Brightness adjustment system and method, and mobile terminal

Patent metadata

Field	Value
Publication number	US-2016293140-A1
Application number	US-201514739891-A
Country	US
Kind code	A1
Filing date	Jun 15, 2015
Priority date	Mar 30, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

Discloses is a brightness adjustment system and method, and a mobile terminal. The brightness adjustment system is used for a display device, and comprises: a distance measurement module configured to measure a perpendicular viewing distance from user's eyes to a display surface of the display device; and a brightness adjustment module configured to adjust the brightness of the display device to desired brightness based on the measured perpendicular viewing distance. The brightness adjustment system renders the display device, such as mobile terminal, etc., to automatically adjust the brightness based on the perpendicular viewing distance between the user's eyes and the display surface of the display device, satisfying requirements for display brightness.

First claim

1 . A brightness adjustment system for a display device, comprising:
a distance measurement module configured to measure a perpendicular viewing distance from a user's eyes to a display surface of the display device; and a brightness adjustment module configured to adjust the brightness of the display device to desired brightness based on the measured perpendicular viewing distance.

2 . The brightness adjustment system according to claim 1 , wherein the distance measurement module comprises:
a first distance measurement unit configured to measure a first distance, which is a perpendicular distance between the display surface of the display device and a virtual plane, the virtual plane being parallel with the display surface and being intersected at a point with a first line where the user's vertical body is located, and a second line for connecting said point with the position of the first distance measurement unit being perpendicular to the display surface; a second distance measurement unit configured to measure a second distance, which is a perpendicular distance from the user's eyes to the virtual plane; and a first distance calculation unit configured to determine the perpendicular viewing distance by calculating the measured first distance and second distance.

3 . The brightness adjustment system according to claim 2 , wherein the first distance measurement unit comprises an image sensor or a photoelectric sensor.

4 . The brightness adjustment system according to claim 2 , wherein the first distance measurement unit is provided in a non-display area of the display device.

5 . The brightness adjustment system according to claim 3 , wherein the first distance measurement unit comprises a photoelectric sensor that comprises:
a light source configured to emit light to the user's body; and a light receiver configured to receive the light reflected from the user's body.

6 . The brightness adjustment system according to claim 2 , wherein the second distance measurement unit comprises:
a tilt sensor configured to measure a tilt angle of the display surface of the display device with respect to the user's body; and a second distance calculation unit configured to determine the second distance based on the measured tilt angle.

7 . The brightness adjustment system according to claim 6 , wherein the tilt sensor is provided in a center of the display surface of the display device, and the second distance calculation unit is further configured to determine the second distance based on the measured tilt angle and a distance between the first distance measurement unit and the tilt sensor.

8 . The brightness adjustment system according to claim 7 , wherein the second distance measurement unit is provided below the display device, and the first distance calculation unit determines the perpendicular viewing distance by calculating the sum of the measured first distance and second distance.

9 . The brightness adjustment system according to claim 6 , wherein the tilt sensor comprises a gyroscope.

10 . The brightness adjustment system according to claim 1 , further comprising an ambient brightness detection module configured to sense and measure ambient brightness;
the brightness adjustment module being further configured to adjust the brightness of the display device to the desired brightness based on the measured perpendicular viewing distance and ambient brightness.

11 . A brightness adjustment method using the brightness adjustment system according to claim 1 , comprising steps of:
measuring the perpendicular viewing distance from the user's eyes to the display surface of the display device; and adjusting the brightness of the display device to the desired brightness based on the measured perpendicular viewing distance.

12 . The brightness adjustment method according to claim 11 , wherein the brightness adjustment system comprises an ambient brightness detection module, and the brightness adjustment method further comprises steps of:
sensing and measuring ambient brightness; and adjusting the brightness of the display device to the desired brightness based on the measured perpendicular viewing distance and ambient brightness.

13 . A mobile terminal, comprising the brightness adjustment system according to claim 1 .

14 . The mobile terminal according to claim 13 , wherein the distance measurement module comprises:
a first distance measurement unit configured to measure a first distance, which is a perpendicular distance between the display surface of the display device and a virtual plane, the virtual plane being parallel with the display surface and being intersected at a point with a first line where the user's vertical body is located, and a second line for connecting said point with the position of the first distance measurement unit being perpendicular to the display surface; a second distance measurement unit configured to measure a second distance, which is a perpendicular distance from the user's eyes to the virtual plane; and a first distance calculation unit configured to determine the perpendicular viewing distance by calculating the measured first distance and second distance.

15 . The mobile terminal according to claim 14 , wherein the first distance measurement unit comprises an image sensor or a photoelectric sensor.

16 . The mobile terminal according to claim 15 , wherein the first distance measurement unit comprises a photoelectric sensor that comprises:
a light source configured to emit light to the user's body; and a light receiver configured to receive the light reflected from the user's body.

17 . The mobile terminal according to claim 15 , wherein the second distance measurement unit comprises:
a tilt sensor configured to measure a tilt angle of the display surface of the display device with respect to the user's body; and a second distance calculation unit configured to determine the second distance based on the measured tilt angle.

18 . The mobile terminal according to claim 17 , wherein the tilt sensor is provided at a center of the display surface of the display device, and the second distance calculation unit is further configured to determine the second distance based on the measured tilt angle and the distance between the first distance measurement unit and the tilt sensor.

19 . The mobile terminal according to claim 17 , wherein the tilt sensor is a gyroscope.

20 . The mobile terminal according to claim 13 , wherein, the brightness adjustment system further comprises an ambient brightness detection module configured to sense and measure ambient brightness; and
the brightness adjustment module is further configured to adjust the brightness of the display device to the desired brightness based on the measured perpendicular viewing distance and ambient brightness.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Xin

Classifications

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G5/00 Primary

  Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) · CPC title

• G06F3/013

  Eye tracking input arrangements (G06F3/015 takes precedence) · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G2370/22

  Detection of presence or absence of input display information or of connection or disconnection of a corresponding information source · CPC title