CN105224004A - A kind of method and current detecting chip adjusting voltage - Google Patents
A kind of method and current detecting chip adjusting voltage Download PDFInfo
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- CN105224004A CN105224004A CN201510609652.XA CN201510609652A CN105224004A CN 105224004 A CN105224004 A CN 105224004A CN 201510609652 A CN201510609652 A CN 201510609652A CN 105224004 A CN105224004 A CN 105224004A
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Abstract
The embodiment of the present invention relates to low temp compensating field, particularly a kind of method and current detecting chip adjusting voltage, and in order to solve because environment temperature is too low in prior art, terminal presentation facility there will be the problem starting exception.In the embodiment of the present invention, current detecting chip is determined to transform magnitude of voltage corresponding to the current value that obtains by the drain current of panel itself pixel; If magnitude of voltage is not in preset range, then current detecting chip adjustment magnitude of voltage, to make the magnitude of voltage after adjustment in preset range; Magnitude of voltage after adjustment is converted into voltage signal and exports by current detecting chip.Because the embodiment of the present invention is by judging that whether this magnitude of voltage is in preset range, if not in preset range, then current detecting chip adjusts this magnitude of voltage to preset range by program, ensures that can the drain current of described panel itself pixel make terminal presentation facility normally start.
Description
Technical field
The present invention relates to low temp compensating field, particularly a kind of method and current detecting chip adjusting voltage.
Background technology
At present, liquid crystal technology has been widely used in the display screen of electronic product, along with electronic product is constantly upgraded, also more and more higher to the requirement of the display screen of electronic product.
Along with user to the display device of terminal in Flicker (flicker), the requirement of Crosstalk (crosstalk) is more and more higher, the display device of liquid crystal technology is adopted also progressively to improve, display device PPI (the Pixelsperinch of terminal, the number of pixels that per inch has) constantly promote, Active (enlivening) area constantly reduces, thus the On current scope of high resolution display terminal constantly reduces.Especially in the environment that temperature is lower, the pixel current of display panel inside does not meet On current scope, the display device of part terminal is caused normally to start, thus occur functional bad, once occur functionally badly to bring destructive strike to terminal and terminal user.
To sum up, in low temperature environment, the display device of terminal there will be the problem starting exception.
Summary of the invention
The invention provides a kind of method and the current detecting chip that adjust voltage, in order to solve because environment temperature is too low in prior art, terminal presentation facility there will be the problem starting exception.
Based on the problems referred to above, the embodiment of the present invention provides a kind of method adjusting voltage, comprising:
Current detecting chip is determined to transform magnitude of voltage corresponding to the current value that obtains by the drain current of panel itself pixel;
If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range;
Magnitude of voltage after described adjustment is converted into voltage signal and exports by current detecting chip.
Because the current detecting chip of the embodiment of the present invention can the drain current of detection faces intralamellar part pixel, and this drain current is converted into current value, by searching the magnitude of voltage determining that this current value is corresponding, by judging the scope whether this magnitude of voltage is setting, if not in the scope of setting, then current detecting chip adjusts the scope of this magnitude of voltage to setting by program, ensures that can the drain current of described panel itself pixel make terminal presentation facility normally start.
Optionally, described current detecting chip also comprises before determining to transform magnitude of voltage corresponding to the current value that obtains by panel itself pixel drain current:
Current detecting chip is connected by draining with one or more pixels of panel itself, detects and obtains described drain current.
Be connected because the current detecting chip of the embodiment of the present invention to be drained with one or more pixels of panel itself by wire, thus can the pixel drain current of control surface intralamellar part in real time.
Optionally, described current value comprises turn on current value, described turn on current value corresponding voltage value VGH;
If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, comprising:
If described magnitude of voltage VGH is less than the first threshold of setting, then described magnitude of voltage VGH is adjusted to first threshold by current detecting chip.
