WO2020135072A1 - Dispositif d'affichage, procédé et appareil de commande associés - Google Patents

Dispositif d'affichage, procédé et appareil de commande associés Download PDF

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Publication number
WO2020135072A1
WO2020135072A1 PCT/CN2019/124863 CN2019124863W WO2020135072A1 WO 2020135072 A1 WO2020135072 A1 WO 2020135072A1 CN 2019124863 W CN2019124863 W CN 2019124863W WO 2020135072 A1 WO2020135072 A1 WO 2020135072A1
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WO
WIPO (PCT)
Prior art keywords
driver
display device
amplitude
signal generator
differential signal
Prior art date
Application number
PCT/CN2019/124863
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English (en)
Chinese (zh)
Inventor
王明良
Original Assignee
惠科股份有限公司
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Publication date
Application filed by 惠科股份有限公司 filed Critical 惠科股份有限公司
Publication of WO2020135072A1 publication Critical patent/WO2020135072A1/fr

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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

Definitions

  • the present application relates to the field of display technology, in particular to a display device control method, a display device control device, and a display device.
  • the amplitude of differential signals transmitted in differential traces is generally a fixed value. Since the distance between the driver and the control unit that emits the differential signal is different, if the amplitude is set too small, the remote driver may have problems with data reception. If the amplitude is set too large, the electromagnetic radiation of the display device may be exceeded.
  • the main purpose of the present application is to provide a display device control method, which aims to ensure the quality of data received by the driver while reducing the generated electromagnetic radiation.
  • the present application provides a display device control method, which is applied to a display device.
  • the display device includes a pixel array, a driver, and a signal generator connected to the driver.
  • the pixel array includes a plurality of array arrangements. Each pixel unit is connected to the driver, the signal generator is configured to output an image differential signal to the driver, and the display device control method includes the following steps:
  • a display device control method proposed in an embodiment of the present application is applied to a display device including a pixel array, a driver, and a signal generator connected to the driver.
  • the distance parameter can characterize the driver
  • the distance from the signal generator is adjusted according to the amplitude of the image differential signal determined by the distance parameter. It can be adapted to different drivers from the distance of the signal generator to make adaptive adjustments.
  • the signal generator outputs the image according to the determined amplitude Differential signal to the driver, the determined amplitude can make the driver of different distances can receive the complete image differential signal without generating a lot of electromagnetic radiation.
  • FIG. 1 is a schematic diagram of a hardware distribution structure of a display device related to an embodiment of the present application
  • FIG. 2 is a schematic diagram of the hardware structure of the display device control device in FIG. 1;
  • FIG. 3 is a schematic flowchart of a first embodiment of a display device control method of this application.
  • FIG. 4 is a schematic flowchart of a second embodiment of a display device control method of this application.
  • FIG. 5 is a schematic flowchart of a third embodiment of a display device control method of this application.
  • FIG. 6 is a schematic flowchart of a fourth embodiment of a display device control method of this application.
  • the main solution of the embodiments of the present application is to propose a display device control method, which is applied to a display device.
  • the display device includes a pixel array, a driver 100 and a signal generator 200 connected to the driver 100
  • the pixel array includes a plurality of pixel units 01 arranged in an array, each of the pixel unit 01 and the driver 100 connection
  • the signal generator 200 is configured to output an image differential signal to the driver 100
  • the method includes: acquiring a distance parameter between the driver 100 and the signal generator 200; determining the image according to the distance parameter The amplitude of the differential signal; controlling the signal generator 200 to output the image differential signal according to the amplitude.
  • the present application provides the above solution to ensure the quality of data received by the driver 100 while reducing the electromagnetic radiation generated.
  • the display device may be a liquid crystal display device.
  • the display device includes a pixel array, a driver 100, a signal generator 200 connected to the driver 100, and a display device control device 300 connected to the signal generator 200.
  • the driver 100 may specifically include a source driver and a gate driver.
  • the display device may be divided into a driving area 1 and a fan-out area 2.
  • the signal generator 200, the driver 100, and the display device control device 300 may be disposed in the driving area 1, and the pixel array is disposed in the fan-out area 2.
  • the pixel array includes a plurality of pixel units 01 arranged in an array, and each pixel unit 01 is connected to the driver 100.
