CN1835054A - Display device - Google Patents

Abstract

A display device of the invention includes horizontal lines, longitudinal lines, electron emission elements, and a scanning circuit which performs the selection of the horizontal lines. The scanning circuit includes a non-selection voltage switch, a correction selection voltage switch, and an output voltage detection switch for the selected horizontal line for every horizontal line. The display device also includes a differential amplifier which is connected to a correction selection voltage input line, a horizontal line selection voltage line, and a correction selection voltage output line for every plurality of horizontal lines. The invention can suppress a voltage drop of the horizontal lines and, at the same time, can suppress the brightness irregularities of the display device.

Description

Display device

Technical field

The sweep circuit that the row wiring of the display board of the present invention relates to have many row wirings (horizontal line) and many column wirings (longitudinal line) is selected.

The present invention relates to revise the display device of the voltage drop on the sweep trace (row wiring), particularly use the display device of mim type electronic emission element.

Background technology

Up to the present, as the cold cathode electronic emission element, for example, insulator/metal layer/metal mold electronic emission element (to call " mim type electronic emission element " in the following text) is known.This mim type electronic emission element by the upper/lower electrode that clips insulation course is applied voltage, makes electronics come out from the surface emitting of electrode.

In this mim type electronic emission element, flow into upper electrode from about 95% of lower electrode ejected electron, and do not carry out the electronics emission, thus on the row wiring that is connected on the upper electrode, produce voltage drop, thus brightness disproportionation produced.In order to prevent to produce this phenomenon, people are studying the mode of revising the voltage that is connected the column wiring on the lower electrode.

But in the mim type electronic emission element, because the stray capacitance of column wiring is big, so can produce such problem: the column wiring voltage amplitude that is caused by correction increases, and the power consumption that causes constituting the data driver of the modulation circuit that drives column wiring increases.

In patent documentation 1 (TOHKEMY 2004-86130 communique), disclose a kind of display device, had the feedback scan circuit output voltage and revise the row of the input voltage of sweep circuit output circuit is selected voltage modification circuit.

In patent documentation 1, patent documentation 2 (No. the 2619001st, Jap.P.), disclose a kind of row and selected voltage modification circuit, suppressed the variation in voltage of going selection voltage of connecting by the output of electric current that flows into row wiring and the sweep circuit that is connected row wiring that voltage drop that resistance produces causes.

Summary of the invention

In the correction circuit of the Figure 17 shown in the above-mentioned patent documentation 1, increased the resistance feedback of using operational amplifier 205.As a result, the voltage and the reference voltage of lead-out terminal 207 are unequal, can not revise fully by the output of electric current that flows into row wiring and sweep circuit and connect the voltage drop that resistance produces.

In addition, in the correction circuit of the Figure 26 shown in the above-mentioned patent documentation 1, each row wiring output is provided with the voltage output follower that has used operational amplifier 503,, makes that output 501 is constant by the grid of operational amplifier 503 driving FET502.But for voltage constant ground action between the drain-source that makes FET502, the gate source voltage across poles will change with the electric current that flows into row wiring, and it is bigger to connect resistance variations, and the time constant of row wiring change in voltage changes.In addition, do not consider the situation of the row of exporting by public operational amplifier correction more yet.

In patent documentation 3 (No. the 3311201st, Jap.P.), because carry out connecting the correction of the voltage drop that resistance causes with the voltage correction of the pulse that outputs to column wiring by the output of sweep circuit, so, as mentioned above, produce following problem: the power consumption that constitutes the data driver of the modulation circuit that drives column wiring increases because of the column wiring voltage amplitude that correction causes.

In above-mentioned patent documentation 2,3, only revised by the output of electric current that flows into row wiring and sweep circuit and connected the voltage drop that resistance produces, and do not considered the correction of the voltage drop that produces by row wiring resistance.In addition, do not consider sweep circuit is set the correction when driving simultaneously from both sides by the voltage drop of exporting the generation of connection resistance with delegation in the both sides of display board yet.

The present invention can alleviate the increase of the power consumption of the data driver that the column wiring amplitude increase that caused by correction causes, and can carry out high-precision voltage correction.

Display device of the present invention comprises: display board has the backboard of a plurality of electronic emission elements that comprise many row wirings, many column wirings and be connected with these wirings and has the header board that is applied in anode voltage; Carry out the sweep circuit of the selection of above line wiring; And the modulation circuit that above-mentioned column wiring is applied modulation voltage.Above-mentioned sweep circuit (6) has in each provisional capital: non-selector switch (42), be arranged between sweep circuit output point and the power lead, and connect, disconnect non-selection voltage; Selector switch (41) is arranged on sweep circuit output point and correction and selects between the voltage generation circuit output wiring (48), and connection, disconnection correction are selected voltage; And detect with switch (43), be arranged on sweep circuit output point and correction and select to detect the voltage of selection row between the voltage generation circuit input wiring; And, every many row wirings have one to be revised and selects voltage generation circuit (34), it comprise the 1st input with revise select that voltage generation circuit input wiring (46) is connected, the 2nd input be applied in row and select that the wiring of voltage is connected, output is exported the differential amplifier (44) that connect up (48) are connected with above-mentioned correction selection voltage generation circuit.

Because the input impedance height of differential amplifier selects voltage generation circuit input wiring and detection with not flowing through steady current in the switch so revise, therefore, the 1st input voltage of differential amplifier equates with sweep circuit output point voltage.The result, can revise the output voltage of differential amplifier, make the output point voltage of sweep circuit select voltage to equate, and have nothing to do with the falling quantity of voltages of selecting the resistance of voltage generation circuit output wiring and selector switch to produce by the electric current that flows into row wiring, correction with the row of the 2nd input that imposes on differential amplifier.Therefore, can connect the voltage drop that resistance produces by the output of electric current that flows into row wiring and sweep circuit with the high precision correction.In addition, the source voltage of selector switch changes with the variation of the electric current that flows into row wiring, therefore, can reduce the variation of gate source voltage across poles, can reduce to connect the variation of resistance and time constant.

Feedback switch is connected during the non-selection that selector switch and detection disconnect with switch, therefore can prevent the output instability of cutting off backfeed loop when selection is gone and causing differential amplifier switching.

Be later than the selector switch of selection row constantly and detect the connection moment of using switch by the disconnection that makes feedback switch, when rising to selection voltage from non-selection voltage, the output voltage of sweep circuit produces under the situation of initial rapid potential change, therefore the variation of the input voltage of differential amplifier can not be later than output voltage, can reduce to export to the overshoot (over shoot) of the selection voltage of row wiring.

In addition, the sweep circuit of display device of the present invention has to revise selects voltage generation circuit, this correction selects voltage generation circuit to revise, voltage that make to select the sweep circuit output point of row is steady state value and irrelevant with video data, the modified value that modulation circuit output utilizes the voltage drop of the each several part of compensation row wiring to use has been carried out the modulation voltage of revising, above-mentioned voltage drop is that the falling quantity of voltages with the sweep circuit output point is zero, and is fixed according to display mode.

Superpose by the composition that flows to each electronic emission element from the sweep circuit output point the electric current that the row wiring from each electronic emission element is flowed to column wiring, ask the total current that flows to the end electronic emission element of row wiring from above-mentioned sweep circuit output point, from above-mentioned total current, deduct the electric current that flows to column wiring from row wiring from above-mentioned sweep circuit output point to m electronic emission element addition successively and the value that obtains, ask the electric current that between neighbor, flows through, electric current addition and the resistance value with each pixel on duty that obtains successively neighbor that will be from above-mentioned sweep circuit output point to m, ask voltage drop between neighbor, ask the voltage drop on each electronic emission element.

Display device of the present invention comprises: display board has the backboard of a plurality of electronic emission elements that comprise many row wirings, many column wirings and be connected with these wirings and has the header board that is applied in anode voltage; Carry out the sweep circuit of the selection of above line wiring; And the modulation circuit that above-mentioned column wiring is applied modulation voltage, this display device is characterised in that: above-mentioned sweep circuit, in order to drive the both sides that are arranged on display board with delegation simultaneously from both sides, have to revise and select voltage generation circuit, this correction selects voltage generation circuit to revise, the voltage of the sweep circuit output point about the selected row wiring of each sweep circuit about making is predetermined value, the revised modulation voltage of modified value that above-mentioned modulation circuit output utilizes the voltage drop of the each several part of compensation above line wiring to use, above-mentioned voltage drop is fixed according to display mode.

According to the present invention, the output voltage of modulation circuit does not comprise the modified value of being connected the voltage drop of resistance generation by scanner driver, therefore can reduce the output voltage amplitude, reduces power consumption, reduces the correction gray shade scale number in the data driver.

In addition, sweep circuit is arranged on the both sides of display board, when driving with delegation simultaneously, also can obtains same effect from both sides.

Long-pending and computing in horizontal scan period becomes the long-pending and computing of the N * N that is used to calculate total current.With respect to the long-pending and computing of carrying out N N * N in the patent documentation 1 described existing method, long-pending and computing can be reduced to 1/N significantly.

In addition, can compensate the voltage drop that causes by resistance from the output point of sweep circuit to the row wiring of the electronic emission element of the end that is configured in row wiring.

In addition, even the resistance of the row wiring of the electronic emission element from the scanner driver output point to the end that is configured in row wiring also can prevent the picture element deterioration because of the wiring configuration waits every provisional capital difference.

In sum, according to display device of the present invention, can realize high picture element, low-power consumption characteristic.In addition, because the number of times of long-pending and computing reduces, so can be with simple hardware.

According to display device of the present invention, can realize the high picture element characteristic that round-off error is little, the signal dependence of fluorescent lifetime is little.

In addition,, the differential amplifier output stabilization can be made, image abnormity can be prevented according to display device of the present invention.

In addition,, can reduce the overshoot of the selection voltage of exporting to row wiring according to display device of the present invention, can be with the High Accuracy Control luminous quantity.

Description of drawings

Fig. 1 is one-piece construction figure of the present invention (1).

Fig. 2 is the structural drawing of the data driver of modulation circuit shown in Figure 1.

Fig. 3 is the structural drawing of the scanner driver of sweep circuit shown in Figure 1.

