Image driving device, electronic device including image driving device, and image driving method

Patent metadata

Field	Value
Publication number	US-9959589-B2
Application number	US-201414465139-A
Country	US
Kind code	B2
Filing date	Aug 21, 2014
Priority date	Oct 11, 2013
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

An image driving device includes a determining unit, and image processing unit, and a memory. The determining unit determines whether an input image is a moving image or a still image, and may be synchronized with an internal clock different from an external clock. The image processing unit may image-process at least one frame but less than all frames of the input image when the input image is determined to be a still image. The image processing unit may output the at least one image-processed frame as first image data, and the memory may store the first image data.

First claim

What is claimed is:

1. An image driving device, comprising:
an analyzer to output a value indicative of whether an input image is a moving image or a still image, the analyzer to be synchronized with an internal clock different from an external clock;
an image processor to receive the input image and perform image-processing for compensating image quality of the input image, the image processor to receive the value and to perform the image-processing on different numbers of frames based on whether the value indicates the input image is a still image or a moving image, wherein the image processor is to perform the image-processing for compensating image quality on at least one frame but less than all frames of the input image to generate a first image data if the value indicates the input image is a still image, and the image processor is to perform the image-processing for compensating image quality on all frames of the input image to generate a second image data, if the value indicates the input image is a moving image; and
a memory to store the first image data received from the image processor if the value indicates the input image is a still image.

2. The device as claimed in claim 1 , wherein the analyzer includes:
a first comparator to compare representative values of consecutive frames of the input image and to output a first comparative value based on the comparison performed by the first comparator; and
a second comparator to compare whether the consecutive frames of the input image are equal when the first comparative value indicates that the representative values of the consecutive frames are equal, and to output a second comparative value based on the comparison performed by the second comparator.

3. The device as claimed in claim 2 , wherein:
each of the representative values of the consecutive frames indicates at least one of a check sum, a data sum, a data histogram, or random address data of a corresponding one of the consecutive frames, or each of a plurality of lines of the consecutive frames.

4. The device as claimed in claim 2 , further comprising:
a first storage area to store a representative value of a previously input frame from among the consecutive frames of the input image.

5. The device as claimed in claim 2 , wherein:
when the consecutive frames of the input image are determined to be equal, the second comparator is to withhold comparing whether the consecutive frames of the input image are equal during a first period corresponding to a frame rate of the input image.

6. The device as claimed in claim 1 , further comprising:
a second storage to store a determination result of a previously input frame from among the consecutive frames of the input image.

7. The device as claimed in claim 1 , wherein the image processor is to image-process only a first frame of the input image and is to transmit the image-processed first frame to the memory, when the analyzer determines that the input image is a still image.

8. The device as claimed in claim 1 , wherein the image processor is to image-process at least one arbitrary frame of the input image only and is to transmit the at least one image-processed arbitrary frame to the memory, when the analyzer determines that the input image is a still image.

9. The device as claimed in claim 1 , wherein the image processor is to output the second image data to an external display device instead of the memory, if the value indicates the input image is a moving image.

10. The device as claimed in claim 1 , wherein the analyzer does not determine whether the input image is a moving image or a still image during a second period corresponding to a least frame unit set with respect to the moving image, when the analyzer determines that the input image is a moving image.

11. The device as claimed in claim 1 , further comprising:
an output to output one of the first image data stored in the memory or second image data based on a result of the determination by the analyzer, wherein the second image data is data not stored in the memory but directly output from the image processor as output data of the input image.

12. The device as claimed in claim 1 , wherein:
the memory is to perform a refresh operation corresponding to a frame rate of output data of the image driving device and is to repeatedly output the first image data, when the analyzer determines that the input image is a still image.

13. The device as claimed in claim 1 , wherein:
the memory has a size less than each frame of the input image, and
the image driving device includes:
an encoder to compress the first image data; and
a decoder to decode the first image data compressed and stored in the memory as output data of the input image.

14. The device of claim 1 , wherein the external clock and the input data are input based on control of an application processor of a mobile terminal in which the image driving device is included.

15. An image driving device, comprising:
an interface to receive an input image from outside the image driving device;
an analyzer to output a value indicative of whether an input image is a moving image or a still image;
an image processor to receive the input image and perform image-processing for compensating image quality of the input image, the image processor to receive the value and to perform the image-processing on a different number of frames based on whether the value indicates that the input image is a moving image or still image, wherein the image processor is to generate first image-processed frames by performing the image-processing for compensating image quality on at least one frame but less than all frames of the input image if the value indicates the input image is a still image, and the image processor is to generate second image processed frames by performing the image-processing for compensating image quality on all frames of the input image if the value indicates the input image is a moving image; and
a memory to store the first image-processed frames received from the image processor if the input image is a still image, wherein power consumption to output the input image as output data differs based on whether the input image is a moving image or still image.

16. An apparatus, comprising:
an analyzer to output a value indicative of whether input image data corresponds to a moving image or a still image; and
an image processor to receive the input image and perform processing for compensating image quality of the input image, the image processor to receive the value and to perform the processing for compensating image quality on a first number of frames of the input image data when the value indicates that the input image data corresponds to a still image and to perform the processing for compensating image quality on a second number of frames when the value indicates that the input image data corresponds to a moving image, wherein the first number of frames is different from the second number of frames, wherein the image processor is to output the processed first number of frames to a graphic memory if the value indicates that the input image data corresponds to a still image, and wherein the image processor outputs the processed second number of frames without storing the second number of frames in the graphic memory if the value indicates that the input image data corresponds to a moving image.

17. The apparatus as claimed in claim 16 , wherein the first number of frames is fewer than all frames of the input image data.

18. The apparatus as claimed in claim 16 , wherein

Assignees

• Samsung Electronics Co Ltd

Inventors

• Bae Jong-Kon
• Kang Won-Sik
• Kim Yang-Hyo
• Woo Jae-Hyuck

Classifications

• G09G2360/18

  Use of a frame buffer in a display terminal, inclusive of the display panel · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2320/103

  Detection of image changes, e.g. determination of an index representative of the image change · CPC title

• G09G5/006

  Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04) · CPC title

• G09G5/005

  Adapting incoming signals to the display format of the display terminal · CPC title