WO2014172961A1 - 供电电路和显示装置 - Google Patents

供电电路和显示装置 Download PDF

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Publication number
WO2014172961A1
WO2014172961A1 PCT/CN2013/076804 CN2013076804W WO2014172961A1 WO 2014172961 A1 WO2014172961 A1 WO 2014172961A1 CN 2013076804 W CN2013076804 W CN 2013076804W WO 2014172961 A1 WO2014172961 A1 WO 2014172961A1
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Prior art keywords
power supply
power
module
voltage
signal
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PCT/CN2013/076804
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English (en)
French (fr)
Inventor
解红军
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京东方科技集团股份有限公司
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Priority to US14/241,638 priority Critical patent/US9318046B2/en
Publication of WO2014172961A1 publication Critical patent/WO2014172961A1/zh

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Classifications

    • 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]
    • 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
    • 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
    • G09G2330/025—Reduction of instantaneous peaks of current
    • 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
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

Definitions

  • the present invention relates to an AMOLED display technology, and more particularly to a power supply circuit and a display device. Background technique
  • the Active Matrix/Organic Light Emitting Diode (AMOLED) display device has a defect. Many advantages and application differences. AMOLED display devices are more colorful and have a wider gamut. And the AMOLED display device is a self-luminous device and does not require a backlight module.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • FIG. 1 is a schematic structural view of an AMOLED display device in the prior art.
  • the AMOLED display device includes: a power source 1 and an AMOLED panel 6 connected to the power source 1.
  • the power supply 1 directly supplies power to the AMOLED panel to cause the AMOLED panel 6 to display a picture.
  • the AMOLED display device is a self-luminous device, the electroluminescence layer (electroluminescence) of the dark region in the displayed image has a small luminance, low current, low power consumption, and is bright in the displayed image.
  • the EL layer of the state region has high luminance, large current, and high power consumption.
  • the overall power consumption fluctuates greatly. That is, the power consumption of the AMOLED display device is high and low as the picture changes, which is unstable.
  • FIG 2 is a graph showing the power consumption of the power supply 1 of Figure 1.
  • the power consumption of the power supply 1 in the prior art fluctuates greatly as the power consumption of the AMOLED display device changes. On the one hand, this causes the power supply 1 to be difficult to operate stably, and thus the life is reduced; on the other hand, the sharply varying power consumption causes the electromagnetic radiation (electron-Magnetic Interference, EMI) characteristics of the product to deteriorate.
  • EMI electromagnetic radiation
  • the invention provides a power supply circuit and a display device for improving the life of the power source And improve the EMI characteristics of the product.
  • a power supply circuit including: a power supply, a charge and discharge module, and a detection module, wherein the power source is connected to the detection module, and the charge and discharge module is respectively connected to the power source and the detection module Connection;
  • the detecting module is configured to detect a detection parameter on the power supply path, feed back a corresponding mode signal to the power source according to the detected detection parameter, and output a preset working voltage to the load, where the mode signal includes a low power signal or a high Power signal
  • the power source is configured to receive a mode signal fed back by the detecting module, output a power supply voltage corresponding to the mode signal according to the mode signal, and charge the charging and discharging module when the mode signal is a low power signal ;
  • the charging and discharging module is configured to discharge to the detecting module when the power source outputs a power supply voltage corresponding to the high power signal, and perform charging when the power source outputs a power supply voltage corresponding to the low power signal.
  • the detecting module is configured to detect a detection parameter on the power supply path, and determine whether the detection parameter is greater than a preset threshold parameter, and if the detection parameter is greater than the threshold parameter, the detection module Returning the high power signal to the power source, if the detection parameter is less than or equal to the threshold parameter, the detecting module feeds back the low power signal to the power source; and the detecting module outputs the load to the load The working voltage.
  • the detecting module includes: a determining module and a working voltage output module, wherein the determining module is connected to the power source, and the working voltage output module is connected to the load; wherein:
  • the determining module is configured to detect a detection parameter on the power supply path, determine whether the detection parameter is greater than a preset threshold parameter, and if the detection parameter is greater than the threshold parameter, feed back the high power signal to the power source And if the detection parameter is less than or equal to the threshold parameter, feeding back the low power signal to the power source;
  • the operating voltage output module is configured to output the operating voltage to the load.