Fig. 4 is the detailed structure view of correction voltage generation circuit 34 and output circuit 31 shown in Figure 3.

Fig. 5 is Fig. 2, data driver shown in Figure 3 and the driving sequential chart (1) of scanner driver.

Fig. 6 is the equivalent circuit diagram (1) of row wiring shown in Figure 1.

Fig. 7 is the voltage drop correction circuit figure (1) that is provided with in display controller shown in Figure 1.

Fig. 8 is Fig. 2, another data driver shown in Figure 3 and the driving sequential chart (2) of scanner driver.

Fig. 9 is another equivalent circuit diagram (2) of row wiring shown in Figure 1.

Figure 10 is another voltage drop correction circuit figure (2) that is provided with in display controller shown in Figure 1.

Figure 11 is another one-piece construction figure of the present invention (2).

Figure 12 is one-piece construction figure of the present invention (3).

Figure 13 is the structural drawing of the scanner driver of sweep circuit.

Figure 14 is the driving sequential chart of data driver and scanner driver.

Figure 15 is the voltage drop correction circuit figure (3) that is provided with in display controller.

Figure 16 is a detailed structure view of revising voltage generation circuit 34.

Figure 17 is the reference voltage generating circuit figure that is provided with in display controller 8.

Figure 18 is the structural drawing (3) of another scanner driver of sweep circuit.

Figure 19 is output circuit 91 and revises the detailed structure view of selecting voltage generation circuit 94.

Figure 20 is the unit 91-1 of output circuit and revises the wiring layout drawing of selecting between the voltage generation circuit 94.

Figure 21 is set another voltage drop correction circuit figure (4) in the display controller.

Figure 22 is set another voltage drop correction circuit figure (5) in the display controller.

Figure 23 is another one-piece construction figure of the present invention (4).

Embodiment

Below, use the description of drawings embodiments of the invention.

[embodiment 1]

Fig. 1 is the block diagram of the integrated circuit structure (1) of expression present embodiment.Display board 4 comprises backboard, header board and sidewall (not shown).Backboard have vertically column wiring 1 that (Y direction) extend, laterally (directions X) row wiring 2 of extending, be connected the electronic emission element 3 on 1 column wiring and 1 row wiring.Column wiring is shown many in transverse row, and row wiring vertically is being arranged with many.Electronic emission element is the mim type electronic emission element.Header board has fluorescent film 10 and covers the back of the body gold 11 that this fluorescent film 10 forms.The formation of backboard the face of electronic emission element 3 and header board formation the face of face relative, sidewall is configured in the opposite face of header board and backboard.This panel inside has been carried out exhaust.

Fluorescent film 10 is listed as relative configuration with each of mim type electronic emission element 3.Fluorescent film 10 comprises red, green, blue 3 primary colors.The 5th, to the modulation circuit of column wiring output modulation signal, 6-1,6-2 are that the sweep circuit of selecting is gone in the both sides that are configured in display board 4.

Drive power supply 7, provide high power supply voltage VGHH, non-selection voltage VGL, logical circuit voltage vcc to sweep circuit 6-1 and 6-2, provide maximum luminous voltage VEL, non-luminous voltage VEH, logical circuit voltage vcc to modulation circuit 5, provide maximum luminous voltage VEL, non-luminous voltage VEH, high power supply voltage VGHH, logical circuit voltage vcc to display controller 8.

Display controller 8, to vertical clock signal VCLK, beginning pulse VIO, the output switching signal STB of sweep circuit 6-1 and 6-2 output, export video data D0, D1, the D2 of n positions as horizontal clock signal HCLK, the beginning pulse HIO of control signal, output switching signal STB, modulation circuit with reference voltage V0～VM, corresponding with red, green, blue 3 to modulation circuit 5 outputs as control signal.

These control signals and the signal except modulation circuit is used reference voltage V0～VM all have the amplitude of logical circuit with voltage vcc.In addition, B-power 9 gold of supporting or opposing 11 provides the anode voltage VA that light-emitting phosphor is used.

Fig. 2 is the structural drawing that constitutes the data driver of modulation circuit 5 shown in Figure 1.This modulation circuit 5 is made up of the data driver that is connected in series.

In Fig. 2, the 25th, shift register (shift register) generates the latch signal that is used to be taken into video data; The 24th, data register (data register) is taken into simultaneously video data D00～D0n-1, D10～D1n-1, the D20～D2n-1 of 3 input and corresponding with red, green, blue output n positions successively from display controller; The 23rd, data latches (datalatch) synchronously is taken into video data from data register 24 with output switching signal STB; The 26th, the grayscale voltage generating unit, produce 2n grayscale voltage with reference voltage V0～VM by electric resistance partial pressure from the modulation circuit of display controller 8 outputs, the 22nd, demoder (decoder), corresponding to the n position video data of data latches 23 outputs, from 2n grayscale voltage, select voltage; The 21st, by the output circuit that voltage output follower (voltagefollower) is formed, be used for the output voltage of demoder 22 is exported to as output voltage Y1～Ym each column wiring 1 of display board 4.

HR/L is the signal that is used for determining the direction of displacement of shift register 25, is fixed as logical circuit with voltage vcc or ground voltage GND.Modulation circuit is the voltage that will carry out to the voltage the maximum luminous voltage VEL from non-luminous voltage VEH behind the branches such as M with reference voltage V0～VM, the divider resistance value that constitutes the resistance of grayscale voltage generating unit 26 equates that all the relation of gray shade scale and output voltage is linear.

Here, when a horizontal scan period begins, beginning pulse HIO is as HIO1 (or HIO2) the signal input of the 1st data driver, in shift register 25, synchronously be shifted with horizontal clock signal HCLK, when the output latch signal, 3 outputs side by side are taken into data register 24 successively with the video data of n position.

When the video data that carries out to data register 24 of the 1st data driver is taken into when finishing, the voltage of HIO2 (or HIO1) becomes the logical circuit voltage vcc, be input to the HIO1 (or HIO2) of the 2nd data driver, beginning is taken into to the video data of the 2nd data driver.

Like this, when all video datas when being taken into of data register 24 finished, before a horizontal scan period, synchronously be taken into all video datas to data latches 23 from data register 24 with the rising of output switching signal STB.The video data that is taken into converts grayscale voltage to by demoder 22 respectively, and grayscale voltage is exported to each column wiring by output circuit 21.

Fig. 3 is the structural drawing that constitutes the scanner driver of sweep circuit 6-1,6-2 shown in Figure 1.Sweep circuit is made of the scanner driver that is connected in series.

In Fig. 3, the 33rd, shift register generates the selection signal that is used for switching successively in each horizontal scan period the selection row; The 32nd, level shifter is the level of high power supply voltage VGHH-non-selection voltage VGL from logical circuit with the level conversion of voltage Vcc-GND with the output of shift register 33; The 31st, by the output circuit that the CMOS circuit for reversing is formed,, will select voltage VGH or non-selection voltage VGL to export to each row wiring 2 of display board 4 as output voltage G1～G1 corresponding to the output of the shift register 33 that has carried out level shift.The 34th, revise and select voltage generation circuit, produce the correction that is input to output circuit 31 and select voltage VO.VR/L is a signal of determining that the direction of displacement of shift register is used, is fixed in logical circuit with voltage vcc or ground voltage GND.

Here, when a vertical scanning period began, beginning pulse VIO was as VIO1 (or VIO2) the signal input of the 1st scanner driver, in each horizontal scan period, synchronously be shifted with vertical clock signal VCLK in shift register 33, signal is selected in output successively.

Next, the logic product of the reverse signal of selection signal of being exported and output switching signal STB, by level shifter 32 level shifts is the level of high power supply voltage VGHH-non-selection voltage VGL, be imported into output circuit 31 by revising the revised selection voltage VO that selects voltage generation circuit 34 to be generated, as selecting voltage VGH to output to the selection row wiring of display board 4, on the other hand, export non-selection voltage VGL to the non-selection row wiring of display board 4.

When the end-of-shift in the 1st scanner driver, the voltage of VIO2 (or VIO1) becomes the logical circuit voltage vcc, is input to the VIO1 (or VIO2) as the 2nd scanner driver, begins the displacement in the 2nd scanner driver.

Select all row so successively.Voltage generation circuit 34 is selected in the correction of each scanner driver, can move when VIO1 (or VIO2) imports, when VIO2 (or VIO1) stops action when being input to next scanner driver.

Fig. 4 represents the output circuit 31 in the scanner driver shown in Figure 3 and revises the detailed structure of selecting voltage generation circuit 34.31-1 is illustrated in the unit of the output circuit of each row setting.

In Fig. 4, the 41st, selector switch (pMOS), connect, disconnect revising and select the correction of voltage generation circuit 34 generations to select voltage VO, the 42nd, non-selector switch (nMOS), connect, disconnect non-selection voltage VGL, the 43rd, detect and use switch, the output voltage Gn conduct of carrying the output circuit of selecting row is to revising the input voltage VX that selects voltage generation circuit 34.

The 44th, differential amplifier, output correction is selected voltage VO, make and to flow through and row selection voltage VGH when not revising equates from no current in the input voltage VX of output circuit unit 31-1 and the row wiring, the 45th, feedback switch (pMOS), reverse signal by output switching signal STB is connected, disconnect, the 46th, revise and select voltage generation circuit input wiring, the input of the differential amplifier 44 in the voltage generation circuit 34 is selected in the interior detection of unit 31-1 that connects each output circuit with switch 43 (pMOS) and correction, the 47th, power lead, non-selector switch 42 (nMOS) in the unit of each output circuit 31-1 provides non-selection voltage VGL, the 48th, revise to select voltage generation circuit output wiring, connect the selector switch 41 (pMOS) in the unit 31-1 of each output circuit and revise the output of selecting the interior differential amplifier 44 of voltage generation circuit 34.

Here, STB descends when the output switching signal, when its reverse signal rises, pMOS feedback switch 45 disconnects, and, to the capable strobe pulse of selecting the line output low-voltage, select the non-selector switch 42 of nMOS of row to disconnect from level shifter 32, pMOS selector switch 41 and pMOS detect with switch 43 and connect, and the output voltage Gn of output circuit rises to from non-selection voltage and selects voltage VGH.

