CN105280126B - Display driver circuit - Google Patents
Display driver circuit Download PDFInfo
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- CN105280126B CN105280126B CN201410349163.0A CN201410349163A CN105280126B CN 105280126 B CN105280126 B CN 105280126B CN 201410349163 A CN201410349163 A CN 201410349163A CN 105280126 B CN105280126 B CN 105280126B
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Abstract
The invention discloses a kind of display driver circuits, and it includes a power circuit, a data drive circuit, a co-driver and a scan drive circuits.Power circuit generates a power signal.Data drive circuit couples power circuit, and exports complex data signal respectively to plural pixel according to power signal or a reference signal.Co-driver couples power circuit, and exports a common signals to plural pixel according to power signal or reference signal.Scan drive circuit controls plural pixel and receives complex data signal respectively to show a picture.
Description
Technical field
The present invention relates to the display driver circuits that a kind of display driver circuit more particularly to a kind of power saving design.
Background technique
Display is widely used to various electronic products or household appliance at present, moreover, with advances in technology with ring
The promotion of consciousness is protected, power and energy saving is design direction important at present.However, general display is in order to control the aobvious of plural pixel
Showing all needs design source electrode drive circuit, shared driving circuit and gate drive circuit, and source electrode drive circuit, shared driving circuit
The signal for exporting different levels respectively from gate drive circuit controls the display of plural pixel.For example, general display is in control
It all needs to generate display of five kinds of power supplys to drive plural pixel when plural pixel, in this way, any time of the display after unlatching,
Driving circuit all needs to generate five kinds of power supplys and drive the display of plural pixel.
Power supply is largely consumed in view of the display of the prior art, makes the advantage that display is of the invention compared with power and energy saving.
Summary of the invention
An object of the present invention is to provide a kind of display driver circuit, and power supply needed for reducing display is to reach province
The energy-efficient purpose of electricity.
To reach the above object, display driver circuit of the invention includes:.
One power circuit generates a power signal；
One data drive circuit couples the power circuit, exports respectively according to the power signal or a reference signal
Complex data signal is to plural pixel；
One co-driver couples the power circuit, according to the power signal or reference signal output one
Common signals are to the pixel；And
One scan drive circuit controls the pixel and receives the data signals respectively, to show a picture.
Display driver circuit according to the present invention, the data drive circuit, the co-driver and the scanning
Driving circuit couples the pixel, when the pixel, the pixel is connected in the plural number scanning signal of the scan drive circuit
When the data signals that reception is generated according to the power signal, what the pixel reception was generated according to the reference signal
The common signals.
Display driver circuit according to the present invention, when the picture is connected in the plural number scanning signal of the scan drive circuit
Element, when the pixel receives the data signals generated according to the reference signal, the pixel reception is according to the power supply
The common signals that signal generates.
Display driver circuit according to the present invention, when the data drive circuit is more described according to power signal output
Data signals, the co-driver export the common signals and the scan drive circuit according to the reference signal
When plural number scanning signal ends the pixel, the power circuit ends the power signal.
Display driver circuit according to the present invention, when the data drive circuit is more described according to reference signal output
Data signals, the co-driver export the common signals and the scan drive circuit according to the power signal
When plural number scanning signal ends the pixel, the power circuit ends the power signal.
Display driver circuit according to the present invention also includes:
Time schedule controller, one data time sequence signal of output have altogether with timing signal, a scanning sequence signal and a power supply
Timing signal, and control the data drive circuit, the co-driver, the scan drive circuit and power supply electricity
Road, to show the picture.
Display driver circuit according to the present invention, the data drive circuit includes:
One data storage element couples the sequence controller, shows data according to data time sequence signal storage one,
Signal is controlled to generate a data；
One data point reuse circuit, couples the data storage element, receives the data control signal and adjusts the number
According to control signal, signal is selected to generate a data；And
One data selection circuit couples the power circuit and the data point reuse circuit, receives the power signal, institute
Reference signal and data selection signal are stated, selects the power signal according to data selection signal or described with reference to news
Number, and the data signals are exported respectively to the pixel.
Display driver circuit according to the present invention, the co-driver includes:
One common selection circuit couples the power circuit and the sequence controller, receives the power signal, described
Reference signal and the common timing signal select the power signal according to the common timing signal or described with reference to news
Number, and the common signals are exported to the pixel.
Display driver circuit according to the present invention, the scan drive circuit includes:
One scanning storage element couples the sequence controller, and generates a scanning choosing according to the scanning sequence signal
Select signal；And
One scan selection circuit couples the power circuit and the scanning storage element, receives conducting a signal, one section
Only signal and the scanning select signal, select the conducting signal or the cut-off signal according to scanning selection signal,
And plural number scanning signal is exported respectively to the pixel.
