CN107195271B - Driving chip and display panel - Google Patents
Driving chip and display panel Download PDFInfo
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- CN107195271B CN107195271B CN201710641069.6A CN201710641069A CN107195271B CN 107195271 B CN107195271 B CN 107195271B CN 201710641069 A CN201710641069 A CN 201710641069A CN 107195271 B CN107195271 B CN 107195271B
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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]
Abstract
The present invention provides a kind of driving chip and display panel, belongs to field of display technology, can solve the problems, such as existing display panel in display it is possible that concealed wire.Driving chip of the invention includes multiple operational amplifiers, for generating the data-signal of supply display panel data line, driving chip further include: the first register corresponding with partial arithmetic amplifier, for storing adjustment data；Wherein, the data-signal that operational amplifier not corresponding with the first register generates has the first current value；The data-signal that corresponding with the first register operational amplifier generates has the second current value, and the adjustment data in the second current value and the first register corresponding to it are corresponding, and the second current value is greater than the first current value.
Description
Technical field
The invention belongs to field of display technology, and in particular to a kind of driving chip and display panel.
Background technique
Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display panel because have it is frivolous,
Energy conservation, the characteristics such as wide viewing angle, colour gamut is wide, contrast is high and the favor by people.
It include multiple pixel units in OLED display panel, OLED display panel is in display, by data-signal to picture
Storage capacitance in plain unit charges to drive OLED to shine.Wherein, data-signal passes through driving chip (Drive IC)
Output.Driving chip changes the display brightness of each pixel unit by controlling the voltage value of data-signal, to realize to OLED
The display brightness control of display panel.
With the development and application of OLED display technology, traditional standard shape OLED display panel has been not enough to support
All end products.The OLED display panel of abnormity (unconventional rectangular, such as round) cutting is come into being.Abnormity cutting
The pixel unit quantity that each data line is connected in OLED display panel is different, and load is not also identical, causes to load biggish number
The storage capacitance of the pixel unit connected according to line can not reach saturation in charging, to can occur on the screen apparent dark
Line, and then influence display effect.
In the prior art, usually improve the above problem by extending the charging time of pixel unit, but the method meeting
Cause obviously increasing for screen response time and power consumption.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art, providing one kind can be to avoid display surface
There is the driving chip of concealed wire in display in plate.
Solving technical solution used by present invention problem is a kind of driving chip, including multiple operational amplifiers,
For generating the data-signal of supply display panel data line, the driving chip further include:
The first register corresponding with partial arithmetic amplifier, for storing adjustment data；Wherein,
The data-signal that operational amplifier not corresponding with the first register generates has the first current value；
The data-signal that operational amplifier corresponding with the first register generates has the second current value, second electric current
Adjustment data in value and the first register corresponding to it are corresponding, and second current value is greater than first electric current
Value.
Preferably, operational amplifier not corresponding with the first register has the first current channels；
Operational amplifier corresponding with the first register have the second current channels, the width of second current channels and
The adjustment data in the first register corresponding to it are corresponding, and the width of second current channels is greater than first electricity
Flow the width of channel.
Preferably, first register has multiple, and the adjustment data stored at least partly the first register are different.
It is further preferred that the driving chip further include:
Second register is used for storage address data；
Corresponding unit, for being answered the operational amplifier and first register pair according to the address date.
It is further preferred that first register than second register quantity more than one.
Preferably, multiple operational amplifiers are arranged successively；
Multiple first registers are arranged successively；
The corresponding unit is specifically used for:
First operational amplifier and first first register pair are answered；
By operational amplifier corresponding with the address date successively with first in addition to first first register
Register pair is answered；
The operational amplifier not corresponding with the address date is corresponding with the operational amplifier of arrangement before it
Same first register.
Solving another technical solution used by present invention problem is a kind of display panel, which is characterized in that packet
It includes:
Driving chip described in any one of the above；
Multiple data lines, every data line connect multiple pixel units, and the operational amplifier and the data line are one by one
It is correspondingly connected with.
Preferably, the pixel unit includes storage capacitance；
The data-signal that the operational amplifier generates is used to charge to the storage capacitance.
Preferably, the quantity of the pixel unit of at least two data lines connection is different.
It is further preferred that the data line is arranged along first direction；
In a second direction perpendicular to the first direction, display panel at least two different locations in a first direction
Size it is different.