Under steady state (SS), differential amplifier 44 output is revised and is selected voltage VO, makes to flow through and row selection voltage VGH when not revising equates from no current in the input voltage VX of output circuit unit 31-1 and the row wiring.

At this moment, flow through because pMOS detects with no current in the switch 43, the output voltage Gn of output circuit unit 31-1 equates with input voltage VX.Promptly, the output voltage Gn of output circuit unit 31-1 always selects voltage VGH to equate with row.

Next, STB rises when the output switching signal, when its reverse signal descends, pMOS feedback switch 45 is connected, and, select the capable strobe pulse of row to become high voltage, select the pMOS selector switch 41 of row and pMOS detection to disconnect with switch 43, nMOS is non-, and selector switch 42 is connected, and the output voltage Gn of output circuit unit 31-1 drops to non-selection voltage from selecting voltage VGH.

At this moment, pMOS feedback switch 45 is connected in pMOS selector switch 41 with during pMOS detects the non-selection that disconnects with switch 43.As a result, can prevent from when switch selecting row, to cut off backfeed loop and the output instability that causes differential amplifier 44.

Fig. 5 represents the data driver in the horizontal scan period and the output timing of scanner driver.

In Fig. 5, the output of data driver is synchronously switched with the rising of output switching signal STB.Behind the data driver output delay time of process by the output impedance decision of resistance, electric capacity and the data driver of column wiring, select the output of line scanning driver and the decline of exporting switching signal STB synchronously to be changed to selection voltage VGH from non-selection voltage VGL.

In the moment that a horizontal scan period finishes, select the output of line scanning driver to be changed to non-selection voltage VGL from selecting voltage VGH, and, the output of switch data driver.Flow through in row wiring under the situation of electric current, in order to prevent to produce voltage drop, set row wiring resistance lower, the row wiring time constant is littler than column wiring time constant.

In the sequential of present embodiment, fluorescent lifetime is by the output time decision to the scanner driver of the little row wiring output signal of wiring time constant.As a result, can reduce the inhomogeneous of the brightness that causes by wiring delay.

In the present invention, revise the selection voltage of scanner driver output circuit input to the left and right, make the voltage drop of the scanner driver output point when selecting be respectively zero, scanner driver output point voltage is always constant selection voltage VGH, and irrelevant with video data.

Fig. 6 illustrates the row wiring voltage drop of this moment and the figure of data driver output voltage modified value.

In Fig. 6, the 3rd, the mim type electronic emission element, r is the sweep trace resistance of each pixel, Ro is that the scanner driver output circuit is connected resistance, im is the diode current of m pixel, iRm is the composition that flows into from the right in the diode current of m pixel, iLm is the composition that flows into from the left side in the diode current of m pixel, Vm is the row wiring voltage drop that produces on m pixel, Im is from the electric current of m pixel stream to m+1 pixel, VVL is the selection voltage modified value to the input of left end scanner driver output circuit, and VVR selects voltage to the correction of right-hand member scanner driver output circuit input.

For the diode current im that flows to each pixel that makes mim type electronic emission element 3 is a predetermined value, export to the data driver output of m pixel, the voltage of the row wiring voltage drop Vm that produces has been revised in output on m pixel, the scanner driver output circuit is imported the voltage of having revised modified value VVL, VVR respectively to the left and right, makes the voltage of scanner driver output point reduce to zero.

The row wiring voltage drop Vm that produces on m pixel tries to achieve as follows.Import modified value VVL, VVR respectively to the scanner driver output circuit, make that the falling quantity of voltages of scanner driver output point is zero, left and right sides scanner driver output point becomes the virtual earth point.

The diode current im of m pixel is become to be grouped into 2 of iRm by the iLm that the sweep circuit from both sides flows into.Be located at diode current and only flow through under the situation of m pixel, the voltage that produces on m pixel is reduced to vm, because the voltage drop of the earth point at two ends is equated, following formula (1) is set up.

vm＝-(m-1)riLm＝-(N-m)riRm………(1)

Consider iRm=im-iLm, ask iLm, can obtain following formula (2).

$\mathrm{iLm}=\frac{N-m}{N-1}\mathrm{im}---\left(2\right)$

In addition, ask iRm, can obtain following formula (3).

$\mathrm{iRm}=\frac{m-1}{N-1}\mathrm{im}---\left(3\right)$

According to superposition theorem, shown in (4), flow to the electric current I N of N pixel of right-hand member from earth point, equal to flow into from the right among the diode current im of m pixel component i Rm's and.

$\mathrm{IN}=\underset{j=1}{\overset{N}{\mathrm{\Σ}}}\mathrm{iRj}=\underset{j=1}{\overset{N}{\mathrm{\Σ}}}\frac{j-1}{N-1}\mathrm{ij}---\left(4\right)$

Because the electric current conservation, therefore from the electric current I m-1 of m-1 pixel stream to m pixel, can be by trying to achieve the Calais mutually with the diode current im of m pixel from the electric current I m of m pixel stream to m+1 pixel.Such relation is all set up any m value, and the direction of considering IN is opposite with other, so following formula (5) is set up.

Im-1＝Im+im

$\mathrm{Im}-1=-\mathrm{IN}+\underset{j=m}{\overset{N}{\mathrm{\Σ}}}\mathrm{ij}---\left(5\right)$

In addition, the voltage drop Vm-1 that produces on m-1 pixel can multiply by the resistance value r of each pixel with electric current I m-1 and voltage drop and Vm addition between the neighbor that obtains tried to achieve.Such relation is all set up any m value, considers that N the voltage drop VN on the pixel is always zero, and then following formula (6) is set up.

Vm-1＝Vm+rIm-1

$\mathrm{Vm}-1=r\underset{j=m}{\overset{N}{\mathrm{\Σ}}}\mathrm{Ij}-1---\left(6\right)$

As mentioned above, by being initial value calculating formula (5), (6) successively, can calculate the voltage drop that on m pixel, produces with the IN shown in the formula (4).In order to flow through predetermined diode current, can only revise this value to the data driver output voltage.

Fig. 7 represents the detailed structure of voltage drop correction circuit (1).Voltage drop correction circuit (1) is arranged in the display controller 8 of Fig. 1, video data D0, D1, D2 to modulation circuit 5 outputs 3 output n positions.The other parts of display controller 8, from the outside picture signal that receives of display device, video data D0, D1, D2 to voltage drop correction circuit (1) the output 3 output n positions corresponding with red, green, blue are to modulation circuit 5 and sweep circuit 6-1,6-2 output control signal.

In Fig. 7, the 71st, contrary γ handling part, the 72nd, parallel/series (P/S) change-over circuit, according to the arrangement conversion on the display board 4 video data D0, D1, the D2 corresponding with red, green, blue, the 73rd, line storage, maintenance has been converted to the video data of serial data, and the 74th, be used for revising the adding circuit of data and video data addition, the 75th, series connection/parallel connection (S/P) change-over circuit is converted to video data D0, D1, the D2 corresponding with red, green, blue with revised video data.

The 76th, the data current change-over circuit, form by the conversion table (table) that video data is converted to diode current, 78-1～78-7 calculates to revise the correction voltage computing unit that voltage is used, and the 77th, will revise voltage transitions for revising the voltage data change-over circuit that data are used.

78-1 is the line storage that keeps the diode electrically flow valuve ij of each pixel, 78-2 is the IN counting circuit, diode electrically flow valuve ij and multiplication and addition successively with each pixel, flow to the electric current I N of N pixel of right-hand member from earth point shown in the calculating formula (4), 78-3 is the electric current I N latch cicuit that keeps the electric current I N calculate, 78-4 is a current i j adding circuit, with the diode current ij of each pixel among the line storage 78-1 since N addition successively, 78-5 is an electric current I m-1 counting circuit, from current i j adding circuit 78-4 carry out deduct the electric current I N that electric current I N latch cicuit 78-3 is kept the resulting value of additive operation, ask shown in the formula (5) from the electric current I m-1 of m-1 pixel stream to m pixel, 78-6 is an electric current I j adding circuit, individual since N with electric current I j addition successively, 78-7 is the Vm-1 counting circuit, with electric current I j adding circuit 78-6 carry out the resulting resulting value addition of sweep trace resistance r with each pixel on duty of additive operation, ask the voltage drop Vm-1 that on m-1 pixel, produces shown in the formula (6).

Be imported into video data D0, D1, the D2 of 3 output n positions voltage drop correction circuit (1) shown in Figure 7, corresponding with red, green, blue, carry out contrary γ correction by contrary γ handling part 71 based on the driving voltage of display board 4 and the relation of the characteristics of luminescence, then, by parallel/series change-over circuit 72 be converted to display board 4 on the corresponding serial data of arrangement, writing line storer 73.

Meanwhile, the serial data after the conversion is imported into data current converter section 76, is converted to diode current ij, then, is input to the correction voltage computing unit of being made up of 78-1～78-7, calculates and revises voltage.Diode current ij is remained among the line storage 78-1 successively.

On the other hand, in IN counting circuit 78-2, with the product of diode current ij and coefficient and additive operation resulting value addition successively till the last pixel, flow to the electric current I N of N pixel of right-hand member from earth point shown in the calculating formula (4), the value long-pending and finish time of N pixel is maintained among the electric current I N latch cicuit 78-3.

Next horizontal period is come then, and reads video data successively since N pixel synchronously read the voltage drop of revising usefulness from line storage 73, and additive operation is carried out in the voltage drop of revising usefulness.Calculate the voltage drop Vm-1 that on m-1 pixel, produces as follows.

From line storage 78-1, read m diode current im, with remain on diode current in the current i j adding circuit 78-4 from N pixel to m+1 pixel and addition.

From the resulting value of this additive operation, deduct the electric current I N that electric current I N latch cicuit 78-3 is kept by electric current I m-1 counting circuit 78-5, shown in the calculating formula (5) from the electric current I m-1 of m-1 pixel stream to m pixel.

With electric current I m-1 and the electric current from electric current-IN-1 to electric current I m and the addition that are kept in electric current I j adding circuit 78-6, above-mentioned electric current-IN-1 is from N the pixel of N-1 pixel stream to right-hand member, above-mentioned electric current I m from m pixel stream to m+1 pixel.

