Control method for display device and display device
A display device includes liquid crystal panels, and displays an image, based on emission light from each of the liquid crystal panels. A display control circuit of the display device supplies image data of respective colors R, G, and B to the corresponding liquid crystal panels. A panel pixel having the lowest transmittance of three panel pixels corresponding to white-side pixels at domain boundaries is regarded as a reference panel pixel. The display control circuit reduces a gray scale level of pixel data supplied to two panel pixels other than the reference panel pixel of the three panel pixels. With this, coloring of the white-side pixels can be suppressed.
1. A control method for a display device including a first liquid crystal panel, a second liquid crystal panel, and a third liquid crystal panel and being configured to display an image, based on emission light from the first liquid crystal panel, emission light from the second liquid crystal panel, and emission light from the third liquid crystal panel, the control method comprising:
supplying first color pixel data to the first liquid crystal panel, supplying second color pixel data being different from the first color pixel data to the second liquid crystal panel, and supplying third color pixel data being different from the first color pixel data and the second color pixel data to the third liquid crystal panel; and
reducing a gray scale level of pixel data supplied to panel pixels other than a reference panel pixel among a first panel pixel, a second panel pixel and a third panel pixel, the reference panel pixel being a panel pixel having the lowest transmittance among the first panel pixel of the first liquid crystal panel that corresponds to a first display pixel, the second panel pixel of the second liquid crystal panel that corresponds to the first display pixel, and the third panel pixel of the third liquid crystal panel that corresponds to the first display pixel, in the image.
2. The control method for a display device according to claim 1 , wherein
the display device includes an optical path shift element configured to shift a position of a display pixel for each unit period included within one frame, the display pixel being formed by emission light from each of the first liquid crystal panel, the second liquid crystal panel, and the third liquid crystal panel.
3. The control method for a display device according to claim 1 , comprising:
increasing a gray scale level of pixel data supplied to a panel pixel adjacent to the reference panel pixel, the panel pixel being a panel pixel of a fourth panel pixel of the first liquid crystal panel that corresponds to a second display pixel adjacent to the first display pixel in the image, a fifth panel pixel of the second liquid crystal panel that corresponds to the second display pixel, and a sixth panel pixel of the third liquid crystal panel that corresponds to the second display pixel.
4. The control method for a display device according to claim 3 , comprising:
increasing a gray scale level of pixel data supplied to the reference panel pixel.
5. The control method for a display device according to claim 4 , comprising:
reducing a gray scale level of pixel data supplied to panel pixels other than the panel pixel adjacent to the reference panel pixel among the fourth panel pixel, the fifth panel pixel, and the sixth panel pixel.
6. The control method for a display device according to claim 1 , wherein
a gray scale level of the first display pixel is higher than a gray scale level of the second display pixel.
7. A control method for a display device including a first liquid crystal panel, a second liquid crystal panel, and a third liquid crystal panel, being configured to display an image, based on emission light from the first liquid crystal panel, emission light from the second liquid crystal panel, and emission light from the third liquid crystal panel, and being provided with a correction look-up table that stores correction data corresponding to a difference between gray scale levels of two display pixels adjacent to each other in the image, the control method comprising:
acquiring correction data from the correction look-up table, based on pixel data indicating a gray scale level of each color of a first display pixel in the image and pixel data indicating a gray scale level of a second display pixel adjacent to the first display pixel;
reducing a gray scale level of pixel data, based on the correction data, the pixel data being supplied to panel pixels other than a reference panel pixel among a first panel pixel, a second panel pixel, and a third panel pixel, the reference panel pixel being a panel pixel having the lowest transmittance among the first panel pixel of the first liquid crystal panel that corresponds to the first display pixel, the second panel pixel of the second liquid crystal panel that corresponds to the first display pixel, and the third panel pixel of the third liquid crystal panel that corresponds to the first display pixel; and
supplying pixel data in which gray scale levels of two colors are corrected based on the correction data, for each color to the first liquid crystal panel, the second liquid crystal panel, and the third liquid crystal panel.
8. A display device, comprising:
a first liquid crystal panel;
a second liquid crystal panel;
a third liquid crystal panel;
a storage device configured to store a correction look-up table that stores correction data corresponding to a difference between gray scale levels of two display pixels adjacent to each other in an image displayed based on emission light from the first liquid crystal panel, emission light from the second liquid crystal panel, and emission light from the third liquid crystal panel; and
a control device, wherein
the control device executes processing of:
acquiring correction data from the correction look-up table, based on pixel data indicating a gray scale level of each color of a first display pixel in the image and pixel data indicating a gray scale level of a second display pixel adjacent to the first display pixel;
reducing a gray scale level of pixel data, based on the correction data, the pixel data being supplied to panel pixels other than a reference panel pixel among a first panel pixel, a second panel pixel, and a third panel pixel, the reference panel pixel being a panel pixel having the lowest transmittance among the first panel pixel of the first liquid crystal panel that corresponds to the first display pixel, the second panel pixel of the second liquid crystal panel that corresponds to the first display pixel, and the third panel pixel of the third liquid crystal panel that corresponds to the first display pixel; and
supplying pixel data in which gray scale levels of two colors are corrected based on the correction data, for each color to the first liquid crystal panel, the second liquid crystal panel, and the third liquid crystal panel.