公开(公告)号：JPS5923434A

公开(公告)日：1984-02-06

申请号：JP13217782

申请日：1982-07-30

Applicant: Toshiba Corp

Inventor： NAKAMURA MICHIO ,  TOKITA KIYOSHI

IPC: H01J29/07 ,  H01J29/00 ,  H01J29/28

CPC classification number: H01J29/006

Abstract: PURPOSE:To prevent the deterioration of the color purity of a picture such as color shift and color uniformity by a heat absorption surface area at the central section of the main surface of a shadow mask using the heat oxidation treatment and a heat reflection surface area at the peripheral section using the metal flame spraying. CONSTITUTION:The entire phosphor screen 4 on the inner surface of a panel 1 is covered with a reflection overlapped layer 10 such as Al and an infrared absorption layer 11 made of carbon particles whose horizontal length is the same as the screen effective length is applied to the central part of this overlapped layer 10. In addition, the entire surface of a mask 5 in which slit holes are arranged in the vertical direction is blackened using the oxidation treatment. On the other hand, infrared reflection layers 13 made of an Al deposition coat whose length is the same as the horizontal effective length of a screen are applied to the horizontal upper and lower sides on the surface of the screen 4 side of the mask 5. As a result, beam landing shift can fully be reduced and the deterioration of the color purity of a picture such as color shift and color uniformity can be prevented.

Abstract translation: 目的：通过使用热氧化处理的荫罩主表面的中央部的吸热面积和热反射面积来防止图像的色纯度劣化，例如色偏和颜色均匀性 周边部分采用金属火焰喷涂。 构成：面板1的内表面上的整个荧光屏4被覆盖有诸如Al的反射重叠层10和由碳颗粒制成的红外线吸收层11，其水平长度与屏幕有效长度相同 该重叠层10的中心部分。另外，使用氧化处理使在垂直方向上布置有狭缝孔的掩模5的整个表面变黑。 另一方面，在掩模5的屏幕4侧的表面上的水平上下侧施加由Al沉积涂层制成的长度与屏幕的水平有效长度相同的红外反射层13。 结果，可以完全降低光束起落偏移，并且可以防止诸如色偏和颜色均匀性的图像的色纯度的恶化。