  • the determining module includes: a power resistor and a differential pressure detecting module, wherein an input end of the power resistor is connected to the power source, and an output end of the power resistor is connected to the working voltage output module, where the voltage is The input of the difference detection module and the power supply respectively The input end of the resistor is connected to the output end of the power resistor, and the output end of the differential pressure detecting module is connected to the power source;
  • the differential pressure detecting module is configured to detect a pressure difference between an input end and an output end of the power resistor, according to the pressure difference value and The resistance value of the power resistor generates the current value, and determines whether the current value is greater than the threshold current, and if the current value is greater than the threshold current, feeding back the high power signal to the power source, if And the current value is less than or equal to the threshold current, and the low power signal is fed back to the power source;
  • the differential pressure detecting module is configured to detect a pressure difference value between an input end and an output end of the power resistor, and determine the Whether the pressure difference is greater than the threshold voltage, and if the pressure difference is greater than the threshold voltage, feeding back the high power signal to the power source, if the pressure difference is less than or equal to the threshold voltage, then The power source feeds back the low power signal.
  • a power supply voltage corresponding to the mode signal is a high level
  • the power supply voltage corresponding to the mode signal is at a level of .
  • the difference between the high level and the ⁇ level is 0. IV.
  • the power source charges the charging and discharging module, when the power supply voltage is less than a charging threshold voltage of the charging and discharging module, The power source discharges the charging and discharging module; the charging threshold voltage of the charging and discharging module is greater than the low level and smaller than the high level.
  • the charging and discharging module is a charging and discharging battery.
  • the load comprises an AM0 LED panel.
  • a display device comprising: the power supply circuit and a load connected to the power supply circuit.
  • the power supply charges the charging and discharging module when the detecting module detects that the mode signal is a low power signal, and the charging and discharging module when the detecting module detects that the mode signal is a high power signal
  • the detection module is discharged, and The detection module outputs a preset operating voltage to the load.
  • FIG. 1 is a schematic structural view of an AM0LED display device in the prior art
  • Figure 2 is a power consumption graph of the power supply of Figure 1;
  • FIG. 3 is a schematic structural diagram of a power supply circuit according to a first embodiment of the present invention.
  • Figure 4 is a schematic view of a working circuit of the power supply circuit of Figure 3;
  • FIG. 5 is another schematic diagram of the operation of the power supply circuit of FIG. 3;
  • Figure 6 is a schematic structural view of the detecting module of Figure 3;
  • Figure 7 is a power consumption graph of the power supply of Figure 3.
  • FIG. 8 is a schematic structural diagram of a display device according to a second embodiment of the present invention. detailed description
  • FIG. 3 is a schematic structural view of a power supply circuit according to a first embodiment of the present invention
  • FIG. 4 is a schematic diagram of a working circuit of the power supply circuit of FIG. 3
  • FIG. 5 is another schematic diagram of the working circuit of the power supply circuit of FIG.
  • the power supply circuit comprises: a power supply 1, a charge and discharge module 2 and a detection module 3, the power supply 1 is connected to the detection module 3, and the charge and discharge module 2 is respectively connected to the power supply 1 and the detection module 3. .
  • the detecting module 3 is configured to detect a detection parameter on the power supply path, feed back a corresponding mode signal to the power source 1 according to the detected detection parameter, and output a preset working voltage to the load 4, and the mode signal may include a low power signal or a high power signal.
  • the low power signal indicates that the power supply circuit enters the low power mode
  • the high power signal indicates that the power supply circuit enters the high power mode.
  • the low power signal may be a low level
  • the high power signal may be a high level.
  • the load 4 may be an AM0 LED panel, and the AM0 LED panel may display a picture according to the working voltage.
  • the detecting module 3 can be configured to detect a detection parameter on the power supply path, and determine whether the detection parameter is greater than a preset threshold parameter. If the detection parameter is greater than the threshold parameter, the detection module 3 feeds back the high power signal to the power source 1. If the detection parameter is less than or equal to the threshold parameter, the detection module 3 feeds back the low power signal to the power source 1; and the detection module 3 to the load 4 output working voltage.
  • the detecting module 3 includes: a determining module 31 and an operating voltage output module 32.
  • the determining module 31 is connected to the power source 1, and the working voltage output module 32 is connected to the load 4.
  • the determining module 31 is configured to detect a detection parameter on the power supply path, determine whether the detection parameter is greater than a preset threshold parameter, and if the detection parameter is greater than the threshold parameter, feed back a high power signal to the power source 1, and if the detection parameter is less than or equal to the threshold parameter, Then, the low power signal is fed back to the power source 1; the operating voltage output module 32 is used to output the working voltage to the load.