Display driver circuit according to the present invention, the frame frequency of the picture be 30 hertz (Hz) below.
Display driver circuit according to the present invention, the reference signal are a ground connection level.
The beneficial effect for implementing display driver circuit of the invention is, when reference signal is not necessarily to be generated by power circuit,
But when being the ground connection level of circuit, then when plural pixel needs to change display state, display driver circuit of the invention is only
Power signal, conducting signal and cut-off three groups of power supplys of signal need to be generated；It completes and scans when the display state of plural pixel changes
After driving circuit ends plural pixel, display driver circuit of the invention only needs to generate power signal and ends two groups of electricity of signal
Source it can thus be appreciated that electrical source consumption can be greatly reduced in display driver circuit of the invention, and reaches the display driving of power saving design
Circuit.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the block diagram of the embodiment the invention shows driving circuit；
Fig. 2 is the block diagram of data selection circuit of the present invention, common choice circuit and the embodiment for scanning selection circuit；
Fig. 3 is the first waveform figure of data signals of the present invention and common signals；
Fig. 4 is the second waveform diagram of data signals of the present invention and common signals.
In figure:
10 pixels
20 display driver circuits
30 data drive circuits
31 data storage elements
33 data point reuse circuits
35 data selection circuits
40 co-drivers
41 common choice circuits
50 scan drive circuits
51 scanning storage elements
53 scan selection circuits
60 sequence controllers
61 display circuits
70 power circuits
A waveform
B waveform
The common timing signal of CT
DATA shows data
DT data time sequence signal
G1Scan line
GNScan line
PT power supply timing signal
RA reproducting periods
S31Data control signal
S33Data select signal
S51Scanning selection signal
SA waiting time
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The preferred embodiment of the present invention.
In order to feature of the invention and it is reached the effect of have a better understanding and awareness, careful assistant is with preferably real
Example and cooperation detailed description are applied, is illustrated as after:
Referring to Fig. 1, it is the block diagram of the embodiment the invention shows driving circuit 20.As shown, of the invention
Display driver circuit 20 include that a power circuit 70, a data drive circuit 30, a co-driver 40 and a scanning are driven
Dynamic circuit 50.Power circuit 70 generates a power signal SH.Data drive circuit 30 couples power circuit 70, and interrogates according to power supply
Number SHAn or reference signal SLComplex data signal S is exported respectivelyDTo plural pixel 10.Co-driver 40 couples power supply electricity
Road 70, and according to power signal SHOr reference signal SLExport a common signals SCTo plural pixel 10.Scan drive circuit 50 is controlled
It makes plural pixel 10 and receives complex data signal S respectivelyDTo show a picture.
Referring again to Fig. 1, display driver circuit 20 of the invention further includes time schedule controller 60.Sequence controller 60 couples
Plural pixel 10 is to drive plural pixel 10, and sequence controller 60 is used for controlling power circuit 70, data drive circuit 30, is total to
With the working sequence of driving circuit 40 and scan drive circuit 50, so sequence controller 60 exports a data time sequence signal respectively
DT to data drive circuit 30, altogether with timing signal CT to co-driver 40, a scanning sequence signal ST to scan drive
Dynamic circuit 50 and a power supply timing signal PT control data drive circuit 30, co-driver 40, sweep to power circuit 70
It retouches driving circuit 50 and power circuit 70 in time works, normally to show picture.
Data drive circuit 30 couples plural pixel 10 to drive plural pixel 10, and data drive circuit 30 includes one
Data storage element 31, a data point reuse circuit 33 and a data selection circuit 35.Data storage element 31 couples timing control
Device 60 simultaneously receives data time sequence signal DT, and data time sequence signal DT control data storage element 31 starts one display number of storage
According to DATA, data storage element 31 generates a data according to display data DATA again and controls signal S31.In other words, data storage list
Member 31 couples sequence controller 60, and according to one display data DATA of data time sequence signal DT storage, to generate data control news
Number S31, wherein display data DATA is to be provided by a display circuit 61 or an external circuit and be stored in data storage element 31
It is interior, therefore the present invention is not limiting as display data DATA and must be provided by which circuit.Data point reuse circuit 33 couples data
Storage element 31 simultaneously receives data control signal S31, the adjustment data control of data point reuse circuit 33 signal S31After generate a data
Select signal S33, wherein data point reuse circuit 33 can be position adjuster (Level shifter) surely, so data point reuse
The adjustable data of circuit 33 control signal S31Level.
