Display apparatus and control method thereof

摘要

A display apparatus according to the present invention includes: a backlight; a displaying unit configured to display an image on a screen by allowing the light from the backlight to be transmitted therethrough; a first measuring unit provided on a light-emitting surface of the backlight, to detect the brightness on the light-emitting surface; a correcting unit configured to correct the detection brightness which is the brightness detected by the first measuring unit; and a controlling unit configured to control the light emission brightness of the backlight. The correcting unit reduces the detection brightness by a greater reduction amount, when the image displayed in a predetermined area corresponding to a position where the first measuring unit is provided is dark, than when the image displayed in the predetermined area is bright.

主权项

1. A display apparatus comprising:
a light emitting unit configured to emit light; a displaying unit configured to display an image on a screen by allowing the light from the light emitting unit to be transmitted therethrough at a transmittance based on an image signal, wherein the displaying unit comprises:
a user-facing surface that includes the screen from which the transmitted light is transmitted to a user; anda light-emitting-unit-facing surface facing the light emitting unit and differing from the user-facing surface,wherein light from the light emitting unit is incident on the light-emitting-unit-facing surface, andwherein a percentage of the incident light, which is emitted from the light emitting unit and is incident on the light-emitting-unit-facing surface, is transmitted to the user through the light-emitting-unit-facing surface and through the user-facing surface, and a percentage of the incident light is diffused by the displaying unit and then returned to radiate from the light-emitting-unit-facing surface, a first measuring unit provided on a light-emitting surface of the light emitting unit, that detects a detection brightness comprising the brightness of light received directly from the light-emitting surface and the brightness of the return light; a correcting unit configured to correct the detection brightness which is the brightness detected by the first measuring unit, based on the brightness of the image displayed in a predetermined area corresponding to a position where the first measuring unit is provided; and a control unit configured to control the light emission brightness of the light emitting unit so that the detection brightness after correction by the correcting unit coincides with a predetermined target value, wherein the correcting unit reduces, so that a change in the detection brightness due to return light which is returned to radiate from the light-emitting-unit-facing surface is corrected, the detection brightness by a greater reduction amount, in a case where the image displayed in the predetermined area is dark, than a case where the image displayed in the predetermined area is bright, which is brighter than the dark image displayed in the predetermined area.