Flat panel display and method of driving the same
View Patent ↗A flat panel display, which can save manufacturing costs and allow various types of dither masks to be applied, and a driving method thereof are disclosed. The flat panel display includes a look-up table (LUT) storing one dither mask, which is used to algorithmically generate additional dither masks. The dither masks are applied to image data to improve image quality.
1. A flat panel display, comprising:
a look-up table (LUT) storing a dither mask;
a dithering unit configured to produce a plurality of dither masks based on the dither mask stored in the LUT, and to apply different ones of the dither masks to image data during each successive frame period to generate dithered data, wherein the number of perceived gray levels of the dithered data is greater than the number of perceived gray levels of the image data; and
a sub-frame mapping unit configured to map the dithered data to a plurality of sub-frame data patterns included in one frame and to output the mapped data,
wherein the dithering unit comprises:
a calculator configured to produce dither masks; and
a dither unit configured to generate the dithered data,
wherein the calculator produced the dither masks by subtracting a number from all numbers including in the stored dither masks.
2. The flat panel display as claimed in claim 1 , further comprising:
a data driving unit configured to receive the mapped data, to generate data signals using the mapped data, and to supply generated data signals to data lines of the display;
a scan driving unit configured to supply scan signals to scan lines; and
a plurality of pixels respectively disposed near intersection points of the data lines and the scan lines, and to emit light or to not emitting light during every sub-frame period according to the data signals.
3. The flat panel display as claimed in claim 1 , wherein the number is produced by adding 1 to the value obtained by multiplying the quantity of rows and the quantity of columns of the stored dither mask.
4. A flat panel display, comprising:
a look up table (LUT) storing a dither mask;
a dithering unit configured to produce a plurality of dither masks based on the dither mask stored in the LUT, and to apply different ones of the dither masks to image data during each successive frame period to generate dithered data, wherein the number of perceived gray levels of the image data; and
a sub-frame mapping in unit configured to map the dithered data to a plurality of sub-frame data patterns included in one frame and to output the mapped data,
wherein the dithering unit comprises:
a calculator configured to produce the dither masks, and
a dither unit configured to generate the dithered data,
wherein the calculator produces the dither masks by exchanging numbers symmetrically about a lateral center axis or longitudinal center axis of the stored dither mask.
5. A method of driving a flat panel display, the method comprising:
producing a plurality of dither masks based on a stored dither mask;
dithering data using different dither masks during each of a plurality of frame periods;
mapping the dithered data to a plurality of sub-frame patterns included in one frame;
generating data signals using the mapped data; and
driving the flat panel display with the data signals,
wherein the producing the dither masks is performed by subtracting a number from all numbers in the stored dither mask.
6. The method as claimed in claim 5 , wherein producing the dither masks comprises performing an algorithmic operation on the stored dither mask.
7. The method as claimed in claim 5 , wherein the number is produced by adding 1 to a value obtained by multiplying the quantity of rows and the quantity of columns of the stored dither mask.
8. A flat panel display, comprising:
a look up table (LUT) storing a dither mask;
a dithering unit configured to produce a plurality of dither masks based on the dither mask stored in the LUT, and to apply different ones of the dither masks to image data during each successive frame period to generate dithered data, wherein the number of perceived gray levels of the image data is greater than the number of perceived gray levels of the image data; and
a sub-frame mapping unit configured to map the dithered data to a plurality of sub-frame data patterns included in one frame and to output the mapped data,
wherein the dithering unit comprises:
a calculator configured to produce the dither masks;
a dither unit configured to generate the dithered data, and
wherein the producing the dither masks is performed by exchanging numbers symmetric about a lateral center axis or longitudinal center axis of the stored dither mask.