BACKGROUND

The present disclosure relates to systems and methods for sensing characteristics of pixels in electronic display devices to compensate for non-uniformity in luminance or color of a pixel with respect to other pixels in the electronic display device.

This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present techniques, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art.

As electronic displays are employed in a variety of electronic devices, such as mobile phones, televisions, tablet computing devices, and the like, manufacturers of the electronic displays continuously seek ways to improve the consistency of colors depicted on the electronic display devices. For example, given variations in manufacturing, various noise sources present within a display device, or various ambient conditions in which each display device operates, different pixels within a display device might emit a different color value or gray level even when provided with the same electrical input. It is desirable, however, for the pixels to uniformly depict the same color or gray level when the pixels are programmed to do so to avoid visual display artifacts due to inconsistent color.

SUMMARY

A summary of certain embodiments disclosed herein is set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of these certain embodiments and that these aspects are not intended to limit the scope of this disclosure. Indeed, this disclosure may encompass a variety of aspects that may not be set forth below.

In certain electronic display devices, light-emitting diodes such as organic light-emitting diodes (OLEDs), micro-LEDs (μLEDs), or active matrix organic light-emitting diodes (AMOLEDs) may be employed as pixels to depict a range of gray levels for display. However, due to various properties associated with the operation of these pixels within the display device, a particular gray level output by one pixel in a display device may be different from a gray level output by another pixel in the same display device upon receiving the same electrical input. In some cases, the distribution of power or voltage across a power or voltage rail in a display may vary across the display. That is, as the border or bezel region of electronic display becomes smaller, the size of the power rail disposed in the electronic displays becomes smaller. As a result of using smaller more compact power rails, a current-resistance (IR) drop may be experienced by the pixel circuits powered by the power rails, thereby affecting the accuracy of the color and luminance depicted by the corresponding pixel.

With the foregoing in mind, the presently disclosed embodiments include employing a weighted average pixel level (APL) system that models the expected IR drop across an electronic display. Based on the expected IR drop at various pixels across the electronic display, a voltage adjustment system may adjust the pixel value or gray level value (e.g., digital value) of a respective pixel to compensate for the expected decrease in voltage at the pixel circuit due to the expected IR drop. In another embodiment, the voltage adjustment system may adjust or modify a gamma voltage (e.g., analog voltage) employed by pixel circuits to generate pixel voltages. In either case, the voltage adjustment system may enable the electronic display to present color values and luminance values in pixels across the electronic display in a consistent manner despite the IR drop along the power rail.

Various refinements of the features noted above may exist in relation to various aspects of the present disclosure. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present disclosure alone or in any combination. The brief summary presented above is intended only to familiarize the reader with certain aspects and contexts of embodiments of the present disclosure without limitation to the claimed subject matter.

