JPS5863990A - Indication system of color video display - 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 The present invention relates to a display method for displaying characters in a video display device.

Multiple pixel display lamps in three colors: red (6), festival, and blue (ro)! A device is known that displays images by arranging lamps in a matrix and sequentially controlling the brightness of each lamp depending on the magnitude of the video signal.

When displaying a television image or the like in this device for displaying large-scale video images, if one set of light source lamps is arranged for one picture element on the television screen, the number of light sources becomes enormous.

Therefore, in this Hinoki display device, the picture elements of the television image are usually thinned out to a certain extent to form the display device.

FIG. 1(b) shows an example of the arrangement of two light sources in a color image display device.

When characters such as numbers and letters are displayed on such a color display device using a character input means in addition to images,
When displaying a character with a small dot configuration, KR is in the dot configuration of an l character.

G and B are mixed. For example, in the display lamp configuration shown in Figure 1(a), the smallest 5x7 dot character
When displayed, as shown in Figure 2, one character and two characters ('A' contain R, G, and B, making it impossible to see them as characters.

An object of the present invention is to provide a color video display device that solves the above-mentioned problems of the conventional art. In the display device, two of the three color light emitting devices are provided with a switching means that can emit light in the same color as the remaining one color, and when displaying characters on the video display device, the two color light emitting devices are The gist of the present invention is a display system for a color video display device, which is characterized by switching color light emitting elements so that they all emit light in the same color.

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

#g3 Figure is a circuit block diagram of a video display device according to an embodiment of the present invention, Figures 4 and 5 are also explanatory diagrams of the coloring mechanism of the display lamp, and Figure 6 shows an example of a medium-sized image display according to the method of the present invention. .

Next, the general operation of the color image display device of the present invention will be explained with reference to FIG.

The video signal is input to a synchronization separation circuit 2, where synchronization signals (horizontal and vertical) are separated and sent to a synchronization control circuit 5.

On the other hand, the video vII signal is red in the color matrix circuit 3.
It is separated into three video signals, green (to) and blue (B), and each signal is sent to analog-to-digital converters 4-1 to 4-4.
The 0 analog Eirin signal input to -3 is converted into an L-bit digital signal (luminance signal) by a predetermined sampling clock from the synchronization control circuit 5. The t-bit luminance signal is input to the t-pit n-stage shift register 6.
n luminance signals in a 0 shift register that are sequentially stored in
That is, when luminance information for one line is accumulated, a write signal is sent from the shift register 7 having m stages of 1 bit to the lamp luminance control circuits 11-1 to 11-n of the first line. XX-; Although not shown in the figure, a t-bit memory is installed in X to m-n, and the t-bit brightness information of the shift register 6 is stored in each lamp brightness control circuit for each line.02 Lamp control circuit is 81-1 to 81-8 depending on the magnitude of the 14 degree signal indicated by the t bit.
The brightness of m−n is controlled, and this brightness continues until it is rewritten to the next brightness signal.

When the information for the next second line is stored in the shift register 6, the shift register 7 similarly writes data to the next 2-in lamp control circuits 12-1 to 12-n using a signal from the synchronous control circuit 5. The above is the display operation for the blue (6) luminance signal, but a circuit corresponding to the dotted line in Figure 3 is also prepared for the red (2) and green luminance signals, and the same display is performed for the red (2) and green luminance signals. Perform the action.

The above explanation is about the operation when displaying a movie on a color video display device, but when displaying characters, the third
In the figure, switches 12-1 to 12-3 are operated.

The lamp brightness control circuits 11-1 to 1m-n are connected to the switch 12.
-1 to 12-3 and connected to the character display control circuit 9.

In the color image display device to which the present invention is applied, the coloring mechanism of the light-emitting lamp has a structure as shown in FIG. 4 or 5, for example. Install the filter 13 0. On the front of the lamp 10-1, for example, a green color filter 13 is fixedly installed, and on the front of the lamp 10-2, a red (b) and green color filter 13 can be slid. In front of the lamp 10-3, a back color filter 13 and a green color filter 13 are slidably installed. If characters are to be displayed here, the two amplifiers 10 are switched so that they all function in the same color.

Figure 5 is an example of using a two-color emitting lamp, and lamp 1
1-1 is a lamp that produces only G color, lamp 11-2
is a lamp capable of producing colors by switching between R and G, and lamp 11-3 by switching between B and G, respectively.

In this case as well, when displaying characters, all the lamps are made to emit the same color.

When displaying a character as described above; (By making all the lamps emit light in the same color, the character in Figure 2 will cause all the middle character dots to emit light in the same color as shown in Figure 6. Can be done.

As explained above, according to the present invention, in a color video display device, when displaying characters, all the light emitting elements are displayed in the same color, that is, in monochrome, so that the dot matrix is effectively used and characters can be displayed. It is possible to improve the Ps image quality at the time.

Note that the variable color light emitting element may be provided on the entire surface of the display screen.
Further, it may be provided in a portion.

[Brief explanation of the drawing]

Figure 1 is an example of the light source lamp arrangement of a color image display device, i2
The figure shows an example of conventional character dot display. FIG. 3 is a circuit block diagram of a power 2-image display device according to an embodiment of the present invention, FIG. 4 is an explanatory diagram of a coloring mechanism of a display lamp, and FIG. show. In the figure, 11-1 to 1m-n are lamp brightness control circuits, 2 is a synchronization separation circuit, and 3 is a color! Trix. 4 is an analog-digital converter, 5 is a synchronous control circuit, 6 and 7 are shift registers, 8 is a display lamp, 9 is a character display control circuit, 10.11 is a lamp, 12 is a switch, and 13 is a color filter. (LL) (b) 2nd Flash Figure 4 Figure 5 Figure 6... B 7q

Claims (1)

[Claims] Multiple three-color light emitting elements! In a color image display device arranged in a matrix, two of the three color light emitting elements
The color light emitting elements are equipped with a switching means that can emit light in the same color as one of the remaining colors, and when displaying characters on the screen display device, the two color light emitting elements are switched to emit light in the same color. A stone color image display method that is characterized by