  • the display device further includes a plurality of source lines 02 and a plurality of gate lines 03.
  • a plurality of gate lines 03 are distributed in the fan-out area 2 and are connected to the gate driver in the driving area 1, and a plurality of source lines 02 are distributed in the fan-out area 2 and are spaced apart from the source driver in the driving area 1 connection.
  • a plurality of source lines 02 and a plurality of gate lines 03 are arranged orthogonally.
  • the gate line 03 extends laterally (forms a row), and the source line 02 extends longitudinally (forms a column), defining the intersection of the gate line 03 and the source line 02 as a pixel, each pixel is provided with a pixel
  • the unit 01 forms a pixel array.
  • the pixel unit 01 may specifically be a thin film transistor.
  • the source of each thin film transistor is connected to the source driver through the source line 02, and the gate of each thin film transistor is connected to the gate driver through the gate line 03.
  • the gate driver sends a gate driving signal to the gate of the thin film transistor through the gate line 03 to turn on the thin film transistors on the pixel array in sequence.
  • each gate driving signal specifically includes the selected target pixel unit 01 and the turn-on signal of the target pixel unit 01.
  • the source driver sends the driving voltage corresponding to the pixel where the thin film transistor is located to the source of the thin film transistor through the source line 02.
  • the brightness of the pixels is controlled by the voltage difference between the driving voltage and the common voltage of the common electrode of the display device, thereby realizing the display of the image on the display device.
  • the signal generator 200 can receive the image data to be displayed and convert the image data into an image differential signal.
  • the signal generator 200 can convert the image data into image differential signals with different amplitudes and different frequencies.
  • the image differential signal is image data transmitted in a differential signal format.
  • the signal generator 200 outputs the generated image differential signal to the source driver. After receiving the image differential signal, the source driver can extract the image data therein, and form a corresponding driving voltage to drive the pixels to emit light according to the image data.
  • One or more source drivers may be specifically provided. When there are multiple source drivers, each source driver can correspond to one or more columns of thin film transistors in the fan-out region 2 and provide a driving voltage for it.
  • One signal generator 200 may be correspondingly connected to multiple source drivers through differential traces. There may be more than one signal generator 200, and each signal generator 200 is connected to at least two source drivers, and provides corresponding image differential signals for the source drivers connected thereto.
  • the signal generator 200 can sequentially transmit the image differential signal to each source driver.
  • Each source driver sequentially captures the image data in the image differential signal.
  • the display device control apparatus 300 specifically includes: a processor 3001 such as a CPU, a memory 3002, a data interface 3003, and a communication bus 3004.
  • the communication bus 3004 is used to implement connection communication between these components.
  • the memory 3002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as disk storage.
  • the memory 3002 may optionally be a storage device independent of the foregoing processor 3001.
  • the processor 3001 may be connected to the signal generator 200 described above to control the operation of the signal generator 200.
  • the data interface 3003 can be used to connect with a module that provides a distance parameter to obtain the distance parameter.
  • the distance parameter may include an ordinal number corresponding to a pixel column
  • the module for providing the distance parameter may specifically be a column counter 400 in a timing control chip of a liquid crystal display device.
  • the fan-out area 2 of the display device includes N columns of pixel units 01 connected by the source line 02
  • the column calculator counts up from 0 to N in order, and the value is formed by the same column of pixel units 01 that needs to be driven currently The ordinal number of the pixel column.
  • the data interface 3003 can be communicatively connected with the column counter 400, read the ordinal number of the current pixel column and provide it to the processor 3001.
  • FIG. 2 does not constitute a limitation on the device, and may include more or less components than those illustrated, or combine certain components, or have different component arrangements.
  • the memory 3002 as a readable storage medium may include a display device control program.
  • the processor 3001 may be used to call the display device control program stored in the memory 3002 and perform operations related to the steps of the display device control method in the following embodiments.
  • an embodiment of the present application also provides a readable storage medium on which a display device control program is stored, and the display device control program is executed by the processor 3001 related to the display device control method in the following embodiments Steps of operation.
  • an embodiment of the present application provides a display device control method.
  • the display device control method includes:
  • Step S10 Obtain the distance parameter between the driver 100 and the signal generator 200;
  • the driver 100 here may specifically include a source driver that supplies a driving voltage to the pixel unit 01.
