WO2017201831A1 - 显示装置及其控制方法 - Google Patents

显示装置及其控制方法 Download PDF

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Publication number
WO2017201831A1
WO2017201831A1 PCT/CN2016/089790 CN2016089790W WO2017201831A1 WO 2017201831 A1 WO2017201831 A1 WO 2017201831A1 CN 2016089790 W CN2016089790 W CN 2016089790W WO 2017201831 A1 WO2017201831 A1 WO 2017201831A1
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WIPO (PCT)
Prior art keywords
signal
clock signals
voltage
display device
pixel signal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/089790
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English (en)
French (fr)
Inventor
曾德康
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US15/301,056 priority Critical patent/US10276114B2/en
Publication of WO2017201831A1 publication Critical patent/WO2017201831A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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    • 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
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    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • 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
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • G09G5/008—Clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/08—Details of image data interface between the display device controller and the data line driver circuit

Definitions

  • the present invention relates to a display device and a control method thereof, and more particularly to a display device including a source module and an array module, and a control method thereof.
  • a source module is used to convert a digital value into an analog operating voltage value, and the analog voltage value passes through a data line on an array module to display a pixel signal.
  • FIG. 1 shows a block diagram of a display device 100 in accordance with the prior art.
  • the display device 100 can include a source module 101 and an array module 109.
  • the source module 101 may include a receiving unit 102, a shift register 103, a line memory 104, a level boosting unit 105, a digital-to-analog converting unit 106, and an amplifying circuit 107.
  • Differential signals eg, low voltage differential signaling (LVDS) or mini-LVDS
  • the receiving unit 102 is configured to convert the received differential signal into a digital signal.
  • the shift register 103 is for converting a serially transmitted digital signal into a parallel transmitted digital signal.
  • the line memory 104 is for orderly storing the digital signals in accordance with the display position in the display device 100.
  • the level boosting unit 105 boosts the voltage value of the digital signal stored in the line memory 104 to the analog operating voltage value.
  • the digital to analog conversion unit 106 converts the analog operating voltage value into a grayscale voltage value.
  • the amplifying circuit 107 further amplifies the gray scale voltage value to enhance the driving ability of the display device 100.
  • the source module 101 typically includes 960 channels, and each channel requires an amplifying circuit.
  • each channel requires an amplifying circuit.
  • the current of the amplifying circuit is large, so that the temperature of the source module is high.
  • the temperature of the source module may exceed the junction temperature, making the source module inoperable.
  • One or more exemplary embodiments overcome the above disadvantages and other disadvantages not described above. Further, the exemplary embodiments are not required to overcome the disadvantages described above, and the exemplary embodiments may not overcome any of the problems described above.
  • a display device including a source module and an array module.
  • the source module includes: a receiving unit that receives an image signal and extracts a control signal and a pixel signal from the image signal; and a clock signal generating unit that generates a plurality of clock signals, wherein each of the plurality of clock signals The periods are the same and the high-level period of each clock signal does not overlap each other; the level boosting unit boosts the extracted control signal and the voltage of the pixel signal to the analog operating voltage; the digital-to-analog conversion unit will rise The voltage of the pressed pixel signal is converted to a gray scale voltage.
  • the array module includes a shift register that outputs a pixel signal having a gray scale voltage based on the boosted control signal and the generated plurality of clock signals.
  • the array module may further include an amplifying circuit that amplifies a voltage of the pixel signal having the gray scale voltage output by the shift register to display an image.
  • the number of the plurality of clock signals may be greater than or equal to three.
  • the control signal can be obtained based on a line start signal in the image signal.
  • the shift register may sequentially output corresponding pixels during a high level of each of the plurality of clock signals signal.
  • the level boosting unit and the digital to analog conversion unit can use two channels, positive and negative, respectively.
  • a method of controlling a display device includes a source module and an array module.