During the display of driving chip of the invention by changing display panel, the voltage of the data-signal in data line
(the storage voltage of storage capacitance i.e. in display panel) size changes and flows through the electric current of OLED, thus realize OLED is shown it is bright
Spend (grayscale) adjustment, and then avoid because partial data linear load is larger, to storage capacitance charging it is insufficient due to lead to display surface
There is the problem of concealed wire in display in plate, effectively promotes the display effect of display panel.
Detailed description of the invention
Fig. 1 is the schematic block diagram of the driving chip of the embodiment of the present invention 1；
Fig. 2 is the relation schematic diagram that voltage and charging time are stored when the storage capacitance charging of the embodiment of the present invention 1；
Fig. 3 is the structural schematic diagram of the display panel of the embodiment of the present invention 2；
Wherein appended drawing reference are as follows: 1, driving chip；11, operational amplifier；2, display panel；21, pixel unit；22, number
According to line.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Present invention is further described in detail for formula.
Embodiment 1:
As illustrated in fig. 1 and 2, the present embodiment provides a kind of driving chips 1, including multiple operational amplifiers 11, for generating
Supply the data-signal of 2 data line 22 of display panel, driving chip 1 further include: corresponding with partial arithmetic amplifier 11 first
Register, for storing adjustment data.Wherein, the data-signal tool that operational amplifier 11 not corresponding with the first register generates
There is the first current value, the data-signal that corresponding with the first register operational amplifier 11 generates has the second current value, and second
Current value with its corresponding to the first register in adjustment data it is corresponding, and the second current value be greater than the first current value.
Wherein, display panel 2 is preferably active matrix organic light emitting diode panel (Active-matrix organic
light emitting diode；AMOLED).
Display panel 2 includes multiple pixel units 21, and data line 22 is connect with pixel unit 21, during display, fortune
It calculates amplifier 11 and provides data-signal to data line 22, to charge to the storage capacitance in pixel unit 21.Pass through change
Voltage (i.e. the storage voltage of storage capacitance) size of data-signal, i.e., the changeable electric current for flowing through OLED in pixel unit 21,
To realize the adjustment to OLED display brightness (grayscale).In display, storage capacitance carries out charging and needs centainly display panel 2
Time, if the storage voltage of storage capacitance is unable to reach scheduled storage voltage in the charging time limited, then OLED's is aobvious
Show that brightness can be less than due display brightness, so that display panel 2 concealed wire etc. is occurred and show undesirable situation.
Wherein, can by data selector (mux) select display panel 2 in grid line (not shown) conducting, and
Grid line charges to the pixel unit 21 being connected with above-mentioned grid line by data line 22 when being connected.
In the present embodiment, the operational amplifier 11 in driving chip 1 generates the data letter of supply 2 data line 22 of display panel
Number, the operational amplifier 11 in driving chip 1 is divided by the first register, exports each section operational amplifier 11
Data-signal current value it is different, thus to the charge rate of storage capacitance during controlling display.
Specifically, partial arithmetic amplifier 11 is answered with the first register pair, thrust (ability for pushing electric current output) with
The adjustment data stored in first register are corresponding, thus make its export data-signal current value (the second current value) with
The adjustment data stored in first register are corresponding.Without the data of operational amplifier 11 corresponding with the first register output
Signal has fixed current value, and the current value (the first current value) of the data-signal exported is less than the second current value.It is aobvious
So, since the second current value is greater than the first current value, therefore as shown in Fig. 2, operational amplifier 11 corresponding with the first register is defeated
The timeconstantτ that data-signal out rises to storage voltage is smaller, i.e., operational amplifier 11 corresponding with the first register is defeated
Data-signal (i.e. the data-signal of the second current value) out to the charge rate of storage capacitance be greater than not with the first register pair
The data-signal (i.e. the data-signal of the first current value) that the operational amplifier 11 answered is exported is to the charge rate of storage capacitance.
To make to export number to the biggish data line 22 of load when the load of the only segment data line 22 in display panel 2 is larger
It is believed that number operational amplifier 11 answered with the first register pair, the pixel unit 21 connecting with the data line 22 can be made to limit
Charging time in charging saturation, and make to loading the operational amplifiers 11 of lesser 22 outputting data signals of data line not with the
One register pair, the pixel unit 21 so as to connect the different loads in display panel 2 can charge saturation, into
And avoid loading because of segment data line 22 it is larger, to pixel unit 21 charge it is insufficient and cause display panel 2 display when go out
Existing concealed wire.
