CN106157917A - A kind of drive device for display that can reduce power consumption and driving method thereof - Google Patents
A kind of drive device for display that can reduce power consumption and driving method thereof Download PDFInfo
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- CN106157917A CN106157917A CN201610799688.3A CN201610799688A CN106157917A CN 106157917 A CN106157917 A CN 106157917A CN 201610799688 A CN201610799688 A CN 201610799688A CN 106157917 A CN106157917 A CN 106157917A
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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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
- G09G2310/00—Command of the display device
- G09G2310/04—Partial updating of the display screen
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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
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Abstract
The present invention provides a kind of drive device for display that can reduce power consumption and driving method thereof, relates to display actuation techniques field.In order to solve existing display when the static face of display, the problem that refresh activity can cause a large amount of power consumption penalty, the present invention proposes a kind of drive device for display that can reduce power consumption and driving method, on the basis of traditional F an Out Area (fan-out area), utilize MOS to separate OE output and enable the connection of signal and S COF, be controlled by TCON, only carry out refresh activity when dynamic menu, and do not carry out refresh activity when showing tableaux, do not result in the loss of power consumption.Finally realize the effect that selectivity refreshes, reduce power consumption.And extra equipment cost, improving product competitiveness will not be increased.The present invention can apply in the driving of TFT LCD designs.
Description
Technical field
The invention belongs to display actuation techniques field, particularly relate to a kind of drive device for display that can reduce power consumption
And driving method.
Background technology
LCD (abbreviation of Liquid Crystal Display) liquid crystal display.
The structure of LCD is placement liquid crystal cell in the middle of the glass substrate that two panels is parallel, lower baseplate glass arranges TFT (thin
Film transistor), upper substrate glass arranges colored filter, controls liquid crystal molecule by the signal on TFT with voltage change
Rotation direction, thus reach to control each pixel polarized light outgoing and whether reach to show purpose.
From the point of view of the structure of liquid crystal display, either notebook computer or desktop system, the LCD display of employing is all
The hierarchy being made up of different piece.
LCD is made up of two pieces of glass plates, thickness about 1mm, is separated by the 5 μm uniform intervals including liquid crystal material therebetween.Cause
The most luminous for liquid crystal material itself, so be designed with the fluorescent tube as light source on display screen both sides, and carry on the back in LCDs
There are one piece of backlight (or claiming even tabula rasa) and reflective membrane in face, and backlight can be launched light by what fluorescent material formed, and it is made
With mainly providing uniform background light source.
Lcd technology there is also weakness and technical bottleneck, with CRT monitor phase specific luminance, picture homogeneous degree, visual
Angle and all there is obvious gap on the response time.Wherein response time and visible angle each depend on the matter of liquid crystal panel
Amount, picture homogeneous degree and auxiliary optical module have much relations.
For liquid crystal display, brightness is often relevant with his backboard light source.Backboard light source is the brightest, whole liquid crystal
Show that the brightness of device also can improve therewith.
The liquid crystal cells operating lag of signal reaction time i.e. liquid crystal display.The liquid crystal cells actually referred to
Being transformed into the time required for another molecules align state from a kind of molecules align state, response time is the least better, it
The speed that input signal is reacted by each pixel of liquid crystal display, i.e. screen are reacted bright by blackout or by bright turn of dark speed.
Response time is the least, and user does not haves the sensation that tail shadow pulls when seeing motion picture.
(Thin Film Transistor Liquid Crystal Display, tft liquid crystal shows TFT-LCD
Show device) it is one of principal item of showing of current flat panel, have become as display platform important in modern IT, video product.
The main driving principle of TFT-LCD, as shown in Figure 1: trichroism for R/G/B compressed signal, control signal and power are passed through by system board
Wire rod is connected with the adapter connector on printed panel (print circuit board, pcb board), and data are through PCB
After time schedule controller TCON (Timing Controller) IC on plate processes, through pcb board, by source electrode membrane of flip chip S-
COF (Source-Chip on Film) and grid membrane of flip chip G-COF (Gate-Chip on Film) is connected with viewing area,
So that LCD obtain needed for power supply, signal.
Display device can periodically update shown picture.
In general display device, driving means, such as:
The integrated chip of display driver, receives treat from the Graphics Processing Unit or display interlock circuit controlling display device
The view data of the picture of display.Further, according to the view data received, control is driven by the time schedule controller in driving means
Source electrode driver in dynamic device and gate driver, apply suitable voltage to the pixel in the display floater of display device,
Thus show image.On a display panel, an image is replaced with another image, or is updated to the speed of another image
Rate is referred to as refresh rate.