The preset range writing magnitude of voltage VGH due to the embodiment of the present invention in the program of current detecting chip is the first threshold being not less than setting, when magnitude of voltage VGH is less than the first threshold of setting, described magnitude of voltage VGH is adjusted to first threshold, achieve and magnitude of voltage VGH is adjusted, ensure that magnitude of voltage VGH is in preset range, thus ensure that terminal presentation facility can normally start.
Optionally, described current value comprises cutoff current value, described cutoff current value corresponding voltage value VGL;
If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, comprising:
If described magnitude of voltage VGL is not between Second Threshold and the 3rd threshold value, then described magnitude of voltage VGL is adjusted to the 3rd threshold value by current detecting chip;
Wherein, described Second Threshold is greater than the 3rd threshold value.
Due to the embodiment of the present invention because the embodiment of the present invention writes the preset range of magnitude of voltage VGL between Second Threshold and the 3rd threshold value in the program of current detecting chip, described magnitude of voltage VGL is adjusted to the 3rd threshold value or not between Second Threshold and the 3rd threshold value time, achieve and magnitude of voltage VGL is adjusted, ensure that magnitude of voltage VGL is in preset range, thus ensure that terminal presentation facility can normally start.
Optionally, described current detecting chip also comprises after determining to transform magnitude of voltage corresponding to the current value that obtains by the drain current of the pixel of panel itself:
If described magnitude of voltage is in preset range, then described magnitude of voltage is converted into voltage signal and exports by current detecting chip.
If because embodiment of the present invention magnitude of voltage VGH and magnitude of voltage VGL is all in preset range, then do not need to adjust magnitude of voltage VGH and magnitude of voltage VGL, this magnitude of voltage of direct output, while guarantee terminal presentation facility can normally start, also improves the efficiency of Voltage Cortrol.
On the other hand, a kind of current detecting chip adjusting voltage that the embodiment of the present application provides, comprising:
Determination module, transforms magnitude of voltage corresponding to the current value that obtains for determining by the drain current of panel itself pixel;
Judge module, if for described magnitude of voltage not in preset range, then adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range;
Processing module, for being converted into voltage signal by the magnitude of voltage after described adjustment and exporting.
Optionally, described determination module also for:
Being connected by draining with one or more pixels of panel itself, detecting and obtaining described drain current.
Optionally, described current value comprises turn on current value, described turn on current value corresponding voltage value VGH;
Described judge module specifically for:
If described magnitude of voltage VGH is less than the first threshold of setting, then described magnitude of voltage VGH is adjusted to first threshold by current detecting chip.
Optionally, described current value comprises cutoff current value, described cutoff current value corresponding voltage value VGL;
Described judging treatmenting module specifically for:
If described magnitude of voltage VGL not between Second Threshold and the 3rd threshold value, is then adjusted to the 3rd threshold value by described magnitude of voltage VGL; Wherein, described Second Threshold is greater than the 3rd threshold value.
Optionally, described determination module also for:
If described magnitude of voltage is in preset range, then described magnitude of voltage is converted into voltage signal and exports.
Accompanying drawing explanation
A kind of schematic flow sheet adjusting voltage method that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 to be embodiment of the present invention current detecting chip with pixel drain structural representation be connected;
Fig. 3 is terminal presentation facility starting state figure under different VGH and VGL of the embodiment of the present invention;
Fig. 4 is embodiment of the present invention TFT performance diagram;
Fig. 5 is the curve map of the On current Ion that the different VGH of the embodiment of the present invention is corresponding;
Fig. 6 is the curve map of the cut-off current Ioff that the different VGL of the embodiment of the present invention is corresponding;
Fig. 7 is the transfer process schematic diagram that embodiment of the present invention detection TFT electric current and VGH export;
Fig. 8 is current value and magnitude of voltage VGH corresponding relation figure in embodiment of the present invention database;
Fig. 9 is the transfer process schematic diagram that embodiment of the present invention detection TFT electric current and VGL export;
Figure 10 is current value and magnitude of voltage VGL corresponding relation figure in embodiment of the present invention database;
A kind of overall flow schematic diagram adjusting voltage method that Figure 11 provides for the embodiment of the present invention;
A kind of structural representation adjusting the current detecting chip of voltage that Figure 12 provides for the embodiment of the present invention.
