CN109509432A - Active matrix organic light-emitting diode display device and its driving method - Google Patents
Active matrix organic light-emitting diode display device and its driving method Download PDFInfo
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- CN109509432A CN109509432A CN201710865487.3A CN201710865487A CN109509432A CN 109509432 A CN109509432 A CN 109509432A CN 201710865487 A CN201710865487 A CN 201710865487A CN 109509432 A CN109509432 A CN 109509432A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
Abstract
The present invention provides active matrix organic LED display device and its driving method, and wherein display device includes: display panel, including two voltage input ends；Power supply chip, including two first voltage output ends are electrically connected with two voltage input ends respectively, for providing two first voltages under the first operating mode to display panel；Control mainboard, for generating display data；Driving chip generates scanning signal according to display data and data-signal driving display panel shows picture；Driving chip further includes that two second voltage output ends are electrically connected with two voltage input ends respectively, for providing two second voltages under the second operating mode to display panel；Control mainboard generates voltage control signal control power supply chip or driving chip according to display data and powers to display panel.The present invention carries out dynamic adjustment to the driving voltage of display device, is powered respectively by power supply chip or driving chip under different working modes, greatly reduces display power consumption.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of active matrix organic light-emitting diode display device and its
Driving method.
Background technique
Active matrix organic light-emitting diode (Active-Matrix Organic Light Emitting Diode, letter
Claiming AMOLED) display device is a kind of mainly using organic semiconductor and luminescent material under electric field driven, it is infused by carrier
Enter and compound and luminous display unit.Compared to traditional LC D (Liquid Crystal Display, liquid crystal display),
AMOLED display device have the advantages that response speed faster, colour gamut is wider, contrast is higher, self-luminous and power consumption are lower.
AMOLED display device (such as wrist-watch, mobile phone etc.) at present, screen operate mainly in both of which, such as common mould
Formula and standby mode.General mode (Normal Mode) is mainly that user persistently operates equipment and locates screen always
In the one mode of active state, in such a mode, screen refresh frequency is high, and power consumption data is high, and energy band is good to user
Display effect.Standby mode, that is, low-power consumption mode (IDLE Mode) does not mainly operate equipment for a long time and makes screen
A kind of mode in idle state.In such a mode, AMOLED generally can be there are two types of state, and one is continue to use LCD not
Display state, power consumption of screen data are lower at this time, but cause user experience poor without display；Another kind is display pattern, simultaneously
Brightness is reduced, screen refresh frequency is reduced.
With AMOLED application it is continuous popular, the requirement that user shows product is also higher and higher, for current
For AMOLED product, on the basis of guaranteeing good display effect, the height of power consumption becomes the main of product core competitiveness
Aspect.Currently, the display of AMOLED is all made of the mode of independent current source chip offer fixed driving voltage in each mode,
Claim constant current driving.Specifically, AMOLED duplex feeding (positive pressure and negative pressure) derives from independent current source chip, positive pressure size and
Vacuum magnitude is fixed at Normal Mode and IDLE Mode, and the size of AMOLED positive/negative-pressure will directly influence AMOLED
The power consumption data of display, and the transfer efficiency of independent current source chip is relatively low, is generally operational in 80% or so, causes to show function
It is higher to consume data.
It should be noted that information is only used for reinforcing the reason to background of the invention disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
For the defects in the prior art, the purpose of the present invention is to propose to the solution party that a kind of reduction AMOLED shows power consumption
Case adjusts the driving voltage of AMOLED by dynamic, realizes and keeps good display picture while reducing power consumption of screen.
According to an aspect of the present invention, a kind of active matrix organic light-emitting diode display device is provided, comprising: display
Panel, including scanning signal input terminal, data signal input and two voltage input ends；Power supply chip, including two first
Voltage output end is electrically connected with two voltage input ends of the display panel respectively, for providing to the display panel
Two first voltages under first operating mode；Control mainboard, for generating the display number for showing picture for the display panel
According to；Driving chip, including scanning signal output end generate scanning signal according to the display data and are delivered to the display panel
Scanning signal input terminal and data signal output, according to the display data generate data-signal be delivered to the display
The data signal input of panel, to drive the display panel to show picture；The driving chip further includes two second electricity
Output end is pressed, is electrically connected respectively with two voltage input ends of the display panel, for providing the to the display panel
Two second voltages under two operating modes；And the control mainboard is output to the display of the display panel according to every frame
Data generate voltage control signal, control the power supply chip by the voltage control signal and power to the display panel,
Or the control driving chip is powered to the display panel.
