MXPA97003059A - Appliance for rayoscatodi tube panel exposure - Google Patents

Abstract

The present invention relates to an apparatus for exposing the cathode ray tube (CRT) panel to expose CRT panels of different sizes. The CRT exposure apparatus includes a base frame, a light source installed in the base frame, a movement frame installed on the light source, having a first hole, a movement device for moving the motion frame with respect to to the base frame, an exposure lens installed between the light source and the motion frame to control an angle of radiation light from the light source, an auxiliary frame having a second hole and corresponding to the first hole of the motion frame , the second hole is smaller than the first hole, the subframe is installed in the movement frame to be removable, to control the distance between the panel on which it rests and the light source. Therefore, the exposure apparatus can easily expose panels of various sizes using one of various auxiliary frames within a short period of time.

Description

APPARATUS FOR EXPOSURE OF CATHODE RAY PIPE PANEL BACKGROUND PE THE INVENTION The present invention relates to an exposure apparatus for forming a black matrix on an interior surface of a cathode ray tube (CRT) panel and more particularly to an apparatus CRT panel exposure, to easily expose CRTs that have different sizes, using an exposure apparatus. In general, when the black matrix is formed on the inner surface of the CRT panel, an exposure apparatus is used as illustrated in Figure 1. The exposure apparatus includes a light source 3 installed in a base frame 2, for irradiating light to the inner surface of the panel l, an exposure lens 4 installed between the panel 1 and the light source 3, to control the angle of light reaching the panel 1, a movement frame 6, to support the panel l , and movement means for moving the frame 6. With reference to Figure 2, a distance d between the panel 1 and the light source 3, should be controlled according to the size of the panel 1. For example, the distance d between panel 1 and light source 3 must be larger in a panel 50. 8 sm (20M) than in a 35.6 cm (14H) panel. As illustrated in Figure 1, the movement means include a fixed motor 11 in the base frame 2, a threaded shaft 12, connected to an arrow of the motor 11, a REF: 24465 nut member coupled with the threaded shaft 12, while a slide 14, fixed to the bottom surface of the movement frame 6, and a guide 15 fixed to the base frame 6, is fixed to the movement frame 6, to direct the slide 14. Means of movement using the constituents above reciprocate the movement frame 6 in a longitudinal direction of the threaded shaft 12 using the rotational force of the motor 11. Three cushions 7 are installed around a hole 5 formed in the movement frame 6 and the panel 1 is placed on the cushion 7. The thickness of the cushions 7 is predetermined considering the distance d between the light source 3 and the panel 1. As is well known, the panel 1 moves using the movement means, in order to form a black matrix 8. cor responding to three colors on the inner surface of the panel 11. Also, the reason for placing the panel l on the cushions 7 is to compensate for the difference in flatness between the lower surface of the panel 1, which contacts the motion frame 6 and the surface upper of the movement frame 6, when the panel 1 is placed in a movement frame 6. The above-described conventional exposure apparatus has no problem when panels of 50.8 is (20n) and 53.34cm (21") are exposed. That is, when a 53.34 cm (21") panel is exposed after a 50.8 cm (20") panel, the thickness of the cushions 7 is suitably increased to adjust the distance between the 53.34 cm (21") panel. and the light source 3. However, when a 53.34 cm (21") panel is to be exposed after exposing a 35.56 cm (14") panel the thickness of the cushions 7 must be increased significantly. Light enters the exposure apparatus from the outside, such that irregular reflection is caused and the size of the hole 5 provided in the motion frame 6 is relatively lowered by providing failure during exposure According to the conventional exposure apparatus the frame 6 must be detached from the base frame%, to be replaced by another frame of a different size Here, when the movement frame 6 is exchanged, other parts around the movement frame 6 must also be detached, in such a way It takes a lot of time and effort. COMPENDIUM DB THE INVENTION An object of the present invention is to provide an exposure apparatus whose structure is improved to easily expose panels of different sizes within a short period of time.