Embodiment
The current detecting chip of the embodiment of the present invention is determined to transform magnitude of voltage corresponding to the current value that obtains by the drain current of panel itself pixel; If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range; Magnitude of voltage after described adjustment is converted into voltage signal and exports by current detecting chip.Because the current detecting chip of the embodiment of the present invention can the drain current of detection faces intralamellar part pixel, and this drain current is converted into current value, by searching the magnitude of voltage determining that this current value is corresponding, by judging the scope whether this magnitude of voltage is setting, if not in the scope of setting, then current detecting chip adjusts the scope of this magnitude of voltage to setting by program, ensures that can the drain current of described panel itself pixel make terminal presentation facility normally start.
Below in conjunction with Figure of description, the embodiment of the present application is described in further detail.
As shown in Figure 1, a kind of method adjusting voltage of the embodiment of the present invention comprises:
Step 101, current detecting chip is determined to transform magnitude of voltage corresponding to the current value that obtains by the drain current of panel itself pixel;
Step 102, if described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range;
Step 103, the magnitude of voltage after described adjustment is converted into voltage signal and exports by current detecting chip.
Wherein, current detecting chip is positioned on FPC (FlexiblePrintedCircuitboard, flexible print wiring board), and current detecting chip to be drained with panel itself pixel by wire and is connected.
It should be noted that, current detecting chip drains with the some pixels of panel itself and is connected, and because all pixel drain currents of panel itself are all approximately equalised, thus can the inner some pixels of Selection Floater drain; Or current detecting chip drains with the multiple pixel of panel itself and is connected, choose the multiple pixel of panel itself all with current detecting chip links, the accuracy of the detection of pixel drain current can be improved.
Drain for the some pixels of current detecting chip and panel itself below and be connected, be illustrated in figure 2 current detecting chip and the some pixels of panel itself to drain the concrete connected mode be connected, current detecting chip is by the drain current of wire detection faces intralamellar part pixel.
Optionally, current value comprises turn on current value and cutoff current value, turn on current value corresponding voltage value VGH, cutoff current value corresponding voltage value VGL;
If described magnitude of voltage VGH is less than the first threshold of setting, then described magnitude of voltage VGH is adjusted to first threshold by current detecting chip;
If described magnitude of voltage VGL is not between Second Threshold and the 3rd threshold value, then described magnitude of voltage VGL is adjusted to the 3rd threshold value by current detecting chip; Wherein, described Second Threshold is greater than the 3rd threshold value.
It should be noted that, be only not less than the first threshold of setting at magnitude of voltage VGH, and magnitude of voltage VGL between Second Threshold and the 3rd threshold value time, corresponding On current and cut-off current just can meet the demands, and the display device of terminal could normally start.
Optionally, after described current detecting chip determines to transform magnitude of voltage corresponding to the current value that obtains by the drain current of the pixel of panel itself, if judge, described magnitude of voltage is in preset range, then described magnitude of voltage is converted into voltage signal and exports by current detecting chip.
In the embodiment of the present invention, if magnitude of voltage VGH is not less than the first threshold of setting, or magnitude of voltage VGL between Second Threshold and the 3rd threshold value time, magnitude of voltage is in preset range, then do not need to adjust voltage, current detecting chip only needs above-mentioned magnitude of voltage is converted into voltage signal and exports.
It should be noted that, magnitude of voltage after adjustment is converted into voltage signal and exports by current detecting chip, or do not adjust voltage, above-mentioned magnitude of voltage is converted into voltage signal and exports by current detecting chip, using the voltage signal of output as the voltage applied external circuit.
