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US 9,286,824 B2Granted
Display apparatus and control method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsHyun-jeong Ryu, Hong-ju Na
Life of this patent
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Abstract
A display apparatus includes a display unit which includes a plurality of pixels having an organic light emitting diode (OLED), a power supply which supplies power to the display unit, an image processor which processes an input image to display an image on the display unit, and a controller which determines whether an average picture level (APL) of the input image is a predetermined value or more. Based on the APL value, the controller controls the image processor to compensate for a gray scale of the input image to thereby increase a brightness of the input image, and controls the power supply to reduce the power supply corresponding to the brightness increased as a result of the compensated gray scale.
Claims19
A display apparatus comprising:
- a display unit which comprises a plurality of pixels having an organic light emitting diode (OLED);
- a power supply to supply power to the display unit;
- an image processor to process an input image to display an image on the display unit;
- and
- a controller to determine whether an average picture level (APL) of the input image is greater than or equal to a predetermined value, wherein
- if the APL of the input image is greater than or equal to the predetermined value, the controller controls the image processor to compensate for a gray scale of the input image to thereby increase a brightness of the input image, and controls the power supply to reduce power supply corresponding to the brightness increased as a result of the compensated gray scale, and
- if the APL of the input image is less than the predetermined value, the controller controls the image processor to maintain the gray scale of the input image so that the brightness of the input image is unchanged.
4 more elements
A display apparatus comprising:
- a display unit which comprises a plurality of pixels having an organic light emitting diode (OLED);
- a power supply to supply power to the display unit;
- an image processor to process an input image to display an image on the display unit;
- a controller to determine whether an average picture level (APL) of the input image is greater than or equal to a predetermined value, to selectively control the image processor to compensate for a gray scale of the input image to thereby increase a brightness of the input image, and to control the power supply to reduce power supply corresponding to the brightness increased as a result of the compensated gray scale;
- and
- a hardware storage to store a compensation coefficient for compensating for the gray scale of the input image and to store a duty value corresponding to the compensation coefficient, using a lookup table,
- wherein the compensation coefficient is calculated so that a maximum gray scale of the input image corresponds to a preset predetermined gray scale value.
4 more elements
A control method of a display apparatus comprising:
- determining whether an average picture level (APL) of an input image is greater than or equal to a predetermined value;
- if the APL of the input image is greater than or equal to the predetermined value, compensating for a gray scale of the input image to increase a brightness of the input image and reducing power supply corresponding to the brightness increased as a result of the compensated gray scale;
- and
- if the APL of the input image is less than the predetermined value, maintaining the gray scale of the input image so that the brightness of the input image is unchanged.
1 more element
A control method of a display apparatus comprising:
- determining whether an average picture level (APL) of an input image is greater than or equal to a predetermined value;
- compensating for a gray scale of the input image to increase a brightness of the input image;
- and
- reducing power supply corresponding to the brightness increased as a result of the compensated gray scale, wherein
- the compensating for the gray scale of the input image comprises referring to a compensation coefficient for compensating for the gray scale of the input image that is stored in advance in a lookup table stored in a hardware storage, and
- the compensation coefficient is calculated so that a maximum gray scale of the input image corresponds to a preset predetermined gray scale value.
3 more elements
A display apparatus comprising:
- an organic light emitting diode (OLED) display including a plurality of pixels;
- and
- a controller to control an image processor to adjust a gray scale value of an input image based upon an average value of a brightness level of an input image signal displayed by each of the plurality of pixels, wherein
- if the average value of the brightness level of the input image is greater than or equal to a predetermined value, the controller controls the image processor to compensate for the gray scale of the input image to thereby increase the brightness level of the input image, and
- if the average value of the brightness level of the input image is less than the predetermined value, the controller controls the image processor to maintain the gray scale of the input image so that the brightness of the input image is unchanged.
2 more elements
Dependencies are inferred from the claim text.