CN107347223A - TFT and AMOLED power circuit are supported simultaneously - Google Patents
TFT and AMOLED power circuit are supported simultaneously Download PDFInfo
- Publication number
- CN107347223A CN107347223A CN201610293491.2A CN201610293491A CN107347223A CN 107347223 A CN107347223 A CN 107347223A CN 201610293491 A CN201610293491 A CN 201610293491A CN 107347223 A CN107347223 A CN 107347223A
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- Prior art keywords
- inductance
- amoled
- power circuit
- tft
- output module
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/60—Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
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- Dc-Dc Converters (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention provides power circuit that is a kind of while supporting TFT and AMOLED.The power circuit includes white light-emitting diode drive module and single-inductance double-output module, and the single-inductance double-output module includes a booster, a charge pump and a reverse booster；When the power circuit is that TFT powers, external first inductance of white light-emitting diode drive module, external second inductance of the single-inductance double-output module and the first electric capacity, the single-inductance double-output module by the booster and the charge pump for TFT provide needed for power supply；When the power circuit is that AMOLED powers, external second electric capacity of white light-emitting diode drive module, external 3rd inductance of the single-inductance double-output module and the 4th inductance, the single-inductance double-output module by the booster and the reversely booster and and white light-emitting diode together for AMOLED provide needed for power supply.The present invention can reduce the area of power supply chip and the cost of peripheral circuit.
Description
Technical field
The present invention relates to power circuit technical field, more particularly to it is a kind of while support TFT's and AMOLED
Power circuit.
Background technology
Generally, TFT (Thin Film Transistor, thin film transistor (TFT)) needs+5.4V/-5.4V back of the body
Photoelectric source, AMOLED (Active-matrix organic light emitting diode, the organic hair of active matrix
Near-infrafed photodiodes) need three respectively+7.7V, -4V and+4.6V power supplys.
As shown in figure 1, if existing power supply chip will support TFT and AMOLED simultaneously, need to collect
Into 3 boosters (boost), a charge pump (charge pump) and a reverse booster (inverse
Boost), 3 inductance are needed to use when supporting AMOLED.
During the present invention is realized, inventor has found following technical problem in the prior art at least be present：
TFT and AMOLED power circuit is supported while existing, the area of power supply chip is larger, electricity
The cost of source chip and peripheral circuit is higher.
The content of the invention
Power circuit that is provided by the invention while supporting TFT and AMOLED, can reduce power supply chip
Area, reduce the cost of power supply chip and peripheral circuit.
The present invention provides power circuit that is a kind of while supporting TFT and AMOLED, including white luminous two
Pole pipe drive module and single-inductance double-output module, the single-inductance double-output module include a booster,
One charge pump and a reverse booster；
When the power circuit is that TFT powers, external first electricity of white light-emitting diode drive module
Sense, external second inductance of the single-inductance double-output module and the first electric capacity, the single-inductance double-output module
By the booster and the charge pump for TFT provide needed for power supply；
When the power circuit is that AMOLED powers, the white light-emitting diode drive module external the
Two electric capacity, external 3rd inductance of the single-inductance double-output module and the 4th inductance, the single-inductance double-output
Module by the booster and it is described reversely booster and and white light-emitting diode be AMOLED together
Power supply needed for offer.
Optionally, when the power circuit is that TFT powers, the single-inductance double-output module passes through described
Booster converts input voltage into positive first voltage value, by the charge pump by positive first electricity
Pressure value is converted to negative first voltage value.
Optionally, when the power circuit is that AMOLED powers, the white light-emitting diode drives mould
Block is converted to the input voltage positive second voltage value, and the single-inductance double-output module passes through the liter
Depressor is converted to the input voltage positive third voltage value, by the reversely booster by the input
Voltage conversion is the 4th negative magnitude of voltage.
Optionally, the input voltage is 3.2V~4.4V.
Optionally, the first voltage value is 5.4V.
Optionally, the second voltage value is 7.7V, and the third voltage value is 4.6V, the 4th voltage
It is worth for 4V.