In order to improve display image quality, the most all can use the technology improving refresh rate, traditional panel refresh rate is 60Hz
(i.e. 60fps), refers to that screen is per second to be refreshed 60 times, and refreshing each time is all to carry out each display pixel of viewing area
Charging and discharging action.In prior art, refresh rate is increased to from " 60Hz " " 120Hz (120fps) ", even " 240Hz
(240fps)”.The benefit of high refresh rate is to allow the video content of quickly movement, such as plays video, game, picture rolling
Deng, the most smooth when display.The most just can reduce dynamic fuzzy, and promote the visual experience of user.But, high
Refresh rate also can produce higher energy consumption.In this part power consumption, major part is all display when showing tableaux, brushes
New element is caused.
The principle of above-mentioned increase power consumption is:
When picture is in the state of fast moving image, high-frequency fast refresh action is necessary, and this can make
The picture data of each frame updates to be accelerated, and then makes the image quality demonstrated more smooth;
But during for display tableaux, panel still can ceaselessly carry out refresh activity, due to each frame of tableaux
The data of picture are identical, display refresh time, it is thus achieved that new data be also entirely identical.
Therefore, above-mentioned refreshing is just entirely without meaning, it will cause the most unnecessary power consumption penalty.
Summary of the invention
For above-mentioned the problems of the prior art, present applicant proposes a kind of drive device for display that can reduce power consumption
And driving method.
A kind of drive device for display that can reduce power consumption, including:
Judge module, for judge display currently displaying whether be dynamic menu;
Output control module, for described judge module judge display currently displaying be dynamic menu time, utilization
Time schedule controller controls fan-out area and sends output enable signal to source electrode membrane of flip chip so that display floater obtains new data
Signal.
In aforementioned display device driving means, described judge module includes with lower unit:
Collecting unit: for gathering two width continuous print frame picture datas;
Contrast unit: the most identical for detection two width continuous print frame picture datas,
If identical, then judge the currently displaying tableaux of display,
If it is different, then judge the currently displaying dynamic menu of display.
In aforementioned display device driving means, in described collecting unit, when two width continuous print frame picture datas are respectively as follows: described
The former frame picture data of sequence controller storage inside and present frame picture data.
In aforementioned display device driving means, described output control module includes the N-MOS pipe being positioned at fan-out area,
The level controling signal outfan of described time schedule controller connects the grid of described N-MOS pipe, described sequencing contro
The signal output part that enables of device connects the drain electrode of described N-MOS pipe, and the source electrode of described N-MOS pipe connects making of source electrode membrane of flip chip
Can signal input part.
A kind of display drive method that can reduce power consumption, comprises the following steps:
Judge display currently displaying whether be dynamic menu;
During display dynamic menu, utilize time schedule controller to control fan-out area and send output enable letter to source electrode membrane of flip chip
Number so that display floater obtains new data signal.
In aforementioned display device driving method, during display tableaux, the data signal of display floater is made not update.
Aforementioned display device driving method, it is characterised in that described judge display currently displaying whether be dynamic menu
Including:
Gather two width continuous print frame picture datas,
Detect two width continuous print frame picture datas the most identical,
If it is different, then judge the currently displaying dynamic menu of display;
If identical, then judge that display is currently shown in tableaux.
In aforementioned display device driving method, two width continuous print frame picture datas are respectively as follows: time schedule controller storage inside
Former frame picture data and present frame picture data.
In aforementioned display device driving method, described utilize time schedule controller control fan-out area to source electrode membrane of flip chip send
Output enables signal and includes:
Time schedule controller makes N-MOS pipe turn on to the N-MOS pipe output high level being embedded in fan-out area, time schedule controller
Send output by fan-out area to source electrode membrane of flip chip and enable signal so that display floater obtains new data signal.
In aforementioned display device driving method, during described display tableaux, the data signal of display floater is made not update bag
Include:
Time schedule controller makes N-MOS pipe turn off to the N-MOS pipe output low level being embedded in fan-out area, time schedule controller
Output can not be sent by fan-out area to source electrode membrane of flip chip and enable signal so that display floater can not obtain new data
Signal.
Above-mentioned technical characteristic can combine in any suitable manner or be substituted, as long as can reach by the technical characteristic of equivalence
To the purpose of the present invention.
A kind of drive device for display that can reduce power consumption of the present invention and driving method, at traditional F an Out
On the basis of Area (fan-out area), utilize MOS to separate OE output and enable the connection of signal and S-COF, controlled by TCON
System, only carries out refresh activity, and does not carry out refresh activity when showing tableaux, do not result in power consumption when dynamic menu
Loss.Finally realize the effect that selectivity refreshes, reduce power consumption.And will not increase extra equipment cost, improving product is competing
Strive power.The present invention can apply in the driving of TFT-LCD designs.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:
Fig. 1 shows the driving framework of the TFT-LCD described in background technology,
Wherein, 1-1 represents that PCB, 1-11 represent that a S-COF, 1-12 represent that No. two S-COF, 1-13 represent No. three
S-COF, 1-14 represent that No. four S-COF, 1-2 represent that fan-out area, 1-3 represent that viewing area, 1-21 represent a G-COF,
1-22 represents that No. two G-COF, 1-23 represent No. three G-COF;
Fig. 2 shows the local circuit structure of display device in prior art;
Fig. 3 shows a kind of drive device for display principle that can reduce power consumption described in detailed description of the invention one;
Fig. 4 shows a kind of drive device for display structure that can reduce power consumption described in detailed description of the invention one;
Fig. 5 shows the structure of the judge module described in detailed description of the invention two;
Fig. 6 shows the flow process of a kind of display drive method that can reduce power consumption described in detailed description of the invention three;
Fig. 7 show judge display currently displaying be whether the concrete grammar flow process of dynamic menu;
Fig. 8 shows the flow process of a kind of sequential control method.
