CN103236238B - Pixel unit control circuit and display device - Google Patents
Pixel unit control circuit and display device Download PDFInfo
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- CN103236238B CN103236238B CN201310150750.2A CN201310150750A CN103236238B CN 103236238 B CN103236238 B CN 103236238B CN 201310150750 A CN201310150750 A CN 201310150750A CN 103236238 B CN103236238 B CN 103236238B
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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]
-
- 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
- G09G3/3233—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 current through the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention discloses a pixel unit control circuit and a display device provided with the pixel unit control circuit, belongs to the technical field of display, and solves the technical problem in the prior art that as Vth of the driving switch tube in each pixel unit is different, the display effect of the whole image is influenced. The pixel unit control circuit comprises a data input end, a power supply input end and a display control unit, wherein the display control unit comprises a driving switch tube, a reset module, a charging module and a switch module; the reset module is used for resetting the grid voltage of the driving switch tube; the charging module is used for supplementing an offset voltage for the grid of the driving switch tube, and the value of the offset voltage is equal to the difference between the electrical potential of the data input end and the threshold voltage of the driving switch tube; and the switch module is used for conducting the source electrode of the driving switch tube with the power supply input end and conducting the drain electrode of the driving switch tube with the organic light emitting diode. The pixel unit control circuit and the display device are applied to AMOLED (Active Matrix Organic Light Emitting Diode).
Description
Technical field
The invention belongs to display technique field, be specifically related to a kind of pixel unit control circuit and be provided with the display device of this pixel unit control circuit.
Background technology
Active matrix organic LED panel (Active Matrix Organic Light Emitting Diode, be called for short AMOLED) there is the advantages such as energy consumption is low, production cost is low, visual angle is wide, fast response time, therefore AMOLED replaces traditional liquid crystal display gradually.Organic Light Emitting Diode (OLED) belongs to electric current and drives, and its principle of work is that electronics and hole combine and produce radiant light, is directly namely luminous energy electric energy conversion, so need stable electric current to control luminescence during display.
Current OLED is driven by a driving switch pipe DT, the switching tube of DT normally P type.The grid connection data input end V of DT
data, source electrode connects the power input V of constant voltage
dd, drain electrode connects OLED.By the V of source electrode
ddwith the V of grid
databetween produce voltage difference V
gS, thus the OLED conducting that DT is drained, the electric current I of OLED
oLED=K (V
gS-V
th)
2, wherein V
thfor the threshold voltage of DT itself, K is a constant.
The present inventor is realizing finding in process of the present invention, and prior art at least exists following problem: due to the reason such as error, device aging of manufacturing process, can make the V of DT in each pixel cell
thdifferent, therefore deviation is in various degree caused to the electric current in each OLED, affect the display effect of whole image.
Summary of the invention
Embodiments provide a kind of pixel unit control circuit and be provided with the display device of this pixel unit control circuit, solve the V of driving switch pipe in each pixel cell in prior art
thdifferent, and affect the technical matters of the display effect of whole image.
For achieving the above object, embodiments of the invention adopt following technical scheme:
The invention provides a kind of pixel unit control circuit, comprise data input pin, power input and indicative control unit, described indicative control unit comprises driving switch pipe, reseting module, charging module and switch module;
Described reseting module is used for the grid voltage of described driving switch pipe to reset;
Described charging module is used for after the grid voltage of described driving switch pipe resets, and for the grid of described driving switch pipe is filled with bucking voltage, the value of described bucking voltage equals the difference of the electromotive force of described data input pin and the threshold voltage of described driving switch pipe;
Described switch module is used for after the grid of described driving switch pipe is filled with bucking voltage, makes the source electrode of described driving switch pipe and described power input conducting, drain electrode and Organic Light Emitting Diode conducting.
Preferably, described reseting module comprises reset signal input end and the first switching tube;
The grid of described driving switch pipe is by described first switching tube ground connection;
Described reset signal input end is connected to the grid of described first switching tube.
Preferably, described charging module comprises charging signal input terminal, second switch pipe, the 3rd switching tube and the first electric capacity;
The two ends of described second switch pipe are connected to the source electrode of described data input pin and described driving switch pipe respectively;
The two ends of described 3rd switching tube are connected to grid and the drain electrode of described driving switch pipe respectively;
The first end of described first electric capacity is connected to the grid of described driving switch pipe, the second end ground connection;
Described charging signal input terminal is connected to the grid of described second switch pipe and the grid of described 3rd switching tube.
