WO2018192510A1 - 电致发光显示面板、其驱动方法、驱动装置以及显示装置 - Google Patents

电致发光显示面板、其驱动方法、驱动装置以及显示装置 Download PDF

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Publication number
WO2018192510A1
WO2018192510A1 PCT/CN2018/083470 CN2018083470W WO2018192510A1 WO 2018192510 A1 WO2018192510 A1 WO 2018192510A1 CN 2018083470 W CN2018083470 W CN 2018083470W WO 2018192510 A1 WO2018192510 A1 WO 2018192510A1
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Prior art keywords
temperature
display panel
electroluminescent display
driving voltage
standard
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PCT/CN2018/083470
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English (en)
French (fr)
Inventor
赵利军
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京东方科技集团股份有限公司
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Priority to US16/301,832 priority Critical patent/US10930206B2/en
Publication of WO2018192510A1 publication Critical patent/WO2018192510A1/zh

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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
    • G09G3/22—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]
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/027—Arrangements or methods related to powering off a display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection

Definitions

  • the present disclosure relates to an electroluminescence display panel, a driving method thereof, a driving device, and a display device.
  • OLED Organic Light Emitting Diode
  • An embodiment of the present disclosure provides a driving method of an electroluminescent display panel, including:
  • a driving voltage of the electroluminescent display panel Responsively adjusting a driving voltage of the electroluminescent display panel to a second driving voltage higher than a standard driving voltage in response to the detected temperature of the electroluminescent display panel being within an operating temperature range and being less than a second standard temperature;
  • the first standard temperature is greater than or equal to the second standard temperature.
  • the driving voltage of the electroluminescent display panel is adjusted to a first driving voltage lower than a standard driving voltage, and the driving voltage of the electroluminescent display panel is adjusted to be higher than
  • the second drive voltage of the standard drive voltage includes:
  • the driving voltage of the electroluminescence display panel is adjusted to a driving voltage corresponding to the detected temperature interval to which the temperature of the electroluminescent display panel belongs, in accordance with the correspondence relationship between the temperature interval and the driving voltage.
  • the driving method provided by the embodiment of the present disclosure further includes: responsive to the detected temperature of the electroluminescent display panel being between the first standard temperature and the second standard temperature, The driving voltage of the electroluminescent display panel is set to a standard driving voltage.
  • the driving method provided by the embodiment of the present disclosure further includes: cutting off the power of the electroluminescent display panel in response to the detected temperature of the electroluminescent display panel not belonging to an operating temperature range.
  • detecting the temperature of the electroluminescent display panel comprises detecting a temperature of the electroluminescent display panel at selected time intervals.
  • An embodiment of the present disclosure further provides a driving device for an electroluminescent display panel, comprising: a temperature sensor, a temperature detecting circuit, a controller, and a driving voltage generator; wherein the temperature sensor is configured to detect the electroluminescence Displaying a temperature of the panel; the temperature detecting circuit configured to determine whether the detected temperature of the electroluminescent display panel belongs to an operating temperature range; and determining whether the detected temperature of the electroluminescent display panel is greater than a first standard Temperature or determining whether the detected temperature of the electroluminescent display panel is less than a second standard temperature; the first standard temperature is greater than or equal to the second standard temperature; the controller being configured to be responsive to the detected The temperature of the electroluminescent display panel belongs to an operating temperature range and is greater than the first standard temperature, and the driving voltage generator is controlled to output a first driving voltage lower than a standard driving voltage to the electroluminescent display panel; The detected temperature of the electroluminescent display panel belongs to an operating temperature range and is smaller than the second standard Temperature, controlling the
  • the temperature detecting circuit is configured to determine a temperature interval to which the detected temperature of the electroluminescent display panel belongs; the controller is configured to: according to a correspondence between a temperature interval and a driving voltage The driving voltage of the electroluminescence display panel is adjusted to a driving voltage corresponding to the detected temperature interval to which the temperature of the electroluminescent display panel belongs.
  • the number of temperature sensors is at least two.
  • the driving device further includes: a power controller; wherein the power controller is configured to be responsive to the detected temperature of the electroluminescent display panel not belonging to an operating temperature range, The power of the electroluminescent display panel is turned off under the control of the controller.
  • the embodiment of the present disclosure further provides an electroluminescent display panel comprising the above-mentioned driving device provided by the embodiment of the present disclosure; wherein the temperature sensor is located in the electroluminescent display panel.
  • the embodiment of the present disclosure further provides a display device including the above electroluminescent display panel provided by the embodiment of the present disclosure.
  • 1a and 1b are respectively a flowchart of a driving method of an electroluminescent display panel provided in an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a driving device of an electroluminescent display panel according to an embodiment of the present disclosure
  • 3a and 3b are schematic diagrams showing the working principle of a temperature sensor and a temperature detecting circuit provided in an embodiment of the present disclosure
  • FIGS. 4a and 4b are schematic structural views of an electroluminescent display panel provided in an embodiment of the present disclosure.
  • Figure 5 is a schematic illustration of a temperature interval in an embodiment of the present disclosure.
  • the inventors have noted that the luminescent properties of luminescent materials of OLEDs vary with the temperature of the display. When the temperature of the display is lower than the standard temperature, the brightness of the display decreases. Conversely, when the temperature of the display is higher than the standard temperature, the brightness of the display increases. Therefore, when the temperature of the display is different from the standard temperature, the light-emitting state of the OLED display is inconsistent with the light-emitting state at the standard temperature, which affects the display effect of the display.
  • An embodiment of the present disclosure provides a driving method of an electroluminescent display panel, as shown in FIG. 1a, which may include:
  • S104 Adjust a driving voltage of the electroluminescent display panel to a first driving voltage lower than a standard driving voltage
  • step S105 determining whether the detected temperature of the electroluminescent display panel is less than the second standard temperature, the first standard temperature is greater than or equal to the second standard temperature; if so, then executing step S106; if not, executing step S107;
  • the resistance of the cathode metal conductor of the electroluminescent device is increased, so that the cathode voltage of the electroluminescent device is increased, thereby causing the luminance of the electroluminescent device to increase; when the temperature T is lowered At the time, the resistance of the cathode metal conductor of the electroluminescent device is reduced, so that the cathode voltage of the electroluminescent device is reduced, thereby causing the luminance of the electroluminescent device to decrease.
  • the cathode voltage of the electroluminescent device changes accordingly, and the illumination state of the electroluminescent display panel is adjusted by adjusting the driving voltage of the electroluminescent device.
  • the illumination state is always maintained when the temperature is not greater than the first standard temperature and not less than the second standard temperature.
  • the driving method does not need to add a new manufacturing process, and does not affect the display quality of the screen, and only needs to adjust the driving voltage according to the temperature change of the electroluminescent display panel. The normal operation of the electroluminescent display panel is ensured, and the reliability and quality assurance of the electroluminescent display panel are improved.
  • detecting the temperature of the electroluminescent display panel comprises detecting a temperature of the electroluminescent display panel at a set time interval.
  • the temperature of the electroluminescent display panel can be monitored in real time when detecting the temperature of the electroluminescent display panel, but the detection frequency causes the system to consume power. high.
  • the temperature of the electroluminescent display panel can be detected once in a frame display time, and a certain time interval can be selected for detection, such as 50 ms.
  • the detection is once, or once in 100 ms, or once in 200 ms, or once in 500 ms, which is not limited herein.
  • the correspondence between each temperature interval and the driving voltage is set in advance to determine a specific value of the adjusted driving voltage.
  • step S104 adjusts the driving voltage of the electroluminescent display panel to a first driving voltage lower than the standard driving voltage
  • step S106 adjusts the driving voltage of the electroluminescent display panel to a second driving voltage higher than the standard driving voltage.
  • the driving voltage of the electroluminescence display panel is adjusted to a driving voltage corresponding to a temperature range to which the detected temperature of the electroluminescent display panel belongs, according to the correspondence relationship between the temperature interval and the driving voltage.
  • the first standard temperature is greater than the second standard temperature as an example.
  • the limit temperature range R can be divided into three temperature intervals by using the minimum limit temperature Tmin, the second standard temperature T2, the first standard temperature T1, and the maximum limit temperature Tmax, of course, not limited to three temperatures. Interval.
  • a temperature range greater than the first standard temperature T1 and less than or equal to the maximum limit temperature Tmax is taken as the first temperature interval R1; a temperature range greater than or equal to the second standard temperature T2 and less than or equal to the first standard temperature T1 is taken as a standard
  • the temperature interval Rs for example, generally ranges from 25 ° C to 30 ° C (including 25 ° C and 30 ° C) as the standard temperature interval Rs; a temperature range greater than or equal to the minimum limit temperature Tmin and less than the second standard temperature T2 is taken as the second temperature interval R2.
  • the driving voltage corresponding to the first temperature interval R1 is the first driving voltage
  • the driving voltage corresponding to the standard temperature interval Rs is the standard driving voltage
  • the driving voltage corresponding to the second temperature interval R2 is the second driving. Voltage; and, the first driving voltage ⁇ standard driving voltage ⁇ second driving voltage. Therefore, if it is determined that the temperature of the detected electroluminescent display panel belongs to the first temperature interval, the driving voltage of the electroluminescent display panel is adjusted to the first driving voltage corresponding to the first temperature interval.
