CN101458914A - Panel driving apparatus and method, and liquid crystal display - Google Patents
Panel driving apparatus and method, and liquid crystal display Download PDFInfo
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- CN101458914A CN101458914A CNA200910002627XA CN200910002627A CN101458914A CN 101458914 A CN101458914 A CN 101458914A CN A200910002627X A CNA200910002627X A CN A200910002627XA CN 200910002627 A CN200910002627 A CN 200910002627A CN 101458914 A CN101458914 A CN 101458914A
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Abstract
The invention relates to a panel drive device, a method thereof and a liquid crystal display. The panel drive device comprises a time sequence controller, a gamma voltage generation unit and a source cathode driver, wherein the time sequence controller at least provides one data signal, the gamma voltage generation unit at least provides two gamma reference voltages, the source cathode driver is coupled with the time sequence controller and the gamma voltage generation unit and is controlled by the time sequence controller for receiving the data signal and the two gamma reference voltages and projecting two drive signals from the two gamma reference voltages according to the data signal to drive at least one pixel of a panel. The invention mixes the color of higher gray scale and the color of lower gray scale into a color of intermediate gray scale, therefore, users can watch the image of adjacent color tones, when users watch the image displayed on a liquid crystal display via front view or inclined view.
Description
Technical field
The present invention relates to a kind of plane display technique, relate in particular to a kind of board driving mchanism and the method that can improve LCD generation colour cast (color washout).
Background technology
Along with photoelectricity and development of semiconductor, driven the flourish of flat-panel screens, and in many flat-panel screens, LCD is because because of having advantageous characteristic such as high spatial utilization ratio, low consumpting power, radiationless and low electromagnetic interference (EMI), thereby becomes the main flow in market.At present, market is towards the development of characteristics such as height contrast, rapid reaction and wide viewing angle for the performance requirement of LCD, and the technology that can reach the wide viewing angle requirement at present for example includes multi-zone vertical alignment nematic (MVA), multiple domain horizontal direction matching (MHA), twisted nematic and adds the visual angle and enlarge film (TN+film) and transverse electric field form (IPS).
Though can reach the purpose of wide viewing angle by the LCD of above-mentioned listed technology, its existing colour cast (color washout) phenomenon also is for This is what people generally disapprove of.Generally speaking, so-called colour cast refer to when the user with the different angles of viewing and admiring when watching the shown image frame of LCD, it can see the image frame of different color contrast.For instance, if the user stands in the angle of deflection comparatively (for example 60 degree) when watching the shown image frame of LCD, the color contrast of the image frame that it is seen can be partially in vain in the color contrast that stands in the image frame that the angle faced (that is 90 spend) seen.
Summary of the invention
In view of this, the invention provides a kind of board driving mchanism and method, it can improve the colour cast (color washout) that LCD produces.
The invention provides a kind of board driving mchanism, it comprises time schedule controller, gamma voltage generation unit, and source electrode driver.Wherein, time schedule controller is in order to provide a data-signal at least, and the gamma voltage generation unit is then in order to provide two groups of gamma reference voltages at least.Source electrode driver couples time schedule controller and gamma voltage generation unit, and be controlled by time schedule controller, in order to receive described data-signal and described two groups of gamma reference voltages, and according to described data-signal and in described two groups of gamma reference voltages, map out two drive signals, so as to driving at least one pixel in the panel.
In one embodiment of the invention, have two sub-pixels in the described pixel at least, and described two sub-pixels are unlocked by same sweep signal, and respectively by described two drive.
In one embodiment of the invention, described gamma voltage generation unit comprises first resistance string and second resistance string.Wherein, described first resistance string can be coupled between a system voltage and the reference voltage, and is made up of a plurality of first variable resistors, in order to wherein a group of described two groups of gamma reference voltages to be provided.Described second resistance string also is coupled between described system voltage and the described reference voltage, and is made up of a plurality of the second adjustable resistance, in order to wherein another group of described two groups of gamma reference voltages to be provided.
The present invention provides a kind of panel driving method in addition, and it comprises: at first, provide a data-signal and two groups of gamma reference voltages.Then, in described two groups of gamma reference voltages, map out at least two drive signals according to described data-signal, so as to driving at least one pixel in this panel.
