JPH0640242B2 - Color display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] Among RGB three primary colors of a color display device, for example, a color-developing element of G is arranged by using a double number of other colors, so that a kana,
When displaying relatively simple characters such as numbers and alphabets, it is possible to display relatively natural white and other colors without significantly increasing the number of color elements.

[Industrial application field]

The present invention relates to a color electronic dial, more specifically, a slight increase in the number of color-developing elements compared to a monochrome display device.
The present invention relates to a color-forming element array that is economically viable and can display white in practice.

Lightning dials, which display relatively simple characters such as kana, numbers, and alphabets, have recently become colorized, but without a significant increase in price, the color, especially the most commonly used white natural Color display is required.

[Problems to be solved by conventional technology and invention]

FIG. 3 shows the arrangement of the color-forming elements of the most general conventional color display panel. This is one pixel in which three elements of RGB are arranged in a triangle. In FIG. 4, one pixel is formed by arranging four GRGB elements in a square shape.

As described above, in the related art, three elements or four elements are used for one pixel to enable image display and character display. Therefore, the number of elements required is 3 to 4 times that of the white character dedicated display device. This is a huge cost increase and is often not economically viable.

Also, the character display panel often displays white vertical lines and horizontal lines, but in the case of the arrangement shown in FIG. 3, the horizontal arrangement becomes white because GBR is repeated, so there is no problem. By repeating, it becomes yellow, and by repeating at the position of BGBG, it becomes cyan or the like. In the case of FIG. 4, both horizontal and vertical lines are GR
Yellow for GR or magenta for BBGG. Also, the diagonal lines are green for GGGG or magenta for RBRB.

When a character is displayed with the configuration of these lines, the color is unilaterally determined by the position of the line, which makes the character difficult to see and cannot be used.

Therefore, if you dislike increasing the price of the device and make the number of color light emitting elements the same as the black and white dial, to display white characters,
The number of characters displayed must be reduced to 1/3 to 1/4.

The present invention was created in view of these points.
It is an object of the present invention to provide a color display device that is practically capable of displaying white color at a price close to that of a monochrome character display panel.

[Means for solving problems]

Therefore, in the present invention, a predetermined one color X among the three primary colors is provided with twice as many color-developing elements as the other two colors Y and Z, and the first row repeats XYXZ and the second row. Starts from the same column as the start of the first row and repeats YXZZX, the third row repeats ZXYX similarly, the fourth row repeats XZXY repeats, the fifth row repeats XZXY repeats, the sixth Each row is arranged in the same manner by repeating ZXYX, the seventh row by YXZZX, the eighth row by similar XYXZ, and the ninth and subsequent rows by repeating the first to eighth rows. To do.

Further, when the color-developing elements of the same color are adjacent to each other, their brightness is lowered.

[Work]

When the luminance of the color-developing element for color X is reduced to 1/2 of the value that balances the white with the other two colors, the horizontal line is repeated XYXZ to white, the vertical line is repeated XYZXXZYX to white, and the diagonal line is YXXZZXXXY, YZXXZYXX. , Or ZXX
YYXXXZ turns white, and the characters formed by these lines turn white.

〔Example〕

Hereinafter, the gist of the present invention will be specifically described with reference to the embodiments shown in the drawings. FIG. 2 shows one embodiment of the color-developing element array of the present invention, in which the number of light-emitting elements of color G is doubled compared with other colors. Then, the brightness balance of this G is 1 /
I am using it as 2. The horizontal line is white by repeating GBGR, and the vertical line is BRGGRBGG or RGGBBGGR.
Is white, and the shaded area is white for BGGRRGGGB, BRGGRBGG, or RGGBBGGR. Therefore, these vertical,
Characters composed of horizontal and diagonal lines are white.

It should be noted that the actual character is not always composed of a straight line of 8 dot units that is color-balanced as described above, and may be a line of 2 dots or 3 dots, so that it is always completely white. Although it is not a character, the character is much easier to see than the conventional color element array shown in FIG. 3 and FIG. 4, and a display quality that can be sufficiently used is obtained.

In the above example, the brightness of G is lowered in advance to 1/2 of the value at which the other two colors and white are balanced, but the same color may come next to R and B. At that time, that color is too strong to synthesize white, so by reducing the brightness,
Improve white balance.

As can be understood from the above description, even if the number of display characters is sacrificed, if priority is given to white character display close to natural color, RGGB is displayed as one dot and even if the display color is unnatural, , When giving priority to the number of characters and price,
Each of the R, G, and B color-developing elements can be displayed as one dot. In this case, the number of display characters with respect to the number of light emitting (coloring) elements is the same as that of the black and white character display panel.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a color character display device capable of displaying a white character that is sufficiently practical for a small increase in cost as compared with a black and white character display device, and its industrial effect is great. Is.

[Brief description of drawings]

 FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is an embodiment of the present invention, FIG. 3 is a conventional coloring element array, and FIG. 4 is another conventional coloring element array. In the figure, R is red, G is green, and B is blue.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Igarashi 1776 Yanoguchi, Inagi-shi, Tokyo Inside Fujitsu Kiden Co., Ltd. (72) Kenji Nishi Nishi 1776 Yanoguchi, Inagi-shi, Tokyo Inside Fujitsu Kiden Co., Ltd.

Claims (2)

[Claims] 1. A color display device comprising a large number of color-developing elements for each of the three primary colors of red, green and blue, wherein a predetermined one color X among the three primary colors is the other two colors Y and Z.
2 times the number of color-developing elements are provided, the first row repeats XYXZ, the second row repeats YXZX starting from the same column as the start of the first row, and the third row repeats ZXYX. Repeat, 4th row repeats XZXY, 5th row repeats XZZXY, 6th row repeats ZXYX, 7th row repeats YXXZX, 8th row repeats XYXZ , The 9th and subsequent rows are the 1st to 8th rows
A color display device in which each color-forming element is arranged by repeating a row. 2. The color display device according to claim 1, wherein when the color forming elements of the same color are adjacent to each other, the brightness of the color forming elements is reduced.