Power circuit that is provided in an embodiment of the present invention while supporting TFT and AMOLED, using multiplexing mould
The mode of block builds while supports TFT and AMOLED power circuit, when being powered for TFT, single electricity
Sense dual output module by booster and charge pump for TFT provide needed for power supply, powered when for AMOLED
When, single-inductance double-output module by booster and reverse booster and and white light-emitting diode be together
Power supply needed for AMOLED offers, so as to reduce the area of power supply chip；During support AMOLED only
Using two inductance, so as to reduce the cost of peripheral circuit.
Brief description of the drawings
Fig. 1 is the structural representation for the power circuit for supporting TFT and AMOLED simultaneously in the prior art；
The structure of TFT and AMOLED power circuit is supported while Fig. 2 provides for one embodiment of the invention
Schematic diagram；
The knot of TFT and AMOLED power circuit is supported while Fig. 3 provides for another embodiment of the present invention
Structure schematic diagram.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that
Described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the institute that those of ordinary skill in the art are obtained under the premise of creative work is not made
There is other embodiment, belong to the scope of protection of the invention.
The present invention provides power circuit that is a kind of while supporting TFT and AMOLED, as shown in Figure 2 and Figure 3,
Power circuit that is described while supporting TFT and AMOLED includes white light-emitting diode drive module
(WLED) and single-inductance double-output module (SIDO), the single-inductance double-output module include a boosting
Device, a charge pump and a reverse booster；
When the power circuit is that TFT powers, as shown in Fig. 2 the white light-emitting diode drives mould
Block external first inductance L1, the external second inductance L2 and the first electric capacity C1 of single-inductance double-output module,
The single-inductance double-output module by the booster and the charge pump for TFT provide needed for power supply；
When the power circuit is that AMOLED powers, as shown in figure 3, the white light-emitting diode drives
Dynamic model block external second electric capacity C2, the external 3rd inductance L3 of the single-inductance double-output module and the 4th inductance
L4, the single-inductance double-output module pass through the booster and the reversely booster and and white luminous two
Pole pipe together for AMOLED provide needed for power supply.
Optionally, when the power circuit is that TFT powers, the single-inductance double-output module passes through described
Booster is converted to input voltage U0 positive first voltage value U1, will be described positive by the charge pump
First voltage value U1 is converted to negative first voltage value U1.
Optionally, when the power circuit is that AMOLED powers, the white light-emitting diode drives mould
Block is converted to the input voltage U0 positive second voltage value U2, and the single-inductance double-output module passes through
The booster is converted to the input voltage U0 positive third voltage value U3, passes through the reversely boosting
Device is converted to the input voltage U0 the 4th negative magnitude of voltage U4.
Optionally, the input voltage U0 is 3.2V~4.4V.
Optionally, the first voltage value U1 is 5.4V.
Optionally, the second voltage value U2 is 7.7V, and the third voltage value U3 is 4.6V, the described 4th
Magnitude of voltage U4 is 4V.
Power circuit that is provided in an embodiment of the present invention while supporting TFT and AMOLED, using multiplexing mould
The mode of block builds while supports TFT and AMOLED power circuit, when being powered for TFT, single electricity
Sense dual output module by booster and charge pump for TFT provide needed for power supply, powered when for AMOLED
When, single-inductance double-output module by booster and reverse booster and and white light-emitting diode be together
Power supply needed for AMOLED offers, so as to reduce the area of power supply chip；During support AMOLED only
Using two inductance, so as to reduce the cost of peripheral circuit.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited to
This, any one skilled in the art the invention discloses technical scope in, can readily occur in
Change or replacement, should all be included within the scope of the present invention.Therefore, protection scope of the present invention
It should be defined by scope of the claims.
Claims (6)
1. power circuit that is a kind of while supporting TFT and AMOLED, it is characterised in that sent out including white
Optical diode drive module and single-inductance double-output module, the single-inductance double-output module include a boosting
Device, a charge pump and a reverse booster；
When the power circuit is that TFT powers, external first electricity of white light-emitting diode drive module
Sense, external second inductance of the single-inductance double-output module and the first electric capacity, the single-inductance double-output module
By the booster and the charge pump for TFT provide needed for power supply；
When the power circuit is that AMOLED powers, the white light-emitting diode drive module external the
Two electric capacity, external 3rd inductance of the single-inductance double-output module and the 4th inductance, the single-inductance double-output
Module by the booster and it is described reversely booster and and white light-emitting diode be AMOLED together
Power supply needed for offer.