  • the detection parameter may be a current value, and the threshold parameter is a threshold current; or the detection parameter may be a pressure difference value, and the threshold parameter is a threshold voltage.
  • the operating voltage can be preset according to requirements, and the working voltage output module 32 outputs a uniform working voltage regardless of whether in the low power mode or the high power mode, so the working voltage output module 32 realizes the uniformity of the output voltage.
  • the determining module 31 may include: a power resistor and a differential pressure detecting module 311, wherein the input end of the power resistor is connected to the power source 1, and the output end of the power resistor is connected to the working voltage output module 32, and the input end of the differential pressure detecting module 31 1 The input end of the power resistor and the output end of the power resistor are respectively connected, and the output end of the differential pressure detecting module 311 is connected to the power source 1.
  • the differential pressure detecting module 311 is configured to detect a pressure difference between the input end and the output end of the power resistor, according to the pressure difference value and the resistance value of the power resistor. The current value is generated, and it is determined whether the current value is greater than the threshold current. If the current value is greater than the threshold current, the high power signal is fed back to the power source 1, and when the current value is less than or equal to the threshold current, the low power signal is fed back to the power source 1.
  • the differential value can be divided by the resistance of the power resistor to obtain the current value.
  • the differential pressure detecting module 311 is configured to detect a pressure difference between the input end and the output end of the power resistor, and determine whether the pressure difference value is greater than a threshold voltage. If the voltage difference is greater than the threshold voltage, the high power signal is fed back to the power source 1. If the voltage difference is less than or equal to the threshold voltage, the low power signal is fed back to the power source 1.
  • the power source 1 is configured to receive the mode signal fed back by the detecting module 3, and input according to the mode signal. A supply voltage corresponding to the mode signal is output, and the charge and discharge module 2 is charged when the mode signal is a low power signal.
  • the power supply voltage corresponding to the high power signal is smaller than the power supply voltage corresponding to the low power signal. Specifically, as shown in FIG. 4, if the mode signal is a low power signal, the power supply voltage corresponding to the low power signal is at a high level; as shown in FIG. 5, if the mode signal is a high power signal, corresponding to the high power signal The supply voltage is low. 1 ⁇ In practical applications, preferably, the difference between the high level and the low level is 0. 1V. As shown in FIG. 4, the power source 1 charges the charge and discharge module 2 when the mode signal is a low power signal.
  • the charging and discharging module 2 is configured to discharge to the detecting module 3 when the power source 1 outputs a power supply voltage corresponding to the high power signal, and charge when the power source 1 outputs a power supply voltage corresponding to the low power signal.
  • the mode signal is a low power signal
  • the power supply voltage corresponding to the low power signal is greater than the charging threshold voltage
  • the charging and discharging module 2 performs charging; or, when the mode signal is a high power signal, the power supply voltage corresponding to the low power signal
  • the charging threshold voltage is less than the charging threshold voltage
  • the charging and discharging module 2 discharges to the detecting module 3.
  • the charging threshold voltage is greater than the low level and less than the high level.
  • the charging and discharging mechanism of the charging and discharging module 2 is automatically realized, and charging or discharging depends on the charging and discharging module.
  • the voltage of the connected line The selection of the charge and discharge module 2 requires consideration of the charge threshold voltage, charge time, and capacity.
  • the charging threshold voltage should be set between the power supply voltage corresponding to the low power signal and the power supply voltage corresponding to the low power signal, so as to ensure that the power supply voltage is greater than the charging threshold voltage when the power supply circuit is in the low power mode, and the charging and discharging module 2 enters.
  • the line level is lower than the charging threshold voltage, and the charging and discharging module 2 enters the discharging state. At this time, the charging and discharging module 2 can serve as the second power source of the power supply circuit.
  • the charging time of the charging and discharging module 2 is longer, the slower the battery cycle is performed, which will lose the meaning of the charging and discharging module 2, so that the charging time of the charging and discharging module 2 is as small as possible.
  • the capacity of the charging and discharging module 2 is related to the power consumption of the display screen, generally, the larger the difference between the high peak value and the low peak value of the display power consumption, the larger the capacity of the charging and discharging module 2 needs to be set.
  • the power supply 1 charges the charging and discharging module 2; when the power supply circuit is in the high power mode (ie: the mode signal is a high power signal) When the charge and discharge module 2 discharges to the detection module 3.
