CN102592560B - Common voltage generation circuit - Google Patents
Common voltage generation circuit Download PDFInfo
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- CN102592560B CN102592560B CN 201210066857 CN201210066857A CN102592560B CN 102592560 B CN102592560 B CN 102592560B CN 201210066857 CN201210066857 CN 201210066857 CN 201210066857 A CN201210066857 A CN 201210066857A CN 102592560 B CN102592560 B CN 102592560B
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- common electric
- partial pressure
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Abstract
The invention provides a common voltage generation circuit which comprises a time schedule controller, an internal memory and a voltage conversion unit; the time schedule controller is provided with a data controller and a voltage dividing unit after integration, and the signal output terminal of the data controller is electrically coupled with the voltage dividing unit; the internal memory is electrically coupled with the data controller; and the input terminal of the voltage conversion unit is electrically coupled with the voltage dividing unit, and the voltage conversion unit is used for converting the output voltage signal of the voltage dividing unit into a common voltage signal. By adopting the common voltage generation circuit, most of the units or components are integrated into the time schedule controller, or the integration of most of the units or components is realized through the original related circuit inside the time schedule controller or the power integrated circuit (Power IC), so that the configuration of a single common voltage integrated circuit can be saved, the required digital common voltage signal can still be generated through the original circuit or merely adding parts of the circuits, and the cost is further saved greatly.
Description
Technical field
The present invention relates to a kind of voltage generation circuit, relate in particular to the common electric voltage generating circuit in a kind of display device.
Background technology
In recent years, because LCD has the characteristic of high-quality image display capabilities and low power consumption, so it generally is used as display device.
With LCD, dispose in its display panel and comprise the array of pixel electrodes substrate, comprise the filter sheet base plate of common electrode and place between the two liquid crystal molecule.In operation, pixel electrode and common electrode are imposed pixel voltage and common electric voltage (VCOM) respectively, make liquid crystal molecule rotate accordingly because of the potential difference (PD) between pixel voltage and common electric voltage by this or change direction, influence the penetration of light by the angle of liquid crystal molecule is different to present display frame.
Generally speaking, be provided with special-purpose integrated circuit (IC) to produce aforementioned common electric voltage in the display panel usually.Yet this integrated circuit is set in display panel not only can increase cost significantly, does not meet economic benefit, and this adhesive integrated circuit generally all is set with the restriction that data are write indegree, inconvenient and do not have elasticity in the use.
Summary of the invention
One of purpose of the present invention is to be, a kind of common electric voltage generating circuit is provided, and uses to solve the special-purpose problem that causes cost to increase with the integrated circuit that produces common electric voltage is set in the display panel.
According to one embodiment of the present invention, a kind of common electric voltage generating circuit is provided, it comprises time schedule controller, recording controller, internal memory, partial pressure unit and voltage conversion unit.Time schedule controller is in order to transmit at least one signal.Recording controller receives this signal in order to see through the internal integrated circuit interface.Internal memory is in order to store corresponding to the voltage of signals data, and wherein, recording controller produces a control signal according to internal memory stored voltage data and this signal.Partial pressure unit is in order to produce an analog voltage signal according to this control signal.Voltage conversion unit is in order to be converted to the common electric voltage signal with this analog voltage signal.Wherein, recording controller and partial pressure unit are integrated in the time schedule controller jointly.
According to another embodiment of the present invention, a kind of common electric voltage generating circuit is provided, it comprises time schedule controller, internal memory and voltage conversion unit.Time schedule controller has recording controller and partial pressure unit through integration, the signal output part electric property coupling partial pressure unit of recording controller.This recording controller of internal memory electric property coupling.This partial pressure unit of input end electric property coupling of voltage conversion unit, voltage conversion unit is converted to the common electric voltage signal in order to the output with this partial pressure unit.
