Liquid crystal display device
View Patent ↗A liquid crystal display device which divides a pixel into a plurality of sub-pixels. In the liquid crystal display device, a gradation and a brightness in each of the sub-pixels have a non-linear relation to each other, and a desired brightness for the pixel is selected by selecting a gradation in each of the sub-pixels.
1. A liquid crystal display (LCD) device comprising:
a decoder receiving an N-bit input gradation signal, said decoder converting said N-bit input gradation signal into a plurality of M-bit gradation signals; and
a LCD having a plurality of pixels, said pixels having a plurality of sub-pixels, said LCD receiving said M-bit gradation signals,
wherein a gradation and a brightness in each of said sub-pixels have a non-linear relation to each other, and a desired brightness for said pixel is selected by selecting a gradation in each of said sub-pixels,
wherein N is greater than M, where N and M are positive integers,
said device further comprising a memory storing therein a relation between a gradation and a brightness in each of said sub-pixels,
wherein said relation in each of said sub-pixels is expressed as a table, and said memory stores said table therein, and said LCD displays said M-bit gradation signals without using Frame Rate Control (FRC).
2. The liquid crystal display (LCD) device as set forth in claim 1 , wherein a gamma (γ) for each of said sub-pixels is greater than a gamma (γ) for said pixel.
3. The liquid crystal display (LCD) device as set forth in claim 1 , wherein a drive voltage associated with input data is concurrently applied to said sub-pixels.
4. The liquid crystal display (LCD) device as set forth in claim 1 , wherein a sum of a maximum brightness in each of said sub-pixels is equal to a brightness associated with a maximum gradation of said pixel.
5. A liquid crystal display (LCD) device comprising:
a decoder receiving an N-bit input gradation signal, said decoder converting said N-bit input gradation signal into a plurality of M-bit gradation signals; and
a LCD having a plurality of pixels, said pixels having a plurality of sub-pixels, said LCD receiving said M-bit gradation signals,
wherein a gradation and a brightness in each of said sub-pixels have a non-linear relation to each other, and a desired brightness for said pixel is selected by selecting a gradation in each of said sub-pixels,
wherein N is greater than M, where N and M are positive integers,
said device further comprising a computing unit which computes said relation in each of said sub-pixels, and transmits the thus computed relation to a source driver, and
a computing device which computes a gradation associated with each of said sub-pixels in dependence on a gradation of input data,
wherein said LCD displays said M-bit gradation signals without using Frame Rate Control (FRC).
6. The liquid crystal display (LCD) device as set forth in claim 5 , wherein a gamma (γ) for each of said sub-pixels is greater than a gamma (γ) for said pixel.
7. The liquid crystal display (LCD) device as set forth in claim 5 , wherein a drive voltage associated with input aata is concurrently applied to said sub-pixels.
8. The liquid crystal display (LCD) device as set forth in claim 5 , wherein a sum of a maximum brightness in each of said sub-pixels is equal to a brightness associated with a maximum gradation of said pixel.
9. The liquid crystal display (LCD) device as set forth in claim 5 , wherein said computing unit computes said relation in each of said sub-pixels through the use of a specific algorithm.