In the accompanying drawings, identical parts use identical reference.Accompanying drawing is not according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
In conjunction with the Figure of description in embodiment of the present invention, the technical scheme in embodiment of the present invention is carried out clearly
Remove, be fully described by.Described embodiment is the present invention scheme when reality is applied rather than whole embodiment party
Case.Other embodiments that those skilled in the art are obtained on the premise of not making creative work, all should be suitable to
The scope that the present invention is protected.
Liquid crystal display (Liquid Crystal Display, LCD), owing to power consumption is the lowest, and has high image quality, body
Long-pending feature little, lightweight, the most extremely everybody favors, and becomes the main flow of present displays.Liquid crystal display is with thin film at present
Transistor (Thin Film Transistor, TFT) liquid crystal display is main, and its display floater generally includes the coloured silk being oppositely arranged
Film substrate, tft array substrate and the liquid crystal layer being arranged between two substrates.
The driving of display floater is to be provided scanning letter to liquid crystal display respectively by gate drivers and source electrode driver
Number and data signal, the pressure reduction between different voltage data signals and public electrode voltages causes the liquid crystal anglec of rotation not
With thus form the display of the difference of brightness, i.e. liquid crystal panel and form different GTG.In display floater, voltage data signal
And the relation curve between GTG is gamma (Gamma) curve, as a example by 8bit display floater, it can show 28=256
GTG, corresponding 256 different gamma reference voltages, gamma reference voltage is exactly that change procedure from white to black is divided into
N times idempotent part of 2.
Seeing Fig. 2, the local circuit structural representation of display device in prior art, including voltage changer 11 (DC/DC
Converter), time schedule controller 12 (Timing Controller, TCON), gamma voltage generator 13, source electrode driver
14, gate drivers 15 and display floater 16;
Voltage changer 11 is respectively time schedule controller 12, gamma voltage generator 13, source electrode driver 14 and display surface
Plate 16 is powered (supply voltage is different, does not repeats them here), and video data is supplied to described through described time schedule controller 12
Source electrode driver 14, gamma voltage generator 13 provides one group of gamma reference voltage value (i.e. gamma curve) for source electrode driver,
Described source electrode driver 14 is that described display floater 16 carries according to power supply and this group gamma reference voltage value of voltage changer 11
For the driving voltage for showing described video data, described gate drivers 15 is for providing grid for described display floater 16
Scanning voltage.The supply voltage that described voltage changer 11 provides for described source electrode driver 14 is usually a steady state value, this perseverance
Fixed supply voltage is more than driving voltage maximum in the driving voltage corresponding to overall grey decision-making of described display floater 16, institute
State source electrode driver 14 this supply voltage is carried out dividing potential drop to produce multiple driving voltages by internal.Thus, when described display surface
When the driving voltage corresponding to overall grey-scale range during plate 16 display video material is less, power for described source electrode driver 14
Still keeping higher constant voltage so that display device has higher power consumption, similar, described voltage changer 11 is described
The supply voltage that gamma voltage generator 13 provides also is such.
The display panels of prior art generally comprises time schedule controller (TCON), source electrode driver (Source
Driver), gate drivers (Gate Driver), wherein, the main function of time schedule controller (TCON) is to each two field picture
Data process, and generate data signal corresponding to each frame image data and control signal, wherein, comprise defeated in control signal
Go out to enable signal, export grid (Gate) signal for control gate driver, when output enables grid when signal is high level
(Gate) signal is low-voltage, and it is high voltage that output enables grid (Gate) signal when signal is low level, when data signal is passed
Delivering to source electrode driver, received data signal is converted into data voltage by source electrode driver, to write display panels
Upper corresponding pixel, specifically, when the controlling grid scan line in display panels receives gate drivers (Gate
Driver), after grid (Gate) signal exported, source electrode driver is according to corresponding data voltage, by right in display panels
Discharge and recharge should be carried out in the pixel of this controlling grid scan line, thus show picture.
In the prior art, when showing picture image content, display floater needs each frame picture is carried out above-mentioned place
Multiple identical frame image contents, particularly when display floater is in tableaux, are still to carry out the most identical place by reason
Reason process, thus cause the problem that display floater power consumption is higher.