By Vm-1 counting circuit 78-1 the sweep trace resistance r of the resulting value of this additive operation and each pixel is multiplied each other, obtain the voltage drop Vm-1 that on m-1 pixel, produces shown in the formula (6).

This voltage drop Vm-1 is converted to the correction data by voltage data change-over circuit 77, the video data addition that itself and line storage 73 is kept by adding circuit 74.Then, revised video data is converted to video data D0, D1, the D2 corresponding with red, green, blue by series connection/parallel switching circuit 75.

In the present embodiment, the output voltage Gn of the output circuit 31 of scanner driver, detect with switch 43 with to revising the input that the input wiring 46 of selecting voltage generation circuit 34 is transported to differential amplifier 44 by pMOS, row in differential amplifier 44 when not revising selects voltage VGH to compare, revise the output of differential amplifier 44, output to pMOS selector switch 41 by output wiring 48.

Because the input impedance height of differential amplifier 44, so import wiring 46 and detect with not flowing through steady current in the switch 43, therefore, the 1st input voltage of differential amplifier 44 equates with sweep circuit output point voltage.

The result, can revise the output voltage of differential amplifier 44, make the row of output point voltage when not revising of sweep circuit select voltage VGH to equate, and have nothing to do with falling quantity of voltages that resistance by the electric current that flows into row wiring, output wiring 48 and pMOS selector switch 41 produces.Therefore, can connect the voltage drop that resistance produces by the output of electric current that flows into row wiring and sweep circuit with the high precision correction.

In addition, the source voltage of pMOS selector switch 41 can be revised by the output of differential amplifier 44, therefore, can reduce the variation of gate source voltage across poles, can reduce to connect changes in resistance.

On the other hand, pMOS feedback switch 45 is connected in pMOS selector switch 41 with during pMOS detects the non-selection that disconnects with switch 43.As a result, can prevent from when switch selecting row, to cut off backfeed loop and the output instability that causes differential amplifier 44.

[embodiment 2]

In the embodiment 1 of above explanation, such situation is arranged, promptly, the output voltage Gn of output circuit rises to from non-selection voltage VGL and produce overshoot when selecting voltage VGH, be difficult to the High Accuracy Control luminous quantity.

The delay that the connection resistance of pMOS selector switch 41 and the wiring capacitance of row wiring 2 cause, pMOS detect with the input of switch 43 and differential amplifier 44 delay that 46 wiring capacitance causes of connecting up, make the input voltage variation of differential amplifier 44 be later than the output voltage variation, cause this overshoot thus.

In the present embodiment, make the disconnection of pMOS feedback switch 45 be later than the pMOS selector switch 41 of selection row and the connection moment that switch 43 is used in the pMOS detection constantly.

Fig. 8 represents the data driver in the horizontal scan period and the output timing of scanner driver.All identical except the reverse signal of signal S with Fig. 5.The reverse signal of signal S is the pMOS feedback switch control signal that is input to the grid of pMOS feedback switch 45, rather than the reverse signal of output switching signal STB.

With Fig. 3, Fig. 4 this action is described.When output switching signal STB descends, from level shifter 32 to selecting line output row strobe pulse, select the non-selector switch 42 of nMOS of row to disconnect, pMOS selector switch 41 and pMOS detect with switch 43 and connect, and the output voltage Gn of output circuit rises to from non-selection voltage and selects voltage VGH.

At this moment, the reverse signal of signal S shown in Figure 8 is a low-voltage, and pMOS feedback switch 45 is connected, so the output voltage of differential amplifier 44 is identical with the input voltage variation, does not produce delay.Then, the output voltage Gn of output circuit rise to select near the voltage VGH after, when the reverse signal of signal S rose, pMOS feedback switch 45 disconnected.

After this moment, the input voltage variation of differential amplifier 44 is later than output voltage and changes, but because the variation of the output voltage of differential amplifier 44 is little, so can not produce the overshoot of the selection voltage of exporting to row wiring.

In the present embodiment, be later than the pMOS selector switch 41 and the pMOS that select row constantly by the disconnection that makes pMOS feedback switch 45 and detect the connection moment of using switch 43, when rising to selection voltage from non-selection voltage, the output voltage of sweep circuit produces under the situation of initial rapid potential change, the input voltage that differential amplifier 44 can not take place changes and to be later than output voltage and to change this situation, therefore can reduce to export to the overshoot of the selection voltage of row wiring.

[embodiment 3]

In the present embodiment, consider among the embodiment 2 that the resistance R o2 from the output point of scanner driver to the pixel at two ends revises the data driver output voltage.Fig. 9 is the explanation row wiring voltage drop at this moment and the figure of the situation of correction.

In Fig. 9, mark 3, r, Ro, im are identical with Fig. 6, and mark iRm ', iLm ', Vm ', Im ', VVL ', VVR ' are identical with iRm, iLm, Vm, Im, VVL, the VVR of Fig. 6.In addition, Ro2 is the resistance from the scanner driver output point to two end pixels.

The row wiring voltage drop Vm ' that produces on m pixel tries to achieve as follows.Import modified value VVL ', VVR ' respectively to the scanner driver output circuit, make the voltage of scanner driver output point reduce to zero, the scanner driver output point becomes the virtual earth point.

The diode current im of m pixel is become to be grouped into 2 of iRm ' by the iLm ' that the sweep circuit from two ends flows into.Be located at diode current and only flow through under the situation of m pixel, the voltage that produces on m pixel is reduced to vm ', and then the voltage drop to the earth point at two ends equates, so following formula (7) is set up.

vm′＝-{(m-1)r+Ro2}iLm′＝-{(N-m)r+Ro2}iRm′………(7)

Consider iRm '=im '-iLm ', ask iLm ', can obtain following formula (8).

${\mathrm{iLm}}^{\&prime;}=\frac{(N-m)r+\mathrm{Ro}2}{(N-1)r+2\mathrm{<figure-callout\; id="2"\; label="Ro"\; filenames="A20061005747800391.png,A20061005747800441.png"\; state="\{\{state\}\}">Ro</figure-callout>}2}\mathrm{im}---\left(8\right)$

In addition, ask iRm ', can obtain following formula (9).

${\mathrm{iRm}}^{\&prime;}=\frac{(m-1)r+\mathrm{Ro}2}{(N-1)r+2\mathrm{<figure-callout\; id="2"\; label="Ro"\; filenames="A20061005747800391.png,A20061005747800441.png"\; state="\{\{state\}\}">Ro</figure-callout>}2}\mathrm{im}---\left(9\right)$

According to superposition theorem, shown in (10), flow to the electric current I N ' of N pixel of right-hand member from earth point, equal among the diode current im of m pixel from right-hand member flow into component i Rm's ' and.

${\mathrm{IN}}^{\&prime;}=\underset{j=1}{\overset{N}{\mathrm{\&Sigma;}}}\mathrm{iR}{j}^{\&prime;}=\underset{j=1}{\overset{N}{\mathrm{\&Sigma;}}}\frac{(j-1)r+\mathrm{Ro}2}{(N-1)r+2\mathrm{<figure-callout\; id="2"\; label="Ro"\; filenames="A20061005747800391.png,A20061005747800441.png"\; state="\{\{state\}\}">Ro</figure-callout>}2}\mathrm{ij}---\left(10\right)$

N ' multiply by the resistance R o2 that outputs to two end pixels from scanner driver with this electric current I, and the voltage drop VN ' on N pixel can try to achieve according to following formula (11).

VN′＝-Ro2×IN′………(11)

Since the electric current conservation, therefore from the electric current I m-1 ' of m-1 pixel stream to m pixel, can be by adding that to the electric current I m of m+1 pixel the diode current im of m pixel tries to achieve from m pixel stream.

Such relation is all set up any m value, and the direction of considering IN ' is opposite with other, so following formula (12) is set up.

Im-1′＝Im′+im

$\mathrm{Im}-1^{\&prime;}=-I{N}^{\&prime;}+\underset{j=m}{\overset{N}{\mathrm{\&Sigma;}}}\mathrm{ij}---\left(12\right)$

In addition, the voltage drop Vm-1 ' that produces on m-1 pixel can try to achieve by Vm ' being added the voltage drop that electric current I m-1 ' multiply by between the neighbor that the resistance value r of each pixel obtains.

Such relation is all set up any m value, considers that the voltage on N pixel is reduced to VN ', and then following formula (13) is set up.

Vm-1′＝Vm′+rIm-1′

$\mathrm{Vm}-1^{\&prime;}={\mathrm{VN}}^{\&prime;}+r\underset{j=m}{\overset{N}{\mathrm{\&Sigma;}}}\mathrm{Ij}-1^{\&prime;}---\left(13\right)$

As mentioned above, by being initial value calculating formula (12), (13) successively, can calculate the voltage drop Vm ' that on m pixel, produces with IN ', the VN ' shown in formula (10), the formula (11).In order to flow through predetermined diode current, can should be worth the correction of data driver output voltage.

Figure 10 represents the detailed structure of voltage drop correction circuit (2).Voltage drop correction circuit (2) is arranged in the display controller 8 of Fig. 1, video data D0, D1, D2 to modulation circuit 5 outputs 3 output n positions.

The other parts of display controller 8, from the outside picture signal that receives of display device, video data D0, D1, D2 to voltage drop correction circuit (2) the output 3 output n positions corresponding with red, green, blue, and, to modulation circuit 5 and sweep circuit 6-1,6-2 output control signal.

In Figure 10, mark 71,72,73,74,75,76,77 is identical with Fig. 7, and 10-1～10-9 is used to calculate the correction voltage computing unit of revising voltage.

10-1,10-3,10-6,10-7,10-8 respectively with the 78-1 of Fig. 7,78-3,78-4,78-5,78-6 is identical, 10-2 is an IN ' counting circuit, diode electrically flow valuve ij and multiplication and addition successively with each pixel, flow to the electric current I N ' of N pixel of right-hand member from earth point shown in the calculating formula (10), 10-4 is a voltage drop VN ' counting circuit, with above-mentioned electric current I N ' and multiplication, ask the voltage drop VN ' on N pixel shown in the formula (11), 10-5 is the voltage drop VN ' latch cicuit that keeps the voltage drop VN ' calculate, 10-9 is a Vm-1 ' counting circuit, electric current I j adding circuit 10-8 carried out the resulting resulting value of sweep trace resistance r with each pixel on duty of additive operation, with the voltage drop VN ' addition that voltage drop VN ' latch cicuit 10-5 is kept, ask the voltage drop Vm-1 ' that on m-1 pixel, produces shown in the formula (13).