Certainly, above description only indicate the data-signal of operational amplifier 11 corresponding with the first register electric current (or
Person says the thrust of operational amplifier 11) it can change, and the voltage value of its data-signal and constant, i.e., after charging normal, pixel
The brightness of unit 21 will not change.
It answers, is also possible to single with first register pair it is understood that can be multiple operational amplifiers 11
Operational amplifier 11 is answered with single first register pair, can be specifically arranged according to actual needs, herein with no restrictions.Meanwhile
Adjustment data in first register can be adjusted according to actual needs, such as be adjusted according to the load of data line 22
Section, to meet the charge requirement of pixel unit 21.
Preferably, operational amplifier 11 not corresponding with the first register has the first current channels；With the first register
Corresponding operational amplifier 11 have the second current channels, the width of the second current channels and its corresponding to the first register in
Adjustment data it is corresponding, and the width of the second current channels be greater than the first current channels width.
The current maxima for the data-signal that operational amplifier 11 is exported is related to its bias current channel width, biasing
Current channels are wider, then the maximum current output valve that the operational amplifier 11 allows is bigger.Allow in bias current channel width
In the case where, the thrust of operational amplifier 11 is bigger, then the current value of its output is bigger.Since the second current value is greater than the first electricity
Flow valuve, therefore it is preferred that bias current channel (the second current channels) width of operational amplifier 11 corresponding with the first register is greater than
The bias current channel (the first current channels) of operational amplifier 11 not corresponding with the first register, to guarantee to post with first
For the corresponding operational amplifier 11 of storage in outputting data signals, the current value of data-signal will not be because of the limit of bias current channel
It makes and is unable to reach current value size corresponding with adjustment data.
Preferably, the first register has multiple, and the adjustment data stored at least partly the first register are different.
Different adjustment data are stored by multiple first registers, make operational amplifier 11 corresponding with the first register
The data-signal of different current values is exported respectively, in the data line 22 so as to control the display panel different loads in 2 respectively
Storage capacitance charge rate.
It is further preferred that driving chip 1 further include: the second register is used for storage address data；Corresponding unit is used
In operational amplifier 11 and the first register pair are answered according to address date.
When multiple first register pairs answer multiple operational amplifiers 11, and when non-one-to-one correspondence, the present embodiment preferably passes through
Second register and corresponding unit realize that the first register is corresponding with operational amplifier 11.Corresponding unit is posted by reading second
The address date stored in storage answers operational amplifier 11 and the first register pair.
Preferably, the first register than the second register quantity more than one.
Boundary address when first register that the address date in the second register is corresponding as operational amplifier 11, from
And multiple operational amplifier 11 and n+1 the first register pairs can be answered with n the second registers.
Preferably, multiple operational amplifiers 11 are arranged successively；Multiple first registers are arranged successively；Corresponding unit is specifically used
In: first operational amplifier 11 and first the first register pair are answered；It will operational amplifier 11 corresponding with address date
Successively answered with the first register pair in addition to first the first register；Will not corresponding with address date operational amplifier 11 with
Corresponding same first register of the operational amplifier 11 of arrangement before it.
Operational amplifier 11 and the first register pair are answered by corresponding unit, may be implemented to be stored in the second register
Address date corresponding to operational amplifier 11 be boundary, corresponding with each first register operational amplifier 11 is subjected to area
Domain divides, and by storing different adjustment data in different first registers, the operational amplifier of different zones can be realized
The current value of the data-signal of 11 outputs is different.
For example, it is assumed that including 20 operational amplifiers 11 being arranged successively in driving chip 1, wherein preceding ten operations are put
Big device 11 is answered with the first register pair；The quantity of first register is three；The quantity of second register is two, two second
The address date of registers storage be respectively 4 and 8 (i.e. corresponding unit can identify, with the 4th operational amplifier 11 and
The 8th corresponding data of operational amplifier 11), then corresponding unit can be by reading address above mentioned data, by first to third
Operational amplifier 11 is answered with first the first register pair, the 4th to the 7th operational amplifier 11 and second the first register
It is corresponding, the 8th to the tenth operational amplifier 11 and the first register pair of third are answered.By being deposited respectively to three first
Different adjustment data are stored in device, then can be by the connection of data line 22 in operational amplifier 11 and display panel 2, adjustment is aobvious
Show the data-signal in panel 2 in different data line 22 to the charge rate of storage capacitance.Certainly, since the 11st to 20 is each
Operational amplifier 11 is not answered with the first register pair, therefore is not adjusted with the charge rate of corresponding storage capacitance.
It is understood that operational amplifier 11 and the first register have in arrangement respective address information (such as
Itself serial number code).Corresponding unit can be by reading the address date stored in the second register, the determining and address date
Corresponding operational amplifier 11.
Driving chip 1 provided in this embodiment includes multiple data-signals for generating supply 2 data line 22 of display panel
Operational amplifier 11, first register corresponding with partial arithmetic amplifier 11, for storing adjustment data.Wherein, not with
The data-signal that the corresponding operational amplifier 11 of one register generates has the first current value, operation corresponding with the first register
Amplifier 11 generate data-signal have the second current value, the second current value and its corresponding to the first register in adjustment
Data are corresponding, and the second current value is greater than the first current value.Hence for biggish segment data line 22 is loaded, as long as making it
It is corresponding with the second current value, its charge rate can be accelerated, be fully charged coupled storage capacitance can to storage electricity
Pressure, guarantees the problem of corresponding display brightness will not reduce, avoid the occurrence of concealed wire, effectively promotes the display effect of display panel 2.
Embodiment 2:
As shown in figure 3, the present embodiment provides a kind of display panels 2, comprising: any one driving provided in embodiment 1
Chip 1；Multiple data lines 22, every data line 22 connect multiple pixel units 21, operational amplifier 11 (being not shown in Fig. 3) with
Data line 22 connects one to one.
Wherein, display panel 2 is preferably active matrix organic light emitting diode panel (Active-matrix organic
light emitting diode；AMOLED).
In the present embodiment, each data line 22 is supplied to not by each operational amplifier 11 in the driving chip 1 in embodiment 1
With the data-signal of current value, so that the charge rate of pixel unit 21 is controlled, so that charging of each pixel unit 21 in restriction
Charging saturation in time avoids causing pixel unit 21 that can not show its due display brightness because charging not exclusively.Wherein,
Driving chip 1 please refers to embodiment 1 to the specific control of data-signal, and details are not described herein.
Preferably, pixel unit 21 includes storage capacitance；The data-signal that operational amplifier 11 generates is used for storage electricity
Capacity charge.
In display panel 2, the display brightness of pixel unit 21 and the storage voltage of storage capacitance are related, operational amplifier 11
Data-signal is provided to data line 22, the voltage of data-signal determines the storage voltage of storage capacitance, the current value of data-signal
Determine that storage capacitance reaches the time speed of storage voltage (charging saturation).In the present embodiment, by changing the in driving chip 1
The adjustment data stored in one register can control the charging speed of storage capacitance in the pixel unit 21 that each data line 22 connects
Rate, to guarantee that each storage capacitance can charge saturation.
Preferably, the quantity of the pixel unit 21 of at least two data lines 22 connection is different.
In the present embodiment, the operational amplifier 11 in driving chip 1 provided by embodiment 1 is provided to data line 22
When data-signal, to the current value difference for the data-signal that the data line 22 of the pixel unit 21 of connection different number provides, example
Such as to the biggish offer of the data line 22 biggish data-signal of current value is loaded, to guarantee that it can load larger situation
Charging of the lower completion to pixel unit 21.
It is further preferred that data line 22 is arranged along first direction；In a second direction perpendicular to the first direction, it shows
Size of the panel 2 at least two different locations in a first direction is different.
In the present embodiment, loading difference even if data line 22 can also be such that each charging of pixel unit 21 is saturated, therefore display surface
The shape of plate 2 is not necessarily limited by traditional regular quadrilateral, and can be irregular special-shaped pattern.As shown in figure 3, data line
22 are arranged along first direction (vertical direction in Fig. 3), and second direction (horizontal direction in Fig. 3) is vertical with first direction, show
At different location on showing panel 2 in a second direction, size in a first direction is not identical.Preferably, the display panel 2
For circle as shown in Figure 3.
The present embodiment provides a kind of display panels 2, including any one driving chip 1 provided in embodiment 1；A plurality of number
According to line 22, every data line 22 connects multiple pixel units 21, and operational amplifier 11 connects one to one with data line 22.Aobvious
During the display for showing panel 2, the data-signal in data line 22 charges to the storage capacitance in pixel unit 21, passes through
Change voltage (i.e. the storage voltage of storage capacitance) size of data-signal, i.e., the changeable electric current for flowing through OLED, to realize
Adjustment to OLED display brightness (grayscale), so avoid loading because of segment data line 22 it is larger, storage capacitance charging is not filled
Divide and display panel 2 is caused the problem of concealed wire occur in display, effectively promotes the display effect of display panel 2.Meanwhile this is aobvious
Show that the shape of panel 2 is also more diversified.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (6)
1. a kind of driving chip, including multiple operational amplifiers, for generating the data-signal of supply display panel data line,
It is characterized in that, the driving chip further include:
The first register corresponding with partial arithmetic amplifier, for storing adjustment data；Wherein,
The data-signal that operational amplifier not corresponding with the first register generates has the first current value；
The data-signal that corresponding with the first register operational amplifier generates has the second current value, second current value and
The adjustment data in the first register corresponding to it are corresponding, and second current value is greater than first current value；
First register has adjustment data differences that are multiple, and storing at least partly the first register；
Second register is used for storage address data；
Corresponding unit, for being answered the operational amplifier and first register pair according to the address date；
First register than second register quantity more than one；
Multiple operational amplifiers are arranged successively；
Multiple first registers are arranged successively；
The corresponding unit is specifically used for:
First operational amplifier and first first register pair are answered；
Operational amplifier corresponding with the address date is successively deposited with first in addition to first first register
Device is corresponding；
The operational amplifier not corresponding with the address date and the operational amplifier of arrangement before it is corresponding same
A first register.
2. driving chip according to claim 1, which is characterized in that
Operational amplifier not corresponding with the first register has the first current channels；
Operational amplifier corresponding with the first register has the second current channels, the width of second current channels and its institute
Adjustment data in corresponding first register are corresponding, and the width of second current channels is believed greater than first electric current
The width in road.
3. a kind of display panel characterized by comprising
Driving chip described in any one of claim 1-2；
Multiple data lines, every data line connect multiple pixel units, and the operational amplifier and the data line correspond
Connection.
4. display panel according to claim 3, which is characterized in that
The pixel unit includes storage capacitance；
The data-signal that the operational amplifier generates is used to charge to the storage capacitance.
5. display panel according to claim 3, which is characterized in that
The quantity of the pixel unit of at least two data lines connection is different.
6. display panel according to claim 5, which is characterized in that
The data line is arranged along first direction；
In a second direction perpendicular to the first direction, ruler of the display panel at least two different locations in a first direction
Very little difference.
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111357044B (en) * | 2017-12-14 | 2022-05-17 | 深圳市柔宇科技股份有限公司 | Liquid crystal display panel and driving IC thereof |
| CN112259036B (en) * | 2020-11-06 | 2023-12-22 | 合肥芯颖科技有限公司 | Display panel and electronic equipment |
| CN112467835A (en) * | 2020-11-18 | 2021-03-09 | 合肥芯颖科技有限公司 | Display panel charging method and device and display panel |
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| CN104835472A (en) * | 2015-05-28 | 2015-08-12 | 合肥京东方光电科技有限公司 | Drive chip used for driving display panel, display device and drive control method |
| CN105810174A (en) * | 2016-06-01 | 2016-07-27 | 京东方科技集团股份有限公司 | Source-electrode drive chip, display device and driving method of display device |
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| TW200813930A (en) * | 2006-09-07 | 2008-03-16 | Au Optronics Corp | Display device and method capable of adjusting slew rate |
| CN104575360A (en) * | 2015-02-05 | 2015-04-29 | 合肥京东方光电科技有限公司 | Bias current adjusting circuit as well as bias current adjusting method and operational amplifier circuit |
| CN104835472A (en) * | 2015-05-28 | 2015-08-12 | 合肥京东方光电科技有限公司 | Drive chip used for driving display panel, display device and drive control method |
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