公开(公告)号：US20220137781A1

公开(公告)日：2022-05-05

申请号：US17419321

申请日：2019-07-24

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Wei-Chou Chen ,  Chen-Mu Chang ,  Wong Haoping ,  Yu Cheng Tsai ,  Jyun-Cheng Lin

IPC: G06F3/041

Abstract: An apparatus can include a calibration circuit to determine a backlight status of a display device based on a detected difference in a noise level corresponding to the display device. The calibration circuit can perform an operation to calibrate a touchscreen coupleable to the display device based on the determined backlight status.

公开(公告)号：US20230064571A1

公开(公告)日：2023-03-02

申请号：US17796727

申请日：2020-01-31

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Shih-Jen Chang ,  Jyun-Cheng Lin ,  Cheng-Hua Yu ,  Hogan Hote Yeh

IPC: G06F3/0354

Abstract: Examples of nibs for styluses are described. In an example, the nib is made of a base material (for example, a polyamide or a polycarbonate), a conductive material (for example, carbon fiber), and a grey color controlling material (for example, a white powder). The base material is in a range of 70 weight percentage (wt %) to 75 wt %. The conductive material is in a range of 15 wt % to 20 wt %. The grey color controlling material in a range of 5 wt % to 10 wt %.