Wherein, the first threshold set, Second Threshold and the 3rd threshold value are obtained by simulated experiment; following concrete simulated experiment is only illustrating of the experiment method of embodiment of the present invention determination first threshold, Second Threshold and the 3rd threshold value; anyly can determine that the experiment method of first threshold, Second Threshold and the 3rd threshold value is all applicable to the present invention, the experiment method of the determination first threshold of the present invention and protection, Second Threshold and the 3rd threshold value is not limited to following concrete simulated experiment.
Concrete simulated experiment is:
Choose 50PCS sample, under the environmental baseline of-20 DEG C, carry out cold-starting simplation verification in kind, apply different VGH and VGL to sample respectively, can observe sample normally start, as shown in Figure 3, VGH=9V is applied to sample, during VGL=-12V, sample running status, for all to light, is 50PCS sample and all can normally starts; When applying VGH=12V, VGL=-14V to sample, sample running status, for all to light, is 50PCS sample and all can normally starts; VGH=12V is applied to sample, during VGL=-15V, sample running status is have 2PPCS not light in 50PCS sample, be in 50PCS sample and have 2PCS normally to start, that is at VGH=12V, VGL=-15V starts to occur that sample can not normally start, then show that first threshold that VGH is corresponding be the Second Threshold that 12V, VGL are corresponding is-15V.
It should be noted that, by cold-starting simulated experiment, using VGH=12V as first threshold corresponding to VGH, but as can be seen from above-mentioned test figure, at VGH=9V, during VGL=-12V, sample running status for all to light, that is, when magnitude of voltage VGH is less than the first threshold of setting, also display device likely being made normally to start, but in order to reach better effect, choosing 12V as first threshold corresponding to VGH.
Then, TFT evaluating characteristics is carried out to this 50PCS sample, its TFT curve average as shown in Figure 4, the On current that wherein VGH=12V is corresponding is 0.74uA, the cut-off current that VGL=-15V is corresponding is 7pA, can draw from the TFT curve of Fig. 4, when VGL=-12V, corresponding cut-off current Ioff is minimum, and now cut-off current is 1pA, TFT principle is had to draw, if sample normally starts, then need to ensure that On current increases as much as possible, cut-off current reduces as much as possible, namely-15V < VGL≤-12V is required, and VGH >=12V.
50PCS sample is being carried out to TFT evaluating characteristics and obtain the curve map of magnitude of voltage as Fig. 5 and Fig. 6 and current value, wherein, Fig. 5 is the curve map of the On current Ion that magnitude of voltage VGH is corresponding, and Fig. 6 is the curve map of the cut-off current Ioff that magnitude of voltage VGL is corresponding.
The embodiment of the present invention is obtained by above-mentioned simulated experiment: if described magnitude of voltage VGH is less than 12V, then described magnitude of voltage VGH is adjusted to 12V by current detecting chip; If described magnitude of voltage VGL is not between-15V and-12V, then described magnitude of voltage VGL is adjusted to-12V by current detecting chip.
Magnitude of voltage VGH >=the 12V obtained will be tested in the embodiment of the present invention, in the internal arithmetic program of the preset range reset current detection chip of-15V < VGL≤-12V, so that current detecting chip judges that whether magnitude of voltage that the drain current that detects is corresponding is in preset range.
The method of concrete adjustment voltage is described for magnitude of voltage VGH and magnitude of voltage VGL below respectively.
One, for the method for the adjustment voltage of magnitude of voltage VGH.
As shown in Figure 7, current detecting chip detection is to panel itself pixel drain electrode On current, and be initial current, the current signal of simulation is converted into digital signal by digital quantizer by initial current; To transform the digital data transmission of the electric current obtained to showing look-up table, display look-up table, according to the current digital signal received, searches corresponding magnitude of voltage in a database, wherein, as shown in Figure 8, database comprises magnitude of voltage VGH corresponding to each current digital signal, wherein, 0000,0001,0010 all represents current value, and the magnitude of voltage of 0000 correspondence is VGH1, the magnitude of voltage of 0001 correspondence is VGH2, and the magnitude of voltage of 0010 correspondence is VGH3; After determining magnitude of voltage VGH, current detecting chip judges whether described magnitude of voltage VGH is less than 12V, if magnitude of voltage VGH is less than 12V, then LUT exports 12V, if magnitude of voltage VGH is not less than 12V, then described magnitude of voltage VGH exports by LUT; After LUT output voltage values, be converted into voltage signal through regulator, wherein regulator is by VGH
refvoltage signal is provided, preferably chooses VGH
reffor 20V, the voltage signal obtained after regulator process is using the voltage signal as external circuit.
In enforcement; the current value that the current signal needing the voltage comprising the applying of all external circuit to produce in database is corresponding; and the corresponding magnitude of voltage of each current value; the scope of this magnitude of voltage chooses-20V ~ 20V; be the range of voltage values of external circuit; wherein, the scope of described magnitude of voltage chooses the preferable range that-20V ~ 20V is the embodiment of the present invention, and the scope of the magnitude of voltage that the embodiment of the present invention wants protected data storehouse to comprise is not limited to above-mentioned scope.
It should be noted that, display look-up table and database that output voltage signal adopts is adjusted just in order to illustrating of adjustment voltage method is described in the embodiment of the present invention, anyly can to realize by digital current values, to determine that the functional module of the magnitude of voltage that described current value is corresponding all can be applicable to the present invention; In the embodiment of the present invention, regulator is also that magnitude of voltage is converted into illustrating of voltage signal by the embodiment of the present invention, and any module that can realize this conversion is also applicable to the present invention.
Two, for the method for the adjustment voltage of magnitude of voltage VGL.
As shown in Figure 9, current detecting chip detection, to panel itself pixel drain cut off current, is initial current, and the current signal of simulation is converted into digital signal by digital quantizer by initial current; To transform the digital data transmission of the electric current obtained to showing look-up table, display look-up table, according to the current digital signal received, searches corresponding magnitude of voltage in a database, wherein, as shown in Figure 10, database comprises magnitude of voltage VGL corresponding to each current digital signal, wherein, 1000,1001,1010 all represent current value, and the magnitude of voltage of 1000 correspondences is VGL1, the magnitude of voltage of 1001 correspondences is VGL2, and the magnitude of voltage of 1010 correspondences is VGL3; After determining magnitude of voltage VGL, current detecting chip judges whether described magnitude of voltage VGL is greater than-15V and is less than-12V, if magnitude of voltage VGL is not more than-15V, or magnitude of voltage VGL is not less than-12V, then LUT output-12V, if magnitude of voltage VGH is greater than-15V and is less than-12V, then show look-up table and described magnitude of voltage VGL is exported; After display look-up table output voltage values, be converted into voltage signal through regulator, wherein regulator is by VGH
refvoltage signal is provided, preferably chooses VGH
reffor 20V, the voltage signal obtained after regulator process is using the voltage signal as external circuit.
In enforcement; the current value that the current signal needing the voltage comprising the applying of all external circuit to produce in database is corresponding; and the corresponding magnitude of voltage of each current value; the scope of this magnitude of voltage chooses-20V ~ 20V; be the range of voltage values of external circuit; wherein, the scope of described magnitude of voltage chooses the preferable range that-20V ~ 20V is the embodiment of the present invention, and the scope of the magnitude of voltage that the embodiment of the present invention wants protected data storehouse to comprise is not limited to above-mentioned scope.
It should be noted that, display look-up table and database that output voltage signal adopts is adjusted just in order to illustrating of adjustment voltage method is described in the embodiment of the present invention, anyly can to realize by digital current values, to determine that the functional module of the magnitude of voltage that described current value is corresponding all can be applicable to the present invention; In the embodiment of the present invention, regulator is also that magnitude of voltage is converted into illustrating of voltage signal by the embodiment of the present invention, and any module that can realize this conversion is all applicable to the present invention.