  • the method includes: a source module receiving an image signal and extracting a control signal and a pixel signal from the image signal; the source module generating a plurality of clock signals, wherein each of the plurality of clock signals has a same period And the high-level time period of each clock signal does not overlap each other; the source module boosts the extracted control signal and the voltage of the pixel signal to an analog working voltage; and the voltage of the boosted pixel signal by the source module Converted to gray scale voltage; the array module is based on the boosted control signal and the generated multiple clock signal outputs have gray The pixel signal of the step voltage.
  • the number of the plurality of clock signals may be greater than or equal to three.
  • the array module can amplify the voltage of the output pixel signal having the gray scale voltage to display an image.
  • the source module can obtain the control signal based on the row start signal in the image signal.
  • the step of the array module outputting the pixel signal having the gray scale voltage may include: when the control signal and the first one of the plurality of clock signals transition to a high level, the array module is each of the plurality of clock signals The corresponding pixel signals are sequentially output during the high level period of the clock signals.
  • FIG. 1 is a block diagram showing a display device according to the related art
  • FIG. 2 is a block diagram showing a display device according to an exemplary embodiment of the present invention.
  • FIG. 3 is a diagram showing a circuit of a shift register according to an exemplary embodiment of the present invention.
  • FIG. 4 is a timing diagram showing an output of a shift register according to an exemplary embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a method of controlling a display device, according to an exemplary embodiment of the present invention.
  • unit and “module” as used herein mean a unit for processing at least one function or operation, wherein the unit may be implemented by hardware, software, or a combination of hardware and software.
  • FIG. 2 is a block diagram showing a display device 200 according to an exemplary embodiment of the present invention.
  • a display device 200 may include a source module 201 and an array module 207.
  • the source module 201 may include a receiving unit 202, a clock signal generating unit 203, a level boosting unit 204, and a digital to analog converting unit 205.
  • the array module 209 can include a shift register 206 and an amplification circuit 207.
  • the display device 200 may be various types of devices having a display function such as a smart phone, a digital television, a tablet personal computer (PC), a portable multimedia player (PMP), an individual.
  • Digital assistants (PDAs) navigation devices, digital cameras, monitors, laptop computers, and the like.
  • the display device 200 according to an exemplary embodiment of the present invention may be implemented using any one of the following: an organic light emitting diode (OLED), a liquid crystal display (LCD) And an active matrix organic light emitting diode (AMOLED).
  • OLED organic light emitting diode
  • LCD liquid crystal display
  • AMOLED active matrix organic light emitting diode
  • the receiving unit 202 can receive the image signal and extract the control signal and the pixel signal from the image signal.
  • image data can be transmitted by using a differential signal such as a low voltage differential signal (LVDS) or a mini-LVDS.
  • LVDS low voltage differential signal
  • mini-LVDS mini-LVDS
  • the receiving unit 202 may extract a line start signal of an image signal as a control signal (STH).
  • the receiving unit 202 can also extract a pixel signal extracted from the image signal.
  • the clock signal generating unit 203 can generate a plurality of clock signals CLK1-CLKn and supply the plurality of clock signals CLK1-CLKn to the shift register 206.
  • periods of each of the plurality of clock signals may be the same and a high level period of each of the clock signals may not overlap each other.
  • the period of the clock signal may be the sum of the high level periods of each of the plurality of clock signals.
  • the period of the clock signal may be the sum of the first high period of time of CLK1, CLK2, and CLK3.
  • the number of the plurality of clock signals may be greater than or equal to three.
  • the level boosting unit 204 boosts the extracted control signal and pixel signal. Specifically, the level boosting unit 204 boosts the voltages of the extracted control signals and pixel signals to an analog operating voltage (VAA), and supplies a control signal having an analog operating voltage to the shift register 206.
  • VAA analog operating voltage
  • the digital-to-analog conversion unit 205 can convert the voltage of the boosted pixel signal into a grayscale voltage, and supply the pixel signal having the grayscale voltage to the shift register 206.
