Transparent display apparatus and method for controlling the same
AssigneeLG Display Co., Ltd.
InventorsIlHo Kim, YoungHoon Noh, ByungChun Yu, Seongmin Choi
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Abstract
There are provided a transparent display apparatus and a method for controlling the same. The transparent display apparatus includes a transparent display unit that includes an emissive area and a transmissive area and is configured to display a video, an optical sensor configured to measure the amount of light, and a light shielding unit that is disposed on one surface of the transparent display unit and is configured to adjust transmittance on the basis of the amount of light.
Claims14
An apparatus comprising:
- a transparent display unit including an emissive area and a transmissive area;
- a light control unit to adjust a transmittance of the transmissive area;
- and
- a controller on an integrated circuit, electrically connected to the transparent display unit and the light control unit, the controller to control a contrast ratio of the emissive area and the transmissive area on a basis of a target contrast ratio and a brightness of ambient light
- wherein the target contrast ratio is controlled by the controller using an equation:
- target
-
-
- contrast
-
-
- ratio
- =
- X
-
- :
-
- 1
- =
- L
- max
- +
- L
- front
- ×
- T
- reflect
- +
- L
- back
- ×
- T
- self
- ×
- T
- var
- L
- min
- +
- L
- front
- ×
- T
- reflect
- +
- L
- back
- ×
- T
- self
- ×
- T
- var
-
- :
-
- 1
- wherein X:1 is the target contrast ratio of the apparatus, and
- wherein Lmax is a maximum luminance of the apparatus, Lmin is a minimum luminance of the apparatus, Lfront is a luminance of light incident onto a front surface of the apparatus, Lback is a luminance of light incident onto a rear surface of the apparatus, Treflect is a light reflectivity of the apparatus, Tself is a self-transmittance of the apparatus, and Tvar is a light transmittance of the light control unit.
A controller of a display apparatus to operate a transparent display unit and a light control unit, the controller to:
- receive at least two different ambient light values sensed from corresponding at least two different optical sensors of the transparent display unit,
- adjust a luminance of an emissive area of the transparent display unit, and
- adjust a transmittance of the light control unit corresponding to the transparent display unit on a basis of a target contrast ratio determined from the at least two different sensed ambient light values,
- wherein the target contrast ratio is determined using an equation:
- target
-
-
- contrast
-
-
- ratio
- =
- X
-
- :
-
- 1
- =
- L
- max
- +
- L
- front
- ×
- T
- reflect
- +
- L
- back
- ×
- T
- self
- ×
- T
- var
- L
- min
- +
- L
- front
- ×
- T
- reflect
- +
- L
- back
- ×
- T
- self
- ×
- T
- var
-
- :
-
- 1
- wherein X:
- 1 is the target contrast ratio of the transparent display unit, and
- wherein Lmax is a maximum luminance of the transparent display unit, Lmin is a minimum luminance of the transparent display unit, Lfront is a luminance of light incident onto a front surface of the transparent display unit, Lback is a luminance of light incident onto a rear surface of the transparent display unit, Treflect is a light reflectivity of the transparent display unit, Tself is a self-transmittance of the transparent display unit, and Tvar is a light transmittance of the transparent display unit.
Dependencies are inferred from the claim text.