As shown in figure 11, the overall flow figure of voltage method is adjusted for the embodiment of the present invention is a kind of.
Step 1101, current detecting chip detection is to the drain current of panel itself pixel, and wherein drain current comprises On current and cut-off current;
Step 1102, is converted into current value Ion by described On current, and cut-off current is converted into current value Ioff;
Step 1103, determines the magnitude of voltage VGH that described current value Ion is corresponding and the magnitude of voltage VGL that current value Ioff is corresponding;
Step 1104, judges whether described magnitude of voltage VGH is less than first threshold, if so, performs step 1105, if not, performs step 1106;
Step 1105, is adjusted to first threshold by described magnitude of voltage VGH and exports;
Step 1106, direct voltage output value VGH;
Step 1107, judges described magnitude of voltage VGL whether between Second Threshold and the 3rd threshold value, if so, performs step 1108, if not, performs step 1109;
Step 1108, direct voltage output value VGL;
Step 1109, is adjusted to the 3rd threshold value by described magnitude of voltage VGL and exports;
Step 1110, is converted into voltage signal and exports by magnitude of voltage VGH and magnitude of voltage VGL.
Based on same inventive concept, a kind of current detecting chip adjusting voltage is additionally provided in the embodiment of the present application, the principle of dealing with problems due to this current detecting chip is similar to the method that the embodiment of the present application adjusts voltage, therefore the enforcement of this current detecting chip see the enforcement of method, can repeat part and repeats no more.
As shown in figure 12, a kind of current detecting chip adjusting voltage that the embodiment of the present invention provides, comprising:
Determination module 1201, transforms magnitude of voltage corresponding to the current value that obtains for determining by the drain current of panel itself pixel;
Judge module 1202, if for described magnitude of voltage not in preset range, then adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range;
Processing module 1203, for being converted into voltage signal by the magnitude of voltage after described adjustment and exporting.
Optionally, described determination module 1201 also for:
Being connected by draining with one or more pixels of panel itself, detecting and obtaining described drain current.
Optionally, described current value comprises turn on current value, described turn on current value corresponding voltage value VGH;
Described judge module 1202 specifically for:
If described magnitude of voltage VGH is less than the first threshold of setting, then described magnitude of voltage VGH is adjusted to first threshold by current detecting chip.
Optionally, described current value comprises cutoff current value, described cutoff current value corresponding voltage value VGL;
Described judge module 1202 module specifically for:
If described magnitude of voltage VGL not between Second Threshold and the 3rd threshold value, is then adjusted to the 3rd threshold value by described magnitude of voltage VGL; Wherein, described Second Threshold is greater than the 3rd threshold value.
Optionally, described processing module 1203 also for:
If described magnitude of voltage is in preset range, then described magnitude of voltage is converted into voltage signal and exports.
Above with reference to illustrating that the block diagram of method, device (system) and/or computer program according to the embodiment of the present application and/or process flow diagram describe the application.Should be understood that the combination that can be realized a block of block diagram and/or flowchart illustration and the block of block diagram and/or flowchart illustration by computer program instructions.These computer program instructions can be supplied to multi-purpose computer, the processor of special purpose computer and/or other programmable data treating apparatus, to produce machine, make the instruction establishment performed via computer processor and/or other programmable data treating apparatus for realizing the method for function/action specified in block diagram and/or flow chart block.
