JPH01200394A - Display device - Google Patents

Abstract

PURPOSE:To divide a display plate and to drive it with independent voltage values by providing plural power circuits and data-side drivers and scan-side drivers which are divided into groups. CONSTITUTION:The power circuits are constituted divisionally as 4a-4h; and the power circuits 4a-4d are driving power sources for data-side drivers and the power circuits 4e-4h are driving power sources for scan-side drivers. Namely, those power sources drive the data-side drivers 2a-2d by the power circuits 4a-4d and the scan-side drivers 3a-3d by the power circuits 4e-4h respectively. Namely, the circuit constitution wherein eight power sources drive eight drivers in each group one to one is employed. Consequently, the display plate 5 is divided and driven with the independent voltage values.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a circuit configuration of a display device, and more particularly to a combination of a power supply circuit and a drive circuit section.

2. Description of the Related Art Conventionally, this type of display device has had a circuit configuration as shown in FIG. FIG. 2 shows a plasma display device. Conventional display devices.

As shown in FIG. 2, a plasma display panel 5, a data side driver 2, a scan side driver 3. The five components are the power supply circuit 4 and the control circuit 1.

Problems to be Solved by the Invention As described above, the conventional display device was composed of five elements: a data side driver, a scan side driver, and a power circuit display board. In particular, the power supply circuit is configured to supply predetermined voltage and current values to the data side driver and the scan side driver by dividing the value to each driver.

For this reason, in particular, as the display capacity of the display panel increases and the size of the display area increases, a power supply with a large power supply capacity is required. Therefore, there is a drawback that the shape of the power supply circuit becomes larger than desired.

In addition, as the shape of the display board becomes larger, it becomes difficult to achieve uniform electrical characteristics of the display board, and because the operating voltage differs locally, it is difficult to obtain an operating voltage margin for the display device. There was a drawback.

The present invention has been made in view of the above-mentioned conventional situation,
Accordingly, an object of the present invention is to provide a novel display device that makes it possible to eliminate the above-mentioned drawbacks inherent in the conventional technology.

Differences between the invention and the prior art In contrast to the conventional display device described above, the present invention has a circuit configuration in which it has a plurality of power supply circuits and the data side driver and scan side driver are divided into a plurality of groups. There are differences.

Means for Solving the Problems In order to achieve the above object, the display device according to the present invention is composed of five parts: one display board, a data side driver, a scan side driver, a power supply circuit, and a control circuit. It has a data side driver and a scan side driver divided into multiple groups.

The power supply circuit is divided to correspond to each of the drivers, and each group of drivers has the individual power supply circuit.

Embodiments Next, preferred embodiments of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention.

Referring to FIG. 1, reference number 1 indicates a control circuit.

28 to 2d indicate data side drivers, and 3a to 3d indicate scan side drivers, respectively. In the present invention, as shown in the figure, each pair of drivers is divided into two sets (two or more sets may be used). In other words, the data side driver is 2
A, 2b, and 2c.

It is divided into 2d groups, and the scanning side drivers are 3a and 3b.
It is divided into a set of 30.3d and a set of 30.3d.

A control circuit 1 receives a horizontal synchronization signal, a vertical synchronization signal 1 display data signal, and a clock signal from a CRT controller, etc., converts them to appropriate timing, and controls data side drivers 2a to 2d and scan side drivers 3a to 3d. On the other hand, when an abnormal input signal is detected, the power supply circuits 48 to 4
Control is also performed to protect the display device by controlling h. The data-side drivers 28 to 2d are composed of a shift register and a latch output circuit, receive one display data signal by the shift register, latch it in synchronization with the horizontal synchronization signal, and send a predetermined voltage waveform from the output circuit to the display board 5. is being applied. The scan side drivers 3a to 3d also include a system register,
It is composed of output circuits, and the output circuits are sequentially selected in synchronization with a horizontal synchronization signal, and a voltage waveform is applied to the display panel 5.

In the present invention, the power supply circuit is divided into 4a to 4h, of which power supply circuits 4a to 4d are the drive power supplies for the data side driver, and power supply circuits 48 to 4h are the drive power supplies for the scan side driver. That is, each of these power supplies has power supply circuits 48 to 4d connected to data side drivers 2a to 2d.
The power supply circuits 4e to 4h drive each of the scan side drivers 3a to 3d. In other words, a circuit configuration is adopted in which eight power supplies are used to correspond to eight drivers in each group. For this reason, it is possible to divide the display panel 5 and drive it with independent voltage values.

As a second embodiment, for example, by adopting a configuration in which each electrode of the display board and the output circuit of the data side driver and the scan side driver are alternately connected for each different group,
Even-numbered and odd-numbered outputs can be driven with different voltage values. Furthermore, by changing the configuration, voltage values can be selected in any combination.

As described in detail, the present invention has a plurality of power supply circuits and a data-side driver and a scan-side driver divided into a plurality of groups. It has become possible to drive with a voltage value, or to drive each specific electrode of the display board with a voltage value different from that of other electrodes.

This has made it possible to realize a display device having a large display panel or a large capacity display panel without impairing the voltage operation margin. In addition, since the power supply circuit is divided into a plurality of parts, each circuit can be miniaturized, and as a result, the display device as a whole can be miniaturized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a display device according to the present invention, and FIG. 2 is a block diagram of a conventional display device. 181. Control circuit, 2a to 2d, data side driver, 3a to 3d, scan side driver. 4a to 4h, power supply circuit, 5010 display board, 6°1.
interface circuit

Claims (1)

[Claims] In a display device that displays a desired display pattern by applying a predetermined voltage waveform between a plurality of pairs of electrodes, the plurality of drive circuits that drive each of the electrodes are divided into at least two or more sets, and the A display device, wherein each of the divided sets has an individual power supply circuit.