According to technology contents of the present invention, the application of aforementioned common electric voltage generating circuit, not only most unit or assembly can be integrated in the time schedule controller, perhaps realize most unit or assembly by time schedule controller or the inner original interlock circuit of power integrated circuit (Power IC), therefore the configuration that can save single common electric voltage integrated circuit, and still can see through original circuit or only need increase partial circuit newly, produce required digital common electric voltage signal, and then save cost significantly.In addition, adopt the described common electric voltage generating circuit of the embodiment of the invention, the internal memory that just can select to be fit to comes storage data, makes that data can make things convenient for and tool flexibly repeatedly writes, and need not be subject to single common electric voltage integrated circuit and be set with the restriction of writing indegree.
Content of the present invention aims to provide the simplification summary of this disclosure, so that the reader possesses basic understanding to this disclosure.This summary of the invention is not the complete overview of this disclosure, and its purpose is not at important (or crucial) assembly of pointing out the embodiment of the invention or defines scope of the present invention.
Description of drawings
The reader will become apparent various aspects of the present invention after the reference accompanying drawing has been read the specific embodiment of the present invention.Wherein,
Fig. 1 illustrates the synoptic diagram according to the common electric voltage generating circuit of first embodiment of the invention.
Fig. 2 A is the circuit diagram of the common electric voltage generating circuit as shown in Figure 1 that illustrates according to the embodiment of the invention.
Fig. 2 B is the circuit diagram of the digital analog converter that illustrates according to the embodiment of the invention.
Fig. 3 illustrates the synoptic diagram according to the common electric voltage generating circuit of second embodiment of the invention.
Fig. 4 illustrates the synoptic diagram according to the common electric voltage generating circuit of third embodiment of the invention.
Fig. 5 illustrates the synoptic diagram according to the common electric voltage generating circuit of fourth embodiment of the invention.
[primary clustering symbol description]
100,200,300,400,500: common electric voltage generating circuit
110,210,310,410,520: time schedule controller
120,220,320,420,520: recording controller
130,230,330,430,530: internal memory
140,240,340,440,540: partial pressure unit
150,250,350,450,550: voltage conversion unit
262: buffer
264: code translator
266: bleeder circuit
Embodiment
For technology contents that the application is disclosed is more detailed and complete, can be with reference to accompanying drawing and following various specific embodiments of the present invention, identical mark represents same or analogous assembly in the accompanying drawing.Yet those of ordinary skill in the art should be appreciated that the embodiment that hereinafter provides limits the scope that the present invention is contained.In addition, accompanying drawing only is used for schematically being illustrated, and does not draw according to its life size.
Generally being often referred to error in value or scope in 20 percent about it " pact " used herein, " approximately " or " roughly ", is preferably in 10, more preferably then is in 5 percent.Wen Zhongruo does not have and offers some clarification on, and its mentioned numerical value is all regarded as approximate value, namely as " pact ", " approximately " or " roughly " represented error or scope.
In addition, " couple " or " connection " about used herein it, can refer to that all two or more assemblies directly do entity or electrically contact mutually, or put into effect body or electrically contact mutually indirectly, and " coupling " also can refer to two or more assembly mutual operation or action.
Fig. 1 illustrates the synoptic diagram according to the common electric voltage generating circuit of first embodiment of the invention.As shown in Figure 1, common electric voltage (Common Voltage, Vcom) produce circuit 100 and comprise time schedule controller 110, recording controller 120, internal memory 130, partial pressure unit 140 and voltage conversion unit 150, wherein recording controller 120 is integrated in the time schedule controller 110 jointly with partial pressure unit 140, makes time schedule controller 110 have recording controller 120 and partial pressure unit 140 through integration in wherein.
The signal output part electric property coupling partial pressure unit 140 of recording controller 120, and partial pressure unit 140 is in order to receiving the control signal CTR that recording controller 120 is exported, and produce an analog voltage signal AVS according to control signal CTR.
The input end electric property coupling partial pressure unit 140 of voltage conversion unit 150, and be converted to energising altogether in order to the analog voltage signal AVS that partial pressure unit 140 is produced and press signal VCOM.
