CN100468514C - Voltage level regulation circuit, method and display device - Google Patents
Voltage level regulation circuit, method and display device Download PDFInfo
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- CN100468514C CN100468514C CNB2007101397189A CN200710139718A CN100468514C CN 100468514 C CN100468514 C CN 100468514C CN B2007101397189 A CNB2007101397189 A CN B2007101397189A CN 200710139718 A CN200710139718 A CN 200710139718A CN 100468514 C CN100468514 C CN 100468514C
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- 230000002093 peripheral effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention is a voltage level adjustment circuit, a method, and a display device. The display device at least includes a data line and a voltage level adjustment circuit. The voltage level adjustment circuit includes a capacitance and a switch. The capacitance receives a reference voltage for charging the capacitance to a voltage level. A switch is connected with the data line and capacitance electrically. A voltage of the data line is adjusted through the turn-on of the switch and the voltage level adjustment of the capacitance.
Description
Technical field
The present invention is about a kind of display device and in order to the voltage level regulation circuit and the method for the voltage level of adjusting this display device.
Background technology
In recent years, the development of flat-panel screens is more and more rapider, has replaced traditional cathode-ray tube display gradually.Flat-panel screens now mainly contains following several: organic light emitting diode display (Organic Light-Emitting Diodes Display; OLED), plasma display panel (Plasma DisplayPanel; PDP), LCD (Liquid Crystal Display; LCD) and Field Emission Display (Field Emission Display; FED) etc.Wherein LCD is more because advantages such as its low power consumption, frivolous and high resolving power become the main flow of consumer display now already.
General LCD mainly is made up of a pel array and one drive circuit, each pixel in the pel array mainly is made of a pixel switch and a liquid crystal capacitance, driving circuit then is the Push And Release that is used for controlling each pixel in the pel array, so that pel array is finished the demonstration of picture.
And for the operating voltage that reduces driving circuit reaches the characteristic of low-power consume, the required common-battery of general LCD press (common voltage; Vcom) adopt the AC driving mode to produce.And owing to the characteristic of AC driving mode influences, the common-battery that adopts the AC driving mode to be provided is pressed the skew of the voltage that will cause pixel capacitance, and cause the voltage level drift of other suspension joint (floating) circuit, wherein the most significantly no more than the voltage level drift of the data line of pixel.Because the electric capacity of data line is much larger than pixel capacitance, and the electric capacity of data line is a suspension joint circuit in pixel driven moment.So when driving pixel, the voltage level of data line meeting drift, and then cause driving the required voltage increase of pixel.And the required big voltage of the driving pixel that is produced for the voltage level drift that remedies data line, driving circuit need have the ability that bigger voltage is provided, and this promptly not only consumes bigger power, also can influence the required time of pixel that drives simultaneously.
For addressing the above problem, usually when making LCD, the chamber of commerce of manufacturing plant is connected to data line on one fixed voltage source, utilize of the electric capacity pre-charge of the time of this fixed voltage source unlatching of control with data line, with the voltage level of control data line and the scope of dwindling the voltage that driving circuit need provide, and then shorten the time that drives pixel.Though data line is connected on the fixed voltage source can improves the ability that driving circuit provides voltage.But use the method will significantly increase the power consumption that common-battery is pressed conversely speaking,, and cause the drift of the voltage level of common-battery pressure easily.
Therefore will be how the voltage level of data line be controlled within the suitable scope, and improves the ability that driving circuit provides voltage, required time when driving pixel to shorten is the target of the required effort of flat-panel screens manufacturer.
Summary of the invention
In view of this, the method that the present invention proposes a kind of voltage level regulation circuit and adjusts voltage level by the conducting of an electric capacity and a switch, is adjusted the voltage of the data line of pixel.
A purpose of the present invention is to provide a kind of voltage level regulation circuit that is applied to a display device.This display device comprises at least one data line.This voltage level regulation circuit comprises an electric capacity and at least one switch.This electric capacity receives a reference voltage, and this reference voltage is in order to charge to a voltage level to this electric capacity.This switch electrically connects this data line and this electric capacity.And a voltage of this data line is by the conducting of this switch and the voltage level adjustment of this electric capacity.
