Display device and method for selecting gamma power
AssigneeLG Display Co., Ltd.
InventorMincheul Kim
Life of this patent
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Abstract
Disclosed are a display apparatus and a method for selecting a gamma power in which when selecting a gamma set corresponding to each luminance in an organic light emitting (OLED) display apparatus, a low power voltage and an initial voltage corresponding thereto are selected, and are provided to a display panel, thereby optimizing a black voltage and a driving voltage. To this end, the display apparatus includes a data driver which sets the low voltage and the initialization voltage corresponding to each gamma set and stores the same into a lookup table. Therefore, the low power voltage and the initialization voltage are changed only by selecting the gamma set. The display apparatus is suitable for operating at a black voltage and a low gray voltage.
Claims11
A display apparatus, comprising:
- a display panel having a plurality of gate lines and a plurality of data lines intersecting each other, and having a plurality of pixels, wherein each pixel is disposed at each of intersections between the plurality of gate lines and the plurality of data lines, wherein each pixel includes an organic light-emitting diode;
- a scan driver configured to apply a scan signal to the plurality of gate lines;
- a data driver configured to apply a data signal to the plurality of data lines;
- a light-emission controller configured to apply a light-emission control signal to the plurality of pixels;
- a power part configured to supply a high power voltage, a low power voltage, and an initialization voltage to the pixels;
- a timing controller configured to control the scan driver, the data driver, the light-emission controller, and the power part;
- and
- a luminance controller configured to:
- provide one gamma set among a plurality of gamma sets to the data driver, wherein each gamma set includes a plurality of gamma data;
- and
- provide dimming data corresponding to the selected gamma set to the light-emission controller,
- wherein upon receiving the selected one gamma set from the luminance controller, the data driver provides a low power voltage data and an initialization voltage data in correspondence with the selected one gamma set to the power part, and
- the power part provides a low power voltage ELVSS and an initialization voltage Vini2 corresponding to the low power voltage data and the initialization voltage data provided from the data driver to the plurality of pixels.
A method for selecting a gamma power of a display apparatus, the method comprising:
- (a) receiving, by a luminance controller, luminance data to be output to a display panel from an external system;
- (b) selecting, by a gamma set selector, a gamma set corresponding to the luminance data from among a plurality of gamma sets, each gamma set including a plurality of gamma data;
- (c) fetching, by the luminance controller, dimming data corresponding to the selected gamma set;
- (d) outputting, by the luminance controller, the selected gamma set to a data driver, and outputting, by the luminance controller, the dimming data to a light-emission controller;
- (e) obtaining, by the data driver, a low power voltage data and an initialization voltage data corresponding to the selected gamma set from a lookup table, and provides the obtained the low power voltage data and the initialization voltage data to the power part;
- and
- (f) providing, by the power part, a low power voltage ELVSS and an initialization voltage Vini2 corresponding to the obtained low power voltage data and initialization voltage data to the display panel.
Dependencies are inferred from the claim text.