CN205069086U - A drive circuit and display device for display panel - Google Patents
A drive circuit and display device for display panel Download PDFInfo
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- CN205069086U CN205069086U CN201520852890.9U CN201520852890U CN205069086U CN 205069086 U CN205069086 U CN 205069086U CN 201520852890 U CN201520852890 U CN 201520852890U CN 205069086 U CN205069086 U CN 205069086U
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Abstract
The utility model discloses a drive circuit and a display device of display panel. Drive circuit includes: a plurality of time schedule controller, each corresponding display area in corresponding to a plurality of display area for provide the time schedule control signal and show data signal to corresponding display area, a plurality of source driver wares, each corresponding display area in corresponding to a plurality of display area for based on the time schedule control signal to corresponding display area provide with the gray scale voltage that shows that data signal corresponds, and gamma voltage generation circuit for provide a plurality of gamma voltages to in a plurality of source driver wares each, a plurality of gamma voltages are each reference voltage that generate gray scale voltage who is arranged in for a plurality of source driver wares. Display device includes drive circuit. The utility model discloses can alleviate, alleviate or eliminate the problem that arouses because jumbo size display panel uses a plurality of drive circuit, for example the gray scale is inhomogeneous.
Description
Technical field
The utility model relates to display technique field, relates in particular to a kind of driving circuit for display panel and a kind of display device.
Background technology
Display panel (such as, liquid crystal display and organic light emitting diode display) is widely used in electronic equipment.Along with the development of technology, display panel is designed to have larger size, to meet more how different demands.For large scale display panel institute problems faced (such as, resolution, charge rate etc.), current solution is generally by being divided into multiple subregion (such as, 2x2) by display panel " virtually " and utilizing multiple driving circuit to drive respectively each subregion.
Fig. 1 schematically illustrates the block diagram of the driving circuit for carrying out the display panel split with 2x2 subregion.In this case, adopt 4 drive circuit boards, its each there is independent gamma (gamma) voltage generation circuit.Inconsistent between the different gamma electric voltages generated can cause the luminance difference of four subregions under same GTG, this so that cause GTG uneven (mura) (and separatrix is uneven possibly).
Therefore, a kind of driving circuit for display panel (especially, large scale display panel) of improvement is needed.
Utility model content
Advantageously provide a kind of driving circuit for display panel, it can alleviate, alleviates or eliminate at least one in the problems referred to above caused owing to adopting independent driving circuit.A kind of display device comprising described driving circuit is provided also advantageously.
According to an aspect of the present utility model, provide a kind of driving circuit for display panel, described display panel comprises multiple viewing area, described driving circuit comprises: multiple time schedule controller, time schedule controller described in each corresponds to a corresponding viewing area in described multiple viewing area, for providing timing control signal and display data signal to corresponding viewing area; Multiple source electrode driver, source electrode driver described in each corresponds to a corresponding viewing area in described multiple viewing area, for providing the gray scale voltage corresponding with described display data signal based on described timing control signal to corresponding viewing area; And gamma electric voltage generative circuit, for providing multiple gamma electric voltage to each in described multiple source electrode driver, each being used in described multiple source electrode driver of described multiple gamma electric voltage generates the reference voltage of described gray scale voltage.
Alternatively, described driving circuit also comprises the first DC power supplier for powering for described gamma electric voltage generative circuit.
Alternatively, described first DC power supplier comprises single DC-DC converter, for the digital circuits section of described gamma electric voltage generative circuit and artificial circuit part supplying DC power source.
Alternatively, described first DC power supplier comprises two DC-DC converters, one of them is for the digital circuits section supplying DC power source to described gamma electric voltage generative circuit, and another is for the artificial circuit part supplying DC power source to described gamma electric voltage generative circuit.
Alternatively, described driving circuit also comprises at least one second DC power supplier, and at least one second DC power supplier described is used for powering for described multiple time schedule controller.
Alternatively, each in described multiple time schedule controller is powered by different second DC power supplier.
Alternatively, being powered by same second DC power supplier at least partially in described multiple time schedule controller.
Alternatively, at least one second DC power supplier described is also for powering for described multiple source electrode driver.
