Patent ID: 8355032

Claim:
A display apparatus comprising: a display panel; and a display panel driver configured to drive signal lines of said display panel, wherein said display panel driver comprises: a color reducing circuit configured to generate a color reduction image data from an input image data by executing an error diffusion process by using an error value; and a driving section configured to drive each of a plurality of pixels of said display panel in response to the color reduction image data, wherein when the input image data is supplied as a first image data of a first image display format, said color reducing circuit generates a first color reduction image data from the input image data by executing the error diffusion process by using a first error value, and generates a second color reduction image data from the input image data by executing the error diffusion process by using a second error value different from the first error value, wherein said driving section drives a first pixel positioned on a horizontal line of said display panel in response to the first color reduction image data and drives a second pixel positioned on the horizontal line and adjacent to said first pixel in a horizontal direction in response to the second color reduction image data, wherein when the input image data is supplied as an image data which includes a second input image data corresponding to said first pixel and a third input image data corresponding to said second pixel and which has a second image display format different from the first image display format, said color reducing circuit generates a third color reduction image data from the second input image data by executing the error diffusion process by using the first error value and generates a fourth color reduction image data from the third input image data by executing the error diffusion process by using the first error value, and wherein said driving section drives said first pixel in response to the third color reduction image data and drives said second pixel in response to the fourth color reduction data.