公开(公告)号：US20190318134A1

公开(公告)日：2019-10-17

申请号：US15953718

申请日：2018-04-16

Applicant: Dell Products, L.P.

Inventor： Yong-Teng Lin ,  Geroncio Ong Tan ,  Timothy C. Shaw ,  No-Hua Chuang ,  Erh-Chieh Chang ,  Chih-Hao Chen ,  Wen-Pin Huang

IPC: G06F21/83 ,  G06F21/71 ,  G06F3/02 ,  H01H13/807

Abstract: Systems and methods for a hack-proof security keyboard are described. In some embodiments, a keyboard module may include a first circuit configured to detect activation of a plurality of keys and a second circuit configured to detect activation of a subset of the plurality of keys, where the second circuit overlies the first circuit. In other embodiments, a method may include detecting an electrical signal received from a secondary membrane of a keyboard, where the keyboard includes a primary membrane configured to detect individual activation of any of a plurality of keys, and where the secondary membrane is configured to output the electrical signal in response to concurrent activation of a subset of the plurality of keys. The method may also include performing a selected action in response to the detection.

公开(公告)号：US20230245613A1

公开(公告)日：2023-08-03

申请号：US17589496

申请日：2022-01-31

Applicant: Dell Products L.P.

Inventor： Chun-Yi Chang ,  Yi-Fan Wang ,  Meng-Feng Hung ,  No-Hua Chuang ,  Yu Sheng Chang

IPC: G09G3/20 ,  G09G3/36

CPC classification number: G09G3/2096 ,  G09G3/36 ,  G09G2360/06 ,  G09G2370/04 ,  G09G2310/08 ,  G09G2360/12

Abstract: An information handling system includes a host processing system and a Liquid Crystal Display device. The host processing system includes a graphics processing unit (GPU) and the LCD device includes a memory device and a DisplayPort Configuration Data (DPCD) register. The host processing system 1) determines whether the first GPU supports a Dynamic Display Shifting (DDS) mode, 2) when the GPU does not support the DDS mode, provides a first indication to the LCD device that the GPU does not support the DDS mode, and 3) when the GPU supports the DDS mode, provides a second indication to the LCD device that the GPU supports the DDS mode. The LCD device retrieves a Panel Self Refresh (PSR) setting from the memory device and stores the PSR setting to the DPCD register in response to the first indication, and retrieves a DDS setting from the memory and stores the DDS setting to the DPCD register in response to the second indication.

公开(公告)号：US11922855B2

公开(公告)日：2024-03-05

申请号：US17589496

申请日：2022-01-31

Applicant: Dell Products L.P.

Inventor： Chun-Yi Chang ,  Yi-Fan Wang ,  Meng-Feng Hung ,  No-Hua Chuang ,  Yu Sheng Chang

IPC: G09G3/20 ,  G09G3/36

CPC classification number: G09G3/2096 ,  G09G3/36 ,  G09G2310/08 ,  G09G2360/06 ,  G09G2360/12 ,  G09G2370/04

Abstract: An information handling system includes a host processing system and a Liquid Crystal Display device. The host processing system includes a graphics processing unit (GPU) and the LCD device includes a memory device and a DisplayPort Configuration Data (DPCD) register. The host processing system 1) determines whether the first GPU supports a Dynamic Display Shifting (DDS) mode, 2) when the GPU does not support the DDS mode, provides a first indication to the LCD device that the GPU does not support the DDS mode, and 3) when the GPU supports the DDS mode, provides a second indication to the LCD device that the GPU supports the DDS mode. The LCD device retrieves a Panel Self Refresh (PSR) setting from the memory device and stores the PSR setting to the DPCD register in response to the first indication, and retrieves a DDS setting from the memory and stores the DDS setting to the DPCD register in response to the second indication.

公开(公告)号：US10853525B2

公开(公告)日：2020-12-01

申请号：US15953718

申请日：2018-04-16

Applicant: Dell Products, L.P.

Inventor： Yong-Teng Lin ,  Geroncio Ong Tan ,  Timothy C. Shaw ,  No-Hua Chuang ,  Erh-Chieh Chang ,  Chih-Hao Chen ,  Wen-Pin Huang

IPC: G06F21/00 ,  G06F21/83 ,  G06F21/71 ,  G06F3/02 ,  H01H13/807 ,  H01H13/703 ,  H01H13/785

Abstract: Systems and methods for a hack-proof security keyboard are described. In some embodiments, a keyboard module may include a first circuit configured to detect activation of a plurality of keys and a second circuit configured to detect activation of a subset of the plurality of keys, where the second circuit overlies the first circuit. In other embodiments, a method may include detecting an electrical signal received from a secondary membrane of a keyboard, where the keyboard includes a primary membrane configured to detect individual activation of any of a plurality of keys, and where the secondary membrane is configured to output the electrical signal in response to concurrent activation of a subset of the plurality of keys. The method may also include performing a selected action in response to the detection.