Image display apparatus and driving method thereof
First Claim
Patent Images
1. An image display apparatus having a display unit for displaying an image and a drive unit for driving this display unit, the drive unit being connected by a plurality of signal lines, wherein:
- said display unit consists of a plurality of display pixels arranged in a matrix form, and said drive unit has a ladder resistor, impedance converters connected to the ladder resistor, gray level voltage wires constituting output lines from the impedance converters, and a gray level voltage selector connected to the gray level voltage wires.
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Abstract
A display drive circuit has impedance converters between gray level voltage wires and a ladder resistor. At the time of writing analog image signal voltages onto signal lines, the writing can be done in three separate phases.
17 Citations
20 Claims
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1. An image display apparatus having a display unit for displaying an image and a drive unit for driving this display unit, the drive unit being connected by a plurality of signal lines, wherein:
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said display unit consists of a plurality of display pixels arranged in a matrix form, and said drive unit has a ladder resistor, impedance converters connected to the ladder resistor, gray level voltage wires constituting output lines from the impedance converters, and a gray level voltage selector connected to the gray level voltage wires. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18)
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16. An image display apparatus driving method for displaying an image by writing analog image signal voltages via signal lines into pixel capacitances of individual pixels in a display unit, wherein the analog image signal voltages are written in three separate phases when the analog image signal voltages are to be written onto the signal lines.
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19. A driving method for an image display apparatus having a plurality of display pixels arranged in a matrix form to display an image, a group of signal lines provided for each column to transmit analog image signals and connected to the display pixels, and a drive circuit for driving the display pixels and the group of signal lines at prescribed timings, and writing the analog image signal voltages into the pixel capacitances of the display pixels to display an image, wherein:
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said drive circuit has a ladder resistor and a plurality of gray level voltage wires connected to the ladder resistor;
said group of signal lines are connected to said gray level voltage wires via a gray level voltage selector;
each gray level voltage wire is connected to the ladder resistor via impedance converters;
at least the display pixels, the group of signal lines, the gray level voltage selector and the gray level voltage wires are provided over the same substrate; and
the analog image signal voltages are written in three separate phases when the analog image signal voltages are to be written onto the signal lines.
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20. An image display terminal system, comprising:
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a plurality of display pixels arranged in a matrix form to display an image;
a group of signal lines provided for each column to transmit analog image signals and connected to the display pixels;
a drive circuit for driving the display pixels and the group of signal lines at prescribed timings; and
means for causing the display pixels to display an image in a prescribed sequence on the basis of inputted image display data, wherein;
said drive circuit has a ladder resistor and a plurality of gray level voltage wires connected to the ladder resistor;
said group of signal lines are connected to the gray level voltage wires via a gray level voltage selector;
each gray level voltage wire is connected to the ladder resistor via impedance converters; and
at least the display pixels, the group of signal lines, the gray level voltage selector and the gray level voltage wires are provided over a single substrate.
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Specification