Display device and driving method and terminal device thereof
View Patent ↗A display method can be flexibly applied to suppress the power consumption and a device and display method which can reduce the power consumption while the image quality is prevented from being deteriorated are provided. A display device which can be operated in a progressive mode and interlace mode includes a display portion having a plurality of pixels arranged thereon and a gradation correction table which stores data used to correct a difference between a gradation level when the display portion is driven in the progressive mode and a gradation level when it is driven in the interlace mode. Then, when video data supplied to the display portion is set in the interlace mode, a timing controller corrects the video data by use of data in the gradation correction table.
1. A display device comprising:
a display portion having a plurality of pixels arranged in a two-dimensional form, a plurality of scanning lines arranged along the plurality of pixels for respective rows and a plurality of signal lines arranged along the plurality of pixels for respective columns,
a scanning line drive circuit which drives the plurality of scanning lines,
a signal line drive circuit which supplies video signals to the plurality of pixels via the plurality of signal lines,
a timing controller which controls the scanning line drive circuit and signal line drive circuit to drive the display portion in a progressive mode or interlace mode, and
a gradation correction table which outputs correction data to correct a difference in a gradation level when the display portion is driven in the progressive mode in a case where the display portion is driven in the interlace mode,
wherein the gradation correction table is used to calculate the differences between luminance values at an interlace mode driving time for a selected gradation and a plurality of gradations before and after the selected gradation and a luminance value at a progressive mode driving time for each gradation used as a reference and to set a progressive gradation corresponding to a gradation which makes an absolute value of the difference minimum as an approximated gradation at the interlace mode driving time.
2. The display device according to claim 1 , wherein the gradation correction table is provided in the timing controller.
3. The display device according to claim 1 , wherein the gradation correction table is provided outside the timing controller.
4. A terminal device comprising:
a display portion having a plurality of pixels arranged in a two-dimensional form, a plurality of scanning lines arranged along the plurality of pixels for respective rows and a plurality of signal lines arranged along the plurality of pixels for respective columns,
a scanning line drive circuit which drives the plurality of scanning lines,
a signal line drive circuit which supplies video signals to the plurality of pixels via the plurality of signal lines,
a timing controller which controls the scanning line drive circuit and signal line drive circuit to supply image data to the display portion and drive the display portion in a progressive mode or interlace mode, and
a gradation correction table which is provided in a main device which supplies image data to the timing controller and outputs correction data to correct a difference in a gradation level when the display portion is driven in the progressive mode in a case where the display portion is driven in the interlace mode,
wherein the gradation correction table is used to calculate differences between luminance values at an interlace mode driving time for a selected gradation and a plurality of gradations before and after the selected gradation and a luminance value at a progressive mode driving time for each gradation used as a reference and to set a progressive gradation corresponding to a gradation which makes an absolute value of the difference minimum as an approximated gradation at the interlace mode driving time.
5. In a driving method of a display device which includes a display portion having a plurality of pixels arranged in a two-dimensional form, a plurality of scanning lines arranged along the plurality of pixels for respective rows and a plurality of signal lines arranged along the plurality of pixels for respective columns, a scanning line drive circuit which drives the plurality of scanning lines and a signal line drive circuit which supplies video signals to the plurality of pixels via the plurality of signal lines and controls the scanning line drive circuit and signal line drive circuit by use of a timing controller to drive the display portion in a progressive mode or interlace mode, the driving method of the display device comprising:
determining whether the display portion is driven in the progressive mode or interlace mode, and
outputting correction data used to correct a difference in a gradation level when the display portion is driven in the progressive mode in a case where the display portion is driven in the interlace mode,
wherein the gradation correction table is used to calculate differences between luminance values at an interlace mode driving time for a selected gradation and a plurality of gradations before and after the selected gradation and a luminance value at a progressive mode driving time for each gradation used as a reference and to set a progressive gradation corresponding to a gradation which makes an absolute value of the difference minimum as an approximated gradation at the interlace mode driving time and an approximated gradation data of the gradation correction table is used at the interlace mode driving time.