Fig. 2 A is the circuit diagram of the common electric voltage generating circuit as shown in Figure 1 that illustrates according to the embodiment of the invention.Shown in Fig. 2 A, in common electric voltage generating circuit 200, time schedule controller 210 has recording controller 220 (comprising the internal integrated circuit interface) and partial pressure unit 240 through integration, the signal output part electric property coupling partial pressure unit 240 of recording controller 220, internal memory 230 is disposed at the outside of time schedule controller 210 and electric property coupling recording controller 220, and voltage conversion unit 250 is disposed at the outside of time schedule controller 210 and electric property coupling partial pressure unit 240.
In one embodiment, partial pressure unit 240 can or be disposed in the digital analog converter (DAC) for digital analog converter (DAC), and this digital analog converter is converted to corresponding analog voltage signal in order to the signal that recording controller 220 is exported, Fig. 2 B is the circuit diagram of the aforementioned digital analog converter that illustrates according to the embodiment of the invention, shown in Fig. 2 B, digital analog converter comprises buffer (Register) 262, code translator (Decoder) 264 and bleeder circuit (R2) 266.
Simultaneously with reference to Fig. 2 A and Fig. 2 B, in operation, recording controller 220 can read relevant information or data from internal memory 230, again information or the data that read are write in the buffer 262, and when needs output or adjustment common electric voltage signal VCOM, relevant information or data can see through data-signal SDA and clock signal SCL again by in recording controller 220 write memories 230 or the buffer 262, code translator 264 is converted to corresponding signal with relevant information or data then, each switch (S) in the bleeder circuit 266 is according to corresponding unblanking or close, make the corresponding simulating voltage signal produce according to the dividing potential drop situation of correspondence, and and then be sent to voltage conversion unit 250.In one embodiment, aforementioned line related about internal integrated circuit interface, recording controller 220 and partial pressure unit 240 all can be realized by original circuit of identical (or similar) function of time schedule controller 210 inner tools or configuration.In another embodiment, the line related that time schedule controller 210 did not originally have partial pressure unit 240, and the line related of partial pressure unit 240 is newly-increased and is integrated in the time schedule controller 210.
In one embodiment, when voltage conversion unit 250 is disposed at time schedule controller 210 outside, voltage conversion unit 250 also can be integrated in the power integrated circuit (PowerIC), or realizes by original circuit of identical (or similar) function of power integrated circuit inside tool or identical configuration.
From the above, because the unit in the common electric voltage generating circuit or assembly can partly be integrated in the time schedule controller, perhaps realize by time schedule controller and the inner original interlock circuit of power integrated circuit, therefore under the situation of not using single common electric voltage integrated circuit, still can see through original circuit or only need increase partial circuit newly, can produce required digital common electric voltage signal according to this, and then save cost significantly.
In addition, adopt the described common electric voltage generating circuit of the embodiment of the invention, the internal memory that just can select to be fit to comes storage data, makes that data can make things convenient for and tool flexibly repeatedly writes, and need not be subject to single common electric voltage integrated circuit and be set with the restriction of writing indegree.
Fig. 3 illustrates the synoptic diagram according to the common electric voltage generating circuit of second embodiment of the invention.As shown in Figure 3, in common electric voltage generating circuit 300, voltage conversion unit 350 is integrated in the time schedule controller 310 jointly with recording controller 320 (comprising the internal integrated circuit interface) and partial pressure unit 340, the signal output part electric property coupling partial pressure unit 340 of recording controller 320, internal memory 330 is disposed at the outside of time schedule controller 310 and electric property coupling recording controller 320, voltage conversion unit 350 electric property coupling partial pressure unit 340.
Similarly, aforementioned line related about internal integrated circuit interface, recording controller 320, partial pressure unit 340 and voltage conversion unit 350 all can be realized by original circuit of identical (or similar) function of time schedule controller 310 inner tools or configuration, and in another embodiment, time schedule controller 310 did not originally have the line related of partial pressure unit 340 and voltage conversion unit 350, and the line related of partial pressure unit 340 and voltage conversion unit 350 is newly-increased and is integrated in the time schedule controller 310.
