KR20140096613A - Shift register and method for driving the same - Google Patents
Shift register and method for driving the same Download PDFInfo
- Publication number
- KR20140096613A KR20140096613A KR1020130009396A KR20130009396A KR20140096613A KR 20140096613 A KR20140096613 A KR 20140096613A KR 1020130009396 A KR1020130009396 A KR 1020130009396A KR 20130009396 A KR20130009396 A KR 20130009396A KR 20140096613 A KR20140096613 A KR 20140096613A
- Authority
- KR
- South Korea
- Prior art keywords
- node
- signal
- tft
- driving voltage
- potential driving
- Prior art date
Links
Images
Classifications
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
-
- 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
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
Abstract
Description
The present invention relates to a shift register having improved driving reliability and a driving method thereof.
As mobile electronic devices such as mobile communication terminals and notebook computers are developed, there is an increasing demand for flat panel display devices applicable thereto. In response, a liquid crystal display device (LCD), a plasma display device (PDP), an organic light emitting display device (OLED), and the like have been commercialized.
The gate driving circuit of the display devices includes a shift register for sequentially supplying gate pulses to a plurality of gate lines. The shift register sequentially outputs gate pulses through a plurality of stages including a plurality of transistors and capacitors.
Recently, a TFT (thin film transistor) of the shift register is embedded in a substrate of a display panel by using a GIP (gate in panel) method.
The TFTs constituting the GIP type shift register serve to supply gate pulses to the TFTs of the respective pixels formed on the display panel. Therefore, not only the characteristics of the basic TFT such as the mobility and the leakage current but also the durability and the electrical reliability that can maintain the long-term lifetime are very important. The semiconductor layer of the TFT is formed of amorphous silicon or polycrystalline silicon. The amorphous silicon is advantageous in that the film forming process is simple and the production cost is low, but the electrical reliability is not ensured.
In order to solve such a problem, researches using an oxide semiconductor as a semiconductor layer of a TFT are progressing. Oxide semiconductors are evaluated as amorphous and stable materials. If an oxide semiconductor is used as a semiconductor layer of a TFT, a TFT can be manufactured at a low temperature by using existing process equipment without purchasing an additional process equipment. There are several advantages such as omission of process.
FIG. 1 is a circuit diagram of a conventional shift register including an oxide TFT, and FIG. 2 is a diagram showing a drive waveform of the shift register shown in FIG. 1 shows a circuit of one stage among a plurality of stages constituting a shift register.
Referring to FIGS. 1 and 2, a shift register according to the related art includes a start signal VST, a reset signal RST, a plurality of clock signals CLK and CLKB, an initialization signal Vinid, , VSS) to generate a scan signal having a high potential driving voltage (VDD) or a low potential driving voltage (VSS) level, and sequentially supplies the scan signals generated in the plurality of stages to the gate line of the display panel. To this end, each stage of the shift register includes the first TFT (T1) to the eighth TFT (T8) and the capacitor (C).
The first to sixth TFTs T6 to T6 are turned on by the start signal VST, the reset signal RST, the boosting clock signal CLKB or the initialization signal Vinitial as a switching TFT, And supplies driving voltages VDD and VSS to the node.
The seventh TFT T7 is a full-up TFT for outputting a high voltage VDD, which is turned on by a signal input to the Q node and outputs a scan signal of a high potential voltage at an output terminal OUT.
The eighth TFT T8 is a full down TFT for outputting a low potential voltage VSS and is turned on by a signal input to the QB node to output a scan signal of a low potential voltage to the output terminal. That is, the scan signal of the high potential voltage is lowered to the low potential voltage level.
Here, the QB node which is the gate node of the fourth TFT (T4) and the eighth TFT (T8) maintains the high voltage for most of the time (90% or more time) in one frame period.
FIG. 3 is a graph showing a positive bias temperature stress (PBTS) characteristic of an oxide TFT that constitutes a GIP type shift register according to the prior art.
Referring to FIG. 3, the fourth TFT (T4) and the eighth TFT (T8, pull-down TFT) connected to the QB node are shifted in the positive direction by the positive bias deterioration (PBTS). The shift of the fourth TFT (T4) and the eighth TFT (T8, pull-down TFT) affects the falling time operation.
