US 11,852,851 B2
Optical compensation strip, display panel, display device and driving method
Jianting Wang, Beijing (CN); Zhanchang Bu, Beijing (CN); Rui Guo, Beijing (CN); Zhiming Meng, Beijing (CN); Junning Su, Beijing (CN); and Jianzi He, Beijing (CN)
Assigned to BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Nov. 27, 2019, as Appl. No. 16/697,487.
Claims priority of application No. 201910124041.4 (CN), filed on Feb. 19, 2019.
Prior Publication US 2020/0264346 A1, Aug. 20, 2020
Int. Cl. G02B 5/04 (2006.01); G09G 3/34 (2006.01); H05K 5/00 (2006.01); H05K 5/03 (2006.01)
CPC G02B 5/045 (2013.01) [G09G 3/3406 (2013.01); H05K 5/0017 (2013.01); H05K 5/0021 (2013.01); H05K 5/03 (2013.01); G09G 2300/026 (2013.01); G09G 2340/045 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A driving method of a backlight module, wherein a display device comprises at least two sub-display panels, at least one optical compensation strip, and at least two backlight modules in a one-to-one correspondence with the at least two sub-display panels; wherein
each of the at least one optical compensation strip is located on a light emitting surface of two adjacent sub-display panels and covers a seam between the two adjacent sub-display panels; and each of the at least two backlight modules is located at a light incident surface of the sub-display panel corresponding thereto; and
each of the at least one optical compensation strip includes: a display cover plate, and at least two prisms disposed opposite to the display cover plate, the display cover plate being fixed on the light emitting surface of the adjacent two sub-display panels, and the at least two prisms being located between the display cover plate and the light emitting surface; wherein
a gap is present between each of the prisms and the display cover plate, and each of the prisms, the display cover plate, and the seam all extend along a first direction; and
the at least two prisms are configured to refract light emitted from the two adjacent sub-display panels to an area of the display cover plate corresponding to the seam; and
wherein the driving method is for driving one of the at least two backlight modules of the display device, the backlight module being disposed on a light incident surface of a target sub-display panel, the backlight module being direct type backlight modules, and the backlight modules comprising a plurality of light-emitting units;
wherein the method comprises:
determining a luminance compensation coefficient according to a first length of a path-transformation display area, and a sum of a first length of the path-transformation display area and a second length of a compensation display area, in the display area of the target sub-display panel, the luminance compensation coefficient being greater than one, and the luminance compensation coefficient being negatively correlated with the first length and positively correlated with the sum of the lengths; and
compensating for a driving signal of a target light-emitting unit of the plurality of light-emitting units according to the luminance compensation coefficient, an orthographic projection of the target light-emitting unit at the target sub-display panel being located within the path-transformation display area;
wherein the path-transformation display area is an area of the display area covered by orthographic projections of at least two prisms of the target optical compensation strip and the path-transformation display area extends along a first direction, the compensation display area is an area of the target optical compensation strip covering the seam, and the compensation display area extends along the first direction, the first length is a length of the path-transformation display area in a second direction, the second length is a length of the compensation display area in the second direction, the target optical compensation strip is disposed on a light emitting surface of the target sub-display panel and extends along the first direction, the second direction is perpendicular to the first direction, and the first direction and the second direction are both parallel to the light emitting surface.