CN106157917B - A kind of drive device for display and its driving method can reduce power consumption - Google Patents
A kind of drive device for display and its driving method can reduce power consumption Download PDFInfo
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- CN106157917B CN106157917B CN201610799688.3A CN201610799688A CN106157917B CN 106157917 B CN106157917 B CN 106157917B CN 201610799688 A CN201610799688 A CN 201610799688A CN 106157917 B CN106157917 B CN 106157917B
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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
-
- 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 present invention provides a kind of drive device for display and its driving method that can reduce power consumption, is related to display actuation techniques field.In order to solve existing display when showing static face, refresh activity will cause the problem of a large amount of power consumption penalties, the present invention proposes a kind of drive device for display and driving method that can reduce power consumption, on the basis of traditional (fan-out area) Fan Out Area, the connection that OE output enable signal and S-COF is separated using MOS, is controlled by TCON, refresh activity is only carried out in dynamic menu, and when showing tableaux without refresh activity, it not will cause the loss of power consumption.It finally realizes the effect selectively refreshed, reduces power consumption.And it not will increase additional equipment cost, promote product competitiveness.The present invention can apply in the driving design of TFT-LCD.
Description
Technical field
The invention belongs to display actuation techniques field more particularly to a kind of drive device for display that can reduce power consumption
And driving method.
Background technique
LCD (abbreviation of Liquid Crystal Display) liquid crystal display.
The construction of LCD is that liquid crystal cell is placed in the parallel glass substrate of two panels, and it is (thin that TFT is arranged on lower baseplate glass
Film transistor), colored filter is set on upper substrate glass, is changed by signal on TFT and voltage to control liquid crystal molecule
Rotation direction, thus reach control each pixel polarised light outgoing whether and reach display purpose.
From the point of view of the structure of liquid crystal display, either laptop or desktop system, the LCD display of use is all
The layered structure being made of different piece.
LCD is made of two pieces of glass plates, thickness about 1mm, therebetween by including that 5 μm of uniform intervals of liquid crystal material separate.Cause
It does not shine for liquid crystal material itself, so being designed with the fluorescent tube as light source on display screen both sides, and is carried on the back in liquid crystal display
There are one piece of backlight (or uniform light board) and reflective membrane in face, and backlight can emit light by what fluorescent material formed, make
With being mainly to provide uniform background light source.
LCD technology is there is also weakness and technical bottleneck, the brightness, picture homogeneous degree, visual compared with CRT monitor
Angle and all there is apparent gap on the reaction time.Wherein reaction time and visible angle each depend on the matter of liquid crystal display panel
Amount, picture homogeneous degree and auxiliary optical module have much relations.
For liquid crystal display, brightness is often related with his backboard light source.Backboard light source is brighter, entire liquid crystal
Show that the brightness of device can also increase accordingly.
The liquid crystal cells operating lag of signal reaction time i.e. liquid crystal display.The liquid crystal cells actually referred to
It is transformed into the time required for another molecules align state from a kind of molecules align state, the response time is smaller better, it
The speed that each pixel of liquid crystal display reacts input signal is reacted, i.e., screen is bright or by bright turn of dark speed by blackout.
Response time is smaller, and user is not in the feeling that tail shadow pulls when seeing motion picture.
(Thin Film Transistor Liquid Crystal Display, tft liquid crystal are aobvious by TFT-LCD
Show device) it is one of the principal item that current flat panel is shown, have become modern IT, display platform important in video product.
The main driving principle of TFT-LCD, system board passes through tri- color compressed signal of R/G/B, control signal and power as shown in Figure 1:
Connector connector on wire rod and printing plate (print circuit board, pcb board) is connected, and data pass through PCB
After sequence controller TCON (Timing Controller) IC processing on plate, through pcb board, pass through source electrode membrane of flip chip S-
COF (Source-Chip on Film) and grid membrane of flip chip G-COF (Gate-Chip on Film) are connect with viewing area,
So that LCD obtains required power supply, signal.
Display device can periodically update shown picture.
In general display device, driving device, such as:
Display driver integrated chip, from control display device graphics processing unit or display interlock circuit receive to
The image data of the picture of display.Also, according to the received image data of institute, the sequence controller in driving device drives control
Source electrode driver and gate driver in dynamic device apply voltage appropriate to the pixel in the display panel of display device,
To 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.
It all can be usually 60Hz using the technology for improving refresh rate, traditional panel refresh rate to improve display image quality
(i.e. 60fps) refers to that screen is per second by refreshing 60 times, and refreshing each time all is carried out to each display pixel of display area
Charging and discharging movement.In the prior art, refresh rate is increased to " 120Hz (120fps) ", even " 240Hz from " 60Hz "
(240fps)".The benefit of high refresh rate is can to allow the video content fast moved, for example plays video, game, picture rolling
Deng more smooth in display.Dynamic fuzzy can be thus reduced, and promotes the visual experience of user.However, high
Refresh rate can also generate higher energy consumption.Most of in the part power consumption is all display when showing tableaux, is brushed
Caused by new element.