  • the shift register 206 may output a pixel signal having a gray scale voltage based on the boosted control signal and the generated plurality of clock signals. Specifically, when the first clock signal of the control signal and the plurality of clock signals transitions to a high level, the shift register 206 sequentially outputs corresponding values during a high level period of each of the plurality of clock signals Pixel signal.
  • the line memory can be omitted in the source modules, thereby saving the manufacturing cost of the source modules.
  • the level boosting unit 204 and the digital-to-analog conversion unit 205 only need to The two channels are positive and negative, respectively, and each of the channels (for example, 960 channels) in the display device 100 shown in FIG. 1 requires a respective level boosting unit and a digital-to-analog conversion unit. Therefore, the manufacturing cost of the source module can be saved.
  • the process of outputting the pixel signal by the shift register 206 will be described in detail with reference to FIGS. 3 and 4.
  • the amplifying circuit 207 may amplify a voltage of a pixel signal having a gray scale voltage output by the shift register to display an image.
  • the amplifying circuit 207 can be implemented by a step-amplifying operational amplifier (for example, an accidental operational amplifying circuit).
  • a step-amplifying operational amplifier for example, an accidental operational amplifying circuit.
  • FIG. 3 is a diagram showing a circuit of a shift register 206 according to an exemplary embodiment of the present invention.
  • FIG. 4 is a timing diagram showing an output of the shift register 206, according to an exemplary embodiment of the present invention.
  • the circuit configuration and output timing chart of the shift register 206 will be described using a case where three clock signals are used as a preferred embodiment.
  • the shift register 206 according to an exemplary embodiment of the present invention is not limited thereto.
  • Q may represent a transistor
  • C may represent a capacitor
  • INPUT may represent an input
  • OUT 1 to OUT 5 may represent a first output to a fifth output, respectively.
  • STH control signal
  • CLK1 level of the first clock
  • Voltage value ie, a pixel signal with a grayscale voltage
  • CLK1 charges C1 to its high potential.
  • the second clock (CLK2) is high
  • Q4 is turned on
  • the high level of C1 turns on Q6.
  • the second output terminal (OUT 2) can output the input terminal ( INPUT) The value of the voltage received.
  • CLK2 charges C2 to bring its potential high.
  • Q1, Q2, and Q3 are turned off, and the first output maintains the original level.
  • the third clock (CLK3) When the third clock (CLK3) is at a high level, Q5 is turned on, the potential of C1 is discharged to 0V, and Q7 is turned on. At this time, the high level of C2 causes Q9 to be turned on, and therefore, as shown in FIG. 4, the third output terminal (OUT 3) can output the voltage value received at the input terminal (INPUT). At the same time, CLK3 charges C4 to its high level, and CLK2 is low, Q4 and Q6 are off, so that the second output The end remains at the original level.
  • a pixel signal of one line can be output through the first output terminal (OUT 1) to the nth output terminal (OUT n).
  • the voltage value received by the input terminal is sequentially outputted from the first output terminal (OUT 1) until the image signal is obtained with the corresponding voltage.
  • the first output (OUT 1) to the nth output (OUT n) of the shift register can be respectively connected to respective ones of the amplification lines.
  • FIG. 5 is a flowchart illustrating a method of controlling the display device 200, according to an exemplary embodiment of the present invention.
  • the source module may receive an image signal and extract a control signal and a pixel signal from the image signal in operation S501.
  • the source module may generate a plurality of clock signals in operation S503, wherein a period of each of the plurality of clock signals is the same and a high level period of each of the clock signals does not overlap each other.
  • the source module may boost the voltages of the extracted control signal and the pixel signal to an analog operating voltage.
  • the source module may convert the voltage of the boosted pixel signal into a gray scale voltage.
  • the array module may output a pixel signal having a grayscale voltage based on the boosted control signal and the generated plurality of clock signals.
  • the number of the plurality of clock signals may be greater than or equal to three.
  • the array module can amplify the voltage of the output pixel signal having the gray scale voltage to display an image.
  • the source module obtains a control signal based on a row start signal in the image signal.