The present invention is that refresh activity can cause a large amount of power consumption penalty in order to solve existing display when display static face
Problem, now provides a kind of drive device for display that can reduce power consumption and driving method.
According to above-mentioned technical foundation, the application, in order to reduce the refresh power consumption of tableaux, have employed following being embodied as
Mode is described in detail.Being described in detail with four specific embodiments separately below, concrete scheme is the most following
Four detailed description of the invention:
Detailed description of the invention one: illustrate present embodiment with reference to Fig. 3 and Fig. 4, the one energy described in present embodiment
Enough reduce the drive device for display of power consumption,
Owing to being in the state of rapid movement when picture, when i.e. showing dynamic menu, display floater can be constantly updated frame and draw
Face data, but during for display tableaux, this update action still can constantly be carried out, but tableaux need not update number
According to, therefore data update action during tableaux will result in substantial amounts of power consumption.
For these reasons, a kind of drive device for display that can reduce power consumption described in present embodiment, with reference to Fig. 4
Illustrate, as it can be seen, a kind of drive device for display that can reduce power consumption includes: judge module and output control mould
Block, it is judged that module for judge display currently displaying whether be dynamic menu, output control module just can be according to reception
The result arrived obtains control instruction.That is:
First with judge module judge display currently displaying whether be dynamic menu, because only that currently displaying dynamic
During state picture, just need to utilize output control module to start following action:
Time schedule controller controls fan-out area and sends output enable signal to source electrode membrane of flip chip so that display floater obtains
New data signal.
Present embodiment is in said structure, and output module controls when dynamic menu so that display floater obtains new
Data signal.That is: output module controls to only have when showing dynamic menu, and the picture data of TCON output just can change, then show
Show that panel just needs to receive new picture signal and can obtain new picture, and ensure the fluency of current picture, the most just
The picture data update action caused when avoiding display tableaux, eliminates tableaux and refreshes.
Further, output control module can also be used to when showing tableaux so that the data letter of display floater
Number do not update.That is: output control module is when showing tableaux, and the picture data of TCON output is constant, then display floater is not
Receive new signal, also avoid the picture data update action caused when showing tableaux, eliminate tableaux
Refresh.
Detailed description of the invention two: illustrate that present embodiment, present embodiment are to described in detailed description of the invention one with reference to Fig. 5
A kind of drive device for display that can reduce power consumption be further described, in present embodiment,
Further, illustrate with reference to Fig. 5, as it can be seen, in judge module, specifically include with lower unit: gather single
Unit and contrast unit, the data collected, for gathering two width continuous print frame picture datas, are then sent to right by collecting unit
Ratio is in unit, and contrast unit has the effect of storage former frame picture data concurrently simultaneously, also will be by former frame picture data with current
Picture data compares.
Concrete:
Collecting unit is utilized constantly to gather each frame picture data to be played, it may be assumed that TCON storage inside each
Frame picture data.
Utilize contrast unit to detect former frame picture data and current picture data (that is: two frame continuous print picture datas) are
No identical, if two frame continuous print picture datas are identical, then it represents that data are not updated, next frame picture and former frame picture institute
Display image identical, then also mean that display currently displaying be tableaux, if two frame continuous print picture datas are not
With, then it represents that data are updated, and next frame picture is different from the image shown by former frame picture, then also mean that aobvious
Show the currently displaying dynamic menu of device.
And for output control module, concrete circuit structure is:
Be embedded with a N-MOS pipe in the fan-out area of display, the level controling signal outfan of time schedule controller connects
The grid of N-MOS pipe, the signal output part that enables of time schedule controller connects the drain electrode of N-MOS pipe, and the source electrode of N-MOS pipe connects source
The enable signal input part of very thin films flip.
The operation principle of said structure is as follows: illustrate with reference to Fig. 3, as it can be seen, wherein M1 is N-MOS pipe, C is M1
Level controling signal, OE (Output Enable, output enable) is the enable signal of TCON output, and OE_I is that S-COF can
The input of the corresponding OE received enables signal.
N-MOS manages: N-MOS English full name is: N-Mental-Oxide-Semiconductor, looks like for N-type metal-oxygen
Compound-quasiconductor, and the transistor having this structure is referred to as N-MOS transistor.N-MOS transistor is a kind of logic circuit
In conventional transistor, it has three and connects ends, respectively grid (G), drain electrode (D) and source electrode (S),
Its operationally, the condition of conducting is as follows: uG-uS grid and source electrode are high, and uGS grid and voltage between source electrodes are out
Open voltage, i.e. NMOS enhancement mode pipe: uG-uS > 0, and | uG-uS | > | uGS (th) |, uGS | th | is on voltage.
So it is applied in reality, is then:
Grid is high level, then the conducting of N-MOS pipe, and electric current is flowed to source electrode by drain electrode.The tool being applied in present embodiment
Body principle is as follows:
When logic level C is H (high), i.e. high level 3.3V, it is positioned at the N-MOS pipe conducting of fan-out area, PCB end is sent out
The output gone out is enabled signal and can be transmitted by N-MOS pipe, makes S-COF detect the trailing edge of OE signal, and S-COF receives
OE_I=OE, now S-COF outputting data signals again is to viewing area, viewing area obtain new data signal carry out data brush
Newly.
