CN104376820A - Display device and adjusting method thereof - Google Patents
Display device and adjusting method thereof Download PDFInfo
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- CN104376820A CN104376820A CN201310355116.2A CN201310355116A CN104376820A CN 104376820 A CN104376820 A CN 104376820A CN 201310355116 A CN201310355116 A CN 201310355116A CN 104376820 A CN104376820 A CN 104376820A
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Abstract
The invention discloses a display device and an adjusting method of the display device. The display device comprises a display panel and a public voltage generating circuit. The public voltage generating circuit comprises a storage module and a sensing module, the storage module is provided with a plurality of storage spaces, the storage spaces are used for storing a plurality of public voltages respectively, each public voltage corresponds to one corresponding different storage space, and the public voltages correspond to different frame frequency ranges respectively. The sensing module is electrically connected with the display panel and the storage module and extracts and judges frame frequency from the display panel, and when the frame frequency is located within the first frame frequency range, the first public voltage corresponding to the first frame frequency range in the public voltages is output. When the frame frequency is located within the second frame frequency range, the second public voltage corresponding to the second frame frequency range in the public voltages is output. The display device can be suitable for the display mode of multiple kinds of frame frequency to eliminate the frame flashing phenomenon.
Description
Technical field
The present invention, about a kind of display device and method of adjustment thereof, particularly relates to a kind of display device and the method for adjustment thereof that reduce film flicker phenomenon.
Background technology
Liquid crystal indicator (Liquid Crystal Display; LCD) be now widely used a kind of flat-panel screens, it has, and external form be frivolous, the advantage such as power saving and Low emissivity.The principle of work of liquid crystal indicator is utilize the voltage difference changing liquid crystal layer two ends to change the ordered state of the liquid crystal molecule in liquid crystal layer, and in order to change the light transmission of liquid crystal layer, then the light source coordinating backlight module to provide is with show image.
Refer to Figure 1A and Figure 1B, shown in Figure 1A and Figure 1B, be respectively the schematic diagram of the waveform when gray scale voltage of display device is normal in prior art and time abnormal.When input one signal, when making the switching TFT of the pixel of display panels be ON, liquid crystal can store required gray scale voltage, corresponding common electric voltage (the Common Voltage of the voltage that gray scale voltage is provided by source electrode driver, Vcom) determine, that is display panels need one regulate after Vcom signal, for display panels provides a reference point.The gray scale voltage of the first period is V+ as shown in Figure 1A, and the gray scale voltage of the second period is that V-, V+ equal V-.By adjusting best Vcom, can not shake or shake minimum to reach picture, if but Vcom does not adjust, V+, V-then can be caused unequal, and as shown in Figure 1B, the gray scale voltage of the first period is V+ ', the gray scale voltage of the second period is V-', and V+ ' is not equal to V-', now float is large, has a strong impact on picture quality.
And in general, under normal pictures frequency 60Hz, best Vcom value can be adjusted for blinker pattern, picture is only shaken or shakes minimum.Be previously utilize variable resistor to adjust Vcom voltage, owing to being adjust manually, precisely adjustment and Data acquisition, are relatively not easily.Therefore all change at present and being adjusted by the mode of I2C (internal integrated circuit, Inter-Integrated Circuit) digital Vcom.Due to current customer demand SDRRS, (seamless display refreshing frequency switches, seamless Display Refresh Rate Switching) frame frequency be 40Hz and play film time frame frequency be then down to 48Hz, based on current AHVA(wide viewing angle, AdvancedHyper-Viewing Angle) characteristic, the Vcom value adjusted under frame frequency 60Hz basis uses under cannot be directly switch into frame frequency 48Hz/40Hz, adjust under the now corresponding non-frame frequency 48/40Hz of best Vcom value, therefore flicker level is very serious, cause the discomfort of human eye.In addition, when frequency reduces, the difference because of generating positive and negative voltage and common electric voltage produced different and causes the flicker level of picture different, also can cause the discomfort of human eye.
