CN101783126B - Display panel driving circuit with capacitance drive - Google Patents
Display panel driving circuit with capacitance drive Download PDFInfo
- Publication number
- CN101783126B CN101783126B CN201010133874.6A CN201010133874A CN101783126B CN 101783126 B CN101783126 B CN 101783126B CN 201010133874 A CN201010133874 A CN 201010133874A CN 101783126 B CN101783126 B CN 101783126B
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- display panel
- electric capacity
- driving
- signal
- circuit
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- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to a display panel driving circuit with capacitance drive. An analog-to-digital converting circuit is used for converting an input signal to generate a digital signal; a capacitor receives the digital signal to generate a driving signal so as to drive a display panel; and a switching circuit controls the analog-to-digital converting circuit to transmit the digital signal to the capacitor according to a switching signal, or the capacitor transmits the driving signal to the display panel. In this way, the display panel is driven by a capacitance driving method to effectively reduce the area of the data driving circuit according to requirements on images of high digits so as to save cost. Moreover, a power supply system of a display device is simplified in application of a relatively larger voltage range.
Description
Technical field
The invention relates to a kind of driving circuit, it is espespecially a kind of driving circuit with the display panel that electric capacity drives.
Background technology
Scientific and technological flourish now, information product kind is weeded out the old and bring forth the new, and meets popular different demands.Early stage display is cathode-ray tube (CRT) (Cathode Ray Tube mostly, CRT) display, because it is bulky large with power consumption, and the radiant rays produced is for the long-time user using display, there is the doubt of harm health, therefore, display on the market will replace old CRT monitor by liquid crystal display (Liquid Crystal Display, LCD) gradually now.Liquid crystal display has compact, Low emissivity and the advantage such as power consumption is low, also therefore becomes existing market main flow.
Moreover, along with in recent years due to panel produce science and technology quick leap, the production cost of contact panel has been made significantly to reduce, therefore contact panel has been widely used on general consumption electronic product at present gradually, such as mobile phone mobile phone, digital camera, digital music player (MP3), personal digital aid (PDA) (PDA), the compact electric apparatus such as satellite navigator (GPS), on these electronic goods, the display screen that contact panel is configured in electrical equipment uses, to allow user carry out interactive input operation, and significantly improve between human and computer and link up the friendliness of interface, and promote input operation efficiency.
Dealer, in order under the application of the single power supply of mobile phone, solves power supply specifications for delivery in a big way, as 2.3V ~ 4.6V, and reduces the area of the driving chip driving display panel, and by proposing the type of drive that can meet two kinds of demands simultaneously.The data drive circuit (Source driver) of general display device has the mode of use operational amplifier (Op-amp) or electric resistance partial pressure to drive display panel.But, driving chip itself needs framework power-supply system and DC-DC converter (DC-DC converter), so, the framework of driving chip is not only complicated but also need external module, even arrive the image demand of more seniority or RGB tri-Ka agate (Gamma) curves and the used time, because Ka agate gray scale voltage increased number, and make numeral turn the area of mimic channel can rapid increase, and then increase the cost of driving chip.
Therefore, how for the problems referred to above, the driving circuit that a kind of novelty has the display panel that electric capacity drives to be proposed, the power-supply system of display device is made to be able to be simplified in the application of larger voltage range, and under the image demand of seniority, effectively reduce the area of data drive circuit, and then saving cost, make to solve the above problems.
Summary of the invention
An object of the present invention, be to provide a kind of driving circuit with the display panel that electric capacity drives, its mode driven by an electric capacity drives display panel, makes the area of effectively reduction data drive circuit under the image demand of seniority, and then saves cost.
An object of the present invention, is to provide a kind of driving circuit with the display panel that electric capacity drives, makes the power-supply system of display device be able to be simplified in the application of larger voltage range.
To achieve the above object, the present invention is a kind of driving circuit of the display panel utilizing electric capacity to drive, and it comprises:
One analog-to-digital conversion circuit, in order to change an input signal, and produces a digital signal;
One electric capacity, receives this digital signal, and produces a driving signal, to drive a display panel; And
One commutation circuit, switches signal, and control this analog-to-digital conversion circuit and transmit this digital signal to this electric capacity, or this electric capacity transmits this driving signal to this display panel according to one.
In the present invention, wherein this electric capacity drives this display panel to be the picture element electric capacity driving this display panel.
In the present invention, it more comprises:
One Ka agate circuit, produces according to a Ka Maqu line and transmits this input signal to this analog-to-digital conversion circuit.
In the present invention, it is applied to a data drive circuit of this display panel.
In the present invention, wherein a switching of this commutation circuit is frequency controlled in a sequential control circuit.
In the present invention, wherein this electric capacity is in time receiving this digital signal, and this digital signal charges to this electric capacity.
In the present invention, wherein this electric capacity is in time driving this display panel, and this driving signal discharges to display panel.
