CN108682389A - Pixel circuit and display device - Google Patents
Pixel circuit and display device Download PDFInfo
- Publication number
- CN108682389A CN108682389A CN201810465796.6A CN201810465796A CN108682389A CN 108682389 A CN108682389 A CN 108682389A CN 201810465796 A CN201810465796 A CN 201810465796A CN 108682389 A CN108682389 A CN 108682389A
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- Prior art keywords
- light
- emitting component
- pixel circuit
- electrode
- driving
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention provides a kind of pixel circuits, including the control unit that light-emitting component and the control light-emitting component shine；Wherein, the light-emitting component includes the first light-emitting component and the second light-emitting component；Described control unit includes gating circuit and driving circuit, and one end of the driving circuit is electrically connected with the first electrode of first light-emitting component and the first electrode of second light-emitting component respectively, and the other end is connected in driving power；One end of the gating circuit is electrically connected with the second electrode of first light-emitting component and the second electrode of second light-emitting component respectively, and the other end is connected in the driving power.The pixel circuit of the present invention has higher service life and luminous efficiency；Meanwhile the present invention also provides a kind of display device including above-mentioned pixel circuit, the brightness of the display device is adjustable, and there is longer service life.
Description
Technical field
The present invention relates to a kind of display devices of this kind of pixel circuit of pixel circuit and use, belong to organic light emitting display skill
Art field.
Background technology
Compared with traditional liquid crystal display panel, active matrix organic LED panel (AMOLED) is due to power consumption
It is low, be swift in response, the features such as contrast is high, therefore, obtained the concerns of most of display equipment development quotient.
The core element of AMOLED is Organic Light Emitting Diode, is generally included in AMOLED in the prior art multiple at matrix
The Organic Light Emitting Diode of formula arrangement, these Organic Light Emitting Diodes under the driving of corresponding pixel circuit, are sent out respectively
Light.However, due to having and being provided only with an Organic Light Emitting Diode in each pixel circuit in the prior art,
During AMOLED is performed image display, Organic Light Emitting Diode is constantly in the state of being excited, i.e. luminescence display state, and true
On, Organic Light Emitting Diode is when being chronically at excited state, the organic material easily polarity in Organic Light Emitting Diode, causes
So that the built in field of Organic Light Emitting Diode is enhanced rapidly, shortens the service life of Organic Light Emitting Diode；Meanwhile pixel electricity
The use of independent Organic Light Emitting Diode in road, causes the aperture opening ratio of AMOLED extremely low (generally below 20%) so that organic
The luminous efficiency of light emitting diode substantially reduces, the problem for causing the display brightness of AMOLED low.
In view of this, it is necessory to provide a kind of pixel circuit and display device, to solve the above problems.
Invention content
It is of the invention the purpose of the present invention is to provide a kind of display device of this kind of pixel circuit of pixel circuit and use
Pixel circuit has higher service life and luminous efficiency；Meanwhile the present invention also provides one kind including above-mentioned pixel circuit
Display device, the brightness of the display device is adjustable, and have longer service life.
For achieving the above object, the present invention provides a kind of pixel circuits, including light-emitting component and the control hair
The luminous control unit of optical element；Wherein, the light-emitting component includes the first light-emitting component and the second light-emitting component；The control
Unit includes gating circuit and driving circuit, one end of driving circuit first electrode with first light-emitting component respectively
It is connected in driving power with the first electrode electric connection of second light-emitting component, the other end；The one of the gating circuit
End is electrically connected with the second electrode of first light-emitting component and the second electrode of second light-emitting component respectively, the other end
It is connected in the driving power.
As a further improvement on the present invention, the driving circuit includes switching transistor, driving transistor and capacitance, and
The switching transistor and the driving transistor are N-channel type thin film transistor (TFT).
As a further improvement on the present invention, the grid of the switching transistor is connect with scan signal line, the switch
The source electrode of transistor is connect with data signal line, and the drain electrode of the switching transistor is connect with the transmission end of the capacitance.
As a further improvement on the present invention, the output end of the capacitance and the high level output end of the driving power connect
It connects.
As a further improvement on the present invention, the grid of the driving transistor drain electrode with the switching transistor respectively
It is connected with the transmission end of the capacitance；The source electrode of the driving transistor is connect with the high level output end of the driving power,
The drain electrode of the driving transistor respectively with the first electrode of first light-emitting component and second light-emitting component first
Electrode is electrically connected.
As a further improvement on the present invention, first light-emitting component and second light-emitting component are organic light emission
Diode.
As a further improvement on the present invention, the anode of the anode of first light-emitting component and second light-emitting component
It is electrically connected respectively with the drain electrode of the driving transistor.
