Cathode ray tube with shadow mask frame
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKiyotaka Nakase, Yuichi Kimura
Life of this patent
Estimating the term…
Abstract
The present invention provides a color cathode ray including a pair of long frames, a pair of opposing short frames that are fixed to the pair of long frames and support the long frames, and a shadow mask fixed to the pair of long frames in a state applied with a tensile force. The short frames have substantially-triangular bent parts formed to protrude toward the shadow mask. Since such a cathode ray tube can decrease an internal moment of the shadow mask structure, the displacement of the shadow mask in a direction to recede from the phosphor screen surface of the color cathode ray tube can be suppressed and the q-value deviation also can be suppressed even if the shadow mask is expanded by heat generated by an impact of electron beams.
Claims8
A color cathode ray tube comprising:
- a pair of long frames,
- a pair of opposing short frames that are fixed to the pair of long frames and support the long frames, and
- a shadow mask fixed to the pair of long frames in a state applied with a tensile force,
- wherein the short frames have substantially-triangular bent parts formed to protrude toward the shadow mask.
Dependencies are inferred from the claim text.