JPS62157663A - Light emitting element - Google Patents

Abstract

PURPOSE:To improve the contrast between an emitting portion and non-emitting black color portion, by providing filters for transmitting lights emitted by respective picture elements of red, green and blue colors, on the emitting surface of respective picture elements within display sections. CONSTITUTION:First, a red color emitted from a red picture element 11 is transmitted through a red color filter 21 and radiated outward without attenuation. In the same way, respective colors emitted from a green picture element 12 and blue picture element 13 are transmitted through respective green and blue filters 22, 23 and radiated outward. In the case of that outside light, for example, sun light is entered to the respective filters 21, 22, 23, it is attenuated into the light intensity with the specific transmission factor because of the absorption function of the respective filters 21, 22, 23. That is, without attenuating the intensity of light emitted from respective picture elements of red, green and blue colors, light from the outside and unnecessary light are can be absorbed, thereby the contrast can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light-emitting element forming a display screen of a large-sized display device, and particularly to a color display light-emitting element capable of displaying clear light emission.

[Conventional technology]

This type of conventional light-emitting element has red, green, and blue pixels (9), t12), and (1B)' as shown in FIG. Ma)
Each pixel C11) is arranged in an IJ box shape and arranged in a matrix.

It was constructed with a uniform filter covering the entire surface of (121, QB).

Based on the above configuration, the operation of the conventional light emitting element will be explained with reference to FIG. First, the light emitted from each red, green, and blue pixel (tn, Oa, (1B)) arranged in a matrix is transmitted light Φ proportional to the transmittance T of the filter ■.
-T (here Φ is the original intensity of light emitted from each pixel) is emitted from the filter.

Next, light incident on the surface of each external pixel α1), (121, as), for example sunlight, once enters the filter)), and here the light is proportional to the transmittance T of the filter (support)). The intensity is attenuated to reach the surface of each pixel (2), (2), 03).

Furthermore, the sunlight that has arrived from the outside is further reflected on the surface of each pixel α, Shou, αB), passes through the filter (A), and is attenuated to the intensity of light proportional to the transmittance T, and is emitted to the outside. be ejected. Therefore, the sunlight emitted from the outside is emitted to the outside with a light intensity proportional to the transmittance T, and the intensity of this light is reduced to 1f-, so that each pixel (b), (
121, C1B), the black level in the non-emission state was lowered in all rows to improve contrast.

[Problems that the invention attempts to solve]

Conventional light-emitting elements are configured as described above, and while they can reduce the influence of external light (such as sunlight) on the display screen, they also reduce the effect of light emitted by each red, green, and blue pixel. The problem is that the contrast between the red, green, and blue pixels (all light emission and the black part without light emission) is insufficient, making it impossible to obtain a clear image. had.

This invention was made to solve the above-mentioned difficult problems, and it transmits the light emitted by each red, green, and blue pixel individually, and increases the intensity of light in the necessary band. The objective is to eliminate the attenuation of light and to improve the contrast between the total light emission in each red, green, and blue pixel and the black part where no light is emitted, thereby obtaining a clear image.

[Means for solving problems]

In the light emitting element according to the present invention, each of the red, green, and blue pixels is formed integrally, and the red, green, It is configured by providing a filter that transmits only the light emitted from each blue pixel.

[Effect]

The display element of this invention can absorb external light and unnecessary light without attenuating the intensity of the light emitted by each red, green, and blue pixel, improving contrast and displaying clear images. Display the entire image.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an overall exploded perspective view of the display element according to this example, and FIG. 2 is a graph of the light intensity of each color light of the display element shown in FIG. are red, green, and back pixels (9), (12)
, CIB> formed as one piece of gold, each pixel αυ, (2)
, C3), and a face glass C14 of the display section (1) that displays a target color by controlling the light emission of the display section (1).
) on the surface of each red, green, and blue pixel Qll, (12
1゜ (red, green, evening filters (2111El, ml and all, printed corresponding to 1E, each of the above red, green, evening filters (211+Print), -) are red, green, Each color light emitted by each blue pixel α11. ).

The display section (1) is behind a Y grid (3) for selecting pixels in the Y-axis direction, an X grid (4) for selecting all pixels in the X@B direction, a filament (5), and a glass container ( 6), forming a matrix-type flat CRTi as a whole.

Next, the operation of this embodiment based on the above configuration will be explained based on FIG. 2. First, the red light emitted from the red pixel (9) passes through the red filter f2.1+ffi and is emitted to the outside without being attenuated. Similarly, green pixel (121, blue pixel (
The color lights emitted from the light source 181 are also completely transmitted through the green and blue filters () and (4)) and are emitted to the outside. Therefore, the green and blue colored lights of each field are emitted to the outside while maintaining the light intensity Φ.

In addition, when external light, for example sunlight, enters the red, green, and blue filters (ztl + H* R1, the light intensity is attenuated to the transmittance T2, similar to the filter of the conventional light emitting element). and the others are each filter (211, (2a,
It will be absorbed by ql.

That is, each red, green, and blue filter (211, □□□) *
(281 is the corresponding red, edge, and blue pixel f, 111
．． (13) Transmits the artificially emitted colored light without attenuation, and absorbs light in bands other than the corresponding colored light, so that each of the red, green, and blue pixels (111, (121,
(13) In addition to improving the contrast between the colored lights, it also works to improve the contrast between the total light emission of each pixel (11J+ (121+ (181) and the case of no light emission (black portion)).

Note that the red, green, and blue filters (211° (4), yew) in the above embodiment were arranged to be applied to the surface of the face glass σ→ of the display section (1) by printing. A filter can also be formed by attaching it, or alternatively, a filter can be formed by sputtering or vapor deposition.

Furthermore, although the above embodiments have been described using an IJ type Rough Run CRT, the present invention can also be applied to other cathode tubes, display devices, and the like.

〔Effect of the invention〕

As described above, the light emitting element according to the present invention has red, green, and blue pixels integrally formed, and the light emitting surface of each pixel in the display section displays a target color by controlling the light emission of each pixel. Since we have adopted a configuration in which filters are provided to transmit only the light emitted by each red, green, and blue pixel, the intensity of the light emitted by each red, green, and blue pixel is completely attenuated. It is possible to absorb light from the outside and unnecessary light without causing any interference, thereby improving contrast and displaying clear images.

[Brief explanation of drawings]

Fig. 1 is an overall exploded perspective view of a display element according to an embodiment of the present invention, Fig. 2 is a light intensity graph of each color light in the display element of Fig. 1, and Fig. 3 is a perspective view of a conventional display element. , 4th
The figure shows the entire light intensity graph of each color light in the display element of FIG. (1) Display section (9) Fist... Red pixel scream...
Green pixel (19)...φ blue pixel a4. )Φ/e face glass

Claims (3)

[Claims] (1) In a light-emitting element having a display section in which red, green, and blue pixels are integrally formed and display a target color by controlling the light emission of each pixel, the light-emitting surface of each pixel in the display section is 1. A light-emitting element characterized in that it is constructed by covering each of red, green, and blue pixels with a filter that transmits only light emitted from each pixel. (2) The light emitting device according to claim 1, wherein the filter is configured by printing on the surface of each pixel. (3) The light emitting device according to claim 1, wherein the filter is applied to the surface of each pixel.