CN1690818A - Pixel structure having multiple memory capacitors and display panel - Google Patents
Pixel structure having multiple memory capacitors and display panel Download PDFInfo
- Publication number
- CN1690818A CN1690818A CN 200410034711 CN200410034711A CN1690818A CN 1690818 A CN1690818 A CN 1690818A CN 200410034711 CN200410034711 CN 200410034711 CN 200410034711 A CN200410034711 A CN 200410034711A CN 1690818 A CN1690818 A CN 1690818A
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- storage capacitors
- reservior capacitor
- display panel
- less important
- transistor
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- 239000003990 capacitor Substances 0.000 title claims abstract description 92
- 238000000502 dialysis Methods 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 31
- 238000010586 diagram Methods 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 239000010408 film Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a pixel structure and display panel with multiple memory capacitors. The pixel structure comprises a display unit with a transistor, a transistor connected to main memory capacitor and capacitor supply device with one or more secondary memory capacitors; according to drive frequency corresponding to display, parallel secondary memory capacitors to main memory capacitor selectively.
Description
Technical field
The invention relates to a kind of pixel structure, particularly relevant for a kind of pixel structure and display panel that can under the low frequency state, reduce flicker.
Background technology
LCD (1iquid crystal display, LCD) be a kind of flat-panel screens that is widely used most at present, have features such as low consumption electric power, slim light weight and low voltage drive, its displaying principle is to utilize the material behavior of liquid crystal molecule, the ordered state of liquid crystal molecule is changed, cause liquid crystal material to produce various photoelectric effect.
Generally speaking, the viewing area of LCD comprises a plurality of pixel areas, a pixel area is meant by sweep trace (scan line) and the defined rectangular area of data line (data line), be provided with a thin film transistor (TFT) (thin film transistor in it, hereinafter to be referred as TFT) an and pixel capacitors, and be commonly referred to as Thin Film Transistor-LCD (TFT-LCD) element as the LCD of on-off element (switching device) with TFT.
Please refer to Fig. 1, Fig. 1 shows known panel configuration synoptic diagram.Panel 100 has an active-matrix zone 101, one scan driver 102 at least, reaches a data driver 103.Active-matrix zone 101 has a plurality of pixel 101a; Scanner driver 102 is in order to activate the pixel in the active-matrix zone 101 in order; And data driver 103 in order to outputting data signals to corresponding pixel 101a; Wherein, scanner driver 102 couples with sweep trace (scan line) SL with pixel 101a; Data driver 103 couples with data line (data line) DL and pixel 101a.
Please refer to Fig. 2, Fig. 2 is the synoptic diagram that shows single pixel 101a shown in Figure 1.Pixel 101a includes a transistor T
11, a liquid crystal display capacitor C
LC-11, an and storage capacitors C
ST-11When the one scan electrode of scanner driver 102 entered selected state, the pixel 101a that couples with it can conducting, and just pixel 101a can be applied in an accurate V of data that represent monochrome information
DC1And shinny, at this moment, liquid crystal display voltage V
LC1Meeting is the accurate position of data V therewith
DC1Unanimity, and storage capacitors C
ST-11Can be recharged.When the scan electrode of this scanner driver 102 entered nonselection mode, the pixel 101a that couples with it can be by electrical isolation, and the liquid crystal display capacitor C
LC-11Then by the storage capacitors C of previous charging
ST-11Power supply is with stabilizing liquid crystal display voltage V
LC1And make pixel 101a maintain shinny state.
Please refer to Fig. 3 a～3b, Fig. 3 a shows V shown in Figure 2
DC1With V
LC1Clock pulse graph of a relation under general frequency; Fig. 3 b shows V shown in Figure 2
DC1With V
LC1Clock pulse graph of a relation under lower frequency.
