Liquid crystal display device, television receiver, and display method for liquid crystal display device

摘要

A liquid crystal display device includes a liquid crystal panel having a plurality of pixels grouped into four types of type 1, type 2, type 3, and type 4; a panel driver circuit connected to the liquid crystal panel to drive the liquid crystal panel; and a display control circuit connected to the panel driver circuit, wherein said display control circuit divides each refresh cycle of the image signal into consecutive first to fourth terms and causes the panel driver circuit to drive the liquid crystal panel to perform a halftone display by changing pixel luminance during each refresh cycle composed of the first to fourth terms, and wherein said display control circuit provides timing signals and gradation data to the panel driver circuit so that, for a given halftone to be displayed in a refresh cycle, pixels belonging to respective types in the liquid crystal panel are driven such that the halftone is generated as averaged over the first to fourth terms.

主权项

1. A liquid crystal display device, comprising:
a liquid crystal panel having a plurality of pixels arranged in a matrix, said plurality of pixels being grouped into four types of type 1, type 2, type 3, and type 4; a panel driver circuit connected to the liquid crystal panel to drive the liquid crystal panel; and a display control circuit connected to the panel driver circuit, said display control circuit receiving an image signal, wherein said display control circuit divides each refresh cycle of the image signal into consecutive first to fourth terms and causes the panel driver circuit to drive the liquid crystal panel to perform a halftone display by changing pixel luminance during each refresh cycle composed of the first to fourth terms, and wherein said display control circuit provides timing signals and gradation data to the panel driver circuit so that, for a given halftone to be displayed in a refresh cycle, pixels belonging to respective types in the liquid crystal panel are driven such that: on pixels in type 1, an effective voltage that is at least as high as a first voltage is applied during the first and second terms, while an effective voltage that is lower than the first voltage is applied during the third and fourth terms, thereby generating the halftone as averaged over the first to fourth terms; on pixels in type 2, an effective voltage that is lower than a second voltage is applied during the first and second terms, while an effective voltage that is at least as high as the second voltage is applied during the third and fourth terms, thereby generating the halftone as averaged over the first to fourth terms; on pixels in type 3, an effective voltage that is lower than a third voltage is applied during the second and third terms, while an effective voltage that is at least as high as the third voltage is applied at least during the first term or the fourth term, thereby generating the halftone as averaged over the first to fourth terms; and on pixels in type 4, an effective voltage of at least as high as a fourth voltage is applied during each of the second and third terms, while an effective voltage lower than the fourth voltage is applied at least during the first term or the fourth term, thereby generating the halftone as averaged over the first to fourth terms.