公开(公告)号：US20170147086A1

公开(公告)日：2017-05-25

申请号：US15361025

申请日：2016-11-24

申请人： Darfon Electronics Corp.

发明人： Chien-Hsin Lee ,  Wei-Chan Sung

IPC分类号： G06F3/023

CPC分类号： G06F3/0233 ,  G06F3/023 ,  H03M11/20

摘要： A keyboard device includes M driving circuits DC(1)˜DC(M), N transition circuits TC(1)˜TC(N), a control module, M column signal lines C(1)˜C(M), N row signal lines R(1)˜R(N) and M*N key units KU(1,1)˜KU(M,N). The control module performs a scanning process to sequentially scan the M column signal lines C(1)˜C(M) in M scan cycles scan(1)˜scan(M). If the key unit KU(k,x) connected with the k-th column signal line C(k) and the x-th row signal line R(x) is depressed, a scan voltage is transmitted from the k-th column signal line C(k) to the x-th row signal line R(x) through a switch sw(k,x) of the key unit KU(k,x). The transition circuit TC(x) connected with the x-th row signal line R(x) is turned on according to the scan voltage. Consequently, an output voltage Rout(x) from the transition circuit TC(x) has a first voltage level.

公开(公告)号：US09921664B2

公开(公告)日：2018-03-20

申请号：US15361025

申请日：2016-11-24

申请人： Darfon Electronics Corp.

发明人： Chien-Hsin Lee ,  Wei-Chan Sung

IPC分类号： G06F3/02 ,  G09G5/00 ,  G06F3/023

CPC分类号： G06F3/0233 ,  G06F3/023 ,  H03M11/20

摘要： A keyboard device includes M driving circuits DC(1)˜DC(M), N transition circuits TC(1)˜TC(N), a control module, M column signal lines C(1)˜C(M), N row signal lines R(1)˜R(N) and M*N key units KU(1,1)˜KU(M,N). The control module performs a scanning process to sequentially scan the M column signal lines C(1)˜C(M) in M scan cycles scan(1)˜scan(M). If the key unit KU(k,x) connected with the k-th column signal line C(k) and the x-th row signal line R(x) is depressed, a scan voltage is transmitted from the k-th column signal line C(k) to the x-th row signal line R(x) through a switch sw(k,x) of the key unit KU(k,x). The transition circuit TC(x) connected with the x-th row signal line R(x) is turned on according to the scan voltage. Consequently, an output voltage Rout(x) from the transition circuit TC(x) has a first voltage level.

公开(公告)号：US20180120951A1

公开(公告)日：2018-05-03

申请号：US15859824

申请日：2018-01-02

申请人： Darfon Electronics Corp.

发明人： Chien-Hsin Lee ,  Wei-Chan Sung

IPC分类号： G06F3/023

CPC分类号： G06F3/0233 ,  G06F3/023 ,  H03M11/20

摘要： A keyboard device includes M driving circuits DC(1)˜DC(M), N transition circuits TC(1)˜TC(N), a control module, M column signal lines C(1)˜C(M), N row signal lines R(1)˜R(N) and M*N key units KU(1,1)˜KU(M,N). The control module performs a scanning process to sequentially scan the M column signal lines C(1)˜C(M) in M scan cycles scan(1)˜scan(M). If the key unit KU(k,x) connected with the k-th column signal line C(k) and the x-th row signal line R(x) is depressed, a scan voltage is transmitted from the k-th column signal line C(k) to the x-th row signal line R(x) through a switch sw(k,x) of the key unit KU(k,x). The transition circuit TC(x) connected with the x-th row signal line R(x) is turned on according to the scan voltage. Consequently, an output voltage Rout(x) from the transition circuit TC(x) has a first voltage level.

公开(公告)号：US10073539B2

公开(公告)日：2018-09-11

申请号：US15859824

申请日：2018-01-02

申请人： Darfon Electronics Corp.

发明人： Chien-Hsin Lee ,  Wei-Chan Sung

IPC分类号： G06F3/02 ,  G09G5/00 ,  G06F3/023 ,  H03M11/20

CPC分类号： G06F3/0233 ,  G06F3/023 ,  H03M11/20

摘要： A keyboard device includes M driving circuits DC(1)˜DC(M), N transition circuits TC(1)˜TC(N), a control module, M column signal lines C(1)˜C(M), N row signal lines R(1)˜R(N) and M*N key units KU(1,1)˜KU(M,N). The control module performs a scanning process to sequentially scan the M column signal lines C(1)˜C(M) in M scan cycles scan(1)˜scan(M). If the key unit KU(k,x) connected with the k-th column signal line C(k) and the x-th row signal line R(x) is depressed, a scan voltage is transmitted from the k-th column signal line C(k) to the x-th row signal line R(x) through a switch sw(k,x) of the key unit KU(k,x). The transition circuit TC(x) connected with the x-th row signal line R(x) is turned on according to the scan voltage. Consequently, an output voltage Rout(x) from the transition circuit TC(x) has a first voltage level.