JPS61221782A - 4-color forming element color display method - 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 current general method for color emitting type color display devices is to emit one variety of colors by a collection of minute three-color emitting color display elements arranged side by side.

By changing the three-color light-emitting element to a four-color light-emitting element,
By enabling color development with a spectral distribution that is more faithful to the original name than the three-color method, it achieves high-quality color display.

It is an object of the present invention to facilitate adjustment of color display.

FIG. 1 is a spectral distribution diagram showing the distribution of luminescent energy for wavelengths from 400 meters to 700 nanometers of a light-emitting color display element.

The solid line is the white spectral distribution, which is indicated by a horizontal line of 100 bart. In FIG. 1, a rectangular spectral distribution obtained by dividing the white spectral distribution into three is drawn with broken lines. It is a schematic diagram of the spectral distribution of red, green, and blue in the case of a three-color method. This shows that when the spectral distribution of all three colors is developed at 100 bart, the color becomes white. In FIG. 2, the solid line indicates white, and the broken line indicates the spectral distribution of red, yellow, green, and blue in the case of the four-color method of the present invention. Comparing with FIG. 2, the green spectral distribution part of the three-color method is divided into two to create green and yellow spectral distributions. Figure 3 shows the actual spectral distribution of red as a solid line when red is produced using the three-color method.

The broken lines indicate color development using the three-color method. Red is a zero-divided spectral distribution, which shows that the three-color method can produce a color with a spectral distribution that is highly approximated. In the case of Figure 3, various colors can be produced depending on the strengths and weaknesses of each of the three color spectral distributions. This is a coloring method using light-emitting color elements.

Figure 4 shows the case where Oreshiji color is developed using the three-color method.

FIG. 5 shows the case where colors are developed using the four-color method of the present invention.

The solid lines in FIGS. 4 and 5 show the spectral distribution of actual colors, and the broken lines show the coloring states by the three-color method and the four-color method, respectively. The four-color method provides a better approximation of the light distribution. In colorism, it is said that the eye has the ability to perceive the same color even if the spectral distributions do not necessarily match when the chromaticity values are adjusted to be the same, and this is explained by the term metamerism. Also the spectral distribution of the broken line of the three-color method in Figure 4.

It is said that the eye perceives the solid orange color.

Accordingly, the three-color method is said to produce sufficient colors for television images. Images produced in television studios under sufficient lighting conditions seem to be able to produce accurate colors, but images from news sites often have strong reddish or greenish colors. In the example of orange in Figure 4, the actual spectral distribution of the color is just vertically divided into two parts of the green spectral distribution part of the three-color method, whereas the actual color produced by the three-color method is The spectral distribution of the spectral distribution must be approximated by a distribution in the form of a horizontal cut.In a studio with sufficient lighting conditions, delicate adjustments are possible, but in places with poor lighting conditions, the adjustment tends to be distorted, and red and green There will be parts that are too strong and you will see those colors. According to metamerism, if the chromaticity values are adjusted to be the same even if the spectral distributions are different, the eyes have the ability to perceive the same color, but conversely, if the spectral distributions are equal, the eyes will definitely perceive the same colors. see color Technically, it is easier to adjust color development by focusing on this point.

The four-color method shown in FIG. 5 approximates the spectral distribution better than the three-color method shown in FIG. 4, and is superior in that respect.

Furthermore, the theoretical characteristics of dividing the spectral distribution of the four-color method of the present invention as shown in FIG. 2 will be explained. FIG. 6 shows the visibility distribution of the human eye, and the highly sensitive part corresponds to the green spectral distribution part of the three-color method. Therefore, it is an important example to study the development of orange color, which has a spectral distribution that vertically divides this area. The spectral distribution value is high in the part of the eye with high visibility,
Colors from red through yellow to green are susceptible to similar effects. The feature of the four-color method of the present invention is that the green spectral distribution part of the three-color method, that is, the part where the visibility of the eye is high, is divided into two parts, yellow and green, to obtain a four-color spectral distribution.

In this way, a color distribution shape close to the actual color spectral distribution can be obtained.The color display method, which uses light-emitting elements, has the lowest cost next to the three-color method, and is technically accurate in color generation and nine-color adjustment. There are features that make it easier.

The rectangular spectral distributions drawn with broken lines in FIGS. 1 to 5 are schematic diagrams used for convenience of explanation.

The actual spectral distribution is often not rectangular but mountain-shaped with one vertex. As an example of the mountain-shaped spectral distribution, each spectral distribution part is 620 bnm for red and 5 bnm for yellow.
70f meters, green is 520 nanometers, blue is 45 nanometers
An example of this is a spectral distribution with a peak at 0 nanometers.

The field of application of the present invention is a color display device that displays multiple colors using a large number of small four-color emitting color display elements.

There is a color display for the TV, video and calculator.

[Brief explanation of drawings]

FIGS. 1 to 5 are spectral distribution diagrams showing the distribution of luminescent energy of a light-emitting color display element. FIGS. 2 and 5 are spectral distribution diagrams showing examples of color development in the case of the color development method using the four-color emitting color element of the present invention. Figure 1,
FIGS. 3 and 4 are spectral distribution diagrams showing examples of color development in the case of three-color emitting color display elements commonly used at present, and are examples for comparison with the present invention. FIG. 6 is a visual sensitivity distribution diagram of the human eye for explaining the theoretical characteristics of the present invention.

Claims (1)

[Claims] 1. A color display method for displaying color information by arranging a plurality of light emitting color display elements in parallel, the color display device having four color light emitting elements.