From the above, because the unit in the common electric voltage generating circuit or assembly major part all can be integrated in time schedule controller, perhaps realize by the original interlock circuit in time schedule controller inside, therefore under the situation of not using single common electric voltage integrated circuit, still can see through original circuit or only need increase partial circuit newly, can produce required digital common electric voltage signal according to this, and then save cost significantly.In addition, data also can make things convenient for and tool flexibly repeatedly writes in the selected suitable internal memory, need not be subject to single common electric voltage integrated circuit and be set with the restriction of writing indegree.
Fig. 4 illustrates the synoptic diagram according to the common electric voltage generating circuit of third embodiment of the invention.As shown in Figure 4, in common electric voltage generating circuit 400, internal memory 430 is integrated in the time schedule controller 410 jointly with recording controller 420 (comprising the internal integrated circuit interface) and partial pressure unit 440, the signal output part electric property coupling partial pressure unit 440 of recording controller 420, internal memory 430 electric property coupling recording controllers 420, voltage conversion unit 450 are disposed at the outside of time schedule controller 410 and electric property coupling partial pressure unit 440.
Similarly, aforementioned line related about internal integrated circuit interface, recording controller 420, partial pressure unit 440 and internal memory 430 all can be realized by original circuit of identical (or similar) function of time schedule controller 410 inner tools or configuration, and in another embodiment, time schedule controller 410 did not originally have the line related of partial pressure unit 440 and internal memory 430, and the line related of partial pressure unit 440 and internal memory 430 is newly-increased and is integrated in the time schedule controller 410.
Fig. 5 illustrates the synoptic diagram according to the common electric voltage generating circuit of fourth embodiment of the invention.As shown in Figure 5, in common electric voltage generating circuit 500, recording controller 520 (comprising the internal integrated circuit interface), internal memory 530, partial pressure unit 540 are integrated in the time schedule controller 510 jointly with voltage conversion unit 550, the signal output part electric property coupling partial pressure unit 540 of recording controller 520, internal memory 530 electric property coupling recording controllers 520, voltage conversion unit 550 electric property coupling partial pressure unit 540.
Similarly, aforementioned line related about internal integrated circuit interface, recording controller 520, partial pressure unit 540, internal memory 530 and voltage conversion unit 550 all can be realized by original circuit of identical (or similar) function of time schedule controller 510 inner tools or configuration.In another embodiment, time schedule controller 510 did not originally have the line related of partial pressure unit 540, internal memory 530 and voltage conversion unit 550, and the line related of partial pressure unit 540, internal memory 530 and voltage conversion unit 550 is newly-increased and is integrated in the time schedule controller 510.
On real the work, aforementioned internal memory can be (programmable) able to programme internal memory, for example, and EEPROM (Electrically Erasable Programmable Read Only Memo) (Electrically Erasable Programmable ReadOnly Memory, EEPROM) or the internal memory of other types, the present invention is not limited with above-mentioned.Secondly, aforementioned data controller (comprising the internal integrated circuit interface), internal memory, partial pressure unit and voltage conversion unit all optionally are integrated in the time schedule controller according to actual demand jointly or individually, and the present invention also is not limited with above-mentioned.
By the embodiment of the invention described above as can be known, because most unit or assembly all can be integrated in the time schedule controller in the circuit that produces common electric voltage, perhaps realize most unit or assembly by time schedule controller and the inner original interlock circuit of power integrated circuit (Power IC), therefore the configuration that can save single common electric voltage integrated circuit, and still can see through original circuit or only need increase partial circuit newly, produce required common electric voltage signal, and then save cost significantly.In addition, adopt the described common electric voltage generating circuit of the embodiment of the invention, the internal memory that just can select to be fit to comes storage data, makes that data can make things convenient for and tool flexibly repeatedly writes, and need not be subject to single common electric voltage integrated circuit and be set with the restriction of writing indegree.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replace all drop in claims of the present invention institute restricted portion.