In a preferred embodiment, the control mainboard is output to the display number of the display panel according to every frame
According to, generate display cross-pressure needed for the display panel shows picture, and by the voltage control signal by the display across
Pressure is transferred to the driving chip；In the first operation mode, the driving chip is converted to the voltage control signal pair
The output of pulse signal answered to the power supply chip, the power supply chip is mentioned according to the pulse signal, Xiang Suoshu display panel
It is equal to two first voltages of the display cross-pressure for cross-pressure value；In the second operation mode, the driving chip is according to
Voltage control signal, Xiang Suoshu display panel provide two second voltages that cross-pressure value is equal to the display cross-pressure.
In a preferred embodiment, the voltage control signal includes the display cross-pressure, further includes the display
The operating mode instruction of panel.
In a preferred embodiment, the operating mode instruction of the display panel is as the control mainboard according to
It shows that cross-pressure generates, when the display cross-pressure is located at the first cross-pressure range, the first operating mode instruction is obtained, when the display
When cross-pressure is located at the second cross-pressure range, the second operating mode instruction is generated.
In a preferred embodiment, the display data include each pixel unit of the corresponding display panel
Show grayscale value, the control mainboard generates institute according to the maximum gray value in the display grayscale value of each pixel unit
State display cross-pressure.
In a preferred embodiment, two first voltages are respectively the first positive voltage and the first negative voltage, or
Person, two first voltages are respectively the first high voltage and the first low-voltage；And two second voltages are respectively
Two positive voltages and the second negative voltage, alternatively, two second voltages are respectively the second high voltage and the second low-voltage.
In a preferred embodiment, the display panel includes viewing area and non-display area, and the driving chip is set
In the non-display area of the display panel.
In a preferred embodiment, the power supply chip is set in the control mainboard, and the control mainboard passes through
One flexible circuit board and the driving chip are electrically connected.
In a preferred embodiment, the operating voltage of the power supply chip and the driving chip is by the control
Mainboard provides.
According to another aspect of the present invention, a kind of driving side of active matrix organic light-emitting diode display device is provided
Method, based on above-mentioned active matrix organic light-emitting diode display device, the driving method include: within each frame period,
The control mainboard generates the display data that picture is shown for the display panel；The driving chip is according to the display data
Scanning signal and data-signal are generated, and drives the display panel to show picture according to the scanning signal and the data-signal
Face；And the control mainboard generates display cross-pressure needed for the display panel shows picture according to the display data,
And the display cross-pressure is exported to the driving chip by voltage control signal；In the first operation mode, the driving
The voltage control signal is converted to corresponding output of pulse signal to the power supply chip by chip, the power supply chip according to
The pulse signal, Xiang Suoshu display panel provide two first voltages that cross-pressure value is equal to the display cross-pressure；In the second work
Under operation mode, according to the voltage control signal, Xiang Suoshu display panel provides cross-pressure value and is equal to described show the driving chip
Show two second voltages of cross-pressure.
In a preferred embodiment, the display data include each pixel unit of the corresponding display panel
Show grayscale value, the control mainboard generates institute according to the maximum gray value in the display grayscale value of each pixel unit
State display cross-pressure.