Data selection circuit 35 couples power circuit 70 and data point reuse circuit 33, in this way, data selection circuit 35 receives
Power signal SH, reference signal SLAnd data select signal S33Afterwards, signal S is selected according to data33Select power signal SHOr ginseng
Examine signal SL, therefore data selection circuit 35 is according to power signal SHOr reference signal SLAnd export complex data signal SDTo again
Number pixel 10.Therefore data drive circuit 30 is according to data time sequence signal DT output data signal SD, wherein data selection circuit
35 can be a multiplexer (multiplexer), and reference signal SLIt can be generated by power circuit 70, or be circuit
It is grounded level.
Referring again to Fig. 1, scan drive circuit 50 couples plural pixel 10 to drive plural pixel 10, scan drive circuit 50
For controlling the on or off of pixel 10, in this way, plural pixel 10 can carry out the change of display state under on state,
And scan drive circuit 50 of the invention includes a scanning storage element 51 and a scan selection circuit 53.Scan storage element 51
Coupling sequence controller 60 simultaneously receives scanning sequence signal ST, and scanning storage element 51 is swept according to scanning sequence signal ST generation
Retouch selection signal S51.Scan selection circuit 53 couples power circuit 70 and scanning storage element 51, in this way, scan selection circuit
53 receive conducting signal VH, cut-off signal VLAnd scanning selection signal S51Afterwards, scan selection circuit 53 selects signal according to scanning
S51Selection conducting signal VHOr cut-off signal VL, therefore scan selection circuit 53 is according to conducting signal VHOr cut-off signal VLAnd divide
It Shu Chu not plural number scanning signal SSTo plural pixel 10.Therefore scan drive circuit 50 exports plural number according to scanning sequence signal ST
Scan signal SS.Wherein, scanning storage element 51 can be a shift register (shifter register), scanning selection electricity
Road 53 can be a multiplexer (multiplexer).
Referring to Fig. 2, it is data selection circuit 35 of the present invention, common choice circuit 41 and scans the one of selection circuit 53
The block diagram of embodiment.As shown, co-driver 40 of the invention is such as data drive circuit 30 and turntable driving electricity
Road 50, co-driver 40 also include a selection circuit, i.e. common choice circuit 41 shown in Fig. 2.Common choice circuit 41
Power circuit 70 and sequence controller 60 are coupled, and receives power signal SH, reference signal SLAnd common timing signal CT, jointly
Selection circuit 41 selects power signal S according to common timing signal CTHOr reference signal SL, in this way, 41 foundation of common choice circuit
Power signal SHOr reference signal SLAnd export common signals SCTo plural pixel 10.Therefore co-driver 40 according to it is common when
Sequence signal CT exports common signals SC.Wherein, common choice circuit 41 equally can be a multiplexer (multiplexer).
Referring again to Fig. 1 and Fig. 2, after display is opened, it is multiple to control that scan drive circuit 50 can scan plural pixel 10
The on or off of number pixel 10.That is, scan drive circuit 50 divides when plural pixel 10 needs to change display state
It Shu Chu not plural number scanning signal SSTo plural pixel 10 plural pixel 10 is connected, so plural number pixel 10 can use number respectively
According to signal SDAnd common signals SCTo show picture.For example, the display display shape to be changed of a display black and white screen
State, data drive circuit 30 is according to power signal SHExport complex data signal SD, co-driver 40 is according to reference signal SL
Export common signals SC, then plural pixel 10 is received according to power signal SHThe data signals S of generationD(for example, high levle is interrogated
Number), and receive according to reference signal SLThe common signals S of generationC(for example, low level signal).
Conversely, when data drive circuit 30 is according to reference signal SLOutput data signal SD, co-driver 40 is according to electricity
Source signal SHExport common signals SCWhen, then plural pixel 10 is received according to reference signal SLThe data signals S of generationD(such as
For low level signal), and receive according to power signal SHThe common signals S of generationC.In addition, plural pixel 10 can also receive phase
With the data signals S of levelDAnd common signals SC, in other words, the present invention is not limiting as data signals S in scan cycleDAnd
Common signals SCLevel must be fixed as power signal SHOr it is fixed as reference signal SL, such as: as common signals SCFor Gao Zhun
Position (for example, power signal SH) when, output to the first scan line G1Data signals SDIt can be low level (for example, with reference to news
Number SL), output to N scan line GNData signals SDIt can be high levle (for example, power signal SH).In this way, of the invention
Plural pixel 10 because of data signals SDAnd common signals SCLevel change and can show black picture, white picture or
Chequered with black and white picture.
