WO2020224152A1

WO2020224152A1 - Driver chip waveform correction method and apparatus, and display panel

Info

Publication number: WO2020224152A1
Application number: PCT/CN2019/106026
Authority: WO
Inventors: 徐枫程
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2019-05-08
Filing date: 2019-09-16
Publication date: 2020-11-12
Also published as: CN110148371B; CN110148371A

Abstract

Disclosed are a driver chip waveform correction method and apparatus, and a storage medium and a display panel. The method comprises the following steps: acquiring a preset first voltage at a high level and a preset second voltage at a low level (S101); setting a threshold voltage according to the first voltage and the second voltage (S102); receiving a timing sequence signal sent by a logic board (S103); and correcting the timing sequence signal according to the threshold voltage (S104), wherein a voltage, less than the threshold voltage, at a moment of the timing sequence signal is regulated to a second voltage, and a voltage, greater than the threshold voltage, at a moment of the timing sequence signal is regulated to a first voltage.

Description

Waveform correction method, device and display panel of drive chip

Technical field

The present invention relates to the field of display technology, and in particular to a method and device for correcting the waveform of a drive chip and a display panel.

Background technique

At present, the 10.5 generation line and the 11 generation line have begun to build, and the panel size is getting larger and larger, and 65 inches, 75 inches, and even 85 inches will gradually spread in the market. As the size increases, the resolution of the product is also increasing, from HD to FHD, FHD to UD, and then to 8K products. As the panel size increases, the size of the signal line becomes longer and longer; the resolution increases, the amount of data increases, and the bit rate transmitted by the driver chip must also increase. High-speed signal transmission over long distances is prone to signal distortion.

For large-size and high-resolution products, the driver chip is used as the receiving end, and the logic board is used as the transmitting end. When the transmitting end transmits signals to the receiving end, the signal received by the remote receiving end will be distorted due to the large size and long transmission path.

Therefore, the existing technology has shortcomings and urgently needs improvement.

technical problem

Technical solutions

The invention provides a method, a device and a display panel for correcting the waveform of a drive chip, which can improve the display quality.

The present invention provides a method for correcting the waveform of a driving chip, which is applied to a large-size display panel. The method includes the following steps: obtaining a preset high-level first voltage and a low-level second voltage; The first voltage and the second voltage set the threshold voltage; receive the timing signal sent by the logic board; correct the timing signal according to the threshold voltage, wherein the timing signal in the timing signal is lower than the threshold voltage The voltage of is adjusted to the second voltage, and the voltage at the time when the timing signal is higher than the threshold voltage is adjusted to the first voltage.

A drive chip waveform correction device applied to a large-size display panel. The drive chip waveform correction device includes: an acquisition module for acquiring a preset high-level first voltage and a low-level second voltage Setting module, used to set the threshold voltage according to the first voltage and the second voltage; receiving module, used to receive the timing signal sent by the logic board; correction module, used to adjust the timing signal according to the threshold voltage The correction is performed, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the voltage at the time when the timing signal is higher than the threshold voltage is adjusted to the first voltage.

A display panel includes a processor and a memory, and a computer program is stored in the memory. The processor is used to execute the drive chip waveform described in any one of the above by calling the computer program stored in the memory Correction method.

Beneficial effect

It can be seen from the above that the present invention obtains a preset high-level first voltage and a low-level second voltage; sets the threshold voltage according to the first voltage and the second voltage; and receives the timing sent by the logic board Signal; the timing signal is corrected according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the timing signal is higher than the threshold voltage The voltage at the moment of is adjusted to the first voltage, thereby completing the correction of the timing signal, which has the beneficial effect of improving the display quality.

Description of the drawings

In order to explain the embodiments or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely inventions For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a flowchart of a method for correcting the waveform of a driver chip in some embodiments of the present invention;

2 is a structural diagram of a driver chip waveform correction device in some embodiments of the present invention;

FIG. 3 is a structural diagram of a display panel in some embodiments of the invention.

The best mode of the invention

The following describes the embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, and cannot be understood as a limitation to the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise" and other directions or The positional relationship is based on the position or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more than two, unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two components or the interaction of two components relationship. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly defined and defined, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

The following disclosure provides many different embodiments or examples for realizing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. In addition, the present invention may repeat reference numerals and/or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and/or the use of other materials.

Please refer to FIG. 1 at the same time. FIG. 1 is a flowchart of a waveform correction method of a driving chip in some embodiments of the present invention. The driving chip waveform correction method is applied to a large-size display panel, and the method includes the following steps:

S101. Obtain a preset high-level first voltage and a low-level second voltage.

For example, the first voltage V1 is set to A, the second voltage is set to -A, and the A is a positive voltage. For example, it can be set to 3.5V.

S102: Set a threshold voltage according to the first voltage and the second voltage.

Wherein, the threshold voltage is between the first voltage and the second voltage. Understandably, in some embodiments, the threshold voltage includes a first threshold voltage and a second threshold voltage, and the first threshold voltage is smaller than the second threshold voltage. The first threshold voltage is (V1+V2)/2-V0, and the second threshold voltage is (V1+V2)/2+V0; wherein, the V1 is the first voltage, the V2 is the second voltage, and the V0 is a preset positive voltage constant value. In this embodiment, the V1 is A, the V2 is -A, and the V0 is 0.1V, where A is a positive voltage greater than 0.1V.

S103: Receive a timing signal sent by the logic board.

Among them, the high level and low level of the initial signal sent by the logic board are A and -A, respectively. Due to the long-distance transmission of the large-size panel, the high level is less than A when it is transmitted to the driver chip. The low level transmission It is less than -A when the drive chip is reached.

S104. Correct the timing signal according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the timing signal is higher than the threshold voltage The voltage at the moment is adjusted to the first voltage.

Wherein, this step S104 specifically includes: comparing the voltage at each moment of the timing signal with the threshold voltage; adjusting the voltage at the moment when the voltage in the timing signal is less than the first threshold voltage to a second voltage ; Adjust the voltage at the time when the voltage in the timing signal is greater than the second threshold voltage to the first voltage. Maintain the voltage at the time when the voltage in the timing signal is between the first threshold voltage and the second threshold voltage.

Of course, it is understandable that in some embodiments, the threshold voltage can be set to 0V, and correspondingly, the high level is A and the low level is -A. The driving chip adjusts the voltage at the moment lower than 0V to -A, and adjusts the voltage at the moment higher than 0V in the timing signal to A.

It can be seen from the above that the present invention obtains a preset high-level first voltage and a low-level second voltage; sets the threshold voltage according to the first voltage and the second voltage; and receives the timing sent by the logic board Signal; the timing signal is corrected according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the timing signal is higher than the threshold voltage The voltage at the moment of is adjusted to the first voltage; thereby completing the correction of the timing signal, which has the beneficial effect of improving the display quality.

Please refer to FIG. 2. FIG. 2 is a structural diagram of a driver chip waveform correction device in some embodiments of the present invention, which is applied to a large-size display panel. The driver chip waveform correction device includes: an acquisition module 201, a setting module 202, and a receiving module. Module 203 and correction module 204.

Wherein, the acquisition module 201 is used to acquire a preset high-level first voltage and a low-level second voltage; for example, the first voltage V1 is set to A, and the second voltage is set to -A, This A is a positive voltage. For example, it can be set to 3.5V.

Wherein, the setting module 202 is used for setting a threshold voltage according to the first voltage and the second voltage; wherein, the threshold voltage is between the first voltage and the second voltage. Understandably, in some embodiments, the threshold voltage includes a first threshold voltage and a second threshold voltage, and the first threshold voltage is smaller than the second threshold voltage. The first threshold voltage is (V1+V2)/2-V0, and the second threshold voltage is (V1+V2)/2+V0; wherein, the V1 is the first voltage, the V2 is the second voltage, and the V0 is a preset positive voltage constant value. In this embodiment, the V1 is A, the V2 is -A, and the V0 is 0.1V, where A is a positive voltage greater than 0.1V.