In one embodiment of the invention, before driving described pixel, panel driving method provided by the present invention also comprises provides the one scan signal to open at least two sub-pixels in the described pixel simultaneously.Wherein, described two sub-pixels are respectively by described two drive.
In an embodiment of the invention described above, described two groups of gamma reference voltages are identical or different.
In an embodiment of the invention described above, described two drive signals are identical or different driving polarity.
The present invention provides a kind of LCD with board driving mchanism that the invention described above proposes in addition.
Board driving mchanism proposed by the invention and method are mainly used in the panel of the dot structure (for example 2D1G) with subregion.Board driving mchanism proposed by the invention and method can independently provide two groups of different gamma reference voltages (gamma reference voltage) of person to use to source electrode driver.
Thus, when time schedule controller provides a stroke count number of it is believed that to source electrode driver, source electrode driver can map out two according to this stroke count number of it is believed that and drive opposite polarity drive signal in described two groups of gamma reference voltages, to drive two sub-pixels in the pixel respectively, and allow described two sub-pixels wherein one show color of higher gray scale, and allow another sub-pixel show the color of low GTG.Whereby, with color of higher gray scale and be mixed into the color of GTG in the middle of than the color that hangs down GTG after, though can make the user from face or with the angle that tilts when watching the shown image frame of LCD, all can watch the image frame of close color contrast.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, at least one embodiment of the present invention cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is depicted as the system block diagram of the LCD of one embodiment of the invention.
Fig. 2 is depicted as the partial pixel array synoptic diagram of the panel of one embodiment of the invention.
Fig. 3 is depicted as the circuit diagram of the gamma voltage generation unit of one embodiment of the invention.
Fig. 4 is depicted as the process flow diagram of the panel driving method of one embodiment of the invention.
And the description of reference numerals in the above-mentioned accompanying drawing is as follows:
100: LCD
101: panel
103: gate drivers
105: source electrode driver
107: time schedule controller
109: the gamma voltage generation unit
111: backlight module
Pix: pixel
M: boss's pixel
S: inferior sub-pixel
Dn～Dn+3: data line
Gn, Gn+1: sweep trace
+/-: drive polarity
STV: initial pulse
DS: data-signal
GA1～GAn, GB1～GBn: gamma reference voltage
VDDA: the system voltage of panel
RA1～RAn, RB1～RBn: variable resistor
S401～S403: each step of the process flow diagram of the panel driving method of one embodiment of the invention
Embodiment
The technology effect that the present invention will reach is in order to improve the colour cast (colorwashout) that LCD produces.And following content will encyclopaedize to those skilled in the relevant art of the present invention at technological means of the present invention and effect and consider and examine.
Fig. 1 is depicted as the system block diagram of the LCD of one embodiment of the invention.Fig. 2 is depicted as the partial pixel array synoptic diagram of the panel of one embodiment of the invention.Please merge with reference to Fig. 1 and Fig. 2, LCD (LCD) 100 comprises panel (display panel) 101, gate drivers (gate driver) 103, source electrode driver (source driver) 105, time schedule controller (timing controller) 107, gamma voltage generation unit 109, and backlight module (backlight module) 111.Wherein, source electrode driver 105, time schedule controller 107 and gamma voltage generation unit 109 constitute board driving mchanism of the present invention.
In present embodiment, panel 101 has a plurality of pixel Pix that form with the array way arrangement, and each pixel Pix is distinguished into two zones.Wherein a district is boss's pixel (main sub-pixel) M, and another district is time sub-pixel (sub sub-pixel) S.What deserves to be mentioned is earlier in this, have with field of the present invention and know that usually the knowledgeable should know after finishing watching graphic that Fig. 2 disclosed, present embodiment adopts dot structure with subregion (2D1G for example, wherein D refers to data line Dn～Dn+3, and G refers to sweep trace Gn, Gn+1) panel 101, but the present invention is not restricted to this, and the number of data line and sweep trace can change arbitrarily according to the actual design demand.