Therefore, how designing one can not affect the display device of brightness and flicker level when different display modes switches, thus improves the image quality of display device, is an industry problem demanding prompt solution for this reason.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of display device and method of adjustment thereof, and it can adapt to the display mode of multiple frame frequency, to improve film flicker phenomenon.
For reaching above-mentioned purpose, the invention provides a kind of display device, this display device comprises: display panel, in order to display frame; And public voltage generating circuit.Public voltage generating circuit comprises: store module, have multiple storage space, in order to store multiple common electric voltage respectively, and wherein each common electric voltage each different storage space corresponding, and the frame frequency scope that each common electric voltage is corresponding different; And sensing module, be electrically connected this display panel and this storage module, this sensing module captures the frame frequency of this picture from this display panel and judges this frame frequency, when this frame frequency is positioned at the first frame frequency scope, this sensing module export in the plurality of common electric voltage to should the first common electric voltage of the first frame frequency scope to this display panel; When this frame frequency is positioned at the second frame frequency scope, this sensing module export in the plurality of common electric voltage to should the second common electric voltage of the second frame frequency scope to this display panel.
As optional technical scheme, this sensing module comprises: sensing cell, this sensing cell is in order to capture and to judge this frame frequency, and when this frame frequency is positioned at the first frame frequency scope, determine the primary importance information of this first common electric voltage that this first frame frequency scope is corresponding and the storage space of this first common electric voltage in this storage module; When this frame frequency is positioned at the second frame frequency scope, determine the second place information of this second common electric voltage that this second frame frequency scope is corresponding and the storage space of this second common electric voltage in this storage module; And common electric voltage output unit, this storage module of this electric connection and this display panel, when this frame frequency is positioned at the first frame frequency scope, this common electric voltage output unit receives this primary importance information, and exports this first common electric voltage corresponding to this primary importance information to this display panel; When this frame frequency is positioned at the second frame frequency scope, this common electric voltage output unit receives this second place information, and exports this second common electric voltage corresponding to this second place information to this display panel.
As optional technical scheme, this sensing cell is Y type diode.
As optional technical scheme, this storage module is EEPROM (Electrically Erasable Programmable Read Only Memo).
As optional technical scheme, the plurality of common electric voltage writes each storage space of this storage module by clock signal and data-signal.
As optional technical scheme, this display device is liquid crystal indicator.
The present invention also provides a kind of method of adjustment of display device, and this method of adjustment comprises: store multiple common electric voltage in multiple storage space, and each common electric voltage each different storage space corresponding, the frame frequency scope that each common electric voltage is corresponding different; Capture and judge the frame frequency of display device; And when this frame frequency is positioned at the first frame frequency scope, export in the plurality of common electric voltage should the first common electric voltage of the first frame frequency scope; When this frame frequency is positioned at the second frame frequency scope, export in the plurality of common electric voltage should the second common electric voltage of the second frame frequency scope.
As optional technical scheme, this acquisition also judges the frame frequency of display device; And deserve this frame frequency when being positioned at the first frame frequency scope, export in the plurality of common electric voltage should the first common electric voltage of the first frame frequency scope; When this frame frequency is positioned at the second frame frequency scope, to export in the plurality of common electric voltage should the step of the second common electric voltage of the second frame frequency scope comprise: capture and judge this frame frequency, and when this frame frequency is positioned at the first frame frequency scope, determine the primary importance information of this first common electric voltage that this first frame frequency scope is corresponding and the storage space of this first common electric voltage in this storage module; When this frame frequency is positioned at the second frame frequency scope, determine the second place information of this second common electric voltage that this second frame frequency scope is corresponding and the storage space of this second common electric voltage in this storage module; And when this frame frequency is positioned at the first frame frequency scope, export this first common electric voltage to this display panel according to this primary importance information; When this frame frequency is positioned at the second frame frequency scope, export this second common electric voltage to this display panel according to this second place information.
As optional technical scheme, the plurality of common electric voltage writes each storage space by clock signal and data-signal.
As optional technical scheme, this display device is liquid crystal indicator.
