CN220731152U

CN220731152U - Electronic paper display device, display panel and display device

Info

Publication number: CN220731152U
Application number: CN202322133396.4U
Authority: CN
Inventors: 何维; 胡自萍
Original assignee: Jiangxi Xingtai Technology Co Ltd
Current assignee: Jiangxi Xingtai Technology Co Ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2024-04-05
Anticipated expiration: 2033-08-09

Abstract

An electronic paper display device, a display panel, and a display device, wherein the electronic paper display device includes: t pixel driving chips; the electronic paper comprises K1 row and K2 column display arrays, wherein K1 multiplied by K2 is equal to T, and each display array comprises N multiplied by M pixel units; the pixel driving chip comprises N rows of grid driving signal outputs and M columns of source driving signal outputs; n gate driving signal lines, each of which is electrically connected to gate signal input terminals of one or more rows of pixel units; each source electrode driving signal of the pixel driving chip outputs source electrode signals for driving N pixel units; the signal input lines of the T pixel driving chips are connected in series end to end, and external data are input into the T pixel driving chips through the serial connection; the gate driving signal lines drive one or more rows of pixel units at a time to perform a display operation. Resolution limitations can be broken through based on the existing driver I C, and higher resolution displays can be driven based on the existing driver I C.

Description

Electronic paper display device, display panel and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to an electronic paper display device, a display panel and a display device.

Background

TFT electronic paper displays are also a type of active matrix liquid crystal display device. Each pixel point on the TFT display is driven by a thin film transistor integrated therein; and arranging a corresponding thin film transistor at each pixel point to form a thin film transistor array. The driving of the thin film transistor array is to integrate gate driving inside the IC onto an array substrate (TFT Glass). The electronic paper particles are driven by continuously applying a voltage of a driving waveform to each pixel point through the driving IC chip, so that the effect of displaying images is achieved. The electronic paper driving waveform is mainly composed of the timing sequence of gate voltage, source voltage, VCOM voltage and refresh frequency of the TFTs. GOA (Gate On Array), alternatively referred to as GIP (Gate In Panel), is to integrate the gate drive inside the IC onto the TFT array glass.

Fig. 10 is a schematic diagram of GOA units, each GOA unit can implement a shift register-like function, and Gate can be opened step by step after being cascaded together. In the initial stage, all levels of GOA units are not output. When the initial trigger signal STP is sent to the first stage GOA unit, the GOA outputs a first row gate driving signal G1, and the first row gate driving signal G1 is delayed by one clock pulse width from the initial trigger signal STP. The first row gate drive signal G1 will turn on the first row pixel TFTs, writing the corresponding first row Source signals to the pixels; while the first row gate drive signal G1 will trigger the next stage GOA operation. When the present row needs to be turned off, the next GOA starts outputting the third row gate driving signal G3, and the third row gate driving signal G3 is fed back to turn off the first row gate driving signal G1. The last level 1 GOA is switched off by the Dummy GOA thereafter. This technique has some problems when applied to electronic paper panels. For example, the driver IC of the electronic paper writes the whole graphic data into the IC register, so that the size of the data written each time is limited, the number of GOA stages is limited, and therefore the resolution of the product is limited. The resolution on a display screen depends on the number of pixel points, and the number of pixel points which can be driven is limited by the data size of a driving IC; how to break through the transmission limit of the IC data size based on the existing driving IC, so that increasing the resolution on one display screen, i.e. increasing the number of pixels on one display screen, is a problem to be solved.

The conventional GOA design is a driver IC for LCD (Liquid Crystal Display liquid crystal) products in a certain direction, since the source signal is written every row gate is on, the GOA cells can be of no limited number of stages.

In order to save power, the electronic paper IC writes the entire image data into the IC register at once. For example, the IC maximum resolution is 960×1280, and the single IC maximum support image is limited to 960×1280, and the number of stages cannot exceed 1280 even if Gate employs GOA.

How to use an electronic paper IC with the maximum resolution of fixed resolution to drive the IC to drive the electronic paper with the resolution above the greater resolution breaks through the limitation of the maximum supported image resolution of a single IC. Such as how to drive 2880×2160 products with a maximum resolution of 960×1080. As another example, how to drive a product with a resolution 2880×2560 using electronic paper ICs with a maximum resolution of 960×1280.