Gamma voltage generation unit 109 is in order to provide two groups of gamma reference voltage GA1～GAn, GB1～GBn at least.Fig. 3 is depicted as the circuit diagram of the gamma voltage generation unit of one embodiment of the invention.Please merge with reference to Fig. 1～Fig. 3, gamma voltage generation unit 109 comprises first resistance string 301 and the second electricity group string 303.Wherein, first resistance string 301 is coupled between the system voltage VDDA and reference voltage (for example being earthing potential) of panel 101, and RA1～RAn is formed by a plurality of first variable resistors (variable resistance), in order to one group of gamma reference voltage GA1～GAn to be provided.In addition, second resistance string 303 also is coupled between described system voltage VDDA and the reference voltage, and is made up of a plurality of the second adjustable resistance RB1～RBn, in order to another group gamma reference voltage GB1～GBn to be provided.
Based on above-mentioned, in order to allow the same stroke count number of it is believed that DS in two groups of gamma reference voltage GA1～GAn, GB1～GBn, map out two drive signals, to drive the boss's pixel M and time sub-pixel S among the pixel Pix respectively with different driving polarity.Present embodiment only need according to voltage divider principle with the ratio between the resistance of the variable resistor RA1～RAn of the first variable resistor string adjust with different the getting final product of ratio of the resistance of the variable resistor RB1～RBn of each the second adjustable resistance string, thereby make described two groups of gamma reference voltage GA1～GAn, GB1～GBn difference.
In other words, present embodiment mainly is by adjusting the resistance of each first variable resistor RA1～RAn and each the second adjustable resistance RB1～RBn, can mapping out two drive signals with different driving polarity to cause the same stroke count number of it is believed that DS in two groups of gamma reference voltage GA1～GAn, GB1～GBn.
In addition, in present embodiment, one of them can show color of higher gray scale boss's pixel M among the same pixel Pix and time sub-pixel S, and another can show the color of low GTG.Thus, with color of higher gray scale and be mixed into the color of GTG in the middle of than the color that hangs down GTG after, though can make the user from face or with the angle that tilts when watching the shown image frame of LCD 100, all can watch the image frame of close color contrast.
Yet, in other embodiments of the invention, when panel 101 non-for adopting when having the dot structure of subregion, the user can be identical with the resistance with each the second adjustable resistance RB1～RBn that the resistance of each first variable resistor RA1～RAn is adjusted, thereby make that described two groups of gamma reference voltage GA1～GAn, GB1～GBn are identical.Thus, the polarity of two drive signals that the same stroke count number of it is believed that DS is mapped out in two groups of gamma reference voltage GA1～GAn, GB1～GBn will be identical, to such an extent as to board driving mchanism proposed by the invention can be applied to have the panel of the dot structure of subregion or case of non-partitioned simultaneously, thereby meet the versatility of design.
Fig. 4 is depicted as the process flow diagram of the panel driving method of one embodiment of the invention.Please refer to Fig. 4, it comprises the panel driving method of present embodiment: at first, as described in step S401, provide a data-signal and two groups of gamma reference voltages.Then, as described in step S403, in described two groups of gamma reference voltages, map out at least two drive signals, so as to driving at least one pixel in the panel according to described data-signal.
In present embodiment, before driving described pixel, the panel driving method of present embodiment also comprises provides the one scan signal to open at least two sub-pixels in the described pixel simultaneously, drives described two sub-pixels respectively so as to causing described two drive signals.And what deserves to be mentioned is at this, when panel has the dot structure of subregion for adopting, described two groups of gamma reference voltages are different, and described two drive signals can be different driving polarity, but when panel non-for adopting when having the dot structure of subregion, described two groups of gamma reference voltages are identical, and described two drive signals also are identical driving polarity.
In sum, board driving mchanism and method proposed by the invention are mainly used in the panel of the dot structure (for example 2D1G) with subregion.Board driving mchanism proposed by the invention and method can independently provide two groups of different gamma reference voltages (gamma reference voltage) of person to use to source electrode driver.