Wherein, the receiving module 203 is used to receive the timing signal sent by the logic board; wherein, the high level and low level of the initial signal sent by the logic board are A and -A respectively. Due to the long-distance transmission of the large-size panel, the high The level is less than A when transmitted to the driver chip, and the low level is less than -A when transmitted to the driver chip.

Wherein, the correction module 204 is configured to correct the timing signal according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the timing signal The voltage at the moment when it is higher than the threshold voltage is adjusted to the first voltage.

Wherein, the correction module 204 includes: a comparison unit for comparing the voltage at each moment of the timing signal with the threshold voltage; a first adjustment unit for determining that the voltage in the timing signal is less than the first The voltage at the moment of a threshold voltage is adjusted to a second voltage; the second adjustment unit is configured to adjust the voltage at the time of the timing signal when the voltage is greater than the second threshold voltage to the first voltage. The maintaining unit is configured to maintain the voltage at the time when the voltage in the timing signal is between the first threshold voltage and the second threshold voltage.

The present invention also provides a storage medium in which a computer program is stored, and when the computer program runs on a computer, the computer is caused to execute the method described in any one of the above.

3, the present invention also provides a display panel, the display panel includes a processor 301 and a memory 302. Wherein, the processor 301 is electrically connected to the memory 302. The processor 301 is the control center of the display panel. It uses various interfaces and lines to connect the various parts of the entire display panel. It executes the display panel by running or calling the computer program stored in the memory 302 and calling the data stored in the memory 302. The various functions and processing data of the display panel can be monitored as a whole.

In this embodiment, the processor 301 in the display panel will follow the steps below to load the instructions corresponding to the process of one or more computer programs into the memory 302, and the processor 301 will run the instructions and store them in the memory 302. Computer programs to achieve various functions: obtain a preset high-level first voltage and a low-level second voltage; set a threshold voltage according to the first voltage and the second voltage; receive a logic board The timing signal is sent; the timing signal is corrected according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the timing signal is higher than all The voltage at the time of the threshold voltage is adjusted to the first voltage.

It should be noted that those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The storage medium may include, but is not limited to: read only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks, etc.

In summary, although the present invention has been disclosed as above in preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the present invention. Those of ordinary skill in the art can make various modifications without departing from the spirit and scope of the present invention. Such changes and modifications, therefore, the protection scope of the present invention is subject to the scope defined by the claims.

Claims

A method for correcting the waveform of a driving chip applied to a large-size display panel, wherein the method includes the following steps:

Acquiring a preset high-level first voltage and a low-level second voltage;

Setting a threshold voltage according to the first voltage and the second voltage;

Receive the timing signal sent by the logic board;

The timing signal is corrected according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the time when the timing signal is higher than the threshold voltage The voltage of is adjusted to the first voltage.
The method for correcting the waveform of a driving chip according to claim 1, wherein the threshold voltage includes a first threshold voltage and a second threshold voltage, and the first threshold voltage is less than the second threshold voltage; The step of voltage-correcting the timing signal includes:

Comparing the voltage at each moment of the timing signal with the threshold voltage;

Adjusting the voltage at the moment when the voltage in the timing signal is less than the first threshold voltage to a second voltage;

The voltage at the moment when the voltage in the timing signal is greater than the second threshold voltage is adjusted to the first voltage.
The method for correcting the waveform of a driving chip according to claim 1, wherein the step of correcting the timing signal according to the threshold voltage further comprises:

