CN107347223B - The power circuit of TFT and AMOLED are supported simultaneously - Google Patents
The power circuit of TFT and AMOLED are supported simultaneously Download PDFInfo
- Publication number
- CN107347223B CN107347223B CN201610293491.2A CN201610293491A CN107347223B CN 107347223 B CN107347223 B CN 107347223B CN 201610293491 A CN201610293491 A CN 201610293491A CN 107347223 B CN107347223 B CN 107347223B
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- inductance
- amoled
- power circuit
- tft
- booster
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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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- 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 reversed 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 first capacitor, the single-inductance double-output module provide required power supply by the booster and the charge pump for TFT；When the power circuit is that AMOLED powers, external second capacitor of white light-emitting diode drive module, the external third inductance of the single-inductance double-output module and the 4th inductance, the single-inductance double-output module by the booster and the reversed booster and and white light-emitting diode provide required power supply together for AMOLED.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 fields, more particularly to a kind of power circuit for supporting TFT and AMOLED simultaneously.
Background technique
In general, TFT (Thin Film Transistor, thin film transistor (TFT)) needs the backlight electricity an of+5.4V/-5.4V
Source, AMOLED (Active-matrix organic light emitting diode, active matrix organic light-emitting diode)
Need three be respectively+7.7V, -4V and+4.6V power supply.
If needing to integrate 3 boosters as shown in Figure 1, existing power supply chip will support TFT and AMOLED simultaneously
(boost), a charge pump (charge pump) and a reversed booster (inverse boost), when supporting AMOLED
It needs using 3 inductance.
In the implementation of the present invention, inventor's discovery at least has the following technical problems in the prior art:
The power circuit of TFT and AMOLED is supported while existing, the area of power supply chip is larger, power supply chip and periphery
The higher cost of circuit.
Summary of the invention
Power circuit that is provided by the invention while supporting TFT and AMOLED, can reduce the area of power supply chip, 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 light-emitting diode drives mould
Block and single-inductance double-output module, the single-inductance double-output module include that a booster, a charge pump and one are reversed
Booster；
When the power circuit is that TFT powers, external first inductance of white light-emitting diode drive module is described
External second inductance of single-inductance double-output module and first capacitor, the single-inductance double-output module pass through the booster and institute
It states charge pump and provides required power supply for TFT；
When the power circuit is that AMOLED powers, external second capacitor of white light-emitting diode drive module,
The external third inductance of the single-inductance double-output module and the 4th inductance, the single-inductance double-output module pass through the booster
With the reversed booster and and white light-emitting diode provide required power supply together for AMOLED.
Optionally, when the power circuit is that TFT powers, the single-inductance double-output module will by the booster
Input voltage converts the first voltage value being positive, the positive the first voltage value conversion is negative by the charge pump first
Voltage value.
Optionally, when the power circuit is that AMOLED powers, the white light-emitting diode drive module will be described
Input voltage converts the second voltage value being positive, and the single-inductance double-output module passes through the booster for the input voltage
The third voltage value being positive is converted, the input voltage is converted by the 4th voltage value being negative by the reversed booster.
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, and the 4th voltage value is 4V.
Power circuit that is provided in an embodiment of the present invention while supporting TFT and AMOLED, the structure by the way of Multiplexing module
The power circuit for building while supporting TFT and AMOLED, when for TFT power supply, single-inductance double-output module passes through booster and electricity
Lotus pump provides required power supply for TFT, and when for AMOLED power supply, single-inductance double-output module passes through booster and reversed booster
And required power supply is provided for AMOLED together with white light-emitting diode, so as to reduce the area of power supply chip；It supports
Two inductance are only used when AMOLED, so as to reduce the cost of peripheral circuit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for supporting the power circuit of TFT and AMOLED simultaneously in the prior art；
The structural schematic diagram of the power circuit of TFT and AMOLED is supported while Fig. 2 provides for one embodiment of the invention；
Fig. 3 be another embodiment of the present invention provides while support TFT and AMOLED power circuit structural schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present 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, described to prop up simultaneously
The power circuit for holding TFT and AMOLED includes white light-emitting diode drive module (WLED) and single-inductance double-output module
(SIDO), the single-inductance double-output module includes a booster, a charge pump and a reversed booster；
When the power circuit is that TFT powers, as shown in Fig. 2, the white light-emitting diode drive module external the
One inductance L1, the external second inductance L2 and first capacitor C1 of single-inductance double-output module, the single-inductance double-output module
Required power supply is provided by the booster and the charge pump for TFT；
When the power circuit is that AMOLED powers, as shown in figure 3, the white light-emitting diode drive module is external
Second capacitor C2, the external third inductance L3 and the 4th inductance L4 of single-inductance double-output module, the single-inductance double-output mould
Block passes through the booster and the reversed booster simultaneously and white light-emitting diode provides required power supply together for AMOLED.
Optionally, when the power circuit is that TFT powers, the single-inductance double-output module will by the booster
Input voltage U0 converts the first voltage value U1 being positive, and the positive the first voltage value U1 conversion is negative by the charge pump
The first voltage value U1.
Optionally, when the power circuit is that AMOLED powers, the white light-emitting diode drive module will be described
Input voltage U0 converts the second voltage value U2 that is positive, and the single-inductance double-output module is by the booster by the input
Voltage U0 converts the third voltage value U3 being positive, input voltage U0 conversion is negative by the reversed booster the 4th
Voltage value 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 4th voltage value U4
For 4V.
Power circuit that is provided in an embodiment of the present invention while supporting TFT and AMOLED, the structure by the way of Multiplexing module
The power circuit for building while supporting TFT and AMOLED, when for TFT power supply, single-inductance double-output module passes through booster and electricity
Lotus pump provides required power supply for TFT, and when for AMOLED power supply, single-inductance double-output module passes through booster and reversed booster
And required power supply is provided for AMOLED together with white light-emitting diode, so as to reduce the area of power supply chip；It supports
Two inductance are only used when AMOLED, so as to reduce the cost of peripheral circuit.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (4)
1. a kind of power circuit for supporting TFT and AMOLED simultaneously, which is characterized in that including white light-emitting diode drive module
With single-inductance double-output module, the single-inductance double-output module includes a booster, a charge pump and a reversed liter
Depressor；
When the power circuit is that TFT powers, external first inductance of white light-emitting diode drive module, single electricity
Feel external second inductance of dual output module and first capacitor, the single-inductance double-output module will input electricity by the booster
The positive the first voltage value is converted the first voltage being negative by the charge pump by the first voltage value that pressure conversion is positive
Value；
When the power circuit is that AMOLED powers, external second capacitor of white light-emitting diode drive module is described
The external third inductance of single-inductance double-output module and the 4th inductance, the white light-emitting diode drive module are electric by the input
The second voltage value that pressure conversion is positive, the single-inductance double-output module are converted to the input voltage by the booster
The input voltage is converted the 4th voltage value being negative by the reversed booster by positive third voltage value.
2. power circuit that is according to claim 1 while supporting TFT and AMOLED, which is characterized in that the input electricity
Pressure is 3.2V~4.4V.
3. power circuit that is according to claim 2 while supporting TFT and AMOLED, which is characterized in that first electricity
Pressure value is 5.4V.
4. power circuit that is according to claim 2 while supporting TFT and AMOLED, which is characterized in that second electricity
Pressure value is 7.7V, and the third voltage value is 4.6V, and the 4th voltage value 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 CN107347223A (en) | 2017-11-14 |
| CN107347223B true CN107347223B (en) | 2019-04-09 |
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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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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 |
|---|---|
| CN107347223A (en) | 2017-11-14 |
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