The principle of above-mentioned increase power consumption is:
When picture is in the state of fast moving image, the movement of high-frequency fast refresh is necessary, this meeting so that
The picture data of each frame, which updates, to be accelerated, so that the image quality shown is more smooth；
But when for display tableaux, panel still can ceaselessly carry out refresh activity, due to each frame of tableaux
The data of picture be it is identical, display refresh when, the new data of acquisition is also entirely identical.
Therefore, above-mentioned refreshing just absolutely not meaning, it will cause many unnecessary power consumption penalties.
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 can reduce power consumption, comprising:
Judgment module, for judging that it is no for dynamic menu that display is currently shown；
Output control module, for utilizing when the judgment module judges that currently dynamic menu is shown in display
Sequence controller controls fan-out area and sends output enable signal to source electrode membrane of flip chip, so that display panel obtains new data
Signal.
In aforementioned display device driving device, the judgment module includes with lower unit:
Acquisition unit: for acquiring the continuous frame picture data of two width；
Comparison unit: it is whether identical for detecting the continuous frame picture data of two width,
If they are the same, then judge that display currently shows tableaux,
If it is different, then judging that display currently shows dynamic menu.
In aforementioned display device driving device, in the acquisition unit, when the continuous frame picture data of two width is respectively as follows: described
The former frame picture data and present frame picture data of sequence controller storage inside.
In aforementioned display device driving device, the output control module includes that the N-MOS positioned at fan-out area is managed,
The level controling signal output end of the sequence controller connects the grid of the N-MOS pipe, the timing control
The enable signal output end of device connects the drain electrode of the N-MOS pipe, and the source electrode connection source electrode membrane of flip chip of the N-MOS pipe makes
It can signal input part.
A kind of display drive method can reduce power consumption, comprising the following steps:
It is no for dynamic menu to judge that display is currently shown；
When showing dynamic menu, fan-out area is controlled using sequence controller and sends the enabled letter of output to source electrode membrane of flip chip
Number, so that display panel obtains new data-signal.
In aforementioned display device driving method, when showing tableaux, update the data-signal of display panel not.
Aforementioned display device driving method, which is characterized in that described to judge that display is currently shown no for dynamic menu
Include:
The continuous frame picture data of two width is acquired,
Whether identical detect the continuous frame picture data of two width,
If it is different, then judging that display currently shows dynamic menu；
If they are the same, then judge that display is currently shown in tableaux.
In aforementioned display device driving method, the continuous frame picture data of two width is respectively as follows: sequence controller storage inside
Former frame picture data and present frame picture data.
It is described to control fan-out area to the transmission of source electrode membrane of flip chip using sequence controller in aforementioned display device driving method
Exporting enable signal includes:
N-MOS pipe is connected to the N-MOS pipe output high level in fan-out area in sequence controller, sequence controller
Output enable signal is sent to source electrode membrane of flip chip by fan-out area, so that display panel obtains new data-signal.
In aforementioned display device driving method, when the display tableaux, the data-signal of display panel is made not update packet
It includes:
Sequence controller turns off N-MOS pipe to the N-MOS pipe output low level in fan-out area, sequence controller
Output enable signal cannot be sent to source electrode membrane of flip chip by fan-out area, so that display panel can not obtain new data
Signal.
Above-mentioned technical characteristic may be combined in various suitable ways or be substituted by equivalent technical characteristic, as long as can reach
To the purpose of the present invention.
A kind of drive device for display and driving method can reduce power consumption of the present invention, in traditional Fan Out
On the basis of Area (fan-out area), the connection of OE output enable signal and S-COF is separated using MOS, is controlled by TCON
System, only carries out refresh activity in dynamic menu, and not will cause power consumption without refresh activity when showing tableaux
Loss.It finally realizes the effect selectively refreshed, reduces power consumption.And it not will increase additional equipment cost, it is competing to promote product
Strive power.The present invention can apply in the driving design of TFT-LCD.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 shows the driving framework of TFT-LCD described in background technique,
Wherein, 1-1 indicates that PCB, 1-11 indicate that No.1 S-COF, 1-12 indicate that No. two S-COF, 1-13 indicate No. three
S-COF, 1-14 indicate that No. four S-COF, 1-2 indicate fan-out area, and 1-3 indicates viewing area, and 1-21 indicates No.1 G-COF,
1-22 indicates that No. two G-COF, 1-23 indicate No. three G-COF；
Fig. 2 shows the local circuit structure of display device in the prior art；
Fig. 3 shows a kind of drive device for display principle that can reduce power consumption described in specific embodiment one；
Fig. 4 shows a kind of drive device for display structure that can reduce power consumption described in specific embodiment one；
Fig. 5 shows the structure of judgment module described in specific embodiment two；
Fig. 6 shows a kind of process for the display drive method that can reduce power consumption described in specific embodiment three；
Fig. 7 shows that judge that display is currently shown no for the specific method process of dynamic menu；
Fig. 8 shows a kind of process of sequential control method.