Since the shift register according to the related art generates the output signals VGH and VGL using the boosting of the clock signal CLK, the output signal is affected by the width of the clock signal CLK. In order to increase the output time of the signal, the width of the clock signal CLK should be increased. However, when the width of the clock signal is increased, the high output signal VGH and the low output signal VGL overlap each other and the shift register operates normally There is a problem that can not be done.
When the fourth TFT (T4) and the eighth TFT (T8, pull-down TFT) are deteriorated, the noise of the signal applied to the Q node increases, so that a multi output is generated. The output characteristic of the sixth TFT T6 which is lowered to the low potential driving voltage VSS is reduced to lower the driving reliability of the GIP shift register.
The Bias Temperature Stress (BTS) characteristic of the oxide TFT is affected by the voltage level of the gate bias, the time and the temperature, and the positive bias deterioration (PBTS) as compared to the negative bias deterioration (NBTS) Vth) shift phenomenon occurs conspicuously.
Therefore, when the GIP type shift register including the oxide TFT is applied, the driving reliability of the shift register is deteriorated due to deterioration of the TFT according to the driving time, and distortion occurs in the output signal.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a technical object to improve deterioration of a TFT constituting a GIP (gate in panel) shift register.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a technical object to enhance driving reliability of a shift register of the GIP scheme and to prevent occurrence of distortion of an output signal.
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a technical object of the present invention to simplify the logic of a shift register to form a narrow bezel liquid crystal panel.
Other features and advantages of the invention will be set forth in the description which follows, or may be obvious to those skilled in the art from the description and the claims.
A shift register of the present invention includes: a first switching TFT (thin film transistor) which is turned on by a start signal applied to a gate electrode and supplies a pulse signal of a high potential driving voltage to a first node; A pull-up TFT which is turned on by a pulse signal of a high potential driving voltage formed at the first node and outputs an output signal to an output terminal while a clock signal is applied; A second switching TFT which is turned on by an output signal boosted by the clock signal to supply the high potential driving voltage to the first node; A third switching TFT which is turned on by a reset signal supplied to the gate electrode to supply a low potential driving voltage to the first node; And a pull-down TFT which is turned on by the reset signal supplied to the gate electrode and supplies the low-potential driving voltage to the output terminal to lower the output signal.
The present invention can improve deterioration of TFTs constituting a shift register of a GIP (gate in panel) scheme.
The present invention can improve the driving reliability of the shift register of the GIP scheme and prevent the output signal from being distorted.
The present invention simplifies the logic of the shift register of the GIP type and can form a narrow bezel liquid crystal panel.
In addition, other features and advantages of the present invention may be newly understood through embodiments of the present invention.
1 is a circuit diagram of a conventional shifter resistor including an oxide TFT.
2 is a view showing a driving waveform of the shift register shown in FIG.
FIG. 3 is a graph showing the positive bias temperature stress characteristic of an oxide TFT constituting a GIP shift register according to the prior art.
4 is a view schematically showing a display device to which a shift register according to an embodiment of the present invention is applied.
5 is a circuit diagram of a shift register according to an embodiment of the present invention.
6 is a diagram illustrating a driving waveform of a shift register according to an embodiment of the present invention.
7 is a diagram illustrating a driving method of a stage according to a driving waveform of a shift register according to an embodiment of the present invention.
8 is a diagram showing output signals of a multi-stage shift register using four clock signals (CLK).
FIG. 9 is a diagram illustrating a reduced effect of the TFT and the signal line of the shift register according to the embodiment of the present invention.
It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.
Hereinafter, a shift register and a driving method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.
4 is a view schematically showing a display device to which a shift register according to an embodiment of the present invention is applied.
4, a liquid crystal display device to which a
The
The upper substrate of the
The lower substrate of the
Pixels are defined by intersection of gate lines and data lines formed on a lower substrate, and each pixel includes a thin film transistor (TFT) and a storage capacitor (Cst). In addition, the
The TFT of each pixel is switched by the scan signal supplied through the gate line, and when the TFT is turned on, the data voltage supplied through the data line is supplied to the pixel.
The arrangement state of the liquid crystal is changed in each pixel by the electric field difference between the data voltage and the common voltage, and the image is displayed by adjusting the arrangement of the liquid crystals and adjusting the transmittance of the light incident from the backlight unit.
The driving circuit unit includes a
The
The
The
The
Here, the timing signal TS includes a data enable signal DE, a horizontal synchronizing signal Hsync, a vertical synchronizing signal Vsync, and a clock signal CLK.