When logic level C is L (low), i.e. low level 0V, the N-MOS pipe being positioned at fan-out area turns off, and PCB end sends
Output enable signal and can not be transmitted by N-MOS pipe, now S-COF detects less than the trailing edge of OE signal, S-COF
Not receiving new data, also would not export new data signal to output display area, viewing area is not refreshed, and then will not be made
Become the loss of power consumption.Finally realize the effect that selectivity refreshes, reduce power consumption.
The mutual relation of the signal between the signal that this device relates to is as shown in table 1:
Table 1
Level controling signal | H | L |
Logic level | 3.3V | 0V |
OE | Output | Output |
N-MOS | Conducting | Turn off |
OE_I | OE_I=OE | OE_I does not receives signal |
Viewing area | Refresh | Do not refresh |
In above-mentioned embodiment, N-MOS pipe is embedded in the fan-out area of display, be due to:
Fanout area is the coupling part of viewing area signal line and driver, and its function is by the digital signal of driver
Gate is utilized to drive numeral letter N-MOS pipe number input to viewing area, it is possible to weigh the numeral that single gate can drive
The maximum of signal input.And N-MOS pipe effect is just being determined whether to cover the output signal of time schedule controller to source electrode thin film
Crystalline substance is transmitted.Therefore, in above-mentioned embodiment, N-MOS pipe is embedded in the fan-out area of display, and then control signal is
No transmission.
A kind of drive device for display that can reduce power consumption described in present embodiment, in refresh process, refreshes dynamic
Work can be judged by picture data type automatically, it is not necessary to user carries out Non-follow control, will be suitable for current aobvious
Show that the refresh activity of the picture sight shown by device is selected.In comparison, prior art can not allow the refreshing of display floater
Action is controlled, and is varied or adjusted.
Therefore, a kind of drive device for display that can reduce power consumption described in this present embodiment, it is possible to meet existing
The demand of technology, is improving user's visual experience, and the high refresh rate reducing dynamic fuzzy sets down by force so that the brush of tableaux
New element is inhibited, and allows energy consumption minimization when updating display floater, promotes electricity usage efficiency, reduces energy consumption.
Additionally, due to the thin film transistor (TFT) (TFT) in display floater yet suffers from certain electric leakage in the state of being off
Stream so that in display floater, the storage picture retention time achieved by electric capacity is limited, so that above-mentioned embodiment is aobvious
Showing that panel causes showing the decline of image quality along with the prolongation of tableaux time, for solving the problems referred to above, the present invention is real
A kind of time sequence control device that the mode of executing provides, including:
Module one: be used for detecting current frame image data the most identical with previous frame image data;
Module one link block two and module five simultaneously,
If current frame image data are identical with previous frame image data, then module two is driven to work,
If current frame image data are different from previous frame image data, then module five is driven to work;
Module two: for count value M is added 1;
Owing to the time interval between the most adjacent two two field pictures is fixed value, can be reflected by count value M
From recently time to source electrode driver input data signal up to the time length of current time;
Module two link block three;
Module three: be used for judging presently described count value M whether less than preset value N, N >=2,
Module San Tong method link block four and module five,
If presently described count value M is less than preset value N, hold driving module four work,
If presently described count value M is more than or equal to preset value N, hold driving module five work;
Wherein, preset value N can be 3,5 and 6 etc.;
Module four: for stopping the source electrode driver input data signal to display floater, and control described display floater
In thin film transistor (TFT) be off state;
Module four link block five;
Module five: then according to described current frame image data to described source electrode driver input data signal, to described aobvious
Show the gate drivers input control signal of panel;
Module five link block six;
Module six: described count value M is reset.
The time sequence control device that embodiment of the present invention provides, when current frame image data and previous frame image number being detected
According to when being identical, it is judged that display floater is in tableaux state, and stops inputting data to the source electrode driver of display floater
Signal, controls the thin film transistor (TFT) in display floater and is off state, thus need not source electrode driver input data
The current frame image data making display floater in the case of signal are identical with previous frame view data holding, and then reduce display
The power consumption of panel.
Additionally, when the constant situation of display floater continuous multiple frames image being detected, input number to source electrode driver in time
The number of it is believed that, to gate drivers input control signal thus is updated the picture of display floater, thus ensure that display surface
The image quality of plate.
Additionally, embodiment of the present invention additionally provides a kind of display device including above-mentioned time sequence control device.Wherein, should
Display device can be note-book computer display screen, Electronic Paper, organic light emitting diode display, liquid crystal display, liquid crystal electricity
Depending on, any product with display function or the parts such as DPF, mobile phone, panel computer.
