Electrooptical display device

Claim 2

An electooptical display device according to claim 1, wherein said adjusting circuit includes a function to adjust said deformation of said wave-form by rapidly making the driving voltage applied to both terminals of said display panel varied.

Claim 3

An electrooptical display device according to claim 1, wherein said adjusting circuit includes a positive feedback function to rapidly increase a current flown into a load of said display panel.

Claim 4

An electrooptical display device according to claim 1, wherein said positive feedback function of said adjusting circuit can provide an operation to generate charge current sufficient to fully charge a total capacitance of said display panel, mainly comprising a plurality of liquid crystals, in a short time.

Claim 5

An electrooptical display device according to claim 1, wherein said current detection means of said adjusting circuit is connected any one of said common electrode driving circuit and said segment electrode driving circuit, while said voltage control means thereof is connected to an opposite electrode driving circuit to which said current detection means connects.

Claim 6

An electrooptical display device according to claim 1, wherein said current detection means of said adjusting circuit is connected any one of said common electrode driving circuit and said segment electrode driving circuit, while said voltage control means thereof is connected to the same electrode driving circuit to which said current detection means connects.

Claim 7

An electrooptical display device according to claim 1, wherein both of said current detection means and said voltage control means of said adjusting circuit are connected both of said common electrode driving circuit and:said segment electrode driving circuit.

Claim 8

An electrooptical display device according to claim 1, wherein said current detection means of said adjusting circuit is connected any one of said common electrode driving circuit and said segment electrode driving circuit, while said voltage control means thereof is connected to both of said common electrode driving circuit and said segment electrode driving circuit.

Claim 9

An electrooptical display device according to claim 1, wherein a voltage controlling operation of said voltage control means of said adjusting circuit and current detecting operation of said a current detection means thereof are not applied to a selected common electrode in said common electrode group.

Claim 10

An electrooptical display device according to claim 1, wherein at least one of said current detection means and said voltage control means of said adjusting circuit is connected only to common electrodes not selected by said common electrode driving circuit.

Claim 11

An electrooptical display device according to claim 1, wherein a plurality of segment electrode driving voltage are applied to said segment electrode driving circuit from a plurality of segment electrode driving voltage sources.

Claim 12

An electrooptical display device according to claim 11, wherein said adjusting circuit is provided with a plurality of said voltaae control means or a plurality of said current detection means each of which connected to said plurality of segment electrode driving voltage sources, respectively.

Claim 13

An electrooptical display device according to claim 11, wherein said adjusting circuit is provided with a current detection means connected to said common electrode driving circuit and a plurality of segment electrode driving voltage control means connected to said segment electrode driving circuit and to which a plurality of said segment electrode driving voltage are applied, wherein each one of said segment electrode driving voltage control means is controlled by an output signal output from said current detection means.

Claim 14

An electrooptical display device according to claim 11, wherein said adjusting circuit is provided with a common electrode voltage control means connected to said common electrode driving circuit and a plurality of segment electrode driving current detection means connected to said segment electrode driving circuit and to which a plurality of said segment electrode driving voltage are applied, wherein said common electrode voltage control means is controlled by each one of output signals output from said each one of said current detection means.

Claim 15

An electrooptical display device according to claim 8, wherein both of said current detection means and a first voltage control means of said adjusting circuit are connected to any one of said common electrode driving circuit and segment electrode driving circuit and said adjusting circuit is further provided with a second voltage control means separate from said first voltage control means which is connected to an opposite electrode driving circuit to which said first voltage control means connects.

Claim 16

An electrooptical display device according to claim 15, wherein said second voltage control means is controlled by an output signal output from said current detection means.

Claim 17

An electrooptical display device according to claim 1, wherein said current detection means of said adjusting circuit comprises an operational amplifier and a current detection resister provided at an output portion of said operational amplifier and said output of said operational amplifier is connected to said voltage control means and fed back to a negative input treminal of said operational amplifier through said current detection resirter, wherein said negative input terminal of said operational amplifier being connected to any one of said common electrode driving circuit and said segment electrode driving circuit, while a positive input terminal of said operational amplifier is set at a reference voltage level of any one of said common and segment electrode driving voltage which is applied to any one of said common and segment electrode driving circuit to which said negative input terminal of said operational amplifier connects.

Claim 18

An electrooptical display device according to claim 1, wherein said voltage control means of said adjusting circuit comprises an operational amplifier an output terminal of which connects to a negative input terminal thereof through a feed-back resister and further connects to any one of said common electrode driving circuit and segment electrode driving circuit, while a positive input terminal of said operational amplifier is set at a reference voltage level of any one of said common and segment element driving voltage supplied to any one of said common and segment electrode driving circuit to which an output terminal of said operational amplifier connects, and said negative input terminal thereof is set at a certain voltage level determined by processing a predetetmined voltage set at said positive input terminal and a voltage cause and varied by current flown into said display panel.

