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US 6,617,799 B2Granted
EL display device and driving method thereof
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorJun Koyama
Life of this patent
Estimating the term…
Abstract
The present invention is characterized by adding a bit having the value of one below the least significant bit of n bit digital data having red image information inputted from the external, adding a bit having the value of zero above the most significant bit of n bit digital data having green image information inputted from the external, and adding a bit having the value of zero above the most significant bit of n bit digital data having blue image information inputted from the external, whereby producing (n+1) bit digital data having red image information, (n+1) bit digital data having green image information, and (n+1) bit digital data having blue image information, respectively, for displaying an image.
Claims12
An EL display device comprising:
- a circuit for converting n bit digital data having red image information, n bit digital data having green image information, and n bit digital data having blue image information (n is a natural number) inputted from the external into (n+1) bit digital data having red image information, (n+1) bit digital data having green image information, and (n+1) bit digital data having blue image information, respectively;
- and
- a time-division circuit for generating digital data signals from the (n+1) bit digital data having red, green and blue information.
An EL display device comprising:
- a circuit for converting n bit digital data having red image information, n bit digital data having green image information, and n bit digital data having blue image information (n is a natural number) inputted from the external into (n+1) bit digital data having red image information, (n+1) bit digital data having green image information, and (n+1) bit digital data having blue image information, respectively;
- and
- a time-division circuit for generating digital data signals by dividing one frame into (n+1) subframes (SF1, SF2, SF3, . . . SF(n−1), SF(n), and SF(n+1)) and selecting an address time period (Ta) and a sustain time period (Ts1, Ts2, Ts3, . . . Ts(n−1), Ts(n), and Ts(n+1) for SF1, SF2, SF3, . . . SF(n−1), SF(n), and SF(n+1), respectively) for each of said (n+1) subframes, said sustain time periods for said (n+1) subframes being set so that Ts1:Ts2:Ts3:
- . . . :Ts(n−1):Ts(n):Ts(n+1)=20:2−1:2−2:
- . . . :2−(n−2):2−(n−1):2−n.
2 more elements
An EL display device comprising:
- means for adding a bit having the value of one below the least significant bit of n bit digital data having red image information inputted from the external;
- means for adding a bit having the value of zero above the most significant bit of n bit digital data having green image information inputted from the external;
- and
- means for adding a bit having the value of zero above the most significant bit of n bit digital data having blue image information inputted from the external.
1 more element
An EL display device comprising:
- a circuit for converting n bit digital data having red image information, n bit digital data having green image information, and n bit digital data having blue image information (n is a natural number) inputted from the external into (n+1) bit digital data having red image information, (n+1) bit digital data having green image information, and (n+1) bit digital data having blue image information, respectively;
- a time-division circuit for generating digital data signals from the (n+1) bit digital data having red, green and blue information;
- a data signal side driving circuit connected to the time-division circuit;
- and
- an active matrix circuit connected to the data signal side driving circuit.
2 more elements
An EL display device comprising:
- a circuit for converting n bit digital data having red image information, n bit digital data having green image information, and n bit digital data having blue image information (n is a natural number) inputted from the external into (n+1) bit digital data having red image information, (n+1) bit digital data having green image information, and (n+1) bit digital data having blue image information, respectively;
- a time-division circuit for generating digital data signals by dividing one frame into (n+1) subframes (SF1, SF2, SF3, . . . SF(n−1), SF(n), and SF(n+1)) and selecting an address time period (Ta) and a sustain time period (Ts1, Ts2, Ts3, . . . Ts(n−1), Ts(n), and Ts(n+1) for SF1, SF2, SF3, . . . SF(n−1), SF(n), and SF (n+1), respectively) for each of said (n+1) subframes, said sustain time periods for said (n+1) subframes being set so that Ts1:Ts2:Ts3:
- . . . :Ts(n−1):Ts(n):Ts(n+1)=20:2−1:2−2:
- . . . :2−(n−2):2−(n−1):2−n;
- a data signal side driving circuit connected to the time-division circuit;
- and
- an active matrix circuit connected to the data signal side driving circuit.
4 more elements
An EL display device comprising:
- means for adding a bit having the value of one below the least significant bit of n bit digital data having red image information inputted from the external;
- means for adding a bit having the value of zero above the most significant bit of n bit digital data having green image information inputted from the external;
- and
- means for adding a bit having the value of zero above the most significant bit of n bit digital data having blue image information inputted from the external;
- means for generating digital data signals from the (n+1) bit digital data having red, green and blue information.
2 more elements
Dependencies are inferred from the claim text.