In the prior art, there is the electric supply installation of a kind of display floater source electrode driver, including:
Time schedule controller, for whole grey decision-making of the current line view data of analysis video data, obtains a selected ash
Rank are worth;And determine an analog power voltage according to described selected grey decision-making;
Being coupled to the power supervisor that described sequencing contro is suitable, described power supervisor is for described analog power voltage
Power for described source electrode driver.
Preferably, described time schedule controller, the grey-scale range filtering out N group default includes the one of described selected grey decision-making
Group grey-scale range, according to the one group of grey-scale range including described selected grey decision-making filtered out, tables look-up and determines described analog power
Voltage.
Preferably, described time schedule controller, it is additionally operable to preserve in advance by the whole grey-scale range division of described display floater
The N group grey-scale range obtained, N is the integer more than or equal to 3 and less than or equal to 10.
Preferably, the grey decision-making that described display floater shows is in the range of 0~63.
Preferably, the grey decision-making that described display floater shows is in the range of 0~254.
Having the beneficial effect that of the electric supply installation of above-mentioned a kind of display floater source electrode driver:
The voltage powered for described source electrode driver is with the change of the grey decision-making of the described current line view data of video data
Change and adjust, it is not necessary to be always held at higher constant power voltage, reduce the power consumption of display device.
The electric supply installation of above-mentioned a kind of display floater source electrode driver provides a kind of display device simultaneously, including voltage transformation
Device, gamma voltage generator and be coupled to the source electrode driver of described gamma voltage generator;
Also include the electric supply installation of display floater source electrode driver described in example performed as described above.
Described gamma voltage generator is coupled to described time schedule controller, and described voltage changer is described display device
Time schedule controller and power supervisor;
It is described gamma voltage that described power supervisor is additionally operable to the analog power voltage that described time schedule controller determines
Generator is powered.
Above-described embodiment has the beneficial effect that:
The voltage powered for described source electrode driver is with the change of the grey decision-making of the described current line view data of video data
Change and adjust, it is not necessary to be always held at higher constant power voltage, reduce the power consumption of display device.
Detailed description of the invention three: illustrate present embodiment with reference to Fig. 6 and Fig. 7, the one energy described in present embodiment
Enough reduce the display drive method of power consumption,
Owing to being in the state of rapid movement when picture, when i.e. showing dynamic menu, display floater can be constantly updated frame and draw
Face data, but during for display tableaux, this update action still can constantly be carried out, but tableaux need not update number
According to, therefore data update action during tableaux will result in substantial amounts of power consumption.
For these reasons, a kind of display drive method that can reduce power consumption described in present embodiment, with reference to Fig. 6
Illustrate:
When system is properly functioning, TCON can store the frame picture data shown, in present embodiment, make use of just
The picture data stored in TCON is to judge that currently displaying picture is whether as tableaux.Its concrete determination methods
As follows:
S101 judge display currently displaying whether be dynamic menu: by two frame continuous print pictures of TCON storage inside
Data (former frame picture data and present frame picture data) contrast, if two frame data are identical, then prove that display is current
The picture of display is tableaux;If two groups of data are different, then the picture that proof display is currently displaying is dynamic menu.
Detection former frame picture data is the most identical, such as Fig. 7 with current picture data (that is: two frame continuous print picture datas)
Shown in:
S201 gathers two width continuous print frame picture datas;
It is the most identical that S202 detects two width continuous print frame picture datas;
If S203 is identical, display is currently shown in tableaux;
S204 is if it is different, the currently displaying dynamic menu of display.
If two frame continuous print picture datas are identical, then it represents that data are not updated, next frame picture and former frame picture
Shown image is identical, then also mean that display currently displaying be tableaux, if two frame continuous print picture datas
Different, then it represents that data are updated, and next frame picture is different from the image shown by former frame picture, then also mean that
The currently displaying dynamic menu of display.
After having known the state of currently displaying picture, present embodiment refreshes further according to the state of display picture
Or static action, this makes it possible to avoid thoroughly refresh power consumption during tableaux.Its concrete display driving side
Method is as follows:
S102 utilizes time schedule controller to control fan-out area and sends output enable signal to source electrode membrane of flip chip so that display
Panel obtains new data signal;
The data signal of S103 display floater does not updates.
In this method only when dynamic menu, utilize time schedule controller to control fan-out area and send defeated to source electrode membrane of flip chip
Go out to enable signal so that display floater obtains new data signal, it may be assumed that carry out refresh activity, it is ensured that present displays shows
Picture is smooth.
Present embodiment is in above-mentioned steps, when dynamic menu so that display floater obtains new data signal.That is:
Only having when showing dynamic menu, the picture data of TCON output just can change, then display floater just needs to receive new picture
Signal can obtain new picture, and ensures the fluency of current picture, avoids to be made when showing tableaux simultaneously
The picture data update action become, eliminates tableaux and refreshes.