Preferably, described switch element comprises switch signal input end, the 4th switching tube and the 5th switching tube;
The two ends of described 4th switching tube are connected to the source electrode of described power input and described driving switch pipe respectively;
The two ends of described 5th switching tube are connected to the drain electrode of described driving switch pipe and described Organic Light Emitting Diode respectively;
Described switch signal input end is connected to the grid of described 4th switching tube and the grid of described 5th switching tube.
Further, this pixel unit control circuit, also comprises touch control unit, and described touch control unit comprises the second electric capacity, coupled signal input end, resets module and acquisition module;
Described coupled signal input end is connected to the first end of described second electric capacity;
Described replacement module is used for the second end input reset voltage for described second electric capacity;
Described acquisition module is used for, after the second end input reset voltage of described second electric capacity, gathering the touch signal produced by the change in voltage of described second electric capacity.
Preferably, described replacement module comprises reset signal input end and the 6th switching tube;
The two ends of described 6th switching tube are connected to the second end of described second electric capacity and described data input pin respectively;
Described reset signal input end is connected to the grid of described 6th switching tube.
Preferably, described acquisition module comprises first direction sweep signal input end, second direction sweep signal input end, the 7th switching tube and the 8th switching tube;
Described 7th switching tube and described 8th switching tube are connected between described coupled signal input end and described second direction sweep signal input end;
The grid of described 7th switching tube is connected to the second end of described second electric capacity;
The grid of described 8th switching tube is connected to described first direction sweep signal input end.
Preferably, described driving switch pipe is P-type TFT (Thin Film Transistor is called for short TFT).
The present invention also provides a kind of display device, comprises above-mentioned pixel unit control circuit.
Compared with prior art, technique scheme tool provided by the present invention has the following advantages: after the grid voltage of driving switch pipe resets by reseting module, the grid being driving switch pipe by charging module is filled with bucking voltage, and the value of this bucking voltage equals V
data-V
th, then by switch module by the source electrode of driving switch pipe and power input conducting, drain electrode and OLED conducting.Now, the voltage difference V between the source electrode of driving switch pipe and grid
gSfor V
dd-(V
data-V
th)=V
dd-V
data+ V
th, so the electric current I that OLED inside produces
oLED=K (V
gS-V
th)
2=K (V
dd-V
data+ V
th-V
th)
2=K (V
dd-V
data)
2.Therefore, technical scheme provided by the invention makes I
oLEDnot by V
thimpact, and only and V
datarelevant, thus solve the V because of driving switch pipe in each pixel cell
thdifferent, and affect the technical matters of the display effect of whole image.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described.
The schematic diagram of the pixel unit control circuit that Fig. 1 provides for embodiments of the invention 1;
Another schematic diagram of the pixel unit control circuit that Fig. 2 provides for embodiments of the invention 1;
The signal timing diagram of the pixel unit control circuit that Fig. 3 provides for embodiments of the invention 1;
The schematic diagram of the pixel unit control circuit that Fig. 4 provides for embodiments of the invention 2;
Another schematic diagram of the pixel unit control circuit that Fig. 5 provides for embodiments of the invention 2;
The clock signal figure of the pixel unit control circuit that Fig. 6 provides for embodiments of the invention 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiment 1:
As shown in Figure 1, the pixel unit control circuit that the embodiment of the present invention provides can be applicable in AMOLED, and this pixel unit control circuit comprises data input pin V
data, power input V
ddand indicative control unit, indicative control unit comprises driving switch pipe DT, reseting module, charging module and switch module.
Reseting module is used for the grid voltage of DT to reset.Charging module is used for after the grid voltage of DT resets, and for the grid of DT is filled with bucking voltage, the value of bucking voltage equals data input pin V
dataelectromotive force and the threshold voltage V of DT
thdifference, i.e. V
data-V
th.Switch module is used for after the grid of DT is filled with bucking voltage, makes source electrode and the power input conducting of DT, drain electrode simultaneously and OLED conducting.
After the grid voltage of driving switch pipe resets by reseting module, the grid being driving switch pipe by charging module is filled with bucking voltage, and the value of this bucking voltage equals V
data-V
th, then by switch module by the source electrode of driving switch pipe and power input conducting, drain electrode and OLED conducting.Now, the voltage difference V between the source electrode of driving switch pipe and grid
gSfor V
dd-(V
data-V
th)=V
dd-V
data+ V
th, so the electric current I that OLED inside produces
oLED=K (V
gS-V
th)
2=K (V
dd-V
data+ V
th-V
th)
2=K (V
dd-V
data)
2.Therefore, technical scheme provided by the invention makes I
oLEDnot by V
thimpact, and only and V
datarelevant, thus solve the V because of driving switch pipe in each pixel cell
thdifferent, and affect the technical matters of the display effect of whole image.
Fig. 2 is the circuit diagram preferred embodiment of modules in the embodiment of the present invention.
As shown in Figure 2, reseting module comprises reset signal input end and the first switch transistor T 1.The grid of DT is by T1 ground connection; Reset signal input end is connected to the grid of T1.
Charging module comprises charging signal input terminal, second switch pipe T2, the 3rd switch transistor T 3 and the first electric capacity C1.The two ends of T2 are connected to V respectively
datawith the source electrode of DT; The two ends of T3 are connected to grid and the drain electrode of DT respectively; The first end of C1 is connected to the grid of DT, the second end ground connection; Charging signal input terminal is connected to the grid of T2 and the grid of T3.
Preferably, switch element comprises switch signal input end, the 4th switch transistor T 4 and the 5th switch transistor T 5.The two ends of T4 are connected to V respectively
ddwith the source electrode of DT; The two ends of T5 are connected to drain electrode and the OLED of DT respectively; Switch signal input end is connected to the grid of T4 and the grid of T5.
As a preferred version, the DT in the present embodiment, and T1, T2, T3, T4, T5 are P type TFT.The principle of work of P type TFT is low level conducting, convenient control; Low-temperature polysilicon silicon technology (Low Temperature Poly-silicon is called for short LTPS) can be adopted in the fabrication process, thus simplify its manufacture craft.Certainly, all or part of switching tube above-mentioned in the present embodiment also can replace with N-type TFT, only need change corresponding control signal.
The signal timing diagram of the course of work of this pixel unit control circuit as shown in Figure 3.
In first time period t1, reset signal input end is low level, makes T1 conducting, and T2, T3, T4, T5 disconnect.Now, the grid of DT just can pass through T1 ground connection, thus makes the voltage of the grid of DT reduce to 0V.
In the second time period t 2, charging signal input terminal is low level, makes T2, T3 conducting, and T1, T4, T5 disconnect.V
dataelectric signal can arrive the first end of C1 by T2, DT, T3 successively, and be the grid of C1(DT) charge.Because the condition of DT conducting is V
gS> V
th, and the voltage of DT source electrode is V
data, so when the grid voltage of DT rises to V
data-V
thtime, the V of DT
gSv will be reduced to
th, now DT will turn off, and stops the gate charges to DT, and the grid voltage of DT will remain on V
data-V
th.
In the 3rd time period t 3, switch element is low level, makes T4, T5 conducting, and T1, T2, T3 disconnect.Now, DT source electrode and V
ddconducting, drain electrode and OLED conducting, then the voltage difference V between the source electrode of DT and grid
gS=V
dd-(V
data-V
th)=V
dd-V
data+ V
th, so the electric current I that OLED inside produces
oLED=K (V
gS-V
th)
2=K (V
dd-V
data+ V
th-V
th)
2=K (V
dd-V
data)
2.Therefore, in the pixel unit control circuit that the embodiment of the present invention provides, I
oLEDnot by V
thimpact, and only and V
datarelevant, thus solve the V because of DT in each pixel cell
thdifferent, and affect the technical matters of the display effect of whole image.
Embodiment 2:
The present embodiment is substantially the same manner as Example 1, and improves on the basis of embodiment 1, as shown in Figure 4, also comprises touch control unit in the present embodiment.Touch control unit and aforesaid indicative control unit can carry out work simultaneously, do not interfere with each other, and some element and input signal are public, are below described in detail.
Touch control unit comprises the second electric capacity C2, coupled signal input end, resets module and acquisition module.Coupled signal input end is connected to the first end of C2.Reset module to be used for for second end (touch-control sensing end) of C2 inputs reset voltage.Acquisition module is used for, after the second end input reset voltage of C2, gathering the touch signal produced by the change in voltage of C2.
Fig. 5 is the circuit diagram preferred embodiment of modules in the embodiment of the present invention.
As shown in Figure 5, reset module and comprise reset signal input end and the 6th switch transistor T 6.The two ends of T6 are connected to the second end and the V of C2 respectively
data; Reset signal input end is connected to the grid of T6.In the embodiment of the present invention, reset signal input end can be same input end with reset signal input end.
Acquisition module comprises first direction sweep signal input end and second direction sweep signal input end, namely X-direction (transverse direction) sweep signal input end and Y-direction (longitudinal direction) sweep signal input end.Certainly, in other embodiments, also can using second direction sweep signal input end as X-direction sweep signal input end, using first direction sweep signal input end as Y-direction sweep signal input end.In the embodiment of the present invention, X-direction sweep signal input end can be same input end with charging signal input terminal.
Acquisition module also comprises the 7th switch transistor T 7 and the 8th switch transistor T 8.T7 and T8 is connected between coupled signal input end and Y-direction sweep signal input end; The grid of T7 is connected to second end of C2; The grid of T8 is connected to X-direction sweep signal input end.
Preferably, T6, T7, T8 in the present embodiment are also P type TFT.Certainly, all or part of switching tube wherein also can replace with N-type TFT.
Indicative control unit in the pixel unit control circuit that the present embodiment provides and touch control unit can carry out work simultaneously, and do not interfere with each other, and the signal timing diagram of its course of work as shown in Figure 6.
In first time period t1, reset signal input end (reset signal input end) is low level, makes T6 conducting, and T7, T8 disconnect.Now, by V
datareset signal is provided, for second end (namely touch-control sensing end) of C2 charges, makes the voltage of touch-control sensing end be V
data.
In the second time period t 2, X-direction sweep signal input end (charging signal input terminal) is low level, makes T8 conducting, and T6 disconnects, and coupled signal input end is high level simultaneously.Now, coupled signal input end, on the one hand for the first end of C2 provides voltage, forms coupling capacitance; Also serve as the source electrode amplifying T7 on the other hand.
The touch of finger can directly cause the voltage of second end of C2 to reduce, namely the voltage of T7 grid reduces, make T7 conducting, electric signal on such coupled signal input end will arrive the source electrode of T8 by T7, and gathered by Y-direction sweep signal input end by T8, to determine finger touch position coordinate in the Y direction.Then, collect the time of this touching signals according to Y-direction sweep signal input end, just can determine this touch location coordinate in the X direction.In addition, T7 also has amplification, amplifies, the electric signal on coupled signal input end so that Y-direction sweep signal is to the collection of this signal.
In the 3rd time period t 3, all devices of touch control unit are all in closed condition, and are also just now the glow phase of OLED, so touch control unit can not impact the luminescence of OLED.
Therefore, the pixel unit control circuit that the embodiment of the present invention provides, while achieving OLED control, also achieve embedded touch control (in cell touch), and indicative control unit and touch control unit can not influence each other.
It should be noted that the embodiment of the pixel unit control circuit in the above embodiment of the present invention is only most preferred embodiment, certainly can also adopt other embodiment.Such as, the reseting module in indicative control unit, and supplement module with money in touch control unit, all can replace with the circuit module with voltage amplitude or function of reset that other are common.And for example, in the sampling module of embodiment 2, the series sequence of T7 and T8 also can be exchanged, etc.
Embodiment 3:
The present invention also provides a kind of display device, and can be specifically any product or parts with Presentation Function such as televisor, display, digital album (digital photo frame), mobile phone, panel computer, this display device comprises the pixel unit control circuit in above-described embodiment.
The display device provided due to the embodiment of the present invention has identical technical characteristic with the pixel unit control circuit that the invention described above embodiment provides, so also can produce identical technique effect, solves identical technical matters.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. a pixel unit control circuit, is characterized in that: comprise data input pin, power input and indicative control unit, and described indicative control unit comprises driving switch pipe, reseting module, charging module and switch module;
Described reseting module is used for the grid voltage of described driving switch pipe to reset, described reseting module comprises reset signal input end and the first switching tube, the grid of described driving switch pipe is by described first switching tube ground connection, and described reset signal input end is connected to the grid of described first switching tube;
Described charging module is used for after the grid voltage of described driving switch pipe resets, for the grid of described driving switch pipe is filled with bucking voltage, the value of described bucking voltage equals the difference of the electromotive force of described data input pin and the threshold voltage of described driving switch pipe, and described charging module comprises charging signal input terminal, second switch pipe, the 3rd switching tube and the first electric capacity;
Described switch module is used for after the grid of described driving switch pipe is filled with bucking voltage, makes the source electrode of described driving switch pipe and described power input conducting, drain electrode and Organic Light Emitting Diode conducting.
2. pixel unit control circuit according to claim 1, is characterized in that: the two ends of described second switch pipe are connected to the source electrode of described data input pin and described driving switch pipe respectively;
The two ends of described 3rd switching tube are connected to grid and the drain electrode of described driving switch pipe respectively;
The first end of described first electric capacity is connected to the grid of described driving switch pipe, the second end ground connection;
Described charging signal input terminal is connected to the grid of described second switch pipe and the grid of described 3rd switching tube.
3. pixel unit control circuit according to claim 1, is characterized in that: described switch element comprises switch signal input end, the 4th switching tube and the 5th switching tube;
The two ends of described 4th switching tube are connected to the source electrode of described power input and described driving switch pipe respectively;
The two ends of described 5th switching tube are connected to the drain electrode of described driving switch pipe and described Organic Light Emitting Diode respectively;
Described switch signal input end is connected to the grid of described 4th switching tube and the grid of described 5th switching tube.
4. pixel unit control circuit according to claim 1, is characterized in that: also comprise touch control unit, and described touch control unit comprises the second electric capacity, coupled signal input end, resets module and acquisition module;
Described coupled signal input end is connected to the first end of described second electric capacity;
Described replacement module is used for the second end input reset voltage for described second electric capacity;
Described acquisition module is used for, after the second end input reset voltage of described second electric capacity, gathering the touch signal produced by the change in voltage of described second electric capacity.
5. pixel unit control circuit according to claim 4, is characterized in that: described replacement module comprises reset signal input end and the 6th switching tube;
The two ends of described 6th switching tube are connected to the second end of described second electric capacity and described data input pin respectively;
Described reset signal input end is connected to the grid of described 6th switching tube.
6. pixel unit control circuit according to claim 4, is characterized in that: described acquisition module comprises first direction sweep signal input end, second direction sweep signal input end, the 7th switching tube and the 8th switching tube;
Described 7th switching tube and described 8th switching tube are connected between described coupled signal input end and described second direction sweep signal input end;
The grid of described 7th switching tube is connected to the second end of described second electric capacity;
The grid of described 8th switching tube is connected to described first direction sweep signal input end.
7. pixel unit control circuit according to claim 1, is characterized in that: described driving switch pipe is P-type TFT.
8. a display device, is characterized in that: comprise the pixel unit control circuit described in any one of claim 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310150750.2A CN103236238B (en) | 2013-04-26 | 2013-04-26 | Pixel unit control circuit and display device |
| PCT/CN2013/079079 WO2014173021A1 (en) | 2013-04-26 | 2013-07-09 | Pixel unit control circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310150750.2A CN103236238B (en) | 2013-04-26 | 2013-04-26 | Pixel unit control circuit and display device |
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| CN103236238A CN103236238A (en) | 2013-08-07 |
| CN103236238B true CN103236238B (en) | 2015-07-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103456267B (en) | 2013-08-26 | 2015-12-02 | 北京京东方光电科技有限公司 | Touch-control display driver circuit and driving method thereof and display device |
| CN103971639B (en) | 2014-05-06 | 2016-01-06 | 京东方科技集团股份有限公司 | Pixel-driving circuit and driving method, array base palte and display device |
| CN103985352B (en) * | 2014-05-08 | 2017-03-08 | 京东方科技集团股份有限公司 | Compensation pixel circuit and display device |
| CN104103239B (en) | 2014-06-23 | 2016-05-04 | 京东方科技集团股份有限公司 | Organic light-emitting diode pixel circuit and driving method thereof |
| CN104078006B (en) * | 2014-06-27 | 2016-04-13 | 京东方科技集团股份有限公司 | Image element circuit, display panel and display device |
| CN104091564B (en) | 2014-06-30 | 2016-07-06 | 京东方科技集团股份有限公司 | A kind of image element circuit, organic EL display panel and display device |
| CN104217677B (en) * | 2014-07-30 | 2016-08-24 | 京东方科技集团股份有限公司 | touch display circuit and display device |
| CN104282265B (en) | 2014-09-26 | 2017-02-01 | 京东方科技集团股份有限公司 | Pixel circuit, drive method thereof, an organic light-emitting display panel and display device |
| CN104409047B (en) * | 2014-12-18 | 2017-01-18 | 合肥鑫晟光电科技有限公司 | Pixel driving circuit, pixel driving method and display device |
| CN104680976B (en) * | 2015-02-09 | 2017-02-22 | 京东方科技集团股份有限公司 | Pixel compensation circuit, display device and driving method |
| CN104680981B (en) * | 2015-03-26 | 2017-03-15 | 京东方科技集团股份有限公司 | OLED pixel drive circuit and driving method, OLED display |
| CN104835449B (en) * | 2015-05-04 | 2017-05-17 | 京东方科技集团股份有限公司 | Pixel circuit, pixel circuit driving method, array substrate and display apparatus |
| CN104850270B (en) * | 2015-06-11 | 2017-10-03 | 京东方科技集团股份有限公司 | Driving method, drive circuit, touch module, panel and the device of touch module |
| CN104978931B (en) * | 2015-07-09 | 2017-11-21 | 上海天马有机发光显示技术有限公司 | Load device and method, display panel, the display of data voltage signal |
| CN106340514B (en) * | 2016-11-01 | 2017-10-10 | 京东方科技集团股份有限公司 | A kind of CMOS active pixel sensor, drive circuit and driving method |
| KR102387793B1 (en) * | 2017-09-13 | 2022-04-15 | 엘지디스플레이 주식회사 | Touch sensor integrated type display device and touch sensing method of the same |
| CN109036287B (en) * | 2018-07-19 | 2020-05-05 | 武汉华星光电半导体显示技术有限公司 | Pixel driving circuit, driving method and display panel |
| TWI708230B (en) * | 2018-11-20 | 2020-10-21 | 友達光電股份有限公司 | Display panel |
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| KR100975873B1 (en) * | 2008-12-10 | 2010-08-13 | 삼성모바일디스플레이주식회사 | Touch screen display apparatus and the method for operating the same |
| CN101944323B (en) * | 2009-07-06 | 2013-09-18 | 上海天马微电子有限公司 | Organic light-emitting display device, pixel unit and touch detection method thereof |
| KR101144725B1 (en) * | 2009-11-30 | 2012-05-24 | 이성호 | Touch cell structure of touch panel |
| KR20120065137A (en) * | 2010-12-10 | 2012-06-20 | 삼성모바일디스플레이주식회사 | Pixel, display device and driving method thereof |
| CN103034365B (en) * | 2012-12-13 | 2016-03-09 | 北京京东方光电科技有限公司 | Touch display circuit structure and driving method, array base palte and display device |
| CN103135846B (en) * | 2012-12-18 | 2016-03-30 | 北京京东方光电科技有限公司 | Touch display circuit structure and driving method, array base palte and display device |
| CN103000134A (en) * | 2012-12-21 | 2013-03-27 | 北京京东方光电科技有限公司 | Pixel circuit, driving method of pixel circuit and display device |
| CN202976780U (en) * | 2012-12-21 | 2013-06-05 | 北京京东方光电科技有限公司 | Pixel circuit and display device |
| CN203179480U (en) * | 2013-04-26 | 2013-09-04 | 北京京东方光电科技有限公司 | Pixel unit control circuit and display device |
-
2013
- 2013-04-26 CN CN201310150750.2A patent/CN103236238B/en active Active
- 2013-07-09 WO PCT/CN2013/079079 patent/WO2014173021A1/en active Application Filing
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| Publication number | Publication date |
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| CN103236238A (en) | 2013-08-07 |
| WO2014173021A1 (en) | 2014-10-30 |
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