Alternatively, each at least one second DC power supplier described comprises single DC-DC converter, for digital circuits section one or more accordingly and artificial circuit part supplying DC power source in one or more and described multiple source electrode driver accordingly in described multiple time schedule controller.
Alternatively, each at least one second DC power supplier described comprises two DC-DC converters, one of them is for digital circuits section supply DC voltage one or more accordingly in one or more and described multiple source electrode driver accordingly in described multiple time schedule controller, and another is for artificial circuit part supplying DC power sources one or more accordingly in described multiple source electrode driver.
According to another aspect of the present utility model, provide a kind of display device, it comprises driving circuit as described previously.
According to drawings and Examples described hereinafter, these and other aspect of the present utility model will be well-known, and be illustrated with reference to embodiment described hereinafter.
Accompanying drawing explanation
Fig. 1 schematically illustrates the block diagram of the driving circuit for carrying out the display panel split with 2x2 subregion;
Fig. 2 schematically illustrates the block diagram of the general driving circuit for display panel; And
Fig. 3 schematically illustrates the block diagram of the driving circuit 100 for display panel according to the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, each embodiment of the present utility model is described in detail.
Before elaboration embodiment of the present utility model, reference can be carried out to provide better understanding of the present utility model to Fig. 2.
Fig. 2 schematically illustrates the block diagram of the general driving circuit for display panel.As shown in the figure, time schedule controller (TCON) provide control signal to gate drivers and source electrode driver, and provide display data signal to source electrode driver.Gamma voltage generation circuit provides gamma electric voltage to source electrode driver, and source electrode driver uses described gamma electric voltage gray scale voltage corresponding to display data signal to convert to as reference voltage.Gray scale voltage is provided to pixel cell in display panel to control the deflection angle (when liquid crystal display) of liquid crystal, thus realizes the display of picture.DC-DC (DC/DC) converter provides DC operating voltage as direct current (DC) power supply of this driving circuit to time schedule controller, gate drivers, source electrode driver and gamma electric voltage generative circuit.Especially, because gamma electric voltage generative circuit and source electrode driver all comprise digital circuits section and artificial circuit part, so DC/DC converter can be provided for the DC power supply (DVDD) of digital circuit and the DC power supply (AVDD) for mimic channel.The driving circuit of display panel is as shown in Figure 2 known in the art, and it will not be described in detail at this.
Fig. 3 schematically illustrates the block diagram of the driving circuit 100 for display panel according to the utility model embodiment.As previously mentioned, when large scale display panel, display panel can be split into multiple viewing area.Correspondingly, this driving circuit 100 can comprise: multiple time schedule controller 111,112,113,114, each corresponds to a corresponding viewing area in described multiple viewing area, for providing timing control signal and display data signal to corresponding viewing area; Multiple source electrode driver 121,122,123,124, each corresponds to a corresponding viewing area in described multiple viewing area, for providing the gray scale voltage corresponding with described display data signal based on described timing control signal to corresponding viewing area; And gamma electric voltage generative circuit 130, for to described multiple source electrode driver 121,122,123, each in 124 provides multiple gamma electric voltage, and described multiple gamma electric voltage is used to described multiple source electrode driver 121,122,123, each in 124 generates the reference voltage of described gray scale voltage.
In this example, display panel comprises 2x2 viewing area.Therefore, driving circuit 100 is illustrated as and comprises 4 time schedule controllers and 4 source electrode drivers.Especially, driving circuit 100 only comprises a gamma electric voltage generative circuit 130, and this gamma electric voltage generative circuit 130 is to the source electrode driver 121,122,123 in driving circuit 100, and each in 124 provides multiple gamma electric voltage.As previously mentioned, multiple gamma electric voltage is used as reference voltage by source electrode driver and gray scale voltage corresponding to display data signal converts to.In the present embodiment, because all source electrode drivers 121,122,123,124 all use identical reference voltage, therefore they can keep consistency when transforms display data.In other words, identical display data will be converted into identical gray scale voltage.Like this, the GTG uneven (and separatrix is uneven possibly) between each viewing area of causing due to reason that reference voltage is inconsistent can be eliminated.Should be understood that, the number of viewing area included by display panel (and time schedule controller therefore and source electrode driver) is illustrative; More or less viewing area can be comprised.
Further, driving circuit 100 also comprises the first independent DC power module 140 for powering for gamma electric voltage generative circuit 130.The supply voltage that gamma electric voltage generative circuit 130 provides based on the first DC power module 140 generates gamma electric voltage.Because the first DC power module 140 is exclusively used in as gamma electric voltage generative circuit 130 is powered, so the impact that the work of other circuit can be avoided to cause to supply voltage (such as, ripple etc.), improve the stability of the gamma electric voltage that result obtains.DC power module can realize with DC/DC converter usually.Exemplarily, the first DC power module 140 can comprise single DC/DC converter.This single DC/DC converter can to the digital circuits section of gamma electric voltage generative circuit 130 and artificial circuit part supply DC power supply.Alternatively, the first DC power module 140 can comprise two DC/DC converters.A DC/DC converter can supply DC power supply to the digital circuits section of gamma electric voltage generative circuit 130, and another can to the artificial circuit part supply DC power supply of gamma electric voltage generative circuit 130.It is favourable for being separated with analog D c-power supply by digital DC power supply, because noise can be incorporated in mimic channel by the switching of digital signal.
Driving circuit 100 can also comprise at least one second DC power module 150 being different from the first DC power module 140.At least one second DC power module 150 can be the power supply of multiple time schedule controller 111,112,113,114.Exemplarily, multiple time schedule controller 111,112,113, each in 114 can be powered by different second DC power module 150.As another example, multiple time schedule controller 111,112,113, can be powered by same second DC power module 150 at least partially in 114.In the example depicted in fig. 3, time schedule controller 111 and 113 is powered by the DC power supplier 150 on the left side, and time schedule controller 112 and 114 is powered by the DC power supplier 150 on the right.In the conceived case, multiple time schedule controller 111,112,113,114 even can by second DC power module 150 centrally connected power supply.This can be favourable, such as, because use different DC power modules to power to different time schedule controllers may cause that TCON's is asynchronous, the reason of the power-on time difference caused due to factors such as circuit layouts.
In addition, indicated by the dotted line in Fig. 3, at least one second DC power module 150 can also be the power supply of multiple source electrode driver 121,122,123,124.In the example shown in the series of figures, source electrode driver 121 and 123 is powered by the DC power supplier 150 on the left side, and source electrode driver 122 and 124 is powered by the DC power supplier 150 on the right.Similarly, each at least one second DC power module 150 can comprise single DC/DC converter, for digital circuits section one or more accordingly and artificial circuit part supplying DC power source in one or more and multiple source electrode driver accordingly in multiple time schedule controller.Alternatively, each at least one second DC power module 150 comprises two DC/DC converters, one of them is for digital circuits section one or more accordingly in one or more and multiple source electrode driver accordingly in multiple time schedule controller supply DC voltage, and another is for artificial circuit part supplying DC power sources one or more accordingly in multiple source electrode driver.Should be understood that, the number of the DC/DC converter that the first DC power module 140 and the second DC power module 150 comprise is illustrative; More or less DC/DC converter can be comprised.
According to another aspect of the present utility model, additionally provide a kind of display device, it comprises driving circuit as described previously.Exemplarily unrestricted, display device can be TV screen, desktop computer display, laptop display, touch-screen or can provide any other parts or the product of Presentation Function.
Although discussion above comprises and somely specifically realizes details, these should not be construed as to any utility model or may be claimed the restriction of scope, and the description of the feature to the specific embodiment that may be only limitted to specific utility model should be interpreted as.The special characteristic described in embodiments different in this manual also can realize in combination in single embodiment.In contrast, the different characteristic described in single embodiment also can realize in many embodiment: respectively or with any suitable sub-portfolio form.In addition; work with particular combination although may describe feature as above; even initial also by so claimed; but also can get rid of from this combination in some cases from the one or more features in combination required for protection, and this claimed combination can be directed to the modification of sub-portfolio or sub-portfolio.
Therefore, should be appreciated that embodiment of the present utility model is not limited to disclosed specific embodiment, and amendment and other embodiment are also intended within the scope of the appended claims involved.Although employ particular term herein, they only use in general and descriptive sense, but not the object in order to limit.