In view of this, the beneficial effect of the present invention compared with prior art is: the present invention is to AMOLED display device
Driving voltage carries out dynamic adjustment, controls power supply chip in the first operation mode and powers to display panel, enough to provide
Driving voltage guarantees good display picture；Control driving chip is powered to display panel in the second operation mode, with power supply
The comparison of chip power supply mode on original circuit design without influence, and turns without increasing any component there is no power supply chip
Change efficiency, control mainboard will not because of power supply chip power supply and generate heat serious, power consumption data is greatly reduced.Separately
Outside, power consumption data can not only be greatly reduced in the dynamic adjustment of AMOLED driving voltage, and can also improve the display effect of AMOLED
Fruit.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.It should be evident that the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 shows a kind of structure of active matrix organic light-emitting diode display device in exemplary embodiment of the present and shows
It is intended to；
Fig. 2 shows the entirety of active matrix organic light-emitting diode display device a kind of in exemplary embodiment of the present to drive
Dynamic schematic diagram；
Fig. 3 shows a kind of driving side of active matrix organic light-emitting diode display device in exemplary embodiment of the present
The step schematic diagram of method；
Fig. 4 shows a kind of driving system of active matrix organic light-emitting diode display device in exemplary embodiment of the present
System schematic diagram.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure
Icon note indicates same or similar structure, thus will omit repetition thereof.
Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner
In.In the following description, many details are provided to provide and fully understand to embodiments of the present invention.However,
One of ordinary skill in the art would recognize that without one or more in specific detail, or use other methods, constituent element etc.,
Technical solution of the present invention can also be practiced.In some cases, known features or operation are not shown in detail or describe to keep away
Exempt from the fuzzy present invention.
It,, can not be by adjusting screen because requiring display effect etc. at Normal Mode for AMOLED display device
Refreshing frequency etc. realizes the reduction of power consumption, so, the height of power consumption data is primarily limited to AMOLED under present Normal Mode
Material and its luminous efficiency, power consumption data it is relatively high；At IDEL Mode, function can be reduced by adjusting driving method
Consume data.And the prior art in each mode can be because of power supply chip conversion ratio itself not in such a way that power supply chip drives
High factor increases unnecessary display power consumption.
Fig. 1 is a kind of structural representation of active matrix organic light-emitting diode display device in exemplary embodiment of the present
Figure.Shown in referring to Fig.1, organic LED display device (hereinafter referred to as AMOLED display device) of the invention is mainly wrapped
It includes:
Display panel 1, including scanning signal input terminal 11, data signal input 12 and two 13 and of voltage input end
14.It should be noted that display panel 1 includes the pixel array (not shown) for display, pixel array includes multiple pixels
Unit, each pixel unit all have scanning signal input terminal, data signal input and generating positive and negative voltage input terminal (or for height
Low-voltage input terminal).The scanning signal input terminal of multiple pixel units may be coupled to a plurality of shared scan signal line, multiple
The data signal input of pixel unit may be coupled to a plurality of shared data signal line, the positive voltage of multiple pixel units
(high voltage) input terminal may be coupled to a plurality of shared positive voltage (high voltage) input line, the negative voltage of multiple pixel units
(low-voltage) input terminal may be coupled to a plurality of shared negative voltage (low-voltage) input line.It is not described in the present embodiment conveniently,
The a plurality of shared scan signal line of pixel array is uniformly denoted as scanning signal input terminal 11, by a plurality of total of pixel array
Data signal line is uniformly denoted as data signal input 12, and a plurality of shared positive voltage (high voltage) of pixel array is defeated
Enter end and be uniformly denoted as voltage input end 13, a plurality of shared negative voltage (low-voltage) input terminal of pixel array is uniformly denoted as
Voltage input end 14.
Power supply chip 2, including two first voltage output ends 21 and 22, respectively with two voltage inputs of display panel 1
End 13 and 14 is electrically connected, for providing two first voltages under the first operating mode to display panel 1.
Control mainboard 3, for generating the display data 31 for showing picture for display panel 1；Driving chip 4, including scanning
Signal output end 41 generates the scanning signal input terminal 11 that scanning signal is delivered to display panel 1, sum number according to display data 31
According to signal output end 42, the data signal input 12 that data-signal is delivered to display panel 1 is generated according to display data 31, is driven
Dynamic display panel 1 shows picture.