Noun interpretation: EPD is an abbreviation for english "electronic paper display", and chinese meaning is electronic paper display.

TFT is an abbreviation of English "Thin Film Transistor", and Chinese meaning thin film field effect transistor; each pixel on the TFT display is driven by a thin film transistor integrated therein.

ITO is an abbreviation for the english "Indium Tin Oxide" and chinese meaning Indium Tin Oxide. In the application, the electronic paper ITO refers to a conductive film layer material of transparent conductive film shielding glass, and mainly comprises an ITO (indium tin oxide semiconductor) film.

Disclosure of Invention

The technical problem to be solved by the application is to avoid the defect that the display abnormality occurs in the picture due to the large-area blank of the pixel electrode in the prior art, and provide the electronic paper with small blank of the pixel electrode area.

The technical scheme of this application solution above-mentioned technical problem is an electronic paper display device, includes: electronic paper, T pixel driving chips and grid GOA driving modules; the electronic paper comprises K1 row and K2 column display arrays, the pixel driving chip drives the display arrays, K1 times K2 are equal to T, and each display array comprises N times M pixel units; the pixel driving chip comprises grid GOA signal output and M column source electrode driving signal output; the grid GOA signal is electrically connected with the grid GOA driving module; the grid GOA driving module comprises grid driving signal lines, and grid signal input ends of one or more rows of pixel units of each grid driving signal line are electrically connected; each source electrode driving signal of the pixel driving chip outputs source electrode signals for driving N pixel units; the signal input lines of the T pixel driving chips are connected in series end to end, and external data is input into the T pixel driving chips through the serial connection; the gate driving signal lines drive one or more rows of pixel units at a time to perform a display operation.

The pixel driving chips are distributed above and below the display array, and K1 is equal to 2: each pixel driving chip drives the adjacent display array, and the source signal input end of each pixel unit is electrically connected with one source driving signal line.

The pixel driving chip outputs a grid GOA signal and is electrically connected with the grid GOA driving module.

The serial order of the pixel drive chips is a surrounding series around the display array.

The pixel driving chips are distributed above and below the display array, each pixel unit is provided with two or more source driving signals passing through, and the source signal input end of each pixel unit is electrically connected with one source driving signal line.

The source signal line output from the pixel driving chip is connected to the source signal of the display array through the hole.

The electronic paper display device also comprises a graphic driving module; the graphic driving module comprises a serial data output interface and an image data input interface, and converts externally input image data into serial data for output.

The electronic paper display device also comprises a wireless communication module, wherein the wireless communication module is in electric signal connection with the graphic driving module, and the image data is obtained through the wireless communication module.

The technical scheme for solving the technical problem can also be a display panel, comprising the electronic paper display device.

The technical scheme for solving the technical problem can also be a display device, comprising the display panel.

The electronic paper pixel driving chip has the advantages that products with larger resolution can be driven by using the electronic paper pixel driving chip with smaller maximum resolution, and the problem that the resolution of the electronic paper products is limited by the resolution of the pixel driving chip is broken through.

The multi-chip driving circuit has the beneficial effects that the multi-chip combination mode is used for driving, so that the resolution of a product is improved, driving wiring is simpler, and wiring of driving signals of each chip corresponding to each region is reduced when a plurality of chips are driven. On one hand, the wiring cost is reduced, the space occupied by wiring is also saved, and the use efficiency of the space cannot be improved.

Drawings

FIG. 1 is a schematic diagram of an electronic paper display device according to an embodiment 1;

FIG. 2 is a second schematic diagram of an embodiment 1 of an electronic paper display device;

FIG. 3 is a schematic diagram of an electronic paper display device according to example 2;

FIG. 4 is a second schematic diagram of an embodiment 2 of an electronic paper display device;

FIG. 5 is a schematic diagram of embodiment 3 of an electronic paper display device;

FIG. 6 is a second schematic diagram of embodiment 3 of an electronic paper display device;

FIG. 7 is a schematic view of embodiment 4 of an electronic paper display device;

fig. 8 is a schematic diagram of a TFT driving unit of a single pixel in the related art;

FIG. 9 is a schematic diagram of a prior art pixel drive chip connected to a pixel;

fig. 10 is a schematic diagram of connection of a plurality of pixel driving chips in the prior art.

