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Method for improving white field grade of tricolor picture tube

A color picture tube, white field technology, applied in the field of picture tubes, to achieve the effect of improving the landing quality, improving the picture quality, and taking effect quickly

Inactive Publication Date: 2009-10-28
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Only suitable for use in color picture tube design

Method used

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  • Method for improving white field grade of tricolor picture tube
  • Method for improving white field grade of tricolor picture tube
  • Method for improving white field grade of tricolor picture tube

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Embodiment Construction

[0032] The present invention is described in further detail below in conjunction with accompanying drawing:

[0033] see Figure 1-2 , 3-a, 3-b, 4-a, 4-b, 4-c, 5, 6, a method for improving the white field level of a color picture tube, the method follows the steps:

[0034] (1) Adjust the distance between the shadow mask and the screen to the standard state, move the shadow mask from the first position 2 of the shadow mask to the second position 3 of the shadow mask in parallel, and reduce the distance between the shadow mask and the inner surface of the screen 1 by 0.3 -0.5mm; the distance from the shadow mask to the inner surface of the screen 1 decreases, because the distances between the phosphor strips are not equal, at this time the phosphor arrangement L1 at the circle will converge, that is, red (R), green (G), The distance within the blue (B) group is smaller than the distance between the groups, and the distance between the normal fluorescent powder arrangement L1 f...

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Abstract

The invention discloses a method for improving white field grade of a tricolor picture tube. The method comprises the following steps: moving a shadow mask from a first position to a second position in parallel to shorten the distance from the shadow mask to the surface in a screen to 0.3-0.5mm; maintaining parameters of a lighthouse lens system to increase the distance between a red light source and a blue light source from S1 to S2 and lead fluorescent powder assortment L1 into the standard state; adjusting the red light source and the blue light source through tunable clustering of red and blue electron beam assortment L2. The method reduces the clearance between the screen and the shadow mask, and restores the black matrix assortment to the state before adjusting the clearance between the screen and the shadow mask, thereby improving the matching property of the black matrix assortment and the electron beam assortment L2, and improving the image quality of the tricolor picture tube.

Description

Technical field: [0001] The invention or the utility model belongs to the field of picture tubes, and relates to a method for improving the white field level of a color picture tube. Background technique: [0002] The color fluorescent screen 1 is the color rendering element of the shadow mask type color picture tube, and it is on the inner side of the glass screen 1 of the color picture tube. And arranged according to certain rules, its function is to perform electro-optical conversion and complete the task of displaying images. [0003] The shadow mask in the color picture tube is a thin steel plate with tens of thousands of small slots on it. It is fixed on the pin of the fluorescent screen 1 by a spring plate and is close to the fluorescent screen 1. It is the color selection mechanism of the shadow mask type color picture tube. The purpose of color selection is achieved through the geometrical position between the shadow mask and the phosphor screen 1 . [0004] The d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/00H01J31/20H01J31/12
Inventor 陶定原吕军顺边辉翟宏峰
Owner IRICO
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