  • the distance parameter is a value characterizing the distance between the driver 100 and the signal generator 200.
  • the distance parameter may include the distance value directly measured between the driver 100 and the signal generator 200, the greater the distance value, the greater the distance between the driver 100 and the signal generator 200; the distance parameter may also include the driver 100 and the signal generation The value of the length of the signal line connected between the devices 200, etc., the greater the value of the length of the signal line, the greater the distance between the driver 100 and the signal generator 200.
  • the position of the driver 100 and the signal generator 200 is fixed, and since the position of the driver 100 is generally set corresponding to the pixel area formed by the pixel column under its control, in order to reduce the length of the wiring and avoid the signal line Interfere with each other. Therefore, the ordinal number of the pixel column can be used to characterize the location of the source driver connected to the pixel unit 01 in the pixel column.
  • the distance parameter may also include the ordinal number of pixel columns to be driven.
  • the number of the pixel column formed by the pixel unit 01 corresponding to the reference driver 100 is taken as the reference number, and the distance value between the driver 100 and the signal generator 200 is taken as the reference distance, If the number of pixel columns is larger than the reference number, the distance between the driver 100 and the signal generator 200 is larger than the reference distance; if the number of pixel columns is smaller than the reference number, the driver 100 and the signal generator are smaller The distance between 200 is smaller relative to the reference distance.
  • the driver 100 closest to the signal generator 200 may be selected as the reference driver 100.
  • Step S20 Determine the amplitude of the image differential signal according to the distance parameter
  • Different distance parameters correspond to different amplitudes of image differential signals. Specifically, the greater the distance between the driver 100 and the signal generator 200 characterized by the distance parameter, the greater the amplitude of the corresponding image differential signal; the distance between the driver 100 and the signal generator 200 characterized by the characteristic parameter The smaller, the smaller the amplitude of the corresponding image differential signal.
  • the correspondence between the distance parameter and the amplitude may include forms such as tables and formulas.
  • a distance parameter or a range of values related to the distance parameter corresponds to the amplitude of an image differential signal.
  • step S30 the signal generator 200 is controlled to output the image differential signal according to the amplitude.
  • the signal generator 200 can adjust the output current so that the amplitude of the output image differential signal is the amplitude determined according to the distance parameter. In addition, the signal generator 200 can also adjust the output voltage, output power, etc. so that the output image differential signal reaches the above-mentioned amplitude.
  • a display device control method is proposed, which is applied to a driver 100 and a signal generator 200 connected to the driver 100.
  • the distance parameter can characterize the driver
  • the distance between 100 and the signal generator 200 can be adaptively adjusted according to the magnitude of the image differential signal determined by the distance parameter to the driver 100 that is different from the distance of the signal generator 200, and the signal generator 200 is determined according to the Amplitude of the output image differential signal to the driver 100, the determined amplitude can make the driver 100 different distances can receive the complete image differential signal without generating a lot of electromagnetic radiation.
  • one signal generator 200 is connected to at least two of the drivers 100, and the signal generator 200 is configured to sequentially output image differential signals to each of the drivers 100.
  • the display device control method also includes the following steps:
  • Step S00 it is determined that the driver 100 currently receiving the image differential signal is the target driver 100;
  • the signal generator 200 successively outputs image differential signals to the respective drivers 100.
  • the driver 100 currently receiving the image differential signal is regarded as the target driver 100.
  • the driving order of each driver 100 may be set in advance, and the display device control device 300 sequentially uses the driver 100 as the target driver 100 according to the driving order.
  • at least two drivers 100 each include a source driver that provides a driving voltage for the pixel unit 01.
  • the driver 100 that currently needs to receive the image differential signal can send a data request to the display device control device 300 according to the driving order, and the display device control device 300 can determine the corresponding driver 100 as the target driver 100 according to the received data request.
  • step S00 may further include:
  • Step S01 Obtain the ordinal number of the pixel column to be driven currently
  • the number of pixel columns currently required to be driven can be obtained by acquiring the current count value of the column counter 400 in the timing control chip of the liquid crystal display device.
  • step S02 the driver 100 corresponding to the ordinal number of the pixel column is determined as the target driver 100.
