发明名称 |
Television picture tube having enhanced resolution and color purity |
摘要 |
A color television receiver system has a cathode ray picture tube including an imaging faceplate having deposits of multi-color phosphor targets thereon. The tube includes a three-beam electron gun and a color selection aperture mask having apertures in registration with the targets. A beam-current-control signal is derived from the scansion circuit means of the receiver system; the amplitude of the signal varies monotonically as a function of the distance of the beams from the center of the faceplate. Means are provided for receiving the beam-current-control signal for modulating the receiver system luminance signal with the beam-current-control signal, which has such characteristics that the modulation causes a predetermined gradational reduction in beam current as a function of the distance of the beam from the center of the faceplate. The benefits include enhanced color purity and improved resolution, and energy savings.
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申请公布号 |
US4196446(A) |
申请公布日期 |
1980.04.01 |
申请号 |
US19780963533 |
申请日期 |
1978.11.24 |
申请人 |
ZENITH RADIO CORP |
发明人 |
ROWE, WILLIAM A;SCHWARTZ, JAMES W |
分类号 |
H04N5/57;H04N9/20;(IPC1-7):H04N9/18;H01J29/52;H01J29/56 |
主分类号 |
H04N5/57 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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