In the accompanying drawings, identical component uses identical appended drawing reference.Attached drawing is not according to actual ratio.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
In conjunction with the Figure of description in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
It removes, be fully described by.The embodiment is scheme of present invention when actually with application, rather than whole embodiment party
Case.Those skilled in the art's institute's other embodiments obtained without making creative work, should all be suitable for
The range that the present invention is protected.
Liquid crystal display (Liquid Crystal Display, LCD) since power consumption is very low, and has high image quality, body
Small, the light-weight feature of product, therefore favored by everybody, become the mainstream of present displays.Liquid crystal display is at present with film
Based on transistor (Thin Film Transistor, TFT) liquid crystal display, display panel generally includes the coloured silk being oppositely arranged
Ilm substrate, tft array substrate and the liquid crystal layer being set between two substrates.
The driving of display panel is to provide scanning letter to liquid crystal display respectively from gate drivers and source electrode driver
Number and data-signal, pressure difference between different voltage data signals and public electrode voltages cause liquid crystal rotation angle not
With the difference to form brightness, i.e. the display of liquid crystal display panel forms different grayscale.In display panel, voltage data signal
Relation curve between grayscale is that gamma (Gamma) curve can show 2 by taking 8bit display panel as an example8=256
Grayscale, corresponding 256 different gamma reference voltages, gamma reference voltage is exactly that change procedure from white to black is divided into
2 n times idempotent part.
Referring to fig. 2, the local circuit structural schematic diagram of display device, including 11 (DC/DC of voltage changer in the prior art
Converter), sequence controller 12 (Timing Controller, TCON), gamma voltage generator 13, source electrode driver
14, gate drivers 15 and display panel 16；
Voltage changer 11 is respectively sequence controller 12, gamma voltage generator 13, source electrode driver 14 and display surface
Plate 16 is powered (supply voltage is different, and details are not described herein), and video data is supplied to described through the sequence controller 12
Source electrode driver 14, gamma voltage generator 13 provide one group of gamma reference voltage value (i.e. gamma curve) for source electrode driver,
The source electrode driver 14 is that the display panel 16 mentions according to the power supply and this group of gamma reference voltage value of voltage changer 11
For for showing that the driving voltage of the video data, the gate drivers 15 are used to provide grid for the display panel 16
Scanning voltage.The voltage changer 11 is that the supply voltage that the source electrode driver 14 provides is usually a steady state value, the perseverance
Fixed supply voltage is greater than maximum driving voltage in driving voltage corresponding to the whole grayscale value of the display panel 16, institute
It states source electrode driver 14 and the multiple driving voltages of partial pressure generation is carried out to the supply voltage by internal.As a result, when the display surface
When driving voltage corresponding to whole grey-scale range when 16 display video material of plate is smaller, power for the source electrode driver 14
Higher constant voltage is still kept, so that display device power consumption with higher, similar, the voltage changer 11 is described
The supply voltage that gamma voltage generator 13 provides is also such.
The liquid crystal display panel of the prior art generally comprises sequence controller (TCON), source electrode driver (Source
Driver), gate drivers (Gate Driver), wherein sequence controller (TCON) main function is to each frame image
Data are handled, and the corresponding data-signal of each frame image data and control signal are generated, wherein comprising defeated in control signal
Enable signal out, for controlling gate drivers output grid (Gate) signal, the grid when exporting enable signal and being high level
(Gate) signal is low-voltage, and grid (Gate) signal is high voltage when output enable signal is low level, when data-signal is passed
It is sent to source electrode driver, received data signal is converted into data voltage by source electrode driver, liquid crystal display panel is written
Upper corresponding pixel, specifically, when the controlling grid scan line in liquid crystal display panel receives gate drivers (Gate
Driver) after grid (Gate) signal exported, source electrode driver, will be right in liquid crystal display panel according to corresponding data voltage
Charge and discharge should be carried out in the pixel of the controlling grid scan line, to show picture.
In the prior art, when showing picture image content, display panel needs to carry out above-mentioned place to each frame picture
Reason is still to carry out repeatedly identical place to multiple identical frame image contents especially when display panel is in tableaux
Reason process, to cause the higher problem of display panel power consumption.
The present invention is to solve existing display when showing static face, and refresh activity will cause a large amount of power consumption penalties
Problem now provides a kind of drive device for display and driving method that can reduce power consumption.
According to above-mentioned technical foundation, the application uses following specific implementations to reduce the refresh power consumption of tableaux
Mode is described in detail.It is described in detail separately below with four specific embodiments, specific scheme is for example following
Four specific embodiments:
Specific embodiment 1: illustrating present embodiment, a kind of energy described in present embodiment referring to Fig. 3 and Fig. 4
The drive device for display of power consumption is enough reduced,
Due to being in the state quickly moved when picture, that is, when showing dynamic menu, display panel can constantly update frame picture
Face data, but for display tableaux when, this update action still can be carried out constantly, however tableaux do not need update number
According to, therefore data update action when tableaux will result in a large amount of power consumption.