Claim 19

An electrooptical display device according to claim 14, wherein said adjusting circuit comprises a first current detection means connected to one of said plurality of segment electrode driving voltage source and detecting current flown through said segment electrode driving circuit, a second current detection means connected to another one of said segment electrode driving voltage source different from one to which said first current detection means connects and detecting current flown through said segment electrode driving circuit and a voltage control means connected to both of said first and second current detection means and driving voltage source and further connected to said common electrode driving circuit, wherein current detection means having the same construction as defined by the claim 17 is used as said fist and second current detection means while a voltage control means having the same construction as defined by the claim 18 is used as said voltage control means and said device is further characterised in that output of said first and second current detection means are input to said negative input terminal of said voltage control means and each one of said reference voltages of said plurality of segment electrode driving voltage sources being input to said positive input terminal of said voltage control means.

Claim 20

An electrooptical display device according to claim 13, wherein said adjusting circuit comprises a current detection means detecting current flown through said common electrode driving circuit, a first voltage control means connected to one of said plurality of segment electrode driving voltage source and a second voltage control means connected to another one of said segment electrode driving voltage source different from one to which said first voltage control means connects, wherein a current detection means having the same construction:as defined by the claim 17 is used as said current detection means while a plurality of voltage control means having the same construction as defined by the claim 18 are used as said first and second voltage control means and said device is further characterized in that an output of said current detection means is input to said negative input terminal of said voltage control mean and each one of said reference voltages of said plurality of segment electrode driving voltage source being input to positive input terminals of said first and second voltage control means.

Claim 21

An electrooptical display device according to claim 6, wherein said adjusting circuit comprises a circuit construction in which a current detection function for detecting current flown through said common or segment electrode driving circuit is integrated with a voltage controlling function for controlling a voltage of said common or segment electrode to form one circuit and said adjusting circuit comprising operational amplifier and wherein an output of said operational amplifier is connected to said common or segment electrode driving circuit and fed backed to a negative input terminal thereof while a positive input terminal thereof is set at a reference voltage level corresponding to said common or segment electrode driving voltage at which said common or segment electrode shold be set, and said adjusting circuit is further characterized in that said output of said operational amplifier is positively fed back to said positive input terminal thereof through a capacitance.

Claim 22

An electrooptical display device according to claim 21, wherein a resister is inserted in said positive feed-back circuit.

Claim 23

An electrooptical display device according to claim 21, wherein said adjusting circuit comprises said current detection means having a function for detecting current flown through said common electrode driving circuit and said voltage control means for controlling a voltage of said common electrode.

Claim 24

An electrooptical display device according to claim 14, wherein said adjusting circuit comprises a first current detection means connected to one of said plurality of segment electrode driving voltage source and detecting current flown through said segment electrode driving circuit, a second current detection means connected to another one of said segment electrode driving voltage source different from one to which said first current detection means connects and detecting current flown through said segment electrode driving circuit and a voltage control means connected to both of said first and second current detection means and driving voltage source and further connected to said common electrode driving circuit, wherein a current detection means having the same construction as defined by the claim 21 is used as said first and second current detection means while a voltage control means having the same construction as defined by the claim 18 is used as said voltage control means and said device is further characterized in that outputs of said first and second current detection means are input to said negative input terminal of said voltage control means and each one of said reference voltages of said plurality of segment electrode driving voltage sources being input to said positive input terminal of said voltage control means.

Claim 25

An electrooptical display device according to claim 1, wherein said first and second current detection means of said adjusting circuit is consisted only of a resister.

Claim 26

An electrooptical display device according to claim 25, wherein said resisters is mounted on a substrate of said display panel.

Claim 27

An electrooptical display device according to claim 26, wherein said resisters of both firs and second current detection means of said adjusting circuit are mounted on a substrate of said display panel and said resister includes an inner resistance of said display panel.

Claim 28

An electrooptical display device according to claim 17, wherein said current detection resisters of said current detection means of said adjusting circuit are mounted on a substrate of said display panel.

Claim 29

An electrooptical display device according to claim 28, wherein said current detection resisters of said current detection means of said adjusting circuit are mounted on a circuit substrate of said display panel and said resister includes an inner resistance of said display panel.

Claim 30

An electrooptical display device according to claim 19, wherein each one of said first and second current detection means of said adjusting circuit consists of coils and a plurality of primary coils thereof connected between a reference voltage source of said any one of said segment and common electrode driving voltage and any one of said segment and common electrode driving circuits, while a plurality of secondary coils thereof connected to said voltage control meams.

Claim 31

An electrooptical display device according to claim 1, wherein said current detection means of said adjusting circuit has a function for detecting a total current flown through overall said liquid crystal display panel while said voltage control means ha a function for adjusting voltage variation of both maid common and segment electrode driving voltages of said display panel.