FIELD

The disclosed technology generally relates to a display driver, display device and method for driving a display panel.

BACKGROUND

A display device may be configured to display a part of an image with a brightness level higher than that of the remaining part of the image. This configuration may be used to illuminate a user's finger placed on the display panel during an optical finger print recognition. In such implementations, the user may be asked to put the user's finger on a predetermined region of the display panel, and the display device may be configured to increase the brightness level of the predetermined region to illuminate the user's finger.

SUMMARY

This summary is provided to introduce in a simplified form a selection of concepts that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to limit the scope of the claimed subject matter.

In one or more embodiments, a display driver is provided. The display driver includes control circuitry and image processing circuitry. The control circuitry is configured to store a default gamma curve and determine a scale factor based on a location of a target pixel in a display panel. The control circuitry is further configured to determine a modified gamma curve by scaling the default gamma curve with the scale factor. The image processing circuitry configured to apply a gamma transformation based on the modified gamma curve to image data defined for the target pixel to generate output voltage data for the target pixel.

In one or more embodiments, a display device is provided. The display device includes a display panel and a display driver. The display driver includes control circuitry, image processing circuitry, and data driver circuitry. The control circuitry is configured to store a default gamma curve and determine a scale factor based on a location of a target pixel in the display panel. The control circuitry is further configured to determine a modified gamma curve by scaling the default gamma curve with the scale factor. The image processing circuitry configured to apply a gamma transformation based on the modified gamma curve to image data defined for the target pixel to generate output voltage data. The data driver circuitry is configured to update the target pixel based on the output voltage data.

In one or more embodiments, a method for driving a display panel is provided. The method includes determining a scale factor based on a location of a target pixel in a display panel and determining a modified gamma curve by scaling a default gamma curve with the scale factor. The method further includes applying a gamma transformation based on the modified gamma curve to image data defined for the target pixel to generate output voltage data and updating the target pixel based on the output voltage data.

Other aspects of the embodiments will be apparent from the following description and the appended claims.