  • the array module sequentially outputs corresponding ones during a high level of each of the plurality of clock signals Pixel signal.
  • exemplary embodiments can also be implemented by computer readable code/instructions in/on a medium (eg, computer readable medium) to control at least one processing element to implement any of the above-described exemplary embodiments.
  • the medium can correspond to any medium that allows for storage and/or transmission of computer readable code.
  • a medium including a recording medium such as a magnetic storage medium (for example, a ROM, a floppy disk, a hard disk, or the like) and an optical recording medium (for example, a CD-ROM or DVD) and a transmission medium such as an Internet transmission medium
  • the computer may
  • the read code can be recorded/transmitted on the medium in a variety of ways.
  • a medium may be such a defined and measurable structure that includes or carries signals or information, such as a device that carries a bitstream, in accordance with one or more exemplary embodiments.
  • the medium can also be a distributed network such that the computer readable code is stored/transmitted and executed in a distributed fashion.
  • processing elements can include processors or computer processors, which can be distributed and/or included in a single device.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

提供了一种显示装置及其控制方法。所述显示装置包括源极模块和阵列模块。源极模块包括：接收单元，接收图像信号并从图像信号中提取出控制信号和像素信号；时钟信号产生单元，产生多个时钟信号，其中，所述多个时钟信号中的每个时钟信号的周期相同并且所述每个时钟信号的高电平时间段彼此不重叠；电平升压单元，将提取出的控制信号和像素信号的电压升压至模拟工作电压；数模转换单元，将升压后的像素信号的电压转换为灰阶电压。阵列模块包括：移位寄存器，基于升压后的控制信号和产生的多个时钟信号输出具有灰阶电压的像素信号。

Description

显示装置及其控制方法 技术领域
本发明涉及一种显示装置及其控制方法，更具体地讲，涉及一种包括源极模块和阵列模块的显示装置及其控制方法。
背景技术
在显示装置中，使用源极(source)模块来将数位值转换成模拟工作电压值，模拟电压值经过阵列(array)模块上的数据线路，从而显示像素信号。