  • each driver 100 has an ordinal number of pixel columns corresponding thereto.
  • the pixel unit 01 in the pixel column with an ordinal number of 0-320 can be connected to the first driver 100, and the first driver 100 provides a driving voltage
  • the pixel units 01 in the pixel rows with the serial numbers of 321-340 can be connected to the second driver 100, and the second driver 100 provides the driving voltage
  • the pixel units 01 in the pixel rows with the serial numbers of 641-960 can be connected with the third driver 100 Connected, the driving voltage is provided by the third driver 100. Therefore, after acquiring the ordinal number of the pixel column currently required to be driven, the driver 100 corresponding to the ordinal number of the pixel column is the driver 100 currently receiving the image differential signal, and this driver 100 is used as the target driver 100.
  • the display device control apparatus 300 can automatically recognize the driver 100 currently receiving the image differential signal as the target driver 100, and based on this, adaptively adjust the signal according to the distance parameter between the target driver 100 and the signal generator 200 The amplitude of the image differential signal output from the generator 200 to the target driver 100.
  • Step S11 Obtain the distance parameter between the target driver 100 and the signal generator 200;
  • Step S21 Determine the amplitude of the image differential signal according to the distance parameter
  • step S31 the signal generator 200 is controlled to output the image differential signal to the target driver 100 according to the amplitude.
  • step S11 For the specific execution steps of step S11, step S21, and step S31 here, reference may be made to the above steps S10, S20, and S30, and details are not described herein.
  • the display device is provided with at least two drivers 100 connected to the signal generator 200, and the amplitude of the image differential signal received by each driver 100 can be adapted to the difference between it and the signal generator 200.
  • the distance is adjusted to ensure that each driver 100 at different distances can receive the complete image differential signal without generating a large amount of electromagnetic radiation.
  • the distance parameter may include the ordinal number of the pixel columns currently required to be driven. Since the positions of the target driver 100, the signal generator 200, and the pixel columns on the display device are fixed, the target driver 100 can be determined according to the ordinal number of pixel columns currently required to be driven. The ordinal number is used as a distance parameter that characterizes the distance between the target driver 100 and the signal generator 200, and step S211 may include: determining the amplitude of the image differential signal according to the ordinal number of the pixel column currently required to be driven.
  • the ordinal numbers of different pixel columns can correspond to different amplitudes of the image differential signals. Taking the ordinal number of the pixel column corresponding to the driver 100 closest to the signal generator 200 as the reference ordinal number, the amplitude of the image differential signal corresponding to the driver 100 is the smallest. The smaller the difference between the number of pixel columns to be driven and the reference number is, the closer the distance between the target driver 100 and the signal generator 200 is, and the smaller the amplitude of the corresponding image differential signal is; the pixels to be driven currently The greater the difference between the column number and the reference number, the greater the distance between the target driver 100 and the signal generator 200, and the greater the amplitude of the corresponding image differential signal.
  • the driver 100 and the amplitude of the image differential signal it receives can be matched based on the ordinal number of the pixel column, so that each driver 100 at different distances can receive the complete image differential signal without generating a large amount of electromagnetic radiation.
  • the step of determining the amplitude of the image differential signal according to the ordinal number of the pixel column to be driven currently includes:
  • Step S211 Determine the numerical interval where the ordinal number of the pixel column is located
  • One driver 100 can drive pixel units 01 in a plurality of pixel columns. Therefore, the sequence number of the pixel column where the pixel unit 01 connected to the same driver 100 is located can be formed into a preset value interval.
  • the multiple drivers 100 are correspondingly formed with multiple preset value intervals. Among the multiple preset value intervals, the value interval where the ordinal number of the pixel row to be driven currently is determined is determined.
  • Step S212 Determine a preset amplitude corresponding to the numerical interval as the amplitude of the image differential signal.
  • Different numerical intervals can correspond to different preset amplitude values of the image differential signal.
  • the numerical interval corresponding to the driver 100 closest to the signal generator 200 is used as a reference interval, and the amplitude of the image differential signal corresponding to the reference interval is the minimum amplitude. If the difference between the ordinal numbers in the numerical interval and the reference interval is smaller, the preset amplitude of the image differential signal corresponding to the numerical interval is smaller; the greater the difference between the ordinal numbers in the numerical interval and the reference interval, the numerical interval The larger the preset amplitude of the corresponding image differential signal.
