JPH0133836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character and graphic display method in which the background color of the display portion is changed depending on the display content of the display screen in a character and graphic information transmission system, and the display content can be easily separated and identified. .

A block diagram for explaining a conventional character/graphic display method is shown in FIG. In FIG. 1, 1 is a demodulation circuit for received data, 2 is a control circuit, 3 is a memory for received data, 4 is a data video processing circuit, 5 is a video drive circuit, and 6 is a CRT. The received data is demodulated by the demodulation circuit 1, and the demodulated data is recorded in the memory 3 and read out under the control of the control circuit 2, and is then sent to the video drive circuit 5 via the data video processing circuit 4.
It was applied to a CRT (Cathode Ray Tube) 6 to display text and graphics. Therefore, it has been difficult to change the background color within one screen depending on the displayed content and allow the viewer to clearly understand the displayed content.

An object of the present invention is to eliminate these drawbacks, and the background color of the display portion is changed depending on the data content. Hereinafter, the present invention will be described in detail with reference to embodiments and drawings.

FIG. 2 is a block diagram for explaining an embodiment of the present invention, in which 1 is a demodulation circuit for received data, 2 is a control circuit for controlling writing and reading to memory and forming an image, and 3 is a block diagram for receiving data. 4 is a data video processing circuit that converts character and graphic signals into video signals, 5 is a video drive circuit, 6 is a CRT,
7 is a background color control circuit, 8 is a first background color processing circuit, 9 is a second background color processing circuit, and 10 is a switching circuit.

A demodulation circuit 1 demodulates received data including a character/figure signal, a first and second background color designation signal, and an area designation signal, and each of the signals is stored in a memory 3 under the control of a control circuit 2 .

Each signal written in the memory 3 is sequentially read out under the read control of the control circuit 2, and the character/figure signal is input to the data/video processing circuit 4. The data video processing circuit 4 receives character and graphic signals.
It is converted into a video signal for display on the CRT 6, and the video signal is sent to the switching circuit 10 according to the timing for forming the video of the control circuit 2.

The switching circuit 10 performs switching control to send the output of the data video processing circuit 4 to the video driving circuit 5 under the control of the control circuit 2, inputs the video signal to the video driving circuit 5, and sets the voltage level for driving the CRT 6. and is applied to the CRT 6. On the other hand, the timing of the background color control circuit 7 is controlled by the control circuit 2, and the first and second background color designation signals and area designation signals are read out from the memory 3 at the timing. The read first background color designation signal is sent to the first background color processing circuit 8, which generates a background color A signal, and the background color A signal is sent to the switching circuit 10. Ru. Further, the second background color designation signal is sent to the second background color processing circuit 9, which generates a background color B signal and sends it to the switching circuit 10.

The switching circuit 10 switches the output of the first background color processing circuit 8 and the output of the second background color processing circuit 9 at a specified position under the control of the background color control circuit 7 that has read the area designation signal, respectively. The output is sent to the video drive circuit 5. The video driving circuit 5 converts the background color A signal and the B signal into a voltage level for driving the CRT, and applies the voltage level to the CRT to display the background colors A and B at predetermined positions.

The background color configuration shown in Figure 3 is divided into two horizontally, but if the background color is divided into two vertically, it is also possible to display background color B as part of background color A in area specification. Therefore, it is possible to perform switching control of the switching circuit 10.

As mentioned above, the character/figure signal, the first background color signal, and the second background color signal written in the memory 3 are sequentially read out from the memory 3 under the control of the control circuit 2 and the background color processing circuit 7, and are subjected to data video processing. Circuit 4 The first and second background color processing circuits 8 and 9 generate a video signal, a background color A signal, and a background color B signal, and one screen is configured at a designated display position by the switching control of the switching circuit 10. do.

In this embodiment, the area of the display areas of background colors A and B can be arbitrarily changed and the background colors can be specified in more detail due to the functions of the switching circuit, background color control circuit, and data video processing circuit. This can be easily understood by increasing the number of processing circuits. Further, by providing a plurality of background color processing circuits according to the number of background colors, it is also possible to change the type of color (hue, saturation, etc.) that can be displayed for each background color.

As explained above, according to the present invention, characters,
It is possible to easily change the background color of a figure using a background color control signal included in the received data.
This has the advantage of being able to eliminate misreading of characters and figures.

Another advantage is that important data and non-important data can be easily distinguished.

INDUSTRIAL APPLICATION This invention can be utilized for a character graphic display apparatus system.

[Brief explanation of drawings]

FIG. 1 is a block diagram illustrating a conventional character/figure display method, FIG. 2 is a block diagram illustrating the present invention, and FIG. 3 is a diagram illustrating a display state within one screen according to the present invention. DESCRIPTION OF SYMBOLS 1... Demodulation circuit, 2... Control circuit, 3... Memory, 4... Data video processing circuit, 5... Video drive circuit, 6... CRT, 7... Background color control circuit, 8.
9...Background color processing circuit, 10...Switching circuit.

Claims (1)

[Claims] 1. In a text/figure display method in which demodulated data of received data including text/figure information is written in a memory, read out, and displayed, a plurality of text/figure signals obtained from the demodulated data, a plurality of background color designation signals, and areas of each background color are provided. A region designation signal designating the area is written in the memory, and the character/figure signal in the memory is read out under the control of the control circuit and inputted to the data video processing circuit to generate a video signal, and the control circuit switches and controls the switching circuit. sends the video signal to the video drive circuit, reads out a plurality of background color designation signals and area designation signals in the memory, inputs each background color designation signal to the designated background color processing circuit, and sets each background color. A signal is generated, and the switching position of each background color signal is read from the area designation signal, and the switching circuit is controlled to switch each background color signal in the designated area, and the one screen to be displayed is sent to the video drive circuit. A character/figure display method characterized by comprising: