CN102930816A - Adjusting device and display device and adjusting method of data voltage - Google Patents
Adjusting device and display device and adjusting method of data voltage Download PDFInfo
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Abstract
The invention provides an adjusting device and a display device and an adjusting method of data voltage. The adjusting device of the data voltage comprises a plurality of source actuator integrated circuits which correspond to a plurality of display areas of the display device. Each display area is provided with a plurality of data lines. Each source actuator integrated circuit comprises a receiving module which is used for receiving digital video data, a data conversion module, an output voltage translational module and an output module. The data conversion module is used for conducting digital-to-analogue conversion for digital video data, so that simulated data voltage is obtained. The output voltage translational module is used for carrying out translational action for the simulated data voltage according to a voltage difference between public electrode voltage and benchmark public electrode voltage of each corresponding display area, so that translational simulated data voltage is obtained. The output module is used for outputting of the translational simulated data voltage to the data lines of each corresponding display area. The adjusting device and the display device and the adjusting method of the data voltage can adjust the data voltage of the data lines, wherein the data voltage of the data lines is outputted to the display areas, so that inconsistence of a virtual computer (VCOM) in the display areas is balanced.
Description
Technical field
The present invention relates to the display technique field, relate in particular to a kind of control method of regulating device, display device and data voltage of data voltage.
Background technology
Reason owing to manufacture craft, TFT(Thin Film Transistor, Thin Film Transistor (TFT)) LCD(Liquid Crystal Display, may there be the inconsistent defective of thin and thick in the TFT in (Panel) both sides of display panel liquid crystal display) and centre position, thereby cause the left side of display panel to AA ' (the Active Area on right side, the effective display area territory) the VCOM(public electrode voltages among the district) inconsistent, the display effect of display is impacted.
Summary of the invention
In view of this, the invention provides a kind of control method of regulating device, display device and data voltage of data voltage, to solve the inconsistent problem that affects the display effect of display of VCOM of in the prior art because left side among distinguishing to the AA ' on right side.
For addressing the above problem, the invention provides a kind of regulating device of data voltage, be applied to a display device, the regulating device of described data voltage comprises a plurality of Source drive integrated circuit, described a plurality of Source drive integrated circuit is corresponding one by one with a plurality of viewing areas of described display device, wherein, has many data lines in each viewing area, many data lines in the described viewing area connect with corresponding Source drive integrated circuit, and described Source drive integrated circuit comprises:
Receiver module is used for the receiving digital video data;
D/A converter module is used for described digital of digital video data is carried out digital-to-analog conversion, obtains analog data voltage;
Output voltage translation module is used for according to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages described analog data voltage being carried out translation, obtains the analog data voltage after the translation;
Output module is for the data line that the analog data voltage after the described translation is exported to corresponding viewing area.
The present invention also provides a kind of display device, comprises the regulating device of above-mentioned data voltage.
Preferably, described display device also comprises:
Time schedule controller is used for obtaining the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, and described Source drive integrated circuit corresponding to described voltage difference exports to.
Preferably, described display device also comprises:
Memory module is used for storing the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of benchmark public electrode voltages;
Described time schedule controller comprises:
Working storage;
Read module is used for reading the described voltage difference that described memory module is stored, and described voltage difference is write described working storage;
Output module is used for exporting the described voltage difference of described working storage storage to described Source drive integrated circuit.
Preferably, described display device also comprises:
First detection module is for detection of the public electrode voltages of viewing area corresponding to described Source drive integrated circuit;
Computing module is used for calculating the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of described benchmark public electrode voltages.
Preferably, described benchmark public electrode voltages is the public electrode voltages of the default viewing area in described a plurality of viewing area, and described display device also comprises:
The second detection module for detection of the public electrode voltages of described default viewing area, obtains described benchmark public electrode voltages.
The present invention also provides a kind of control method of data voltage, be applied to the regulating device of the data voltage in the display device, the regulating device of described data voltage comprises a plurality of Source drive integrated circuit, described a plurality of Source drive integrated circuit is corresponding one by one with a plurality of viewing areas of described display device, wherein, have many data lines in each viewing area, many data lines in the described viewing area connect with corresponding Source drive integrated circuit, and described method comprises:
The receiving digital video data;
Described digital of digital video data is carried out digital-to-analog conversion, obtain analog data voltage;
According to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages, described analog data voltage is carried out translation, obtain the analog data voltage after the translation;
Export the analog data voltage after the described translation in the corresponding viewing area data line.
The public electrode voltages of the viewing area that preferably, described Source drive integrated circuit is corresponding and the voltage difference of benchmark public electrode voltages export described Source drive integrated circuit to by the time schedule controller of described display device.
The present invention has following beneficial effect:
Can be according to the public electrode voltages of the viewing area of Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, adjust this Source drive integrated circuit output to the data voltage of the data line of corresponding viewing area, with inconsistent VCOM in each viewing area of balance, thus the display effect of raising display device.
Description of drawings
Fig. 1 is a structural representation of the display device of the embodiment of the invention one;
Fig. 2 is another structural representation of the display device of the embodiment of the invention one;
Fig. 3 is the structural representation of the Source drive integrated circuit of the embodiment of the invention one;
Fig. 4 is the structural representation of the display device of the embodiment of the invention three;
Fig. 5 is the structural representation of the display device of the embodiment of the invention four;
Fig. 6 is the structural representation of the time schedule controller of the embodiment of the invention four;
Fig. 7 is the structural representation of control method of the data voltage of the embodiment of the invention five.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
Embodiment one
Please refer to Fig. 1, the regulating device of the data voltage of embodiments of the invention one is applied in the display device 100, the regulating device of this data voltage comprises a plurality of Source drive integrated circuit (Source Driver IC) 102a, 102b, 102c, 102d, described a plurality of Source drive integrated circuit 102a, 102b, 102c, a plurality of viewing area 103a of 102d and described display device 100,103b, 103c, 103d is corresponding one by one, wherein, have many data line (not shown) in each viewing area, many data lines in the described viewing area connect with corresponding Source drive integrated circuit.
Because manufacture craft, may there be the inconsistent defective of thin and thick in the TFT in each viewing area of display device 100, thereby causes the VCOM of each viewing area inconsistent, and the display effect of display device 100 is impacted.
Please refer to Fig. 2, the grid of the TFT on the display device 100 is connected to gate lines G L, and source electrode is connected to data line DL, and drain electrode is connected to pixel electrode and the holding capacitor Cst of the liquid crystal cells Clc of display device 100.VCOM is the public electrode voltages of supplying with to the public electrode of liquid crystal unit Clc.When supplying with scanning impulse for gate lines G L, the TFT conducting, form passage between the source electrode of TFT and the drain electrode, the data voltage of data line DL is supplied to the pixel electrode of liquid crystal cells Clc, at this moment, the Liquid Crystal Molecules Alignment of liquid crystal cells Clc is owing to the electric field between pixel electrode and the public electrode changes, thus modulating the incident light.Can find out from foregoing description, the pixel voltage of the pixel electrode of liquid crystal cells Clc is determined by the data voltage of data line DL, thereby can export by adjustment the data voltage of the data line DL of viewing area to, come VCOM inconsistent of each viewing area of balance.
Based on above-mentioned analysis, in the present embodiment, can set a benchmark public electrode voltages VCOM ' for four viewing area 103a, 103b, 103c, 103d, obtain the voltage difference of viewing area corresponding to each Source drive integrated circuit and benchmark public electrode voltages VCOM ', then according to this voltage difference, analog data voltage to the Source drive integrated circuit carries out translation, obtain the analog data voltage after the translation, and export the analog data voltage after the described translation data line of corresponding viewing area to, inconsistent with the VCOM of each viewing area of balance.
Corresponding to foregoing description, as shown in Figure 3, the Source drive integrated circuit of the embodiment of the invention can comprise:
D/A converter module 302 is used for described digital of digital video data is carried out digital-to-analog conversion, obtains analog data voltage;
Output voltage translation module 303 is used for according to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages described analog data voltage being carried out translation, obtains the analog data voltage after the translation;
Benchmark public electrode voltages VCOM ' in the present embodiment can be a predefined magnitude of voltage, also can be the public electrode voltages of the arbitrary viewing area chosen from described four viewing area 103a, 103b, 103c, 103d.
The regulating device of the data voltage that provides by above-described embodiment, can be according to the public electrode voltages of the viewing area of Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, adjust this Source drive integrated circuit output to the data voltage of the data line of corresponding viewing area, with inconsistent VCOM in each viewing area of balance, thus the display effect of raising display device.
Embodiment two
Embodiments of the invention two also provide a kind of display device, comprise the regulating device of the data voltage in above-described embodiment one, and the structure of the regulating device of this data voltage no longer is repeated in this description.
Embodiment three
Be illustrated in figure 4 as the structural representation of the display device of the embodiment of the invention three, this display device comprises time schedule controller (TCON) 101, the regulating device of data voltage, the effective display area territory (AA ') and DC-DC circuit (DC-DC Circuit) 105, wherein, the regulating device of this data voltage comprises: four Source drive integrated circuit (Source Driver IC) 102a, 102b, 102c, 102d, this effective display area territory comprises: with described four Source drive integrated circuit 102a, 102b, 102c, 102d is four viewing area 103a one to one, 103b, 103c, 103d, wherein, all have many data line (not shown) in each viewing area, many data lines in the described viewing area connect with corresponding described Source drive integrated circuit.
This time schedule controller 101 is used for generating the digital of digital video data (TCON-Source Driver IC Data) that exports Source drive integrated circuit 102a, 102b, 102c, 102d to.
This DC-DC circuit 105 is used for generating the VCOM(public electrode voltages of the TFT that exports the viewing area to).
For inconsistent VCOM in each viewing area of balance, the Source drive integrated circuit of the embodiment of the invention comprises:
Receiver module is used for receiving the digital of digital video data that time schedule controller 101 sends;
D/A converter module is used for described digital of digital video data is carried out digital-to-analog conversion, obtains the analog data voltage corresponding with described digital of digital video data;
Output voltage translation module is used for according to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages described analog data voltage being carried out translation, obtains the analog data voltage after the translation;
Output module is for the data line that the analog data voltage after the described translation is exported to corresponding viewing area.
Benchmark public electrode voltages VCOM ' in the present embodiment can be a predefined magnitude of voltage, also can be the public electrode voltages of the arbitrary viewing area chosen from described four viewing area 103a, 103b, 103c, 103d.
The display device that provides by above-described embodiment, can be according to the public electrode voltages of the viewing area of Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, adjust this Source drive integrated circuit output to the data voltage of the data line of corresponding viewing area, with inconsistent VCOM in each viewing area of balance, thus the display effect of raising display device.
This time schedule controller 101 can adopt various ways control Source drive integrated circuit to carry out the translation of analog data voltage, and the below will describe for example.
Embodiment four
Please refer to Fig. 5, the display device of the embodiment of the invention four comprises time schedule controller (TCON) 101, the regulating device of data voltage, effective display area territory and memory module (TCON-EEPROM) 104, the regulating device of this data voltage comprises: four Source drive integrated circuit (Source Driver IC) 102a, 102b, 102c, 102d, this effective display area territory comprises: with described four Source drive integrated circuit 102a, 102b, 102c, 102d is a plurality of viewing area 103a one to one, 103b, 103c, 103d, wherein, all have many data line (not shown) in each viewing area, many data lines in the described viewing area connect with corresponding described Source drive integrated circuit.
This memory module (TCON-EEPROM) 104 is used for the public electrode voltages of viewing area corresponding to storage Source drive integrated circuit and the voltage difference of benchmark public electrode voltages.In the present embodiment, this memory module 104 is the modules that arrange separately, and certainly, in other embodiments of the invention, this memory module 104 can also be integrated in this time schedule controller 101, perhaps, also can be integrated in the regulating device of this data voltage.
Please refer to Fig. 6, this time schedule controller 101 comprises:
Working storage 1011;
Read module 1012 is used for reading the public electrode voltages of viewing area corresponding to the Source drive integrated circuit of described memory module 104 storages and the voltage difference of benchmark public electrode voltages, and described voltage difference is write described working storage 1011.
This working storage 1011 is the memory module of time schedule controller 101 inside, when display device is started shooting each time, time schedule controller 101 will read data (comprising the data that offer Source drive integrated circuit and gate driver integrated circuit (Gate driver IC)) in the outside memory module 104, and be stored in this working storage 1011, then, the data with storage in the working storage 1011 export Source drive integrated circuit and gate driver integrated circuit to.
In the present embodiment, the public electrode voltages of the viewing area that the Source drive integrated circuit is corresponding and the voltage difference of benchmark public electrode voltages are stored in the corresponding position of memory module 104, when display device is started shooting, time schedule controller 101 will read this voltage difference of the corresponding position storage of memory module 104, and be stored in this working storage 1011, then, export the described voltage difference of storage in the working storage 1011 to the Source drive integrated circuit, thereby control Source drive integrated circuit carries out the translation of analog data voltage.
With respect to existing Source drive integrated circuit, the Source drive integrated circuit in the present embodiment also needs to increase newly the pin pin that at least one is used for receiving above-mentioned voltage difference in order to receive above-mentioned voltage difference.
How the below for example controls the method that the Source drive integrated circuit carries out the translation of analog data voltage to the time schedule controller 101 in the embodiment of the invention describes.
The memory location of the working storage of the time schedule controller 101 in the present embodiment can be as shown in the table:
As can be seen from the above table, the working storage 1011 of time schedule controller 101 has 8 memory locations, wherein,
Memory location 0,1 is corresponding to Source drive integrated circuit 102a, 0 place inserts numeric representation and need to control the translation that makes progress of the analog data voltage of Source drive integrated circuit 102a in the memory location, and 1 place inserts the downward translation of analog data voltage that numeric representation need to be controlled Source drive integrated circuit 102a in the memory location;
Memory location 2,3 is corresponding to Source drive integrated circuit 102b, 2 places insert numeric representation and need to control the translation that makes progress of the analog data voltage of Source drive integrated circuit 102b in the memory location, and 3 places insert the downward translation of analog data voltage that numeric representation need to be controlled Source drive integrated circuit 102b in the memory location;
Memory location 4,5 is corresponding to Source drive integrated circuit 102c, 4 places insert numeric representation and need to control the translation that makes progress of the analog data voltage of Source drive integrated circuit 102c in the memory location, and 5 places insert the downward translation of analog data voltage that numeric representation need to be controlled Source drive integrated circuit 102c in the memory location;
Memory location 6,7 is corresponding to Source drive integrated circuit 102d, 6 places insert numeric representation and need to control the translation that makes progress of the analog data voltage of Source drive integrated circuit 102d in the memory location, and 7 places insert the downward translation of analog data voltage that numeric representation need to be controlled Source drive integrated circuit 102d in the memory location.
The voltage difference of the public electrode voltages in each viewing area of display device is VX, voltage difference VX is usually at 0.1～0.2V(volt) in the scope, thereby, in the present embodiment, can with the setting range of the analog data voltage Vout of Source drive integrated circuit according on the control that moves or move down be designed to Vout-0.2＜Vout＜Vout+0.2.
In addition, can determine that the figure place of the working storage shown in the above table is 8, then the adjustment of analog data voltage Vout is had 2 by the figure place of the working storage in the time schedule controller to the precision of the adjustment of the analog data voltage Vout of Source drive integrated circuit
8(256) rank namely to the numerical value of the every adjustment single order of analog data voltage Vout are ± 0.2/256V.
For instance, suppose VCOM take viewing area 103a as the benchmark public electrode voltages, the VCOM of viewing area 103a is 5V.The VCOM that detects viewing area 103b is 4.96V, and then the voltage difference of the VCOM of viewing area 103b and benchmark public electrode voltages is 0.04V.
The figure place of supposing working storage is 2, then the adjustment of analog data voltage Vout is had 2
2Then there is 0.2V/2 on rank
2Rank=0.05V, namely to the numerical value of the every adjustment single order of analog data voltage Vout be ± 0.05V, concrete, can adopt (0,0) the expression voltage difference is 0, and adopting (0,1) expression voltage difference is 0.05, adopts (1,0) the expression voltage difference is 0.1, and adopting (1,1) expression voltage difference is 0.15.
At this moment, time schedule controller 101 can be (0,0) to Source drive integrated circuit 102a output numerical value by the memory location, position 0 or 1 of working storage, and expression does not need the analog data voltage of translation Source drive integrated circuit 102a; Can the memory location, position 2 by working storage can be (0,1) to Source drive integrated circuit 102b output numerical value, the expression translation single order (0.05V) that the analog data voltage of Source drive integrated circuit 102b need to be made progress.
In above-described embodiment, to adopt time schedule controller 101 to obtain the public electrode voltages of viewing area corresponding to Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, and export this voltage difference to the Source drive integrated circuit, certainly, in other embodiments of the invention, can also directly export this voltage difference to the Source drive integrated circuit, public electrode voltages and the benchmark public electrode voltages of the viewing area that the Source drive integrated circuit is corresponding directly export the Source drive integrated circuit to, calculate the public electrode voltages of corresponding viewing area and the voltage difference of benchmark public electrode voltages by the Source drive integrated circuit, or, adopt miscellaneous part to obtain this voltage difference and export the Source drive integrated circuit to.
In above-described embodiment, all have four Source drive integrated circuit take display device and describe as example, certainly, in other embodiments of the invention, the number of the Source drive integrated circuit in the display device also can be other quantity.
In the embodiment of the invention, can adopt the public electrode voltages of viewing area corresponding to special parts detection resources driver IC, and calculate the public electrode voltages of detection and the voltage difference of benchmark public electrode voltages, namely the display device in above-described embodiment can also comprise:
First detection module is for detection of the public electrode voltages of viewing area corresponding to described Source drive integrated circuit;
Computing module is used for calculating the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of benchmark public electrode voltages.
When described benchmark public electrode voltages is the public electrode voltages of the default viewing area in described a plurality of viewing area, described display device can also comprise:
The second detection module for detection of the public electrode voltages of described default viewing area, obtains described benchmark public electrode voltages.
Embodiment five
Be illustrated in figure 7 as the schematic flow sheet of control method of the data voltage of embodiments of the invention five, the method is applied to the regulating device of the data voltage in the display device, the structure of the regulating device of the data voltage in the regulating device of described data voltage and above-described embodiment one is identical, comprise a plurality of Source drive integrated circuit, described a plurality of Source drive integrated circuit is corresponding one by one with a plurality of viewing areas of described display device, wherein, have many data lines in each viewing area, many data lines in the described viewing area connect with corresponding Source drive integrated circuit, said method comprising the steps of:
Step 702 is carried out digital-to-analog conversion to described digital of digital video data, obtains analog data voltage;
Step 703 according to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages, is carried out translation to described analog data voltage, obtains the analog data voltage after the translation;
Step 704 exports the analog data voltage after the described translation in the corresponding viewing area data line.
The public electrode voltages of the viewing area that wherein, the described Source drive integrated circuit in the above-mentioned steps 703 is corresponding and the voltage difference of benchmark public electrode voltages can be exported by the time schedule controller of described display device to described Source drive integrated circuit.
The control method of the data voltage that provides by above-described embodiment, can be according to the public electrode voltages of the viewing area of Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, adjust this Source drive integrated circuit output to the data voltage of the data line of corresponding viewing area, with inconsistent VCOM in each viewing area of balance, thus the display effect of raising display device.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. the regulating device of a data voltage, be applied to a display device, the regulating device of described data voltage comprises a plurality of Source drive integrated circuit, described a plurality of Source drive integrated circuit is corresponding one by one with a plurality of viewing areas of described display device, wherein, have many data lines in each viewing area, many data lines in the described viewing area connect with corresponding Source drive integrated circuit, it is characterized in that described Source drive integrated circuit comprises:
Receiver module is used for the receiving digital video data;
D/A converter module is used for described digital of digital video data is carried out digital-to-analog conversion, obtains analog data voltage;
Output voltage translation module is used for according to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages described analog data voltage being carried out translation, obtains the analog data voltage after the translation;
Output module is for the data line that the analog data voltage after the described translation is exported to corresponding viewing area.
2. a display device is characterized in that, comprises the regulating device of data voltage as claimed in claim 1.
3. display device as claimed in claim 2 is characterized in that, also comprises:
Time schedule controller is used for obtaining the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of benchmark public electrode voltages, and described Source drive integrated circuit corresponding to described voltage difference exports to.
4. display device as claimed in claim 3 is characterized in that, also comprises:
Memory module is used for storing the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of benchmark public electrode voltages;
Described time schedule controller comprises:
Working storage;
Read module is used for reading the described voltage difference that described memory module is stored, and described voltage difference is write described working storage;
Output module is used for exporting the described voltage difference of described working storage storage to described Source drive integrated circuit.
5. display device as claimed in claim 2 is characterized in that, also comprises:
First detection module is for detection of the public electrode voltages of viewing area corresponding to described Source drive integrated circuit;
Computing module is used for calculating the public electrode voltages of viewing area corresponding to described Source drive integrated circuit and the voltage difference of described benchmark public electrode voltages.
6. display device as claimed in claim 5 is characterized in that, described benchmark public electrode voltages is the public electrode voltages of the default viewing area in described a plurality of viewing area, and described display device also comprises:
The second detection module for detection of the public electrode voltages of described default viewing area, obtains described benchmark public electrode voltages.
7. the control method of a data voltage, be applied to the regulating device of the data voltage in the display device, the regulating device of described data voltage comprises a plurality of Source drive integrated circuit, described a plurality of Source drive integrated circuit is corresponding one by one with a plurality of viewing areas of described display device, wherein, have many data lines in each viewing area, many data lines in the described viewing area connect with corresponding Source drive integrated circuit, it is characterized in that described method comprises:
The receiving digital video data;
Described digital of digital video data is carried out digital-to-analog conversion, obtain analog data voltage;
According to the public electrode voltages of the viewing area of correspondence and the voltage difference of benchmark public electrode voltages, described analog data voltage is carried out translation, obtain the analog data voltage after the translation;
Export the analog data voltage after the described translation in the corresponding viewing area data line.
8. the control method of data voltage as claimed in claim 7, it is characterized in that the public electrode voltages of the viewing area that described Source drive integrated circuit is corresponding and the voltage difference of benchmark public electrode voltages export described Source drive integrated circuit to by the time schedule controller of described display device.
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| CN110890075A (en) * | 2019-11-15 | 2020-03-17 | Tcl华星光电技术有限公司 | Driving method, display panel and display device |
| CN112837660A (en) * | 2021-01-07 | 2021-05-25 | Tcl华星光电技术有限公司 | Display panel driving method, display panel and display device |
| CN114283749A (en) * | 2021-12-30 | 2022-04-05 | 京东方科技集团股份有限公司 | Source driver, display panel, display device and data driving method |
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