Display apparatus and control method thereof

Patent metadata

Field	Value
Publication number	US-2016293139-A1
Application number	US-201615085249-A
Country	US
Kind code	A1
Filing date	Mar 30, 2016
Priority date	Mar 30, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A display apparatus including: a display configured to display an image; and at least one processor configured to, in response to beginning a viewer fatigue reduction function, determine whether a change characteristic of an image displayed on the display during a first time interval of an image signal corresponds to a suitable section for the viewer fatigue reduction function, and control the display to decrease a viewing fatigue level of the displayed image during the determined suitable section.

First claim

What is claimed is:

1 . A display apparatus comprising:
a display configured to display an image; a user input interface configured to receive a user input; and at least one processor configured to, in response to the user input, begin a viewer fatigue reduction function, determine whether a change characteristic of an image displayed on the display during a first time interval corresponds to a suitable time interval for the viewer fatigue reduction function, and control the display to decrease a viewing fatigue level of the displayed image during the determined suitable time interval.

2 . The display apparatus according to claim 1 , wherein the processor is further configured to decrease the viewing fatigue level by adjusting at least one attribute value of the displayed image during the suitable time interval, the viewing fatigue level comprising an emission amount of blue light and the attribute of the image comprising at least one among a contrast ratio, a color temperature, and brightness of the image.

3 . The display apparatus according to claim 2 , wherein the processor is further configured to determine a category of the displayed image, and determine a change range of a contrast ratio due to a decrease in the viewing fatigue level according to the determined category of the image.

4 . The display apparatus according to claim 3 , wherein the category of the image comprises a moving image and a still image, and a change range of a contrast ratio of the moving image is larger than a change range of a contrast ratio of the still image.

5 . The display apparatus according to claim 4 , wherein the processor is further configured to, in response to a change in the category of the displayed image, decrease the viewing fatigue level within a change range of a contrast ratio corresponding to the changed category.

6 . The display apparatus according to claim 2 , further comprising a memory configured to store a lookup table of setting values of color temperature and brightness of an image corresponding to an operation time of the reduction function,
wherein the processor is further configured to load the color temperature and the brightness corresponding to the operation time of the viewer fatigue reduction function from the lookup table during the suitable time interval, and control the display to apply the loaded color temperature and the brightness to the displayed image.

7 . The display apparatus according to claim 6 , wherein the memory is further configured to store a color temperature table in which a gain value of a red/green/blue (RGB) signal corresponding to the setting value of the color temperature is stored, and
the processor is further configured to load a gain value of the RGB signal corresponding to the loaded color temperature from the color temperature table and control the display to apply the color temperature corresponding to the operation time of the suitable time interval based on the loaded gain value of the RGB signal to the displayed image.

8 . The display apparatus according to claim 1 , wherein the change characteristic of the image comprises a change range of an average picture level in brightness of the image, and
the processor is further configured to detect the average picture level of the brightness of the image displayed in the first time interval and a change range of the average picture level, compare the change range of the detected average picture level with a threshold, and determine the first time interval as the suitable time interval according to a result of the comparison.

9 . The display apparatus according to claim 8 , wherein the change characteristic of the image comprises a regularity of a motion vector in the displayed image, and
the processor is further configured to detect information about a horizontal/vertical (H/V) motion vector of the displayed image during the first time interval, and determine the first time interval as the suitable time interval according to the regularity of the detected H/V motion vector.

10 . The display apparatus according to claim 1 , wherein the processor is further configured to, in response to beginning the viewer fatigue reduction function, perform an instant level decrease for immediately decreasing the viewing fatigue level of the displayed image by a first decrement, and perform a gradual level decrease for gradually decreasing the viewing fatigue level by a second decrement during a predetermined time interval, after the instant level decrease, and
the gradual level decrease is controlled to decrease the viewing fatigue level during the determined suitable time interval in accordance with the change characteristic of the image.

11 . The display apparatus according to claim 1 , wherein the processor is further configured to, in response to an attribute value of the displayed image reaching a target value or a preset operation time elapsing, terminate the viewer fatigue reduction function, and
the target value corresponds to a category of the displayed image.

12 . A method of controlling a display apparatus, the method comprising:
receiving a user input for beginning a viewer fatigue reduction function; detecting a change characteristic of an image displayed on a display during a first time interval of an image signal in response to beginning the viewer fatigue reduction function; determining whether the first time interval corresponds to a suitable time interval for a viewer fatigue reduction function based on the detected change characteristic; and controlling the displayed image to decrease a viewing fatigue level of the displayed image during the determined suitable time interval.

13 . The method according to claim 12 , wherein the controlling the image comprises decreasing the viewing fatigue level by adjusting at least one attribute value of the displayed image during the suitable time interval,
wherein the viewing fatigue level comprises an emission amount of blue light, and the attribute of the image comprises at least one among a contrast ratio, a color temperature and brightness of the image.

14 . The method according to claim 13 , further comprising determining a category of the displayed image, wherein a change range of a contrast ratio due to decrease in the viewing fatigue level is determined according to the determined category of the image.

15 . The method according to claim 14 , wherein the category of the image comprises a moving image and a still image, and a change range of a contrast ratio of the moving image is larger than a change range of a contrast ratio of the still image.

16 . The method according to claim 15 , further comprising detecting a change in the category of the displayed image, and
decreasing the viewing fatigue level within a change range of a contrast ratio corresponding to the changed category.

17 . The method according to claim 13 , further comprising storing a lookup table of setting values of color temperature and brightness of an image corresponding to an operation time of the viewer fatigue reduction function, and
wherein the controlling the image comprises loading the color temperature and the brightness corresponding to the operation time of the reduction function from the lookup table during the suitable time interval, and controlling the display to apply the loaded color temperature and brightness to the displayed image.

18 . The method according to claim 12 , wherein the change characteristic of the image comprises a change range of an average picture level in brightness of th

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kwon Oh-Yun

Classifications

• G09G2320/08

  Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal · CPC title

• G09G2320/066

  for control of contrast · CPC title

• G09G5/06

  using colour palettes, e.g. look-up tables · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G5/02 Primary

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title