Further, driving chip 4 further includes two second voltage output ends 41 and 42, respectively with the two of display panel 1
A voltage input end 13 and 14 is electrically connected, for providing two second voltages under the second operating mode to display panel 1.Its
In, wherein first operating mode can refer to the normal operation mode (i.e. Normal Mode) of display panel 1, first
Display panel 1 needs higher driving voltage under operating mode, to provide good display picture.Second operating mode can refer to
The standby mode (i.e. IDEL Mode) of display panel 1, display panel 1 only needs lower driving electricity in the second operation mode
Pressure, display picture to show darker brightness while, save power consumption.Alternatively, the first operating mode can refer to display panel 1
Standby mode, or be low-power consumption mode, i.e. IDEL Mode；Second operating mode can refer to the normal operation mould of display panel 1
Formula, i.e. Normal Mode.That is, the first operating mode and the second operating mode are mainly used for distinguishing display panel 1 not
With the display pattern of power consumption type, the driving voltage under the first operating mode can be higher than the second operating mode, can also be lower than
Second operating mode.
Control mainboard 3 is output to the display data of display panel 1 according to every frame, generates voltage control signal, passes through voltage
It controls signal control power supply chip 2 to power to display panel 1, or control driving chip 4 is powered to display panel 1.
Specifically, control mainboard 3 is output to the display data of display panel 1 according to every frame, generates display panel 1 and show picture
(the generating positive and negative voltage (or high-low voltage) needed for display cross-pressure refers to the driving display picture of display panel 1 of display cross-pressure needed for face
Voltage difference), and by voltage control signal by show cross-pressure be transferred to driving chip 4；In the first operation mode, core is driven
Voltage control signal is converted to corresponding output of pulse signal to power supply chip 2 by piece 4, and power supply chip 2 can be according to the pulse
Signal provides two first voltages that cross-pressure value is equal to display cross-pressure to display panel 1, makes the work of display panel 1 in the first work
Mode provides good display picture.Wherein, specifically display content and display mode are passed through display panel 1 by driving chip 4
Scanning signal and data-signal driving.In the second operation mode, driving chip 4 is according to voltage control signal, directly to display
Panel 1 provides two second voltages that cross-pressure value is equal to display cross-pressure, makes the work of display panel 1 in the second operating mode, provides
Display power consumption is reduced while showing picture.
Further, voltage control signal includes display cross-pressure, further includes the operating mode instruction of display panel 1.It should
Operating mode instruction is obtained by control mainboard 3 according to the display cross-pressure analyzed, when showing that cross-pressure is located at the first cross-pressure range,
The first operating mode instruction is generated, when showing that cross-pressure is located at the second cross-pressure range, generates the second operating mode instruction.Specifically
, display data include the display grayscale value of each pixel unit of corresponding display panel 1, and control mainboard 3 is according to each pixel
Maximum gray value in the display grayscale value of unit, generates display cross-pressure.Wherein, the first cross-pressure range can be greater than the second cross-pressure
Range might be less that the second cross-pressure range.
In addition, corresponding to two voltage input ends 13 and 14 of display panel 1, if voltage input end 13 and voltage input end
Driving voltage one positive one needed for 14 is negative, then two first voltages that power supply chip 2 exports are respectively the first positive voltage and first
Negative voltage, and two second voltages that driving chip 4 exports are respectively the second positive voltage and the second negative voltage.And first positive voltage
And the first cross-pressure value between negative voltage is greater than the cross-pressure value between the second positive voltage and the second negative voltage, in the first work
There is provided higher display cross-pressure to display panel 1 under mode drives it to show good display picture, in the second operation mode
There is provided while suitable display cross-pressure guarantees that it has display picture to display panel 1 reduces display power consumption.Alternatively, first just
Cross-pressure value between voltage and the first negative voltage is less than the cross-pressure value between the second positive voltage and the second negative voltage, first
There is provided while suitable display cross-pressure guarantees that it has display picture under operating mode to display panel 1 reduces display power consumption；
There is provided higher display cross-pressure to display panel 1 in the second operation mode drives it to show good display picture.At some
In embodiment, the positive-negative polarity of voltage input end 13 and voltage input end 14 be can be interchanged, therefore the present invention is not limiting as first
Voltage output end 21 and 22, second voltage output end 43 and 44, respectively with the specific connection type of voltage input end 13 and 14.This
Field technical staff content according to the present invention, is correspondingly connected with by voltage positive-negative polarity.Alternatively, if voltage input end 13
One high and one low with driving voltage needed for voltage input end 14, then two first voltages that power supply chip 2 exports are respectively first
High voltage and the first low-voltage, and two second voltages that driving chip 4 exports are respectively the second high voltage and the second low-voltage.
And the first cross-pressure value between high voltage and the first low-voltage is greater than the cross-pressure value between the second high voltage and the second low-voltage,
Its is driven to show good display picture to provide higher display cross-pressure to display panel 1 in the first operation mode, the
There is provided while suitable display cross-pressure guarantees that it has display picture under two operating modes to display panel 1 reduces display function
Consumption.Alternatively, the cross-pressure value between the first high voltage and the first low-voltage is less than between the second high voltage and the second low-voltage
Cross-pressure value guarantees that it has the same of display picture to provide suitable display cross-pressure to display panel 1 in the first operation mode
When reduce display power consumption；There is provided higher display cross-pressure to display panel 1 in the second operation mode drives its display good
Show picture.
Fig. 2 is a kind of whole driving of active matrix organic light-emitting diode display device in exemplary embodiment of the present
Schematic diagram.Referring to figs. 1 and 2, driving chip 4 and power supply chip 2, which may each be, is integrated with the integrated of multiple circuit modules
Circuit chip (Integrated Circuit, abbreviation IC).Wherein, there are multiple input pins on driving chip (Driver IC) 4
The input signal pin 45 for the display data 31 transmitted with multiple output pins, input pin for example including reception control mainboard 3,
Receive the input voltage pin 46 for the operating voltage that control mainboard 3 provides.Output pin for example respectively includes scanning signal output
Pin (scanning signal output end) 41, data-signal output pin (i.e. data signal output) 42 and two second voltages are defeated
Pin (i.e. second voltage output end) 43 and 44 out.In addition, may also include such as rectified current output pin on driving chip 4
(not shown) etc., details are not described herein again.Also there are multiple input pins and multiple output pins on power supply chip (Power IC) 2,
Input pin for example including receive control mainboard 3 provide operating voltage input voltage pin 23, output pin for example including
Two first voltage output pins (i.e. first voltage output end) 21 and 22.
Further, display panel 1 includes viewing area and non-display area, and driving chip 4 is set to the non-display of display panel 1
Area.Power supply chip 2 can be set in control mainboard 3, and control mainboard 3 can electrically be connected by a flexible circuit board 5 with driving chip 4
It connects.Dotted line frame 10 can indicate that a display screen, display panel 1 and driving chip 4 are set to the first table of display screen curtain 10 in figure
Face (light-emitting surface), control mainboard 3 and power supply chip 2 bend the second surface for being covered on display screen 10 by flexible circuit board 5
(shady face).
The present embodiment carries out dynamic adjustment by the driving voltage to AMOLED display device, controls in the first operation mode
Power supply chip processed is powered to display panel, guarantees good display picture to provide enough driving voltages；In the second Working mould
Driving chip is controlled under formula to power to display panel, is compared with power supply chip power supply mode, without increasing any component, to original
There is circuit design without influence, and the transfer efficiency problem of power supply chip is not present, control mainboard will not be because of the confession of power supply chip
Electricity and generate heat serious, therefore power consumption data is greatly reduced.In addition, the dynamic adjustment of AMOLED driving voltage can not only be greatly reduced
Power consumption data, and the display effect of AMOLED can also be improved.
Fig. 3 is a kind of driving method of active matrix organic light-emitting diode display device in exemplary embodiment of the present
Step schematic diagram, Fig. 4 be exemplary embodiment of the present in a kind of drive of active matrix organic light-emitting diode display device
Dynamic system schematic.In conjunction with shown in Fig. 3 and Fig. 4, the driving side of active matrix organic light-emitting diode display device of the invention
Method includes:
Within each frame period, control mainboard 3 is generated shows picture (specifically by the aobvious of display panel 1 for display panel 1
Show area, or show picture for active area) display data 31；Driving chip 4 according to display data 31 generate scanning signal and
Data-signal, and picture is shown according to scanning signal and data-signal driving display panel 1.
Control mainboard 3 generates display cross-pressure needed for display panel 1 shows picture according to display data 31, and passes through
AMOLED voltage control signal 32 will show that cross-pressure is exported to driving chip 4.In the first operation mode, driving chip 4 will
AMOLED voltage control signal 32 is converted to corresponding pulse signal (or being Power IC voltage control signal), and 33 outputs are extremely
Power supply chip 2, power supply chip 2 provide cross-pressure value to display panel 1 and are equal to display according to the Power IC voltage control signal 33
Two first voltages (respectively the first positive voltage ELVDD and the first negative voltage ELVSS) of cross-pressure.In the second operation mode,
Driving chip 4 directly provides two second electricity that cross-pressure value is equal to display cross-pressure to display panel 1 according to voltage control signal 32
It presses (respectively the second positive voltage OVDD and the second negative voltage OVSS).
It should be noted that the viewing area of display panel 1 receives the interface of the driving voltage provided by driving chip 4, with
And the interface of driving voltage provided by power supply chip 2 is provided and can be identical, but it is mentioned in Fig. 4 to distinguish power supply chip 2
The driving voltage of confession, or the driving voltage provided for supply voltage (ELVDD and ELVSS) and driving chip 4, or to supply
Piezoelectric voltage (OVDD and OVSS), separates independent drafting for the two, this is not construed as limitation of the present invention.In addition, dotted line frame 5 can
A flexible circuit board is represented, control mainboard 3 can bend the back side for being covered on display panel 1 (relative to hair by flexible circuit board 5
The another side of smooth surface), and realize and be electrically connected with control mainboard 2.
Specifically, display data 31 are issued by control mainboard 3, control mainboard 3 can monitor corresponding in every frame display data 31
Maximum gray value in the display grayscale value of each pixel unit of display panel 1 generates display surface according to the maximum gray value
Display cross-pressure (namely required driving voltage size) needed for plate 1 shows picture.Then control mainboard 3 passes through AMOLED electricity
The display cross-pressure is sent to driving chip 4 by voltage-controlled signal processed 32.In the case where supplying electrically driven (operated) mode using power supply chip 2, driving
Chip 4 sends out corresponding umber of pulse to power supply chip 2 by Power IC voltage control signal 33, and power supply chip 2 is made to export institute
It need to show cross-pressure value (ELVDD and ELVSS, size can be adjusted according to the size of required display cross-pressure value).It is using
Driving chip 4 is under electrically driven (operated) mode, driving chip 4 directly passes through OVSS and OVDD output voltage to display panel 1, OVSS
It can also be adjusted according to display maximum gray value with the voltage swing of OVDD.
It is tested with an AMOLED display device, at Normal Mode, is guaranteeing the constant situation of AMOLED positive pressure
Under, 100% display area, under 100% brightness conditions, when the negative pressure of AMOLED, i.e., in the case where the volt of VSS≤- 1.2, AMOLED
The chromaticity coordinates of display device is constant.Corresponding different VSS, overall brightness variation is more gentle, and power consumption data is in certain model
It is changed greatly in enclosing.It, can be to the model of VSS dynamic adjustment in the case where AMOLED positive pressure is constant based on the above test data
It encloses and is defined, to further decrease the power consumption data of AMOLED.
To sum up, in terms of AMOLED positive/negative-pressure dynamic adjustment, power consumption can not only be greatly reduced in the dynamic change of driving voltage
Data, and the relevant issues that AMOLED is shown can also be improved.Power consumption of screen is effectively reduced in the present invention, particularly with wearable production
The stand-by time of product can effectively be extended in fixed battery capacity；In same standby time, battery can be reduced
The volume and thickness of wearable product is thinned in capacity, and can avoid the product fever unacceptable experience of bring, to product
Future development is of great significance.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
Claims (11)
1. a kind of active matrix organic light-emitting diode display device characterized by comprising
Display panel, including scanning signal input terminal, data signal input and two voltage input ends；
Power supply chip, including two first voltage output ends electrically connect with two voltage input ends of the display panel respectively
It connects, for providing two first voltages under the first operating mode to the display panel；
Control mainboard, for generating the display data for showing picture for the display panel；
Driving chip, including scanning signal output end generate scanning signal according to the display data and are delivered to the display surface
The scanning signal input terminal and data signal output of plate generate data-signal according to the display data and are delivered to described show
Show the data signal input of panel, to drive the display panel to show picture；
The driving chip further includes two second voltage output ends, respectively with two voltage input end electricity of the display panel
Property connection, for the display panel provide the second operating mode under two second voltages；And
The control mainboard is output to the display data of the display panel according to every frame, generates voltage control signal, passes through institute
It states the voltage control signal control power supply chip to power to the display panel, or controls the driving chip to the display
Panel power supply.
2. active matrix organic light-emitting diode display device as described in claim 1, which is characterized in that the control mainboard
It is output to the display data of the display panel according to every frame, generates display cross-pressure needed for the display panel shows picture,
And the display cross-pressure is transferred to by the driving chip by the voltage control signal；
In the first operation mode, the voltage control signal is converted to corresponding output of pulse signal extremely by the driving chip
The power supply chip, according to the pulse signal, Xiang Suoshu display panel provides cross-pressure value and is equal to described show the power supply chip
Show two first voltages of cross-pressure；
In the second operation mode, the driving chip provides cross-pressure according to the voltage control signal, Xiang Suoshu display panel
Value is equal to two second voltages of the display cross-pressure.
3. active matrix organic light-emitting diode display device as claimed in claim 2, which is characterized in that the voltage control
Signal includes the display cross-pressure, further includes the operating mode instruction of the display panel.
4. active matrix organic light-emitting diode display device as claimed in claim 3, which is characterized in that the display panel
Operating mode instruction generated by the control mainboard according to the display cross-pressure, when the display cross-pressure is located at the first cross-pressure model
When enclosing, the first operating mode instruction is generated, when the display cross-pressure is located at the second cross-pressure range, the second operating mode is generated and refers to
It enables.
5. active matrix organic light-emitting diode display device as claimed in claim 2, which is characterized in that the display data
The display grayscale value of each pixel unit including the correspondence display panel, the control mainboard is according to each pixel list
Maximum gray value in the display grayscale value of member, generates the display cross-pressure.
6. active matrix organic light-emitting diode display device as described in claim 1, which is characterized in that two described first
Voltage is respectively the first positive voltage and the first negative voltage, alternatively, two first voltages are respectively the first high voltage and first
Low-voltage；And
Two second voltages are respectively the second positive voltage and the second negative voltage, alternatively, two second voltages are respectively
Second high voltage and the second low-voltage.
7. active matrix organic light-emitting diode display device as described in claim 1, which is characterized in that the display panel
Including viewing area and non-display area, the driving chip is set to the non-display area of the display panel.
8. active matrix organic light-emitting diode display device as described in claim 1, which is characterized in that the power supply chip
In the control mainboard, the control mainboard is electrically connected by a flexible circuit board and the driving chip.
9. active matrix organic light-emitting diode display device as described in claim 1, which is characterized in that the power supply chip
It is provided with the operating voltage of the driving chip by the control mainboard.
10. a kind of driving method of active matrix organic light-emitting diode display device, which is characterized in that based on such as claim
Active matrix organic light-emitting diode display device described in 1~9 any one, the driving method include:
Within each frame period, the control mainboard generates the display data that picture is shown for the display panel；
The driving chip generates scanning signal and data-signal according to the display data, and according to the scanning signal and institute
Stating data-signal drives the display panel to show picture；And
The control mainboard generates display cross-pressure needed for the display panel shows picture according to the display data, and leads to
Overvoltage control signal exports the display cross-pressure to the driving chip；
In the first operation mode, the voltage control signal is converted to corresponding output of pulse signal extremely by the driving chip
The power supply chip, according to the pulse signal, Xiang Suoshu display panel provides cross-pressure value and is equal to described show the power supply chip
Show two first voltages of cross-pressure；
In the second operation mode, the driving chip provides cross-pressure according to the voltage control signal, Xiang Suoshu display panel
Value is equal to two second voltages of the display cross-pressure.
11. driving method as claimed in claim 10, which is characterized in that the display data include the corresponding display panel
Each pixel unit display grayscale value, the control mainboard according in the display grayscale value of each pixel unit most
Big grayscale value generates the display cross-pressure.
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