To achieve the above objective, a panel exposure apparatus for cathode ray tube (CRT) is provided including: a base frame; a light source installed in the base frame; a movement frame installed on the light source, having a first hole; movement means for moving the movement frame with respect to the base frame; an exposure lens installed between the light source and the motion frame, to control an angle of light irradiation from the light source; an auxiliary frame having a second hole corresponding to the first hole of a movement frame, the second hole is smaller than the first hole, the auxiliary frame is installed in the movement panel to be detached, in order to control the distance between the panel to settle there, and the light source. Also, the subframe of the CRT panel display can be replaced by another subframe that changes the distance between the panel and the light source, according to the size of the panel. In addition, the means of movement comprise: a motor mounted on the base frame; a threaded arrow connected to an arrow of the motor; a nut member coupled with the threaded shaft while being installed in the movement frame; a slide installed in the movement frame and a guide mounted on the base frame to direct the slide in a longitudinal direction of the threaded shaft. The exposure apparatus having the above constituents of the present invention can easily perform the operation of exposing panels of varying size within a short period of time. BRIEF DESCRIPTION OF THE DRAWINGS The above object and advantages of the present invention will be more apparent when describing in detail a preferred embodiment thereof, with reference to the accompanying drawings in which: FIGURE 1 is a perspective view of an exposure apparatus conventional; FIGURE 2 is a view schematically illustrating the exposure apparatus illustrated in FIGURE 1; and FIGURES 3 and 4 are perspective views of an exposure apparatus according to the present invention. n? firptprtOi? r. rAt.t_ r * nB THE INVENTION An exposure apparatus illustrated in Figure 3 includes a light source 130 installed in a base frame 120 for radiating light to the interior surface of a panel 101, an exposure lens 140 installed between the light panel 101 and light source 130 for controlling the angle at which light reaches panel 101, a frame 160 for supporting panel 101, and movement means for moving the motion frame 160. The distance (d of the Figure 2) between panel 101 and light source 130, is different according to size 101 as described above. For example, the distance should be different from a 35.56 cm (14") panel, a 50.8 cm (20") panel, and a 53.34 cm (21") panel. The exposure apparatus of the present invention is characterized by having an auxiliary frame 161. This is, in order to properly adjust the distance between the panel 101 and the light source 130 according to the size of the panel 101, various auxiliary frames 161 which they have different thicknesses, they are installed to be easily replaced One of a plurality of auxiliary frames 161 is provided according to the size of the panel 101 to be exposed For example, the auxiliary frame 161 illustrated in Figure 3, is to expose a panel of 35.56 cm (14") or a 38.1 cm (15") panel and a 161 'auxiliary frame illustrated in Figure 4, which extends the distance of the panel 101 from the light source 130 is to expose one of 50.8 cm (20") or 53.34 ca (21") Now c With reference to Figures 3 and 4, three cushions 170 and 170 'are installed around second holes 162 and 162' formed in the auxiliary frames 161 and 161 '., respectively. The panel 101 is placed on the cushions 170 and 170 ', respectively. The thickness of the cushions 170 and 170 'is determined previously considering the distance of the light source 130 to the panel 101. The frame 160 has a first hole 163, and the auxiliary frames 161 and 161', each have the second holes 162. and 162 ', respectively, are installed on the first hole 163. In this way, the light emitted from the light source 130 passes through the first and second holes 163 and 162 (162'), to reach the panel 101 and the The size of the second hole 162 (162 ') is smaller than that of the first hole 162. The auxiliary frames 161 and 161' on which the panel 11 rests, are fixed in the movement frame 160, by a plurality of screws 164. In this way, the auxiliary frames 161 and 161 'and the panel 101 move in conjunction with the movement frame 160, as the motion frame 160 moves in the base frame 120 using the movement means. The movement means includes a motor 111 fixed in the base frame 120, a threaded shaft 112 connected to an arrow of the motor 111, a nut member 113 coupled with the threaded shaft 112, while a sliding member is fixed to the moving frame 130. 114 fixed to the outer surface of the movable frame 160, and a guide 115 fixed to the base frame 120 to direct the slider 114. Movement means using the above constituents reciprocate the movement frame 160 in a longitudinal direction of the threaded shaft 112 , using a rotational force of the motor 111. In the exposure apparatus of the present invention, when a 50.8 cm (20") panel is to be exposed after exposing a 35.56 cm (14") panel, the subframe 161 illustrated in Figure 3 it is replaced by the auxiliary frame 161 'illustrated in Figure 4. Also, when the exposure object is changed from a 50.8 cm (20") panel to a 53.34 cm (21") panel, the distance from the light source 130 to the 53.34 cm (21") panel is suitably adjusted by increasing the thickness of the cushions 170 '. As described above, the exposure apparatus of the present invention can easily expose panels of various sizes using auxiliary frames each with different ones within a short period of time. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, the content of the following is claimed as property:

Claims (4)

1. CLAIMS 1.- An apparatus for exposing the cathode ray tube (CRT) panel, characterized in that it includes: a base frame; a light source installed in the base frame; a movement frame installed on the light source, having a first hole; movement means for moving the movement frame with respect to the base frame; an exposure lens installed between the light source and the motion frame, for controlling an angle of irradiation light from the light source; an auxiliary frame having a second hole corresponding to the first hole of a moving frame, the second hole is smaller than the first hole, the auxiliary frame is installed in the moving frame to be removable, to control the distance between the panel on which it rests and the light source.
2. 2. An apparatus for exposing the CRT panel according to claim 1, characterized in that the auxiliary frame can be replaced by another auxiliary frame that changes the distance between the panel and the light source according to the size of the panel.
3. 3. An apparatus for exposing the CRT panel according to claim 1, characterized in that the movement means comprise: a motor mounted on the base frame; a threaded arrow connected to an arrow of the motor; a nut member coupled with the threaded shaft while being installed in the movement frame; a slide installed in the movement frame; and a guide mounted on the base frame to direct the slide in a longitudinal direction of the threaded shaft.
4. 4. An apparatus for exposing the CRT panel according to claim 2, characterized in that the movement means comprise: a motor mounted on the base frame; a threaded arrow connected to an arrow of the motor; a nut member coupled with the threaded shaft, while being installed in the motion frame; a slide installed in the movement frame; and a guide mounted on the base frame to direct the slide in a longitudinal direction of the threaded shaft.