Thermal deformation of a tension mask and beam landing shift for a perfectly flat CRT under localized heating

A noncontact optical system that can measure both the vibration characteristics of the shadow mask and the relative distance (Q value) between the shadow mask and the phosphor surface of the glass panel of a cathode ray tube (CRT) is developed. Two position-sensitive detectors (PSDs) were employed to detect the positions of two beams that were reflected by the shadow mask surface and the inner surface of the glass panel. The relative distance between them is critical for the performance of the CRT. The vibration signals obtained from the PSDs were displayed in both temporal domain and spectral domain by using LabView software. The resonance frequencies of 20, 75, 400, and 490 Hz were identified and the low 20 Hz component was responsible for generating discomfort to the human eye.

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Measurement of shadow mask vibration and Q value using two position-sensitive detectors

Bae

Kim

Kang

et al. 2002

Review of Scientific Instruments

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An analysis of a mask vibration considering contact with a damping wire

You

Shin

Jang

2000

IEEE Trans. Consumer Electron.

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Thermal deformation of a tension mask and beam landing shift for a perfectly flat CRT under localized heating

Cited by 2 publications

References 3 publications

Measurement of shadow mask vibration and Q value using two position-sensitive detectors

Measurement of shadow mask vibration and Q value using two position-sensitive detectors

An analysis of a mask vibration considering contact with a damping wire

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