Claims (11)
1. for a driving circuit for display panel, described display panel comprises multiple viewing area, and described driving circuit comprises:
Multiple time schedule controller, time schedule controller described in each corresponds to a corresponding viewing area in described multiple viewing area, for providing timing control signal and display data signal to corresponding viewing area;
Multiple source electrode driver, source electrode driver described in each corresponds to a corresponding viewing area in described multiple viewing area, for providing the gray scale voltage corresponding with described display data signal based on described timing control signal to corresponding viewing area; And
Gamma electric voltage generative circuit, for providing multiple gamma electric voltage to each in described multiple source electrode driver, each being used in described multiple source electrode driver of described multiple gamma electric voltage generates the reference voltage of described gray scale voltage.
2. driving circuit according to claim 1, also comprises the first DC power supplier for powering for described gamma electric voltage generative circuit.
3. driving circuit according to claim 2, wherein, described first DC power supplier comprises single DC-DC converter, for the digital circuits section of described gamma electric voltage generative circuit and artificial circuit part supplying DC power source.
4. driving circuit according to claim 2, wherein, described first DC power supplier comprises two DC-DC converters, one of them is for the digital circuits section supplying DC power source to described gamma electric voltage generative circuit, and another is for the artificial circuit part supplying DC power source to described gamma electric voltage generative circuit.
5. driving circuit according to claim 2, also comprises at least one second DC power supplier, and at least one second DC power supplier described is used for powering for described multiple time schedule controller.
6. driving circuit according to claim 5, wherein, each in described multiple time schedule controller is powered by different second DC power supplier.
7. driving circuit according to claim 5, wherein, being powered by same second DC power supplier at least partially in described multiple time schedule controller.
8. driving circuit according to claim 5, wherein, at least one second DC power supplier described is also for powering for described multiple source electrode driver.
9. driving circuit according to claim 8, wherein, each at least one second DC power supplier described comprises single DC-DC converter, for digital circuits section one or more accordingly and artificial circuit part supplying DC power source in one or more and described multiple source electrode driver accordingly in described multiple time schedule controller.
10. driving circuit according to claim 8, wherein, each at least one second DC power supplier described comprises two DC-DC converters, one of them is for digital circuits section supply DC voltage one or more accordingly in one or more and described multiple source electrode driver accordingly in described multiple time schedule controller, and another is for artificial circuit part supplying DC power sources one or more accordingly in described multiple source electrode driver.
11. 1 kinds of display device, comprise the driving circuit according to any one of claim 1-10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520852890.9U CN205069086U (en) | 2015-10-30 | 2015-10-30 | A drive circuit and display device for display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520852890.9U CN205069086U (en) | 2015-10-30 | 2015-10-30 | A drive circuit and display device for display panel |
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| CN205069086U true CN205069086U (en) | 2016-03-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017071492A1 (en) * | 2015-10-30 | 2017-05-04 | 京东方科技集团股份有限公司 | Drive circuit for use in a display panel and display device |
| CN106710560A (en) * | 2017-02-28 | 2017-05-24 | 昆山龙腾光电有限公司 | Driving circuit for display panel and display device |
| CN107342060A (en) * | 2017-09-13 | 2017-11-10 | 京东方科技集团股份有限公司 | Driving chip and display device |
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2015
- 2015-10-30 CN CN201520852890.9U patent/CN205069086U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017071492A1 (en) * | 2015-10-30 | 2017-05-04 | 京东方科技集团股份有限公司 | Drive circuit for use in a display panel and display device |
| US10274766B2 (en) | 2015-10-30 | 2019-04-30 | Boe Technology Group Co., Ltd. | Driving circuit for display panel comprising a plurality of display areas, and display apparatus |
| CN106710560A (en) * | 2017-02-28 | 2017-05-24 | 昆山龙腾光电有限公司 | Driving circuit for display panel and display device |
| CN107342060A (en) * | 2017-09-13 | 2017-11-10 | 京东方科技集团股份有限公司 | Driving chip and display device |
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Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee after: BOE Technology Group Co., Ltd. Address before: Beijing economic and Technological Development Zone 100176 Beijing Zelu 9 Patentee before: BOE Technology Group Co., Ltd. |