The gate control signal GCS may include a gate start pulse (GSP), a gate shift clock (GSC), and a gate output enable (GOE).
The data control signal DCS includes a source start pulse (SSP), a source sampling clock (SSC), a source output enable (SOE), a polarity control signal (POL) . ≪ / RTI >
The
The
The
FIG. 5 is a circuit diagram of a shift register according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating driving waveforms of a shift register according to an embodiment of the present invention.
5 and 6, each of a plurality of stages constituting a
Here, the start signal VST is a pulse signal for starting the rising of the output signal, and the reset signal RST is a pulse signal for starting falling of the output signal. That is, the output signal is maintained by the start signal VST until the reset signal RST is input.
The start signal VST and the reset signal RST are pulse signals which are turned off after the gate-on voltage level is maintained in two horizontal (2H) periods. Output of the output signal is started by the start signal VST, The output of the output signal is terminated by the reset signal RST. Since the start signal VST and the reset signal RST are signals for controlling the start and end of the output signal, they do not overlap with each other.
The clock signal CLK maintains a gate-on voltage level in two horizontal (2H) periods, then has a clock form in which the induced voltage repeats over a certain period of time, and is synchronized with the start signal VST, Can have an overlapping phase. In FIG. 6, an example in which the clock signal CLK and the start signal VST overlap each other for one horizontal period (1H) is shown. However, the present invention is not limited to this, and a clock signal whose phase is sequentially delayed by 1/2 clock or 2 clocks may be input to the stage ST.
The switching block A includes first to
The pull-up
The switching block A uses the input start signal VST, the reset signal RST and the initialization signal Vinitial to rise the output signal and shift the signal of the Q node (first node). So that the output signal is falling, that is, the output signal is a low potential voltage.
The buffer block B shifts the clock signal CLK of the high potential drive voltage VDD level according to the signal shifted by the start signal VST and outputs the shifted clock signal CLK as an output signal, ) To the low potential driving voltage (VSS) level according to the reset signal RST.
Here, the high potential driving voltage VDD can be supplied from + 20V to + 30V, and the low potential driving voltage VSS can be supplied from -10V to -20V.
7 is a diagram illustrating a driving method of a stage according to a driving waveform of a shift register according to an embodiment of the present invention.
Referring to Fig. 7 together with Figs. 5 and 6, the
7A, the
The
The gate electrode of the
Here, after the clock signal CLK ends, the
The
7 (B), the
The first terminal of the first capacitor Ca is connected to the Q node (first node), and the second terminal is connected to the second node n2 connected to the output terminal OUT. The first first capacitor Ca maintains the Q node (first node) constantly at the high potential driving voltage VDD to output the noise of the output signal OUT to the output OUT which is boosted by the clock signal CLK. ).
The first terminal of the second capacitor Cb is connected to the Q node (first node), and the second terminal is connected to the third node n3 to which the reset signal RST is supplied. The second capacitor Cb maintains the Q node (the first node) and the third node n3 at a constant voltage to remove the noise of the reset signal RST.
The gate electrode of the pull-up
As shown in Fig. 7A, the pull-up
Here, the pull-up
6 and 7B, when the clock signal CLK ends, the pull-up
The gate electrode of the pull-down
7 (B), the pull-down
In the shift register according to the embodiment of the present invention, when the
8 is a diagram showing output signals of a multi-stage shift register using four clock signals (CLK).
As shown in FIG. 8, an output signal of the multi-stage shift register can be generated by using four clock signals CLK overlapping one horizontal (1H) period in two horizontal (2H) periods. That is, the four clock signals CLK are sequentially applied to m stages, and output signals are sequentially generated at m stages. In FIG. 7, timing of the output signals for the (N-1) th stage, the (N) th stage, the (N + 1) th stage, and the (N + 2)
Output lines of each of the m stages ST1 to STm constituting the shift register are connected to m gate lines GL1 to GLm formed in the liquid crystal panel, respectively.
Each of the m stages ST1 to STm starts driving by the start pulse signal SVST and generates a gate-on voltage level < RTI ID = 0.0 >Quot; out " Accordingly, a scan pulse of a gate-on voltage level (VDD) is supplied to each of the plurality of gate lines GL1 to GLm for a predetermined horizontal period, and a low-potential driving voltage VSS of a gate- .
The shift register according to the embodiment of the present invention removes the QB node which is essential in the shift register of the related art to improve the positive bias deterioration (PBTS) phenomenon of the QB node and increase the driving reliability of the GIP type shift register have.
FIG. 9 is a diagram illustrating a reduced effect of the TFT and the signal line of the shift register according to the embodiment of the present invention.
Referring to FIG. 9, in comparison between the shift register according to the embodiment of the present invention and the logic of the shift register according to the related art, it is possible to reduce the number of the switching TFTs for rising and falling of the output signal by three for each stage have.
In the shift register according to the related art, seven input signal lines are formed. In the present invention, a signal line for supplying a clock signal (CLKB) to the QB node formed in the prior art Thereby forming six input signal lines.
This can reduce the number of TFTs and signal lines, reduce the logic area of the GIP to form a shift register compared to conventional devices, and improve the product's competitiveness by enabling narrow bezel design .
It will be understood by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.
The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.
100: liquid crystal panel 110: shift register
111: first switching TFT 112: second switching TFT
113: third switching TFT 114: pull-up TFT
115: pull-down TFT Ca: first capacitor
Cb: second capacitor ST: stage
200: main controller 300: pad
Claims (10)
A pull-up TFT which is turned on by a pulse signal of a high potential driving voltage formed at the first node and outputs an output signal to an output terminal while a clock signal is applied;
A second switching TFT which is turned on by an output signal boosted by the clock signal to supply the high potential driving voltage to the first node;
A third switching TFT which is turned on by a reset signal supplied to the gate electrode to supply a low potential driving voltage to the first node; And
And a pull-down TFT which is turned on by the reset signal supplied to the gate electrode and supplies the low-potential driving voltage to the output terminal to lower the output signal.
The first terminal is connected to the first node and the second terminal is connected to the second node connected to the output terminal, and the first node is maintained at a constant voltage to eliminate noise of the output signal And a shift register.
A second capacitor connected to a third node to which a first terminal is connected to the first node and a second terminal to which the reset signal is supplied and which maintains the third node at a constant voltage to remove noise of the reset signal; Wherein the shift register further comprises a shift register.
Wherein the pull-up TFT uses the clock signal of the high potential driving voltage level to raise the output signal to output to the output terminal.
And the second switching TFT is turned on when the voltage of the first node falls below the high potential driving voltage after the clock signal is terminated to maintain the first node at the high potential driving voltage. register.
The start signal is supplied to the gate electrode of the first switching TFT, the source electrode is connected to the first power supply line to which the high potential driving voltage is supplied, the drain electrode is connected to the first node,
A gate electrode of the second switching TFT is connected to the output terminal, a source electrode is connected to the first power supply line, a drain electrode is connected to the first node,
The reset signal is supplied to a gate electrode of the third switching TFT, the source electrode is connected to a second power supply line to which the low potential driving voltage is supplied, the drain electrode is connected to the first node,
A gate electrode of the pull-up TFT is connected to the first node, a source electrode is connected to a signal line to which the clock signal is applied, a drain electrode is connected to the output terminal,
A gate electrode of the pull-down TFT is connected to a third node to which the reset signal is applied, a source electrode is connected to a second power supply line to which the low potential driving voltage is supplied, and a drain electrode is connected to the output terminal Shift register.
Wherein the first switching TFT is formed in a double gate structure and is turned on by an initialization signal supplied to the gate electrode to supply the high potential driving voltage to the first node.
A high-potential driving voltage is formed at the first node by the start signal (VST) to turn on the pull-up TFT, and the pull-up TFT is turned on to bootstrap the output terminal through a clock signal. register.
The pull-up TFT is turned on by the clock signal to form a double high-potential driving voltage at the output terminal,
When the clock signal is terminated, the pull-up TFT is turned off, so that the voltage of the output terminal is lowered to the high potential driving voltage at twice the high potential driving voltage,
The voltage of the output terminal is maintained at the high potential driving voltage for a predetermined time before the reset signal is applied to the pull-down TFT,
And the voltage of the output terminal is lowered to the low potential voltage by the reset signal.
Wherein four clock signals overlapping one horizontal period in two horizontal periods are sequentially applied to the plurality of stages to output an output signal sequentially shifted by one horizontal period.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020130009396A KR102023641B1 (en) | 2013-01-28 | 2013-01-28 | Shift register and method for driving the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020130009396A KR102023641B1 (en) | 2013-01-28 | 2013-01-28 | Shift register and method for driving the same |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20140096613A true KR20140096613A (en) | 2014-08-06 |
KR102023641B1 KR102023641B1 (en) | 2019-09-20 |
Family
ID=51744429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020130009396A KR102023641B1 (en) | 2013-01-28 | 2013-01-28 | Shift register and method for driving the same |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR102023641B1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105206234A (en) * | 2015-09-17 | 2015-12-30 | 京东方科技集团股份有限公司 | Shift register unit, grid drive method, circuit and grid drive device |
WO2016108462A1 (en) * | 2014-12-31 | 2016-07-07 | LG Display Co.,Ltd. | Flexible display device with gate-in-panel circuit |
JP2016143059A (en) * | 2015-01-29 | 2016-08-08 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | Display device |
US9589993B2 (en) | 2015-03-24 | 2017-03-07 | Samsung Display Co., Ltd. | Thin film transistor array panel and manufacturing method thereof |
US9767752B2 (en) | 2015-04-30 | 2017-09-19 | Samsung Display Co., Ltd. | Gate driving circuit and display device including the same |
CN107909980A (en) * | 2017-12-27 | 2018-04-13 | 深圳市华星光电技术有限公司 | GOA circuits and the liquid crystal display device with the GOA circuits |
US10198998B2 (en) | 2015-05-28 | 2019-02-05 | Samsung Display Co., Ltd. | Gate driver shift register and mask circuit and display device using the same |
KR20190056671A (en) * | 2017-11-17 | 2019-05-27 | 엘지디스플레이 주식회사 | Shift register and display device comprising the same |
WO2020052343A1 (en) * | 2018-09-11 | 2020-03-19 | 京东方科技集团股份有限公司 | Shift register unit and drive method therefor, gate driver circuit, and display device |
KR20200070156A (en) * | 2018-12-06 | 2020-06-17 | 보에 테크놀로지 그룹 컴퍼니 리미티드 | Shift register, light emission control circuit, and display panel |
US10755679B2 (en) | 2017-09-06 | 2020-08-25 | Hannstar Display Corporation | Gate driving circuit and display panel |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080033630A (en) * | 2006-10-12 | 2008-04-17 | 삼성에스디아이 주식회사 | Shift register and organic light emitting display device using the same |
KR20080081822A (en) * | 2007-03-05 | 2008-09-10 | 미쓰비시덴키 가부시키가이샤 | Shift register circuit and image display apparatus containing the same |
KR20120044771A (en) * | 2010-10-28 | 2012-05-08 | 엘지디스플레이 주식회사 | Gate shift register and display device using the same |
KR20120063677A (en) * | 2010-12-08 | 2012-06-18 | 엘지디스플레이 주식회사 | Electrophoretic display device and method for operating the same |
-
2013
- 2013-01-28 KR KR1020130009396A patent/KR102023641B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080033630A (en) * | 2006-10-12 | 2008-04-17 | 삼성에스디아이 주식회사 | Shift register and organic light emitting display device using the same |
KR20080081822A (en) * | 2007-03-05 | 2008-09-10 | 미쓰비시덴키 가부시키가이샤 | Shift register circuit and image display apparatus containing the same |
KR20120044771A (en) * | 2010-10-28 | 2012-05-08 | 엘지디스플레이 주식회사 | Gate shift register and display device using the same |
KR20120063677A (en) * | 2010-12-08 | 2012-06-18 | 엘지디스플레이 주식회사 | Electrophoretic display device and method for operating the same |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016108462A1 (en) * | 2014-12-31 | 2016-07-07 | LG Display Co.,Ltd. | Flexible display device with gate-in-panel circuit |
US10262580B2 (en) | 2014-12-31 | 2019-04-16 | Lg Display Co., Ltd. | Flexible display device with gate-in-panel circuit |
JP2016143059A (en) * | 2015-01-29 | 2016-08-08 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | Display device |
US11176870B2 (en) | 2015-01-29 | 2021-11-16 | Samsung Display Co., Ltd. | Display apparatus having gate driving circuit |
US10418387B2 (en) | 2015-03-24 | 2019-09-17 | Samsung Display Co., Ltd. | Thin film transistor array panel with intergrated gate driver and manufacturing method thereof |
US9589993B2 (en) | 2015-03-24 | 2017-03-07 | Samsung Display Co., Ltd. | Thin film transistor array panel and manufacturing method thereof |
US11075223B2 (en) | 2015-03-24 | 2021-07-27 | Samsung Display Co., Ltd. | Thin film transistor array panel with integrated gate driver including noise removal unit |
US9767752B2 (en) | 2015-04-30 | 2017-09-19 | Samsung Display Co., Ltd. | Gate driving circuit and display device including the same |
US10198998B2 (en) | 2015-05-28 | 2019-02-05 | Samsung Display Co., Ltd. | Gate driver shift register and mask circuit and display device using the same |
CN105206234A (en) * | 2015-09-17 | 2015-12-30 | 京东方科技集团股份有限公司 | Shift register unit, grid drive method, circuit and grid drive device |
US10755679B2 (en) | 2017-09-06 | 2020-08-25 | Hannstar Display Corporation | Gate driving circuit and display panel |
EP3486894A3 (en) * | 2017-11-17 | 2019-08-07 | LG Display Co., Ltd. | Shift register and display device comprising the same |
US10726764B2 (en) | 2017-11-17 | 2020-07-28 | Lg Display Co., Ltd. | Shift register and display device comprising the same |
CN109859665A (en) * | 2017-11-17 | 2019-06-07 | 乐金显示有限公司 | Shift register and display device including the shift register |
KR20190056671A (en) * | 2017-11-17 | 2019-05-27 | 엘지디스플레이 주식회사 | Shift register and display device comprising the same |
CN107909980A (en) * | 2017-12-27 | 2018-04-13 | 深圳市华星光电技术有限公司 | GOA circuits and the liquid crystal display device with the GOA circuits |
WO2020052343A1 (en) * | 2018-09-11 | 2020-03-19 | 京东方科技集团股份有限公司 | Shift register unit and drive method therefor, gate driver circuit, and display device |
US11468820B2 (en) | 2018-09-11 | 2022-10-11 | Fuzhou Boe Optoelectronics Technology Co., Ltd. | Control circuit configuration for shift register unit, gate driving circuit and display device, and method for driving the shift register unit |
KR20200070156A (en) * | 2018-12-06 | 2020-06-17 | 보에 테크놀로지 그룹 컴퍼니 리미티드 | Shift register, light emission control circuit, and display panel |
US11475826B2 (en) | 2018-12-06 | 2022-10-18 | Beijing Boe Technology Development Co., Ltd. | Shift register having isolation circuits, light-emitting control circuit, and display panel |
Also Published As
Publication number | Publication date |
---|---|
KR102023641B1 (en) | 2019-09-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102023641B1 (en) | Shift register and method for driving the same | |
US9997112B2 (en) | Display device | |
US9190169B2 (en) | Shift register and flat panel display device having the same | |
US9824771B2 (en) | Gate shift register and display device using the same | |
KR101679855B1 (en) | Gate shift register and display device using the same | |
TWI430577B (en) | Shift register and display device using the same | |
US8982107B2 (en) | Scanning signal line drive circuit and display device provided with same | |
KR101396942B1 (en) | Gate driving unit and liquid crystal display device comprising the same | |
US11024245B2 (en) | Gate driver and display device using the same | |
US9910329B2 (en) | Liquid crystal display device for cancelling out ripples generated the common electrode | |
US9786239B2 (en) | GOA circuit based on P-type thin film transistors | |
WO2013021930A1 (en) | Liquid-crystal display device and method of driving same | |
US10235955B2 (en) | Stage circuit and scan driver using the same | |
KR102281753B1 (en) | Stage circuit and scan driver using the same | |
JP2009015291A (en) | Display device and driving method thereof | |
KR101901248B1 (en) | Gate shift register and display device using the same | |
KR20090031052A (en) | Gate diriver and method for driving display apparatus having the smae | |
US10748465B2 (en) | Gate drive circuit, display device and method for driving gate drive circuit | |
KR102268519B1 (en) | Gate In Panel structure for dual output | |
US10473958B2 (en) | Shift register, display device provided with same, and method for driving shift register | |
US20190108810A1 (en) | Shift register and display device provided with same | |
KR20140147203A (en) | Shift register and flat panel display device including the same | |
WO2012147637A1 (en) | Liquid crystal display device | |
KR20140036729A (en) | Gate shift register and flat panel display using the same | |
KR102015848B1 (en) | Liquid crystal display device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant |