Display device and electronic equipment
AssigneeCanon Kabushiki Kaisha
InventorYu Maehashi
Life of this patent
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Abstract
A display device including pixels and column drivers configured to supply an image signal to the pixels is provided. The column drivers includes: an input node and an output node; an amplifier arranged between the input node and the output node; an offset signal holding unit arranged between the input node and the amplifier and configured to suppress a difference in offset of the amplifier among the column drivers; a current supply unit including a first terminal connected to the input node and a second terminal connected to the output node and configured to supply a current to the output node based on a voltage at the first terminal and the second terminal; and a switch arranged between the input node and the first terminal. The offset signal holding unit and the switch are connected in parallel to the input node.
Claims17
A display device including a plurality of pixels arranged in a matrix and a plurality of column driver circuits configured to supply an image signal to the plurality of pixels,
- wherein each of the plurality of column driver circuits includes:
- (a) an input node and an output node;
- (b) an amplifier arranged between the input node and the output node;
- (c) an offset signal holding unit arranged between the input node and the amplifier and configured to suppress a difference in offset of the amplifier among the plurality of column driver circuits;
- (d) a current supply unit including a first terminal connected to the input node and a second terminal connected to the output node, and configured to supply a current to the output node based on a voltage at the first terminal and a voltage at the second terminal;
- and
- (e) a switch arranged between the input node and the first terminal,
- wherein a current path passing through the offset signal holding unit and a current path passing through the switch are arranged in parallel between the input node and the output node,
- wherein the current supply unit includes a comparator comprising two input terminals, and
- wherein a signal input to one of the two input terminals is associated with a signal input to the first terminal and a signal input to the other of the two input terminals is associated with a signal input to the second terminal.
Dependencies are inferred from the claim text.