图1示出根据现有技术的显示装置100的框图。
显示装置100可包括源极模块101和阵列模块109。源极模块101可包括：接收单元102、移位寄存器103、行存储器104、电平升压单元105、数模转换单元106和放大电路107。通常使用差分信号(例如，低电压差分信号(LVDS)或mini-LVDS)来传输图像数据。接收单元102用于将接收到的差分信号转换为数位信号。移位寄存器103用于将串行传输的数位信号转换为并行传输的数位信号。行存储器104用于按照显示装置100中的显示位置对数位信号进行有序存储。电平升压单元105将行存储器104存储的数位信号的电压值升压至模拟工作电压值。数模转换单元106将模拟工作电压值转换为灰阶电压值。放大电路107进一步放大灰阶电压值，以提升显示装置100的驱动能力。
然而，源极模块101中通常包括960个通道，并且每一个通道都需要一个放大电路。当显示装置的负载长时间很大时，放大电路的电流就会很大，从而使得源极模块的温度很高。在某些情况下，源极模块的温度可能会超过节点温度，从而使得源极模块无法正常工作。
发明内容
一个或更多个示例性实施例克服了上述缺点以及以上没有描述的其它缺点。此外，示例性实施例不需要克服以上描述的缺点，并且示例性实施例可以不克服以上描述的任何问题。
根据本发明的示例性实施例的一方面，提供了一种显示装置，其中，所述显示装置包括源极模块和阵列模块。源极模块包括：接收单元，接收图像信号并从图像信号中提取出控制信号和像素信号；时钟信号产生单元，产生多个时钟信号，其中，所述多个时钟信号中的每个时钟信号的周期相同并且所述每个时钟信号的高电平时间段彼此不重叠；电平升压单元，将提取出的控制信号和像素信号的电压升压至模拟工作电压；数模转换单元，将升压后的像素信号的电压转换为灰阶电压。阵列模块包括：移位寄存器，基于升压后的控制信号和产生的多个时钟信号输出具有灰阶电压的像素信号。
阵列模块还可包括：放大电路，对由移位寄存器输出的具有灰阶电压的像素信号的电压进行放大以显示图像。
所述多个时钟信号的数量可大于或等于3。
控制信号可基于图像信号中的行起始信号来获得。
当控制信号和所述多个时钟信号中的第一个时钟信号转变为高电平时，移位寄存器可在所述多个时钟信号中的每个时钟信号的高电平期间依次输出相应的像素信号。
电平升压单元和数模转换单元可使用分别为正和负的两个通道。
根据本发明的示例性实施例的另一方面，提供了一种控制显示装置的方法，其中，所述显示装置包括源极模块和阵列模块。所述方法包括：源极模块接收图像信号并从图像信号中提取出控制信号和像素信号；源极模块产生多个时钟信号，其中，所述多个时钟信号中的每个时钟信号的周期相同并且所述每个时钟信号的高电平时间段彼此不重叠；源极模块将提取出的控制信号和像素信号的电压升压至模拟工作电压；源极模块将升压后的像素信号的电压转换为灰阶电压；阵列模块基于升压后的控制信号和产生的多个时钟信号输出具有灰 阶电压的像素信号。
所述多个时钟信号的数量可大于或等于3。
阵列模块可对输出的具有灰阶电压的像素信号的电压进行放大以显示图像。
源极模块可基于图像信号中的行起始信号来获得控制信号。阵列模块输出具有灰阶电压的像素信号的步骤可包括：当控制信号和所述多个时钟信号中的第一个时钟信号转变为高电平时，阵列模块在所述多个时钟信号中的每个时钟信号的高电平期间依次输出相应的像素信号。
通过使用根据本发明的示例性实施例的方法和设备，能够提高阵列模块的制程的利用率并降低源极模块的成本的同时改善源极模块温度过高的问题。
将在接下来的描述中部分阐述本发明总体构思另外的方面和/或优点，还有一部分通过描述将是清楚的，或者可以经过本发明总体构思的实施而得知。
附图说明
通过下面结合示例性地示出一例的附图进行的描述，本发明的上述和其他目的和特点将会变得更加清楚，其中：
图1是示出根据现有技术的显示装置的框图；
图2是示出根据本发明的示例性实施例的显示装置的框图；
图3是示出根据本发明的示例性实施例的移位寄存器的电路的示图；
图4是示出根据本发明的示例性实施例的移位寄存器的输出的时序图；
