Refresh rate matching for displays

A graphics system comprising:

• a display controller configured to:
• provide image pixel values representative of pixels of each image frame of one or more image frames at a pixel clock rate corresponding to an implemented refresh rate nearest to and lower than a target refresh rate;
• and
• provide additional pixel values representative of a first number of additional pixels for each image frame of the one or more image frames at the pixel clock rate, wherein providing the additional pixel values along with the image pixel values at the pixel clock rate causes a graphics display that receives the image pixel values and the additional pixel values to display the pixels of each image frame on the graphics display at the target refresh rate.

A method for displaying image frames, the method comprising:

• fetching, by a display generation circuit, pixel values representative of an image frame to be displayed;
• processing, by the display generation circuit, the fetched pixel values;
• providing, by a display controller circuit, a total number of pixel values for the image frame at a first clock frequency corresponding to a first refresh rate;
• wherein the total number of pixel values comprises the processed pixel values and additional pixel values representative of a specified number of additional pixels, wherein the additional pixels are not part of the image frame to be displayed;
• wherein providing the total number of pixel values at the first clock frequency causes a graphics display that receives the total number of pixel values to display the image frame on the graphics display at a second refresh rate higher than the first refresh rate, wherein the second refresh rate is a target display refresh rate.

A graphics system comprising:

• a processing element configured to determine, based at least on a first refresh rate and a second refresh rate higher than the first refresh rate, a number of respective blank pixels for each image frame of a plurality of image frames;
• and
• circuitry configured to provide at a first pixel clock rate, for each image frame, additional pixel values representative of the number of respective blank pixels and image pixel values representative of respective pixels representative of the image frame, wherein the first pixel clock rate corresponds to the first refresh rate;
• and
• wherein providing, at the first pixel clock rate, the number of additional pixel values along with the image pixel values causes a graphics display that receives the number of additional pixel values and the image pixel values to display the respective pixels representative of the image frame on the graphics display at the second refresh rate.