A D / A converter for converting data into analog data;
The brightness, screen size,
A display device comprising: control means for controlling display of the display data based on screen position and screen distortion correction data; and display means for displaying the display data controlled by the control means. An image display device characterized by the above-mentioned. A first counter for resetting at a pulse edge of the vertical synchronization signal to count the number of pulses of the horizontal synchronization signal; a clock circuit for dividing the horizontal synchronization signal to generate a clock; A second counter that resets at a pulse edge of the horizontal synchronizing signal and counts the number of clocks generated by the clock circuit to generate an output signal; and a sampling that samples the parameter using the output signal generated by the second counter. 2. An image display device according to claim 1, wherein said image display device is constituted by said sampling means having a circuit.