For these reasons, a kind of drive device for display can reduce power consumption described in present embodiment, referring to Fig. 4
It is illustrated, as shown, a kind of drive device for display that can reduce power consumption includes: judgment module and output control mould
Block, judgment module is no for dynamic menu for judging that display is currently shown, and output control module can be according to reception
The result arrived obtains control instruction.That is:
It is no for dynamic menu to judge that display is currently shown first with judgment module, because only that current display is dynamic
When state picture, just need to start following movement using output control module:
Sequence controller controls fan-out area and sends output enable signal to source electrode membrane of flip chip, so that display panel obtains
New data-signal.
In said structure, output module is controlled in dynamic menu present embodiment, so that display panel obtains newly
Data-signal.That is: only when showing dynamic menu, the picture data of TCON output can just change for output module control, then show
Show that panel just needs to receive new picture signal and can obtain new picture, and guarantees the fluency of current picture, while just
Picture data update action caused when display tableaux is avoided, tableaux refreshing is eliminated.
Further, output control module can also be used to when showing tableaux, so that the data of display panel are believed
It number does not update.That is: for output control module when showing tableaux, the picture data of TCON output is constant, then display panel is not
New signal is received, picture data update action caused when display tableaux is also avoided, eliminates tableaux
Refresh.
Specific embodiment 2: illustrating that present embodiment, present embodiment are to described in specific embodiment one referring to Fig. 5
A kind of drive device for display that can reduce power consumption be further described, in present embodiment,
Further, it is illustrated referring to Fig. 5, as shown, specifically including in judgment module with lower unit: acquisition is single
Then collected data are sent to pair by member and comparison unit, acquisition unit for acquiring the continuous frame picture data of two width
Than in unit, comparison unit has both the effect of storage former frame picture data simultaneously, also by former frame picture data and currently
Picture data is compared.
It is specific:
Constantly acquire each frame picture data to be played using acquisition unit, it may be assumed that TCON storage inside it is each
Frame picture data.
It is using comparison unit detection former frame picture data and current picture data (that is: the continuous picture data of two frames)
It is no identical, if the continuous picture data of two frames is identical, then it represents that data are not updated, next frame picture and former frame picture institute
The image of display is identical, then also meaning that tableaux is currently shown in display, if the continuous picture data of two frames is not
Together, then it represents that data are updated, and next frame picture is different from image shown by former frame picture, then also meaning that aobvious
Show that device currently shows dynamic menu.
And for output control module, specific circuit structure are as follows:
In the fan-out area of display embedded with a N-MOS pipe, the level controling signal output end connection of sequence controller
The grid of N-MOS pipe, the drain electrode of the enable signal output end connection N-MOS pipe of sequence controller, the source electrode of N-MOS pipe connect source
The enable signal input terminal of very thin films flip.
The working principle of above structure is as follows: being illustrated referring to Fig. 3, as shown, wherein M1 is N-MOS pipe, C M1
Level controling signal, OE (Output Enable, output enabled) is the enable signal of TCON output, and OE_I is that S-COF can
The input of the correspondence OE received enables signal.
N-MOS pipe: N-MOS full name in English are as follows: N-Mental-Oxide-Semiconductor looks like for N-type metal-oxygen
Compound-semiconductor, and the transistor for possessing this structure is referred to as N-MOS transistor.N-MOS transistor is a kind of logic circuit
In common transistor, it has there are three connecting pin, respectively grid (G), drain electrode (D) and source electrode (S),
Its at work, the condition of conducting is as follows: uG-uS grid and source electrode are height, and uGS grid and voltage between source electrodes are out
Voltage is opened, i.e. the enhanced pipe of NMOS: uG-uS > 0, and | uG-uS | > | uGS (th) |, uGS | th | it is cut-in voltage.
It is so applied in practice, then are as follows:
Grid is high level, then N-MOS pipe is connected, and electric current flows to source electrode by draining.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, the N-MOS pipe positioned at fan-out area is connected, the end PCB hair
Output enable signal out can be transmitted by N-MOS pipe, and S-COF is enabled to detect the failing edge of OE signal, and S-COF is received
OE_I=OE, to viewing area, viewing area obtains new data-signal and carries out data brush outputting data signals S-COF again at this time
Newly.
When logic level C is L (low), i.e. low level 0V, the N-MOS pipe positioned at fan-out area turns off, and the end PCB issues
Output enable signal can not be transmitted by N-MOS pipe, at this time S-COF detecting less than OE signal failing edge, S-COF
New data are not received, new data-signal would not be also exported to output display area, viewing area is not refreshed, and then will not make
At the loss of power consumption.It finally realizes the effect selectively refreshed, reduces power consumption.