  • the driving method provided by the embodiment of the present disclosure may further include: determining that the detected temperature of the electroluminescent display panel is at the first standard temperature and the second standard temperature The driving voltage of the electroluminescence display panel is set to a standard driving voltage.
  • step S102 determines that the detected temperature of the electroluminescent display panel does not belong to the operating temperature range, as shown in FIG. 1b.
  • the method may further include: S108 cutting off the power of the electroluminescent display panel.
  • the embodiment of the present disclosure further provides a driving device for an electroluminescent display panel. Since the driving device is similar to the driving method of the foregoing electroluminescent display panel, the specific implementation manner of the driving device can be referred to the above driving method. The embodiments are not repeated here.
  • the driving device 200 may include a temperature sensor 201, a temperature detecting circuit 202, a controller 203, and a driving voltage generator 204.
  • the temperature sensor 201 can be used to detect the temperature of the electroluminescent display panel at set time intervals.
  • the temperature detecting circuit 202 can be configured to determine whether the detected temperature of the electroluminescent display panel belongs to an operating temperature range; determine whether the detected temperature of the electroluminescent display panel is greater than a first standard temperature or determine the detected electroluminescent display Whether the temperature of the panel is less than a second standard temperature; the first standard temperature is greater than or equal to the second standard temperature.
  • the controller 203 can be configured to control the driving voltage generator 204 to output a lower than the standard driving voltage to the electroluminescent display panel when determining that the detected temperature of the electroluminescent display panel belongs to the operating temperature range and is greater than the first standard temperature. a driving voltage; controlling the driving voltage generator 204 to output a second driving higher than the standard driving voltage to the electroluminescent display panel when determining that the detected temperature of the electroluminescent display panel belongs to the operating temperature range and less than the second standard temperature Voltage.
  • the temperature detecting circuit described above is a circuit having a comparator for comparing the temperature detected by the temperature sensor with a preset standard temperature interval to determine the state of the detected temperature of the electroluminescent display panel. So that the controller generates a corresponding control command based on the temperature state so that the driving voltage generator outputs the required driving voltage.
  • the modern central processing unit CPU, single-chip MCU, digital processor DSP, field programmable logic array FPGA and other logic operation processing circuits have built-in functional circuit or logic circuit such as controller and comparator,
  • the temperature detecting circuit 202 and the controller 203 are combined and implemented in a logic operation processing circuit.
  • the temperature sensor 201 transmits a temperature-carrying signal to the temperature detecting circuit 202 after detecting the temperature of the electroluminescent display panel; thereafter, the temperature detecting circuit 202 determines the detected electroluminescent display panel. Whether the temperature belongs to the operating temperature range, and when it is determined that the temperature of the electroluminescent display panel is detected to be within the operating temperature range, determining whether the detected temperature of the electroluminescent display panel is greater than the first standard temperature or determining the detected electroluminescence Whether the temperature of the display panel is less than the second standard temperature, and then converting the determined temperature information into corresponding voltage information for transmission to the controller 203; of course, the first standard temperature may be greater than the second standard temperature, or may be equal to the second standard temperature Then, the controller 203 sends a corresponding control signal to the driving voltage generator 204 according to the determination result transmitted by the received temperature detecting circuit 202, and controls the driving voltage generator 204 to generate a corresponding driving voltage.
  • FIG. 3a a schematic diagram of the operation between temperature sensor 201 and temperature sensing circuit 202 is shown in Figure 3a.
  • the equivalent circuit diagram corresponding to Figure 3a is shown in Figure 3b.
  • R1 represents the external resistor 302
  • R2 represents the detecting resistor 301.
  • the external resistor 302 is located inside the temperature detecting circuit 202 and is a resistor having a fixed resistance value provided to match the detecting resistor 301.
  • the detecting resistor 301 corresponds to the temperature sensor 201, and both the external resistor 302 and the detecting terminal 303 belong to the temperature detecting circuit 202.
  • the temperature detecting circuit 202 transmits the processed result to the controller 203 through the detecting terminal 303, so that the controller 203 controls the driving voltage generator 204 to generate a corresponding driving voltage.
  • the temperature detecting circuit 202 is configured to determine a temperature interval to which the detected temperature of the electroluminescent display panel belongs.
  • the controller 203 is configured to adjust the driving voltage of the electroluminescence display panel to a driving voltage corresponding to the temperature range to which the detected temperature of the electroluminescent display panel belongs, according to the correspondence relationship between the temperature interval and the driving voltage.
  • the number of temperature sensors 201 is at least Two.
