Image-casting control method for image display device and image display device
AssigneeNEC Corporation
InventorsNOBUYA SEKO, YOSHINORI TOMIHARI
Life of this patent
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Abstract
An image display device incorporating a quick-action electron source is disclosed. After the power source of the device is turned on, drive signals are outputted from an RGB output circuit to each of the RGB electron sources after it is detected that sufficient deflection current is flowing from horizontal/vertical deflection circuit to the deflection yoke to enable the electron beam to adequately scan the screen.
Claims8
An image-casting control method for an image display device that incorporates a quick-action electron source comprising the steps of:
- turning on the main power source of said image display device;
- detecting that an electron beam deflection system has reached a steady operating state;
- and
- supplying drive signals corresponding to image input signals to the electron source when it is detected that said electron beam deflection system has reached a stationary operating state.
An image display device incorporating a quick-action electron source, comprising:
- an RGB output circuit that outputs drive signals corresponding to image input signals to each of RGB electron sources;
- an RGB pre-amplifier that amplifies RGB image input signals and outputs to said RGB output circuit;
- a horizontal/vertical deflection output circuit;
- and
- a deflection current sensing circuit that drives said RGB output circuit or said RGB pre-amplifier upon detecting that sufficient deflection current is flowing from said horizontal/vertical deflection output circuit to a deflecting yoke to enable an electron beam to adequately scan a screen.
An image display device incorporating a quick-action electron source, comprising:
- an RGB output circuit that outputs drive signals corresponding to image input signals to each of RGB electron sources;
- an RGB pre-amplifier that amplifies RGB image input signals and outputs to said RGB output circuit;
- a horizontal/vertical deflection output circuit;
- and
- a system control circuit that, after the main power source of the device is turned on, drives said horizontal/vertical output circuit and supplies a deflection current to a deflecting yoke, and, when a sufficient deflection current is flowing to enable an electron beam to adequately scan a screen, drives said RGB output circuit or said RGB pre-amplifier.
Dependencies are inferred from the claim text.