图5是示出根据本发明的示例性实施例的控制显示装置的方法的流程图。
具体实施方式
现在将具体参照在附图中示出其示例的示例性实施例，在附图中，相同的标号始终指示相似的元件。在这方面，本示例性实施例可具有不同形式，不应被解释为限于在此阐述的描述。相应地，仅在下面通过参照附图来描述示例性实施例以解释本说明书的各方面。
关于在此使用的术语，在考虑示例性实施例中的功能的情况下尽可能地选择最广泛使用的术语；然而，这些术语可根据本领域技术人员的意图、判例或新技术的出现而改变。在此使用的一些术语可由申请人任意选择。在这种情况下，这些术语将在下面被具体定义。相应地，应基于其独特含义和本构思的整体语境来理解在此使用的特定术语。
还将理解的是，当在此使用术语“包括”、“包含”和“具有”时，除非另有定义，否则所述术语说明所列举的元素的存在，但不排除其他元素的存在或添加。此外，在此使用的术语“单元”和“模块”表示用于处理至少一种功能或操作的单元，其中，所述单元可由硬件、软件或者硬件和软件的组合实现。
下面将参照附图来具体描述示例性实施例，使得本领域普通技术人员可容易地实现本发明构思。然而，本发明构思可以以许多不同方式实现，并不应被视为限于在此阐述的示例性实施例。此外，将在附图中省略与示例性实施例的描述无关的部分以清楚地描述示例性实施例，在整个说明书中相似的标号将表示相似的元件。
图2是示出根据本发明的示例性实施例的显示装置200的框图。
参照图2，根据本发明的示例性实施例的显示装置200可包括源极(source)模块201和阵列(array)模块207。源极模块201可包括接收单元202、时钟信号产生单元203、电平升压单元204和数模转换单元205。阵列模块209可包括移位寄存器206和放大电路207。
这里，根据本发明的示例性实施例的显示装置200可以是具有显示功能的各种类型的设备，诸如智能电话、数字电视机、平板个人计算机(PC)、便携式多媒体播放器(PMP)、个人数字助理(PDA)、导航装置、数字相机、监视器、膝上型计算机等。此外，可使用以下项中的任何一项来实现根据本发明的示例性实施例的显示装置200：有机发光二极管(OLED)、液晶显示器(LCD) 和有源矩阵有机发光二极管(AMOLED)。以下，将使用TFT-LCD来实现的显示装置作为示例进行描述。然而，对于本领域技术人员而言显然的是根据本发明的示例性实施例的显示装置200不限于此。
接收单元202可接收图像信号并从图像信号中提取出控制信号和像素信号。这里，可通过使用差分信号(例如，低电压差分信号(LVDS)或mini-LVDS)来传输图像数据。以下，将以mini-LVDS作为示例对根据本发明的示例性实施例进行描述。当使用mini-LVDS来传输图像数据时，能够有效降低传输工号并减少传输过程中的干扰。
根据本发明的示例性实施例，接收单元202可将图像信号的行起始信号提取为控制信号(STH)。接收单元202还可提取从图像信号提取出像素信号。时钟信号产生单元203可产生多个时钟信号CLK1-CLKn，并将多个时钟信号CLK1-CLKn提供给移位寄存器206。根据本公开的示例性实施例，多个时钟信号中的每个时钟信号的周期可相同并且所述每个时钟信号的高电平时间段可彼此不重叠。例如，时钟信号的周期可以是多个时钟信号中的每个时钟信号的高电平时间段之和。参照图4，时钟信号的周期可以是CLK1、CLK2和CLK3的第一个高电平时间段之和。根据本发明的示例性实施例，多个时钟信号的数量可大于或等于3。
电平升压单元204对提取出的控制信号和像素信号进行升压。具体来说，电平升压单元204将提取出的控制信号和像素信号的电压升压至模拟工作电压(VAA)，并将具有模拟工作电压的控制信号提供给移位寄存器206。数模转换单元205可将升压后的像素信号的电压转换为灰阶电压，并将具有灰阶电压的像素信号提供给移位寄存器206。
根据本发明的示例性实施例，移位寄存器206可基于升压后的控制信号和产生的多个时钟信号输出具有灰阶电压的像素信号。具体来说，当控制信号和多个时钟信号中的第一个时钟信号转变为高电平时，移位寄存器206在所述多个时钟信号中的每个时钟信号的高电平期间依次输出相应的像素信号。
通过基于提取出的控制信号和产生的多个时钟信号有序地输出具有灰阶电压的像素信号，能够在源极模块中省略行存储器，从而能够节省源极模块的制作成本。此外，在这种情况下，电平升压单元204和数模转换单元205仅需 要分别为正和负的两个通道，而在如图1所示的显示装置100中每个通道(例如，960个通道)中分别需要各自的电平升压单元和数模转换单元。因此，能够节省源极模块的制作成本。以下，将参照图3和图4详细描述移位寄存器206输出像素信号的处理。
根据本发明的示例性实施例，放大电路207可对由移位寄存器输出的具有灰阶电压的像素信号的电压进行放大以显示图像。可通过逐级放大的运算放大器(例如，偶然级运算放大电路)来实现放大电路207。根据本发明的示例性实施例，通过将移位寄存器206和放大电路207整合到阵列模块209中，能够有效提供阵列模块制程的有效利用率，并改善源极模块温度过高的问题。
图3是示出根据本发明的示例性实施例的移位寄存器206的电路的示图。图4是示出根据本发明的示例性实施例的移位寄存器206的输出的时序图。
如图3和图4所示，将使用3个时钟信号的情况作为优选的实施例对移位寄存器206的电路结构和输出时序图进行了描述。然而，对于本领域技术人员而言显然的是，根据本发明的示例性实施例的移位寄存器206不限于此。
在图3中，Q可表示晶体管，C可表示电容器，INPUT可表示输入端，OUT 1至OUT 5可分别表示第一输出端至第五输出端。如图4所示，当控制信号(STH)的电平和第一时钟(CLK1)的电平都为高电平时，可通过第一输出端(OUT 1)来输出输入端(INPUT)接收到的电压值(即，具有灰阶电压的像素信号)。同时，CLK1可对C1充电使其电位为高电平。
随后，当第二时钟(CLK2)为高电平时，Q4导通，C1的高电平使Q6导通，此时，如图4所示，第二输出端(OUT 2)可输出输入端(INPUT)接收到的电压值。同时，CLK2给C2充电使其电位为高电平。另外，由于控制信号和第一时钟都为低电平，因此Q1、Q2和Q3截止，第一输出端保持原始电平。
当第三时钟(CLK3)为高电平时，Q5导通，C1的电位放电至0V，并且，Q7导通。此时，C2的高电平使得Q9导通，因此，如图4所示，第三输出端(OUT 3)可输出输入端(INPUT)接收到的电压值。同时，CLK3给C4充电而使其电位为高电平，并且CLK2为低电平，Q4和Q6截止，这样，第二输出 端保持原始电平。
当第一时钟信号(CLK1)再次变为高电平时，Q8导通并将C2电位放电至0V。此时，STH的电位为低电平，因此第一输出端(OUT 1)无法与输入端(INPUT)导通。另外，Q17导通，C4的高电位使得Q18也导通，从而如图4所示，第四输出端(OUT 4)可输出输入端接收到的电压值。同时，CLK1给C5充电使其电位为高电平。
这样，通过CLK1\CLK2\CLK3的不断循环，可通过第一输出端(OUT 1)至第n输出端(OUT n)来输出一行的像素信号。当接收到下一个行起始信号STH时，从第一输出端(OUT 1)开始依次输出输入端接收到的电压值，直到图像信号均得到相应的电压为止。
移位寄存器的第一输出端(OUT 1)至第n输出端(OUT n)可分别与放大线路中的相应的输入端连接。
图5是示出根据本发明的示例性实施例的控制显示装置200的方法的流程图。
参照图5，在操作S501，源极模块可接收图像信号并从图像信号中提取出控制信号和像素信号。
在操作S503，源极模块可产生多个时钟信号，其中，所述多个时钟信号中的每个时钟信号的周期相同并且所述每个时钟信号的高电平时间段彼此不重叠。
在操作S505，源极模块可将提取出的控制信号和像素信号的电压升压至模拟工作电压。
在操作S507，源极模块可将升压后的像素信号的电压转换为灰阶电压。
在操作S509，阵列模块可基于升压后的控制信号和产生的多个时钟信号输出具有灰阶电压的像素信号。
根据本发明的示例性实施例，所述多个时钟信号的数量可大于或等于3。阵列模块可对输出的具有灰阶电压的像素信号的电压进行放大以显示图像。
根据本发明的另一示例性实施例，源极模块基于图像信号中的行起始信号来获得控制信号。