  • the power supply circuit is in high power mode and low Switching between the power modes, thereby realizing the energy storage of the charge and discharge module 2 - releasing a storage-energy release cycle.
  • the charging and discharging module 2 is used to realize a circulating mechanism for storing energy in a low power mode and releasing in a high power mode. This compensates for the energy requirements in high power mode and does not increase the power of the power supply 1. In the low power mode, the power of the power supply 1 is not lowered too much, so that the power supply 1 is always operating in a stable state.
  • FIG. 7 is a power consumption graph of the power supply of FIG. 3. As shown in FIG. 7, compared with the power consumption graph of the prior art power supply of FIG. 2, the power consumption of the power supply 1 in this embodiment is dependent on the power of the load 4. The fluctuations in consumption are slightly fluctuating.
  • the power source 1 only has a source (Source) mode of operation, and does not have a sink mode. Therefore, when the voltage output from the charge and discharge module 2 is higher than the set voltage of the power source 1, the power source 1 does not pick up. The current does not cause a large current phenomenon in which current flows in the direction of the power source 1.
  • Source source
  • the charge and discharge module 2 is a charge and discharge battery.
  • the power supply charges the charging and discharging module when the detecting module detects that the mode signal is a low power signal, and the charging and discharging module to the detecting module when the detecting module detects that the mode signal is a high power signal. Discharge, and the detection module outputs a preset operating voltage to the load.
  • FIG. 8 is a schematic structural view of a display device according to a second embodiment of the present invention.
  • the display device includes: a power supply circuit 5 and a load 4 connected to the power supply circuit 5.
  • the power supply circuit 5 adopts the power supply circuit of the first embodiment described above, and details are not described herein again.
  • the power source charges the charging and discharging module
  • the charging and discharging module goes to the detecting module. Discharge, and the detection module outputs a preset operating voltage to the load.

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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)
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Abstract

一种供电电路和显示装置。该供电电路包括电源（1）、充放电模块（2）和检测模块（3）；检测模块，用于检测供电路径上的检测参数，根据所检测的检测参数向电源反馈相应的模式信号，并向负载（4）输出预先设置的工作电压；电源，用于接收检测模块反馈的模式信号，根据模式信号输出与模式信号对应的供电电压，并当模式信号为低功率信号时对充放电模块进行充电；充放电模块，用于当电源输出与高功率信号对应的供电电压时向检测模块放电，当电源输出与低功率信号对应的供电电压时进行充电。该供电电路可有效避免电源的功耗随着负载功耗的变化而大幅波动，使电源可以稳定工作。

Description

供电电路和显示装置
技术领域
本发明涉及 AMOLED显示技术， 特别涉及一种供电电路和显示装 置。 背景技术
相比于传统的薄膜晶体管液晶显示器 （Thin Film Transistor Liquid Crystal Display, 筒称 TFT- LCD ) , 有源矩阵有机发光二 极体（ Active Matrix/Organic Light Emitting Diode,筒称： AMOLED ) 显示装置具有艮多的优点以及应用差异。 AMOLED 显示装置色彩更加 绚丽， 色域更宽。 并且 AMOLED显示装置是自发光器件， 不需要背光 模组。
图 1为现有技术中 AMOLED显示装置的结构示意图。如图 1所示， 该 AMOLED显示装置包括： 电源 1和与电源 1连接的 AMOLED面板 6。 电源 1直接向 AMOLED面板供电， 以使 AMOLED面板 6显示画面。 由于 AMOLED 显示装置是自发光器件， 所以在显示的画面中暗态区域的电 致发光层 ( electroluminescence, 筒称： EL ) 亮度^ ί氐， 电流小， 功 耗低； 而在显示的画面中亮态区域的 EL层亮度高， 电流大， 功耗高。 当整个 AMOLED显示装置上亮态画面有增减时， 就会使整体功耗大幅 波动， 即 AMOLED显示装置的功耗会随着画面变化而时高时低， 不稳 定。
图 2为图 1中电源 1的功耗曲线图。 如图 2所示， 现有技术中 电源 1的功耗会随着 AMOLED显示装置的功耗的变化而大幅波动。 一 方面， 这导致电源 1难以稳定工作， 从而寿命降低； 另一方面， 急剧 变化的功耗会造成产品的 电磁辐射 ( Electron-Magnetic Interference, 筒称： EMI )特性变差。 发明内容
本发明提供一种供电电路和显示装置， 用于提高电源的寿命以 及提高产品的 EMI特性。
按照本发明的一个方面， 提供了一种供电电路， 包括： 电源、 充放电模块、检测模块， 所述电源与所述检测模块连接， 所述充放电 模块分别与所述电源和所述检测模块连接； 其中：
所述检测模块用于检测供电路径上的检测参数， 根据所检测的 检测参数向所述电源反馈相应的模式信号，并向负载输出预先设置的 工作电压， 所述模式信号包括低功率信号或高功率信号；
所述电源用于接收所述检测模块反馈的模式信号， 根据所述模 式信号输出与所述模式信号对应的供电电压，并当所述模式信号为低 功率信号时对所述充放电模块进行充电；
所述充放电模块用于当所述电源输出与高功率信号对应的供电 电压时向所述检测模块放电，当所述电源输出与低功率信号对应的供 电电压时进行充电。
可选地， 所述检测模块用于检测供电路径上的检测参数， 并判 断所述检测参数是否大于预先设定的阈值参数，若所述检测参数大于 所述阈值参数，所述检测模块将所述高功率信号反馈给所述电源，若 所述检测参数小于或者等于所述阈值参数，所述检测模块将所述低功 率信号反馈给所述电源；以及所述检测模块向所述负载输出所述工作 电压。
可选地， 所述检测模块包括： 判断模块和工作电压输出模块， 所述判断模块与所述电源连接，所述工作电压输出模块与所述负载连 接； 其中：
所述判断模块用于检测供电路径上的检测参数， 判断所述检测 参数是否大于预先设定的阈值参数，若所述检测参数大于所述阈值参 数，则向所述电源反馈所述高功率信号，若所述检测参数小于或者等 于所述阈值参数， 则向所述电源反馈所述低功率信号；
所述工作电压输出模块用于向所述负载输出所述工作电压。 可选地， 所述判断模块包括： 功率电阻和压差检测模块， 所述 功率电阻的输入端与所述电源连接，所述功率电阻的输出端与所述工 作电压输出模块连接，所述压差检测模块的输入端分别与所述功率电 阻的输入端和所述功率电阻的输出端连接，所述压差检测模块的输出 端与所述电源连接；
所述检测参数为电流值且所述阈值参数为阈值电流时， 所述压 差检测模块用于检测所述功率电阻的输入端和输出端之间的压差值， 根据所述压差值和所述功率电阻的阻值生成所述电流值，并判断所述 电流值是否大于所述阈值电流，若所述电流值大于所述阈值电流，则 向所述电源反馈所述高功率信号，若所述电流值小于或者等于所述阈 值电流， 则向所述电源反馈所述低功率信号；
或者， 所述检测参数为压差值且所述阈值参数为阈值电压时， 所述压差检测模块用于检测所述功率电阻的输入端和输出端之间的 压差值，并判断所述压差值是否大于所述阈值电压，若所述压差值大 于所述阈值电压，则向所述电源反馈所述高功率信号，若所述压差值 小于或者等于所述阈值电压， 则向所述电源反馈所述低功率信号。
可选地， 所述模式信号为所述低功率信号时， 与所述模式信号 对应的供电电压为高电平；
所述模式信号为所述高功率信号时， 与所述模式信号对应的供 电电压为氏电平。
可选地， 所述高电平与所述^ 电平的差值为 0. IV。
可选地， 当供电电压大于所述充放电模块的充电阈值电压时， 所述电源对所述充放电模块进行充电，当所述供电电压小于所述充放 电模块的充电阈值电压时，所述电源对所述充放电模块进行放电； 所 述充放电模块的充电阈值电压大于所述低电平且小于所述高电平。
可选地， 所述充放电模块为充放电电池。
可选地， 所述负载包括 AM0LED面板。
按照本发明的另一方面， 还提供了一种显示装置， 包括： 上述 供电电路和与所述供电电路连接的负载。
本发明具有以下有益效果：
本发明提供的供电电路和显示装置的技术方案中， 在检测模块 检测出模式信号为低功率信号时电源对充放电模块进行充电，在检测 模块检测出模式信号为高功率信号时充放电模块向检测模块放电，且 检测模块向负载输出预先设置的工作电压。此方案可有效避免电源的 功耗随着负载功耗的变化而大幅波动，使得电源可稳定工作，从而提 高了电源的寿命， 并提高了产品的 EMI特性。 附图说明
图 1为现有技术中 AM0LED显示装置的结构示意图；
图 2为图 1中电源的功耗曲线图；
图 3为本发明第一实施例的一种供电电路的结构示意图;
图 4为图 3中供电电路的一种工作示意图；
图 5为图 3中供电电路的另一种工作示意图；
图 6为图 3中检测模块的结构示意图；
图 7为图 3中电源的功耗曲线图；
图 8为本发明第二实施例的一种显示装置的结构示意图。 具体实施方式
为使本领域的技术人员更好地理解本发明的技术方案， 下面结 合附图对本发明提供的供电电路和显示装置进行详细描述。
图 3 为本发明第一实施例的一种供电电路的结构示意图， 图 4 为图 3中供电电路的一种工作示意图，图 5为图 3中供电电路的另一 种工作示意图。 如图 3、 图 4和图 5所示， 该供电电路包括： 电源 1、 充放电模块 2和检测模块 3 , 电源 1与检测模块 3连接， 充放电模块 2分别与电源 1和检测模块 3连接。
检测模块 3用于检测供电路径上的检测参数， 根据所检测的检 测参数向电源 1反馈相应的模式信号，并向负载 4输出预先设置的工 作电压，模式信号可包括低功率信号或高功率信号。 其中， 低功率信 号表征供电电路进入低功率模式，高功率信号表征供电电路进入高功 率模式，例如：低功率信号可以为低电平，高功率信号可以为高电平。 本发明实施例中， 负载 4可以为 AM0LED面板， AM0LED面板可根据该 工作电压显示画面。 本实施例中， 具体地，检测模块 3可用于检测供 电路径上的检测参数， 并判断检测参数是否大于预先设定的阈值参 数，若检测参数大于阈值参数时，检测模块 3将高功率信号反馈给电 源 1 , 若检测参数小于或者等于阈值参数时， 检测模块 3将低功率信 号反馈给电源 1 ; 以及检测模块 3向负载 4输出工作电压。
图 6为图 3中检测模块的结构示意图，如图 6所示，检测模块 3 包括： 判断模块 31和工作电压输出模块 32 , 判断模块 31和电源 1 连接，工作电压输出模块 32与负载 4连接。判断模块 31用于检测供 电路径上的检测参数， 判断检测参数是否大于预先设定的阈值参数， 若检测参数大于阈值参数，则向电源 1反馈高功率信号，若检测参数 小于或者等于阈值参数，则向电源 1反馈低功率信号； 工作电压输出 模块 32用于向负载输出工作电压。 其中， 检测参数可以为电流值， 则阈值参数为阈值电流； 或者， 检测参数可以为压差值， 则阈值参数 为阈值电压。 其中， 工作电压可根据需要预先设置， 工作电压输出模 块 32无论在低功率模式下还是在高功率模式下均输出统一的工作电 压， 因此该工作电压输出模块 32实现了输出电压的统一性。
具体地， 判断模块 31可包括： 功率电阻和压差检测模块 311 , 功率电阻的输入端与电源 1连接，功率电阻的输出端与工作电压输出 模块 32连接， 压差检测模块 31 1的输入端分别与功率电阻的输入端 和功率电阻的输出端连接,压差检测模块 311的输出端与电源 1连接。
可选地， 检测参数为电流值且阈值参数为阈值电流时， 压差检 测模块 311用于检测功率电阻的输入端和输出端之间的压差值，根据 压差值和功率电阻的阻值生成电流值，并判断电流值是否大于阈值电 流，若电流值大于阈值电流时向电源 1反馈高功率信号，若电流值小 于或者等于阈值电流时向电源 1反馈低功率信号。其中，可将压差值 除以功率电阻的阻值以得出电流值。
可选地， 检测参数为压差值且阈值参数为阈值电压时， 压差检 测模块 311用于检测功率电阻的输入端和输出端之间的压差值，并判 断压差值是否大于阈值电压， 若压差值大于阈值电压， 则向电源 1 反馈高功率信号，若压差值小于或者等于阈值电压，则向电源 1反馈 低功率信号。
电源 1用于接收检测模块 3反馈的模式信号， 根据模式信号输 出与模式信号对应的供电电压，并当模式信号为低功率信号时对充放 电模块 2进行充电。其中，与高功率信号对应的供电电压小于与低功 率信号对应的供电电压。 具体地， 如图 4所示， 若模式信号为低功率 信号， 与低功率信号对应的供电电压为高电平； 如图 5所示， 若模式 信号为高功率信号，与高功率信号对应的供电电压为低电平。在实际 应用中， 优选地， 高电平与低电平的差值为 0. 1V。 如图 4所示， 当 模式信号为低功率信号时电源 1对充放电模块 2进行充电。
如图 5和图 6所示， 充放电模块 2用于当电源 1输出与高功率 信号对应的供电电压时向检测模块 3放电，当电源 1输出与低功率信 号对应的供电电压时进行充电， 当模式信号为低功率信号时，与低功 率信号对应的供电电压大于充电阈值电压，此时充放电模块 2进行充 电； 或者， 当模式信号为高功率信号时， 与低功率信号对应的供电电 压小于充电阈值电压，此时充放电模块 2向检测模块 3进行放电。其 中， 充电阈值电压大于低电平且小于高电平。 本实施例中， 充放电模 块 2的充放电机制是自动实现的，充电还是放电取决于该充放电模块
2所连接的线路的电压。充放电模块 2的选择需要考虑充电阈值电压、 充电时间和容量。充电阈值电压应设置于与低功率信号对应的供电电 压和与低功率信号对应的供电电压之间，这样才能一方面保证供电电 路处于低功率模式时供电电压大于充电阈值电压，充放电模块 2进入 充电状态；另一方面保证供电电路处于高功率模式时线路电平小于充 电阈值电压，充放电模块 2进入放电状态，此时充放电模块 2可作为 供电电路的第二电源。由于充放电模块 2的充电时间越长表明电池循 环工作的步伐越慢，这将失去充放电模块 2存在的意义， 因此充放电 模块 2的充电时间越少越好。由于充放电模块 2的容量和显示屏的功 耗大小有关，通常显示屏功耗的高峰值和低峰值差异越大，充放电模 块 2的容量就需要设置的越大。
本实施例中， 当供电电路处于低功率模式（即： 模式信号为低 功率信号）时， 电源 1对充放电模块 2进行充电； 当供电电路处于高 功率模式（即： 模式信号为高功率信号）时， 充放电模块 2向检测模 块 3放电。 当显示画面发生动态变化时，供电电路在高功率模式和低 功率模式之间切换，从而实现充放电模块 2的储能一释放一储能一释 放的循环过程。
本实施例利用充放电模块 2 实现了处于低功率模式时储能、 处 于高功率模式时释放的循环机制。以此来弥补高功率模式下的能源需 求， 并且不会增加电源 1的功率。 而在低功率模式下， 也不会使电源 1的功率下降太多， 从而实现了电源 1一直工作在平稳的状态下。
图 7为图 3中电源的功耗曲线图， 如图 7所示， 与图 2中现有 技术电源的功耗曲线图相比， 本实施例中电源 1 的功耗随着负载 4 的功耗的变化而小幅波动。
本实施例中， 电源 1仅具备源 （Source )工作模式， 而不具备 下沉（s ink )模式， 因此当充放电模块 2输出的电压高于电源 1的设 置电压时， 电源 1不会吸取电流，从而不会造成电流向电源 1方向流 动的大电流现象。
本实施例中， 充放电模块 2为充放电电池。
本实施例提供的供电电路的技术方案中， 在检测模块检测出模 式信号为低功率信号时电源对充放电模块进行充电，在检测模块检测 出模式信号为高功率信号时充放电模块向检测模块放电 ,且检测模块 向负载输出预先设置的工作电压。此方案可有效避免电源的功耗随着 负载功耗的变化而大幅波动，使得电源可稳定工作，从而提高了电源 的寿命， 并提高了产品的 EMI特性。
图 8为本发明第二实施例的一种显示装置的结构示意图，如图 8 所示， 该显示装置包括： 供电电路 5和与供电电路 5连接的负载 4。 供电电路 5采用上述第一实施例的供电电路， 此处不再赘述。