Maintain the voltage at the time when the voltage in the timing signal is between the first threshold voltage and the second threshold voltage.
The method for correcting the waveform of a driver chip according to claim 2, wherein the first threshold voltage is (V1+V2)/2-V0, and the second threshold voltage is (V1+V2)/2+V0; wherein , The V1 is the first voltage, the V2 is the second voltage, and the V0 is the preset positive voltage constant value.
3. The method for correcting the waveform of a driver chip according to claim 2, wherein said V1 is A, said V2 is -A, said V0 is 0.1V, and A is a positive voltage greater than 0.1V.
A drive chip waveform correction device applied to a large-size display panel, wherein the drive chip waveform correction device includes:

An acquiring module for acquiring a preset high-level first voltage and a low-level second voltage;

A setting module, configured to set a threshold voltage according to the first voltage and the second voltage;

The receiving module is used to receive the timing signal sent by the logic board;

The correction module is configured to correct the timing signal according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the timing signal is higher than the threshold voltage. The voltage at the time of the threshold voltage is adjusted to the first voltage.
7. The driver chip waveform correction device according to claim 6, wherein the threshold voltage comprises a first threshold voltage and a second threshold voltage, the first threshold voltage is smaller than the second threshold voltage; the correction module comprises:

A comparison unit, configured to compare the voltage at each moment of the timing signal with the threshold voltage;

The first adjustment unit is configured to adjust the voltage at the moment when the voltage in the timing signal is less than the first threshold voltage to a second voltage;

The second adjustment unit is configured to adjust the voltage at the moment when the voltage in the timing signal is greater than the second threshold voltage to the first voltage.
The driver chip waveform correction device according to claim 6, wherein the correction module further comprises:

The maintaining unit is configured to maintain the voltage at the time when the voltage in the timing signal is between the first threshold voltage and the second threshold voltage.
8. The driver chip waveform correction device according to claim 7, wherein the first threshold voltage is (V1+V2)/2-V0, and the second threshold voltage is (V1+V2)/2+V0; wherein , The V1 is the first voltage, the V2 is the second voltage, and the V0 is the preset positive voltage constant value.
8. The driver chip waveform correction device according to claim 7, wherein said V1 is A, said V2 is -A, said V0 is 0.1V, wherein A is a positive voltage greater than 0.1V.
A display panel includes a processor and a memory, and a computer program is stored in the memory, and the processor calls the computer program stored in the memory to execute the following steps:

Acquiring a preset high-level first voltage and a low-level second voltage;

Setting a threshold voltage according to the first voltage and the second voltage;

Receive the timing signal sent by the logic board;

The timing signal is corrected according to the threshold voltage, wherein the voltage at the time when the timing signal is lower than the threshold voltage is adjusted to the second voltage, and the time when the timing signal is higher than the threshold voltage The voltage of is adjusted to the first voltage.
11. The display panel of claim 11, wherein the threshold voltage comprises a first threshold voltage and a second threshold voltage, and the first threshold voltage is less than the second threshold voltage; When the threshold voltage corrects the timing signal, it is used to achieve:

Comparing the voltage at each moment of the timing signal with the threshold voltage;

Adjusting the voltage at the moment when the voltage in the timing signal is less than the first threshold voltage to a second voltage;

The voltage at the moment when the voltage in the timing signal is greater than the second threshold voltage is adjusted to the first voltage.
11. The display panel according to claim 11, wherein, when the processor implements the correction of the timing signal according to the threshold voltage, the processor is configured to implement:

Maintain the voltage at the time when the voltage in the timing signal is between the first threshold voltage and the second threshold voltage.
13. The display panel of claim 12, wherein the first threshold voltage is (V1+V2)/2-V0, and the second threshold voltage is (V1+V2)/2+V0; wherein, the V1 Is the first voltage, the V2 is the second voltage, and the V0 is the preset positive voltage constant value.
11. The display panel of claim 12, wherein said V1 is A, said V2 is -A, and said V0 is 0.1V, wherein A is a positive voltage greater than 0.1V.