CN113948042A - OLED power saving circuit and method - Google Patents
OLED power saving circuit and method Download PDFInfo
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- CN113948042A CN113948042A CN202111369546.0A CN202111369546A CN113948042A CN 113948042 A CN113948042 A CN 113948042A CN 202111369546 A CN202111369546 A CN 202111369546A CN 113948042 A CN113948042 A CN 113948042A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The invention discloses an OLED power saving circuit, which relates to the field of OLEDs and comprises: the power supply module is used for outputting direct current to supply the pure color detection module and the switch control module; the pure color detection module is used for detecting whether the display data is a pure color graph or not; the switch control module is used for stopping when the display data is a pure-color graph; when the display data is a color graph, the switch control module is conducted; the charge sharing module is used for controlling the MUX to share the charges in advance when the switch control module is conducted, so that the voltages of the R/G/B pixels tend to be consistent in advance; compared with the prior art, the invention has the beneficial effects that: the invention distinguishes static pure color patterns and dynamic color patterns by a smarter advance judgment mechanism, and gives different MUX control behaviors respectively, thereby showing another additional power saving mechanism for OLED display.
Description
Technical Field
The invention relates to the field of OLEDs, in particular to an OLED power saving circuit and method.
Background
In general, the OLED display panel uses 1 pair of multi-MUX (1 vs 3 or 6 vs 12) to time-share and output the R/G/B voltage to the corresponding sub-pixel; at the beginning of each LINE, the MUX of R/G/B will be turned on for charge sharing at the same time to make the voltages of the three R/G/B pixels consistent in advance, as shown in FIG. 1.
However, when the R/G/B voltage output by the OLED has a large difference and the target value of the R/G/B voltage for the next charging is not changed much, as shown in fig. 2, the pre-charge sharing will take more pixel charging time and consume more power, and needs to be improved.
Disclosure of Invention
The present invention is directed to an OLED power saving circuit and method to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
an OLED power saving circuit comprising:
the power supply module is used for outputting direct current to supply the pure color detection module and the switch control module;
the pure color detection module is used for detecting whether the display data is a pure color graph or not;
the switch control module is used for stopping when the display data is a pure-color graph; when the display data is a color graph, the switch control module is conducted;
the charge sharing module is used for controlling the MUX to share the charges in advance when the switch control module is conducted, so that the voltages of the R/G/B pixels tend to be consistent in advance;
the power supply module is connected with the pure color detection module and the switch control module, the pure color detection module is connected with the switch control module, and the switch control module is connected with the charge sharing module.
As a still further scheme of the invention: the switch control module comprises a resistor R1, a triode V1, a triode V2 and an MOS tube V3, a pure color signal is input to the base electrode of the triode V1, the collector electrode of the triode V1 is connected with the power supply module through a resistor R1, the emitter electrode of the triode V1 is connected with the G electrode of the MOS tube V3, the D electrode of the MOS tube V3 is connected with the charge sharing module, the S electrode of the MOS tube V3 is connected with the emitter electrode of the triode V2, the base electrode of the triode V2 is connected with the power supply module, and the collector electrode of the triode V2 is connected with the power supply module.
An OLED power saving method is applied to the OLED power saving circuit, and comprises the following steps: step 1: inputting display data; step 2: detecting whether the display data is a pure color pattern; and step 3: when the display data is a pure color pattern, charge sharing is not performed in advance, and when the display data is a color pattern, charge sharing is performed in advance.
As a still further scheme of the invention: and (5) outputting the display data to the pure color detection module in the step (1).
As a still further scheme of the invention: in step 2, the pure color detection module detects whether the display data is a pure color static image, wherein the pure color image comprises pure red, pure green, pure blue, pure white, pure black and other single gray scales.
As a still further scheme of the invention: controlling MUX not to share the electric charge when the display data is the pure color graph in step 3; when the display data is color graphics, the MUX is controlled to pre-perform charge sharing.
Compared with the prior art, the invention has the beneficial effects that: the invention distinguishes static pure color patterns and dynamic color patterns by a smarter advance judgment mechanism, and gives different MUX control behaviors respectively, thereby showing another additional power saving mechanism for OLED display.
Drawings
Fig. 1 is a MUX operating schematic.
FIG. 2 is a schematic diagram of the MUX used when the R/G/B voltage difference is large.
FIG. 3 is a schematic diagram of an OLED power saving circuit.
FIG. 4 is a flowchart of an OLED power saving method.
FIG. 5 is a schematic diagram of the R/G/B voltage difference is large without using MUX.
Fig. 6 is a circuit diagram of the switch control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 3 and 6, an OLED power saving circuit includes:
the power supply module is used for outputting direct current to supply the pure color detection module and the switch control module;
the pure color detection module is used for detecting whether the display data is a pure color graph or not;
the switch control module is used for stopping when the display data is a pure-color graph; when the display data is a color graph, the switch control module is conducted;
the charge sharing module is used for controlling the MUX to share the charges in advance when the switch control module is conducted, so that the voltages of the R/G/B pixels tend to be consistent in advance;
the power supply module is connected with the pure color detection module and the switch control module, the pure color detection module is connected with the switch control module, and the switch control module is connected with the charge sharing module.
In this embodiment: referring to fig. 6, the switch control module includes a resistor R1, a transistor V1, a transistor V2, and a MOS transistor V3, wherein a base of the transistor V1 inputs a pure color signal, a collector of the transistor V1 is connected to the power supply module through a resistor R1, an emitter of the transistor V1 is connected to a G pole of the transistor V3, a D pole of the transistor V3 is connected to the charge sharing module, an S pole of the transistor V3 is connected to an emitter of the transistor V2, a base of the transistor V2 is connected to the power supply module, and a collector of the transistor V2 is connected to the power supply module.
