US 10,890,790 B2
Repairing method for abnormal pixel spots of display panel and display device
Chung-Kuang Chien, Chongqing (CN)
Assigned to HKC CORPORATION LIMITED, Shenzhen (CN); and CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Chongqing (CN)
Appl. No. 16/349,619
Filed by HKC Corporation Limited, Shenzhen (CN); and Chongqing HKC Optoelectronics Technology Co., Ltd., Chongqing (CN)
PCT Filed May 26, 2017, PCT No. PCT/CN2017/086145
§ 371(c)(1), (2) Date May 14, 2019,
PCT Pub. No. WO2018/205316, PCT Pub. Date Nov. 15, 2018.
Claims priority of application No. 2017 1 0321257 (CN), filed on May 9, 2017.
Prior Publication US 2019/0377206 A1, Dec. 12, 2019
Int. Cl. G02F 1/13 (2006.01); G02F 1/1335 (2006.01); G02F 1/1362 (2006.01); G02F 1/1368 (2006.01)
CPC G02F 1/1309 (2013.01) [G02F 1/1368 (2013.01); G02F 1/133528 (2013.01); G02F 1/136259 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A repairing method for abnormal pixel spots of a display panel, comprising the following steps:
installing a polarizing plate on a display panel;
finding and marking abnormal pixel spots on the polarizing plate;
irradiating the abnomial pixel spots by using specific light rays to form a shading portion to reduce a luminous flux;
the polarizing plate successively comprising a first film layer, a polarizing layer, a second film layer and a pressure sensitive adhesive layer from outside to inside;
the display panel comprising a first substrate and a second substrate, installing an active switch on the first substrate, and a step of finding and marking the abnormal pixel spots on the polarizing plate comprising:
finding and marking first reference abnormal pixel bright spots on the first substrate:
finding and marking second reference abnormal pixel bright spots on a filter position;
finding and marking abnormal pixel bright spots corresponding to the polarizing plate through the first reference abnormal pixel bright spots and the second reference abnormal pixel bright spots;
a step of irradiating the abnormal pixel spots by using specific light rays to form a shading portion to reduce a luminous flux comprising: processing the polarizing layer by using the specific light rays, and changing optical polarization structures at the abnormal pixel spots corresponding to the polarizing plate to form the shading portion;
the polarizing plate, comprising a first polarizing plate disposed on a light-emitting surface of the display panel and a second polarizing plate disposed on a light-entry surface of the display panel;
a step of processing the polarizing layer by using the specific light rays and changing optical polarization structures at the abnormal pixel spots to form the shading portion comprising: processing the polarizing layer of the first polarizing plate by using the specific light rays and changing the optical polarization structures at the abnormal pixel spots to form the shading portion; and
the specific light rays comprising low-wavelength infrared rays or picosecond laser or ultraviolet light, wherein luminous flux of repaired optical polarization structures at the abnormal pixel bright spots is equal to luminous flux of original optical polarization structures.