As pixel 101a during at nonselection mode, though liquid crystal display voltage V
LC1Can be by storage capacitors C
ST-11Stably keep, but still can be because of causes such as the consumption of pixel itself or peripheral element or electric leakage have a little power loss, so before charging next time, liquid crystal display voltage V
LC1Can be from the noble potential current potential △ V that descends
1
Under general driving frequency, for example about 60Hz, since charge frequency cause faster, liquid crystal display voltage V
LC1Deduct decline current potential △ V from noble potential
1Get back to V
LC1The process of current potential be difficult for being found by the user; Yet under battery saving modes such as holding state, its driving frequency is the following low driving frequency of a 40Hz, and the time of each charging room can be extended, and makes electric weight continue to run off, and causes liquid crystal display voltage V
LC1Can suppression ratio decline current potential △ V before charging next time
1More current potential △ V
1', shown in Fig. 3 b.Liquid crystal display voltage V
LC1Current potential descend manyly more, the voltage variety during charging is just big more, then easy more being discovered by the user and feel film flicker.
Summary of the invention
The object of the present invention is to provide a kind of pixel structure with multiple storage capacitors, mainly is to reduce the potential difference (PD) that produces because of electric leakage by the combination that increases at least one switching transistor and storage capacitors in each single pixel.
According to above-mentioned purpose, the invention provides a kind of pixel structure with multiple storage capacitors, comprising: a display unit, have a transistor, a main reservior capacitor couples transistor; And an electric capacity feedway, having a less important reservior capacitor and an on-off element, less important reservior capacitor and on-off element couple, and see through the conducting of on-off element, and less important reservior capacitor is connected in parallel to main reservior capacitor.
Another object of the present invention is to provide a kind of display panel under the low frequency state, to produce flicker to reduce panel with multiple storage capacitors pixel structure.
According to above-mentioned purpose, the invention provides a kind of display panel, under one first pattern and one second pattern, can reduce scintillation, comprising: plural sweep trace; The complex data line; And plural pixel structure, be provided with corresponding to each staggered place of sweep trace and data line, wherein, each pixel structure comprises: a display unit, have a transistor, a main storage capacitors couples transistor; And an electric capacity feedway, having a less important reservior capacitor, a wherein less important reservior capacitor and an on-off element couple; Wherein, display panel running via the conducting of on-off element, optionally is connected in parallel to main reservior capacitor with less important reservior capacitor in one first pattern following time.
Description of drawings
Fig. 1 shows known panel configuration synoptic diagram;
Fig. 2 is the synoptic diagram that shows single pixel 101a shown in Figure 1;
Fig. 3 a shows V shown in Figure 2
DC1With V
LC1Clock pulse graph of a relation under general frequency;
Fig. 3 b shows V shown in Figure 2
DC1With V
LC1Clock pulse graph of a relation under lower frequency;
Fig. 4 shows panel configuration synoptic diagram of the present invention;
Fig. 5 a is the structure that shows the pixel 401a with multiple storage capacitors shown in Figure 4;
Fig. 5 b is an embodiment who shows pixel structure of the present invention;
Fig. 6 a is the V shown in the displayed map 5b
DC2With V
LC2Clock pulse graph of a relation under general frequency;
Fig. 6 b is the V shown in the displayed map 5b
DC2With V
LC2Clock pulse graph of a relation under lower frequency;
Fig. 7 a is the storage capacitors C shown in the displayed map 5b
ST-21With storage capacitors C
ST-22Synoptic diagram opens circuit;
Fig. 7 b is the storage capacitors C shown in the displayed map 5b
ST-21With storage capacitors C
ST-22Synoptic diagram in parallel.
Symbol description:
100～panel
101～active-matrix zone
102～scanner driver
103～data driver
101a～pixel
SL～sweep trace
DL～data line
T
11～transistor
C
LC-11～liquid crystal display electric capacity
C
ST-11～storage capacitors
V
DC1～voltage
V
LC1～liquid crystal display voltage
△ V
1, △ V
1～current potential
400～panel
401～active-matrix zone
402～scanner driver
403～data driver
404～circuit controller
401a～pixel
SL～sweep trace
DL～data line
CL～control line
411,811～display unit
412,812,812N～electric capacity feedway
T
21～transistor
C
LC-21～liquid crystal display electric capacity
C
ST-21～storage capacitors
T
22～transistor
C
ST-22～storage capacitors
CL
1～control line
CL
2～control line
V
DC2～voltage
V
LC2～liquid crystal display voltage
C
ST-21～storage capacitors
△ V
2, △ V
2～current potential
Embodiment
Please refer to Fig. 4, Fig. 4 shows panel configuration synoptic diagram of the present invention.Panel 400 has an active-matrix zone 401, one scan driver 402, a data driver 403 at least, reaches a circuit controller 404.Panel 400 can be any panel, for example is the LCD panel; Active-matrix zone 401 has a plurality of pixel 401a, and pixel 401a has a plurality of storage capacitors; Scanner driver 402 couples with sweep trace (scan line) SL and circuit controller 404, and scanner driver 402 is in order to activate the pixel in the active-matrix zone 401 in order; Data driver 403, couples with data line (data line) DL and pixel 401a to corresponding pixel 401a in order to outputting data signals; Circuit controller 404 is connected with pixel 401a with control line CL, and circuit controller 404 can decide the activation quantity of the storage capacitors among the pixel 401a according to the transmission frequency of sweep trace SL.