And when being display tableaux for judged result, we's rule is for the number of the display floater of display tableaux
The number of it is believed that does not updates, it may be assumed that do not refresh, and this makes it possible to avoid completely the power consumption of refresh activity during tableaux, finally
Realize the effect that selectivity refreshes, reduce power consumption.
Detailed description of the invention four: present embodiment is a kind of described in detailed description of the invention three can reduce power consumption aobvious
Show that device driving method is further described, in present embodiment,
Further, in aforementioned display device driving method, the concrete operation method when reality is applied is as follows, further
Disclose its key points for operation:
First, N-MOS pipe is embedded in fan-out area;
Above-mentioned action is only to increase a mos pipe, low cost on original circuit, and annexation is simple, the work of mos pipe
For power consumption is compared to carrying out, under tableaux, the power that refresh activity is consumed, it is nowhere near, therefore, the mos of increase
Pipe will not cause new burden to primary circuit.
Detailed description of the invention five: present embodiment is a kind of described in detailed description of the invention five can reduce power consumption aobvious
Show that device driving method is further described, in present embodiment,
Further, when actual control method operation, if the picture that present displays shows is dynamic menu, then time
Sequence controller to N-MOS pipe export 3.3V high level so that N-MOS pipe turn on, now, time schedule controller by fan-out area to
Source electrode membrane of flip chip sends output and enables signal, and display floater obtains new data signal, and viewing area carries out Refresh Data.
If the picture that present displays shows is tableaux, then time schedule controller exports 0V low level to N-MOS pipe, makes
N-MOS pipe turns off, and now, time schedule controller can not send output by fan-out area to source electrode membrane of flip chip and enable signal,
Display floater can not obtain new data signal, and viewing area is not refreshed, and does not results in the loss of power consumption.Finally realize selectivity
The effect refreshed, reduces power consumption.
N-MOS manages: N-MOS English full name is: N-Mental-Oxide-Semiconductor, looks like for N-type metal-oxygen
Compound-quasiconductor, and the transistor having this structure is referred to as N-MOS transistor.N-MOS transistor is a kind of logic circuit
In conventional transistor, it has three and connects ends, respectively grid (G), drain electrode (D) and source electrode (S),
Its operationally, the condition of conducting is as follows: uG-uS grid and source electrode are high, and uGS grid and voltage between source electrodes are out
Open voltage, i.e. NMOS enhancement mode pipe: uG-uS > 0, and | uG-uS | > | uGS (th) |, uGS | th | is on voltage.
So it is applied in reality, is then:
Grid is high level, then the conducting of N-MOS pipe, and electric current is flowed to source electrode by drain electrode.The tool being applied in present embodiment
Body principle is as follows:
When logic level C is H (high), i.e. high level 3.3V, it is positioned at the N-MOS pipe conducting of fan-out area, PCB end is sent out
The output gone out is enabled signal and can be transmitted by N-MOS pipe, makes S-COF detect the trailing edge of OE signal, and S-COF receives
OE_I=OE, now S-COF outputting data signals again is to viewing area, viewing area obtain new data signal carry out data brush
Newly.
When logic level C is L (low), i.e. low level 0V, the N-MOS pipe being positioned at fan-out area turns off, and PCB end sends
Output enable signal and can not be transmitted by N-MOS pipe, now S-COF detects less than the trailing edge of OE signal, S-COF
Not receiving new data, also would not export new data signal to output display area, viewing area is not refreshed, and then will not be made
Become the loss of power consumption.
Mutual relation between the signal that this method relates to is as shown in table 2:
Table 2
A kind of display drive method that can reduce power consumption described in present embodiment, in refresh process, refreshes dynamic
Work can be judged by picture data type automatically, it is not necessary to user carries out Non-follow control, will be suitable for current aobvious
Show that the refresh activity of the picture sight shown by device is selected.In comparison, prior art can not allow the refreshing of display floater
Action is controlled, and is varied or adjusted.
Therefore, a kind of display drive method that can reduce power consumption described in this present embodiment, it is possible to meet existing
The demand of technology, is improving user's visual experience, and the high refresh rate reducing dynamic fuzzy sets down by force so that the brush of tableaux
New element is inhibited, and allows energy consumption minimization when updating display floater, promotes electricity usage efficiency, reduces energy consumption.
Additionally, due to the thin film transistor (TFT) (TFT) in display floater yet suffers from certain electric leakage in the state of being off
Stream so that in display floater, the storage picture retention time achieved by electric capacity is limited, so that above-mentioned embodiment is aobvious
Show that panel causes showing the decline of image quality along with the prolongation of tableaux time, for solving the problems referred to above, now provide one
Plant sequential control method, illustrate with reference to Fig. 8, be illustrated as a kind of sequential control method that embodiment of the present invention provides
Flow chart, including:
S21: detection current frame image data are the most identical with previous frame image data,
If so, step S22 is performed,
If it is not, perform step S25;
S22: count value M is added 1;Owing to the time interval between the most adjacent two two field pictures is fixed value, pass through
Count value M can reflect from recently time to source electrode driver input data signal up to the time length of current time.