In the voltage drop correction circuit (2) of Figure 10, carry out the correction of the video data identical with Fig. 7.Video data D0, D1, the D2 of the 3 output n positions of being imported corresponding with red, green, blue, carry out contrary γ correction by contrary γ handling part 71 based on the driving voltage of display board 4 and the relation of the characteristics of luminescence, then, by parallel/series change-over circuit 72 be converted to display board 4 on the corresponding serial data of arrangement, and writing line storer 73.

Meanwhile, serial data after the conversion is imported into data current converter section 76, be converted to diode current ij, then, be input to the correction voltage computing unit of forming by 10-1～10-9, voltage drop Vm-1 by formula (13) calculates is converted into the correction data in voltage data change-over circuit 77, the video data addition that itself and line storage 73 is kept by adding circuit 74.

Then, revised video data is converted to video data D0, D1, the D2 corresponding with red, green, blue by series connection/parallel switching circuit 75.

In the present embodiment, consider that the resistance R o2 of the pixel from the scanner driver output point to two ends revises the output voltage of data driver, can carry out high-precision correction thus.

[embodiment 4]

Figure 11 is another one-piece construction figure of the present invention (2).Picture segmentation is become piece up and down, at the display image simultaneously of piece up and down.

In Figure 11, mark 2,4,7,9,10,11 is identical with Fig. 1, and 111-1 and 111-2 are the central divided column wirings at display board 4, and 115-1,115-2 are respectively the modulation circuits of column wiring output modulation signal up and down.116-11,116-12 are that the sweep circuit that the row on picture top is selected is carried out in the both sides that are configured in display board 4, and 116-21,116-22 are that the sweep circuit that the row of picture bottom is selected is carried out in the both sides that are configured in display board 4.

Drive power supply 7 provides high power supply voltage VGHH, non-selection voltage VGL, logical circuit voltage vcc to sweep circuit 116-11,116-12,116-21,116-22, provides maximum luminous voltage VEL, non-luminous voltage VEH, high power supply voltage VGHM, logical circuit voltage vcc to modulation circuit 115-1,115-2 and display controller 118.

Display controller 118 is to sweep circuit 116-11,116-12,116-21,116-22 output vertical clock signal VCLK, beginning pulse VIO, output switching signal STB, exports horizontal clock signal HCLK, beginning pulse HIO, output switching signal STB, corresponding with red, green, blue 3 to modulation circuit 115-1,115-2 and exports video data D0, D1, D2, the reference voltage V0～VM of n positions.

In these control signals, the signal except reference voltage V0～VM all has the amplitude of logical circuit with voltage vcc.In addition, video data D0, D1, the D2 with the corresponding 3 output n positions of red, green, blue that are input among modulation circuit 115-1, the 115-2 are different.

Structure and the action of modulation circuit 115-1, the 115-2 of Figure 11 and sweep circuit 116-11,116-12,116-21,116-22, identical with embodiment 1.

In display controller 118, be provided with 2 Fig. 7 or voltage drop correction circuit shown in Figure 10, export video data D0, D1, the D2 of 3 output n positions respectively to modulation circuit 115-1,115-2 simultaneously.Other parts at display controller 118 are provided with frame memory, reception is from the picture signal of display device outside, to voltage drop correction circuit output corresponding with piece up and down and with red, green, blue corresponding 3 export video data D0, D1, the D2 of n positions, export control signal to modulation circuit 115-1,115-2 and sweep circuit 116-11,116-12,116-21,116-22.

In the present embodiment, picture segmentation is become piece up and down, at the display image simultaneously of piece up and down.As a result, the demonstration time that can make delegation is original 2 times, so when making brightness identical, it is original 1/2 can making the electric current that flows into row wiring, making the falling quantity of voltages that will revise is original 1/2.

In addition, because column wiring is cut apart,, can make the power that in modulation circuit 115-1 and 115-2, consumes become original 1/2 so that the driving electric capacity of modulation circuit 115-1,115-2 becomes is original 1/2.

In embodiment 1 to embodiment 4, revise and select voltage generation circuit 34 to be arranged in each scanner driver, but also can be arranged in the sweep circuit of each self contained function.Promptly, as shown in Figure 1 under the situation of the both sides of display board 4 configuration sweep circuit 6-1,6-2, also can in each sweep circuit 6-1,6-2, be provided with to revise and select voltage generation circuit.

In addition, as shown in figure 11 picture segmentation is being become piece up and down, simultaneously under the situation of display image, also can in each sweep circuit 116-11,116-12,116-21,116-22, be provided with to revise and select voltage generation circuit at piece up and down.

Resistance R o2 from the scanner driver output point to two end pixels is different owing to former thereby each row that wiring is disposed sometimes, at this moment, and in embodiment 3, with the different Ro2 design factor of every row.Thus, can prevent the picture element deterioration that the difference by the resistance R o2 of the pixel from the scanner driver output point to two ends causes.

In addition, even unlike the display board that has used electronic emission element, flow through electric current in the row wiring, the selection of the row wiring of the display board by sweep circuit of the present invention being used for having many row wirings and many column wirings (for example Japanese kokai publication sho 57-67993 communique put down in writing LCD panel), also can rise to when selecting voltage from non-selection voltage at the output voltage of sweep circuit, making to revise selects voltage ratio to select voltage height, the time constant of dwindling rising.

[embodiment 5]

Figure 12 is another one-piece construction figure of the present invention (3), gives same mark to the position identical with Fig. 1.

Display board 4 is made up of backboard, header board and sidewall (not shown).Fluorescent film 10 comprises red, green, blue 3 primary colors.

Modulation circuit 5 is to column wiring 1 output modulation signal.Selection is gone in the both sides that sweep circuit 6-1,6-2 are configured in display board 4.

Drive power supply 7 provides high power supply voltage VGHH, non-selection voltage VGL, logical circuit voltage vcc to sweep circuit 6-1 and 6-2, provide maximum luminous voltage VEL, non-luminous voltage VEH, logical circuit voltage vcc to modulation circuit 5, provide maximum luminous voltage VEL, high power supply voltage VGHH, logical circuit voltage vcc to display controller 8.

Display controller 8 to sweep circuit 6-1,6-2 output vertical clock signal VCLK, beginning pulse VIO, select during signal VGO, sweep circuit with reference voltage VG0～VGM ', sweep circuit with voltage drop correction data DVR or DVL, and export video data D0, D1, the D2 of n positions with reference voltage V0～VM, corresponding with red, green, blue 3 to the horizontal clock signal HCLK of modulation circuit 5 outputs, beginning pulse HIO, output switching signal STB, demodulation circuit.

In these control signals and the correction data, except sweep circuit all has the amplitude of logical circuit with voltage vcc with reference voltage VG0～VGM ' and modulation circuit with the signal reference voltage V0～VM.

Figure 13 is the structural drawing that constitutes the scanner driver of sweep circuit 6-1,6-2 shown in Figure 12.Sweep circuit is made up of the scanner driver that is connected in series.

In Figure 13, the 33rd, shift register, generation is used at the capable selection signal of each horizontal scan period switched scan successively; The 32nd, level shifter will be the level of high power supply voltage VGHH-non-selection voltage VGL from logical circuit with the level conversion of voltage Vcc-GND from the output of shift register 33; The 31st, the output circuit by the CMOS circuit for reversing is formed corresponding to the output from level shifter 32 of having carried out level shift, is used for and will selects voltage VGH or non-selection voltage VGL to export to each row wiring 2 of display board 4 as output voltage G1～Gn.The 34th, revise and select voltage generation circuit, with reference voltage VG0～VGM ', with voltage drop correction data DVR or DVL, export the selection voltage of having revised VVR or VVL with sweep circuit to output circuit 31 according to m bit scan circuit.VR/L is a signal of determining that the direction of displacement of shift register is used, is fixed as logical circuit with voltage vcc or ground voltage GND.

Here, when a vertical scanning period began, beginning pulse VIO imported as the 1st scanner driver VIO1 (or VIO2) signal, in each horizontal scan period, synchronously be shifted with vertical clock signal VCLK in shift register 33, signal is selected in output successively.

The logic product of signal VGO during selection signal of being exported and the selection, by level shifter 32 level shifts is the level of high power supply voltage VGHH-non-selection voltage VGL, by correction that revise to select voltage generation circuit 34 to be generated the selection voltage of VVR or VVL, be imported into output circuit 31 with reference voltage VG0～VGM ' and m bit scan circuit with voltage drop correction data DVR or DVL according to sweep circuit, as selection row wiring output from voltage VGH to display board 4 that select.

On the other hand, export non-selection voltage VGL to the non-selection row wiring of display board 4.When the end-of-shift in the 1st scanner driver, the voltage of VIO2 (or VIO1) becomes the logical circuit voltage vcc, is input to the VIO1 (or VIO2) of the 2nd scanner driver (not shown), begins the displacement in the 2nd scanner driver.Select all row so successively.Voltage generation circuit 34 is selected in the correction of each scanner driver, can move when VIO1 (or VIO2) imports, when VIO2 (or VIO1) stops action when being input to next scanner driver.

Figure 14 is the sequential chart that data driver is exported and scanner driver is exported in the horizontal scan period, with the synchronously output of switch data driver of output switching signal STB.Behind data driver output delay time, select the output of line scanning driver to be changed to and select voltage VGH from non-selection voltage VGL by the output impedance decision of the resistance of column wiring and electric capacity and data driver.

In the moment that a horizontal scan period finishes, select the output of line scanning driver to be changed to non-selection voltage VGL from selecting voltage VGH, and, the output of switch data driver.Flow through at row wiring under the situation of electric current, in order to prevent to produce voltage drop, row wiring resistance is set lowlyer, and the row wiring time constant is littler than column wiring time constant.