Accept above-mentioned, data signals SDIt is to be exported by data selection circuit 35, common signals SCIt is by common choice circuit 41
Output, and data selection circuit 35 and common selection circuit 41 are all according to power signal SHAnd reference signal SLDetermination data news
Number SDWith common signals SC, so display driver circuit 20 of the invention only needs when plural pixel 10 needs to change display state
Generate power signal SH, reference signal SL, conducting signal VHAnd cut-off signal VLFour groups of power supplys.However, working as reference signal SLIt is not necessarily to
Generated by power circuit 70, but be circuit ground connection level when, then when plural pixel 10 needs to change display state, this
The display driver circuit 20 of invention only needs to generate power signal SH, conducting signal VHAnd cut-off signal VLThree groups of power supplys.
Furthermore when the display state of plural pixel 10 change completion and scan drive circuit 50 ends plural pixel 10
Afterwards, display driver circuit 20 of the invention only needs to generate power signal SHAnd cut-off signal VLTwo groups of power supplys.It can thus be appreciated that of the invention
Display driver circuit 20 electrical source consumption can be greatly reduced, and reach power saving design display driver circuit 20.
Referring to Fig. 3, it is data signals S of the present inventionDAnd common signals SCFirst waveform figure.As shown, scanning choosing
It selects circuit 53 and scans plural scan line G in reproducting periods RA1…GN, and when common choice circuit 41 exports the common news of high levle
Number SCWhen, data selection circuit 35 selects signal S according to data33Export the data signals S of high or low levelD, such as: Fig. 3's
Shown in waveform A, when common choice circuit 41 exports the common signals S of high levleCWhen, data selection circuit 35 is selected according to data
Select signal S33Export the data signals S of low levelDTo the first scan line G1And data selection circuit 35 selects signal according to data
S33Export the data signals S of high levleDTo N scan line GN。
Accept it is above-mentioned, such as: shown in the waveform B of Fig. 3, when common choice circuit 41 export low level common signals SC
When, data selection circuit 35 selects signal S according to data33Export the data signals S of high levleDTo the first scan line G1, and number
Signal S is selected according to data according to selection circuit 3533Export the data signals S of low levelDTo N scan line GN.However, in waiting
Period SA scan selection circuit 53 does not scan plural scan line G1…GN, so only in waiting time SA display driver circuit 20
Power signal S need to be generatedH, reference signal SLAnd cut-off signal VLThree groups of power supplys.In addition, if reference signal SLFor the ground connection of circuit
Level then only needs to generate power signal S in waiting time SA display driver circuit 20HAnd cut-off signal VLTwo groups of power supplys.
Referring to Fig. 4, it is data signals S of the present inventionDAnd common signals SCThe second waveform diagram.As shown, Fig. 4 wave
Shape figure and the difference of Fig. 3 waveform diagram are that display driver circuit 20 does not generate power signal S in waiting time SAH, also
It is to say, display driver circuit 20 only needs to generate cut-off signal V in waiting time SALOne group of power supply.
Based on above-mentioned, of the invention display driver circuit 20 without gamma circuitry, and can be in data drive circuit 30
Replace digital analog converter and operational amplifier using data selection circuit 35.In addition, display driver circuit 20 of the invention
Preferred application product can for electric label, shelf label, smartwatch and other be used to show the product of article message,
In, show that the frame frequency of picture is preferably 30 hertz (Hz) below.
In conclusion display driver circuit of the invention includes a power circuit, a data drive circuit, a common driving
Circuit and a scan drive circuit.Power circuit generates a power signal.Data drive circuit couples power circuit, and according to electricity
Source signal or a reference signal export complex data signal to plural pixel respectively.Co-driver couples power circuit, and
A common signals are exported to plural pixel according to power signal or reference signal.Scan drive circuit controls plural pixel and connects respectively
Number data signals are recovered to show a picture.
Only as described above, only one embodiment of the invention is not used to limit the scope of implementation of the present invention, therefore lifts
It is all according to construction, feature described in scope of the present invention patent and the equivalent changes and modifications carried out by spirit, should be included in this
In the claim of invention.