The MOS tube V3 is a PMOS tube, when the G-pole voltage is at a high level, the MOS tube V3 is not conducted, the triode V1 amplifies a pure color signal, therefore, when the pure color signal is input, the G-pole voltage of the MOS tube V3 is at a high level, the MOS tube V3 is not conducted, the charge sharing module does not work, when a color signal is input, the G-pole voltage of the MOS tube V3 is at a low level, the MOS tube V3 is conducted, and the charge sharing module controls the MUX to enable the MUX to share the pre-made charge.
Referring to fig. 4, an OLED power saving method applied to the OLED power saving circuit includes: step 1: inputting display data; step 2: detecting whether the display data is a pure color pattern; and step 3: when the display data is a pure color pattern, charge sharing is not performed in advance, and when the display data is a color pattern, charge sharing is performed in advance.
In this embodiment: referring to fig. 4, the display data in step 1 is output to the pure color detection module.
In this embodiment: referring to fig. 4, in step 2, the pure color detection module detects whether the display data is a pure color static image, where the pure color image includes pure red, pure green, pure blue, pure white, pure black, and other single gray scales.
In this embodiment: referring to fig. 4, when the data displayed in step 3 is a pure color image, the MUX is controlled not to share the charges; when the display data is color graphics, the MUX is controlled to pre-perform charge sharing.
In the method of the embodiment of the invention, as shown in fig. 5, when the voltage difference of the three pixels of R/G/B is too large, the charge sharing of the MUX is turned off, and when the voltage difference of the three pixels of R/G/B is smaller, the charge sharing of the MUX is turned on.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An OLED power saving circuit, characterized in that:
the OLED power saving circuit includes:
the power supply module is used for outputting direct current to supply the pure color detection module and the switch control module;
the pure color detection module is used for detecting whether the display data is a pure color graph or not;
the switch control module is used for stopping when the display data is a pure-color graph; when the display data is a color graph, the switch control module is conducted;
the charge sharing module is used for controlling the MUX to share the charges in advance when the switch control module is conducted, so that the voltages of the R/G/B pixels tend to be consistent in advance;
the power supply module is connected with the pure color detection module and the switch control module, the pure color detection module is connected with the switch control module, and the switch control module is connected with the charge sharing module.
2. The OLED power saving circuit of claim 1, wherein the switch control module comprises a resistor R1, a transistor V1, a transistor V2, and a transistor V3, wherein a base of the transistor V1 inputs a pure color signal, a collector of the transistor V1 is connected to the power supply module through a resistor R1, an emitter of the transistor V1 is connected to a G pole of the transistor V3, a D pole of the transistor V3 is connected to the charge sharing module, an S pole of the transistor V3 is connected to an emitter of the transistor V2, a base of the transistor V2 is connected to the power supply module, and a collector of the transistor V2 is connected to the power supply module.
3. An OLED power saving method applied to the OLED power saving circuit as claimed in any one of claims 1 and 2, the method comprising: step 1: inputting display data; step 2: detecting whether the display data is a pure color pattern; and step 3: when the display data is a pure color pattern, charge sharing is not performed in advance, and when the display data is a color pattern, charge sharing is performed in advance.
4. The OLED power saving method of claim 3, wherein the display data in step 1 is outputted to the pure color detection module.
5. The OLED power saving method of claim 3, wherein the pure color detection module in step 2 detects whether the display data is a pure static pattern, the pure color pattern includes pure red, pure green, pure blue, pure white, pure black and other single gray scales.
6. The OLED power saving method of claim 3, wherein in step 3, when the display data is a pure color image, the MUX is controlled not to share the charge; when the display data is color graphics, the MUX is controlled to pre-perform charge sharing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111369546.0A CN113948042A (en) | 2021-11-16 | 2021-11-16 | OLED power saving circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111369546.0A CN113948042A (en) | 2021-11-16 | 2021-11-16 | OLED power saving circuit and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866590A (en) * | 2010-04-26 | 2010-10-20 | 友达光电股份有限公司 | Display, display driving method and source driving circuit |
| CN103093732A (en) * | 2012-10-17 | 2013-05-08 | 友达光电股份有限公司 | Driving device and display device |
| CN103745697A (en) * | 2013-10-18 | 2014-04-23 | 友达光电股份有限公司 | Charge sharing control method and display panel |
| CN106019743A (en) * | 2016-06-15 | 2016-10-12 | 京东方科技集团股份有限公司 | Array substrate, method for driving array substrate, and relevant devices |
| CN106875896A (en) * | 2017-04-28 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of source drive IC, display device and its driving method |
-
2021
- 2021-11-16 CN CN202111369546.0A patent/CN113948042A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866590A (en) * | 2010-04-26 | 2010-10-20 | 友达光电股份有限公司 | Display, display driving method and source driving circuit |
| CN103093732A (en) * | 2012-10-17 | 2013-05-08 | 友达光电股份有限公司 | Driving device and display device |
| CN103745697A (en) * | 2013-10-18 | 2014-04-23 | 友达光电股份有限公司 | Charge sharing control method and display panel |
| CN106019743A (en) * | 2016-06-15 | 2016-10-12 | 京东方科技集团股份有限公司 | Array substrate, method for driving array substrate, and relevant devices |
| CN106875896A (en) * | 2017-04-28 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of source drive IC, display device and its driving method |
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