JP2001094817A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device provided with a distortion correction function for correcting screen distortion due to the deterioration of high voltage regulation caused by a change in horizontal frequency of a received signal. SOLUTION: A frequency discrimination device 15 discriminates the horizontal frequency of the received signal on the basis of a received horizontal/vertical synchronizing signal and a distortion correction circuit 13 controls a prepared distortion correction signal on the basis of the discriminated horizontal frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated. The present invention relates to a display device provided with a distortion correction function for correcting screen distortion.

[0002]

2. Description of the Related Art As a multi-scan type display monitor device, a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated is known.

FIG. 3 is a block diagram showing a main part of a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated.

In FIG. 3, this horizontal deflection high voltage integrated type display device inputs a received horizontal / vertical synchronization signal to an oscillation circuit 11 and outputs a horizontal deflection high voltage output circuit based on a horizontal drive signal oscillated from the oscillation circuit 11. At 12, a horizontal deflection high voltage signal (high voltage output) is output.

A horizontal / vertical synchronization signal output from the oscillation circuit 11 is applied to a distortion correction circuit 13, where a left / right pincushion distortion correction signal and a vertical trapezoidal distortion correction signal are created. And the vertical trapezoidal distortion correction signal is applied to the horizontal size control circuit 14.

The horizontal size control circuit 14 includes a distortion correction circuit 1
A horizontal size control signal is created based on the left and right pincushion distortion correction signal, the vertical trapezoidal distortion correction signal, and the high-voltage fluctuation feedback signal from the horizontal deflection high-voltage circuit 12, and the horizontal size control signal is sent to the horizontal deflection high-voltage circuit 12. In addition, the horizontal deflection high voltage circuit 1
2 is controlled.

[0007]

When the horizontal frequency of a received signal changes in the conventional horizontal deflection high-voltage integrated display device shown in FIG. 3, the horizontal level changes in response to the change in the horizontal frequency of the received signal. There is a problem that high-voltage regulation of the horizontal deflection high-voltage signal output from the high-voltage deflection circuit 12 is deteriorated, thereby causing screen distortion.

Accordingly, an object of the present invention is to provide a display device provided with a distortion correction function for correcting screen distortion caused by deterioration of high-voltage regulation accompanying a change in the horizontal frequency of a received signal.

[0009]

To achieve the above object, the present invention is directed to a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated. It is characterized by comprising frequency discriminating means for discriminating a horizontal frequency, and distortion correcting means for correcting a screen distortion amount based on the horizontal frequency discriminated by the frequency discriminating means.

According to a second aspect of the present invention, in the first aspect of the invention, the frequency determining means determines a horizontal frequency of the received signal based on a received horizontal and vertical synchronization signal.

According to a third aspect of the present invention, in the first aspect of the present invention, an oscillation circuit for generating a horizontal drive signal based on the horizontal / vertical synchronization signal and a horizontal drive signal generated from the oscillation circuit are provided. A horizontal deflection high voltage circuit that outputs a horizontal deflection high voltage signal, a distortion correction circuit that outputs a distortion correction signal based on a horizontal / vertical synchronization signal from the oscillation circuit, a distortion signal output from the distortion correction circuit, and the horizontal deflection high voltage A horizontal size control circuit that outputs a horizontal size control signal to the horizontal deflection high voltage circuit based on the high voltage fluctuation feedback signal output from the circuit; and the distortion correction unit has a horizontal frequency determined by the frequency determination unit. The distortion correction circuit is controlled based on the following.

According to a fourth aspect of the present invention, in the first aspect of the present invention, an oscillation circuit for generating a horizontal drive signal based on the horizontal / vertical synchronization signal and a horizontal drive signal generated from the oscillation circuit are provided. A horizontal deflection high voltage circuit that outputs a horizontal deflection high voltage signal, a distortion correction circuit that outputs a distortion correction signal based on a horizontal / vertical synchronization signal from the oscillation circuit, a distortion signal output from the distortion correction circuit, and the horizontal deflection high voltage A horizontal size control circuit that outputs a horizontal size control signal to the horizontal deflection high voltage circuit based on the high voltage fluctuation feedback signal output from the circuit; and the distortion correction unit has a horizontal frequency determined by the frequency determination unit. And controlling the distortion correction circuit and the horizontal size control circuit based on

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a display device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a main part of an embodiment of a horizontal deflection high voltage integrated type display device to which a display device according to the present invention is applied and which has a circuit configuration in which a horizontal deflection output and a high voltage output are integrated. It is.