2. power circuit that is according to claim 1 while supporting TFT and AMOLED, its feature
It is, when the power circuit is that TFT powers, the single-inductance double-output module passes through the booster
Positive first voltage value is converted input voltage into, is turned the positive first voltage value by the charge pump
It is changed to negative first voltage value.
3. power circuit that is according to claim 2 while supporting TFT and AMOLED, its feature
It is, when the power circuit is that AMOLED powers, the white light-emitting diode drive module is by institute
State input voltage and be converted to positive second voltage value, the single-inductance double-output module will by the booster
The input voltage is converted to positive third voltage value, is turned the input voltage by the reversely booster
It is changed to the 4th negative magnitude of voltage.
4. power circuit that is according to claim 3 while supporting TFT and AMOLED, its feature
It is, the input voltage is 3.2V~4.4V.
5. power circuit that is according to claim 4 while supporting TFT and AMOLED, its feature
It is, the first voltage value is 5.4V.
6. power circuit that is according to claim 4 while supporting TFT and AMOLED, its feature
It is, the second voltage value is 7.7V, and the third voltage value is 4.6V, and the 4th magnitude of voltage is 4V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293491.2A CN107347223B (en) | 2016-05-05 | 2016-05-05 | The power circuit of TFT and AMOLED are supported simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293491.2A CN107347223B (en) | 2016-05-05 | 2016-05-05 | The power circuit of TFT and AMOLED are supported simultaneously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107347223A true CN107347223A (en) | 2017-11-14 |
| CN107347223B CN107347223B (en) | 2019-04-09 |
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ID=60253782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610293491.2A Active CN107347223B (en) | 2016-05-05 | 2016-05-05 | The power circuit of TFT and AMOLED are supported simultaneously |
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| Country | Link |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165999A (en) * | 2006-10-20 | 2008-04-23 | 恩益禧电子股份有限公司 | Voltage-booster power supply circuit |
| CN101842969A (en) * | 2007-12-28 | 2010-09-22 | 夏普株式会社 | Power supply circuit and display device including same |
| CN102376249A (en) * | 2010-08-20 | 2012-03-14 | 三星移动显示器株式会社 | Display apparatus and power supplying method performed by display apparatus |
| CN202309521U (en) * | 2011-09-23 | 2012-07-04 | 东南大学 | Control circuit for single-inductance dual-output switching power supply |
| CN104410276A (en) * | 2014-12-17 | 2015-03-11 | 矽力杰半导体技术(杭州)有限公司 | Voltage converting circuit based on single inductor and multiple outputs |
| CN105553256A (en) * | 2016-02-25 | 2016-05-04 | 京东方科技集团股份有限公司 | Charge pump circuit and display apparatus |
-
2016
- 2016-05-05 CN CN201610293491.2A patent/CN107347223B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165999A (en) * | 2006-10-20 | 2008-04-23 | 恩益禧电子股份有限公司 | Voltage-booster power supply circuit |
| CN101842969A (en) * | 2007-12-28 | 2010-09-22 | 夏普株式会社 | Power supply circuit and display device including same |
| CN102376249A (en) * | 2010-08-20 | 2012-03-14 | 三星移动显示器株式会社 | Display apparatus and power supplying method performed by display apparatus |
| CN202309521U (en) * | 2011-09-23 | 2012-07-04 | 东南大学 | Control circuit for single-inductance dual-output switching power supply |
| CN104410276A (en) * | 2014-12-17 | 2015-03-11 | 矽力杰半导体技术(杭州)有限公司 | Voltage converting circuit based on single inductor and multiple outputs |
| CN105553256A (en) * | 2016-02-25 | 2016-05-04 | 京东方科技集团股份有限公司 | Charge pump circuit and display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107347223B (en) | 2019-04-09 |
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