Image display apparatus in which a specific area display attribute is modifiable
First Claim
1. An image display apparatus in which a display attribute of a specific area of a display of the display apparatus is modifiable based on an image signal input from an information processor, vertical and horizontal synchronization signals, and position information and display attribute information of the specific area, comprising:
- a resolution determination circuit which determines the resolution of the specific area of the display, based on the input vertical and horizontal synchronization signals,a dot clock generation circuit which generates dot clocks by multiplying the horizontal synchronization signal according to the determined resolution of the image,a horizontal display period detection circuit which detects a horizontal display period in one horizontal synchronization signal, using a signal in the image signal input from the information processor,dot clock counting circuit which actually counts the number of the dot clocks detected in the horizontal display period,a dot clock standard value reading circuit which reads a standard value of the number of the dot clocks in the horizontal display period in a line at the determined resolution of the displayed image, anda correction circuit receiving inputs from the dot clock counting circuit and the dot clock standard value reading circuit and correcting the multiplication number in the dot clock generation circuit so that the actually counted dot clock number is identical to the standard value.
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Accused Products
Abstract
In an image display apparatus in which a display attribute of a specific area of the display can be modified based on an information input from a processor, a resolution of the image is determined from the input vertical and horizontal synchronization signals, dot clocks are generated by multiplying the horizontal synchronization signals depending on the determined resolution, a horizontal display period in one horizontal synchronization signal is detected using a signal in the image signals input from the processor, the actual count value of the dot clocks in the detected horizontal display period is compared with a standard value thereof in the horizontal display period in one line at the determined resolution of the image and the multiplication number of a dot clock generation circuit is corrected so that the count value coincides with the standard value to modify the display attribute of the specific area of the display.
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Citations
8 Claims
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1. An image display apparatus in which a display attribute of a specific area of a display of the display apparatus is modifiable based on an image signal input from an information processor, vertical and horizontal synchronization signals, and position information and display attribute information of the specific area, comprising:
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a resolution determination circuit which determines the resolution of the specific area of the display, based on the input vertical and horizontal synchronization signals, a dot clock generation circuit which generates dot clocks by multiplying the horizontal synchronization signal according to the determined resolution of the image, a horizontal display period detection circuit which detects a horizontal display period in one horizontal synchronization signal, using a signal in the image signal input from the information processor, dot clock counting circuit which actually counts the number of the dot clocks detected in the horizontal display period, a dot clock standard value reading circuit which reads a standard value of the number of the dot clocks in the horizontal display period in a line at the determined resolution of the displayed image, and a correction circuit receiving inputs from the dot clock counting circuit and the dot clock standard value reading circuit and correcting the multiplication number in the dot clock generation circuit so that the actually counted dot clock number is identical to the standard value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of modifying a display attribute of a specific area of a display based on an input image signal input, input vertical and horizontal synchronization signals, and input position information and display attribute information of the specific area, comprising:
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determining the resolution of the specific area of the display, based on the input vertical and horizontal synchronization signals, generating dot clocks by multiplying the horizontal synchronization signal according to the determined resolution of the image, detecting a horizontal display period in one horizontal synchronization signal, using a signal in the image signal input from the information processor, actually counting the number of the dot clocks detected in the horizontal display period, reading a standard value of the number of the dot clocks in the horizontal display period in a line at the determined resolution of the displayed image, and correcting a multiplication number in a dot clock generation circuit so that the actually counted dot clock number is identical to a standard value.
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Specification