KR19980023668A - Exposure equipment for color cathode ray tubes with easy exposure compensation - Google Patents

Abstract

The present invention relates to an exposure apparatus for a color cathode ray tube that is easily compensated for exposure. In an exposure apparatus for a color cathode ray tube, a bracket is formed at a predetermined length on one side of an upper surface of the face plate of the exposure apparatus, and spaced apart from each other in the bracket. The first to third cams installed in a state, the first to third motors installed in a state where rods are connected to one surface of the first to third cams, and a supporting member installed and fixed on one side corresponding to the first to third cams. And a support rod provided on one side of the support member, and a spring installed in the support rod in such a manner that an elastic force acts in the direction of the first to third cams, the panel being rotated in accordance with the rotation of the first to third cams. By exposing in this state, the bending exposure to the RB beam can be easily corrected, and color purity and product quality due to mislanding prevention can be improved.

Description

Exposure equipment for color cathode ray tubes with easy exposure compensation

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exposure apparatus for color cathode ray tubes that is easy to compensate for exposure, and more particularly, to exposure of color cathode ray tubes for easy exposure correction, which makes it possible to easily correct the bending of the RB beam according to the curvature of the panel during exposure. Relates to a device.

In general, the panel of the color cathode ray tube is completed through a number of processes, and there is a screen process for forming three colors of RGB beams on the inner surface of the panel of the color cathode ray tube. After the shadow mask is mounted, it is exposed.

1 and 2 show a conventional exposure apparatus. First, a face plate 16 for fixing and seating a panel 14 having a shadow mask 12 thereon is provided on an upper portion of the exposure apparatus 10. The light source unit 20 having the light source lamp 18 installed thereon is provided at the lower end of the exposure apparatus 10 so as to be vibrated by the swinging device, and the part spaced apart from the light source unit 20 by a certain height. The exposure lens 22 and the correction lens 24 are provided so that the light refracted by the exposure lens 22 can be further refracted to reach both curved surfaces of the panel 14.

In the exposure apparatus 10 configured as described above, first, the light source scanned by the light source lamp 18 reaches each phosphor coated on the inner surface of the panel 14 through the shadow mask 12 to be exposed.

In addition, during the process of reaching the inner surface of the panel 14, the light source first follows the trajectory of the landing electron beam, and passes through the exposure lens 22 and the correction lens 24, It will arrive by correcting the trajectory.

However, the exposure apparatus configured as described above, first, the bending state of the RB beam is formed as shown in FIG. 2, in which the exposure state of this part is attached according to the curvature of the panel. There is no driving device to move in the X-axis direction with respect to the center of the panel to correct the, there is a problem in that the color purity is lowered and the product quality is degraded due to the mixed color due to mis-landing.

The present invention has been made to solve the above problems, it is to be able to easily correct the curved exposure to the R.B beam by moving the panel in accordance with the bending and exposure state of the R.B beam of the panel.

As described above, in the exposure apparatus for a color cathode ray tube, the bracket is formed to have a predetermined length on one side of the upper surface of the face plate of the exposure apparatus, and the first to third cams are installed to be spaced apart from each other in the bracket. First to third motors installed on one surface of the first to third cams, and installed on one side corresponding to the first to third cams, and fixed support members and support rods to one side of the support members. And a spring provided so that the elastic force acts in the direction of the first to third cams in the supporting rod, and the panel is rotated according to the rotation of the first to third cams, and the exposure is performed in such a state so as to expose the RB beam. It is characterized in that the bending exposure can be easily corrected.

1 is a side view showing a conventional exposure apparatus for color cathode ray light;

2 is a plan view illustrating an exposure state of FIG. 1;

Figure 3 is a perspective view showing an exposure apparatus for a color cathode ray tube easy exposure compensation of the present invention

FIG. 4A is a view showing the corrected exposure state shown in FIG. 3, and (B) is a view showing the exposure state by synthesis.