In FIG. 1, parts having the same functions as those of the conventional apparatus shown in FIG. 3 are denoted by the same reference numerals as those used in FIG. 3 for convenience of explanation.

In FIG. 1, an oscillation circuit 11, a horizontal deflection high voltage circuit 12, a distortion correction circuit 13, and a horizontal size control circuit 14
Is basically the same as the configuration shown in FIG.

That is, the oscillation circuit 11 receives the received horizontal / vertical synchronization signal, generates a horizontal drive signal, and outputs the signal to the horizontal deflection high voltage circuit 12.

The horizontal deflection high voltage circuit 12 receives the horizontal drive signal from the oscillation circuit 11, generates a horizontal deflection high voltage signal, and outputs the signal as a high voltage output.

The distortion correction circuit 13 receives the horizontal and vertical synchronizing signals from the oscillation circuit 11, generates a left and right pincushion distortion correction signal and a vertical trapezoidal distortion correction signal, and converts the left and right pincushion distortion correction signal and the vertical trapezoidal distortion correction signal. Output to the horizontal size control circuit 14.

The horizontal size control circuit 14 includes the distortion correction circuit 1
3, a horizontal pinch distortion correction signal, a vertical trapezoidal distortion correction signal, and a high voltage fluctuation feedback signal from the horizontal deflection high voltage circuit 12 are input to create a horizontal size control signal. Output to
The horizontal deflection high voltage circuit 12 controls the high voltage output based on the horizontal size control signal from the horizontal size control circuit 14.

In this embodiment, the horizontal frequency of the received signal is corrected by the horizontal / vertical synchronization signal received by the frequency discriminator 15 in order to correct the screen distortion caused by the deterioration of the high voltage regulation accompanying the change of the horizontal frequency of the received signal. The signal is determined based on the signal, and the distortion correction signal generated by the distortion correction circuit 13 is controlled based on the determined horizontal frequency.

That is, in the configuration shown in FIG.
A frequency discriminator 15 is provided for discriminating the horizontal frequency of the received signal based on the received horizontal and vertical synchronizing signals, and is generated by the distortion correction circuit 13 based on the horizontal frequency of the received signal discriminated by the frequency discriminator 15. The right and left pincushion distortion correction signal and the vertical trapezoid distortion correction signal are controlled.

According to such a configuration, the distortion correction circuit 13
Control of the left and right pincushion distortion correction signal and the vertical trapezoidal distortion correction signal based on the horizontal frequency of the received signal, the horizontal size control signal output from the horizontal size control circuit 14 changes corresponding to the horizontal frequency of the received signal. As a result, it is possible to correct the screen distortion due to the deterioration of the high voltage regulation caused by the change of the horizontal frequency of the received signal.

FIG. 2 is a block diagram showing a main part of another embodiment of a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output to which the display device according to the present invention is applied are integrated. FIG.

In this embodiment, the distortion correction circuit 1 is based on the horizontal frequency of the received signal determined by the frequency determination device 15.
3 in that the horizontal size control circuit 14 is controlled in addition to the control of FIG. The other configuration is the same as the configuration shown in FIG.

That is, in FIG.
Receives the received horizontal / vertical synchronization signal, generates a horizontal drive signal, and outputs the signal to the horizontal deflection high voltage circuit 12.

The horizontal deflection high voltage circuit 12 receives a horizontal drive signal from the oscillation circuit 11, generates a horizontal deflection high voltage, and outputs it as a high voltage output.

The distortion correction circuit 13 receives the horizontal and vertical synchronizing signals from the oscillation circuit 11 and creates left and right pincushion distortion correction signals and vertical trapezoidal distortion correction signals. Horizontal signal size control circuit 1
4 is output.