Please also refer to Fig. 5 a, Fig. 5 b and Fig. 6 a～6b, Fig. 5 a is the structure that shows the pixel 401a with multiple storage capacitors shown in Figure 4, and Fig. 5 b is an embodiment who shows pixel structure of the present invention, and Fig. 6 a is the V shown in the displayed map 5b
DC2With V
LC2Clock pulse graph of a relation under general frequency; Fig. 6 b is the V shown in the displayed map 5b
DC2With V
LC2Clock pulse graph of a relation under lower frequency.
Please refer to Fig. 5 a, the pixel 401a with multiple storage capacitors includes a display unit 411 and an electric capacity feedway 412a.Wherein, display unit 411 comprises a transistor T
21, a liquid crystal display capacitor C
LC-21, an and storage capacitors C
ST-21, transistor T
21And between the circuit controller 404 with a control line CL
1Couple.Electric capacity feedway 412a comprises at least one storage capacitors C
ST-22To C
ST-N, each storage capacitors couples an on-off element, and on-off element for example is a transistor T
22To T
N, transistor T
22To T
NBetween be one another in series, and respectively via control line CL
2To CL
NCouple with circuit controller 404.
Be the invention that embodiment is described in detail this case below with the described pixel of Fig. 5 b with multiple storage capacitors.
At first, provide a pixel 401a, pixel 401a includes a display unit 411 and an electric capacity feedway 412b; Wherein, display unit 411 comprises a transistor T
21, a liquid crystal display capacitor C
LC-21, an and storage capacitors C
ST-21Electric capacity feedway 412b comprises a transistor T
32An and storage capacitors C
ST-32Transistor T
21And between the circuit controller 404 with a control line CL
1Couple, and transistor T
32And between circuit controller 404 with a control line CL
2Couple.
Under general driving frequency, for example be 60Hz, when the one scan electrode of scanner driver 402 enters selected state, by control line CL
1The display unit that couples with it 411 can conductings, and just display unit 411 can be applied in an accurate V of data that represent monochrome information
DC2And shinny, at this moment, liquid crystal display voltage V
LC2Meeting is the accurate position of data V therewith
DC2Unanimity, and storage capacitors C
ST-21Can be recharged.When the scan electrode of this scanner driver 402 entered nonselection mode, display unit 411 meetings that couple with it were by electrical isolation, and the liquid crystal display capacitor C
LC-21Then by the storage capacitors C of previous charging
ST-21Supply is with stabilizing liquid crystal display voltage V
LC2, and make display unit 411 maintain shinny state.
In general driving frequency following time, circuit controller 404 only makes display unit 411 activate, and electric capacity feedway 412b is activated, and not effect of the electric capacity feedway 412b of this moment can be represented shown in Fig. 7 a.
When display unit 411 during at nonselection mode, though liquid crystal display voltage V
LC2Can be by storage capacitors C
ST-21Stably keep, but still a little power loss can be arranged because of the cause of pixel itself or peripheral element, so before charging next time, liquid crystal display voltage V
LC2Current potential △ V can descend
2
Charge frequency under the general driving frequency is very fast, liquid crystal display voltage V
LC2Deduct decline current potential △ V from noble potential
2Get back to V
LC2The process of current potential be difficult for being found by the user; Yet under battery saving modes such as holding state, its driving frequency for example is the following low driving frequency of 40Hz, and the time of each charging room is extended, and makes electric weight continue to run off, and causes liquid crystal display voltage V
LC2Can suppression ratio decline current potential △ V before charging next time
2More current potential.Liquid crystal display voltage V
LC2Current potential descend manyly more, the voltage variety during charging is just big more, then easy more being discovered by the user and feel film flicker.
