Device and method for image enlargement and display panel driver using the same

A display device, comprising:

• a display panel;
• and
• a display panel driver configured to drive the display panel in response to input image data corresponding to an input image,
• wherein the display panel driver includes:
• a scaler circuit configured to perform image enlargement processing on the input image data to generate α-times enlarged image data corresponding to an α-times enlarged image obtained by enlarging the input image with an enlargement factor of α (α is a number larger than one which cannot be represented as 2k for k being any natural number);
• and
• a driver section configured to drive a display panel in response to the α-times enlarged image data, and
• wherein, in calculating a pixel value of a first target pixel of the α-times enlarged image, the scaler circuit generates enlarged image data including 2n-times enlarged image data corresponding to a 2n-times enlarged image obtained by enlarging the input image with an enlargement factor of 2n (n is the smallest integer determined so that 2n is larger than α), and calculates the pixel value of the first target pixel from the 2n-times enlarged image data through interpolation processing of pixel values of selected pixels of the 2n-times enlarged image, the selected pixels of the 2n-times enlarged image corresponding to the first target pixel of the α-times enlarged image.

An image processing device, comprising:

• a scaler circuit configured to perform image enlargement processing on input image data corresponding to an input image to generate α-times enlarged image data corresponding to an α-times enlarged image obtained by enlarging the input image with an enlargement factor of α (α is a number larger than one which cannot be represented as 2k for k being any natural number),
• wherein the scaler circuit includes:
• a 2n-times enlarged image generator circuit configured to generate enlarged image data including 2n-times enlarged image data corresponding to a 2n-times enlarged image obtained by enlarging the input image with an enlargement factor of 2n (n is the smallest integer determined so that 2n is larger than α);
• and
• an α-times enlarged image generator circuit configured to generate the α-times enlarged image data from the 2n-times enlarged image data,
• wherein, in calculating a pixel value of a first target pixel of the α-times enlarged image, the α-times enlarged image generator circuit calculates the pixel value of the first target pixel from the 2n-times enlarged image data through interpolation processing of pixel values of selected pixels of the 2n-times enlarged image, the selected pixels of the 2n-times enlarged image corresponding to the first target pixel of the α-times enlarged image.

An image processing method for performing image enlargement processing on input image data corresponding to an input image to generate α-times enlarged image data corresponding to an α-times enlarged image obtained by enlarging the input image with an enlargement factor of α (α is a number larger than one which cannot be represented as 2k for k being any natural number), the method comprising:

• generating enlarged image data including 2n-times enlarged image data corresponding to a 2n-times enlarged image obtained by enlarging the input image with an enlargement factor of 2n (n is the smallest integer determined so that 2n is larger than α);
• and
• generating the α-times enlarged image data from the 2n-times enlarged image data,
• wherein, in calculating a pixel value of a first target pixel of the α-times enlarged image, the pixel value of the first target pixel is calculated from the 2n-times enlarged image data through interpolation processing of pixel values of selected pixels of the 2n-times enlarged image, the selected pixels of the 2n-times enlarged image corresponding to the first target pixel of the α-times enlarged image.