In the sequential of present embodiment, fluorescent lifetime is by the output time decision to the scanner driver of the little row wiring output signal of wiring time constant.As a result, can reduce the inhomogeneous of the brightness that causes by wiring delay.

In the present invention, selection voltage to scanner driver output circuit input is to the left and right revised, make the voltage drop at the scanner driver output point when selecting be respectively zero, scanner driver output point voltage is always constant selection voltage VGH, and irrelevant with video data.

By being initial value calculating formula (5), formula (6) successively with the IN shown in the above-mentioned formula (4), can calculate the voltage drop that on m pixel, produces.In order to flow through predetermined diode current, can should be worth the correction of data driver output voltage.In addition, because the electric current conservation, so flow through electric current I N, I0 respectively in the scanner driver connection resistance R o.Therefore, for the output point that makes scanner driver is the virtual earth point, obtain with following formula (14), (15) to modified value VVR, the VVL of the selection voltage of the scanner driver output circuit of right-hand member and left end input.

VVR＝Ro×IN………(14)

$\mathrm{VVL}=\mathrm{Ro}\&times;I0=\mathrm{Ro}(\underset{j=1}{\overset{N}{\mathrm{\&Sigma;}}}\mathrm{Ij}-1-\mathrm{IN})---\left(15\right)$

Figure 15 represents the detailed structure of voltage drop correction circuit (3).Voltage drop correction circuit (3) is arranged in the display controller 8, and video data D0, D1, D2 to modulation circuit 5 outputs 3 output n positions fall correction data DVR, DVL to sweep circuit 6-1,6-2 output voltage.

The 61st, contrary γ handling part, the 62nd, P/S (parallel connection/polyphone) change-over circuit, according to the arrangement conversion on the display board 4 video data D0, D1, the D2 corresponding with red, green, blue, the 63rd, line storage, keep being converted to the video data of serial data, the 64th, be used for and will revise the adding circuit of data and video data addition, the 65th, S/P (polyphone/parallel connection) change-over circuit is converted to video data D0, D1, the D2 corresponding with red, green, blue with revised video data.

The 66th, data/current converter circuit, form by the conversion table (table) that video data is converted to diode current, 68-1～68-7 and 69-1～69-6 calculate to revise the correction voltage computing unit that voltage is used, and 67-1,67-2 will revise voltage transitions for revising the voltage data change-over circuit that data are used.

68-1 is the line storage that keeps the diode electrically flow valuve ij of each pixel, 68-2 is the IN counting circuit, the diode electrically flow valuve ij and the multiplication of each pixel are also carried out addition successively, flow to the electric current I N of N pixel of right-hand member from earth point shown in the calculating formula (4), 68-3 is the electric current I N latch cicuit that keeps the electric current I N calculate, 68-4 is a current i j adding circuit, the diode current ij of each pixel among the line storage 68-1 is carried out addition successively since N, 68-5 is an electric current I m-1 counting circuit, from current i j adding circuit 68-4 carry out deduct the electric current I N that electric current I N latch cicuit 68-3 is kept the resulting value of additive operation, ask shown in the formula (5) from the electric current I m-1 of m-1 pixel stream to m pixel, 68-6 is an electric current I j adding circuit, individual since N with electric current I j addition successively, 68-7 is the Vm-1 counting circuit, with electric current I j adding circuit 68-6 carry out the resulting resulting value addition of sweep trace resistance r with each pixel on duty of additive operation, ask the voltage drop Vm-1 that on m-1 pixel, produces shown in the formula (6).

In addition, 69-1 is a current i j adding circuit, the diode electrically flow valuve ij of each pixel is added to till N successively, 69-2 is electric current I 0 counting circuit, from the value of current i j adding circuit 69-1, deduct the electric current I N that electric current I N latch cicuit 68-3 is kept, calculating flows to the electric current I 0 of the 1st pixel of left end from earth point, 69-3 is a correction VVL counting circuit, with electric current I 0 and the multiplication that calculates, ask the input voltage modified value VVL shown in the formula (15) to the input of left end scanner driver output circuit, 69-4 is the correction VVL latch cicuit that keeps the correction VVL calculate, 69-5 is a correction VVR counting circuit, electric current I N and multiplication that electric current I N latch cicuit 68-3 is kept, ask the input voltage modified value VVR to right-hand member scanner driver output circuit input shown in the formula (14), 69-6 is the correction VVR latch cicuit that keeps the correction VVR that calculates.

Below, action is described.Be imported into video data D0, D1, the D2 of 3 output n positions voltage drop correction circuit (3), corresponding with red, green, blue, carry out contrary γ correction by contrary γ handling part 61 based on the driving voltage of display board 4 and the relation of the characteristics of luminescence, then, by P/S change-over circuit 62 be converted to display board 4 on the corresponding serial data of arrangement, and writing line storer 63 successively.Meanwhile, serial data is imported into data current converter section 66, is converted to diode current ij, then, is input to and revises voltage computing unit 68-1～68-7 and 69-1～69-6, calculates and revises voltage.

Diode current ij remains among the line storage 68-1 successively.On the other hand, in IN counting circuit 68-2, the addition successively of the resulting value of last pixel is arrived in the product and the additive operation of diode current ij and coefficient, flow to the electric current I N of N pixel of right-hand member from earth point shown in the calculating formula (4), the value long-pending and finish time of N pixel is maintained among the electric current I N latch cicuit 68-3.

In current i j adding circuit 69-1, with diode current ij addition successively, in electric current I 0 counting circuit 69-2, from the value in the moment that the additive operation of N pixel finishes, deduct the electric current I N that electric current I N latch cicuit 68-3 is kept, calculate the electric current I 0 that flows to the 1st pixel of left end from earth point.

In correction VVL counting circuit 69-3,, obtain the input voltage modified value VVL shown in the formula (15), and remain among the correction VVL latch cicuit 69-4 to the input of left end scanner driver output circuit with electric current I 0 and the multiplication that calculates.

In correction VVR counting circuit 69-5, the electric current I N that electric current I N latch cicuit 68-3 is kept multiply by coefficient, obtain the input voltage modified value VVR shown in the formula (14), and remain among the correction VVR latch cicuit 69-6 to the input of right-hand member scanner driver output circuit.

When next horizontal period arrives, and from line storage 63, read video data successively and synchronously read the voltage drop of revising usefulness since N pixel, additive operation is carried out in the voltage drop of correction usefulness.Calculate the voltage drop Vm-1 that on m-1 pixel, produces as follows.

From line storage 68-1, read m diode current im, with its with remain on diode current in the current i j adding circuit 68-4 from N pixel to m+1 pixel and addition.In electric current I m-1 counting circuit 68-5, from the resulting value of this additive operation, deduct the electric current I N that electric current I N latch cicuit 68-3 is kept, calculate shown in the formula (5) from the electric current I m-1 of m-1 pixel stream to m pixel.

With this electric current I m-1 and the electric current from electric current-IN-1 to electric current I m and the addition that in electric current I j adding circuit 68-6, are kept, above-mentioned electric current-IN-1 is from N the pixel of N-1 pixel stream to right-hand member, above-mentioned electric current I m from m pixel stream to m+1 pixel.

The resulting value of this additive operation, the sweep trace resistance r with each pixel in Vm-1 counting circuit 68-7 multiplies each other, and obtains the voltage drop Vm-1 that produces on m-1 pixel shown in the formula (6).Voltage drop Vm-1,67-1 is converted to the correction data by the voltage data change-over circuit, the video data addition that is kept by adding circuit 64 and line storage 63.

Then, revised video data is converted to video data D0, D1, the D2 corresponding with red, green, blue by series connection/parallel switching circuit 65.In addition, to the input voltage modified value VVL of the scanner driver output circuit of left end input with to the input voltage modified value VVR of the scanner driver output circuit input of right-hand member, be converted to by voltage data change-over circuit 67-2 and be output after data DVL or DVR are revised in the m position.

Figure 16 is the detailed structure view that voltage generation circuit 34 is selected in the interior correction of scanner driver shown in Figure 13, the 711st, latch, data DVL or DVR are revised in the m position that remains on each horizontal scan period voltage drop correction circuit (3) output, the 721st, level shifter is the level of high power supply voltage VGHH-non-selection voltage VGL from logical circuit with the level conversion of voltage Vcc-GND with latch output; The 751st, the grayscale voltage generating unit, the sweep circuit reference voltage VG0～VGM ' by display controller 8 outputs produces 2 by electric resistance partial pressure ^mIndividual correction grayscale voltage, the 731st, demoder is revised data DVL or DVR corresponding to the m position of level shifter 721 outputs, from 2 ^mSelect voltage in the individual grayscale voltage, the 741st, by the output circuit that voltage output follower (voltage follower) is formed, be used for selecting voltage VVL or VVR to export to the correction of demoder output and select row.

In addition, sweep circuit reference voltage VG0～VGM ', be will be when do not have revising the voltage of selection voltage to the selection voltage of revising when maximum carry out the voltage that obtains behind the M ' five equilibrium, the divider resistance value that constitutes the resistance of grayscale voltage generating unit 751 equates that all the relation of revising between gray shade scale and the output voltage is linear.

In Figure 16, after each horizontal scan period is revised data DVL or DVR from the m position of voltage drop correction circuit (3) output, is maintained in the latch 711, carry out level shift by level shifter 721, be input in the demoder 731.As a result, select 1 correction grayscale voltage that is generated by grayscale voltage generating unit 751, by output circuit 741 outputs.

Figure 17 is arranged on the generating circuit from reference voltage figure in the display controller shown in Figure 12 8, and the 82nd, resistor ladder, the 81st, be used for the buffer amplifier of each node voltage of output resistance ladder.High power supply voltage VGHH that inputs to scanner driver and the maximum luminous voltage VEL that inputs to data driver have been applied at the two ends of resistor ladder 82.

The resistance ratio of regulation resistor ladder 82, make modulation circuit become the voltage that obtains behind the branch such as M carrying out to the voltage the maximum luminous voltage VEL from non-luminous voltage VEH with reference voltage V0～VM, sweep circuit becomes and will not carry out the voltage that obtains behind the M ' five equilibrium from there being the voltage of selection voltage to the selection voltage of revising when maximum when revising with reference voltage VG0～VGM '.