Detailed Description

Embodiments of the present application are described in further detail below in conjunction with the various figures.

It should be noted that the following description is a description of the preferred embodiments of the present application, and is not meant to limit the present application. The description of the preferred embodiments of the present application is provided only as an illustration of the general principles of the present application. The embodiments described in this application are only some, but not all, of the embodiments of this application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and technical features numbered with numerals such as Arabic numerals 1, 2, 3, etc., and such numbers as "A" and "B" are used for descriptive purposes only and are not intended to represent a temporal or spatial sequential relationship for ease of illustration; and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second", and numbered with numerals 1, 2, 3, etc., may explicitly or implicitly include one or more such features. In the description of the present application, the meaning of "a number" is two or more, unless explicitly defined otherwise.

As shown in fig. 8, which is a schematic diagram of a TFT driving unit for a single pixel in the prior art, there are 4 pixel units, each pixel unit is provided with a corresponding thin film transistor, and the thin film transistor includes three terminals, namely, a source electrode, a gate electrode and a drain electrode, and operates as a single switch. Each thin film transistor requires two control pins, one of which is a Gate pin and one of which is a source Gate pin. As shown in fig. 8, the Gate pins of a row are electrically connected by a conductive line G1; the source gate pins of a column are electrically connected through a lead D1; the control pixel unit operates the source Gate pins of the pixels of a row by selecting the Gate pins of the row at a time.

As shown in fig. 9, when the pixel driving chip drives a plurality of pixels, the number of data bits of the pixel driving chip is limited, and the maximum support image of a single pixel driving chip is limited. How to drive 2880×2160 products with a maximum resolution of 960×1080 is done by using two drive ICs of 960×1080, the conventional practice is to drive 2880×2160 products. As shown in fig. 10, a plurality of pixel driving chips are used, each pixel driving chip drives a block, each pixel driving chip correspondingly performs corresponding wiring to control a Gate pin and a source Gate pin of each pixel in a driving area, so that each driven area needs to perform corresponding wiring independently, 960×1080 pixels need 960 electric connection lines for row driving, and 1080 electric connection lines for column driving; two adjacent pixel areas all need so many lines respectively, and every region is wired on the one hand to have increased wiring cost, also need occupation space, and space's use efficiency is not high.

As shown in fig. 1 and 2, an embodiment of an electronic paper display device includes: electronic paper, T pixel driving chips and grid GOA driving modules; the electronic paper comprises K1 row and K2 column display arrays, the pixel driving chip drives the display arrays, K1 times K2 are equal to T, and each display array comprises N times M pixel units; the pixel driving chip comprises N rows of grid driving signal outputs and M columns of source driving signal outputs; the liquid crystal display device comprises N grid driving signal lines, wherein each grid driving signal line is connected with T rows of pixel units in series; each source electrode driving signal of the pixel driving chip drives source electrode signals of N pixel units; the signal input lines of the T pixel driving chips are connected in series end to end, and external data is input into the T pixel driving chips through the serial connection; each time the gate driving signal line drives one or more rows of pixel units to perform display operation, the gate GOA driving module includes a gate GOA driving module L and a gate GOA driving module R, the gate GOA driving module L is located at the left side of the display array, and the gate GOA driving module R is located at the right side of the display array.

Referring to fig. 1 and 2, in an embodiment of an electronic paper display device, T is 6, K1 is 3, and K2 is 2. If the 6 pixel driving chips are all pixel driving chips with the maximum resolution of 960×1080, the display arrays with the maximum resolution of 960×1080 can be driven, and the resolution can be improved to 6 times of the original resolution. For ease of illustration in fig. 1, 960×1080 pixels in a single display array are not illustrated, but 4×5 pixels are symbolically illustrated.

As shown in fig. 1 and 2, the pixel driving chip outputs a gate GOA signal and is electrically connected to the gate GOA driving module, and the gate GOA driving module outputs a gate driving signal to drive the T rows of pixel units in the K1 row and K2 column display array, so that each gate driving signal line can be controlled by the gate driving signal output of one gate GOA driving module. In the K1 row and K2 column display arrays, M column source electrode driving signals of M pixel units in each display array are still respectively output by each pixel driving chip.

