Method for reparing plug bore of shadow mask in color diaplay tube
A color picture tube and plugging technology, which is applied in the direction of defective lamp tube/lamp repair/regeneration, recycling technology, non-luminescent electrode manufacturing, etc., can solve the problems of slow repair speed, poor effect, poor repair quality, etc., to achieve The effect of improving repair rate, reducing bad hole plugging and improving product quality
Inactive Publication Date: 2006-06-28
IRICO DISPLAY DEVICES +1
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- Application Information
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Problems solved by technology
The existing plugging repair machine has only one red R gun bombardment current can control the plugging foreign matter of the shadow mask of the repair color picture tube or display tube. Slow repair speed, poor repair quality, poor effect and other defects
Method used
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Embodiment Construction
[0012] Accompanying drawing is the specific embodiment of the present invention.
[0013] Below in conjunction with accompanying drawing, content of the present invention will be further described:
[0014] refer to figure 1 It can be seen from the basic principle of color picture tube or display tube that the shadow mask plays the role of color selection. The three beams of electrons emitted from the electron guns R, G, and B converge on the shadow mask holes, and then separate and hit their respective electrons. On the phosphor powder, three-color fluorescent strips are displayed. The role of the shadow mask is to ensure the directionality of the R, G, and B beams of electrons. If the holes of the shadow mask are smooth and there are no foreign objects blocking the holes, it is ideal for the electrons to converge and separate However, in the actual production process, shadow mask hole blocking foreign matter may exist on the large hole side or the small hole side of the sha...
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The preparing method is carried out according to following steps. Under white field, foreign matters on locked holes are observed from the screen face and corresponding markers are made. If a bigger shadow mask hole is chocked up fully, the current in anyone of R, B, G electron guns is selected to bomb the foreign matter on the locked hole. For tiny foreign matter, the current in red R or blue B electron gun is selected to bomb the foreign matter. If foreign matters on a shadow mask locked hole are on the side of macropore, distributed on at 1, 2, 3 locked hole positions, then R electron gun is selected for bombing position 1, B gun for position 3 and anyone of R, B, G electron guns can be selected for the position 2. The fixing method makes the repair rate raise greatly, and save the repair time and increase the product quantity
Description
1. Technical field [0001] The invention relates to a method for repairing hole blocking of a shadow mask, and is particularly suitable for repairing hole blocking by foreign matter on the shadow mask hole of a color picture tube or a display tube. 2. Background technology [0002] In the color picture tube or display tube, use the electron gun beam of the color picture tube or display tube to scan and irradiate the shadow mask of the color picture tube or display tube in an all-round way. The electron gun beam irradiates the foreign matter in pulses, thereby heating and removing the foreign matter blocking the hole. The existing plugging repair machine has only one red R gun bombardment current can control the plugging foreign matter of the shadow mask of the repair color picture tube or display tube. Slow repair speed, poor repair quality, poor effect and other defects. 3. Contents of the invention [0003] The purpose of the present invention is to provide a color pict...
Claims
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IPC IPC(8): H01J9/14H01J9/50
CPCY02W30/82
Inventor 刘洵刘武君李向阳王建平
Owner IRICO DISPLAY DEVICES