The horizontal size control circuit 14 receives the horizontal pincushion distortion correction signal from the distortion correction circuit 13, the vertical trapezoidal distortion correction signal, and the high-voltage fluctuation feedback signal from the horizontal deflection high-voltage circuit 12, and receives a horizontal size control signal. To create
This horizontal size control signal is output to the horizontal deflection high voltage circuit 12. The horizontal deflection high voltage circuit 12 controls the high voltage output based on the horizontal size control signal from the horizontal size control circuit 14.

The frequency discrimination device 15 receives the received horizontal and vertical synchronization signals, determines the horizontal frequency of the received signal based on the horizontal and vertical synchronization signals, and based on the determined horizontal frequency, corrects the distortion correction circuit 13. And the horizontal size control circuit 14.

With such a configuration, it is also possible to correct the screen distortion due to the deterioration of the high-voltage regulation accompanying the change in the horizontal frequency of the received signal.

[0032]

As described above, according to the present invention,
In a horizontal deflection high voltage integrated type display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated, a frequency discriminating means for discriminating a horizontal frequency of a received signal, and a screen distortion amount based on the horizontal frequency discriminated by the frequency discriminating means. And a distortion correction means for correcting the image distortion. Thus, there is an effect that the screen distortion due to the deterioration of the high voltage regulation due to the change of the horizontal frequency of the received signal can be corrected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main part of an embodiment of a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output to which the display device according to the present invention is applied are integrated.

FIG. 2 is a block diagram showing a main part of another embodiment of a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output to which the display device according to the present invention is applied are integrated; .

FIG. 3 is a block diagram showing a main part of a horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated.

[Explanation of symbols]

 Reference Signs List 11 oscillation circuit 12 horizontal deflection high voltage output circuit 13 distortion correction control circuit 14 horizontal size control circuit 15 frequency discrimination circuit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 3/23 H04N 3/23 F term (reference) 5C068 AA20 BA08 CA09 CC10 DA02 HA18 HB03 JA03 JB00 LA02 MA05

Claims (4)

[Claims] 1. A horizontal deflection high voltage integrated display device having a circuit configuration in which a horizontal deflection output and a high voltage output are integrated, a frequency determination means for determining a horizontal frequency of a received signal, and a horizontal frequency determined by the frequency determination means. And a distortion correction unit that corrects a screen distortion amount based on the following. 2. The display device according to claim 1, wherein said frequency discriminating means discriminates a horizontal frequency of said received signal based on a received horizontal and vertical synchronizing signal. 3. An oscillation circuit for generating a horizontal drive signal based on the horizontal / vertical synchronization signal; a horizontal deflection high voltage circuit for outputting a horizontal deflection high voltage signal based on the horizontal drive signal generated from the oscillation circuit; A distortion correction circuit that outputs a distortion correction signal based on a horizontal / vertical synchronization signal from the horizontal deflection high voltage circuit based on a distortion signal output from the distortion correction circuit and a high voltage fluctuation feedback signal output from the horizontal deflection high voltage circuit And a horizontal size control circuit that outputs a horizontal size control signal to the control unit, wherein the distortion correction unit controls the distortion correction circuit based on the horizontal frequency determined by the frequency determination unit. Item 2. The display device according to Item 1. 4. An oscillation circuit for generating a horizontal drive signal based on the horizontal / vertical synchronization signal; a horizontal deflection high voltage circuit for outputting a horizontal deflection high voltage signal based on the horizontal drive signal generated from the oscillation circuit; A distortion correction circuit that outputs a distortion correction signal based on a horizontal / vertical synchronization signal from the horizontal deflection high voltage circuit based on a distortion signal output from the distortion correction circuit and a high voltage fluctuation feedback signal output from the horizontal deflection high voltage circuit A horizontal size control circuit that outputs a horizontal size control signal to the control unit; and the distortion correction unit controls the distortion correction circuit and the horizontal size control circuit based on the horizontal frequency determined by the frequency determination unit. The display device according to claim 1, wherein: