Color cathode ray tube
AssigneeLG.Philips Display Korea Co., Ltd.
InventorsJae-Seung Baek, Yong-Hoon Choi
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Abstract
A color CRT comprising a panel having a substantially flat outer surface and an inner surface having a certain curvature, and a mask having a plurality of electron beam passing holes, wherein an effective surface diagonal size of the panel is not greater than about 534 mm, wherein a central portion transmittance rate is within the range of about 45–75%, wherein the panel satisfies the condition 1.1≦(Rxs/Ryc)≦4.6, wherein Rxs is defined as an inner curvature radius along an edge of a longer side of the panel, and wherein Ryc is defined as an inner curvature radius along a line in the center of the panel parallel to the shorter side of the panel.
Claims33
A color CRT comprising:
- a panel having a substantially flat outer surface and an inner surface having a certain curvature;
- and
- a mask having a plurality of electron beam passing holes;
- wherein an effective surface diagonal size of the panel is not greater than about 534 mm;
- wherein a central portion transmittance rate is within the range of about 45–75%;
- wherein the panel satisfies the condition 1.5≦(Rxs/Ryc)≦3.3;
- wherein Rxs is defined as an inner curvature radius along an edge of a longer side of the panel;
- and
- wherein Ryc is defined as an inner curvature radius along a line in the center of the panel parallel to the shorter side of the panel.
A color CRT comprising:
- a panel having a substantially flat outer surface and an inner surface having a certain curvature;
- and
- a mask having a plurality of electron beam passing holes;
- wherein an effective surface diagonal size of a panel is not greater than about 534 mm;
- wherein the panel satisfies the following condition 1.5≦(Rxs/Ryc)≦3.3;
- wherein Rxs is defined as an inner curvature radius along an edge of a longer side of the panel;
- and
- wherein Ryc is defined as an inner curvature radius along a line in the center of the panel parallel to the shorter side of the panel.
A color CRT comprising:
- a panel having a substantially flat outer surface and an inner surface having a certain curvature;
- and
- a mask having a plurality of electron beam passing holes;
- wherein an effective surface diagonal size of a panel is not greater than about 534 mm;
- wherein the panel satisfies one of the conditions (0.4*Zd)≦Zy≦(0.6*Zd) and (0.4*Zd) ≦Zx≦(0.6*Zd);
- wherein Zd is height difference between a point on the inner surface of the panel at the central point and a point on the inner surface of the panel at the corner of the effective area of the panel;
- wherein Zy is height difference between a point on the inner surface of the panel at the central point and a point on the inner surface of the panel at the center of the longer edge of the effective area of the panel;
- and
- wherein Zx is height difference between a point on the inner surface of the panel at the central point and a point on the inner surface of the panel at the center of the shorter edge of the effective area of the panel;
- wherein the panel satisfies the following condition 0.22*Zd≦Z(d/2)≦0.26*Zd, wherein Z(d/2) is height difference between a point on the inner surface of the panel at the central point and a point on the inner surface of the panel halfway between the central point and the corner of the effective area of the panel.
Dependencies are inferred from the claim text.