KR20000065313A - A thin-type broun tube utilizing the separation and refraction of electron beams - Google Patents

Abstract

PURPOSE: A sheet-like CRT is provided to reduce the thickness thereof by using separation and refraction of scanning lines radiated from an electron gun. CONSTITUTION: A CRT of the invention comprises an electron gun for radiating electron beam for displaying images and a screen onto which the electron beam is scanned to display images. The CRT also has first and second scanning line separation and refraction means. The first separation and refraction means separates the electron beams radiated from the electron gun into a number of perpendicular scanning lines and refracts the scanning lines at first angle. The second separation and refraction means separates the separated and refracted perpendicular scanning lines into a number of horizontal scanning lines and then refracts them to be illuminated on the screen.

Description

Thin tube using separation and refraction of scanning line {A THIN-TYPE BROUN TUBE UTILIZING THE SEPARATION AND REFRACTION OF ELECTRON BEAMS}

The present invention relates to a cathode ray tube (CRT), a cathode ray tube (CRT) mainly used in an image display, and more particularly to a foil having a thickness thinner than that of a conventional cathode ray tube by displaying an image using separation and refraction of a scanning line. Iii) relates to a type CRT.

A CRT is an electronic device that displays image data on a screen by radiating electrons containing image data through an electron gun and causing the fluorescent material to penetrate the screen.

These CRTs are designed to have a certain distance from the gun to the screen in order to spread the electrons emitted from the gun. Therefore, the conventional CRT has a large volume (especially a thickness) in principle, which is an obstacle in miniaturization of electronic products. Although research on the manufacture of thin CRTs is being actively conducted, the effect of the direct injection method is insignificant.

Among the devices used for an image display, a liquid crystal display (LCD) is one of the smallest thicknesses. This LCD has the advantage of being capable of thin manufacturing, unlike the CRT, but has a problem that the visible angle is significantly smaller than the CRT and the cost is high.

The present invention is to solve the problems of the conventional CRT, and to provide a thin CRT which greatly reduces the volume, that is, the thickness of the CRT by using separation and refraction of the scanning line radiated from the electron gun.

The thin CRT of the present invention is a new concept displayer having only the advantages of CRT and LCD, and its volume (thickness) can be reduced to LCD level.

1 is a perspective view for explaining the overall shape of a thin CRT tube according to the present invention.

2 is a view for explaining the principle that the vertical scan line is refracted by the vertical refraction plate behind the screen in the thin CRT tube of the present invention.

Figure 3 is a view for explaining the principle that the horizontal scanning line is separated by the horizontal refracting plate at the bottom of the thin CRT of the present invention.

4 is a view for explaining the principle that each scanning line is refracted by a reflector in the thin CRT tube of the present invention.

In order to achieve the above object, the thin CRT of the present invention has a structure of irradiating the screen by separating and refracting the scanning line radiated from the electron gun, thereby reducing the thickness of the CRT to the level of the LCD screen.

The thin CRT according to the present invention includes a stepped bottom refracting plate and a rear refracting plate for refraction and separation of scan lines.

As described above, the separation and refraction of the scanning line using the stepped refraction plate is characterized by the refraction of the electron beam, which is different from the refraction of normal light. Accordingly, the refraction plate accurately separates the electron particles constituting the electron beam. It is formed and arranged so that it can be refracted at an exact angle to reach a certain position on the screen.

Hereinafter, with reference to the accompanying drawings, the specific configuration and operation of the thin CRT according to the present invention will be described in detail.

1 is a perspective view showing the overall shape of a thin CRT according to the present invention, Figures 2 and 3 illustrate the principle that the vertical and horizontal scanning lines are respectively refracted and separated by vertical and horizontal refraction plates in the thin CRT according to the present invention. 4 is a view for explaining the principle that each scanning line is refracted by a reflector.

Referring to FIG. 3, the scanning line radiated from the electron gun is positioned at the bottom of the screen, and is divided into a plurality of vertical scanning lines sequentially by a horizontal refraction plate having a plurality of reflecting mirrors, and refracted at an angle of 90 ° upward. Each of the scanning lines refracted upward by the horizontal refraction plate is located at the rear of the screen as shown in FIG. 2, and is separated into a plurality of horizontal scanning lines by a vertical refraction plate having a plurality of reflecting mirrors, and separated by 90 °. It is refracted and then irradiated onto the screen. As a result, the horizontal / vertical scanning line is sequentially separated by the total number of scanning lines scanned on the entire screen, and the image is displayed on the screen by hitting each pixel of the screen.

Reflectors formed on the horizontal and vertical refraction plates refract the scanning line by two methods, one using mutual repulsive force between anions and cations, or one using optical refraction.

4 illustrates a reflector corresponding to a scan line corresponding to each pixel. In the case of reflectors using mutual repulsion between anions and cations, when the scanning line 1 is scanned, the scanning line 1 scanned by these reflectors is ionized by ionizing the reflector 1 of the horizontal refraction plate at the bottom of the screen and the reflector 1 of the vertical refraction plate at the rear of the screen. Will be refracted. Similarly, when the scanning line 2 is scanned, the second reflecting mirror of the horizontal refraction plate at the bottom of the screen and the second reflecting mirror of the vertical refraction plate at the rear of the screen are ionized to refracted the scanning line 2 scanned to these reflecting mirrors. In the same manner, by sequentially ionizing the reflectors corresponding to all the vertical and horizontal scan lines, such as No. 3 and No. 4, the respective scanning lines incident on the reflecting mirrors can be sequentially refracted.

As described above, the present invention can significantly reduce the distance from the electron gun of the CRT to the screen by deflecting the scanning line in the CRT-type CRT-type CRT-type CRT-type tube, thereby avoiding the step of refraction. By virtue of correctly separating the horizontal and vertical scan line sequentially through there is an advantage that can maintain a clear image quality.

Claims (6)

A CRT having an electron gun emitting an electron beam to display an image, and a screen on which the electron beam emitted from the electron gun is scanned to display an image, First scan line separation and refraction means for sequentially dividing the electron beam emitted from the electron gun into a plurality of vertical scan lines and refracting at a first angle; And And a second scan line separation and refraction means for dividing each vertical scan line separated and refracted by the first scan line separation and refraction means into a plurality of horizontal scan lines and refracting at a second angle to irradiate the screen. Thin tube made of iron. The thin cathode ray tube according to claim 1, wherein the first scanning line separation and refraction means is formed in a step shape and has a number of reflecting mirrors corresponding to the separated vertical scanning lines. The thin cathode ray tube according to claim 1, wherein the second scanning line separation and refraction means is formed in a step shape and has a number of reflecting mirrors corresponding to the separated horizontal scanning lines. The thin cathode ray tube of claim 1, wherein the electron gun is installed at one lower end of the screen, and the first and second angles are each 90 °. The thin cathode ray tube according to any one of claims 2 to 4, wherein the reflecting mirrors form an angle of 45 ° with respect to the incident electron beam or the scanning line. The thin CRT according to any one of claims 2 to 5, wherein the reflectors are sequentially ionized to refract the electron beam or the scanning lines by mutual repulsion between electrons.