JPS62150388A - Plasma display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plasma display device used for computer graphics displays and the like.

[Conventional technology]

The standard display device for information processing equipment is a CRT display device, which connects to a CRT interface connector that consists of horizontal synchronization signals, vertical synchronization signals, and display data, but this requires a large footprint and is not light enough to be easily carried. Small and lightweight display devices have been developed.

One such example is a plasma display device using a plasma display.

Conventionally, plasma display devices have clocks, multiple bits of display data synchronized with the clock, and this display data.
The information was displayed under the control of a first synchronization signal that controls whether or not to sample and shift the image by clicking, and a first synchronization signal that controls horizontal scanning and a second synchronization signal that controls vertical scanning. . Therefore, the main body of the information processing apparatus outputs a clock, display data, and an interface signal containing a first synchronization signal and a second synchronization signal, and is connected to a plasma display device through a dedicated connector.

[Problem that the invention seeks to solve]

The conventional plasma display device described above requires a control circuit dedicated to the plasma display device in the information processing device main body because the interface signal is different from the interface signal for CRT control.
A different operation was required than when using a display device. For this reason, there is a drawback that software is not completely compatible when using a CRT display device and when using a plasma display device.

An object of the present invention is to provide a plasma display device that can be displayed using software compatible with a CRT display device by providing a circuit that converts signals for a CRT display device into signals for a plasma display device. .

[Means for solving the problem] The plasma display device of the present invention is a CRT from an information processing device.
ii+I A first synchronizing signal for controlling horizontal scanning is generated from a horizontal synchronizing signal for t'n and a display position signal indicating validity of display data, and a first synchronizing signal for controlling horizontal scanning is generated from a vertical synchronizing signal for CRT control and a display position signal indicating the validity of display data. a display control circuit that generates a second synchronization signal for controlling scanning, display data for CRT control from the information processing device, the display position signal, and the CRT;
a data control circuit that creates a display clock and multiple bits of display data synchronized with the display clock from the itl control basic clock; a plasma display device that displays input data, samples this display data using the clock, controls whether or not to shift it, and controls screen synchronization by the first synchronization signal and the second synchronization signal; It consists of:

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a system including one embodiment of the present invention. This system is composed of an information processing device 1, a data control circuit 2, a display control circuit 3, and a plasma display 4, and the control circuit 2.3 and the plasma display 4 correspond to this embodiment. The information processing device 1 outputs display data a for CRT control, a horizontal synchronization signal d, a vertical synchronization signal e, and CRTiil.
A display position signal C indicating the position where the JN basic clock b and display data a are valid is output. The data control circuit 2 controls display data a and CR' output from the information processing device 1.
The display control circuit 3 creates and outputs a plasma display control clock g and multiple display data f synchronized with the clock from the control basic clock b and the display position signal C. A first synchronization signal l] and a second synchronization signal i of the plasma display 4 are generated from the display position signal C, horizontal synchronization signal d, and vertical synchronization signal e that are output from the plasma display 4.The plasma display 4 The multi-bit display signal f from the data control circuit 2, the plasma display control clock g, the first synchronization signal l from the display control circuit 3] and the second
A synchronization signal i is input, a multi-bit display signal f is sampled and shifted using a clock g, and horizontal scanning is controlled by the first synchronization signal, and vertical scanning is controlled by the second synchronization signal. Controlled by signal i, information is displayed on the screen.

FIG. 2 is a detailed block diagram of the data control circuit 2 shown in FIG. This data control circuit 2 includes a basic 70 for CRT control.
Generate the clock g for the plasma display from the clock b, and
T ii Control Display data for control Create n-bit display data f, %f, synchronized with clock g from the display position signal.

FIG. 3 is a time chart of CRT interface signals output from the information processing device 1, in which the vertical synchronization signal e and the horizontal synchronization signal d indicate the timing of the display position signal C and the serial display data a. Display data a
The shaded area is data other than the display screen, and is ignored by the display position signal C. L1 to L are the numbers of lines in the horizontal direction.

FIG. 4 is a time chart of the plasma display device of this embodiment. The first pixel information d1 in the horizontal direction is detected by the display position signal C, and consists of multiple bits (2 bits in this example).
Display data f, , f2 are created. Display data f,
, f2 and the plasma display clock g synchronized with C
R, T control basic clock 1] and display position signal C, and is used for sampling multi-bit display data fl, f2. The first synchronization signal i is created from the display position signal C and the horizontal synchronization signal d, and controls the sampling and horizontal scanning of the multi-bit display data f, , f2, and the second synchronization signal i is the display position signal C. and a vertical synchronizing signal e to control vertical scanning.

〔Effect of the invention〕

As explained above, the present invention provides control necessary for a plasma display based on the horizontal synchronization signal, vertical synchronization signal, basic clock of the conventional CRT interface signal, and the display position signal indicating the effective position of the newly added display data. By creating the signal, it is possible to connect the plasma display device to the CRT interface connector of the information processing apparatus main body, regardless of the configuration or software of the information processing apparatus main body.

[Brief explanation of drawings]

FIG. 1 is a block diagram including a plasma display device according to an embodiment of the present invention, FIG. 2 is a detailed block diagram of the data control circuit of FIG. 1, and FIG. 3 is a time chart 1 of the CRT interface signal of FIG.・, FIG. 4 is a time chart of the plasma display device of this embodiment. 1... Information processing device, 2... Data control circuit, 3.
...Display control circuit, 4...Plasma display, a...
・Display data, b...Basic clock for CRT control, C
...Display position signal, d...Horizontal synchronization signal, e...
Vertical synchronization signal, f, f, ~fn...Multi-bit (n bit) display data, g...Clock for plasma display, 11...First synchronization signal for plasma display, i...
・Plasma display lr5! J 2nd page

Claims (1)

[Claims] A first synchronization signal for controlling horizontal scanning is generated from a horizontal synchronization signal for CRT control from the information processing device and a display position signal indicating validity of display data, and a first synchronization signal for controlling horizontal scanning is generated from a vertical synchronization signal for CRT control and the display position signal. a display control circuit that generates a second synchronization signal for vertical scanning control; and a display control circuit that generates a display clock from the CRT control display data from the information processing device, the display position signal, and the CRT control basic clock. a data control circuit that creates a plurality of bits of display data synchronized with a clock, and inputs the display clock and the plurality of bits of display data synchronized with the clock, and samples and shifts this display data with the clock. What is claimed is: 1. A plasma display device comprising: a plasma display device that controls and displays whether or not a synchronization occurs, and whose screen synchronization is controlled by the first synchronization signal and the second synchronization signal.