Situation for fear of film flicker takes place, under the low frequency driving frequency of standby or battery saving mode, when the one scan electrode of scanner driver 402 enters selected state, by control line CL
1The display unit that couples with it 411 can conductings, and can be applied in an accurate V of data that represent monochrome information
DC2And shinny, at this moment, liquid crystal display voltage V
LC2Meeting is the accurate position of data V therewith
DC2Unanimity, and storage capacitors C
ST-21Can be recharged; Simultaneously, circuit controller 404 also can be by control line CL
2Make transistor T
32Open, at this moment, electric capacity feedway 412b is activated and make storage capacitors C
ST-32Charging.Thus, the electric weight that stores during the charging of pixel 401a will increase to storage capacitors C
ST-21And storage capacitors C
ST-32Both sum totals.Because display unit 411 and electric capacity feedway 412b are activated simultaneously, therefore can represent shown in Fig. 7 b.
When the scan electrode of this scanner driver 402 entered nonselection mode, display unit 411 meetings that couple with it were by electrical isolation, and the liquid crystal display capacitor C
LC-21Then by the storage capacitors C of previous charging
ST-21And storage capacitors C
ST-32Both stably supply, with stabilizing liquid crystal display voltage V
LC2, and make display unit 411 maintain shinny state.
When display unit 411 during at nonselection mode, though liquid crystal display voltage V
LC2Can be by storage capacitors C
ST-21And storage capacitors C
ST-32Both stably keep, but still a little power loss can be arranged because of the cause of pixel itself or peripheral element, so before charging next time, liquid crystal display voltage V
LC2Can decline current potential Δ V
2', current potential Δ V
2' with the decline current potential Δ V of general frequency
2Difference is little.
Though under battery saving modes such as holding state, the time of each charging room can be extended and make electric weight continue to run off, because of pixel 401a has storage capacitors C simultaneously
ST-21And storage capacitors C
ST-32Cause, the total electric weight of storage is increased, make pixel 401a keep higher voltage before the charging in next time, the voltage variety when making charging reduces, thus, the user will be difficult for discovering the potential change of pixel and can not feel film flicker.
Claims (10)
1. pixel structure with multiple storage capacitors is characterized in that described pixel knot with multiple storage capacitors comprises:
One display unit has a transistor, and a main reservior capacitor couples this transistor;
One electric capacity feedway has a less important reservior capacitor and an on-off element, and this less important reservior capacitor and this on-off element couple, and sees through the conducting of this on-off element, should be connected in parallel to this main reservior capacitor by less important reservior capacitor.
2. the pixel structure with multiple storage capacitors according to claim 1, it is characterized in that: this electric capacity feedway is the driving frequency according to this display unit correspondence, optionally see through the conducting of this on-off element, should be connected in parallel to this main reservior capacitor by less important reservior capacitor.
3. the pixel structure with multiple storage capacitors according to claim 1 is characterized in that: this on-off element that this less important storage capacitors coupled is connected mutually.
4. the pixel structure with multiple storage capacitors according to claim 1 is characterized in that: this on-off element is a transistor.
5. display panel is characterized in that described display panel comprises:
The plural number sweep trace;
The complex data line; And
The plural number pixel structure is provided with corresponding to each staggered place of this sweep trace and this data line, and wherein, each pixel structure comprises:
One display unit has a transistor, and a main storage capacitors is coupled to this transistor; And
One electric capacity feedway has a less important reservior capacitor, and wherein this a less important reservior capacitor and an on-off element couple;
Wherein, the running of this display panel is in one first pattern following time, and via the conducting of this on-off element, selection should be connected in parallel to this main reservior capacitor by less important reservior capacitor.
6. display panel according to claim 5 is characterized in that: this less important reservior capacitor is connected mutually with this on-off element that is coupled.