In the present invention, wherein this electric capacity is in time receiving this digital signal, and this electric capacity is coupled between a first end of this analog-to-digital conversion circuit and one second end.
In the present invention, wherein this electric capacity is in time driving this display panel, and this electric capacity is coupled between one the 3rd end of this analog-to-digital conversion circuit and this display panel.
In the present invention, it is the display panel being applied to hand-held device.
The beneficial effect that the present invention has: the driving circuit with the display panel that electric capacity drives provided by the invention, the mode driven by electric capacity drives display panel, make the area of effectively reduction data drive circuit under the image demand of seniority, and then save cost.Further, the power-supply system of display device is made to be able to be simplified in the application of larger voltage range.
Accompanying drawing explanation
Fig. 1 is the calcspar of the data drive circuit of a preferred embodiment of the present invention;
Fig. 2 is the parasitic RC equivalent electrical circuit of the source electrode line of display panel of the present invention;
Fig. 3 is the calcspar of the driver element of a preferred embodiment of the present invention;
Fig. 4 A is the action schematic diagram of the driver element of a preferred embodiment of the present invention; And
Fig. 4 B is the action schematic diagram of the driver element of another preferred embodiment of the present invention.
[figure number simple declaration]
The present invention:
1 data drive circuit 10 Ka agate circuit
12 first driver element 120 analog-to-digital conversion circuits
122 electric capacity 124 change-over switches
14 second driver element 16 the 3rd driver elements
18 four-wheel drive unit 20 display panels
200 resistance 202 electric capacity
Embodiment
For making to have a better understanding and awareness architectural feature of the present invention and effect of reaching, coordinating detailed description in order to preferred embodiment and accompanying drawing, being described as follows:
Referring to Fig. 1, is the calcspar of the data drive circuit for a preferred embodiment of the present invention.As shown in the figure, data drive circuit 1 comprises Ka agate (Gamma) circuit 10,1 first driver element 12,1 second driver element 14, the 3rd driver element 16 and a four-wheel drive unit 18.Ka agate circuit 10 produces plural input signal according to a Ka Maqu line, those input signals are the voltage signal on not coordination rank, and Ka agate circuit 10 transmits those input signal to the first driver element 12, second driver element 14, the 3rd driver element 16 and four-wheel drive unit 18.First driver element 12, second driver element 14, the 3rd driver element 16 and four-wheel drive unit 18 produce a driving signal according to a data signals and those input signals respectively, and transmit those driving signal to display panels 20, to drive display panel 20.Wherein, the first driver element 12, second driver element 14, the 3rd driver element 16 and four-wheel drive unit 18 produce respectively to drive signal and the often row picture element controlling display panel 20.
In addition, seeing also Fig. 2, is the parasitic RC equivalent electrical circuit of the source electrode line for display panel of the present invention.As shown in the figure, the picture element of the thin film transistor (TFT) (Thin-Flim Transistor, TFT) that the every one source pole in display panel is online can be equivalent to a resistance 200 and be series at an electric capacity 202.This technology all known for being familiar with this technical field personage, therefore no longer add to praise to state at this.
Referring to Fig. 3, is the calcspar of the driver element for a preferred embodiment of the present invention.As shown in the figure, the driver element of the display panel utilizing electric capacity to drive of the present invention comprises analog-to-digital conversion circuit 120, electric capacity 122 and a commutation circuit 124.Analog-to-digital conversion circuit 120 is in order to change input signal, and produce a digital signal, namely those input signals that Ka agate circuit 10 produces are received, and produce digital signal according to a data signals again, electric capacity 122 receives digital signal, and produce a driving signal, to drive display panel 20, commutation circuit 124 switches signal according to one, and control simulation digital conversion circuit 120 transmits digital signal to electric capacity 122, or control capacitance 122 transmits driving signal to display panel 20, namely commutation circuit 124 can receive the switching signal that a sequential control circuit (not shown) produces, and commutation circuit 124 can switch-capacitor 122 carries out charge and discharge according to switching signal, to drive display panel 20.So, the present invention drives display panel 20 by the mode of the driving of electric capacity 122, and avoid using the mode of operational amplifier or electric resistance partial pressure to drive display panel 20, make the area of effectively reduction data drive circuit under the image demand of seniority, and then save cost.Further, the power-supply system of display device is made to be able to be simplified in the application of larger voltage range.Be below for commutation circuit 124 how switch-capacitor 122, be described to drive display panel 20.