Thus, when time schedule controller provides a stroke count number of it is believed that to source electrode driver, source electrode driver can map out at least two according to this stroke count number of it is believed that and drive opposite polarity drive signal in described two groups of gamma reference voltages, to drive two sub-pixels in the pixel respectively, and allow described two sub-pixels one of them show color of higher gray scale, and allow another sub-pixel show the color of low GTG.Whereby, with color of higher gray scale and be mixed into the color of GTG in the middle of than the color that hangs down GTG after, though can make the user from face or with the angle that tilts when watching the shown image frame of LCD, all can watch the image frame of close color contrast.
Certainly, based on the above-mentioned content that discloses also as can be known, board driving mchanism proposed by the invention and method also can be applicable to have in the panel of dot structure of case of non-partitioned.Thus, when time schedule controller provides a stroke count number of it is believed that to source electrode driver, source electrode driver can map out two according to this stroke count number of it is believed that and drive the identical drive signal of polarity in described two groups of gamma reference voltages, to drive two sub-pixels in the pixel respectively, so as to satisfying the versatility of design.
Though the present invention discloses as above with a plurality of embodiment; right its is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.
Claims (11)
1. board driving mchanism comprises:
Time schedule controller is in order to provide a data-signal at least;
One gamma voltage generation unit is in order to provide two groups of gamma reference voltages at least; And
The one source pole driver, couple this time schedule controller and this gamma voltage generation unit, and be controlled by this time schedule controller, in order to receive this data-signal and described two groups of gamma reference voltages, and in described two groups of gamma reference voltages, map out two drive signals according to this data-signal, so as to driving at least one pixel in this panel.
2. board driving mchanism as claimed in claim 1 wherein has two sub-pixels at least in this pixel, and described two sub-pixels are unlocked by same sweep signal, and respectively by described two drive.
3. board driving mchanism as claimed in claim 2, wherein this gamma voltage generation unit comprises:
One first resistance string is coupled to and unifies between a voltage and the reference voltage, and is made up of a plurality of first variable resistors, in order to wherein a group of described two groups of gamma reference voltages to be provided; And
One second resistance string is coupled between this system voltage and this reference voltage, and is made up of a plurality of the second adjustable resistance, in order to wherein another group of described two groups of gamma reference voltages to be provided.
4. board driving mchanism as claimed in claim 3, wherein said two groups of gamma reference voltages are different.
5. board driving mchanism as claimed in claim 3, wherein said two drive signals are different driving polarity.
6. LCD with board driving mchanism as claimed in claim 1.
7. panel driving method comprises:
One data-signal and two groups of gamma reference voltages are provided; And
In described two groups of gamma reference voltages, map out at least two drive signals according to this data-signal, so as to driving at least one pixel in this panel.
8. panel driving method as claimed in claim 7 wherein before driving this pixel, also comprises providing the one scan signal to open at least two sub-pixels in this pixel simultaneously.
9. panel driving method as claimed in claim 8, wherein said two sub-pixels are respectively by described two drive.
10. panel driving method as claimed in claim 7, wherein said two groups of gamma reference voltages are different.
