Display device and method for reducing power consumption through backlight control of on and off light source regions

Patent metadata

Field	Value
Publication number	US-9892689-B2
Application number	US-201414502059-A
Country	US
Kind code	B2
Filing date	Sep 30, 2014
Priority date	Sep 30, 2013
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

There is provided a display device which includes a display panel, a backlight that has a plurality of light sources and applies light to the display panel, a human body detector configured to detect a human body located around the display panel, a human body information acquisition unit configured to acquire information on the human body, and a control that controls an operation of a user recognition unit when the human body is detected in a standby mode, performs user recognition based on the acquired human body information, controls an operation of the display panel such that notification information of the user is displayed in a portion of the display panel, and turns some light sources out of the plurality of light sources on. According to the invention, for the user who views the display device, the local dimming is performed on the backlight which provides content information desired by the user utilizing only a portion of the display device. Therefore, it is possible to increase dynamic contrast and reduce power consumption more than in global dimming. Accordingly, the user may enter a personalized mode of a TV, and content information is provided to the user in the standby mode.

First claim

What is claimed is:

1. A display device, comprising:
an input configured to receive a user command;
a display panel including a first display region and a second display region that is a region other than the first display region;
a backlight including a first light emitting region in which some light sources out of a plurality of light sources are located and which is a region corresponding to the first display region of the display panel and a second light emitting region in which a remainder of light sources of the plurality of light sources are located, and which is a region corresponding to the second display region of the display panel, and configured to apply light to the display panel;
a human body detector configured to detect a human body located around the display panel;
a human body information acquisition unit configured to acquire information on the human body; and
a control configured to:
control an operation of the human body information acquisition unit when the human body is detected in a standby mode;
perform user recognition based on the acquired human body information;
perform a first display mode such that content information of a recognized user is displayed in the first display region of the display panel when it is determined that the notification information of the recognized user is stored in a storage;
perform the first display mode such that recommended content is displayed in the first display region of the display panel when it is determined that the content information of the recognized user is not stored in the storage:
perform a second display mode when a reproducing command is input while the first display mode is performed; and
terminate the first display mode and perform recording of a content when a record command is input while the first display mode is performed;
wherein the first display mode turns on operations of the first light emitting region of the backlight and the first display region of the display panel; and turns off operations of the second light emitting region of the backlight and the second display region of the display panel;
the second display mode turns on operations of the first light emitting region of the backlight and the first display region of the display panel and turns on operations of the second light emitting region of the backlight and the second display region of the display panel so that the content is reproduced in an entire region of the display device; and
wherein the control is configured to adjust sizes of the first display region and sizes of the first light emitting region based on a number of recognized users and, a number of the content information when the first display mode is performed, and
wherein the control is configured to reduce power consumption of the display device through backlight control of ON and OFF light source regions.

2. The display device according to claim 1 ,
wherein the human body detector includes at least one from among an infrared sensor, a camera, and a microphone.

3. The display device according to claim 1 ,
wherein the storage is configured to store at least one piece of user recognition information and content information corresponding to the at least one piece of user recognition information,
wherein the control is configured to recognize the user by comparing the acquired human B body information with the user recognition information, identify whether content information of the recognized user is stored when the human body is determined as a human body of a previously registered user.

4. The display device according to claim 1 ,
wherein, when the content information of the user is displayed, the control controls a power supply for some light sources of the first light emitting region and inhibits power supplied to the light sources of the second light emitting region.

5. The display device according to claim 1 ,
wherein the content information of the user includes information of the content viewed at a predetermined viewing ratio or more by the user, and
wherein the control turns off the light sources, which was previously turned on, such that displaying of the content information is terminated when a predetermined time has elapsed from a time at which the content information is displayed.

6. The display device according to claim 5 , further comprising
a communicator configured to receive a user command input to an external remote controller.

7. The display device according to claim 5 ,
wherein the control recognizes a motion in the acquired human body information and recognizes a user command based on the recognized motion.

8. The display device according to claim 5 ,
wherein the control recognizes speech in the acquired human body information and recognizes a user command based on the recognized speech.

9. The display device according to claim 1 ,
wherein, when a number of recognized users is plural, the control identifies content information of the recognized users and controls displaying of the identified content information.

10. The display device according to claim 1 ,
wherein, when a number of recognized users is plural, the control determines a user having a highest priority among the plurality of users, identifies content information of a determined user, and controls displaying of the identified content information.

11. A display device, comprising:
an input configured to receive a user command;
a display panel including a first display region and a second display region that is a region other than the first display region;
a backlight including a first light emitting region in which some light sources out of a plurality of light sources are located and which is a region corresponding to the first display region of the display panel and a second light emitting region in which a remainder of light sources of the plurality of light sources are located and which is a region corresponding to the second display region of the display panel, and configured to apply light to the display panel;
a human body detector configured to detect a human body; and
a control configured to:
identify whether user content information is stored in content storage when it is determined that the human body is detected in a standby mode;
perform a first display mode such that the user content information is displayed in the first display region of the display panel when it is determined that the user content information is stored in the storage; perform the first display mode such that recommended content is displayed in the first display region of the display panel when it is determined that the user content information is not stored in the storage;
perform a second display mode when a reproducing command is input while the first display mode is performed; and
terminate the first display mode and perform recording when a record command is input while the first display mode is performed,
wherein the first display mode turns on operations of the first light emitting region of the backlight and the first display region of the display panel and turns off operations of the second light emitting region of the backlight and the second display region of the display panel so that the user content information is displayed in a portion of the display device,
the second display mode turns on operations of the first light emitting region of the backlight and the first display region of the display panel and turns on operations of the second light emitting region of the backlight and the second display region of the display panel so that a content is reproduced in an entire region of the display device, and
wherein the control is configured to adjust sizes of the

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kang Kun Sok
• Song Hak Sup
• Lee Sang Il
• Lee Joo Whan
• Hong Seong Seol
• Lee Soo Yong
• Choi Mi Jin

Classifications

• G09G2354/00

  Aspects of interface with display user · CPC title

• G06F3/011

  Arrangements for interaction with the human body, e.g. for user immersion in virtual reality (blind teaching G09B21/00) · CPC title

• G10L17/00

  Speaker identification or verification techniques · CPC title

• G09G3/3406 Primary

  Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336) · CPC title

• G10L15/00

  Speech recognition (G10L17/00 takes precedence) · CPC title