The embodiments shown in fig. 1, 2 and 7 solve the problem of limited resolution when the GOA is adopted in the electronic paper product; with the designs of fig. 1, 2 and 7, three pixel driving chips ICs are respectively disposed at the upper and lower ends of the display area to respectively drive the upper and lower half areas. Thus, the maximum gate level can be 2 times of the pixel driving chip; if the gate level of the single pixel driving chip is 1080, the maximum gate level of the target area may be 1080×2=2160.

As shown in fig. 1, in a state where the first row gate driving signal is turned on, two rows of pixel units are driven for the pixel units; fig. 2 is a state where the second row gate driving signal is on; for the pixel cells, two other rows of pixel cells are driven.

In some embodiments of the electronic paper display device not shown in the drawings, the pixel driving chips are distributed above and below the display array, and K1 is equal to 2: each pixel driving chip drives the adjacent display array, and each pixel unit is serially connected with a source driving signal.

In the embodiment of the electronic paper display device of fig. 1 and 2, the serial order of the pixel drive chips is a surrounding series around the display array.

In the embodiment of the electronic paper display device shown in fig. 1 and 2, the gate GOA driving module is directly disposed on the TFT substrate by GOA technology, because the GOA units are unidirectional progressive signals, the new design requires that the initial GOA units be placed at the junction between the upper and lower display areas, and the upper GOA units are progressive signals from the middle to the upper. The lower GOA unit signals line by line down from the middle.

In the embodiment of the electronic paper display device shown in fig. 3 to 4, the pixel driving chips are distributed below the display array or on one side below the display array, each pixel unit has two or more source driving signals passing through it, and the source signal input terminal of each pixel unit is electrically connected to one of the source driving signal lines.

In the embodiments of the electronic paper display device shown in fig. 3 to 4, the source signal lines output from the pixel driving chips are connected to the source signals of the display array through the holes.

In fig. 3, the gate GOA driving module includes two modules, namely an odd line of the gate GOA driving module and an even line of the gate GOA driving module, which respectively drive the odd line and the even line; the odd numbered pixel driving chips 11, 13, 15 source driving signals drive the odd numbered rows; the even numbered pixel driving chips 12, 14, 16 drive the even numbered rows by the source driving signals. In fig. 3, a first row and a second row in the display array are driven. In fig. 4, the third and fourth rows in the display array are driven.

In the embodiment of the electronic paper display device of fig. 5 to 6, the pixel driving chips are distributed on one side above or below the display array, each pixel unit has two or more source driving signals passing through, and the source signal input terminal of each pixel unit is electrically connected to one of the source driving signal lines.

In fig. 5, the source driving signals of the pixel driving chips 11 numbered as an odd number drive odd-numbered rows of the first, second, and third columns; the source driving signals of the pixel driving chips 12 numbered as an even number drive even rows of the fourth, fifth and third columns. In fig. 5, the gate GOA driving module drives the first and second rows of the display array simultaneously, and the color blocks of different fills are driven by different pixel driving chips. In fig. 6, the second row gate driving signals of the gate GOA driving module are output, and drive the third row and the fourth row in the display array, in which the color blocks with different fills are driven by different pixel driving chips.

The embodiment of the electronic paper display device as shown in fig. 1 to 7 further comprises a graphic driving module; the graphic driving module comprises a serial data output interface and an image data input interface, and converts externally input image data into serial data for output.

In some embodiments of the electronic paper display device not shown in the drawings, the electronic paper display device further comprises a wireless communication module, wherein the wireless communication module is in electrical signal connection with the graphic driving module, and the image data is obtained through the wireless communication module.

In some embodiments of a display panel not shown in the drawings, the electronic paper display device described above is included.

In some embodiments of a display device not shown in the drawings, the display device includes the display panel described above.

In the embodiment of the electronic paper display device shown in fig. 3 and 4, the left and right GOA units are respectively driven by odd-numbered rows and even-numbered rows, the IC1 is connected to the S1/S3/S5 … … S1919 and is synchronous with the GOA timing of the odd-numbered rows, the IC2 is connected to the S2/S4/S6 … … S1920 and is synchronous with the GOA timing of the even-numbered rows, the S1/S3/S5 … … S1919 is connected to the pixels of the odd-numbered rows, the S2/S4/S6 … … S1920 is connected to the pixels of the even-numbered rows, the S1/S2 drives the pixels of the first column, and the S3/S4 drives the pixels of the second column … … S1919/S1920 to drive the pixels of the 960 column. Thus, IC1 and IC2 collectively drive a display area having a resolution of 960×2560.

As in the embodiment of the electronic paper display device of fig. 5 and 6, every two rows of Gate lines are connected and simultaneously connected to the left and right GOA units, for example, GOA unit Gout1 drives row 1/2 Gate, GOA unit Gout2 drives row 3/4 Gate … … GOA unit Gout1280 drives row 2559/2560 Gate. IC1 connects S1/S3/S5 … … S1919, IC2 connects S2/S4/S6 … … S1920, and S1/S3/S5 … … S1919 connects only odd row pixels, S2/S4/S6 … … S1920 connects only even row pixels, S1/S2 drives the first column of pixels, S3/S4 drives the second column of pixels … … S1919/S1920 drives the 960 th column of pixels. Thus, IC1 and IC2 collectively drive a display area having a resolution of 960×2560. IC3/IC4 and IC5/IC6 are connected in the same way. The use of the design of FIG. 3 versus the design of FIG. 2 reduces the problem of display non-uniformity caused by the far-end signal attenuation of the gate line.

The gate line number of the GOA electronic paper board is expanded by adopting a partition driving mode of a plurality of pixel driving chips, so that the maximum resolution limit of the IC can be exceeded, the IC binding is kept at the same side, and the difficulty of the binding process is reduced.

An electronic paper display device, a display panel, and a display device, wherein the electronic paper display device includes: t pixel driving chips; the electronic paper comprises K1 row and K2 column display arrays, wherein K1 multiplied by K2 is equal to T, and each display array comprises N multiplied by M pixel units; the pixel driving chip comprises N rows of grid driving signal outputs and M columns of source driving signal outputs; n gate driving signal lines, each of which is electrically connected to gate signal input terminals of one or more rows of pixel units; each source electrode driving signal of the pixel driving chip outputs source electrode signals for driving N pixel units; the signal input lines of the T pixel driving chips are connected in series end to end, and external data are input into the T pixel driving chips through the serial connection; the gate driving signal lines drive one or more rows of pixel units at a time to perform a display operation. The resolution limit can be broken through based on the existing driving IC, and the display screen with higher resolution can be driven based on the existing driving IC.

As shown in fig. 1 to 7, the foregoing embodiments are merely examples of the present application, and are not limited to the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the application are included in the scope of the patent application.

Claims

1. An electronic paper display device is characterized in that,

comprising the following steps: electronic paper, T pixel driving chips and grid GOA driving modules;

the electronic paper comprises K1 row and K2 column display arrays, the pixel driving chip drives the display arrays, K1 times K2 are equal to T, and each display array comprises N times M pixel units;

the pixel driving chip comprises grid GOA signal output and M column source electrode driving signal output; the grid GOA signal is electrically connected with the grid GOA driving module;

the grid GOA driving module comprises grid driving signal lines, and grid signal input ends of one or more rows of pixel units of each grid driving signal line are electrically connected;

each source electrode driving signal of the pixel driving chip outputs source electrode signals for driving N pixel units;

the signal input lines of the T pixel driving chips are connected in series end to end, and external data is input into the T pixel driving chips through the serial connection;

the gate driving signal lines drive one or more rows of pixel units at a time to perform a display operation.

2. The electronic paper display device of claim 1, wherein,

3. The electronic paper display device according to claim 2, wherein,

4. The electronic paper display device according to claim 2, wherein,

5. The electronic paper display device of claim 1, wherein,

6. The electronic paper display device of claim 5, wherein,

7. The electronic paper display device of claim 1, wherein,

the device also comprises a graph driving module; the graphic driving module comprises a serial data output interface and an image data input interface, and converts externally input image data into serial data for output.

8. The electronic paper display device of claim 7, wherein,

the image display device further comprises a wireless communication module, wherein the wireless communication module is in electric signal connection with the image driving module, and image data are obtained through the wireless communication module.

9. A display panel, comprising: the electronic paper display device of any one of claims 1 to 8.

10. A display device comprising the display panel according to claim 9.