JPS602667B2 - Display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display method of a display device for displaying input/output information of an electronic computer or the like.

Generally, display devices used in electronic computers and the like often provide a guidance display and always use the same area on the display screen when displaying input/output information.

In this case, the brightness of the area on the display screen that is constantly used is much worse than the area that displays other input/output information.
Although other input/output information areas are still usable, the display device has to be discarded due to deterioration of the guidance display portion, resulting in a shortened lifespan. The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to prevent deterioration of the guidance display portion that is always displayed in a fixed manner, thereby extending the life of the display device. The object of the present invention is to provide an effective display method.

In order to achieve the above object, the present invention has a refresh cycle for guidance display that uses a certain area of the display screen in a fixed manner, and a refresh cycle for input/output information display that uses a certain area of the display screen variably. By making the IJ refresh period longer than the above, screen deterioration is reduced, thereby extending the life of the display device. Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, the display section 5 has an input/output information display area and a guidance display area. A paste fresh memory 1 for displaying input/output information and an IJ fresh memory 2 for displaying guidance are provided corresponding to each of these areas. The refresh memories 1 and 2 are given an address a from the timing generation circuit 3 for reading display data from the refresh memories 1 and 2. Refresh memory 1,
The display data read out from 2 accesses the character generators 41 and 42, respectively, and reads out the display pattern. Here, whether the display pattern read from the character generators 41 and 42 is an alphabet or
A designation address b is given from the timing generation circuit 3 to designate whether it is a kana character or a kanji character. The display pattern output from the character generator 42 is applied to the AND gate 7.

Further, the output of the binary counter 6 is applied to the AND gate 7. The binary counter 6 calculates the screen synchronization signal c that is output once per screen, and divides the synchronization signal c into 2
It counts the number of times and gives one output to the AND gate 7.

The output of the AND gate 7 is sent to the guidance display area of the display section 5 via the OR gate 8. On the other hand, the output of the character generator 41 is sent to the input/output information display area of the display section 5 via the OR gate 8 in accordance with a normal screen synchronization signal.

When displaying normal input/output information, as is well known, display data is read out from the refresh memory 1 one by one, a display pattern is read out from the character generator 41, and the data is displayed on the display section 5 via the OR gate 8. Display the relevant information in the input/output information display area. Now, if you access the guidance display refresh memory 2, the display data in the guidance screen refresh memory 2 will be:
The display pattern is read out in accordance with the timing signal from the timing generation circuit 3 and sent from the character generator 42 to the AND gate 7.

In the AND gate 7, the output signal of the binary counter 6 causes 1.
The gate is opened every other screen and guidance information is sent to the OR gate 8. As a result, the guidance display data is refreshed at twice the frequency of the input/output data. At this time, the brightness of the area where the guidance display is performed will be slightly lower than when it is refreshed every time, but
Since the same characters or patterns are always displayed, there is no problem in practical use. Since the deterioration of the display screen is proportional to the frequency of its use, the deterioration will be reduced by extending the refresh cycle. In this embodiment, a case has been described in which the screen refresh cycle of the guidance display area that always uses the same area on the display screen is twice the refresh cycle of the input/output information display area.
It does not necessarily have to be doubled, but it can be increased by N times (
N=an integer greater than or equal to 2).

This is achieved by making the counter an N-ary counter. The object of the present invention can also be achieved by blinking the guidance display area. Since the deterioration of a display screen is proportional to the frequency of use of the screen, if the refresh cycle is lengthened, the deterioration of the screen can be reduced in proportion.

Therefore, according to the present invention, screen deterioration can be reduced by increasing the screen refresh cycle of the guidance display area, which always uses the same area on the screen, by an integral number N times the refresh cycle of the input/output display area - long life of the display device. can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an embodiment of the display method according to the present invention. 1, 2: Screen refresh memory, 3: Timing generation circuit, 4: Character generator ~ 5: Display section. O diagram

Claims (1)

[Claims] 1 In a device that displays at least fixed information and variable information on the same screen, a first refresh memory that stores the fixed information, a second refresh memory that stores the variable information, and a second refresh memory that stores the variable information. a first character generator and a second character generator capable of outputting a display pattern according to outputs from a first refresh memory and a second refresh memory; A display method characterized in that the period of the output from the second character generator is multiplied by a plurality of times the period of the output from the second character generator, and both display patterns are combined and supplied to the display section.