Claims (10)
1. a common electric voltage generating circuit is characterized in that, described common electric voltage generating circuit comprises:
Time schedule controller is in order to transmit at least one signal;
One recording controller receives this signal in order to see through an internal integrated circuit interface;
One internal memory, in order to store corresponding to these voltage of signals data, wherein, this recording controller produces a control signal according to this internal memory stored voltage data and this signal;
One partial pressure unit is in order to produce an analog voltage signal according to this control signal; And
One voltage conversion unit is pressed signal in order to this analog voltage signal is converted to energising altogether,
Wherein this recording controller and this partial pressure unit are integrated in this time schedule controller jointly.
2. common electric voltage generating circuit as claimed in claim 1 is characterized in that, this memory configurations is in this time schedule controller outside, or is integrated in jointly in this time schedule controller with this recording controller and this partial pressure unit.
3. common electric voltage generating circuit as claimed in claim 1 or 2 is characterized in that, this voltage conversion unit and this recording controller and this partial pressure unit are integrated in this time schedule controller jointly.
4. common electric voltage generating circuit as claimed in claim 1 or 2 is characterized in that, this voltage conversion unit is disposed at this time schedule controller outside.
5. common electric voltage generating circuit as claimed in claim 4 is characterized in that, this voltage conversion unit is integrated in the power integrated circuit.
6. a common electric voltage generating circuit is characterized in that, described common electric voltage generating circuit comprises:
Time schedule controller, this time schedule controller has a recording controller and a partial pressure unit through integration, this partial pressure unit of signal output part electric property coupling of this recording controller;
One internal memory, this this recording controller of internal memory electric property coupling; And
One voltage conversion unit, this partial pressure unit of input end electric property coupling of this voltage conversion unit, this voltage conversion unit is converted to energising altogether in order to the output with this partial pressure unit and presses signal.
7. common electric voltage generating circuit as claimed in claim 6 is characterized in that, this memory configurations is in this time schedule controller outside, or is integrated in jointly in this time schedule controller with this recording controller and this partial pressure unit.
8. as claim 6 or 7 described common electric voltage generating circuits, it is characterized in that this voltage conversion unit and this recording controller and this partial pressure unit are integrated in this time schedule controller jointly.
9. as claim 6 or 7 described common electric voltage generating circuits, it is characterized in that this voltage conversion unit is disposed at this time schedule controller outside.
10. common electric voltage generating circuit as claimed in claim 9 is characterized in that, this voltage conversion unit is integrated in the power integrated circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210066857 CN102592560B (en) | 2012-03-12 | 2012-03-12 | Common voltage generation circuit |
| TW101114949A TWI444986B (en) | 2012-03-12 | 2012-04-26 | Common voltage generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210066857 CN102592560B (en) | 2012-03-12 | 2012-03-12 | Common voltage generation circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102592560A CN102592560A (en) | 2012-07-18 |
| CN102592560B true CN102592560B (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210066857 Active CN102592560B (en) | 2012-03-12 | 2012-03-12 | Common voltage generation circuit |
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| Country | Link |
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| CN (1) | CN102592560B (en) |
| TW (1) | TWI444986B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103869859A (en) * | 2012-12-12 | 2014-06-18 | 硕颉科技股份有限公司 | Shared voltage generating circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI235988B (en) * | 2004-03-29 | 2005-07-11 | Novatek Microelectronics Corp | Driving circuit of liquid crystal display |
| CN101303491B (en) * | 2007-05-11 | 2010-04-07 | 群康科技(深圳)有限公司 | Liquid crystal display apparatus and drive method thereof |
| CN101311781B (en) * | 2007-05-25 | 2012-02-08 | 群康科技(深圳)有限公司 | LCD device and its public voltage drive method |
| TW200923892A (en) * | 2007-11-23 | 2009-06-01 | Novatek Microelectronics Corp | Voltage generating system |
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2012
- 2012-03-12 CN CN 201210066857 patent/CN102592560B/en active Active
- 2012-04-26 TW TW101114949A patent/TWI444986B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TWI444986B (en) | 2014-07-11 |
| CN102592560A (en) | 2012-07-18 |
| TW201337890A (en) | 2013-09-16 |
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