US 12,008,201 B2
Display device and an operating method thereof
Yuna Kim, Seoul (KR); Hee Seomoon, Seoul (KR); Soojung Lee, Suwon-si (KR); Seungwook Chun, Daegu (KR); and Boram Choi, Asan-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-Si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on May 24, 2021, as Appl. No. 17/328,038.
Claims priority of application No. 10-2020-0109534 (KR), filed on Aug. 28, 2020.
Prior Publication US 2022/0066615 A1, Mar. 3, 2022
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/04186 (2019.05) [G06F 3/0412 (2013.01); G06F 3/0414 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A display device, comprising:
a display panel;
a first input sensor disposed on a first side of the display panel and configured to generate a first reception signal in response to a user input;
a second input sensor spaced apart from the first input sensor on the first side of the display panel and configured to generate a second reception signal in response to the user input;
a first adhesive member disposed between the first side of the display panel and the first input sensor;
a second adhesive member disposed between the first side of the display panel and the second input sensor;
a readout circuit configured to generate an output signal corresponding to the user input in response to the first reception signal and the second reception signal; and
a window overlapping the display panel,
wherein the readout circuit comprises:
an analog to digital converter configured to convert the first reception signal received from the first input sensor and the second reception signal received from the second input sensor into a first digital reception signal and a second digital reception signal, respectively;
a force calculation unit configured to convert the first digital reception signal and the second digital reception signal into a force signal based on one of a sum and an average of the first digital reception signal and the second digital reception signal;
a lookup table for storing a grip force signal corresponding to the force signal; and
a grip force calculation unit configured to convert the force signal into the grip force signal based on the lookup table,
wherein a correlation between one of a sum and an average of the first digital reception signal and the second digital reception signal and the force signal is determined depending on a material of the window,
wherein the display device further comprises:
an input sensing layer disposed on a second side of the display panel; and
an anti-reflective layer disposed on the input sensing layer, wherein an empty space exists where the anti-reflective layer overlaps the first input sensor or the second input sensor since the input sensing layer is not in an area of the first and second input sensors,
wherein an edge of the input sensing layer, an edge of the first input sensor and an edge of the first adhesive member contact a line that extends through the display panel and is perpendicular to top and bottom surfaces of the display panel.