In the present embodiment, same power supply by high power supply voltage VGHH that inputs to scanner driver and the maximum luminous voltage VEL that inputs to data driver generates modulation circuit reference voltage V0～VM and sweep circuit reference voltage VG0～VGM ' by electric resistance partial pressure, therefore, even the supply voltage value change can guarantee that also modulation circuit is steady state value with reference voltage V0～VM and sweep circuit with the relative value of reference voltage VG0～VGM '.As a result, even the two is revised by modulation circuit and sweep circuit, also can reduce the generation of error.

In the present embodiment, by revising the selection voltage of selecting voltage generation circuit 34 to revise to the input of scanner driver output circuit, make and reduce to zero at the voltage of the scanner driver output point of selecting row, the scanner driver output voltage is always constant selection voltage VGH, and it is irrelevant with video data, and, with modified value correction data driver output voltage, above-mentioned modified value is used to compensate the voltage drop of row wiring each several part, above-mentioned voltage drop is that the falling quantity of voltages with the sweep circuit output point is zero, and is fixed according to display mode.

The result, the data driver output voltage does not comprise the correction of being connected the voltage drop of resistance generation by scanner driver, therefore data driver output voltage amplitude can be reduced, the such effect of correction gray shade scale number that reduces in power consumption, the reduction data driver can be obtained.

In addition, to be arranged on the both sides of display board by the sweep circuit that scanner driver is formed, drive same delegation simultaneously from both sides, and, to revise in each sweep circuit of selecting about voltage generation circuit is arranged on, revise, the voltage of the scanner driver output point of the formation sweep circuit of the selected row wiring of each sweep circuit about making is steady state value and irrelevant with video data.

The result, when sweep circuit is arranged on the both sides of display board, the data driver output voltage does not comprise the correction of being connected the voltage drop of resistance generation by scanner driver yet, therefore data driver output voltage amplitude can be reduced, the such effect of correction gray shade scale number that reduces in power consumption, the reduction data driver can be obtained.

In addition, to flow to from the row wiring of each electronic emission element and flow to the composition stack of each electronic emission element from the sweep circuit output point the diode current of column wiring, ask the total current that flows to the end electronic emission element of row wiring from the sweep circuit output point thus, will be from the sweep circuit output point to m electronic emission element flow to the electric current addition successively of column wiring from row wiring, and from total current, deduct, ask the electric current that between neighbor, flows through, the electric current resistance value with each pixel on duty of addition gained successively neighbor that will be from the sweep circuit output point to m, ask the voltage drop between neighbor, thereby ask the voltage drop on each electronic emission element.

As a result, the long-pending and computing in horizontal scan period just is used to calculate the long-pending and computing of N * N of total current IN.With respect to the long-pending and computing of carrying out N N * N in the existing method, long-pending and computing can be reduced to 1/N significantly.

[embodiment 6]

In the present embodiment, detect scanner driver output voltage V X, VGH compares with preset selection voltage, and the input voltage VO to scanner driver output circuit input is changed, and makes the voltage of output point of scanner driver become preset selection voltage VGH.

Figure 18 is the structural drawing of the scanner driver of present embodiment, gives same mark to the part identical with Figure 13.The 91st, output circuit, be used for according to the shift register output of having carried out level shift, to select voltage VGH or non-selection voltage VGL to export to each row wiring 2 of display board 4 as output voltage G1～Gn, the 94th, revise and select voltage generation circuit, produce to the correction of output circuit 91 inputs and select voltage VO.

Figure 19 represents the output circuit 91 in the scanner driver shown in Figure 180 and revises the detailed structure of selecting voltage generation circuit 94.91-1 is illustrated in the unit of the output circuit of each row setting.The 102nd, the nMOS switch of connection, disconnection non-selection voltage VGL, the 101st, the pMOS switch, connect, disconnect revising and select the correction of voltage generation circuit 94 generations to select voltage VO, the 103rd, detect and use pMOS, will select the output voltage Gn of the output circuit of row to carry as input voltage VX to 94 inputs of correction selection voltage generation circuit.The 104th, differential amplifier, voltage VO revise is selected in output, makes to flow through and row selection voltage VGH when not revising equates from no current in the input voltage VX of output circuit unit 91-1 and the row wiring.

In Figure 18, during similarly from level shifter 32 output row strobe pulses, in Figure 19, select the nMOS switch 102 of row to disconnect with Figure 13, pMOS switch 101 is connected, and output voltage Gn rises to from non-selection voltage VGL and selects voltage VGH.

Here, the differential amplifier 104 under steady state (SS), voltage VO revise is selected in output, makes to flow through and row selection voltage VGH when not revising equates from no current in the input voltage VX of output circuit unit 91-1 and the row wiring.At this moment, owing to do not flow through electric current in the pMOS switch 103, so output voltage Gn equates with input voltage VX.Promptly, output voltage Gn always selects voltage VGH to equate with row.

Figure 20 is arranged on the unit 91-1 of each each output circuit of going and revises the wiring layout drawing of selecting between the voltage generation circuit 94, the 111st, differential amplifier output wiring, the interior pMOS switch 101 and the output of revising the differential amplifier 104 in the selection voltage generation circuit 94 of unit 91-1 that connects each output circuit, the 112nd, power lead, nMOS switch 102 in the unit of each output circuit 91-1 provides non-selection voltage VGL, the 113rd, differential amplifier input wiring connects detection in the unit 91-1 of each output circuit with pMOS 103 with revise the input of selecting the differential amplifier 104 in the voltage generation circuit 94.In the present embodiment, configuration power lead 112 between differential amplifier output wiring 111 and differential amplifier input wiring 113 can prevent to produce stray capacitance between the amplifier input and output.

Figure 21 is the detailed structure view of the voltage drop correction circuit (4) of present embodiment, gives identical mark to position same as the previously described embodiments.

This voltage drop correction circuit (4) can carry out the correction of the video data identical with Figure 15.Video data D0, D1, the D2 of the 3 output n positions of being imported corresponding with red, green, blue, carry out contrary γ correction by contrary γ handling part 61 based on the driving voltage of display board 4 and the relation of the characteristics of luminescence, then, by P/S change-over circuit 62 be converted to display board 4 on the corresponding serial data of arrangement, and writing line storer 63.Meanwhile, the serial data of having carried out the P/S conversion is imported into data current converter section 66, be converted to diode current ij, then, be input to the correction voltage computing unit of forming by 68-1～68-7, the voltage drop Vm-1 that is calculated by formula (6) is converted to the correction data by voltage/data converting circuit 67-1, in adding circuit 64 with remain on video data addition in the line storage 63.Then, revised video data converts video data D0, D1, the D2 corresponding with red, green, blue to by S/P change-over circuit 65.

In the present embodiment, by revising the output voltage V X that selects voltage generation circuit 94 to detect scanner driver output circuit 91-1, select voltage VGH to compare with predetermined row, input voltage VO to scanner driver output circuit 91-1 input is changed, thus, the output voltage Gn of scanner driver output circuit 91-1 and video data are irrelevant, and always the row when not revising selects voltage VGH to equate.The result, similarly to Example 1, the correction of data driver output voltage does not comprise the correction of being connected the voltage drop of resistance generation by scanner driver, therefore can reduce the data driver output voltage, so, can obtain the such effect of correction gray shade scale number that reduces in power consumption, the reduction data driver.

In addition, because the input impedance height of differential amplifier 104, so can not flow through steady current in the pMOS switch 103, therefore, the output voltage Gn of scanner driver output circuit 91-1 becomes with the input voltage VX of differential amplifier and equates, also can revise voltage drop, above-mentioned voltage drop is by causing to the cloth line resistance of the pMOS switch 101 of scanner driver output circuit 91-1 from constituting differential amplifier 104 that revise to select voltage generation circuit 94.In addition, also can have such effect: even the connection resistance of scanner driver output circuit 91-1 all has difference when each output, output voltage Gn also can always select voltage VGH to equate with row.On the other hand, compare, revise and select voltage generation circuit 94 only to constitute by differential amplifier with embodiment 1, and, in voltage drop correction circuit (4), do not need to be used to calculate the circuit of scanner driver output voltage modified value, hardware is oversimplified.

[embodiment 7]

Figure 22 represents the detailed structure of voltage drop correction circuit (5).This voltage drop correction circuit (5) is arranged in the display controller 8 of Figure 12, video data D0, D1, D2 to modulation circuit 5 outputs 3 output n positions.The other parts of display controller 8, from the outside picture signal that receives of display device, video data D0, D1, D2 to voltage drop correction circuit (5) the output 3 output n positions corresponding with red, green, blue, and, to modulation circuit 5 and sweep circuit 6-1,6-2 output control signal.

In Figure 14, give identical mark to position same as the previously described embodiments.14-1～14-9 is used to calculate the correction voltage computing unit of revising voltage.14-1,14-3,14-6,14-7,14-8 68-1,68-3,68-4,68-5, the 68-6 with Figure 15, Figure 21 respectively are identical.

14-2 is an IN ' counting circuit, diode electrically flow valuve ij and multiplication and addition successively with each pixel, flow to the electric current I N ' of N pixel of right-hand member from earth point shown in the calculating formula (12), 14-4 is a voltage drop VN ' counting circuit, with above-mentioned electric current I N ' and multiplication, ask the voltage drop VN ' on N pixel shown in the formula (11), 14-5 is the voltage drop VN ' latch cicuit that keeps the voltage drop VN ' calculate, 14-9 is a Vm-1 ' counting circuit, electric current I j adding circuit 14-8 carried out the resulting resulting value of sweep trace resistance r with each pixel on duty of additive operation, with the voltage drop VN ' addition that voltage drop VN ' latch cicuit 14-5 is kept, ask the voltage drop Vm-1 ' that on m-1 pixel, produces shown in the formula (13).

