Self-compensating circuit for faulty display pixels
AssigneeX-Celeprint Limited
InventorRobert R. Rotzoll
Life of this patent
Estimating the term…
Abstract
A self-compensating circuit for controlling pixels in a display includes a plurality of light-emitter circuits. Each light-emitter circuit includes a light emitter, a drive transistor, and a compensation circuit. The compensation circuit is connected to the light emitter of one or more different light-emitter circuits.
Claims45
A self-compensating circuit for controlling pixels in a display, comprising:
- a plurality of light-emitter circuits, each light-emitter circuit comprising:
- a light emitter having a power connection to a power supply and an emitter connection;
- a drive transistor having a gate connected to a drive signal, a drain connected to the emitter connection, and a source connected to a ground;
- and
- a compensation circuit comprising one or more compensation diodes, each compensation diode connected to the emitter connection and connected to an other emitter connection of one or more light-emitter circuits other than the light-emitter circuit of which the compensation diode is a part, thereby emitting compensatory light from the one or more light-emitter circuits when the light emitter is faulty.
The self-compensating circuit of any one of the preceding claims, wherein the size of the compensation diodes in a light-emitter circuit is inversely related to the number of compensation diodes in the light-emitter circuit.
The self-compensating circuit of any one of the preceding claims, wherein the number of compensation diodes in each light-emitter circuit is one fewer than the number of light emitters in the self-compensating circuit.
The self-compensating circuit of any one of the preceding claims, wherein the light emitter is a light-emitting diode with a width from 2 to 5 μm, 5 to 10 μm, 10 to 20 μm, or 20 to 50 μm.
The self-compensating circuit of any one of the preceding claims, wherein the light emitter is a light-emitting diode with a length from 2 to 5 μm, 5 to 10 μm, 10 to 20 μm, or 20 to 50 μm.
The self-compensating circuit of any one of the preceding claims, wherein the light emitter is a light-emitting diode with a height from 2 to 5 μm, 4 to 10 μm, 10 to 20 μm, or 20 to 50 μm.
The self-compensating display of any one of claims 10 to 20, wherein the light emitters are arranged in groups of adjacent light emitters and wherein each compensation diode in each light-emitter circuit is connected to a different one of the emitter connections in the light-emitter circuits of each light emitter in the group.
A self-compensating circuit for controlling pixels in a display, comprising:
- a plurality of light-emitter circuits, each light-emitter circuit comprising:
- a light emitter having a power connection to a power supply and an emitter connection;
- a drive transistor having a gate connected to a drive signal, a drain connected to the emitter connection, and a source connected to a ground;
- and
- one or more compensation diodes, each compensation diode connected to the emitter connection of the light-emitter circuit of which the one or more compensation diodes are a part;
- wherein the number of compensation diodes in each light-emitter circuit is one fewer than the number of light emitters in the self-compensating circuit and each compensation diode in each light-emitter circuit is connected to an other emitter connection of each of one or more light-emitter circuits other than the light-emitter circuit of which the compensation diode is a part, thereby emitting compensatory light from the one or more light-emitter circuits when the light emitter is faulty.
A self-compensating circuit for controlling pixels in a display, comprising:
- a plurality of light-emitter circuits, each light-emitter circuit comprising:
- a light emitter having a power connection to a power supply and an emitter connection;
- a drive transistor having a gate connected to a drive signal, a drain connected to the emitter connection, and a source connected to a ground;
- a compensation diode connected to the emitter connection and connected to a common compensation connection;
- and
- a transfer diode connected to the emitter connection and connected to the common compensation connection with a polarity that is the reverse of the compensation diode polarity,
- wherein the common compensation connection of each of the plurality of light-emitter circuits is electrically connected in common.
Dependencies are inferred from the claim text.