Organic light-emitting diode display with dynamic power supply control

摘要

A display may receive image data to be displayed for a user of an electronic device. Display driver circuitry in the display may include a timing controller that receives the image data. The timing controller can analyze frames of the image data to determine average luminance values for the frames. The display may include an array of organic light-emitting diode display pixels. Each display pixel may include a light-emitting diode. A transistor in each display pixel may be coupled in series with the light-emitting diode between positive and ground power supply terminals. The timing controller can limit peak luminance in the image data that is displayed on the array of display pixels as a function of average luminance. The timing controller can also direct power regulator circuitry to adjust a power supply voltage applied to the positive power supply terminal based on the average luminance.

主权项

1. Display circuitry, comprising:
display driver circuitry that receives image data having average luminance values; an array of organic light-emitting diode display pixels, each light-emitting diode display pixel having a scan input terminal that receives a scan signal from the display driver circuitry, a data input that receives a data signal from the display driver circuitry, and a power supply voltage terminal that receives a power supply voltage; and power regulator circuitry that includes a register and that dynamically adjusts the power supply voltage, wherein the power supply voltage is adjusted by adjusting bits in the register based on the average luminance values, wherein the power supply voltage has a first maximum voltage level for a first average luminance value, and wherein the power supply voltage has a second maximum voltage level that is less than the first maximum voltage level for a second average luminance value that is greater than the first average luminance value.