Display apparatus having means for generating a test signal on the display to facilitate adjustment of a property of the displayed image
First Claim
1. A video signal processing apparatus comprising means for generating video signals to enable the display of still or motion pictures on a connected display device, and means for generating a test signal to enable the display of a test image to facilitate user adjustment of a property of the display device to a correct setting which provides optimum representation of the said pictures, characterized in that the test image includes a first image feature imperceptible at the correct setting, but visible when the display device deviates in a given direction from the correct setting, and in that the first image feature when visible forms at least part of a symbolic instruction to the user indicating the nature of the deviation and/or the necessary corrective adjustment.
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Accused Products
Abstract
The display apparatus includes circuitry for generating video signals for the display of still or motion pictures on a CRT or other display device. The apparatus further includes an arrangement for generating a test signal to display a test image to facilitate adjustment of the brightness (black level) setting of the CRT. The test image includes adjoining regions (100,102) of black and below-black levels, to forming a first image feature which is invisible at the correct brightness setting. If the brightness setting is too high, the first image feature is visible and forms a symbolic instruction indicating the necessary corrective adjustment. The test signal may be stored with picture information on a storage device.
56 Citations
12 Claims
- 1. A video signal processing apparatus comprising means for generating video signals to enable the display of still or motion pictures on a connected display device, and means for generating a test signal to enable the display of a test image to facilitate user adjustment of a property of the display device to a correct setting which provides optimum representation of the said pictures, characterized in that the test image includes a first image feature imperceptible at the correct setting, but visible when the display device deviates in a given direction from the correct setting, and in that the first image feature when visible forms at least part of a symbolic instruction to the user indicating the nature of the deviation and/or the necessary corrective adjustment.
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8. A method of storing pictures on a record carrier for subsequent reproduction via a display device having at least one user-adjustable display property, the method comprising:
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(a) storing picture information on the record carrier in a form suitable for reproduction by the display device; (b) defining a test signal suitable for causing the display of a test image including a first image feature imperceptible at a display property setting which is correct for the display of the stored pictures but visible when the display property deviates in a given direction from the said correct setting; and (c) storing information defining the test signal on the record carrier together with the picture information, characterised in that the first image feature, when visible, forms at least part of a symbolic instruction to the user indicating the nature of the deviation and/or the necessary corrective adjustment. - View Dependent Claims (9, 10, 11, 12)
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Specification