In this voltage drop correction circuit (5), carry out the correction of the video data identical with Figure 15.Video data D0, D1, the D2 of the 3 output n positions of being imported corresponding with red, green, blue, carry out contrary γ correction by contrary γ handling part 61 based on the driving voltage of display board 4 and the relation of the characteristics of luminescence, then, by P/S change-over circuit 62 be converted to display board 4 on the corresponding serial data of arrangement, and writing line storer 63.Meanwhile, the serial data of having carried out after P/S changes is imported into data current converter section 66, be converted to diode current ij, then, be input to the correction voltage computing unit of forming by 14-1～14-9, the voltage drop Vm-1 that is calculated by formula (13) converts the correction data to by voltage data change-over circuit 67-1, the video data addition that is kept by adding circuit 64 and line storage 63.Then, revised video data is converted to video data D0, D1, the D2 corresponding with red, green, blue by S/P change-over circuit 65.

In the present embodiment, the output voltage by the resistance R o2 that considers the pixel from the scanner driver output point to two ends revises data driver can carry out high-precision correction.

[embodiment 8]

Figure 23 is another one-piece construction figure of the present invention, and picture segmentation is become piece up and down, at the display image simultaneously of piece up and down.

151-1 and 151-2 are the central divided column wirings at display board 4,155-1,155-2 are respectively the modulation circuits of column wiring output modulation signal up and down, 156-11,156-12 are that the sweep circuit that the row on picture top is selected is carried out in the both sides that are configured in display board 4, and 156-21,156-22 are that the sweep circuit that the row of picture bottom is selected is carried out in the both sides that are configured in display board 4.

Drive power supply 7 provides high power supply voltage VGHH, non-selection voltage VGL, logical circuit voltage vcc to sweep circuit 156-11,156-12,156-21,156-22, provides maximum luminous voltage VEL, non-luminous voltage VEH, logical circuit voltage vcc to modulation circuit 155-1,155-2 and display controller 158.

Display controller 158 to sweep circuit 156-11,156-12,156-21,156-22 output vertical clock signal VCLK, beginning pulse VIO, select during signal VGO, export horizontal clock signal HCLK, beginning pulse HIO, output switching signal STB, corresponding with red, green, blue 3 to modulation circuit 155-1,155-2 and export video data D0, D1, D2, the reference voltage V0～VM of n positions.In these control signals, the signal except reference voltage V0～VM all has the amplitude of logical circuit with voltage vcc.In addition, video data D0, D1, the D2 with the corresponding 3 output n positions of red, green, blue that are input among modulation circuit 155-1, the 155-2 are different.

Structure and the action of modulation circuit 155-1,155-2 and sweep circuit 156-11,156-12,156-21,156-22, identical with embodiment 2.In display controller 158, be provided with 2 voltage drop correction circuits, export video data D0, D1, the D2 of 3 output n positions respectively to modulation circuit 155-1,155-2 simultaneously.Other parts at display controller 158 are provided with frame memory, reception is from the picture signal of display device outside, to voltage drop correction circuit output corresponding with piece up and down and with red, green, blue corresponding 3 export video data D0, D1, the D2 of n positions, export control signal to modulation circuit 155-1,155-2 and sweep circuit 156-11,156-12,156-21,156-22.

In the present embodiment, picture segmentation is become piece up and down, at the display image simultaneously of piece up and down.As a result, the demonstration time that can make delegation is original 2 times, so when brightness was identical, it was original 1/2 can making the electric current that flows into row wiring, making the falling quantity of voltages that will revise is original 1/2.In addition, because cut apart column wiring,, can make the power that in modulation circuit 155-1 and 155-2, consumes become 1/2 so the driving electric capacity of modulation circuit 155-1,155-2 becomes 1/2.

More than, revise and select voltage generation circuit 34 or revise selection voltage generation circuit 94 to be arranged in each scanner driver, but also can be arranged in the sweep circuit of each self contained function.Promptly, under the situation of the both sides of display board 4 configuration sweep circuit 6-1,6-2, also can in each sweep circuit 6-1,6-2, all be provided with to revise and select voltage generation circuit.In addition, picture segmentation is being become piece up and down, simultaneously under the situation of display image, also can in each sweep circuit 156-11,156-12,156-21,156-22, all be provided with to revise and select voltage generation circuit at piece up and down.

In addition, considered that the resistance R o2 from the output point of scanner driver to the pixel at two ends revises the data driver output voltage, but in embodiment 5, also can carry out the correction of same data driver output voltage.

The resistance R o2 of the pixel from the scanner driver output point to two ends is sometimes because former thereby each row of wiring configuration is different.At this moment, with the different Ro2 design factor of every row.Thus, can prevent the picture element deterioration that the difference by the resistance R o2 of the pixel from the scanner driver output point to two ends causes.

Claims (12)

1. display device comprises: display board has the backboard of a plurality of electronic emission elements that comprise many row wirings, many column wirings and be connected with these wirings and has the header board that is applied in anode voltage; Carry out the sweep circuit of the selection of above line wiring; And above-mentioned column wiring applied the modulation circuit of modulation voltage, this display device is characterised in that:

Above-mentioned sweep circuit,

Have in each provisional capital: non-selector switch, be arranged between sweep circuit output point and the power lead, connect, disconnect non-selection voltage; Selector switch is arranged on sweep circuit output point and correction and selects between the voltage generation circuit output wiring, and connection, disconnection correction are selected voltage; And detect and use switch, be arranged on sweep circuit output point and correction and select to detect the output voltage of selection row between the voltage generation circuit input wiring;

Every many row wirings have one to be revised and selects voltage generation circuit, it comprise the 1st input with revise select that voltage generation circuit input wiring is connected, the 2nd input be applied in row and select that the wiring of voltage is connected, output is exported the differential amplifier that connects up and be connected with above-mentioned correction selection voltage generation circuit.

2. display device according to claim 1 is characterized in that:

Voltage generation circuit is selected in above-mentioned correction, has feedback switch between the input and output of above-mentioned differential amplifier.

3. display device according to claim 2 is characterized in that:

Make the disconnection of above-mentioned feedback switch be later than above-mentioned selector switch and above-mentioned detection constantly constantly with the connection of switch.

4. display device comprises: display board has the backboard of a plurality of electronic emission elements that comprise many row wirings, many column wirings and be connected with these wirings and has the header board that is applied in anode voltage; Carry out the sweep circuit of the selection of above line wiring; And above-mentioned column wiring applied the modulation circuit of modulation voltage, this display device is characterised in that:

Above-mentioned sweep circuit has revise to select voltage generation circuit, and this corrections selects voltage generation circuit to revise, and makes that the voltage of the sweep circuit output point of selecting row is steady state value and haveing nothing to do with video data,

The modified value that above-mentioned modulation circuit, output utilize the voltage drop of the each several part of compensation above line wiring to use has been carried out the modulation voltage of revising, and above-mentioned voltage drop is that the falling quantity of voltages with the sweep circuit output point is zero, and is fixed according to display mode.

5. display device according to claim 4 is characterized in that:

By the composition that flows to each electronic emission element from above-mentioned sweep circuit output point is superposeed, ask the total current that flows to the end electronic emission element of above line wiring from above-mentioned sweep circuit output point;

From above-mentioned total current, deduct the electric current that flows to column wiring from row wiring from above-mentioned sweep circuit output point to m electronic emission element addition successively and the value that obtains is asked the electric current that flows through between neighbor;

The resistance value with each pixel on duty that will obtain electric current the neighbor individual from above-mentioned sweep circuit output point to m addition is successively asked voltage drop between neighbor;

Ask the voltage drop on each electronic emission element thus.

6. display device according to claim 4 is characterized in that:

The modified value of above-mentioned modulation voltage, the voltage drop that compensation is caused by the resistance between electronic emission element that is configured in the row wiring end and the above-mentioned sweep circuit output point.

7. display device according to claim 6 is characterized in that:

The value of above-mentioned resistance is pressed every row and difference.

8. display device comprises: display board has the backboard of a plurality of electronic emission elements that comprise many row wirings, many column wirings and be connected with these wirings; And have the header board that is applied in anode voltage; Carry out the sweep circuit of the selection of above line wiring; And above-mentioned column wiring applied the modulation circuit of modulation voltage, this display device is characterised in that:

Above-mentioned sweep circuit is arranged on the both sides of a row wiring, has revise to select voltage generation circuit, and this corrections selection voltage generation circuit is revised, and makes that the voltage of sweep circuit output point of selected row wiring is predetermined value,

The output of above-mentioned modulation circuit utilize modified value correction that the voltage drop of the each several part of compensation above line wiring uses modulation voltage, above-mentioned voltage drop is fixed according to display mode.

9. display device according to claim 8 is characterized in that:

By the composition that flows to each electronic emission element from above-mentioned sweep circuit output point is superposeed, ask the total current that flows to the end electronic emission element of above line wiring from above-mentioned sweep circuit output point;

From above-mentioned total current, deduct the electric current that flows to column wiring from row wiring from above-mentioned sweep circuit output point to m electronic emission element addition successively and the value that obtains is asked the electric current that flows through between neighbor;

The resistance value with each pixel on duty that will obtain electric current the neighbor individual from above-mentioned sweep circuit output point to m addition is successively asked voltage drop between neighbor;

Ask the voltage drop on each electronic emission element thus.

10. display device according to claim 8 is characterized in that:

The modified value of above-mentioned modulation voltage, the voltage drop that compensation is caused by the resistance between electronic emission element that is configured in the row wiring end and the above-mentioned sweep circuit output point.

11. display device according to claim 10 is characterized in that:

The value of above-mentioned resistance is pressed every row and difference.

12. a display device comprises: have many row wirings and many column wirings display board, carry out above line wiring selection sweep circuit and above-mentioned column wiring applied the modulation circuit of modulation voltage, this display device is characterised in that:

Above-mentioned sweep circuit,

Have in each provisional capital: non-selector switch, be arranged between sweep circuit output point and the power lead, connect, disconnect non-selection voltage; Selector switch is arranged on sweep circuit output point and correction and selects between the voltage generation circuit output wiring, and connection, disconnection correction are selected voltage; And detect and use switch, be arranged on sweep circuit output point and correction and select to detect the output voltage of selection row between the voltage generation circuit input wiring,

Every many row wirings have one to be revised and selects voltage generation circuit, it comprise the 1st input with revise select that voltage generation circuit input wiring is connected, the 2nd input be applied in row and select that the wiring of voltage is connected, output is exported the differential amplifier that connects up and be connected with above-mentioned correction selection voltage generation circuit.

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