As a further improvement on the present invention, one end of gating circuit cathode with first light-emitting component respectively
It is electrically connected with the cathode of second light-emitting component, to control first light-emitting component and the second light-emitting component list
Solely/shine simultaneously；The other end of the gating circuit is connected with the low level output end of the driving power.
For achieving the above object, the present invention provides a kind of display device, the display device includes picture above-mentioned
Plain circuit.
The beneficial effects of the invention are as follows：The pixel circuit of the present invention is by being arranged the first light-emitting component and the second luminous member
Part, and the gating circuit that is separately connected with the first light-emitting component and the second light-emitting component so that in present invention pixel circuit
First light-emitting component and the second light-emitting component can simultaneously/individually shine, on the one hand improve the aperture opening ratio of pixel circuit so that as
The luminous efficiency of plain circuit is improved；On the other hand, the service life of pixel circuit is improved.Meanwhile using the present invention's
Display device made of pixel circuit has longer service life, and brightness is adjustable.
Description of the drawings
Fig. 1 is the circuit structure block diagram of present invention pixel circuit.
Fig. 2 is the circuit structure diagram of one preferred embodiment of present invention pixel circuit.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, right in the following with reference to the drawings and specific embodiments
The present invention is described in detail.
Refering to Figure 1, present invention is disclosed a kind of pixel circuit 100, the pixel circuit 100 includes that control is single
Member 1 and light-emitting component 2, each pixel circuit 100 are both connected in the driving power for providing driving current, and each described
Pixel circuit 100 is respectively connected with scan signal line SCAN and data signal line DATA.
Described control unit 1 is equipped with driving circuit 11 and gating circuit 12, and the light-emitting component 2 includes the first light-emitting component
21 and second light-emitting component 22.Further, one end of the driving circuit 11 respectively with first light-emitting component 21
The first electrode of one electrode and second light-emitting component 22 is electrically connected, and the other end is connected in driving power；The gating
One end of circuit 12 second electrode with the second electrode of first light-emitting component 21 and second light-emitting component 22 respectively
It is electrically connected, the other end is connected in the driving power.
It please refers to and is a preferred embodiment of the present invention structural schematic diagram shown in Fig. 2, it is in an embodiment of the present invention, described
Driving circuit 11 includes switching transistor 111, driving transistor 112 and capacitance 113, and the switching transistor 111 and described
Driving transistor 112 is N-channel type thin film transistor (TFT).Further, in the present embodiment, 21 He of the first light-emitting component
Second light-emitting component 22 is Organic Light Emitting Diode, i.e., described first light-emitting component 21 and second light-emitting component 21
First electrode be Organic Light Emitting Diode anode, the of first light-emitting component 21 and second light-emitting component 22
Two electrodes are the cathode of the Organic Light Emitting Diode.
In the present embodiment, the grid of the switching transistor 111 is connect with scan signal line SCAN, the switch crystal
The source electrode of pipe 111 is connect with data signal line DATA, the transmission end of the drain electrode and the capacitance 113 of the switching transistor 111
Connection.So set, the scan signal line SCAN can provide scanning signal on or off to the switching transistor 111
Switching transistor 111；The data signal line DATA can be write by the switching transistor 111 into the pixel circuit 100
Enter data voltage signal, further, data voltage signal is transferred in capacitance 113 and deposits by the switching transistor 111
Storage.
The grid of the driving transistor 112 and the drain electrode of the switching transistor 111 and the transmission of the capacitance 133
End connection；The high level output end V of the source electrode of the driving transistor 112 and the driving powerDDConnection, the driving crystal
The drain electrode of pipe 112 is connect with the anode of first light-emitting component 21 and second light-emitting component 22 respectively.Specifically, institute
Driving transistor 112 is stated by receiving the data voltage and be stored in the capacitance 113 that the switching transistor 111 is transmitted
Voltage is stored to be switched on or end.
The transmission end of the capacitance 113 and the drain electrode of the switching transistor 111, the grid of driving transistor 112 are electrical
Connection, the output end of the capacitance 113 are connected to the low level output end V of the driving powerSS。
In the present embodiment, the gating circuit 12 is switching gate circuit, i.e., described first light-emitting component 21 and described
The unlatching of second light-emitting component 22 can be adjusted by switch.Specifically, the first switch K1 shines with described first
The cathode of element 21 is electrically connected；The cathode of the second switch K2 and second light-emitting component 22 are electrically connected；So set
It sets, first light-emitting component 21 can be controlled respectively by the folding of the control first switch K1 and the second switch K2
With the on or off of second light-emitting component, 22 place circuit, first light-emitting component 21 and described second are then controlled
Light-emitting component 22 is independent/luminous simultaneously.The other end of the first switch K1 and the second switch K2 are both connected to the drive
The low level output end V of dynamic power supplySSOn, so where first light-emitting component 21 and second light-emitting component 22
Circuit forms access.
It should be noted that in other embodiments, the gating circuit 12 can also be light-operated gating circuit, and the light
Controlling gating circuit on the one hand can be to the brightness of first light-emitting component 21, the brightness of second light-emitting component 22 and the picture
The ambient brightness of 100 using area of plain circuit is detected；On the other hand, first threshold and second threshold can be set, with to institute
The light emission luminance and ambient brightness for stating light-emitting component 2 are monitored.Specifically, the first threshold is for monitoring normal environment
Under brightness, the display brightness of the display brightness of first light-emitting component 21 and second light-emitting component 22；I.e. in normal shape
Under state, first light-emitting component 21 individually shines, and during each frame pixel image is shown, is in respective pixel
Light-emitting component 2 in circuit 100 is first light-emitting component 21, and first light-emitting component 21 is shining for a long time
Afterwards, brightness can gradually decay, when first light-emitting component 21 decays to the detectable first threshold of light-operated gating circuit
Afterwards, the light-operated gating circuit controls the closing of the first light-emitting component 21, second light-emitting component 22 is started to work, at this time
Light-emitting component 2 in the pixel circuit 100 is second light-emitting component 22.
When the brightness of second light-emitting component 22 also decays to detectable first setting value of the light-operated gating circuit
When, the light-operated gating circuit controls first light-emitting component 21 and second light-emitting component 22 and shines simultaneously, to meet
The pixel circuit 100 uses brightness, while also improving the aperture opening ratio of the pixel circuit 100, reaches and promotes pixel electricity
The purpose of the luminous efficiency on road 100.Certainly in other embodiments, first light-emitting component 21 and second light-emitting component
22 job order can modify according to actual conditions, in this not with limitation.
Further, the light-operated gating circuit can also carry out the ambient brightness of 100 using area of the pixel circuit
Detection, specifically, when ambient brightness is less than second setting value, i.e., under normal environment brightness, independent light-emitting component 2
(the first light-emitting component 21, the second light-emitting component 22) luminous brightness can meet requirement；When the ambient brightness is higher than
When the second setting value, the luminous brightness of independent light-emitting component 2 (the first light-emitting component 21, the second light-emitting component 22) cannot be satisfied
Requirement, the light-operated gating circuit described at this time control first light-emitting component 21, the second light-emitting component 22 and shine simultaneously, with
Achieve the purpose that the brightness for promoting the pixel circuit 100, is further ensured that and is filled using the display of the pixel circuit 100 of the present invention
The image set is shown clearly.
It is to be appreciated that the description in description of the invention part to the gating circuit 12, exemplary only, i.e.,
The gating circuit 12 can also can be used for controlling first light-emitting component 21 and second light-emitting component to be other kinds of
22 simultaneously/independent luminous circuit types, the concrete structure and type of the gating circuit 12, in this not with limitation.
In conclusion the pixel circuit 100 of the present invention is by being arranged 21 and second light-emitting component of the first light-emitting component
22, and the gating circuit 12 that is separately connected with first light-emitting component 21 and second light-emitting component 22 so that
The first light-emitting component 21 and the second light-emitting component 22 in pixel circuit 100 of the present invention can simultaneously/individually luminous, sides
Face improves the aperture opening ratio of the pixel circuit 100 so that the luminous efficiency of the pixel circuit 100 improves；On the other hand, lead to
It crosses first light-emitting component 21, the second light-emitting component 22 alternately and uses simultaneously, improve 100 entirety of the pixel circuit
Service life.
The present invention also provides a kind of display devices including the pixel circuit 100, since the display device uses
Pixel circuit 100 there is larger aperture opening ratio and service life, while the brightness of the pixel circuit 100 can be by described
Gating circuit 12 is adjusted, and therefore, the service life of the display device is also accordingly extended, the display device it is bright
Degree can also be adjusted so that display device of the invention has stronger practicability and reliability.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to preferred embodiment to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that, it can modify to technical scheme of the present invention
Or equivalent replacement, without departing from the spirit of the technical scheme of the invention and range.
Claims (9)
1. a kind of pixel circuit, including light-emitting component and control the luminous control unit of the light-emitting component；It is characterized in that：Institute
It includes the first light-emitting component and the second light-emitting component to state light-emitting component；Described control unit includes gating circuit and driving circuit,
One end of the driving circuit is electric with the first of the first electrode of first light-emitting component and second light-emitting component respectively
Pole is electrically connected, the other end is connected in driving power；One end of the gating circuit respectively with first light-emitting component
Second electrode and the second electrode of second light-emitting component are electrically connected, the other end is connected in the driving power.
2. pixel circuit according to claim 1, it is characterised in that：The driving circuit includes switching transistor, driving
Transistor and capacitance, and the switching transistor and the driving transistor are N-channel type thin film transistor (TFT).
3. pixel circuit according to claim 2, it is characterised in that：The grid and scan signal line of the switching transistor
Connection, the source electrode of the switching transistor are connect with data signal line, the biography of the drain electrode and the capacitance of the switching transistor
Defeated end connection.
4. pixel circuit according to claim 3, it is characterised in that：The output end of the capacitance and the driving power
High level output end connects.
5. pixel circuit according to claim 4, it is characterised in that：The grid of the driving transistor is opened with described respectively
The drain electrode for closing transistor is connected with the transmission end of the capacitance；The height electricity of the source electrode of the driving transistor and the driving power
Flat output end connection, the drain electrode of the driving transistor are sent out with the first electrode of first light-emitting component and described second respectively
The first electrode of optical element is electrically connected.
6. pixel circuit according to claim 5, it is characterised in that：First light-emitting component and the second luminous member
Part is Organic Light Emitting Diode.
7. pixel circuit according to claim 6, it is characterised in that：The anode of first light-emitting component and described second
The anode of light-emitting component is electrically connected with the drain electrode of the driving transistor respectively.
8. pixel circuit according to claim 7, it is characterised in that：One end of the gating circuit is respectively with described first
The cathode of the cathode of light-emitting component and second light-emitting component is electrically connected, to control first light-emitting component and described the
Two light emitting is independent/luminous simultaneously；The other end of the gating circuit is connected with the low level output end of the driving power.
9. a kind of display device, it is characterised in that：The display device includes claim 1~8 any one of them pixel electricity
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465796.6A CN108682389A (en) | 2018-05-16 | 2018-05-16 | Pixel circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810465796.6A CN108682389A (en) | 2018-05-16 | 2018-05-16 | Pixel circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108682389A true CN108682389A (en) | 2018-10-19 |
Family
ID=63806676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810465796.6A Pending CN108682389A (en) | 2018-05-16 | 2018-05-16 | Pixel circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108682389A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111091780A (en) * | 2019-01-31 | 2020-05-01 | 友达光电股份有限公司 | Pixel circuit and repairing method thereof |
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| US20120006978A1 (en) * | 2010-07-09 | 2012-01-12 | Avistar Communications Corporation | Led/oled array approach to integrated display, lensless-camera, and touch-screen user interface devices and associated processors |
| CN203444736U (en) * | 2013-06-25 | 2014-02-19 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN104658482A (en) * | 2015-03-16 | 2015-05-27 | 深圳市华星光电技术有限公司 | AMOLED (Active Matrix Organic Light Emitting Display) pixel driving circuit and method |
| CN105679244A (en) * | 2016-03-17 | 2016-06-15 | 深圳市华星光电技术有限公司 | AMOLED pixel driving circuit and pixel driving circuit |
| CN106991967A (en) * | 2017-05-27 | 2017-07-28 | 深圳市华星光电技术有限公司 | Pixel-driving circuit and its restorative procedure and display device |
-
2018
- 2018-05-16 CN CN201810465796.6A patent/CN108682389A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120006978A1 (en) * | 2010-07-09 | 2012-01-12 | Avistar Communications Corporation | Led/oled array approach to integrated display, lensless-camera, and touch-screen user interface devices and associated processors |
| CN203444736U (en) * | 2013-06-25 | 2014-02-19 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN104658482A (en) * | 2015-03-16 | 2015-05-27 | 深圳市华星光电技术有限公司 | AMOLED (Active Matrix Organic Light Emitting Display) pixel driving circuit and method |
| CN105679244A (en) * | 2016-03-17 | 2016-06-15 | 深圳市华星光电技术有限公司 | AMOLED pixel driving circuit and pixel driving circuit |
| CN106991967A (en) * | 2017-05-27 | 2017-07-28 | 深圳市华星光电技术有限公司 | Pixel-driving circuit and its restorative procedure and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111091780A (en) * | 2019-01-31 | 2020-05-01 | 友达光电股份有限公司 | Pixel circuit and repairing method thereof |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190529 Address after: 215300 Room No. 188 Chenfeng Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Applicant after: Kunshan Mengxian Electronic Technology Co., Ltd. Address before: Room D1-7179, 58 Fumin Branch, Hengsha Township, Chongming District, Shanghai, 202150 (Shanghai Hengtai Economic Development Zone) Applicant before: Shanghai Han Li Electronic Technology Co. Ltd. |
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Application publication date: 20181019 |
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