  • the driving device 200 may further include: a power controller 205; wherein the power controller 205 is configured to determine that the temperature of the detected electroluminescent display panel does not belong to an operating temperature range The power of the electroluminescent display panel is turned off under the control of the controller 203.
  • the embodiment of the present disclosure further provides an electroluminescent display panel, as shown in FIG. 4a and FIG. 4b, which may include the above-mentioned driving device 200 (inside the dotted line frame) provided by the embodiment of the present disclosure; wherein the temperature sensor 201 is set in the electric The light-emitting display panel 400 is inside.
  • the electroluminescent display panel 400 may include a display area 401 (hatched fill area) and a non-display area 402 (unfilled area).
  • the temperature sensor 201 can be disposed in the non-display area 402.
  • the temperature sensor 201 can also be disposed in the display area 401.
  • the electroluminescent display panel with the temperature sensor 201 is consistent with the process of the conventional electroluminescent display panel, and no additional process is required, which is advantageous for the reduction of manufacturing cost.
  • the temperature detecting circuit 202, the controller 203, the driving voltage generator 204, and the power controller 205 may be disposed on a Print Circuit Board (PCB) 300 and connect the PCB 300 in an external manner.
  • PCB Print Circuit Board
  • the PCB 300 provided with the temperature detecting circuit 202, the controller 203, the driving voltage generator 204, and the power controller 205 may also be disposed in the non-display area 402 of the electroluminescent display panel 400.
  • the temperature detecting circuit 202, the controller 203, the driving voltage generator 204, and the power controller 205 are disposed directly in the non-display area 402 of the electroluminescent display panel 400, as shown in FIG. 4b, which is not limited herein.
  • the embodiment of the present disclosure further provides a display device including the above electroluminescent display panel provided by the embodiment of the present disclosure.
  • the display device can be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • Embodiments of the present disclosure provide an electroluminescence display panel, a driving method thereof, a driving device, and a display device.
  • the cathode voltage of the electroluminescent device changes accordingly.
  • the driving voltage of the electroluminescent device By adjusting the driving voltage of the electroluminescent device, the illumination state of the electroluminescent display panel is always maintained at a temperature not greater than The first standard temperature and not less than the second standard temperature.
  • the driving method does not need to add a new manufacturing process, and does not affect the display quality of the screen, and only needs to adjust the driving voltage according to the temperature change of the electroluminescent display panel. The normal operation of the electroluminescent display panel is ensured, and the reliability and quality assurance of the electroluminescent display panel are improved.

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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)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)

Abstract

一种电致发光显示面板(400)、驱动方法、驱动装置(200)以及显示装置。在确定检测到的电致发光显示面板(400)的温度属于工作温度范围且大于第一标准温度(T1)时，将电致发光显示面板(400)的驱动电压调整为低于标准驱动电压的第一驱动电压；在确定检测到的电致发光显示面板(400)的温度属于工作温度范围且小于第二标准温度(T2)时，将电致发光显示面板(400)的驱动电压调整为高于标准驱动电压的第二驱动电压；其中，第一标准温度(T1)大于或等于第二标准温度(T2)。

Description

电致发光显示面板、其驱动方法、驱动装置以及显示装置
相关申请
本申请要求保护在2017年4月21日提交的申请号为201710265215.X的中国专利申请的优先权，该申请的全部内容以引用的方式结合到本文中。
技术领域
本公开涉及一种电致发光显示面板、其驱动方法、驱动装置以及显示装置。
背景技术
有机发光二极管(Organic Light Emitting Diode，OLED)显示器，因其具有响应速度快、色域宽、视角大、亮度高、以及质轻等特点，备受关注，在有机发光技术领域得到了广泛的应用。
公开内容
本公开实施例提供了一种电致发光显示面板的驱动方法，包括：
检测所述电致发光显示面板的温度；
响应于检测到的所述电致发光显示面板的温度属于工作温度范围且大于第一标准温度，将所述电致发光显示面板的驱动电压调整为低于标准驱动电压的第一驱动电压；
响应于检测到的所述电致发光显示面板的温度属于工作温度范围且小于第二标准温度，将所述电致发光显示面板的驱动电压调整为高于标准驱动电压的第二驱动电压；
所述第一标准温度大于或等于所述第二标准温度。
在一些实施例中，所述将所述电致发光显示面板的驱动电压调整为低于标准驱动电压的第一驱动电压，以及所述将所述电致发光显示面板的驱动电压调整为高于标准驱动电压的第二驱动电压，包括：
确定检测到的所述电致发光显示面板的温度所属的温度区间；
根据温度区间与驱动电压的对应关系，将所述电致发光显示面板的驱动电压调整为与检测到的所述电致发光显示面板的温度所属的温 度区间对应的驱动电压。
在一些实施例中，本公开实施例提供的驱动方法还包括：响应于检测到的所述电致发光显示面板的温度在所述第一标准温度和所述第二标准温度之间，将所述电致发光显示面板的驱动电压设置为标准驱动电压。
在一些实施例中，本公开实施例提供的驱动方法还包括：响应于检测到的所述电致发光显示面板的温度不属于工作温度范围，切断所述电致发光显示面板的电源。
在一些实施例中，检测所述电致发光显示面板的温度包括：按照所选的时间间隔，检测所述电致发光显示面板的温度。
本公开实施例还提供了一种电致发光显示面板的驱动装置，包括：温度传感器、温度检测电路、控制器和驱动电压发生器；其中，所述温度传感器，配置成检测所述电致发光显示面板的温度；所述温度检测电路，配置成确定检测到的所述电致发光显示面板的温度是否属于工作温度范围；确定检测到的所述电致发光显示面板的温度是否大于第一标准温度或确定检测到的所述电致发光显示面板的温度是否小于第二标准温度；所述第一标准温度大于或等于所述第二标准温度；所述控制器，配置成响应于检测到的所述电致发光显示面板的温度属于工作温度范围且大于所述第一标准温度，控制所述驱动电压发生器向所述电致发光显示面板输出低于标准驱动电压的第一驱动电压；响应于检测到的所述电致发光显示面板的温度属于工作温度范围且小于所述第二标准温度，控制所述驱动电压发生器向所述电致发光显示面板输出高于标准驱动电压的第二驱动电压。
