Dual-memory driving of an electronic display
AssigneeApple Inc.
InventorsBilin Wang, Tien-Chien Kuo, Kanghoon Jeon, Chun-Yao Huang
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Abstract
A display system may include a memory external to a pixel that stores a first digital data value, a memory internal to the pixel that stores a second digital data signal, where a combination of the first digital data signal and the second digital data signal may indicate a target gray level assigned to the pixel for a particular image frame. The pixel may be driven for a first duration of time according to the first digital data signal and for a second duration of time according to the second digital data signal.
Claims20
A device, comprising:
- a pixel disposed in a region of a display;
- a first memory disposed outside the region;
- a second memory disposed in the region and comprising a plurality of memory circuitry;
- processing circuitry configured to store, for a portion of image data corresponding to cause the pixel to emit light at a grey level, a first bit in the first memory and one or more bits in the second memory;
- and
- a switch disposed between the first memory and the second memory, wherein the switch is operable based on the first bit in the first memory, and wherein the pixel emits light based on the one or more bits in the second memory while the switch is on.
A method, comprising:
- receiving a portion of image data associated with an image frame to be presented, wherein a pixel respectively emits light based on the portion of image data;
- determining to perform an all-on light emission operation configured to cause the pixel to emit light based on a first bit associated with the portion of image data;
- generating a first control signal based on the determination to perform the all-on light emission operation, wherein the first control signal causes the pixel to emit light;
- determining to perform a modulated light emission operation after the all-on light emission operation;
- and
- generating a second control signal based on the determination to perform the modulated light emission operation, wherein the second control signal is configured to cause the pixel to emit light based on one or more bits associated with the portion of image data.
A tangible, non-transitory, computer-readable medium, comprising computer-readable instructions that, when executed by one or more processors of one or more computers, cause the one or more computers to:
- receive a portion of image data associated with an image frame to be presented via a pixel of an active area, wherein the portion of image data corresponds to a first bit and one or more bits;
- generate a first control signal based on the first bit that causes the pixel to perform an all-on light emission operation;
- and
- generate a second control signal based on the one or more bits that causes the pixel to perform a modulated light emission operation.
Dependencies are inferred from the claim text.