US 11,145,266 B2 · Method and circuit for viewing angle image compensation

Abstract

A method and a circuit for viewing-angle image compensation applied to a flat panel display are provided. A viewing-angle image compensation scheme is applied to an input image for improving a problem of color shift caused by a large viewing angle. The method further solves the blur effect in high frequency regions and color bleeding in low saturation regions of the input image after viewing-angle image compensation. In the method, a frequency distribution of the input image is detected and decremental frequency weights are assigned to the regions having high to low frequencies. A saturation distribution of the input image is detected and incremental saturation weights are assigned to the regions having high to low saturations. The weights assigned to the regions are used to designate degrees of the viewing-angle image compensation. The method can effectively reduce the effect of the viewing-angle image compensation on the image.

Claims18

Dependent claims

A method for viewing-angle image compensation, comprising:

detecting a frequency distribution of an input image having display regions, and assigning different frequency weights according to frequencies with respect to the display regions ranging from a high-frequency display region to a low-frequency display region;
detecting a saturation distribution of the input image, and assigning different saturation weights to the display regions ranging from a high-saturation display region to a low-saturation display region;
determining degrees for performing viewing-angle image compensation on each of the display regions of the input image according to the respective frequency weights assigned to the display regions and according to the respective saturation weights assigned to the display regions;
and
generating an output image after performing mixing-weight mapping on the image being processed with the viewing-angle image compensation.

2 more elements

A circuit for driving a display panel and performing viewing-angle image compensation, comprising:

at least one circuit logistic configured to perform the steps of:
detecting a frequency distribution of an input image having display regions, and assigning different frequency weights according to frequencies with respect to the display regions ranging from a high-frequency display region to a low-frequency display region;
detecting a saturation distribution of the input image, and assigning different saturation weights to the display regions ranging from a high-saturation display region to a low-saturation display region;
determining degrees for performing viewing-angle image compensation on each of the display regions of the input image according to the respective frequency weights assigned to the display regions and according to the respective saturation weights assigned to the display regions;
and
generating an output image after performing mixing-weight mapping on the image being processed with the viewing-angle image compensation.

3 more elements

Dependencies are inferred from the claim text.

Method and circuit for viewing angle image compensation

Life of this patent

Method and circuit for viewing angle image compensation

Life of this patent

Abstract

Claims18