  • each driver 100 corresponds to driving a plurality of pixel columns
  • the sequence number of the pixel column is divided into different numerical intervals, and the numerical intervals can accurately characterize the corresponding driver 100 and signal
  • the distance between the generators 200, each numerical interval corresponds to an amplitude of the image differential signal, to ensure the accuracy of the determined amplitude of the image differential signal, so that the quality of the image differential signal received by the target driver 100 and the generated electromagnetic
  • the optimal coordination effect is achieved between radiations.
  • the method further includes:
  • Step S001 dividing at least two numerical intervals according to the ordinal number of the pixel column driven by each of the drivers;
  • the set of ordinal numbers of all pixel columns driven by each driver is formed into a numerical interval, so at least two numerical intervals can be obtained.
  • Step S002 Obtain the distance between each driver and the signal generator
  • the distance between each driver and the signal generator can be obtained by acquiring the parameters input by the debugger, or by direct measurement and other methods.
  • Step S003 Determine a preset amplitude corresponding to each of the numerical intervals according to each distance; the preset amplitude increases as the distance between the driver and the signal generator increases.
  • the amplitude of the corresponding image differential signal can be determined as the preset amplitude corresponding to the numerical interval according to the distance of the corresponding driver. The larger the distance, the larger the corresponding preset amplitude.
  • step S003 and before step S10 at least two divided numerical intervals and corresponding preset amplitude values of the image differential signal may be obtained to generate an amplitude lookup table.
  • the step of determining the preset amplitude corresponding to the numerical interval as the amplitude of the image differential signal includes: querying the amplitude lookup table according to the numerical interval, and presetting the preset corresponding to the numerical interval The amplitude is determined as the amplitude of the image differential signal.
  • the preset ordinal and amplitude correspondence table can be queried according to the determined numerical interval, and the preset amplitude obtained from the lookup table is used as the image corresponding to the numerical interval The amplitude of the differential signal.
  • each driver can adapt to its different distance from the signal generator and adopt different amplitudes of the image differential signal.
  • the line length of the differential signal line between each driver and the signal generator can be obtained; the distance between each driver and the signal generator is correspondingly determined according to each line length.
  • the line length can be obtained by obtaining the manufacturing index of the display device and the data of the BOM table. Use the obtained line length as the distance between the driver and the signal generator. Because the image differential signal between the driver and the signal generator is transmitted based on the differential signal line, the distance between the driver and the signal generator is determined by the line length of the differential signal line, which is beneficial to the determined preset amplitude accurate.
  • the methods in the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware, but in many cases the former is better Implementation.
  • the technical solution of the present application can be embodied in the form of a software product in essence or part that contributes to the existing technology, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above , Disk, CD), including several instructions to make a terminal device (which can be a mobile phone, computer, server, air conditioner, or network equipment, etc.) to perform the method described in each embodiment of the present application.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un procédé de commande de dispositif d'affichage, un appareil de commande de dispositif d'affichage et un dispositif d'affichage. Le procédé de commande de dispositif d'affichage consiste : à obtenir un paramètre de distance entre un pilote et un générateur de signaux (S10) ; à déterminer l'amplitude d'un signal différentiel d'image en fonction du paramètre de distance (S20) ; à commander le générateur de signaux que celui-ci émette le signal différentiel d'image en fonction de l'amplitude (S30).
PCT/CN2019/124863 2018-12-26 2019-12-12 Dispositif d'affichage, procédé et appareil de commande associés WO2020135072A1 (fr)

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CN109509421A (zh) * 2018-12-26 2019-03-22 惠科股份有限公司 显示设备及其控制方法、装置

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US5212700A (en) * 1991-07-24 1993-05-18 Sumitomo Electric Industries, Ltd. Modulation circuit for a light emission device
CN1489125A (zh) * 2002-08-27 2004-04-14 精工爱普生株式会社 显示驱动电路及显示装置
CN105448270A (zh) * 2016-01-19 2016-03-30 京东方科技集团股份有限公司 一种显示驱动系统和显示装置
CN106023931A (zh) * 2016-07-21 2016-10-12 青岛海信电器股份有限公司 液晶屏及其节能控制方法
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