7. display panel according to claim 6 is characterized in that: more comprise a control circuit, select under this first pattern and should less important storage capacitors be connected in parallel to this main reservior capacitor in order to order about this electric capacity feedway.
8. display panel according to claim 5 is characterized in that: this on-off element is a transistor.
9. display panel according to claim 5 is characterized in that: when the running of this display panel in one second pattern following time, this electric capacity feedway should less important reservior capacitor and this main reservior capacitor dialysis.
10. display panel according to claim 9 is characterized in that: the driving frequency of this first pattern is less than the driving frequency of this second pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100347117A CN100573281C (en) | 2004-04-26 | 2004-04-26 | Pixel structure and display panel with multiple storage capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100347117A CN100573281C (en) | 2004-04-26 | 2004-04-26 | Pixel structure and display panel with multiple storage capacitors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1690818A true CN1690818A (en) | 2005-11-02 |
| CN100573281C CN100573281C (en) | 2009-12-23 |
Family
ID=35346349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100347117A Expired - Lifetime CN100573281C (en) | 2004-04-26 | 2004-04-26 | Pixel structure and display panel with multiple storage capacitors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100573281C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964170A (en) * | 2010-09-02 | 2011-02-02 | 友达光电股份有限公司 | Storage circuit, pixel circuit and related data access method |
| CN101452168B (en) * | 2007-12-06 | 2013-09-11 | 群创光电股份有限公司 | LCD and liquid crystal display board thereof |
| CN106527003A (en) * | 2016-12-29 | 2017-03-22 | 厦门天马微电子有限公司 | Array substrate, liquid crystal display panel and display device |
| CN109410842A (en) * | 2018-12-29 | 2019-03-01 | 云谷（固安）科技有限公司 | A kind of pixel-driving circuit and display device |
| CN109830205A (en) * | 2019-04-17 | 2019-05-31 | 京东方科技集团股份有限公司 | A kind of array substrate, its driving method, display panel and display device |
| CN111458944A (en) * | 2020-04-23 | 2020-07-28 | Oppo广东移动通信有限公司 | Display device and electronic apparatus |
| WO2023138360A1 (en) * | 2022-01-19 | 2023-07-27 | 荣耀终端有限公司 | Electrowetting substrate, electrowetting display panel and electrowetting display apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110262147B (en) | 2018-08-10 | 2021-10-29 | 友达光电股份有限公司 | Semiconductor substrate and driving method |
-
2004
- 2004-04-26 CN CNB2004100347117A patent/CN100573281C/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101452168B (en) * | 2007-12-06 | 2013-09-11 | 群创光电股份有限公司 | LCD and liquid crystal display board thereof |
| CN101964170A (en) * | 2010-09-02 | 2011-02-02 | 友达光电股份有限公司 | Storage circuit, pixel circuit and related data access method |
| CN101964170B (en) * | 2010-09-02 | 2012-10-03 | 友达光电股份有限公司 | Storage circuit, pixel circuit and related data access method |
| CN106527003A (en) * | 2016-12-29 | 2017-03-22 | 厦门天马微电子有限公司 | Array substrate, liquid crystal display panel and display device |
| CN109410842A (en) * | 2018-12-29 | 2019-03-01 | 云谷（固安）科技有限公司 | A kind of pixel-driving circuit and display device |
| CN109410842B (en) * | 2018-12-29 | 2020-03-27 | 云谷（固安）科技有限公司 | Pixel driving circuit and display device |
| CN109830205A (en) * | 2019-04-17 | 2019-05-31 | 京东方科技集团股份有限公司 | A kind of array substrate, its driving method, display panel and display device |
| CN109830205B (en) * | 2019-04-17 | 2022-05-20 | 京东方科技集团股份有限公司 | Array substrate, driving method thereof, display panel and display device |
| CN111458944A (en) * | 2020-04-23 | 2020-07-28 | Oppo广东移动通信有限公司 | Display device and electronic apparatus |
| WO2023138360A1 (en) * | 2022-01-19 | 2023-07-27 | 荣耀终端有限公司 | Electrowetting substrate, electrowetting display panel and electrowetting display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100573281C (en) | 2009-12-23 |
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Granted publication date: 20091223 |
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