Claims (9)
1. a kind of display driver circuit, it includes:
One power circuit generates a power signal；
One data drive circuit couples the power circuit, exports plural number respectively according to the power signal or a reference signal
Data signals are to plural pixel；
One co-driver couples the power circuit, common according to the power signal or reference signal output one
Signal is to the pixel；And
One scan drive circuit controls the pixel and receives the data signals respectively, to show a picture；
Time schedule controller, one data time sequence signal of output have altogether with timing signal, a scanning sequence signal and a power supply timing
Signal, and the data drive circuit, the co-driver, the scan drive circuit and the power circuit are controlled,
To show the picture；
The scan drive circuit includes:
One scanning storage element couples the sequence controller, and generates a scanning selection news according to the scanning sequence signal
Number；And
One scan selection circuit couples the power circuit and the scanning storage element, receives a conducting signal, a cut-off news
Number and the scanning select signal, according to the scanning selection signal selection conducting signal or cut-off signal, and divide
Signal plural Shu Chu not be scanned to the pixel；Wherein,
When the plural number pixel needs to change display state, the display driver circuit only generates the power signal, described
Reference signal, the conducting signal and described four groups of power supplys of cut-off signal；
When the reference signal by the power circuit without being generated but for the ground connection level of circuit and when the plural pixel
When needing to change display state, the display driver circuit only generates the power signal, the conducting signal and the cut-off
Three groups of power supplys of signal；
After the display state of the plural number pixel changes completion and the scan drive circuit makes plural pixel cut-off, institute
It states display driver circuit and only generates the power signal, the reference signal and described three groups of power supplys of cut-off signal.
2. display driver circuit according to claim 1, which is characterized in that the data drive circuit, the common drive
Dynamic circuit and the scan drive circuit couple the pixel, described in the plural number scanning signal conducting of the scan drive circuit
Pixel, when the pixel receives the data signals generated according to the power signal, the pixel reception is according to the ginseng
Examine the common signals of signal generation.
3. display driver circuit according to claim 1, which is characterized in that when the plural number scanning of the scan drive circuit
Signal is connected the pixel, and when the pixel receives the data signals generated according to the reference signal, the pixel is connect
Receive the common signals generated according to the power signal.
4. display driver circuit according to claim 1, which is characterized in that when the data drive circuit is according to the electricity
Source signal exports the data signals, the co-driver and exports the common signals and institute according to the reference signal
When stating the plural number scanning signal cut-off pixel of scan drive circuit, the power circuit ends the power signal.
5. display driver circuit according to claim 1, which is characterized in that when the data drive circuit is according to the ginseng
It examines signal and exports the data signals, the co-driver according to the power signal output common signals and institute
When stating the plural number scanning signal cut-off pixel of scan drive circuit, the power circuit ends the power signal.
6. display driver circuit according to claim 1, which is characterized in that the data drive circuit includes:
One data storage element couples the sequence controller, according to one display data of data time sequence signal storage, to produce
A raw data control signal；
One data point reuse circuit, couples the data storage element, receives the data control signal and adjusts the data control
Signal processed selects signal to generate a data；And
One data selection circuit couples the power circuit and the data point reuse circuit, receives the power signal, the ginseng
Signal and data selection signal are examined, selects the power signal or the reference signal according to data selection signal,
And the data signals are exported respectively to the pixel.
7. display driver circuit according to claim 6, which is characterized in that the co-driver includes:
One common selection circuit couples the power circuit and the sequence controller, receives the power signal, the reference
Signal and the common timing signal select the power signal or the reference signal according to the common timing signal, and
The common signals are exported to the pixel.
8. display driver circuit according to claim 6, which is characterized in that the frame frequency of the picture is 30 hertz
(Hz) below.
9. display driver circuit according to claim 1, which is characterized in that the reference signal is a ground connection level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410349163.0A CN105280126B (en) | 2014-07-22 | 2014-07-22 | Display driver circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410349163.0A CN105280126B (en) | 2014-07-22 | 2014-07-22 | Display driver circuit |
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| Publication Number | Publication Date |
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| CN105280126A CN105280126A (en) | 2016-01-27 |
| CN105280126B true CN105280126B (en) | 2018-12-21 |
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| KR101134640B1 (en) * | 2005-08-05 | 2012-04-09 | 삼성전자주식회사 | Liquid crystal display and driving method for the same |
| KR20080011896A (en) * | 2006-08-01 | 2008-02-11 | 삼성전자주식회사 | Gate on voltage generation circuit and gate off voltage generation circuit and liquid crystal display having the same |
| KR101354347B1 (en) * | 2008-08-26 | 2014-01-23 | 엘지디스플레이 주식회사 | Liquid Crystal Display and Driving Method thereof |
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| CN1345023A (en) * | 2000-09-18 | 2002-04-17 | 三洋电机株式会社 | Display and its drive method |
| JP2004361691A (en) * | 2003-06-05 | 2004-12-24 | Matsushita Electric Ind Co Ltd | Planar image display device |
| CN1641728A (en) * | 2003-12-26 | 2005-07-20 | 卡西欧计算机株式会社 | Display drive device and display apparatus having same |
| JP2007248800A (en) * | 2006-03-16 | 2007-09-27 | Casio Comput Co Ltd | Display device and its driving control method |
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