在本实施例的显示装置的技术方案中， 在检测模块检测出模式 信号为低功率信号时电源对充放电模块进行充电，在检测模块检测出 模式信号为高功率信号时充放电模块向检测模块放电 ,且检测模块向 负载输出预先设置的工作电压。此方案可有效避免电源的功耗随着负 载功耗的变化而大幅波动，使得电源可稳定工作，从而提高了电源的 寿命， 并提高了产品的 EMI特性。
可以理解的是， 以上实施方式仅仅是为了说明本发明的原理而 采用的示例性实施方式， 然而本发明并不局限于此。对于本领域内的 普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做 出各种变型和改进， 这些变型和改进也视为本发明的保护范围。

Claims

权 利 要 求 书
1、 一种供电电路， 包括： 电源、 充放电模块、 检测模块， 所述 电源与所述检测模块连接，所述充放电模块分别与所述电源和所述检 测模块连接； 其中：
所述检测模块用于检测供电路径上的检测参数， 根据所检测的 检测参数向所述电源反馈相应的模式信号，并向负载输出预先设置的 工作电压， 所述模式信号包括低功率信号和高功率信号；
所述电源用于接收所述检测模块反馈的模式信号， 根据所述模 式信号输出与所述模式信号对应的供电电压，并当所述模式信号为低 功率信号时对所述充放电模块进行充电；
所述充放电模块用于当所述电源输出与高功率信号对应的供电 电压时向所述检测模块放电，当所述电源输出与低功率信号对应的供 电电压时进行充电。
2、 根据权利要求 1所述的供电电路， 其中， 所述检测模块用于 检测供电路径上的检测参数，并判断所述检测参数是否大于预先设定 的阈值参数，若所述检测参数大于所述阈值参数，所述检测模块将所 述高功率信号反馈给所述电源，若所述检测参数小于或者等于所述阈 值参数，所述检测模块将所述低功率信号反馈给所述电源； 以及所述 检测模块向所述负载输出所述工作电压。
3、根据权利要求 2所述的供电电路，其中，所述检测模块包括： 判断模块和工作电压输出模块，所述判断模块与所述电源连接，所述 工作电压输出模块与所述负载连接；
所述判断模块用于检测供电路径上的检测参数， 判断所述检测 参数是否大于预先设定的阈值参数，若所述检测参数大于所述阈值参 数，则向所述电源反馈所述高功率信号，若所述检测参数小于或者等 于所述阈值参数， 则向所述电源反馈所述低功率信号；
所述工作电压输出模块用于向所述负载输出所述工作电压。
4、根据权利要求 3所述的供电电路，其中，所述判断模块包括： 功率电阻和压差检测模块， 所述功率电阻的输入端与所述电源连接， 所述功率电阻的输出端与所述工作电压输出模块连接，所述压差检测 模块的输入端分别与所述功率电阻的输入端和所述功率电阻的输出 端连接， 所述压差检测模块的输出端与所述电源连接。
5、 根据权利要求 4所述的供电电路， 其中， 所述检测参数为电 流值且所述阈值参数为阈值电流时，所述压差检测模块用于检测所述 功率电阻的输入端和输出端之间的压差值，根据所述压差值和所述功 率电阻的阻值生成所述电流值，并判断所述电流值是否大于所述阈值 电流，若所述电流值大于所述阈值电流，则向所述电源反馈所述高功 率信号，若所述电流值小于或者等于所述阈值电流，则向所述电源反 馈所述低功率信号。
6、 根据权利要求 4所述的供电电路， 其中， 所述检测参数为压 差值且所述阈值参数为阈值电压时，所述压差检测模块用于检测所述 功率电阻的输入端和输出端之间的压差值，并判断所述压差值是否大 于所述阈值电压，若所述压差值大于所述阈值电压，则向所述电源反 馈所述高功率信号，若所述压差值小于或者等于所述阈值电压，则向 所述电源反馈所述低功率信号。
7、 根据权利要求 1所述的供电电路， 其中，
所述模式信号为所述低功率信号时， 与所述模式信号对应的供 电电压为高电平；
所述模式信号为所述高功率信号时， 与所述模式信号对应的供 电电压为氏电平。
8、 根据权利要求 7所述的供电电路， 其中， 所述高电平与所述 低电平的差值为 0. IV。
9、 根据权利要求 7所述的供电电路， 其中， 当供电电压大于所 述充放电模块的充电阈值电压时，所述电源对所述充放电模块进行充 电， 当所述供电电压小于所述充放电模块的充电阈值电压时，所述电 源对所述充放电模块进行放电；所述充放电模块的充电阈值电压大于 所述低电平且小于所述高电平。
10、 根据权利要求 1 所述的供电电路， 其中， 所述充放电模块 为充放电电池。
11、 根据权利要求 1至 10任一所述的供电电路， 其中， 所述负 载包括 AM0LED面板。
12、 一种显示装置， 包括： 供电电路和与所述供电电路连接的 负载； 其中：
所述供电电路采用上述权利要求 1至 1 1任一所述的供电电路。
PCT/CN2013/076804 2013-04-22 2013-06-05 供电电路和显示装置 WO2014172961A1 (zh)

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