CN101673512A - Low power consumption driving device of AMOLED panel - Google Patents
Low power consumption driving device of AMOLED panel Download PDFInfo
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- CN101673512A CN101673512A CN200910309120A CN200910309120A CN101673512A CN 101673512 A CN101673512 A CN 101673512A CN 200910309120 A CN200910309120 A CN 200910309120A CN 200910309120 A CN200910309120 A CN 200910309120A CN 101673512 A CN101673512 A CN 101673512A
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- power consumption
- panel
- low power
- driving device
- conversion chip
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Abstract
The invention relates to the field of flat panel display technology, in particular to a low power consumption driving device of an AMOLED panel. The invention discloses a low power consumption drivingdevice of the AMOLED panel, aiming at solving the problems that the traditional driving device has high power consumption and short service life caused by heat emission. The low power consumption driving device has the key points of the technical scheme that the low power consumption driving device of the AMOLED panel comprises a DC/DC conversion chip, an OLED panel, an energy recovery circuit and a controller, wherein the energy recovery circuit is connected with the DC/DC conversion chip and the OLED panel; the controller is connected with the energy recovery circuit which recieves the output voltage of the DC/DC conversion chip of a signal control time division switch of the controller and provides sustaining voltage for the OLED panel. The device has the advantages of low power consumption, prolonging the service life of the AMOLED panel and being applicable to flat panel display.
Description
Technical field
The present invention relates to display technique field, plane, relate to the low power consumption driving device of AMOLED panel specifically.
Background technology
In order to drive AMOLED (active-matrix Organic Light Emitting Diode) panel, the driving voltage that needs has ELVDD and ELVSS (a following modulating voltage that all is called).These modulating voltages are to produce in that drive integrated circult is inner, and to each unit supply of panel, therefore need bigger electric current, and generalized case is that the outside is appended the voltage generation circuit of lighting a lamp separately and provided.The voltage generation circuit of lighting a lamp is to use the DC/DC conversion chip to finish, and it can be by regulating the size that duty is recently regulated output voltage, and the voltage of exporting from the DC/DC conversion chip uses as a modulating voltage.Adopt this mode, the power supply of each unit of panel can be met, but because the DC/DC conversion chip continue to be given the power supply of OLED (Organic Light Emitting Diode) panel, therefore causes power consumption big, and causes the heating of DC/DC conversion chip and reduction serviceable life.
Summary of the invention
Technical matters to be solved by this invention is: a kind of low power consumption driving device of AMOLED panel is provided, and it is big to solve traditional drive unit power consumption, because of heating causes the problem that serviceable life is short.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the low power consumption driving device of AMOLED panel, comprise DC/DC conversion chip, oled panel, energy recovery circuit and controller, described energy recovery circuit connects DC/DC conversion chip and oled panel, described controller connects energy recovery circuit, the be controlled by the controller output voltage of sweep frequency time-shared switch DC/DC conversion chip of coupling oled panel of described energy recovery circuit.
Described energy recovery circuit comprises first electronic switch, second electronic switch, first electric capacity and second electric capacity; The described first electronic switch input end connects the DC/DC conversion chip, and output terminal is by first capacity earth, and the connection oled panel; The described second electronic switch input end connects the DC/DC conversion chip, and output terminal is by second capacity earth, and the connection oled panel; The control end of described first electronic switch all is connected controller with the control end of second electronic switch.
Described first electronic switch, second electronic switch all adopt the contact-type electronic switch.
Described first electronic switch, second electronic switch all adopt contactless electronic beam switch.
Described contactless electronic beam switch is a metal-oxide-semiconductor, and the drain electrode of first metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by first capacity earth, and source electrode connects oled panel; The drain electrode of second metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by second capacity earth, and source electrode connects oled panel; The grid of first metal-oxide-semiconductor, second metal-oxide-semiconductor all connects clock oscillator.
Described controller is a clock oscillator.
The invention has the beneficial effects as follows: power consumption is little, prolong AMOLED panel serviceable life.
Description of drawings
Fig. 1 is the electrical block diagram of embodiment.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
The present invention has increased energy recovery circuit and controller on the basis of existing technology, switch motion by the switching device in the energy recovery circuit is to the output voltage time-shared switch of DC/DC conversion chip, and utilize the continuous charge and discharge of the electric capacity in the energy recovery circuit that oled panel is kept continued power, so just can reduce power consumption, also reduced thermal value from another point of view, prolonged the AMOLED panel effect in serviceable life thereby reach.