Another object of the present invention is to provide a kind of display device, it comprises at least one data line and the described voltage level regulation circuit of leading portion.This display device is adjusted a voltage of this data line by this voltage level regulation circuit.
A further object of the present invention is to provide a kind of method of adjusting voltage level, and this method is applied to a display device.This display device comprises at least one data line.This method comprises the following step: an electric capacity is provided; According to a reference voltage this electric capacity is charged to a voltage level; At least one switch is provided; And when this switch conduction, adjust a voltage of this data line by the voltage level of this electric capacity.
The present invention uses an electric capacity and a switch to control the voltage of the data line of display device, with with the Control of Voltage of data line within suitable scope, and then the driving circuit that improves display device provides the ability of voltage, and the driving circuit that shortens display device required time when driving pixel.
After consulting embodiment graphic and that describe subsequently, this technical field has knows that usually the knowledgeable just can understand other purpose of the present invention, and technological means of the present invention and enforcement aspect.
Description of drawings
Fig. 1 is the synoptic diagram of the first embodiment of the present invention;
Fig. 2 is the synoptic diagram of the second embodiment of the present invention; And
Fig. 3 is the process flow diagram of the third embodiment of the present invention.
Drawing reference numeral:
1: display device 11: pel array
13: voltage level regulation circuit 15,17: peripheral circuit
111,112,113: sweep trace 114,115,116: data line
130: reference voltage 131: reference voltage circuit
133: the first switches of 132: the first signals
133a: the first contact 133b: second contact
134: secondary signal 135: electric capacity
135a: first utmost point 135b: second utmost point
1311: division module 1313: second source
Power supply 2 in 1315: the three: display device
R: resistance
Embodiment
The first embodiment of the present invention is a kind of display device 1 as shown in Figure 1, and it comprises a pel array 11, a voltage level regulation circuit 13 and peripheral circuit 15,17.Pel array 11 has comprised a plurality of sweep traces (for convenience of explanation, herein only with 111,112,113 expressions) and a plurality of data lines (only representing with 114,115,116 among the figure for convenience of explanation).Voltage level regulation circuit 13 comprises a reference voltage circuit 131, a plurality of first switch 133 and an electric capacity 135.Reference voltage circuit 131 is in order to produce a reference voltage 130.133 on those first switches electrically connect data line 114,115,116 and electric capacity 135 respectively.Peripheral circuit 15 provides sweep trace 111,112,113 driving voltages.17 of peripheral circuits provide data line 114,115,116 driving voltages, and voltage level regulation circuit 13 is disposed between peripheral circuit 17 and the data line 114,115,116, in order to adjust the voltage of data line 114,115,116.
133 on those first switches have one first contact 133a and one second contact 133b respectively.The first contact 133a of those first switches 133 all is electrically connected to first utmost point 135a of electric capacity 135.The second contact 133b of those first switches 133 then electrically connects data line 114,115,116 respectively.
131 of reference voltage circuits comprise a division module 1311, and 1311 of division module electrically connect a second source 1313 and one the 3rd power supply 1315.Division module 1311 comprises a plurality of resistance R, carries out dividing potential drop and produces reference voltage 130 in order to the pressure reduction at second source 1313 and the 3rd power supply 1315.
When first switch 133 by the control of one first signal 132 during conducting (turnon), this moment, data line 114,115,116 can electrically connect by first switch 133 and electric capacity 135, electric capacity 135 can use the voltage level that has before reached to adjust at data line 114,115,116, in the hope of the purpose of the voltage that reaches the control data line.And aforesaid first signal 132 can be provided by peripheral circuit 15,17, or is provided by the control circuit in other display device 1.Be familiar with this operator and can use the purpose that various circuit reach provides first signal 132, so do not repeat them here.
In the present embodiment, first power supply 137 and second source 1313 can be a ground signalling, that is 0 volt of voltage.Division module 1311 is the number of limiting resistance R not then, further say, it is the mode that division module 1311 does not limit second source 1313 and the 3rd power supply 1315 dividing potential drops, except carrying out the dividing potential drop with a plurality of resistance R, being familiar with this operator also can use the method for other dividing potential drop to reach purpose of the present invention, so do not repeat them here.