在一些实施例中，所述温度检测电路配置成确定检测到的所述电致发光显示面板的温度所属的温度区间；所述控制器配置成根据温度区间与驱动电压的对应关系，将所述电致发光显示面板的驱动电压调整为与检测到的所述电致发光显示面板的温度所属的温度区间对应的驱动电压。
在一些实施例中，所述温度传感器的数量至少为两个。
在一些实施例中，所述驱动装置还包括：电源控制器；其中，所述电源控制器，配置成响应于检测到的所述电致发光显示面板的温度不属于工作温度范围，在所述控制器的控制下切断所述电致发光显示 面板的电源。
本公开实施例还提供了一种电致发光显示面板，包括本公开实施例提供的上述驱动装置；其中，所述温度传感器位于所述电致发光显示面板内。
本公开实施例还提供了一种显示装置，包括本公开实施例提供的上述电致发光显示面板。
附图说明
图1a和图1b分别为本公开实施例中提供的一种电致发光显示面板的驱动方法的流程图；
图2为本公开实施例中提供的一种电致发光显示面板的驱动装置的结构示意图；
图3a和图3b分别为本公开实施例中提供的温度传感器与温度检测电路的工作原理的示意图；
图4a和图4b分别为本公开实施例中提供的一种电致发光显示面板的结构示意图；以及
图5为本公开实施例中的温度区间的示意图。
具体实施方式
下面将结合附图，对本公开实施例提供的一种电致发光显示面板、其驱动方法、驱动装置以及显示装置的具体实施方式进行详细地说明。需要说明的是，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
发明人注意到，OLED的发光材料的发光特性会随着显示器的温度变化而变化。在显示器的温度低于标准温度时，显示器的发光亮度下降。反之，当显示器的温度高于标准温度时，显示器的发光亮度增加。因此，在显示器的温度不同于标准温度时，OLED显示器的发光状态与其在标准温度下的发光状态不一致，影响显示器的显示效果。
本公开实施例提供了一种电致发光显示面板的驱动方法，如图1a所示，可以包括：
S101、检测电致发光显示面板的温度；
S102、确定检测到的电致发光显示面板的温度是否属于工作温度范围；若是，则执行步骤S103；
S103、确定检测到的电致发光显示面板的温度是否大于第一标准温度；若是，则执行步骤S104；若否，则执行步骤S105；
S104、将电致发光显示面板的驱动电压调整为低于标准驱动电压的第一驱动电压；
S105、确定检测到的电致发光显示面板的温度是否小于第二标准温度，第一标准温度大于或等于第二标准温度；若是，则执行步骤S106；若否，则执行步骤S107；
S106、将电致发光显示面板的驱动电压调整为高于标准驱动电压的第二驱动电压；
S107、将电致发光显示面板的驱动电压调整为标准驱动电压。
本公开实施例提供的上述驱动方法，基于公式R t＝R o(1+αT)，其中，T表示温度，α表示电致发光器件的阴极金属导体的电阻温度系数，R o表示电致发光器件的阴极金属导体在0℃时的电阻，R t表示电致发光器件的阴极金属导体在温度为T时的电阻。根据上述公式，当温度T升高时，电致发光器件的阴极金属导体的电阻增大，使得电致发光器件的阴极电压增大，进而使得电致发光器件的发光亮度增加；当温度T降低时，电致发光器件的阴极金属导体的电阻减小，使得电致发光器件的阴极电压减小，进而使得电致发光器件的发光亮度降低。
因此，根据上述分析，在检测到电致发光显示面板的温度发生变化时，电致发光器件的阴极电压随之变化，通过调整电致发光器件的驱动电压，使得电致发光显示面板的发光状态始终保持为温度不大于第一标准温度且不小于第二标准温度时的发光状态。同时，该驱动方法无需增加新的制作工艺，也不会对画面显示品质产生影响，只需要根据电致发光显示面板的温度变化调整驱动电压即可。保证了电致发光显示面板的正常工作，提高了电致发光显示面板的可靠性和品质保证。
在一些实施例中，检测所述电致发光显示面板的温度包括：按照设定的时间间隔，检测所述电致发光显示面板的温度。
例如，为了尽可能保证电致发光显示面板的亮度一致，在检测电 致发光显示面板的温度时，可以对电致发光显示面板的温度进行实时监测，但这种检测频率会造成系统功耗过高。
例如，为了降低系统功耗，同时能够满足电致发光显示面板的亮度保证一致，可以在一帧显示时间内检测一次电致发光显示面板的温度，还可以选择一定的时间间隔进行检测，如50ms检测一次、或100ms检测一次、或200ms检测一次、或是500ms检测一次，在此不作限定。
在一些实施例中，预先设置各温度区间与驱动电压的对应关系，以确定调整后的驱动电压的具体数值。
例如，步骤S104将电致发光显示面板的驱动电压调整为低于标准驱动电压的第一驱动电压，以及步骤S106将电致发光显示面板的驱动电压调整为高于标准驱动电压的第二驱动电压，可以包括：
确定检测到的电致发光显示面板的温度所属的温度区间；
根据温度区间与驱动电压的对应关系，将电致发光显示面板的驱动电压调整为与检测到的电致发光显示面板的温度所属的温度区间对应的驱动电压。
具体地，在温度区间与驱动电压的对应关系中，以第一标准温度大于第二标准温度为例。如图5所示，可以利用最小极限温度Tmin、第二标准温度T2、第一标准温度T1和最大极限温度Tmax将极限温度范围R划分为三个温度区间，当然并不限于划分为三个温度区间。其中，将大于第一标准温度T1且小于或等于最大极限温度Tmax的温度范围作为第一温度区间R1；将大于或等于第二标准温度T2且小于或等于第一标准温度T1的温度范围作为标准温度区间Rs，例如，一般将25℃-30℃(包括25℃和30℃)作为标准温度区间Rs；将大于或等于最小极限温度Tmin且小于第二标准温度T2的温度范围作为第二温度区间R2。
在一些实施例中，与第一温度区间R1对应的驱动电压为第一驱动电压，与标准温度区间Rs对应的驱动电压为标准驱动电压，与第二温度区间R2对应的驱动电压为第二驱动电压；并且，第一驱动电压＜标准驱动电压＜第二驱动电压。因此，若确定检测到的电致发光显示面板的温度属于第一温度区间时，将电致发光显示面板的驱动电压调整为与第一温度区间对应的第一驱动电压。
在一些实施例中，为了降低系统功耗，本公开实施例提供的驱动 方法还可以包括：在确定检测到的电致发光显示面板的温度在所述第一标准温度和所述第二标准温度之间时，将电致发光显示面板的驱动电压设置为标准驱动电压。
在一些实施例中，为了避免电致发光显示面板在温度过高或过低时受到损坏，步骤S102在确定检测到的电致发光显示面板的温度不属于工作温度范围时，如图1b所示，还可以包括：S108切断电致发光显示面板的电源。
本公开实施例还提供了一种电致发光显示面板的驱动装置，由于该驱动装置与前述一种电致发光显示面板的驱动方法相似，故该驱动装置的具体实施方式可参见上述驱动方法中的实施例，重复之处不作赘述。
具体地，本公开实施例提供的上述驱动装置。如图2所示，所述驱动装置200可以包括：温度传感器201、温度检测电路202、控制器203和驱动电压发生器204。
温度传感器201可以用于按照设定的时间间隔，检测电致发光显示面板的温度。
温度检测电路202可以用于确定检测到的电致发光显示面板的温度是否属于工作温度范围；确定检测到的电致发光显示面板的温度是否大于第一标准温度或确定检测到的电致发光显示面板的温度是否小于第二标准温度；第一标准温度大于或等于第二标准温度。
控制器203可以用于在确定检测到的电致发光显示面板的温度属于工作温度范围且大于第一标准温度时，控制驱动电压发生器204向电致发光显示面板输出低于标准驱动电压的第一驱动电压；在确定检测到的电致发光显示面板的温度属于工作温度范围且小于第二标准温度时，控制驱动电压发生器204向电致发光显示面板输出高于标准驱动电压的第二驱动电压。
容易理解，上述的温度检测电路是一种具有比较器的电路，用于将温度传感器检测到的温度与预设的标准温度区间相比较，以判断检测到的电致发光显示面板的温度的状态，从而使得控制器基于温度状态产生相应的控制指令使得驱动电压发生器输出所需的驱动电压。为了简化系统结构，由于现代的中央处理器CPU、单片机MCU、数字处理器DSP、现场可编程逻辑阵列FPGA等逻辑运算处理电路均内置了 控制器、比较器等功能元件电路或逻辑电路，可将温度检测电路202和控制器203合并在逻辑运算处理电路中实现。
在一些实施例中，温度传感器201在检测到电致发光显示面板的温度后，将携带有温度的信号传输至温度检测电路202；之后，温度检测电路202确定检测到的电致发光显示面板的温度是否属于工作温度范围，在确定检测到电致发光显示面板的温度属于工作温度范围时，继续确定检测到的电致发光显示面板的温度是否大于第一标准温度或确定检测到的电致发光显示面板的温度是否小于第二标准温度，然后将确定后的温度信息转换成对应的电压信息传输至控制器203；当然，第一标准温度可以大于第二标准温度，也可以等于第二标准温度；接着，控制器203根据接收到的温度检测电路202传输的确定结果，向驱动电压发生器204发送相应的控制信号，控制驱动电压发生器204产生相应的驱动电压。
例如，温度传感器201和温度检测电路202之间的工作原理的示意图如图3a所示。与图3a对应的等效电路图如图3b所示。其中，R1表示外挂电阻302，R2表示检测电阻301。外挂电阻302位于温度检测电路202的内部，是为匹配检测电阻301而设置的具有固定电阻值的电阻。检测电阻301相当于温度传感器201，外挂电阻302和检测端303均属于温度检测电路202。当电致发光显示面板的温度降低，同时属于极限温度范围且小于第二标准温度时，即检测电阻301的电阻值降低，相应的检测端303的电压值减小。当电致发光显示面板的温度升高，同时属于极限温度范围且大于第一标准温度时，即检测电阻301的电阻值增大，相应的检测端303的电压值增大。之后，温度检测电路202将处理后的结果通过检测端303传输至控制器203，以使控制器203控制驱动电压发生器204产生相应地驱动电压。
在一些实施例中，在本公开实施例提供的上述驱动装置中，温度检测电路202用于确定检测到的电致发光显示面板的温度所属的温度区间。
控制器203用于根据温度区间与驱动电压的对应关系，将电致发光显示面板的驱动电压调整为与检测到的电致发光显示面板的温度所属的温度区间对应的驱动电压。
当电致发光显示面板的尺寸较大时，若设置一个温度传感器201， 可能会造成检测到的电致发光显示面板的温度不准确；因此，在一些实施例中，温度传感器201的数量至少为两个。
在一些实施例中，如图2所示，驱动装置200还可以包括：电源控制器205；其中，电源控制器205用于在确定检测到的电致发光显示面板的温度不属于工作温度范围时，在控制器203的控制下切断电致发光显示面板的电源。
本公开实施例还提供了一种电致发光显示面板，如图4a和图4b所示，可以包括本公开实施例提供的上述驱动装置200(虚线框内)；其中，温度传感器201设置于电致发光显示面板400内。