Compared with prior art, storage module in display device of the present invention stores the Vcom of corresponding multiple different pictures frequency, frame frequency by detection display device exports the Vcom corresponding with this frame frequency, make display device under which kind of frame frequency, no matter all can tune to best Vcom, thus reduce or avoid film flicker phenomenon to occur, improve the display quality of display device.
Can be further understood by following detailed Description Of The Invention and institute's accompanying drawings about the advantages and spirit of the present invention.
Accompanying drawing explanation
The schematic diagram of the waveform when gray scale voltage of display device is normal in prior art and time abnormal is respectively shown in Figure 1A and Figure 1B;
Figure 2 shows that the block scheme according to display device of the present invention;
Figure 3 shows that the schematic diagram of the storage module according to the present invention;
Figure 4 shows that the block scheme of another embodiment according to display device of the present invention;
Figure 5 shows that the process flow diagram of the method for adjustment according to display device of the present invention.
Embodiment
The technology contents disclosed to make the application is more detailed and complete, and can refer to accompanying drawing and following various specific embodiment of the present invention, mark identical in accompanying drawing represents same or analogous assembly.But those of ordinary skill in the art should be appreciated that hereinafter provided embodiment is not used for limiting the scope that contains of the present invention.In addition, accompanying drawing, only for being schematically illustrated, is not drawn according to its life size.
About it " about " used herein, " approximately " or " roughly ", commonly the error of exponential quantity or scope, within 20 percent, are be then more preferably within 10 within 5 percent preferably.Wen Zhongruo is without clearly stating, and the numerical value mentioned by it all regards as approximate value, namely as " about ", " approximately " or the error represented by " roughly " or scope.
In addition, " couple " or " connection " about used herein it, all can refer to that two or more assembly directly makes entity or in electrical contact mutually, or mutually indirectly put into effect body or in electrical contact, and " coupling " also can refer to two or more assembly mutual operation or action.
Refer to Fig. 2, Figure 2 shows that the block scheme according to display device of the present invention.The invention provides a kind of display device 1, display device 1 is such as liquid crystal indicator, and comprise display panel 2 and public voltage generating circuit 3, display panel 2 is in order to display frame; Public voltage generating circuit 3 is electrically connected display panel 2.Public voltage generating circuit 3 comprises storage module 4 and sensing module 5, store module 4 and there is multiple storage space, in order to store multiple common electric voltage respectively, wherein each common electric voltage each different storage space corresponding, the frame frequency scope that each common electric voltage is corresponding different; Sensing module 5 is electrically connected display panel 2 and stores module 4, sensing module 5 captures the frame frequency of display frame from display panel 2 and judges this frame frequency, when this frame frequency is positioned at the first frame frequency scope, sensing module 5 exports the first common electric voltage of corresponding first frame frequency scope in this multiple common electric voltage to display panel 2; When this frame frequency is positioned at the second frame frequency scope, sensing module 5 to export in this multiple common electric voltage the second common electric voltage of this second frame frequency scope corresponding to display panel 2, thus reaches and present picture best image.Wherein storing module can be programmable (programmable) internal memory, be such as EEPROM (Electrically Erasable Programmable Read Only Memo) (electrically erasableprogrammable read only memory, or the internal memory of other type, but the present invention is not limited with above-mentioned EEPROM).
Refer to Fig. 3, Figure 3 shows that the schematic diagram of the storage module according to the present invention.For example, display device 1 has 40HZ, 48HZ and 60HZ tri-kinds of display modes, then when the frame frequency of current display frame is positioned at 35Hz-45Hz scope, sensing module 5 will acquisition store corresponding 35Hz-45Hz(such as the first frame frequency in module 4) the first common electric voltage, and export the first common electric voltage to display panel 2, wherein the first common electric voltage is arranged in the storage space 41 storing module 4; When the frame frequency of current display frame is positioned at 45Hz-55Hz scope, sensing module 5 will acquisition store corresponding 45Hz-45Hz(such as the second frame frequency in module 4) the second common electric voltage, and export the second common electric voltage to display panel 2, wherein the second common electric voltage is arranged in the storage space 42 storing module 4; When the frame frequency of current display frame is positioned at 55Hz-65Hz scope, sensing module 5 will acquisition store corresponding 55Hz-65Hz(such as the 3rd frame frequency in module 4) the 3rd common electric voltage, and export the 3rd common electric voltage to display panel 2, wherein the 3rd common electric voltage is arranged in the storage space 43 storing module 4.Namely there is under different pictures frequency like this corresponding common electric voltage, thus film flicker phenomenon is reduced or eliminated.