The second embodiment of the present invention is another kind of display device 2 then as shown in Figure 2, and its structure is most of identical with display device 1.Its difference is in voltage level regulation circuit 13 and more comprises a second switch 139.Second switch 139 is electrically connected between first utmost point 135a of reference voltage circuit 131 and electric capacity 135, and control its conducting by a secondary signal 134, in order to avoiding when 133 conductings of first switch, reference voltage 130 can be subjected to data line 114,115,116 voltage influence and produce skew.The detailed action of first switch 133 and second switch 139 is then as described in the hypomere.And aforesaid secondary signal 134 also can be provided by peripheral circuit 15,17, or is provided by the control circuit in other display device 1.Be familiar with this operator and can use the purpose that various circuit reach provides secondary signal 134, so do not repeat them here.
When second switch 139 conductings, reference voltage 130 can electrically connect by second switch 139 and electric capacity 135, and electric capacity 135 also is promoted to a voltage level by reference voltage 130.And for the voltage of isolated reference voltage 130 with data line 114,115,116, during first switch, 133 conductings of present embodiment, then second switch 139 not conductings.Anti-speech, during as if second switch 139 conductings, then first switch, 133 not conductings.Making first signal 132 and secondary signal 134 is that an inversion signal then is a kind of enforcement aspect wherein.Right the present invention does not limit the relation of first signal 132 and secondary signal 134, when first switch 133 is the transistor of different kenels with second switch 139, when for example first switch 133 was respectively the transistor of P type MOS (metal-oxide-semiconductor) transistor (P_MOS) and N type MOS (metal-oxide-semiconductor) transistor (N_MOS) with second switch 139, first signal 132 can be an in-phase signal with 134 of secondary signals.Be familiar with this operator and can understand that first switch 133 and the conducting of second switch 139 concern, so do not repeat them here by aforesaid explanation.
The third embodiment of the present invention is a kind of method of adjusting voltage level in display device as shown in Figure 3, and this display device can be the display device 2 described in second embodiment.This method is described as follows.
During execution in step S01, provide an electric capacity, for example the electric capacity 135 of second embodiment.Then execution in step S02 provides one first switch, electrically connects the data line of this electric capacity and display device, for example first switch 133 of second embodiment.Execution in step S03 provides a second switch again, electrically connects this electric capacity, for example the second switch 139 of second embodiment.Execution in step S04 when the second switch conducting, transmit a reference voltage to this electric capacity, and reference voltage can be the reference voltage 130 of second embodiment.Execution in step S05 charges to a voltage level according to this reference voltage with this electric capacity again.Last execution in step S06 when first switch conduction, adjusts a voltage of a data line, for example voltage of the data line 114,115,116 of second embodiment by this voltage level.
The present invention uses an electric capacity and a switch to control the voltage of the data line of display device, with with the Control of Voltage of data line within suitable scope, and then the driving circuit that improves display device provides the ability of voltage, and the driving circuit that shortens display device required time when driving pixel, with the oversize shortcoming that is caused of time of avoiding prior art when driving pixel, to be spent.
The above embodiments only are used for exemplifying enforcement aspect of the present invention, and explain technical characterictic of the present invention, are not to be used for limiting category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, interest field of the present invention should be as the criterion with the claim scope.
Claims (16)
1. a voltage level regulation circuit is used for a display device, and described display device comprises at least one data line, and described voltage level regulation circuit comprises:
One electric capacity, in order to receive a reference voltage, described reference voltage is in order to charge to a voltage level to described electric capacity; And
At least one first switch electrically connects described data line and described electric capacity;
Wherein, the described voltage level of described electric capacity is used to adjust a voltage of described data line by the conducting of described first switch.
2. voltage level regulation circuit as claimed in claim 1 is characterized in that:
Described electric capacity has one first utmost point and one second utmost point, and described first utmost point is in order to receive described reference voltage, and described second utmost point is electrically connected to one first power supply; And
Described first switch has one first contact and one second contact, and described first contact is electrically connected to first utmost point of described electric capacity, and described second contact is electrically connected to described data line.
3. voltage level regulation circuit as claimed in claim 1 also comprises a reference voltage circuit, in order to produce described reference voltage.
4. voltage level regulation circuit as claimed in claim 3, it is characterized in that, described reference voltage circuit has a division module, described division module electrically connects a second source and one the 3rd power supply, and produces described reference voltage according to described second source and described the 3rd power supply.