11. panel driving method as claimed in claim 7, wherein said two drive signals are different driving polarity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910002627XA CN101458914B (en) | 2009-01-09 | 2009-01-09 | Panel driving apparatus and method, and liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910002627XA CN101458914B (en) | 2009-01-09 | 2009-01-09 | Panel driving apparatus and method, and liquid crystal display |
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| CN101458914A true CN101458914A (en) | 2009-06-17 |
| CN101458914B CN101458914B (en) | 2011-11-23 |
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| CN101968945A (en) * | 2009-07-16 | 2011-02-09 | 三星电子株式会社 | Source driver and display apparatus comprising the same |
| CN101976542A (en) * | 2010-11-10 | 2011-02-16 | 友达光电股份有限公司 | Pixel driving circuit |
| CN102347005A (en) * | 2010-07-30 | 2012-02-08 | 奇美电子股份有限公司 | Image adjusting method and device |
| CN103745685A (en) * | 2013-11-29 | 2014-04-23 | 深圳市华星光电技术有限公司 | Active matrix type organic light-emitting diode panel drive circuit and drive method |
| CN104157254A (en) * | 2014-08-18 | 2014-11-19 | 深圳市华星光电技术有限公司 | Gamma voltage generating module and liquid crystal panel |
| CN104167194A (en) * | 2014-08-18 | 2014-11-26 | 深圳市华星光电技术有限公司 | Liquid crystal display panel gray-scale value setting method and liquid crystal display |
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| CN106023918A (en) * | 2016-06-30 | 2016-10-12 | 深圳市华星光电技术有限公司 | Liquid crystal display and data driver thereof |
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- 2009-01-09 CN CN200910002627XA patent/CN101458914B/en active Active
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| US9117416B2 (en) | 2009-12-17 | 2015-08-25 | Au Optronics Corp. | Active matrix display device with pixel charging time extending function |
| CN102347005A (en) * | 2010-07-30 | 2012-02-08 | 奇美电子股份有限公司 | Image adjusting method and device |
| CN101976542A (en) * | 2010-11-10 | 2011-02-16 | 友达光电股份有限公司 | Pixel driving circuit |
| CN103745685B (en) * | 2013-11-29 | 2015-11-04 | 深圳市华星光电技术有限公司 | Active matric organic LED panel driving circuit and driving method |
| CN103745685A (en) * | 2013-11-29 | 2014-04-23 | 深圳市华星光电技术有限公司 | Active matrix type organic light-emitting diode panel drive circuit and drive method |
| CN104167194A (en) * | 2014-08-18 | 2014-11-26 | 深圳市华星光电技术有限公司 | Liquid crystal display panel gray-scale value setting method and liquid crystal display |
| CN104157254A (en) * | 2014-08-18 | 2014-11-19 | 深圳市华星光电技术有限公司 | Gamma voltage generating module and liquid crystal panel |
| JP2017530391A (en) * | 2014-08-18 | 2017-10-12 | 深▲セン▼市華星光電技術有限公司 | Gamma voltage generation module and liquid crystal panel |
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| CN104167194B (en) * | 2014-08-18 | 2017-04-26 | 深圳市华星光电技术有限公司 | Liquid crystal display panel gray-scale value setting method and liquid crystal display |
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| CN104317084A (en) * | 2014-11-07 | 2015-01-28 | 深圳市华星光电技术有限公司 | Liquid crystal panel and driving method thereof |
| CN104317084B (en) * | 2014-11-07 | 2017-05-17 | 深圳市华星光电技术有限公司 | Liquid crystal panel and driving method thereof |
| CN106507000A (en) * | 2015-09-03 | 2017-03-15 | 豪威科技股份有限公司 | Pixel control circuit and imaging system |
| CN106507000B (en) * | 2015-09-03 | 2019-04-02 | 豪威科技股份有限公司 | Pixel control circuit and imaging system |
| WO2017211007A1 (en) * | 2016-06-07 | 2017-12-14 | 深圳市华星光电技术有限公司 | Liquid crystal display and method for improving colour shift of liquid crystal display |
| CN106023918B (en) * | 2016-06-30 | 2018-10-30 | 深圳市华星光电技术有限公司 | Liquid crystal display and its data driver |
| US10311821B2 (en) | 2016-06-30 | 2019-06-04 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Data driver of liquid crystal display having two individually regulable gamma voltages |
| CN106023918A (en) * | 2016-06-30 | 2016-10-12 | 深圳市华星光电技术有限公司 | Liquid crystal display and data driver thereof |
| WO2018113248A1 (en) * | 2016-12-20 | 2018-06-28 | 惠科股份有限公司 | Display device and method for driving display panel thereof |
| WO2018113615A1 (en) * | 2016-12-20 | 2018-06-28 | 惠科股份有限公司 | Liquid crystal display device and driving method therefor |
| CN109637476A (en) * | 2019-01-08 | 2019-04-16 | 京东方科技集团股份有限公司 | Display methods, display panel, the display device of display panel |
| CN110379396A (en) * | 2019-06-17 | 2019-10-25 | 北京集创北方科技股份有限公司 | Gamma electric voltage production method, generation circuit, source electrode drive circuit, driving chip and display device |
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