In other embodiment, store module 4 and can also select storage the 4th common electric voltage, the 5th common electric voltage ..., and depend on the quantity of the display mode that display device 1 has and determine, the present invention is not limited to the quantity that present embodiment exemplifies.
Wherein, above-mentioned multiple common electric voltage can utilize I2C serial data signal (SDA) and serial clock signal (SCL) write to store each storage space of module 4, such as by adjust under frame frequency 40Hz (or first common electric voltage (Vcom1) of correspondence is stored in storage space 41; By adjust under frame frequency 48Hz (or second common electric voltage (Vcom2) of correspondence is stored in storage space 42; By adjust under frame frequency 60Hz (or the 3rd common electric voltage (Vcom3) of correspondence is stored in storage space 43.
Display panel 2 has gate drivers, and common electric voltage output unit 7 is electrically connected at gate drivers 8, and the common electric voltage after above-mentioned adjustment i.e. the first common electric voltage exports gate drivers 8 to, and gate drivers 8 is connected to plurality of pixel electrodes.
Refer to Fig. 4, Figure 4 shows that the block scheme of another embodiment according to display device of the present invention.In present embodiment, sensing module 5 comprises sensing cell 6 and common electric voltage output unit 7.Sensing cell 6 is in order to capture and to judge this frame frequency, and when this frame frequency is positioned at the first frame frequency scope, determine the primary importance information of this first common electric voltage that this first frame frequency scope is corresponding and the storage space of this first common electric voltage in this storage module 4; When frame frequency is positioned at the second frame frequency scope, determine the second place information of this second common electric voltage that the second frame frequency scope is corresponding and the storage space of this second common electric voltage in this storage module 4.Common electric voltage output unit 7 is electrically connected and stores module 4 and display panel 2, when this frame frequency is positioned at the first frame frequency scope, common electric voltage output unit 7 receives this primary importance information, and exports this first common electric voltage corresponding to this primary importance information to display panel 2; When this frame frequency is positioned at the second frame frequency scope, common electric voltage output unit 7 receives this second place information, and exports this second common electric voltage corresponding to this second place information to display panel 2.Concrete, sensing cell 6 is such as Y type diode (YDIO).
Refer to Fig. 5, Figure 5 shows that the process flow diagram of the method for adjustment according to display device of the present invention.The present invention also provides a kind of method of adjustment of display device, and above-mentioned display device is such as liquid crystal indicator, and this method of adjustment comprises the following steps:
First as step S1: store multiple common electric voltage in multiple storage space, and each common electric voltage each storage space corresponding, the corresponding frame frequency scope of each common electric voltage;
Then as step S2: capture and judge the frame frequency of display device; And
Last as step S3: when this frame frequency is positioned at the first frame frequency scope, export in the plurality of common electric voltage should the first common electric voltage of the first frame frequency scope; When this frame frequency is positioned at the second frame frequency scope, export in the plurality of common electric voltage should the second common electric voltage of the second frame frequency scope.
Certainly, above-mentionedly " capture and judge the frame frequency of display device; And deserve this frame frequency when being positioned at the first frame frequency scope, export in the plurality of common electric voltage should the first common electric voltage of the first frame frequency scope; When this frame frequency is positioned at the second frame frequency scope, export in the plurality of common electric voltage should the second common electric voltage of the second frame frequency scope " step such as comprise the following steps:
Capture and judge this frame frequency, and when this frame frequency is positioned at the first frame frequency scope, determining the primary importance information of this first common electric voltage that this first frame frequency scope is corresponding and the storage space of this first common electric voltage in this storage module; When this frame frequency is positioned at the second frame frequency scope, determine the second place information of this second common electric voltage that this second frame frequency scope is corresponding and the storage space of this second common electric voltage in this storage module; And
When this frame frequency is positioned at the first frame frequency scope, export this first common electric voltage to this display panel according to this primary importance information; When this frame frequency is positioned at the second frame frequency scope, export this second common electric voltage to this display panel according to this second place information.