例如，如图4a和图4b所示，电致发光显示面板400可以包括显示区域401(斜线填充区域)和非显示区域402(未填充区域)。温度传感器201可以设置于非显示区域402内，例如，温度传感器201还可以设置于显示区域401内。
在一些实施例中，带有温度传感器201的电致发光显示面板与常规电致发光显示面板的制程一致，无需增加额外的工艺制程，有利于制作成本的降低。
在一些实施例中，温度检测电路202、控制器203、驱动电压发生器204和电源控制器205可以设置于印刷电路板(Print Circuit Board，PCB)300上，并将PCB 300采用外挂的方式连接于电致发光显示面板400的一侧，如图4a所示。
在一些实施例中，还可以将设置有温度检测电路202、控制器203、驱动电压发生器204和电源控制器205的PCB 300设置于电致发光显示面板400的非显示区域402内。或者，将温度检测电路202、控制器203、驱动电压发生器204和电源控制器205直接设置于电致发光显示面板400的非显示区域402内，如图4b所示，在此不作限定。
本公开实施例还提供了一种显示装置，包括本公开实施例提供的上述电致发光显示面板。该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。该显示装置的实施可以参见上述有机发光显示面板的实施例，重复之处不再赘述。
本公开实施例提供了一种电致发光显示面板、其驱动方法、驱动装置以及显示装置。在检测到电致发光显示面板的温度发生变化时， 电致发光器件的阴极电压随之变化，通过调整电致发光器件的驱动电压，使得电致发光显示面板的发光状态始终保持为温度不大于第一标准温度且不小于第二标准温度时的发光状态。同时，该驱动方法无需增加新的制作工艺，也不会对画面显示品质产生影响，只需要根据电致发光显示面板的温度变化调整驱动电压即可。保证了电致发光显示面板的正常工作，提高了电致发光显示面板的可靠性和品质保证。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (11)

  1. 一种电致发光显示面板的驱动方法，包括：
    检测所述电致发光显示面板的温度；
    响应于检测到的所述电致发光显示面板的温度属于工作温度范围且大于第一标准温度，将所述电致发光显示面板的驱动电压调整为低于标准驱动电压的第一驱动电压；
    响应于检测到的所述电致发光显示面板的温度属于工作温度范围且小于第二标准温度，将所述电致发光显示面板的驱动电压调整为高于标准驱动电压的第二驱动电压；
    其中，所述第一标准温度大于或等于所述第二标准温度。
  2. 如权利要求1所述的驱动方法，其中，所述将所述电致发光显示面板的驱动电压调整为低于标准驱动电压的第一驱动电压，以及所述将所述电致发光显示面板的驱动电压调整为高于标准驱动电压的第二驱动电压，包括：
    确定检测到的所述电致发光显示面板的温度所属的温度区间；
    根据温度区间与驱动电压的对应关系，将所述电致发光显示面板的驱动电压调整为与检测到的所述电致发光显示面板的温度所属的温度区间对应的驱动电压。
  3. 如权利要求1或2所述的驱动方法，还包括：
    在一种可能的实施方式中检测到的所述电致发光显示面板的温度在所述第一标准温度和所述第二标准温度之间，将所述电致发光显示面板的驱动电压设置为标准驱动电压。
  4. 如权利要求1或2所述的驱动方法，还包括：
    响应于检测到的所述电致发光显示面板的温度不属于工作温度范围，切断所述电致发光显示面板的电源。
  5. 如权利要求1或2所述的驱动方法，其中，检测所述电致发光显示面板的温度包括：按照所选的时间间隔，检测所述电致发光显示面板的温度。
  6. 一种电致发光显示面板的驱动装置，包括：温度传感器、温度检测电路、控制器和驱动电压发生器；其中，
    所述温度传感器，配置成检测所述电致发光显示面板的温度；
    所述温度检测电路，配置成确定检测到的所述电致发光显示面板的温度是否属于工作温度范围；确定检测到的所述电致发光显示面板的温度是否大于第一标准温度或确定检测到的所述电致发光显示面板的温度是否小于第二标准温度；所述第一标准温度大于或等于所述第二标准温度；
    所述控制器，配置成响应于检测到的所述电致发光显示面板的温度属于工作温度范围且大于所述第一标准温度，控制所述驱动电压发生器向所述电致发光显示面板输出低于标准驱动电压的第一驱动电压；响应于检测到的所述电致发光显示面板的温度属于工作温度范围且小于所述第二标准温度，控制所述驱动电压发生器向所述电致发光显示面板输出高于标准驱动电压的第二驱动电压。
  7. 如权利要求6所述的驱动装置，其中，所述温度检测电路，配置成确定检测到的所述电致发光显示面板的温度所属的温度区间；
    所述控制器，配置成根据温度区间与驱动电压的对应关系，将所述电致发光显示面板的驱动电压调整为与检测到的所述电致发光显示面板的温度所属的温度区间对应的驱动电压。
  8. 如权利要求6所述的驱动装置，其中，所述温度传感器的数量至少为两个。
  9. 如权利要求6-8任一项所述的驱动装置，还包括：电源控制器；其中，
    所述电源控制器，配置成响应于检测到的所述电致发光显示面板的温度不属于工作温度范围，在所述控制器的控制下切断所述电致发光显示面板的电源。
  10. 一种电致发光显示面板，包括如权利要求6-9任一项所述的驱动装置；其中，所述温度传感器位于所述电致发光显示面板内。
  11. 一种显示装置，包括如权利要求10所述的电致发光显示面板。
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