S23: judge presently described count value M whether less than preset value N, N >=2,
If presently described count value M is less than preset value N, perform step S24,
If presently described count value M is more than or equal to preset value N, perform step S25;
Wherein, preset value N can be 3,5 and 6 etc.;
S24: stop the source electrode driver input data signal to display floater, and control the thin film in described display floater
Transistor is off state;
S25: then according to described current frame image data to described source electrode driver input data signal, to described display surface
The gate drivers input control signal of plate, performs step S26;
S26: described count value M is reset.
The sequential control method that embodiment of the present invention provides, when current frame image data and previous frame image number being detected
According to when being identical, it is judged that display floater is in tableaux state, and stops inputting data to the source electrode driver of display floater
Signal, controls the thin film transistor (TFT) in display floater and is off state, thus need not source electrode driver input data
The current frame image data making display floater in the case of signal are identical with previous frame view data holding, and then reduce display
The power consumption of panel.
Additionally, when the constant situation of display floater continuous multiple frames image being detected, input number to source electrode driver in time
The number of it is believed that, to gate drivers input control signal thus is updated the picture of display floater, thus ensure that display surface
The image quality of plate.In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, be integrally connected, it is also possible to be detachably to connect
Connect;It can be the connection of two element internals;Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, for this
For the those of ordinary skill in field, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.
Although herein with reference to specific embodiment, the present invention is described it should be understood that, these are real
Execute the example that example is only principles and applications.It should therefore be understood that exemplary embodiment can be carried out
Many amendments, and can be designed that other layout, without departing from the spirit of the present invention that claims are limited
And scope.
It should be understood that and can combine different appurtenances by being different from original claim manner described
Profit requires and feature specifically described herein.Will also be appreciated that combining the feature described by independent embodiment can use
In other described embodiments.
Claims (10)
1. the drive device for display that can reduce power consumption, it is characterised in that including:
Judge module, for judge display currently displaying whether be dynamic menu;
Output control module, for described judge module judge display currently displaying be dynamic menu time, utilize sequential
Controller controls fan-out area and sends output enable signal to source electrode membrane of flip chip so that display floater obtains new data letter
Number.
Drive device for display the most according to claim 1, it is characterised in that described judge module includes with lower unit:
Collecting unit: for gathering two width continuous print frame picture datas;
Contrast unit: the most identical for detection two width continuous print frame picture datas,
If identical, then judge the currently displaying tableaux of display,
If it is different, then judge the currently displaying dynamic menu of display.
Drive device for display the most according to claim 2, it is characterised in that in described collecting unit, two width continuous print
Frame picture data is respectively as follows: former frame picture data and the present frame picture data of described time schedule controller storage inside.
Drive device for display the most according to claim 1, it is characterised in that described output control module includes being positioned at fan
Go out the N-MOS pipe in region,
The level controling signal outfan of described time schedule controller connects the grid of described N-MOS pipe, described time schedule controller
Enabling signal output part and connect the drain electrode of described N-MOS pipe, the source electrode of described N-MOS pipe connects the enable letter of source electrode membrane of flip chip
Number input.
5. the display drive method that can reduce power consumption, it is characterised in that comprise the following steps:
Judge display currently displaying whether be dynamic menu;
During display dynamic menu, utilize time schedule controller to control fan-out area and send output enable signal to source electrode membrane of flip chip,
Display floater is made to obtain new data signal.
Display drive method the most according to claim 5, it is characterised in that during display tableaux, make display floater
Data signal do not update.
Display drive method the most according to claim 5, it is characterised in that what described judgement display was currently displaying is
No include for dynamic menu:
Gather two width continuous print frame picture datas,
Detect two width continuous print frame picture datas the most identical,
If it is different, then judge the currently displaying dynamic menu of display;
If identical, then judge that display is currently shown in tableaux.
Display drive method the most according to claim 7, it is characterised in that two width continuous print frame picture datas are respectively
For: the former frame picture data of time schedule controller storage inside and present frame picture data.
Display drive method the most according to claim 5, it is characterised in that described utilize time schedule controller control fan-out
Region sends output enable signal to source electrode membrane of flip chip and includes:
Time schedule controller makes N-MOS pipe turn on to the N-MOS pipe output high level being embedded in fan-out area, and time schedule controller leads to
Cross fan-out area and send output enable signal to source electrode membrane of flip chip so that display floater obtains new data signal.
Display drive method the most according to claim 6, it is characterised in that during described display tableaux, make display
The data signal of panel does not update and includes:
Time schedule controller makes N-MOS pipe turn off to the N-MOS pipe output low level being embedded in fan-out area, and time schedule controller can not
Send output by fan-out area to source electrode membrane of flip chip and enable signal so that display floater can not obtain new data signal.
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