Explanation of symbols for the main parts of the drawings

10: exposure apparatus 12: shadow mask

14 panel 16, 30 face plate

18: light source lamp 20: light source

22: exposure lens 24: correction lens

26: opening 28: filter

32: bracket 34: first cam

36: second cam 38: third cam

40: rod 42: first motor

44: second motor 46: third motor

48: support member 50: support rod

52: spring

3 and 4 are views showing the exposure apparatus for color cathode ray tube easy exposure compensation of the present invention, the same reference numerals as those of FIGS. 1 and 2 denote the same parts, so a description thereof is omitted. Only the differences from FIGS. 1 and 2 will be described.

3 and 4, a filter 28 having an opening 26 in the center thereof is spaced apart from the face plate 30 of the exposure apparatus 10. On one side of the upper surface of the bracket is provided a bracket 32 to form a certain length, the first to third cams (34, 36, 38) are installed in the bracket 32 in a spaced apart state, respectively, On one surface of the first to third cams 34, 36 and 38, first to third motors 42, 44 and 46 with rods 40 are installed and fixed.

In addition, a support member 48 is installed and fixed on one side of the face plate 30 corresponding to the first to third cams 34, 36 and 38, and on one side of the support member 48, A supporting rod 50 is provided at a point horizontally aligned with the first to third cams 34, 36 and 38, and the elastic force is directed in the direction of the first to third cams 34, 36 and 38 in the supporting rod 50. Springs 52 are respectively provided for this action.

The panel 14 is seated between the first to third cams 34, 36 and 38 and the spring 50, and the spring 52 is directed to the first to third cams 34, 36 and 38. As a result of the elastic force acting, one side of the panel 14 is seated in a state of being pressed into and adhered to one surface of the first to third cams 34, 36 and 38.

In the exposure apparatus 10 of the present invention configured as described above, first, the light source scanned by the light source lamp 18 reaches each phosphor coated on the inner surface of the panel 14 through the shadow mask 12 to be exposed. In this case, the panel 14 is formed with a constant curvature so that the RB beams on both sides of the panel 14 are bent.

In the present invention, as shown in FIG. 3 and FIG. 4 attached to correct the curved and formed RB beams as described above, first, the first and the corresponding RB beams according to the state of the curved and formed RB beams of the panel 14 are described. When the first to third motors 42, 44 and 46 are operated, the first to third cams 34, 36 and 38 connected to the first to third motors 42, 44 and 46 respectively rotate in one direction.

At this time, the elastic force of the spring 52 provided on one side of the panel 140 acts in the directions of the first to third cams 34, 36 and 38, so that the side surfaces of the panel 14 are first to third cams 34. When the first to third cams 34, 36 and 38 are rotated in such a state that the first to third cams 34, 36 and 38 are rotated in such a manner, (14) is rotated to a certain angle, if the exposure in the state in which the panel 14 is rotated, the exposure state of the curved RB beam as shown in Figure 4 (a) of the accompanying drawings is corrected As a result, as shown in (b), the exposure state of the RB beam can be vertically formed.

As described above, according to the present invention, the panel is rotated according to the rotation of the first to third cams so as to correspond to the bending state of the RB beam, and the exposure is performed in such a state, thereby making the bending exposure to the RB beam easier. It can be calibrated in addition to improving color purity and product quality due to mislanding prevention.

Claims (1)

An exposure apparatus for a color cathode ray tube, comprising: a bracket provided on one side of an upper surface of the exposure apparatus face plate at a predetermined length; first to first cams spaced apart from each other inside the bracket; First to third motors installed with rods connected to one surface, and installed on one side corresponding to the first to third cams. A fixed support member, a support rod provided on one side of the support member, and an interior of the support rod. The exposure apparatus for a color cathode ray tube with easy exposure compensation characterized in that it consists of a spring provided so that an elastic force may act in the 1st-3rd cam direction.