作为另一示例，当控制信号和多个时钟信号中的第一个时钟信号转变为高电平时，阵列模块在所述多个时钟信号中的每个时钟信号的高电平期间依次输出相应的像素信号。
如上所述，根据以上示例性实施例中的一个或更多个，能够提高阵列模块的制程的利用率并降低源极模块的成本的同时改善源极模块温度过高的问题。
此外，其他示例性实施例也可通过介质(例如，计算机可读介质)中/上的计算机可读代码/指令来实现，以控制至少一个处理元件实现任何上述示例性实施例。介质可与允许计算机可读代码的存储和/或传输的任何介质相应。利用包括记录介质(诸如，磁存储介质(例如，ROM、软盘、硬盘等)和光记录介质(例如，CD-ROM或DVD))和传输介质(诸如，互联网传输介质)的介质的示例，计算机可读代码可以以各种方式在介质上被记录/传输。因此，介质可以是根据一个或更多个示例性实施例的包括或携带信号或信息的这样定义和可测量的结构，诸如，携带比特流的装置。介质还可以是分布式网络，使得计算机可读代码以分布式方式被存储/传输和执行。此外，处理元件可包括处理器或计算机处理器，处理元件可分布和/或包括在单个装置中。
应理解的是，在此描述的示例性实施例应仅以描述性含义被考虑，而不是为了限制的目的。对于每个示例性实施例中的特征和方面的描述通常应被考虑为可用于其他示例性实施例中的其他类似特征或方面。虽然已参照附图描述了一个或更多个示例性实施例，但本领域普通技术人员将理解的是，在不脱离由权利要求限定的精神和范围的情况下，可做出形式和细节上的各种改变。

Claims (10)

  1. 一种显示装置，其中，所述显示装置包括源极模块和阵列模块，其中，源极模块包括：
    接收单元，接收图像信号并从图像信号中提取出控制信号和像素信号；
    时钟信号产生单元，产生多个时钟信号，其中，所述多个时钟信号中的每个时钟信号的周期相同并且所述每个时钟信号的高电平时间段彼此不重叠；
    电平升压单元，将提取出的控制信号和像素信号的电压升压至模拟工作电压；
    数模转换单元，将升压后的像素信号的电压转换为灰阶电压，
    阵列模块包括：
    移位寄存器，基于升压后的控制信号和产生的多个时钟信号输出具有灰阶电压的像素信号。
  2. 如权利要求1所述的显示装置，其中，阵列模块还包括：放大电路，对由移位寄存器输出的具有灰阶电压的像素信号的电压进行放大以显示图像。
  3. 如权利要求1所述的显示装置，其中，所述多个时钟信号的数量大于或等于3。
  4. 如权利要求1所述的显示装置，其中，控制信号是基于图像信号中的行起始信号来获得的。
  5. 如权利要求1所述的显示装置，其中，当控制信号和所述多个时钟信号中的第一个时钟信号转变为高电平时，移位寄存器在所述多个时钟信号中的每个时钟信号的高电平期间依次输出相应的像素信号。
  6. 如权利要求1所述的显示装置，其中，电平升压单元和数模转换单元使用分别为正和负的两个通道。
  7. 一种控制显示装置的方法，其中，所述显示装置包括源极模块和阵列模块，所述方法包括：
    源极模块接收图像信号并从图像信号中提取出控制信号和像素信号；
    源极模块产生多个时钟信号，其中，所述多个时钟信号中的每个时钟信号的周期相同并且所述每个时钟信号的高电平时间段彼此不重叠；
    源极模块将提取出的控制信号和像素信号的电压升压至模拟工作电压；
    源极模块将升压后的像素信号的电压转换为灰阶电压；
    阵列模块基于升压后的控制信号和产生的多个时钟信号输出具有灰阶电压的像素信号。
  8. 如权利要求7所述的方法，其中，所述多个时钟信号的数量大于或等于3。
  9. 如权利要求7所述的方法，其中，阵列模块对输出的具有灰阶电压的像素信号的电压进行放大以显示图像。
  10. 如权利要求7所述的方法，其中，源极模块基于图像信号中的行起始信号来获得控制信号，
    其中，阵列模块输出具有灰阶电压的像素信号的步骤包括：当控制信号和所述多个时钟信号中的第一个时钟信号转变为高电平时，阵列模块在所述多个时钟信号中的每个时钟信号的高电平期间依次输出相应的像素信号。
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