Wherein above-mentioned storage space is positioned at and stores on module, storing module can be such as programmable (programmable) internal memory, be such as EEPROM (Electrically Erasable Programmable Read Only Memo) (electrically erasableprogrammable read only memory, or the internal memory of other type, but the present invention is not limited with above-mentioned EEPROM).For example, display device has 40HZ, 48HZ and 60HZ tri-kinds of display modes, then when the frame frequency of current display frame is positioned at 35Hz-45Hz scope, sensing module will acquisition store corresponding 35Hz-45Hz(such as the first frame frequency in module) the first common electric voltage, and export the first common electric voltage to display panel, wherein the first common electric voltage is arranged in the storage space storing module; When the frame frequency of current display frame is positioned at 45Hz-55Hz scope, sensing module will acquisition store corresponding 45Hz-45Hz(such as the second frame frequency in module) the second common electric voltage, and export the second common electric voltage to display panel, wherein the second common electric voltage is arranged in the storage space storing module; When the frame frequency of current display frame is positioned at 55Hz-65Hz scope, sensing module will acquisition store corresponding 55Hz-65Hz(such as the 3rd frame frequency in module) the 3rd common electric voltage, and export the 3rd common electric voltage to display panel, wherein the 3rd common electric voltage is arranged in the storage space storing module 4.In other embodiment, store module and can also select storage the 4th common electric voltage, the 5th common electric voltage ..., and depend on the quantity of the display mode that display device 1 has and determine, the present invention is not limited to the quantity that present embodiment exemplifies.
Wherein, I2C(internal integrated circuit can be utilized, inter-integrated circuit) above-mentioned each common electric voltage write of corresponding different pictures frequency correspondence adjustment stores each storage space of module by interface through serial data signal (SDA) and serial clock signal (SCL).Such as (or correspondence) first common electric voltage (Vcom1) adjusted under frame frequency 40Hz is stored in storage space; (or correspondence) second common electric voltage (Vcom2) adjusted under frame frequency 48Hz is stored in storage space; (or correspondence) the 3rd common electric voltage (Vcom3) adjusted under frame frequency 60Hz is stored in storage space.
In sum, storage module in display device of the present invention stores the Vcom of corresponding multiple different pictures frequency, frame frequency by detection display device exports the Vcom corresponding with this frame frequency, make display device under which kind of frame frequency, no matter all can tune to best Vcom, thus reduce or avoid film flicker phenomenon to occur, improve the display quality of display device.
By the above detailed description of preferred embodiments, be wish clearly to describe feature of the present invention and spirit, and not with above-mentioned disclosed preferred embodiment, protection scope of the present invention limited.On the contrary, its objective is wish to contain various change and tool equality be arranged in the present invention institute in the protection domain of claim applied for.Therefore, the protection domain of the claim that the present invention applies for should do the broadest explanation, with the arrangement causing it to contain all possible change and tool equality according to above-mentioned explanation.
Claims (10)
1. a display device, is characterized in that this display device comprises:
Display panel, in order to display frame; And
Public voltage generating circuit, comprising:
Store module, there is multiple storage space, in order to store multiple common electric voltage respectively, wherein each common electric voltage each different storage space corresponding, and the frame frequency scope that each common electric voltage is corresponding different; And
Sensing module, be electrically connected this display panel and this storage module, this sensing module captures the frame frequency of this picture from this display panel and judges this frame frequency, when this frame frequency is positioned at the first frame frequency scope, this sensing module export in the plurality of common electric voltage to should the first common electric voltage of the first frame frequency scope to this display panel; When this frame frequency is positioned at the second frame frequency scope, this sensing module export in the plurality of common electric voltage to should the second common electric voltage of the second frame frequency scope to this display panel.
