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Method for improving white field level of color picture tubes

A technology of color picture tube and white field, applied in the field of picture tube, to achieve quick results, less investment, and improved screen quality

Inactive Publication Date: 2010-02-17
IRICO DISPLAY DEVICES
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  • 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 level of color picture tubes
  • Method for improving white field level of color picture tubes
  • Method for improving white field level of color picture tubes

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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 level of color picture tubes. The method comprises the following steps: parallelly moving a shadow mask from a first position to a second position to lead the distance from the shadow mask to the inner surface of a screen to be diminished by 0.3-0.5mm; keeping system parameters of a lighthouse lens unchangeable to lead the distance betweena red light source and a blue light source to be increased from S1 to S2, to lead a phosphor powder arrangement L1 to be a standard state; adjusting the red light source and the blue light source andcarrying out convergence by a red and blue electron beam arrangement L2. The invention reduces the space between the screen and the shadow mask to lead a black base arrangement to be restored the state before the screen and the shadow mask are adjusted, thus improving matching properties of the black base arrangement and the electron beam arrangement L2, and improving the picture quality of the color picture tubes.

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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IPC IPC(8): H01J31/20H01J31/12H01J9/00
Inventor 程治国俞敏赵军赵天有薛小健鲁小平
Owner IRICO DISPLAY DEVICES
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