CN203895093U - Pixel circuit and display device - Google Patents
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- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000004146 energy storage Methods 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 16
- 239000010409 thin film Substances 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 229920001621 AMOLED Polymers 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- 238000005034 decoration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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- 230000003321 amplification Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Abstract
The utility model provides a pixel circuit and a display device. The pixel circuit comprises a pixel compensation module, a light-emitting module and a touch control detection module. According to the pixel circuit and the display device which are provided by the utility model, the pixel compensation module and the touch control detection module are integrated in the pixel circuit, and the pixel compensation module and the touch control detection module share a data voltage line and scanning signal lines. So the number of signal circuits can be reduced, a pixel pitch is greatly reduced, IC cost is also reduced, and thus a higher pixel density is obtained.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a pixel circuit and display device.
Background
With the rapid progress of display technology, display devices with touch control function are gradually gaining popularity due to the advantages of visual operation and the like. According to the relative position between the touch panel and the display panel, the conventional display device with touch function can be generally divided into an on-cell (on cell) touch panel and an in-cell (in cell) touch panel. The in-cell touch panel has a thinner thickness and a higher light transmittance than the surface type touch panel.
For the conventional display device, an Organic Light Emitting Diode (OLED) is used as a current type Light Emitting device, and is increasingly applied to the field of high performance display due to its characteristics of self-luminescence, fast response, wide viewing angle, and being capable of being fabricated on a flexible substrate. The OLED display device can be divided into two types, namely, PMOLED (Passive Matrix Driving OLED) and AMOLED (Active Matrix Driving OLED), according to different Driving modes, and is expected to become a next-generation novel flat panel display replacing LCD (liquid crystal display) because the AMOLED display has advantages of low manufacturing cost, high response speed, power saving, direct current Driving applicable to portable devices, large working temperature range, and the like. Therefore, the AMOLED display panel with the in-cell touch function is gaining favor of more and more people.
In the conventional AMOLED display panel, each OLED is driven to emit light by a driving circuit composed of a plurality of Thin Film Transistor (TFT) switches in a pixel unit on an array substrate, so as to realize display.
In the in-cell Touch Panel (TSP), a sensor and a driving circuit for Touch are fabricated in each pixel unit on an array substrate by an array process. If the sensor and the driving circuit of the TSP are overlapped in the AMOLED pixel, a certain number of driving circuit TFTs need to be added, so that a certain space of a pixel unit needs to be additionally occupied, and the spare space in the pixel unit is limited, so that the simultaneous manufacture of the embedded touch panel circuit and the AMOLED driving circuit is greatly limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a plain circuit and display device can improve embedded touch-control circuit and pixel drive circuit's integrated level.
In order to achieve the above object, the present invention provides a pixel circuit, including: the device comprises a pixel compensation module, a light emitting module and a touch detection module;
the pixel compensation module is respectively connected with the first to fourth scanning signal lines, the first working voltage line, the data voltage line and the light-emitting module and is used for controlling the light-emitting module to perform light-emitting display according to the input of the scanning signal lines;
the touch detection module comprises a detection submodule and an output submodule; the detection submodule is respectively connected with a second scanning signal line, a second working voltage line and a data voltage line and is used for detecting a touch signal; and the output submodule is respectively connected with the third scanning signal line, the touch signal reading line and the detection submodule and is used for outputting a detection touch signal to the touch signal reading line according to the input of the third scanning signal line.
Preferably, the light emitting module includes an electroluminescent element, and the electroluminescent element is connected to the pixel compensation module.
Preferably, the pixel compensation module includes first to sixth switching units, a pixel driving unit and an energy storage unit; wherein,
the first switch unit is connected between the first working voltage line and the input end of the pixel driving unit, and the control end is connected to the fourth scanning signal line;
the second switch unit, the energy storage unit and the fifth switch unit are sequentially cascaded, one end of the cascade circuit is connected to the output end of the pixel driving unit, and the other end of the cascade circuit is grounded; the control ends of the second switch unit and the fifth switch unit are connected with a third scanning signal line;
the third switching unit is connected between the first end of the energy storage unit and the data voltage line; the sixth switching unit is connected between the pixel driving unit and the electroluminescent element; the control ends of the third switch unit and the sixth switch unit are connected to the first scanning signal line;
one end of the fourth switch unit is connected to the second end of the energy storage unit, the other end of the fourth switch unit is grounded, and the control end of the fourth switch unit is connected with the second scanning signal line;
the control end of the pixel driving unit is also connected with the second end of the energy storage unit, and the output end of the pixel driving unit is also connected with the electroluminescent element.
Preferably, the energy storage unit is a capacitor.
Preferably, the output sub-module includes a seventh switch unit, one end of the seventh switch unit is connected to the touch signal reading line, the other end of the seventh switch unit is connected to the detection sub-module, and the control end of the seventh switch unit is connected to the third scanning signal line.
Preferably, the detection submodule includes an eighth switching unit, a touch signal driving unit, a sensing capacitor, and a touch electrode, the eighth switching unit is connected between a control end of the touch signal driving unit and the data voltage line, and the control end is connected to the second scanning signal line; the input end of the touch signal driving unit is connected with the second working voltage line, and the output end of the touch signal driving unit is connected with the seventh switching unit; the sensing capacitor is connected between the input end and the control end of the touch signal driving unit; the touch control electrode is connected with the control end of the touch control signal driving unit.
Preferably, the third scanning signal line connected to the output sub-module is replaced by a first scanning signal line, and the third scanning signal line connected to the control end of the seventh switch unit is replaced by a first scanning signal line.
Preferably, the second scanning signal line connected to the control end of the detection submodule is replaced by a third scanning signal line, and the second scanning signal line connected to the control end of the eighth switch unit is replaced by a third scanning signal line.
Preferably, each of the switching unit and the driving unit is a thin film field effect transistor.
Preferably, each thin film field effect transistor is of a P-channel type; the control end of the driving unit is a grid electrode of the thin film field effect transistor, the input end is a source electrode, and the output end is a drain electrode; the control end of each switch unit is a grid electrode of the thin film field effect transistor, and the other two ends of each switch unit correspond to a source electrode and a drain electrode.
The utility model also provides a display device, its characterized in that, including above-mentioned arbitrary pixel circuit.
The utility model provides a pixel circuit and display device, integrated pixel compensation module and touch-control detection module in pixel circuit to make pixel compensation module and touch-control detection module sharing data voltage line and scanning signal line. This reduces the number of signal lines, thereby greatly reducing the pixel pitch size and reducing IC cost, and achieving higher pixel density.
Drawings
Fig. 1 is a schematic structural diagram of a pixel circuit provided in the present invention;
fig. 2 a-fig. 2c are schematic circuit structure diagrams of the pixel circuit provided by the present invention;
fig. 3 is a timing diagram of key signals in the driving method of the pixel circuit according to the present invention;
fig. 4 a-4 d are schematic diagrams of current flow direction and voltage value of the pixel circuit in different time sequences according to the present invention;
fig. 5 is a schematic diagram of a positional relationship between a pixel circuit and a pixel in a display device according to the present invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The utility model provides a pixel circuit, as shown in fig. 1, 2, include:
the pixel compensation module 100, the light emitting module 200 and the touch detection module 300;
the pixel compensation module 100 is respectively connected to first to fourth Scan signal lines (Scan [1], Scan [2], Scan [3], Em shown in the figure), a first working voltage line Vdd, a data voltage line Vdata, and the light emitting module 200, and is configured to control the light emitting module 200 to perform light emitting display according to an input of the Scan signal line;
the touch detection module 300 comprises a detection submodule and an output submodule; the detection submodule is respectively connected with a second scanning signal line Scan [2], a second working voltage line Vint and a data voltage line Vdata and is used for detecting a touch signal; and an output sub-module respectively connected to the third Scan signal Line Scan [3], the touch signal read Line Y-read Line, and the detection sub-module 310, and configured to output a detection touch signal to the Y-read Line according to an input of the third Scan signal Line Scan [3 ].
The utility model provides a pixel circuit, integrated pixel compensation module and touch-control detection module in pixel circuit to make pixel compensation module and touch-control detection module sharing data line and scanning signal line. This reduces the number of signal lines, thereby greatly reducing the pixel pitch size and reducing IC cost, and achieving higher pixel density.
The second working voltage line Vint here is used to supply the driving pulses.
Specifically, as shown in fig. 2, the light emitting module 200 may include an electroluminescent element L, which is connected to the pixel compensation module 100.
In the present invention, the Light Emitting device L may be a plurality of current driven Light Emitting devices including an LED (Light Emitting Diode) or an OLED (Organic Light Emitting Diode) in the prior art. In the present invention, the OLED is taken as an example for explanation.
Further, as shown in fig. 2, the pixel compensation module 100 specifically includes:
first to sixth switching units (T1, T2 … … T6 shown in fig. 2 in sequence), a pixel driving unit DT1 and an energy storage unit C1, wherein the first switching unit T1 is connected between Vdd and the input end of the pixel driving unit DT1, and the control end is connected to the fourth scanning signal line Em;
the second switch unit T2 is sequentially cascaded with the energy storage unit C1 and the fifth switch unit T5, one end of the cascaded circuit is connected to the output end of the pixel driving unit DT1, and the other end of the cascaded circuit is grounded; the control terminals of the second switch unit T2 and the fifth switch unit T5 are both connected to a third Scan signal line Scan [3 ];
the third switching unit T3 is connected between the data voltage line Vdata and the first end a1 of the energy storage unit C1 and the first operating voltage line Vdd; the sixth switching unit T6 is connected between the pixel driving unit DT1 and the electro-luminescence element L; control terminals of the third switching unit T3 and the sixth switching unit T6 are both connected to the first Scan signal line Scan [1 ];
one end of the fourth switch unit T4 is connected to the second end b of the energy storage unit C1, the other end is grounded, and the control end is connected to the second Scan signal line Scan [2 ];
the control terminal of the pixel driving unit DT1 is further connected to the second terminal b of the energy storing unit C1, and the output terminal is further connected to the electroluminescent element L.
In the preferred embodiment of the present invention, the working current flowing through the electroluminescent unit is not affected by the threshold voltage of the corresponding driving transistor, so that the problem of non-uniform display brightness caused by the drift of the threshold voltage of the driving transistor is solved thoroughly.
Further, the energy storage unit C1 is a capacitor. In practical application, other elements with energy storage function can be adopted according to design requirements.
Further, as shown in fig. 2, the output sub-module includes: one end of the seventh switch unit T7, one end of the seventh switch unit T7 is connected to the touch signal read Line Y-read Line, the other end is connected to the detection sub-module 320, and the control end is connected to the third Scan signal Line Scan [3] (see fig. 2 a).
Further, the detection submodule includes an eighth switching unit T8, a touch signal driving unit DT2, a sensing capacitor C2 and a touch electrode d, the eighth switching unit T8 is connected between a control terminal of the touch signal driving unit DT2 and the data voltage line Vdata, and the control terminal is connected to the second Scan signal line Scan [2 ]; the input end of the touch signal driving unit DT2 is connected to the second working voltage line Vint, and the output end is connected to the seventh switching unit T7; the sensing capacitor C2 is connected between the input terminal and the control terminal of the touch signal driving unit DT 2; the touch electrode d is connected with the control end of the DT2, and meanwhile, since the control end of the DT2 is also connected with one end of the C2, the touch electrode d is also connected with the capacitor C2, and the capacitor C2 plays a role in controlling the voltage of the position touch electrode d.
By adopting the detection submodule with the structure, when a user performs touch operation, a sensing capacitance value is formed between a finger of the user or other touch devices and a sensing electrode connected with a sensing capacitor, and the detection of a touch position can be accurately realized by measuring the position of the sensing capacitor.
Further, each of the switching unit and the driving unit is a thin film field effect transistor TFT.
Further, as shown in fig. 2, each of the thin film field effect transistors is of a P-channel type; the control end of the driving unit is a grid electrode of the thin film field effect transistor, the input end is a source electrode, and the output end is a drain electrode; the control end of each switch unit is a grid electrode of the thin film field effect transistor, and the other two ends of each switch unit correspond to a source electrode and a drain electrode.
The transistors of the same type are used, so that the process flow can be unified, and the yield of products is improved. It can be understood by those skilled in the art that in practical applications, the types of the transistors may not be completely the same, for example, T2 and T5 may be N-channel transistors, and T3 and T6 may be P-channel transistors, as long as the on/off states of two switch units with control terminals connected to the same scan signal line are the same, the technical solution provided by the present application can be implemented, and the preferred embodiments of the present invention should not be construed as limiting the protection scope of the present invention.
Further, referring to fig. 2b, the third Scan signal line Scan [3] connected to the output sub-module 320 may be replaced with the first Scan signal line Scan [1], and correspondingly, the third Scan signal line Scan [3] connected to the control terminal of the seventh switching unit T7 may be replaced with the first Scan signal line Scan [1 ].
Further, referring to fig. 2c, based on the pixel circuit provided in fig. 2b, the second Scan signal line Scan [2] connected to the control terminal of the detection sub-module 320 is replaced with a third Scan signal line Scan [3], and correspondingly, the second Scan signal line Scan [2] connected to the control terminal of the eighth switching unit T8 is replaced with a third Scan signal line Scan [3 ].
The operation principle of the pixel circuit in fig. 2a is described with reference to fig. 3 and 4, and for convenience of description, it is assumed that each of the switching unit and the driving unit is a P-channel TFT, and the energy storage unit is a capacitor. Fig. 3 is a timing diagram of a possible scan signal of each scan signal line during operation of the pixel circuit provided by the present invention in a frame, which can be divided into four stages, which are respectively represented as a first stage W1, a second stage W2, a third stage W3, and a fourth stage W4 in fig. 3, and in each stage, the current flow direction and the voltage value of the pixel circuit are respectively shown in fig. 4a, fig. 4b, fig. 4c, and fig. 4 d.
In the first phase W1, referring to fig. 3, when Scan [2] is at low level and the other Scan signal lines are at high level, referring to fig. 4a, in the pixel compensation module 100, only T4 is turned on, and at this time, point b is reset to ground and 0V, and the voltage signal of the last frame in the capacitor C1 is reset. In the touch detection module 300, T8 is turned on, and T9 and DT2 are turned off, so that the touch detection module is reset, and after the reset, the potential at the point d is equal to the potential at Vdata. As can be seen, Scan [2] corresponds to the Reset Scan signal line of the pixel compensation module 100 and the touch detection module 300.
In the second stage W2, see fig. 3, Em and Scan [3] are at low level, and the other Scan signal lines are at high level. Referring to fig. 4b, in the pixel compensation module 100, T1, T2, T5 are turned on, T3, T4, T6 are turned off, since point b is grounded before, DT1 is driven to be turned on, a Vdd signal starts to charge point b through T1 → DT1 → T5, and the point b is charged until Vdd-Vth (satisfying that the voltage difference between the two poles of the gate and the source of DT1 is Vth), in the process, since the point a is always 0 at the ground potential, after the charging is finished, the potential at the point b is always maintained at Vdd-Vth, and in addition, since the turn-off of T6 causes no current to pass through the OLED, the lifetime loss of the OLED is indirectly reduced.
In the touch detection module 300, referring to fig. 4b, T8 is turned off, and T7 and DT2 are turned on, at this time, the coupling pulse signal (Vint) provides a potential at one end of C2 to form a coupling capacitor, and on the other hand, it serves as a source of DT2 (at this time, DT2 is equivalent to an amplifying TFT), the touch of the finger directly causes the potential of the DT2 gate to decrease (it is assumed that Vf is decreased), when the gate-source voltage of DT2 meets the MOS transistor conduction condition, a signal will pass through DT2, at this time, the touch cell buffers, i.e., "waits" for the decrease of the gate potential of DT2, and the main cause of the decrease is the touch of the finger.
If a finger touches the circuit, the potential at the point d is directly reduced, the condition that DT2 is conducted is achieved, when the I & V characteristic curve is in an amplification area, DT2 as an amplifying TFT conducts and amplifies the signal of the coupling pulse, and the Y-Read Line collects the signal in the Y direction. And Scan [3] has a function of acquiring as a horizontal (X-direction) scanning signal (since a signal in the Y-direction can be acquired only at the timing when Scan [3] is at a low level, and Scan [3] in a specific pixel at a specific timing is at a low level, the X-coordinate can be determined based on the timing when the signal in the Y-direction is acquired). This determines the X, Y coordinates of the finger touch location. In the process, as long as the finger participates in touch control, the coordinate position can be acquired at any time.
It can be seen that, in the present invention, Scan [3] plays a role of reading line X-read line of the touch signal in the X direction (the X direction corresponds to the scanning direction).
In the third stage W3, as shown in fig. 3, only Scan [1] is at a low level, and the other scanning signal lines are at a high level, and as shown in fig. 4c, in the pixel compensation module 100, T3 and T6 are turned on, and the other TFTs are turned off. At this time, the potential of the point a is from the original 0V → Vdata, and the point b is in a floating state, so that the original voltage difference (Vdd-Vth) between the point a and the point b is maintained, the potential of the gate point b of DT1 has an equal voltage jump, the potential jump of the point b is changed into Vdd-Vth + Vdata, and the voltage jump is fixed and prepared for the next stage.
In the touch detection module 300, all TFTs are turned off, and the touch detection module 300 is in a dead state. This can reduce the influence on the display process.
In the fourth stage W4, as shown in fig. 3, only Scan [1] and Em are at low level and the other scanning signal lines are at high level, and as shown in fig. 4c, in the pixel compensation module 100, T1, T3 and T6 are turned on and the other switching TFTs are turned off. Vdd causes the OLED to start emitting light along T1 → DT1 → T6.
In the touch detection module 300, all TFTs are still turned off, and the touch detection module 300 is in a dead state. This can reduce the influence on the display process.
From the TFT saturation current equation:
IOLED＝K(VGS–Vth)2＝K[Vdd–(Vdd–Vth+Vdata)–Vth]2＝K(Vdata)2
from the above equation, it can be seen that the operating current IOLED is not affected by Vth, and only related to Vdata. The problem that the threshold voltage (Vth) of the driving TFT drifts due to the process and long-time operation is thoroughly solved, the influence of the driving TFT on the IOLED is eliminated, and the normal work of the OLED is ensured.
The pixel circuits provided in fig. 2b and 2c have the same operation principle as that of the pixel circuit in fig. 2a, except that in the pixel circuits of fig. 2b or 2c, the touch signal can be detected only when Scan [1] is at low level (i.e. the third stage W3 and the fourth stage W4), where Scan [1] corresponds to X-read line; in addition, in the pixel circuit shown in fig. 2c, the touch detection module 300 can be Reset only when Scan [3] is at a low level, and Scan [3] replaces Scan [2] to be Reset line.
The utility model also provides a display device, its characterized in that, including above-mentioned arbitrary pixel circuit.
The display device here may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
Preferably, the pixel circuits are periodically distributed in the display device. In practical application, need not all adopt in the position that every pixel corresponds the utility model provides a pixel circuit (for example set up one in three pixel the utility model provides a pixel circuit sets up ordinary pixel circuit in other pixels), can realize the detection to touch-control signal equally. As shown in fig. 5, the pixel circuit (PU) provided by the present invention is provided for every three pixels.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A pixel circuit, comprising: the device comprises a pixel compensation module, a light emitting module and a touch detection module;
the pixel compensation module is respectively connected with the first to fourth scanning signal lines, the first working voltage line, the data voltage line and the light-emitting module and is used for controlling the light-emitting module to perform light-emitting display according to the input of the scanning signal lines;
the touch detection module comprises a detection submodule and an output submodule; the detection submodule is respectively connected with a second scanning signal line, a second working voltage line and a data voltage line and is used for detecting a touch signal; and the output submodule is respectively connected with the third scanning signal line, the touch signal reading line and the detection submodule and is used for outputting a detection touch signal to the touch signal reading line according to the input of the third scanning signal line.
2. The pixel circuit according to claim 1, wherein the light emitting module comprises an electroluminescent element, the electroluminescent element being coupled to the pixel compensation module.
3. The pixel circuit according to claim 2, wherein the pixel compensation module includes first to sixth switching units, a pixel driving unit, and an energy storage unit; wherein,
the first switch unit is connected between the first working voltage line and the input end of the pixel driving unit, and the control end is connected to the fourth scanning signal line;
the second switch unit, the energy storage unit and the fifth switch unit are sequentially cascaded, one end of the cascade circuit is connected to the output end of the pixel driving unit, and the other end of the cascade circuit is grounded; the control ends of the second switch unit and the fifth switch unit are connected with a third scanning signal line;
the third switching unit is connected between the first end of the energy storage unit and the data voltage line; the sixth switching unit is connected between the pixel driving unit and the electroluminescent element; the control ends of the third switch unit and the sixth switch unit are connected to the first scanning signal line;
one end of the fourth switch unit is connected to the second end of the energy storage unit, the other end of the fourth switch unit is grounded, and the control end of the fourth switch unit is connected with the second scanning signal line;
the control end of the pixel driving unit is also connected with the second end of the energy storage unit, and the output end of the pixel driving unit is also connected with the electroluminescent element.
4. The pixel circuit according to claim 3, wherein the energy storage unit is a capacitor.
5. The pixel circuit according to claim 3, wherein the output sub-module comprises a seventh switch unit, one end of the seventh switch unit is connected to the touch signal reading line, the other end of the seventh switch unit is connected to the detection sub-module, and a control end of the seventh switch unit is connected to a third scanning signal line.
6. The pixel circuit according to claim 5, wherein the detection sub-module comprises an eighth switching unit, a touch signal driving unit, a sensing capacitor, and a touch electrode, the eighth switching unit is connected between a control terminal of the touch signal driving unit and the data voltage line, and the control terminal is connected to a second scan signal line; the input end of the touch signal driving unit is connected with the second working voltage line, and the output end of the touch signal driving unit is connected with the seventh switching unit; the sensing capacitor is connected between the input end and the control end of the touch signal driving unit; the touch control electrode is connected with the control end of the touch control signal driving unit.
7. The pixel circuit according to claim 6, wherein a third scanning signal line to which the output sub-module is connected is replaced with a first scanning signal line, and a third scanning signal line to which a control terminal of the seventh switching unit is connected is replaced with the first scanning signal line.
8. The pixel circuit according to claim 7, wherein the second scanning signal line to which the control terminal of the detection sub-module is connected is replaced with a third scanning signal line, and the second scanning signal line to which the control terminal of the eighth switching unit is connected is replaced with a third scanning signal line.
9. A pixel circuit according to any one of claims 3-8, wherein each of the switching element and the driving element is a thin film field effect transistor.
10. The pixel circuit according to claim 9, wherein each of the thin film field effect transistors is of a P-channel type; the control end of the driving unit is a grid electrode of the thin film field effect transistor, the input end is a source electrode, and the output end is a drain electrode; the control end of each switch unit is a grid electrode of the thin film field effect transistor, and the other two ends of each switch unit correspond to a source electrode and a drain electrode.
11. A display device comprising the pixel circuit according to any one of claims 1 to 10.
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| CN201420272696.9U CN203895093U (en) | 2014-05-26 | 2014-05-26 | Pixel circuit and display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036723A (en) * | 2014-05-26 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN105761680A (en) * | 2014-12-30 | 2016-07-13 | 乐金显示有限公司 | Organic light emitting display |
| CN107134259A (en) * | 2017-06-28 | 2017-09-05 | 京东方科技集团股份有限公司 | Image element circuit, driving method, display module, driving method and display device |
| CN109841189A (en) * | 2017-11-29 | 2019-06-04 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel and display device |
| CN114035020A (en) * | 2021-09-29 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Back board circuit detection device and method |
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2014
- 2014-05-26 CN CN201420272696.9U patent/CN203895093U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036723A (en) * | 2014-05-26 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN105761680A (en) * | 2014-12-30 | 2016-07-13 | 乐金显示有限公司 | Organic light emitting display |
| US10157580B2 (en) | 2014-12-30 | 2018-12-18 | Lg Display Co., Ltd. | Organic light emitting display having data driver supplying sensing data voltage in a sensing mode |
| CN107134259A (en) * | 2017-06-28 | 2017-09-05 | 京东方科技集团股份有限公司 | Image element circuit, driving method, display module, driving method and display device |
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