Seeing also Fig. 4 A and Fig. 4 B, is the action schematic diagram of the driver element for a preferred embodiment of the present invention.As shown in the figure, commutation circuit 124 is according to switching signal, and first switch-capacitor 122 receives the digital signal that analog-to-digital conversion circuit 120 produces, and analog-to-digital conversion circuit 120 is first charged to electric capacity 122, to produce driving signal.Namely analog-to-digital conversion circuit 120 comprises a first end, one second end and one the 3rd end.When analog-to-digital conversion circuit 120 pairs of electric capacity 122 charge, that electric capacity 122 couples between the first end of analog-to-digital conversion circuit 120 and the second end, as shown in Figure 4 A, make electric capacity 122 store electric charge and drive signal to produce, drive signal to display panel 20, to drive display panel 20 when commutation circuit 124 makes electric capacity 122 transmit according to switching signal.Namely according to switching signal, switch-capacitor 122 is coupled between the 3rd end of analog-to-digital conversion circuit 120 and display panel 20 commutation circuit 124, make electric charge stored by electric capacity 122 and the driving signal produced is sent to a storage capacitors (not shown) of display panel 20, to drive display panel 20.So, the present invention can avoid using the mode of operational amplifier or electric resistance partial pressure to drive display panel 20, makes the area of effectively reduction data drive circuit under the image demand of seniority, and then saves cost.Further, the power-supply system of display device is made to be able to be simplified in the application of larger voltage range.
In sum, the driving circuit of the display panel utilizing electric capacity to drive of the present invention, its by an analog-to-digital conversion circuit in order to change an input signal, and produce a digital signal, and transmit digital signal to electric capacity, to produce a driving signal, and drive a display panel; One commutation circuit controls this analog-to-digital conversion circuit according to a switching signal and transmits this digital signal to this electric capacity, or this electric capacity transmits this driving signal to this display panel.So, the mode driven by electric capacity drives display panel, makes the area of effectively reduction data drive circuit under the image demand of seniority, and then saves cost.Further, the power-supply system of display device is made to be able to be simplified in the application of larger voltage range.
In sum, be only a preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations of doing according to shape, structure, feature and the spirit described in the claims in the present invention scope change and modify, and all should be included in right of the present invention.
Claims (8)
1. a driving circuit for the display panel utilizing electric capacity to drive, it is characterized in that, it comprises:
One analog-to-digital conversion circuit, in order to change an input signal, and produces a digital signal;
One electric capacity, receives this digital signal, and produces a driving signal, to drive a display panel; And
One commutation circuit, switches signal, and control this analog-to-digital conversion circuit and transmit this digital signal to this electric capacity, or this electric capacity transmits this driving signal to this display panel according to one;
Wherein this electric capacity is in time receiving this digital signal, and this digital signal charges to this electric capacity, and this electric capacity is in time driving this display panel, and this driving signal discharges to display panel.
2. driving circuit according to claim 1, is characterized in that, wherein this electric capacity drives this display panel to be the picture element electric capacity driving this display panel.
3. driving circuit according to claim 1, is characterized in that, it more comprises:
One Ka agate circuit, produces according to a Ka Maqu line and transmits this input signal to this analog-to-digital conversion circuit.
4. driving circuit according to claim 1, is characterized in that, it is applied to a data drive circuit of this display panel.
5. driving circuit according to claim 1, is characterized in that, wherein a switching of this commutation circuit is frequency controlled in a sequential control circuit.
6. driving circuit according to claim 1, is characterized in that, wherein this electric capacity is in time receiving this digital signal, and this electric capacity is coupled between a first end of this analog-to-digital conversion circuit and one second end.
7. driving circuit according to claim 1, is characterized in that, wherein this electric capacity is in time driving this display panel, and this electric capacity is coupled between one the 3rd end of this analog-to-digital conversion circuit and this display panel.
8. driving circuit according to claim 1, is characterized in that, is the display panel being applied to hand-held device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133874.6A CN101783126B (en) | 2010-03-11 | 2010-03-11 | Display panel driving circuit with capacitance drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010133874.6A CN101783126B (en) | 2010-03-11 | 2010-03-11 | Display panel driving circuit with capacitance drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101783126A CN101783126A (en) | 2010-07-21 |
| CN101783126B true CN101783126B (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010133874.6A Expired - Fee Related CN101783126B (en) | 2010-03-11 | 2010-03-11 | Display panel driving circuit with capacitance drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101783126B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI546787B (en) * | 2014-09-29 | 2016-08-21 | 矽創電子股份有限公司 | Power supply module, display and related capacitance switching method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1276405C (en) * | 2003-04-29 | 2006-09-20 | 威盛电子股份有限公司 | Display device, display system and driving method thereof |
| JP2006276410A (en) * | 2005-03-29 | 2006-10-12 | Tohoku Pioneer Corp | Apparatus and method for driving light-emitting display panel |
| KR100658265B1 (en) * | 2005-08-10 | 2006-12-14 | 삼성에스디아이 주식회사 | Data driving circuit and driving method of light emitting display using the same |
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2010
- 2010-03-11 CN CN201010133874.6A patent/CN101783126B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101783126A (en) | 2010-07-21 |
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Granted publication date: 20150617 Termination date: 20200311 |
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