Image display circuitry and mobile electronic device
First Claim
1. An image display circuitry, comprising:
- a first frame buffer for storing first image data;
a second frame buffer for storing second image data supplied from a camera;
a third frame buffer for storing logical combining data to be used for combining said first and second image data pixel by pixel; and
a combining circuit for combining said first and second image data by use of said logical combining data;
wherein;
a data bus and an address bus, each of which is connected to said first and third frame buffers, are separate and independent of a data bus and an address bus which are connected to said second frame buffer;
said data bus and said address bus, each of which is connected to said first and third frame buffers, are time-sharingly controllable from outside independently of said data bus and said address bus which are connected to said second frame buffer; and
said first and second image data and said logical combining data are time-sharingly stored and combined in said combining circuit, for one frame within one period of a vertical synchronizing signal for said second image data.
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Accused Products
Abstract
An image display circuitry comprises frame buffers 32-34 for storing image data DTAW, DTRW and logical combining data DTCW respectively, and a combining circuit 46. Data buses and address buses of the frame buffers 32 and 34 are time-sharingly controllable from an MPU independently of those of the frame buffer 33. Each frame of the image data DTRW is synchronized with a vertical synchronizing signal, and stored to the frame buffer 33. Each frame of the image data DTAW and the logical combining data DTCW is separately and independently stored to the frame buffers 32 and 34 by the MPU within a storage period of a corresponding frame of the image data DTRW. The combining circuit 46 combines image data DTAR and DTBR pixel by pixel on the basis of logical combining data DTCR within a specified period during a vertical retrace period.
25 Citations
20 Claims
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1. An image display circuitry, comprising:
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a first frame buffer for storing first image data;
a second frame buffer for storing second image data supplied from a camera;
a third frame buffer for storing logical combining data to be used for combining said first and second image data pixel by pixel; and
a combining circuit for combining said first and second image data by use of said logical combining data;
wherein;
a data bus and an address bus, each of which is connected to said first and third frame buffers, are separate and independent of a data bus and an address bus which are connected to said second frame buffer;
said data bus and said address bus, each of which is connected to said first and third frame buffers, are time-sharingly controllable from outside independently of said data bus and said address bus which are connected to said second frame buffer; and
said first and second image data and said logical combining data are time-sharingly stored and combined in said combining circuit, for one frame within one period of a vertical synchronizing signal for said second image data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile electronic device, comprising:
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an image display circuitry comprising;
a first frame buffer for storing first image data;
a second frame buffer for storing second image data;
a third frame buffer for storing logical combining data to be used for combining said first and second image data pixel by pixel; and
a combining circuit for combining said first and second image data by use of said logical combining data;
a camera for supplying said second image data to said image display circuitry; and
a display for displaying image data supplied from said image display circuitry, wherein;
a data bus and an address bus, each of which is connected to said first and third frame buffers, are separate and independent of a data bus and an address bus which are connected to said second frame buffer;
said data bus and said address bus, each of which is connected to said first and third frame buffers, are time-sharingly controllable from outside independently of said data bus and said address bus which are connected to said second frame buffer; and
said first and second image data and said logical combining data are time-sharingly stored and combined in said combining circuit, for one frame within one period of a vertical synchronizing signal for said second image data. - View Dependent Claims (12, 13, 14)
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15. A mobile electronic device, comprising:
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a camera for generating image data to be displayed;
a circuit for processing said image data supplied from said camera to provide processed image data, and generating an address signal to determine a storage address of said processed image data;
a frame buffer for storing said processed image data at said storage address;
a data bus for transferring said processed image data from said processing circuit to said frame buffer; and
a display for displaying an image by use of said processed image data read from said frame buffer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification