WO2013104204A1 - 电子纸显示器件及驱动方法 - Google Patents
电子纸显示器件及驱动方法 Download PDFInfo
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- WO2013104204A1 WO2013104204A1 PCT/CN2012/083453 CN2012083453W WO2013104204A1 WO 2013104204 A1 WO2013104204 A1 WO 2013104204A1 CN 2012083453 W CN2012083453 W CN 2012083453W WO 2013104204 A1 WO2013104204 A1 WO 2013104204A1
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- electronic paper
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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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
- G09G3/2003—Display of colours
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
- G09G3/2081—Display of intermediate tones by a combination of two or more gradation control methods with combination of amplitude modulation and time modulation
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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
- G09G3/34—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
- G09G3/3433—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1676—Electrodes
- G02F1/16766—Electrodes for active matrices
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
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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
- 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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0205—Simultaneous scanning of several lines in flat panels
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0224—Details of interlacing
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0262—The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0252—Improving the response speed
Definitions
- Embodiments of the present invention relate to an electronic paper display device and a driving method. Background technique
- Electronic paper display devices also known as electronic paper, digital paper
- the thickness of the electronic paper display device can be made comparable to ordinary paper and can be reused; moreover, the electronic paper display device can display a dynamic picture. Therefore, the electronic segment.
- Electrophoresis refers to the movement of charged particles in an applied electric field.
- the electrophoretic display is a bistable display, and the particles in the electrophoresis fluid have two stable states. If there is no external force, this steady state does not change, so that the display pattern can be maintained for a long time. Therefore, the electrophoretic display has an extremely low power consumption level.
- the microcup technology firstly creates an isolated lattice on the substrate, then injects the electrophoresis liquid into the lattice, and blocks the aggregation of the particles by the barrier wall between the lattices, thereby improving the stability and life of the electrophoretic display.
- TFT Thin Film Transistor
- the electrophoretic type electronic paper display device generally includes an upper substrate and a lower substrate disposed opposite to each other with a layer of electrophoretic particles interposed therebetween.
- a common electrode is disposed on the upper substrate; a pixel electrode is disposed on the lower substrate, and the pixel electrodes are generally arranged in a matrix, and each pixel electrode corresponds to one pixel.
- TFT active matrix For example, the pixel electrode and the drain electrode in the TFT are connected through the via, the source electrode in the TFT is connected to the signal line, and the gate electrode in the TFT is connected on the gate line. Based on the above structure, the gate of each pixel is controlled by the gate line.
- the active layer becomes conductive to connect the drain electrode and the source electrode, and the pixel electrode connected to the TFT can be applied with a signal voltage by the signal line.
- the signal voltage applied to the pixel electrode cooperates with a common voltage on the common electrode to form an electric field in the electrophoretic particle layer that moves the electrophoretic particles to form a desired pattern.
- the electrophoretic electronic paper display device using the active matrix driving technology because the electrophoretic particles need to move in the liquid, the swimming speed itself is slow, resulting in a slow response speed of the electrophoretic electronic paper display device, and it is difficult to achieve gray Degree display.
- the active backplane there are two reasons for this from the active backplane.
- the leakage current of the electronic paper display device is large, in order to ensure good voltage stability, a large storage capacitor is required, but a large storage capacitor makes the charging and discharging time longer, which causes the refresh of the electronic paper display device.
- the speed is slower; on the other hand, because the driving method of electronic paper is pulse width modulation (PWM), that is, a gray scale change must be achieved by dozens or even dozens of refreshes, which also leads to electronic paper. It is difficult to realize multi-gradation display of the display device, and the image refreshing speed is slow, and it is difficult to realize dynamic display. Moreover, the current driving method is to complete an image update by combining dozens or even dozens of screen refreshes. This ten or even dozens of refresh combinations is called a waveform. Different gray levels generally require dozens of pulse combinations.
- PWM pulse width modulation
- the frequency of the screen refresh is basically fixed (approximately 50 ⁇ )
- the frequency at which each pixel voltage is refreshed is also fixed (ie, coincides with the screen refresh frequency), that is, the interval between pulses is fixed.
- the pixel voltage for each refresh is also fixed (eg 0V, ⁇ 15V or ⁇ 30V). Therefore, there are fewer possible combinations and no more grayscale displays can be achieved. Summary of the invention
- Embodiments of the present invention provide an electronic paper display device and a driving method which are fast in refreshing speed and capable of realizing multi-gradation display.
- An aspect of the present invention provides an electronic paper display device including a plurality of pixels, a plurality of gate lines, and a plurality of data lines, each of the pixels including at least two thin film transistors, each of which is associated with a corresponding data line It is electrically connected to the corresponding gate line, and each thin film transistor is turned on once in one refresh period.
- each pixel includes at least two sub-pixels, each sub-pixel includes at least two thin film transistors, each of which is electrically connected to a corresponding data line and a corresponding gate line, respectively, and Each thin film transistor is turned on once in a refresh cycle.
- the electronic paper display device further includes: a resin protective insulating layer on the plurality of pixels.
- the at least two thin film transistors are of a single gate structure or a double gate structure.
- the at least two thin film transistors are polysilicon or oxide thin film transistors.
- the at least two thin film transistors are organic thin film transistors.
- Another aspect of the present invention provides a driving method of an electronic paper display device, including: the driving device acquires a gray level of each pixel in the electronic paper display device according to the input video data signal, according to the film included in the pixel a number N of transistors, and a gray level of the pixels, determining an opening order and a time interval of each thin film transistor in each pixel to form a gray scale display scheme; applying a gate voltage to a gate line corresponding to each thin film transistor of each pixel At the same time, a signal voltage is applied to the data lines corresponding to the respective thin film transistors of the respective pixels in accordance with the formed gray scale display scheme to respectively drive each pixel to exhibit its gray level, for example, N is a natural number, and ⁇ 2.
- the applying a signal voltage to a data line corresponding to each thin film transistor of each pixel according to the formed gradation display scheme includes: each thin film transistor to each pixel according to the formed gradation display scheme
- the corresponding data lines apply a plurality of sets of signal voltages of different set sizes to drive each pixel to exhibit its gray level.
- the plurality of sets of signal voltages of different set sizes are 0V, soil 10V, ⁇ 15V or ⁇ 30V.
- the opening time intervals of the respective thin film transistors are the same.
- Embodiments of the present invention provide an electronic paper display device and a driving method thereof, wherein at least two independently controllable TFTs are included by one pixel, and the two TFTs are connected to respective corresponding gate lines and data lines, so that The e-paper display device can be refreshed at least twice during the refresh cycle. That is, in the electronic paper display device, at least two rows of TFTs are simultaneously turned on at each timing of scanning. Moreover, the above two refreshes can be matched with multiple sets of different voltages and different cycle intervals. This speeds up The refresh rate reduces the requirement for storage capacitors. And faster refresh rates allow for faster grayscale updates, and by setting different refresh cycle intervals, more pulse combination schemes are available for more and faster grayscale display. DRAWINGS
- FIG. 1 is a schematic structural view of an electronic paper display device according to Embodiment 1 of the present invention.
- FIG. 2 is a driving waveform diagram of a gate line in an electronic paper display device according to Embodiment 1 of the present invention
- FIG. 3 is a waveform diagram of a pixel refresh signal of an electronic paper display device according to Embodiment 1 of the present invention
- Fig. 4 is a view showing a waveform of a pixel refresh signal of different voltages which are not equally spaced in the electronic paper display device according to Embodiment 1 of the present invention. detailed description
- Embodiments of the present invention provide an electronic paper display device including a plurality of pixels defined by a plurality of gate lines and a plurality of data lines, the plurality of pixels being arranged, for example, in a matrix array manner.
- Each pixel includes at least two Thin Film Transistors (TFTs).
- TFTs Thin Film Transistors
- Each TFT is electrically connected to a corresponding data line and a gate line, respectively, and each TFT is opened once in one refresh period, so the electronic paper display device is refreshed at least twice in one refresh period, which improves the electronic paper Displays the refresh rate of the device.
- Each of the pixels in the electronic paper display device of the embodiment of the present invention may further include at least two sub-pixels, each of the sub-pixels including at least two TFTs, each of which is electrically connected to a corresponding data line and a gate line, respectively, and is refreshed Each TFT is turned on once in the cycle, which further improves the refresh rate of the electronic paper display device.
- the electronic paper display device of the embodiment of the present invention may further include a protective insulating layer (PVX) on the pixel, the material of which may be a resin for increasing the aperture ratio.
- PVX protective insulating layer
- At least two TFTs of each pixel or sub-pixel in the electronic paper display device of the embodiment of the present invention may be a single gate structure or a double gate structure.
- a double-gate TFT has a small leakage current, which reduces the requirement for storage capacitors.
- At least two TFTs of each pixel or sub-pixel in the electronic paper display device of the embodiment of the present invention may be used to charge and discharge a voltage to the same pixel, and the voltage may be 0V, ⁇ 10V, ⁇ 15V or ⁇ 30V.
- grayscale combinations can be achieved.
- high-voltage display such as ⁇ 30V
- low voltage such as ⁇ 10V
- At least two TFTs of each pixel or sub-pixel have the same opening period, but the period intervals may be different.
- the at least two TFTs are driven using different open period intervals, more gray scale combinations can be realized, and in particular, when a different voltage is applied to the at least two TFTs as described above, a high voltage can be supplied to the pixels. After that, a low voltage is quickly applied, and finer grayscale control can be performed after a quick response.
- the at least two TFTs of each pixel or sub-pixel in the electronic paper display device of the embodiment of the present invention may be a high mobility semiconductor active layer such as polysilicon (p-Si) or oxide thin film transistor (Oxide TFT) to achieve more Fast charging speed.
- a high mobility semiconductor active layer such as polysilicon (p-Si) or oxide thin film transistor (Oxide TFT) to achieve more Fast charging speed.
- At least two TFTs of each pixel or sub-pixel in the electronic paper display device of the embodiment of the present invention may be an organic thin film transistor (OTFT) in order to obtain flexibility.
- OTFT organic thin film transistor
- At least two TFTs of each pixel or sub-pixel in the electronic paper display device of the embodiment of the present invention may be a single gate structure or a double gate structure.
- the electronic paper display device includes a plurality of gate lines (labeled as Gatel, Gate 2, etc., respectively) and a plurality of data lines (labeled as Datal, Data2, . . . Etc., these gate lines and data lines cross each other to define an array of pixels, including pixel 1, pixel 2, ... pixel 16, etc.
- gate lines labeled as Gatel, Gate 2, etc.
- Datal Data2, . . . Etc.
- the pixel 1 includes a TFT 11 and a TFT 12 pixel 2 including a TFT 21 and a TFT 22;
- the pixel 3 includes a TFT 31 and a TFT 32 pixel 4 including a TFT 41 and a TFT 42;
- the pixel 5 includes a TFT 51 and a TFT 52 pixel 6 including a TFT 61 and a TFT 62;
- the pixel 7 includes a TFT 71 and a TFT 72 pixel 8 including a TFT 81 and a TFT 82;
- the pixel 9 includes a TFT 91 and a TFT 92.
- the pixel 10 includes a TFT 101 and a TFT 102;
- the pixel 11 includes a TFT 111 and a TFT 112.
- the pixel 12 includes a TFT 121 and a TFT 122.
- the pixel 13 includes a TFT 131 and a TFT 132.
- the pixel 14 includes a TFT 141 and a TFT 142.
- the pixel 15 includes a TFT 151 and a TFT 152.
- the pixel 16 includes a TFT 161 and a TFT 162.
- Pixels 1-16 are arranged in a 4*4 matrix. For each pixel, there are two gate lines and two data lines corresponding to two of the TFTs. Of course, embodiments of the present invention are not limited to the above-described 4*4 matrix arrangement, and may be any n*m matrix arrangement as needed. n, m can be a natural number greater than 1.
- the data line Data1 is electrically connected to the TFT 11, the TFT 51, the TFT 91, and the TFT 131;
- the data line Data2 is electrically connected to the TFT 12, the TFT 52, the TFT 92, and the TFT 132;
- the data line Data3 is electrically connected to the TFT 21, the TFT 61, the TFT 101, and the TFT 141;
- the data line Data4 is electrically connected to the TFT 22, the TFT 62, the TFT 102, and the TFT 142;
- the data line Data5 is electrically connected to the TFT 31, the TFT 71, the TFT 111, and the TFT 151;
- the data line Data6 is electrically connected to the TFT32, the TFT72, the TFT 112, and the TFT 152;
- the data line Data7 is electrically connected to the TFT 41, the TFT 81, the TFT 121, and the TFT 161;
- the data line Data8 is electrically connected to the TFT 42, TFT 82, TFT 122, and TFT 162.
- the data line Datal-8 is, for example, connected to a data driver.
- the gate line Gatel is electrically connected to the TFT 11, the TFT 21, the TFT 31, and the TFT 41;
- the gate line Gate 2 is electrically connected to the TFT 12, the TFT 22, the TFT 32, and the TFT 42;
- the gate line Gate3 is electrically connected to the TFT 51, the TFT 61, the TFT 71, and the TFT 81;
- the gate line Gate4 is electrically connected to the TFT 52, the TFT 62, the TFT 72, and the TFT 82;
- the gate line Gate5 is electrically connected to the TFT 91, the TFT 101, the TFT 111, and the TFT 121;
- the gate line Gate6 is electrically connected to the TFT 92, the TFT 102, the TFT 112, and the TFT 122;
- the gate line Gate7 is electrically connected to the TFT 131, the TFT 141, the TFT 151, and the TFT 161;
- the gate line Gate8 is electrically connected to the TFT 132, the TFT 142, the TFT 152, and the TFT 162.
- the gate line Gatel-8 is, for example, connected to a gate driver.
- the driving waveform signal as shown in FIG. 2 is used to drive the gate line Gatel,
- Gate2-Gate 8 so that the TFTs in the above pixels are respectively turned on once in one refresh period, so that two rows of TFTs are turned on at the same time, and each pixel is charged and discharged twice in one refresh period.
- the signal of each gate line is at a high level, a row of pixel TFTs corresponding to the gate line will be in an on state, that is, the source and drain electrodes are electrically connected to each other, so that the pixels can be charged and discharged through the corresponding data lines.
- the odd-numbered first gate lines Gate l, . . 2n+l gate lines Gate 2 ⁇ +1 , ..., 4 ⁇ -1 gate lines Gate 4n-l which are sequentially scanned from small to large; and evenly numbered 2n+2 grids
- the line Gate 2n+2 to the 4nth gate line Gate 4n are then sequentially scanned from the second gate line Gate 2 to the 2nth gate line Gate 2n from small to large and then from large to small.
- the first gate line Gate 1 and the 2n+2 gate lines Gate 2n+2 are scanned, and a turn-on voltage is applied, so that the first row and the n+1th row of pixels are turned on;
- the third gate line Gate 3 and the second n+4 gate line Gate 2n+4 are scanned, and a turn-on voltage is applied, so that the second row and the n+th row of pixels are turned on;
- the 2n-1th gate line Gate 2n-1 and the 4nth gate line Gate 4n are scanned, and a turn-on voltage is applied, so that the nth row and the 2nth row of pixels are turned on;
- the 2n+1th gate line Gate 2n+1 and the second gate line Gate 2 are scanned, and a turn-on voltage is applied, so that the n+1th row and the 1st row of pixels are turned on;
- the 4n-1th gate line Gate 4n-1 and the 2nth gate line Gate 2n are scanned, and an ON voltage is applied, so that the 2nth row and the nth row of pixels are turned on.
- the scan of one refresh cycle ends.
- each row of pixels is turned on twice, with the time required to scan n rows before and after.
- the row of pixels can be charged separately by different sets of data lines. For example, for the first row of pixels, when first scanned, each pixel in the row of pixels is charged and discharged by the odd-numbered data lines (ie, data lines Data1, Data3, ...); At the time of scanning, each of the pixels in the row is charged and discharged by the even-numbered data lines (i.e., the data lines Data2, Data4, ).
- the odd-numbered data lines are used for scanning to charge and discharge the pixels of the corresponding row;
- even-numbered 2n+2 gate lines Gate 2n+2 to 4n gate lines Gate 4n and from the 2nd gate line Gate 2 to the 2nth gate line Gate 2n, even-numbered data lines are used for scanning.
- Charge and discharge the pixels of the corresponding row The same pixel can be charged and discharged with the same voltage or a different voltage as shown in FIG. As shown in FIG.
- the cycle of two charge and discharge is the same, but the cycle intervals may be the same or different as shown in FIG. This can be done by changing the scanning method. Different scanning methods can have different scanning cycles.
- the pixels L1, 1 ⁇ 2, .11 indicate the first pixel of the pixels of the first, second, ..., n rows, respectively.
- the time interval between each row of pixels being turned on and off twice is the time required to scan n rows, but is not limited thereto, and may be, for example, any natural number smaller than n.
- the interval time is the time required to scan one line
- the pixel in the first row is turned on
- the pixel in the second row is also turned on
- the pixel in the third row is also turned on
- the 2nd-th row of pixels is turned on
- the 2nth row of pixels is also turned on
- the 1st row of pixels is also Was opened.
- the two open time intervals for the first row of pixels are not the time required to scan one line, but do not affect the performance of the entire display device.
- the present embodiment also provides a driving method of an electronic paper display device which can be used for driving the electronic paper display device of the present invention, for example, driving the electronic paper display device of the above-described Embodiment 1.
- the driving method of this embodiment is as follows.
- the driving device acquires a gray level of each pixel in the electronic paper display device according to the input video data signal, and determines each thin film transistor in each pixel according to the number N of thin film transistors included in the pixel and the gray level of the pixel.
- the order and time interval are opened to form a gray scale display scheme. For example, only the on and off order and time of each thin film transistor can be determined.
- the opening time intervals of the respective thin film transistors may be the same or different.
- the driving device applies a gate voltage to the gate line corresponding to each thin film transistor of each pixel to gate the corresponding pixel, and at the same time, the driving device applies the data line corresponding to each thin film transistor of each pixel according to the gray scale display scheme.
- the signal voltage is used to drive each pixel to exhibit its gray level, such as brightening or darkening.
- N is a natural number, and ⁇ ⁇ 2.
- the driving device can apply a plurality of sets of signal voltages of different set sizes to the data lines corresponding to the thin film transistors of the respective pixels according to the gray scale display scheme, respectively, and drive each pixel to display the gray level thereof, thereby obtaining more gray. Degree combination to achieve the set grayscale display scheme.
- the same pixel can be charged and discharged.
- the voltage can be 0V, ⁇ 10V, ⁇ 15V or ⁇ 30V;
- grayscale combinations can be achieved, for example, high-voltage display can be used in high-definition display for high-speed display, even dynamic video, in fine grayscale control. , use low voltage to achieve finer and more grayscale.
- the opening periods of the at least two TFTs are the same, that is, as long as the at least two TFTs are respectively turned on once in one refresh period, the opening period of each TFT is the same.
- each pixel contains two independently controllable TFTs, and a total of 4*4 of 4 rows of pixels, and one refresh period includes four refreshing times as an example for description.
- Each row of pixels has two gate lines, and there are eight Gate lines.
- the gate lines Gatel and Gate2 respectively control two TFTs of the first row of pixels, and the gate lines Gate3 and Gate4 respectively control two TFTs of the second row of pixels, the gate lines.
- Gate5 and Gate6 respectively control two TFTs of the third row of pixels, and gate lines Gate7 and Gate8 respectively control the fourth row of pixels The two TFTs.
- the gate lines Gatel and Gate6 are turned on, and the pixels in the first row and the third row are respectively turned on, and the voltages can be written through the respective independent data lines;
- the gate lines Gate3 and Gate8 are turned on, and the pixels in the second row and the fourth row are respectively turned on, and the voltage can be written through the independent data lines; in a refresh cycle.
- each of the pixels in the 4th row and the 2nd row has a TFT turned on, and the voltage can be written through the respective independent data lines.
- the opening period of each TFT is the same, and the TFTs of two rows of pixels are simultaneously turned on in the same refreshing time of one refresh period.
- the at least two TFTs are driven using different open period intervals, more gray scale combinations can be realized, and in particular, when a different voltage is applied to the at least two TFTs as described above, a high voltage can be supplied to the pixels. After that, a low voltage is quickly applied, and finer grayscale control can be performed after a quick response.
- each pixel shown in FIG. 1 includes two independently controllable TFTs, and has 4 rows of 4*4 pixels, and a refresh cycle includes four refreshing times as an example.
- Each row of pixels has two gate lines, and there are eight Gate lines.
- the gate lines Gatel and Gate2 respectively control two TFTs of the first row of pixels, and the gate lines Gate3 and Gate4 respectively control two TFTs of the second row of pixels, the gate lines.
- Gate5 and Gate6 respectively control two TFTs of the third row of pixels, and gate lines Gate7 and Gate8 respectively control the two TFTs of the fourth row of pixels.
- the gate lines Gatel and Gate4 are turned on, and the pixels in the first row and the second row are respectively turned on, and the voltages can be written through the respective independent data lines;
- the gate lines Gate3 and Gate6 are turned on, and the pixels in the second row and the third row are respectively turned on, and the voltage can be written through the independent data lines;
- the gate lines Gate5 and Gate8 are turned on, and the pixels of the third row and the fourth row are respectively turned on, and the voltage can be written through the independent data lines; the fourth moment in a refresh cycle When the gate lines Gate7 and Gate2 are turned on, the pixels in the fourth row and the first row are respectively turned on, and can be written by the respective independent data lines.
- the opening period of each TFT is the same, but the time interval of opening the two TFTs of the same pixel may be different, that is, the period interval is different, and the same refresh time of one refresh period can be realized, and two rows are simultaneously opened.
- Pixel TFT the time interval of opening the two TFTs of the same pixel may be different, that is, the period interval is different, and the same refresh time of one refresh period can be realized, and two rows are simultaneously opened.
- the embodiments of the present invention disclose an electronic paper display device and a driving method thereof.
- at least two independently controllable TFTs are included by one pixel, and the two TFTs have independent gate lines and data lines, so that at least two cycles can be refreshed during a refresh period of the conventional electronic paper display device.
- at least two rows of TFTs are simultaneously turned on at each moment in the electronic paper display device.
- the above two refreshes can be matched with multiple sets of different voltages and different cycle intervals. This speeds up the refresh rate and reduces the need for storage capacitors. And faster refresh rates allow for faster grayscale updates, with more pulse-combining schemes by setting different refresh cycle intervals for more and faster grayscale display.
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US13/876,651 US9311892B2 (en) | 2012-01-09 | 2012-10-24 | Electronic paper display device and driving method |
US15/008,971 US9886888B2 (en) | 2012-01-09 | 2016-01-28 | Electronic paper display device and driving method |
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CN201210005173.3A CN102654980B (zh) | 2012-01-09 | 2012-01-09 | 电子纸显示器件及驱动方法 |
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US15/008,971 Continuation US9886888B2 (en) | 2012-01-09 | 2016-01-28 | Electronic paper display device and driving method |
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CN103151010B (zh) * | 2013-02-27 | 2014-12-10 | 京东方科技集团股份有限公司 | 一种移位寄存器和显示装置 |
US20170104033A1 (en) * | 2015-10-13 | 2017-04-13 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Array substrate and manufacturing method for the same |
CN107331354B (zh) * | 2017-08-10 | 2019-09-03 | 上海中航光电子有限公司 | 电泳显示面板及其驱动方法和显示装置 |
TWI632538B (zh) * | 2017-09-05 | 2018-08-11 | 友達光電股份有限公司 | 顯示裝置以及驅動方法 |
US10706799B2 (en) * | 2017-12-06 | 2020-07-07 | Au Optronics Corporation | Display device without a driver IC |
CN114730115B (zh) * | 2020-10-22 | 2023-11-14 | 京东方科技集团股份有限公司 | 阵列基板和显示设备 |
CN112904606B (zh) * | 2020-12-28 | 2022-03-04 | 山东蓝贝思特教装集团股份有限公司 | 具备快速电驱动显示功能的双稳态液晶书写装置及方法 |
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US9886888B2 (en) | 2018-02-06 |
US20140071178A1 (en) | 2014-03-13 |
CN102654980B (zh) | 2015-01-14 |
US9311892B2 (en) | 2016-04-12 |
US20160148555A1 (en) | 2016-05-26 |
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