The correlation for the signal between signal that the present apparatus is related 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 | Shutdown |
| OE_I | OE_I=OE | OE_I does not receive signal |
| Viewing area | Refresh | Do not refresh |
In above embodiment, N-MOS pipe is embedded in the fan-out area of display, be due to:
Fanout area is the coupling part of display area signal line and driver, and function is by the digital signal of driver
It drives number letter N-MOS pipe number to be input to display area using logic gate, the number that single logic gate can drive can be measured
The maximum of signal input.And the effect of N-MOS pipe is just being determined whether to cover the output signal of sequence controller to source electrode film
Crystalline substance is transmitted.Therefore, in above embodiment, N-MOS pipe is embedded in the fan-out area of display, and then control signal to be
No transmission.
A kind of drive device for display can reduce power consumption described in present embodiment refreshes dynamic in refresh process
Work can automatically be judged by picture data type, do not needed user and manually controlled, and will be suitable for currently aobvious
Show that the refresh activity of picture scene shown by device is selected.In comparison, the prior art can not allow the refreshing of display panel
Movement is controlled, and is varied or adjusted.
Therefore, a kind of drive device for display can reduce power consumption described in this present embodiment, can satisfy existing
The demand of technology, improve user's visual experience, reduce dynamic fuzzy high refresh rate set by force under so that the brush of tableaux
New element is inhibited, and allows energy consumption minimization when updating display panel, promotes electricity usage efficiency, reduces energy consumption.
Further, since the thin film transistor (TFT) (TFT) in display panel still has certain electric leakage in an off state
Stream, so that the picture retention time achieved by storage capacitance is limited in display panel, so that above embodiment is aobvious
Show that panel leads to the decline for showing image quality with the extension of tableaux time, to solve the above problems, the present invention is real
A kind of time sequence control device that the mode of applying provides, comprising:
Module one: whether identical as previous frame image data for detecting current frame image data；
Module one while link block two and module five,
If current frame image data are identical as previous frame image data, drive module two works,
If current frame image data are different from previous frame image data, drive module five works；
Module two: for count value M to be added 1；
Since the time interval between adjacent two field pictures under normal circumstances is fixed value, be can reflect out by count value M
From recently time to source electrode driver input data signal up to current time length of time；
Two link block three of module；
Module three: for judging whether presently described count value M is 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, the work of drive module four is held,
If presently described count value M is greater than or equal to preset value N, the work of drive module five is held；
Wherein, preset value N can be 3,5 and 6 etc.；
Module four: for stopping the source electrode driver input data signal to display panel, and the display panel is controlled
In thin film transistor (TFT) it is in an off state；
Four link block five of module；
Module five: it is then shown to the source electrode driver input data signal to described according to the current frame image data
Show the gate drivers input control signal of panel；
Five link block six of module；
Module six: the count value M is reset.
The time sequence control device that embodiment of the present invention provides, when detecting current frame image data and previous frame image number
When according to being identical, judge that display panel is in tableaux state, and stop the source electrode driver input data to display panel
Signal, control the display panel in thin film transistor (TFT) it is in an off state, thus not needing to source electrode driver input data
Make the current frame image data of display panel identical as previous frame image data holding in the case where signal, thereby reduces display
The power consumption of panel.
In addition, inputting number to source electrode driver in time when detecting the constant situation of display panel continuous multiple frames image
It is believed that number, the picture of display panel is updated to gate drivers input control signal, to ensure that display surface
The image quality of plate.
In addition, 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 products or components having a display function such as Digital Frame, mobile phone, tablet computer.
In the prior art, there are a kind of power supply units of display panel source electrode driver, comprising:
Sequence controller, whole grayscale values of the current line image data for analyzing video data obtain a selected ash
Rank value；And an analog power voltage is determined according to the selected grayscale value；
It is coupled to the suitable power supervisor of the timing control, the power supervisor is used for the analog power voltage
For source electrode driver power supply.
Preferably, the sequence controller, filtering out includes the one of the selected grayscale value in the preset grey-scale range of N group
Group grey-scale range tables look-up according to the one group of grey-scale range including the selected grayscale value filtered out and determines the analog power
Voltage.
Preferably, the sequence controller is also used to save the entire grey-scale range division in advance by the display panel
Obtained N group grey-scale range, N are the integer more than or equal to 3 and less than or equal to 10.
Preferably, the range for the grayscale value that the display panel is shown is 0~63.
Preferably, the range for the grayscale value that the display panel is shown is 0~254.
A kind of power supply unit of above-mentioned display panel source electrode driver has the beneficial effect that:
For the source electrode driver power supply voltage with video data the current line image data grayscale value change
Change and adjust, it is not necessary to be always held at higher constant power voltage, reduce the power consumption of display device.
A kind of power supply unit of above-mentioned display panel source electrode driver provides a kind of display device, including voltage transformation simultaneously
Device, gamma voltage generator and the source electrode driver for being coupled to the gamma voltage generator；
It further include the power supply unit of display panel source electrode driver described in embodiment as above.
The gamma voltage generator is coupled to the sequence controller, and the voltage changer is the display device
Sequence controller and power supervisor；
The analog power voltage that the power supervisor is also used to determine with the sequence controller is the gamma voltage
Generator power supply.
Above-described embodiment has the beneficial effect that:
For the source electrode driver power supply voltage with video data the current line image data grayscale value change
Change and adjust, it is not necessary to be always held at higher constant power voltage, reduce the power consumption of display device.
Specific embodiment 3: present embodiment is illustrated referring to figure 6 and figure 7, a kind of energy described in present embodiment
The display drive method of power consumption is enough reduced,
Due to being in the state quickly moved when picture, that is, when showing dynamic menu, display panel can constantly update frame picture
Face data, but for display tableaux when, this update action still can be carried out constantly, however tableaux do not need update number
According to, therefore data update action when tableaux will result in a large amount of power consumption.
For these reasons, a kind of display drive method can reduce power consumption described in present embodiment, referring to Fig. 6
It is illustrated:
When system operates normally, TCON can be stored with the frame picture data shown, in present embodiment, exactly be utilized
The picture data stored in TCON judges whether the picture currently shown is tableaux.Its specific judgment method
It is as follows:
It is no for dynamic menu that S101 judges that display is currently shown: by the continuous picture of two frames of TCON storage inside
Data (former frame picture data and present frame picture data) compare, if two frame data are identical, prove that display is current
The picture of display is tableaux；If two groups of data are different, prove that the picture that display is currently shown is dynamic menu.
It detects former frame picture data and whether current picture data (that is: the continuous picture data of two frames) is identical, such as Fig. 7
It is shown:
S201 acquires the continuous frame picture data of two width；
Whether S202 detects the continuous frame picture data of two width identical；
If they are the same, display is currently shown in tableaux to S203；
S204 is if it is different, display currently shows dynamic menu.
If the continuous picture data of two frames is identical, then it represents that data are not updated, next frame picture and former frame picture
Shown image is identical, then also meaning that tableaux is currently shown in display, if the continuous picture data of two frames
It is different, then it represents that data are updated, and next frame picture is different from image shown by former frame picture, then also meaning that
Display currently shows dynamic menu.
After the state for having known current display picture, present embodiment is refreshed further according to the state of display picture
Or static movement, this makes it possible to refresh power consumptions when thoroughly avoiding tableaux.Its specific display driving side
Method is as follows:
S102 controls fan-out area using sequence controller 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 panel does not update.
In this method only in dynamic menu, it is defeated to the transmission of source electrode membrane of flip chip that fan-out area is controlled using sequence controller
Enable signal out, so that display panel obtains new data-signal, it may be assumed that carry out refresh activity, guarantee what present displays were shown
Picture is smooth.
Present embodiment is in above-mentioned steps, in dynamic menu, so that display panel obtains new data-signal.That is:
Only when showing dynamic menu, the picture data of TCON output can just change, then display panel just needs to receive new picture
Signal can obtain new picture, and guarantee the fluency of current picture, while avoid to be made when display tableaux
At picture data update action, eliminate tableaux refreshing.
It and is number of the our rule for the display panel of display tableaux when showing tableaux for judging result
It is believed that number not updating, it may be assumed that without refreshing, this makes it possible to the power consumptions of refresh activity when completely avoiding tableaux, finally
It realizes the effect selectively refreshed, reduces power consumption.
Specific embodiment 4: present embodiment is to can reduce the aobvious of power consumption to a kind of described in specific embodiment three
Show that device driving method is further described, in present embodiment,
Further, in aforementioned display device driving method, in practical application, the specific operation method is as follows, further
Ground discloses its key points for operation:
Firstly, N-MOS pipe is embedded in fan-out area；
Above-mentioned movement is only to increase a mos pipe on original circuit, and at low cost, connection relationship is simple, the work of mos pipe
It is far from enough for power is consumed compared to power consumed by refresh activity is carried out under tableaux, therefore, increased mos
Pipe will not cause new burden to primary circuit.
Specific embodiment 5: present embodiment is to can reduce the aobvious of power consumption to a kind of described in specific embodiment five
Show that device driving method is further described, in present embodiment,
Further, when actual control method operates, if the picture that present displays are shown is dynamic menu, when
Sequence controller to N-MOS pipe export 3.3V high level so that N-MOS pipe be connected, at this point, sequence controller by fan-out area to
Source electrode membrane of flip chip sends output enable signal, and display panel obtains new data-signal, and viewing area carries out Refresh Data.
If the picture that present displays are shown is tableaux, sequence controller exports 0V low level to N-MOS pipe, makes
The shutdown of N-MOS pipe, at this point, sequence controller can not send output enable signal to source electrode membrane of flip chip by fan-out area,
Display panel can not obtain new data-signal, and viewing area is not refreshed, and not will cause the loss of power consumption.It is final to realize selectivity
The effect of refreshing reduces power consumption.
N-MOS pipe: N-MOS full name in English are as follows: N-Mental-Oxide-Semiconductor looks like for N-type metal-oxygen
Compound-semiconductor, and the transistor for possessing this structure is referred to as N-MOS transistor.N-MOS transistor is a kind of logic circuit
In common transistor, it has there are three connecting pin, respectively grid (G), drain electrode (D) and source electrode (S),
Its at work, the condition of conducting is as follows: uG-uS grid and source electrode are height, and uGS grid and voltage between source electrodes are out
Voltage is opened, i.e. the enhanced pipe of NMOS: uG-uS > 0, and | uG-uS | > | uGS (th) |, uGS | th | it is cut-in voltage.
It is so applied in practice, then are as follows:
Grid is high level, then N-MOS pipe is connected, and electric current flows to source electrode by draining.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, the N-MOS pipe positioned at fan-out area is connected, the end PCB hair
Output enable signal out can be transmitted by N-MOS pipe, and S-COF is enabled to detect the failing edge of OE signal, and S-COF is received
OE_I=OE, to viewing area, viewing area obtains new data-signal and carries out data brush outputting data signals S-COF again at this time
Newly.
When logic level C is L (low), i.e. low level 0V, the N-MOS pipe positioned at fan-out area turns off, and the end PCB issues
Output enable signal can not be transmitted by N-MOS pipe, at this time S-COF detecting less than OE signal failing edge, S-COF
New data are not received, new data-signal would not be also exported to output display area, viewing area is not refreshed, and then will not make
At the loss of power consumption.
The correlation between signal that this method is related to is as shown in table 2:
Table 2
A kind of display drive method can reduce power consumption described in present embodiment refreshes dynamic in refresh process
Work can automatically be judged by picture data type, do not needed user and manually controlled, and will be suitable for currently aobvious
Show that the refresh activity of picture scene shown by device is selected.In comparison, the prior art can not allow the refreshing of display panel
Movement is controlled, and is varied or adjusted.
Therefore, a kind of display drive method can reduce power consumption described in this present embodiment, can satisfy existing
The demand of technology, improve user's visual experience, reduce dynamic fuzzy high refresh rate set by force under so that the brush of tableaux
New element is inhibited, and allows energy consumption minimization when updating display panel, promotes electricity usage efficiency, reduces energy consumption.
Further, since the thin film transistor (TFT) (TFT) in display panel still has certain electric leakage in an off state
Stream, so that the picture retention time achieved by storage capacitance is limited in display panel, so that above embodiment is aobvious
Show that panel leads to the decline for showing image quality with the extension of tableaux time, to solve the above problems, now providing one
Kind sequential control method, is illustrated referring to Fig. 8, is a kind of sequential control method that embodiment of the present invention provides as shown in the figure
Flow chart, comprising:
S21: whether detection current frame image data and previous frame image data are identical,
If so, step S22 is executed,
If it is not, executing step S25；
S22: count value M is added 1；Since the time interval between adjacent two field pictures under normal circumstances is fixed value, pass through
Count value M can reflect out from recently time to source electrode driver input data signal up to current time length of time.
S23: judging whether presently described count value M is less than preset value N, N >=2,
If presently described count value M is less than preset value N, step S24 is executed,
If presently described count value M is greater than or equal to preset value N, step S25 is executed；
Wherein, preset value N can be 3,5 and 6 etc.；
S24: stop the source electrode driver input data signal to display panel, and control the film in the display panel
Transistor is in an off state；
S25: then according to the current frame image data to the source electrode driver input data signal, to the display surface
The gate drivers input control signal of plate executes step S26；
S26: the count value M is reset.
The sequential control method that embodiment of the present invention provides, when detecting current frame image data and previous frame image number
When according to being identical, judge that display panel is in tableaux state, and stop the source electrode driver input data to display panel
Signal, control the display panel in thin film transistor (TFT) it is in an off state, thus not needing to source electrode driver input data
Make the current frame image data of display panel identical as previous frame image data holding in the case where signal, thereby reduces display
The power consumption of panel.
In addition, inputting number to source electrode driver in time when detecting the constant situation of display panel continuous multiple frames image
It is believed that number, the picture of display panel is updated to gate drivers input control signal, to ensure that display surface
The image quality of plate.In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, are integrally connected, are also possible to detachably connect
It connects；It can be the connection inside two elements；It can be directly connected, it can also indirectly connected through an intermediary, for this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Although describing the present invention herein with reference to specific embodiment, it should be understood that, these realities
Apply the example that example is only principles and applications.It should therefore be understood that can be carried out to exemplary embodiment
Many modifications, and can be designed that other arrangements, without departing from spirit of the invention as defined in the appended claims
And range.
It should be understood that different appurtenances can be combined by being different from mode described in original claim
Benefit requires and feature described herein.It will also be appreciated that the feature in conjunction with described in separate embodiments can be used
In other described embodiments.
Claims (8)
1. a kind of drive device for display that can reduce power consumption characterized by comprising
Judgment module, for judging that it is no for dynamic menu that display is currently shown；
Output control module, for utilizing timing when the judgment module judges that currently dynamic menu is shown in display
Controller controls fan-out area and sends output enable signal to source electrode membrane of flip chip, so that display panel obtains new data letter
Number,
Wherein, the output control module includes that the N-MOS positioned at fan-out area is managed,
The level controling signal output end of the sequence controller connects the grid of the N-MOS pipe, the sequence controller
Enable signal output end connects the drain electrode of the N-MOS pipe, the enabled letter of the source electrode connection source electrode membrane of flip chip of the N-MOS pipe
Number input terminal.
2. drive device for display according to claim 1, which is characterized in that the judgment module includes with lower unit:
Acquisition unit: for acquiring the continuous frame picture data of two width；
Comparison unit: it is whether identical for detecting the continuous frame picture data of two width,
If they are the same, then judge that display currently shows tableaux,
If it is different, then judging that display currently shows dynamic menu.
3. drive device for display according to claim 2, which is characterized in that in the acquisition unit, two width are continuous
Frame picture data is respectively as follows: the former frame picture data and present frame picture data of the sequence controller storage inside.
4. a kind of display drive method that can reduce power consumption, which comprises the following steps:
It is no for dynamic menu to judge that display is currently shown；
When showing dynamic menu, fan-out area is controlled using sequence controller and sends output enable signal to source electrode membrane of flip chip,
So that display panel obtains new data-signal,
Wherein, described to include: to source electrode membrane of flip chip transmission output enable signal using sequence controller control fan-out area
N-MOS pipe is connected to the N-MOS pipe output high level being embedded in fan-out area in sequence controller, in the N-MOS
In the state of pipe conducting, sequence controller sends output enable signal to source electrode membrane of flip chip by fan-out area, so that display
Panel obtains new data-signal.
5. display drive method according to claim 4, which is characterized in that when display tableaux, make display panel
Data-signal do not update.
6. display drive method according to claim 4, which is characterized in that the judgement display is currently shown
It is no to include: for dynamic menu
The continuous frame picture data of two width is acquired,
Whether identical detect the continuous frame picture data of two width,
If it is different, then judging that display currently shows dynamic menu；
If they are the same, then judge that display is currently shown in tableaux.
7. display drive method according to claim 6, which is characterized in that the continuous frame picture data difference of two width
Are as follows: the former frame picture data and present frame picture data of sequence controller storage inside.
8. display drive method according to claim 5, which is characterized in that when the display tableaux, make to show
The data-signal of panel, which does not update, includes:
Sequence controller turns off N-MOS pipe to the N-MOS pipe output low level in fan-out area, and sequence controller cannot
Output enable signal is sent to source electrode membrane of flip chip by fan-out area, prevent display panel is from obtaining new data-signal.
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| CN108877646B (en) * | 2018-07-26 | 2020-03-06 | 厦门凌阳华芯科技有限公司 | Display circuit and display |
| CN109036246B (en) * | 2018-08-10 | 2023-11-14 | 京东方科技集团股份有限公司 | Display panel, display method and display device |
| CN109192164A (en) * | 2018-10-10 | 2019-01-11 | 惠科股份有限公司 | Display device and its method for eliminating shutdown ghosting image |
| CN109243390B (en) * | 2018-10-15 | 2020-12-25 | 深圳市华星光电技术有限公司 | Data driving integrated circuit and liquid crystal display |
| CN109697951B (en) * | 2019-03-14 | 2021-04-23 | 惠科股份有限公司 | Drive circuit and display panel |
| CN110675799A (en) * | 2019-10-08 | 2020-01-10 | 奕力科技股份有限公司 | Driving device and transmission method of display data thereof |
| CN110890063B (en) * | 2019-11-22 | 2021-10-08 | 深圳市华星光电半导体显示技术有限公司 | Method and device for reducing power consumption of display panel |
| CN111768738B (en) * | 2020-06-11 | 2021-11-23 | 昇显微电子(苏州)有限公司 | Circuit design method for reducing refresh rate and saving power consumption of AMOLED display driving chip |
| CN111787258A (en) * | 2020-07-29 | 2020-10-16 | 宏祐图像科技(上海)有限公司 | Video processing device, video decoding device and display control method |
| CN112037725B (en) * | 2020-08-28 | 2023-01-10 | 青岛信芯微电子科技股份有限公司 | Display device and display method |
| CN111968594B (en) * | 2020-09-08 | 2022-04-15 | 京东方科技集团股份有限公司 | Display driving method, display driving system and display device |
| CN112951171B (en) * | 2021-01-29 | 2022-12-20 | 昆山龙腾光电股份有限公司 | Display device and driving method |
| CN113066430A (en) * | 2021-03-22 | 2021-07-02 | 硅谷数模(苏州)半导体有限公司 | Time schedule controller and display system |
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