5. voltage level regulation circuit as claimed in claim 4 is characterized in that the division module of described reference voltage circuit comprises a plurality of resistance.
6. voltage level regulation circuit as claimed in claim 3 also comprises a second switch, electrically connects described reference voltage circuit and described electric capacity, and described reference voltage transfers to described electric capacity by the conducting of described second switch.
7. voltage level regulation circuit as claimed in claim 6, described display device also comprises at least one driving circuit, described voltage level regulation circuit is in order to be received one first signal and a secondary signal by described driving circuit, described first signal is in order to control the conducting of described first switch, and described secondary signal is in order to control the conducting of described second switch.
8. display device comprises:
At least one data line; And
One voltage level regulation circuit comprises:
One electric capacity, in order to receive a reference voltage, described reference voltage is in order to charge to a voltage level to described electric capacity; And
At least one first switch electrically connects described data line and described electric capacity;
Wherein, the described voltage level of described electric capacity by the conducting of described first switch in order to adjust a voltage of described data line.
9. display device as claimed in claim 8 is characterized in that:
Described electric capacity has one first utmost point and one second utmost point, and described first utmost point is in order to receive described reference voltage, and described second utmost point is electrically connected to one first power supply; And
Described first switch has one first contact and one second contact, and described first contact is electrically connected to first utmost point of described electric capacity, and described second contact is electrically connected to described data line.
10. display device as claimed in claim 8 is characterized in that described voltage level regulation circuit also comprises a reference voltage circuit, in order to produce described reference voltage.
11. display device as claimed in claim 10, it is characterized in that, described reference voltage circuit has a division module, and described division module electrically connects a second source and one the 3rd power supply, and produces described reference voltage according to described second source and described the 3rd power supply.
12. display device as claimed in claim 11 is characterized in that, the division module of described reference voltage circuit is made up of a plurality of resistance.
13. display device as claimed in claim 10, it is characterized in that, described voltage level regulation circuit also comprises a second switch, is electrically connected to described reference voltage circuit and described electric capacity, and described reference voltage transfers to described electric capacity by the conducting of described second switch.
14. display device as claimed in claim 13 also comprises:
At least one driving circuit;
Described voltage level regulation circuit is in order to be received one first signal and a secondary signal by described driving circuit, described first signal is in order to control the conducting of described first switch, and described secondary signal is in order to control the conducting of described second switch.
15. a method of adjusting voltage level, described method is applied to a display device, and described display device comprises at least one data line, and described method comprises the following step:
One electric capacity is provided;
According to a reference voltage described electric capacity is charged to a voltage level;
At least one first switch is provided, electrically connects described electric capacity and described data line; And
When described first switch conduction, adjust a voltage of described data line by the voltage level of described electric capacity.
16. method as claimed in claim 15 also comprises the following step:
One second switch is provided; And
When described second switch conducting, transmit described reference voltage to described electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101397189A CN100468514C (en) | 2007-07-27 | 2007-07-27 | Voltage level regulation circuit, method and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101397189A CN100468514C (en) | 2007-07-27 | 2007-07-27 | Voltage level regulation circuit, method and display device |
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| Publication Number | Publication Date |
|---|---|
| CN101105926A CN101105926A (en) | 2008-01-16 |
| CN100468514C true CN100468514C (en) | 2009-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101397189A Active CN100468514C (en) | 2007-07-27 | 2007-07-27 | Voltage level regulation circuit, method and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI765967B (en) * | 2018-02-14 | 2022-06-01 | 李尚禮 | Capacitive sensor device and method for obtaining a reference level thereof |
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Effective date of registration: 20180426 Address after: Hongkong Chinese Tsuen Tai Chung Road No. 8 TCL industrial center 13 floor Patentee after: Huaxing Optoelectronic International (Hong Kong) Co.,Ltd. Address before: Hsinchu City, Taiwan, China Patentee before: AU OPTRONICS Corp. |
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Effective date of registration: 20231218 Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: Hongkong Chinese Tsuen Tai Chung Road No. 8 TCL industrial center 13 floor Patentee before: Huaxing Optoelectronic International (Hong Kong) Co.,Ltd. |