Correspondingly, the application can also be implemented with hardware and/or software (comprising firmware, resident software, microcode etc.).Further, the application can take computing machine to use or the form of computer program on computer-readable recording medium, it has the computing machine realized in media as well and can use or computer readable program code, to be used by instruction execution system or combined command executive system and using.In the present context, computing machine can use or computer-readable medium can be arbitrary medium, it can comprise, store, communicate, transmit or convey program, with by instruction execution system, device or equipment use, or combined command executive system, device or equipment use.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. adjust a method for voltage, it is characterized in that, the method comprises:
Current detecting chip is determined to transform magnitude of voltage corresponding to the current value that obtains by the drain current of panel itself pixel;
If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range;
Magnitude of voltage after described adjustment is converted into voltage signal and exports by current detecting chip.
2. the method for claim 1, is characterized in that, described current detecting chip also comprises before determining to transform magnitude of voltage corresponding to the current value that obtains by panel itself pixel drain current:
Current detecting chip is connected by draining with one or more pixels of panel itself, detects and obtains described drain current.
3. the method for claim 1, is characterized in that, described current value comprises turn on current value, described turn on current value corresponding voltage value VGH;
If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, comprising:
If described magnitude of voltage VGH is less than the first threshold of setting, then described magnitude of voltage VGH is adjusted to first threshold by current detecting chip.
4. the method as described in as arbitrary in claims 1 to 3, it is characterized in that, described current value comprises cutoff current value, described cutoff current value corresponding voltage value VGL;
If described magnitude of voltage is not in preset range, then current detecting chip adjusts described magnitude of voltage, comprising:
If described magnitude of voltage VGL is not between Second Threshold and the 3rd threshold value, then described magnitude of voltage VGL is adjusted to the 3rd threshold value by current detecting chip;
Wherein, described Second Threshold is greater than the 3rd threshold value.
5. the method as described in as arbitrary in claims 1 to 3, is characterized in that, described current detecting chip also comprises after determining to transform magnitude of voltage corresponding to the current value that obtains by the drain current of the pixel of panel itself:
If described magnitude of voltage is in preset range, then described magnitude of voltage is converted into voltage signal and exports by current detecting chip.
6. adjust a current detecting chip for voltage, it is characterized in that, comprising:
Determination module, transforms magnitude of voltage corresponding to the current value that obtains for determining by the drain current of panel itself pixel;
Judge module, if for described magnitude of voltage not in preset range, then adjusts described magnitude of voltage, to make the magnitude of voltage after adjustment in preset range;
Processing module, for being converted into voltage signal by the magnitude of voltage after described adjustment and exporting.
7. current detecting chip as claimed in claim 6, is characterized in that, described determination module also for:
Being connected by draining with one or more pixels of panel itself, detecting and obtaining described drain current.
8. current detecting chip as claimed in claim 6, it is characterized in that, described current value comprises turn on current value, described turn on current value corresponding voltage value VGH;
Described judge module specifically for:
If described magnitude of voltage VGH is less than the first threshold of setting, then described magnitude of voltage VGH is adjusted to first threshold by current detecting chip.
9. the current detecting chip as described in any one of claim 6 ~ 8, is characterized in that, described current value comprises cutoff current value, described cutoff current value corresponding voltage value VGL;
Described judge module specifically for:
If described magnitude of voltage VGL not between Second Threshold and the 3rd threshold value, is then adjusted to the 3rd threshold value by described magnitude of voltage VGL; Wherein, described Second Threshold is greater than the 3rd threshold value.
10. the current detecting chip as described in any one of claim 6 ~ 8, is characterized in that, described determination module also for:
If described magnitude of voltage is in preset range, then described magnitude of voltage is converted into voltage signal and exports.
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| CN112997239A (en) * | 2019-08-12 | 2021-06-18 | 京东方科技集团股份有限公司 | Gate driving method, gate driving circuit and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112997239A (en) * | 2019-08-12 | 2021-06-18 | 京东方科技集团股份有限公司 | Gate driving method, gate driving circuit and display device |
| CN112997239B (en) * | 2019-08-12 | 2023-04-18 | 京东方科技集团股份有限公司 | Gate driving method, gate driving circuit and display device |
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