2. display device as claimed in claim 1, is characterized in that this sensing module comprises:
Sensing cell, this sensing cell is in order to capture and to judge this frame frequency, and when this frame frequency is positioned at the first frame frequency scope, determine the primary importance information of this first common electric voltage that this first frame frequency scope is corresponding and the storage space of this first common electric voltage in this storage module; When this frame frequency is positioned at the second frame frequency scope, determine the second place information of this second common electric voltage that this second frame frequency scope is corresponding and the storage space of this second common electric voltage in this storage module; And
Common electric voltage output unit, this storage module of this electric connection and this display panel, when this frame frequency is positioned at the first frame frequency scope, this common electric voltage output unit receives this primary importance information, and exports this first common electric voltage corresponding to this primary importance information to this display panel; When this frame frequency is positioned at the second frame frequency scope, this common electric voltage output unit receives this second place information, and exports this second common electric voltage corresponding to this second place information to this display panel.
3. display device as claimed in claim 2, is characterized in that this sensing cell is Y type diode.
4. display device as claimed in claim 1, is characterized in that this storage module is EEPROM (Electrically Erasable Programmable Read Only Memo).
5. display device as claimed in claim 1, is characterized in that the plurality of common electric voltage writes each storage space of this storage module by clock signal and data-signal.
6. display device as claimed in claim 1, is characterized in that this display device is liquid crystal indicator.
7. a method of adjustment for display device, is characterized in that this method of adjustment comprises:
Store multiple common electric voltage in multiple storage space, and each common electric voltage each different storage space corresponding, the frame frequency scope that each common electric voltage is corresponding different;
Capture and judge the frame frequency of display device; And
When this frame frequency is positioned at the first frame frequency scope, export in the plurality of common electric voltage should the first common electric voltage of the first frame frequency scope; When this frame frequency is positioned at the second frame frequency scope, export in the plurality of common electric voltage should the second common electric voltage of the second frame frequency scope.
8. the method for adjustment of display device as claimed in claim 7, is characterized in that this acquisition and judges the frame frequency of display device; And deserve this frame frequency when being positioned at the first frame frequency scope, export in the plurality of common electric voltage should the first common electric voltage of the first frame frequency scope; When this frame frequency is positioned at the second frame frequency scope, to export in the plurality of common electric voltage should the step of the second common electric voltage of the second frame frequency scope comprise:
Capture and judge this frame frequency, and when this frame frequency is positioned at the first frame frequency scope, determining the primary importance information of this first common electric voltage that this first frame frequency scope is corresponding and the storage space of this first common electric voltage in this storage module; When this frame frequency is positioned at the second frame frequency scope, determine the second place information of this second common electric voltage that this second frame frequency scope is corresponding and the storage space of this second common electric voltage in this storage module; And
When this frame frequency is positioned at the first frame frequency scope, export this first common electric voltage to this display panel according to this primary importance information; When this frame frequency is positioned at the second frame frequency scope, export this second common electric voltage to this display panel according to this second place information.
9. the method for adjustment of display device as claimed in claim 7, is characterized in that the plurality of common electric voltage writes each storage space by clock signal and data-signal.
10. the method for adjustment of display device as claimed in claim 7, is characterized in that this display device is liquid crystal indicator.
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| CN104809991A (en) * | 2015-04-03 | 2015-07-29 | 深圳市金立通信设备有限公司 | Method for determining reference voltage of display screen |
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| CN107464540A (en) * | 2017-09-26 | 2017-12-12 | 京东方科技集团股份有限公司 | Liquid crystal display, display panel and its VCOM voltage control methods and device |
| US10706797B2 (en) | 2017-09-26 | 2020-07-07 | Boe Technology Group Co., Ltd. | Liquid crystal display, display panel and reference voltage control method and device |
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| CN111063288A (en) * | 2019-12-23 | 2020-04-24 | 深圳市华星光电半导体显示技术有限公司 | Driving method and driving device of display panel |
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| US11961440B2 (en) | 2021-09-23 | 2024-04-16 | HKC Corporation Limited | Method for driving display device, and display device |
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