Embodiment:
The low power consumption driving device of the AMOLED panel in this example, comprise DC/DC conversion chip, oled panel, energy recovery circuit and controller, described energy recovery circuit connects DC/DC conversion chip and oled panel, described controller connects energy recovery circuit, the output voltage of the signal controlling time-shared switch DC/DC conversion chip of the controlled device of described energy recovery circuit, and provide continuous voltage for oled panel.Controller adopts clock oscillator.Described energy recovery circuit comprises the first metal-oxide-semiconductor a, the second metal-oxide-semiconductor c, the first electric capacity b and the second electric capacity d, and the drain electrode of the first metal-oxide-semiconductor a connects the DC/DC conversion chip, and source electrode is by the first electric capacity b ground connection, and source electrode connects oled panel; The drain electrode of the second metal-oxide-semiconductor c connects the DC/DC conversion chip, and source electrode is by the second electric capacity d ground connection, and source electrode connects oled panel; The grid of the first metal-oxide-semiconductor a, the second metal-oxide-semiconductor c all connects clock oscillator.
Its principle of work is: control the first metal-oxide-semiconductor a by the clock oscillator output switching signal, the conducting of the second metal-oxide-semiconductor c or end, thereby carry out the output voltage ELVDD1 of time-shared switch DC/DC conversion chip, ELVSS1, and to the first electric capacity b, the second electric capacity d fills, discharge, at the first metal-oxide-semiconductor a, during the second metal-oxide-semiconductor c cut-off state, be output voltage ELVDD1, when ELVSS1 disconnects, also can continue by the first electric capacity b, second electric capacity d discharge, output voltage ELVDD2, ELVSS2 carries out continued power to oled panel, reduced the power-on time of DC/DC conversion chip, promptly reduced power consumption, also bring the effect that reduces its heating, thereby increase the service life, the switching signal of the clock oscillator output here and the sweep frequency of oled panel will be mated.
First electronic switch among the present invention, second electronic switch also can adopt contact-type electronic switch (for example midget relay) except adopting noncontacting switch, also can adopt PLC control for controller.Metal-oxide-semiconductor adopts N raceway groove or P raceway groove all can.
Claims (6)
1.AMOLED the low power consumption driving device of panel, comprise DC/DC conversion chip, oled panel, it is characterized in that: also comprise energy recovery circuit and controller, described energy recovery circuit connects DC/DC conversion chip and oled panel, described controller connects energy recovery circuit, the be controlled by the controller output voltage of sweep frequency time-shared switch DC/DC conversion chip of coupling oled panel of described energy recovery circuit.
2. the low power consumption driving device of AMOLED panel as claimed in claim 1 is characterized in that: described energy recovery circuit comprises first electronic switch, second electronic switch, first electric capacity and second electric capacity; The described first electronic switch input end connects the DC/DC conversion chip, and output terminal is by first capacity earth, and the connection oled panel; The described second electronic switch input end connects the DC/DC conversion chip, and output terminal is by second capacity earth, and the connection oled panel; The control end of described first electronic switch all is connected controller with the control end of second electronic switch.
3. the low power consumption driving device of AMOLED panel as claimed in claim 2 is characterized in that: described first electronic switch, second electronic switch all adopt the contact-type electronic switch.
4. the low power consumption driving device of AMOLED panel as claimed in claim 2 is characterized in that: described first electronic switch, second electronic switch all adopt contactless electronic beam switch.
5. the low power consumption driving device of AMOLED panel as claimed in claim 4 is characterized in that: described contactless electronic beam switch is a metal-oxide-semiconductor, and the drain electrode of first metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by first capacity earth, and source electrode connects oled panel; The drain electrode of second metal-oxide-semiconductor connects the DC/DC conversion chip, and source electrode is by second capacity earth, and source electrode connects oled panel; The grid of first metal-oxide-semiconductor, second metal-oxide-semiconductor all connects clock oscillator.
6. as the low power consumption driving device of any described AMOLED panel of claim 1 to 5, it is characterized in that: described controller is a clock oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910309120A CN101673512A (en) | 2009-10-30 | 2009-10-30 | Low power consumption driving device of AMOLED panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910309120A CN101673512A (en) | 2009-10-30 | 2009-10-30 | Low power consumption driving device of AMOLED panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101673512A true CN101673512A (en) | 2010-03-17 |
Family
ID=42020714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910309120A Pending CN101673512A (en) | 2009-10-30 | 2009-10-30 | Low power consumption driving device of AMOLED panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101673512A (en) |
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2009
- 2009-10-30 CN CN200910309120A patent/CN101673512A/en active Pending
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Open date: 20100317 |