CN107808640A - Display system and current driving method thereof - Google Patents

Display system and current driving method thereof Download PDF

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Publication number
CN107808640A
CN107808640A CN201711016415.8A CN201711016415A CN107808640A CN 107808640 A CN107808640 A CN 107808640A CN 201711016415 A CN201711016415 A CN 201711016415A CN 107808640 A CN107808640 A CN 107808640A
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China
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current
light source
driving
digital
electrical parameter
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CN201711016415.8A
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Chinese (zh)
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单剑锋
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惠科股份有限公司
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Publication of CN107808640A publication Critical patent/CN107808640A/en

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source

Abstract

The invention provides a display system and a current driving method thereof. The display system comprises a display device and a current controller, wherein the current controller comprises an ambient light sensor, a storage device which is connected to the ambient light sensor, a digital-to-analog converter which is connected to the storage device and is used for converting digital reference values of ambient brightness at the front side of the display device into first electrical parameters, a comparator which is connected to the digital-to-analog converter and is used for comparing the first electrical parameters with second electrical parameters which correspond to work driving current of at least one luminescent source and for generating driving bias current, and a current regulatorwhich is connected to the comparator and is used for regulating the work driving current of the at least one luminescent source in accordance with the driving bias current, wherein the driving bias current is a difference between the first electrical parameters and the second electrical parameters. By regulating the work driving current of the at least one luminescent source in accordance with thedriving bias current, corresponding digital reference values are selected in accordance with different using conditions as evidences for regulating the work driving current.

Description

显示系统及其电流驱动方法 And a current driving method of the display system

技术领域 FIELD

[0001]本申请实施例涉及液晶显示技术领域,尤其涉及一种显示系统及其电流驱动方法。 [0001] Example embodiments of the present application relates to the field liquid crystal display, particularly to a system and a current driving method of the display.

背景技术 Background technique

[0002]通常,液晶显亦器(LCD)组件应用在各种用途,例如笔记本电脑,移动电话,个人数字助理,汽车仪表板等。 [0002] Generally, a liquid crystal display device also (LCD) assembly used in various applications, such as laptop computers, mobile phones, personal digital assistants, automobile dashboard. 典型的,发光光源位于LCD组件中光调制器,例如液晶层后面以利于观看影像及产生最佳发光效果。 Typically, the light source assembly of the LCD light modulator, for example in order to facilitate viewing image and produce the best results behind the liquid crystal light-emitting layer. 发光光源可以是荧光灯,电致发光组件,发光二极管(LED) 气态放电灯等。 Light source may be a fluorescent lamp, an electroluminescent component, a light emitting diode (LED) gas discharge lamps. 一般控制电路提供整流过的电流给发光光源。 General control circuit provides rectified current to the light source. ' '

发明内容 SUMMARY

[0003]本申请实施例所要解决的技术问题在于提供一种显示系统,根据不同使用条件来控制液晶显示系统内发光光源。 [0003] Technical Problem Example embodiments of the present application to be solved is to provide a display system to control the liquid crystal display according to the different conditions of the light source system.

[0004]本申请实施例进一步所要解决的技术问题在于提供一种显示系统的电流驱动方法,用于显示系统控制发光光源。 [0004] Example embodiments of the present application further technical problem to be solved is to provide a method for displaying a current driving system, the display system for controlling the light emission source.

[0005]为解决上述技术问题,本申请实施例首先提供如下技术方案:一种显示系统,包括: 显示装置,具有至少一发光光源;以及电流控制器,连接所述至少一发光光源,所述电流控制器包括: 计时器,计算所述至少一发光光源的总点亮时间; 存储装置,连接所述计时器,被配置为存储分别对应不同总点亮时间的多个数字参考值,其中每个数字参考值对应所述至少一发光光源的预定驱动电流; 数模转换器,连接于所述存储装置及用以转换所述至少一发光光源的总点亮时间的数字参考值成一第一电参数; 比较器,连接于所述数模转换器并用以比较所述第一电参数与对应所述至少一发光光源的工作驱动电流的第二电参数,并产生驱动偏置电流;及电流调节器,连接所述比较器及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流,其中所述驱 [0005] To solve the above problems, embodiments of the present application first provides the following technical solutions: A display system, comprising: a display device having at least one LED light source; and a current controller connected to said at least one light source, the current controller comprising: a timer, said at least one light source calculating total lighting time; storage means connected to the timer, is configured to store a plurality of digital reference values ​​respectively corresponding to different total lighting time, wherein each of digital reference value corresponds to the at least one light source emitting a predetermined driving current; digital to analog converter connected to said storage means for converting said digital reference and the at least one light source of a total lighting time of a first electrical value to a parameters; a comparator connected to said digital to analog converter and for comparing the first electrical parameter corresponding to the at least one light source operating said second electrically driving current parameter, and generating a driving bias current; and a current regulator device, and said comparator is connected to the driving source of the at least one light-emitting operation of the driving adjusting the bias current, wherein the drive 动偏置电流对应所述第一电参数及所述第二电参数之间的差值。 Dynamic bias current corresponding to a difference between the first electrical parameter and the second electrical parameter.

[0006] 进一步地,所述比较器为电压比较器;所述第一电参数为对应所述至少一发光光源的预定驱动电流的电压;及所述第二电参数为对应所述至少一发光光源的工作驱动电流的反馈电压。 [0006] Further, the comparator is a voltage comparator; corresponding to the first electrical parameter is the voltage of at least a predetermined light source driving current; and the second electrical parameter corresponds to the at least one light emitting work light source driving current feedback voltage.

[0007] 进一步地,所述比较器为电流比较器;所述第一电参数为所述对应至少一发光光源的预定驱动电流的电流值;及所述第二电参数为对应所述至少一发光光源的工作驱动电流的反馈电流。 [0007] Further, the comparator is a current comparator; the first electrical parameter is the current value corresponding to at least a predetermined light source driving current; and the second electrical parameter corresponds to the at least one operating light source driving current feedback current.

[0008] 进一步地,所述电流控制器还包括检测器,所述检测器连接所述至少一发光光源并用以测量所述第二电参数。 [0008] Further, the current controller further includes a detector, the detector connected to the at least one light source and to measure a second electrical parameter.

[0009] 进一步地,所述至少一发光光源的预定驱动电流与环境亮度成正比。 [0009] Further, the light source emitting a predetermined drive current is proportional to at least ambient brightness.

[0010] 又一方面,本申请实施例提供了一种显示系统,包括:显示装置,具有至少一发光光源;以及电流控制器,连接所述至少一发光光源,所述电流控制器包括: 环境光感测器,感测所述显示装置前方的环境亮度; 存储装置,连接所述环境光感测器,被配置为存储分别对应不同环境亮度的多个数字参考值,其中每个数字参考值对应所述至少一发光光源的预定驱动电流; 数模转换器,连接于所述存储装置及用以转换所述显示装置前方的环境亮度的数字参考值成第一电参数; 比较器,连接于所述数模转换器并用以比较所述第一电参数与对应所述至少一发光光源的工作驱动电流的第二电参数,并产生驱动偏置电流;及电流调节器,连接所述比较器及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流,其中所述驱动偏置电流对应所述第一电参 [0010] In yet another aspect, the present application provides a display system, comprising: a display device having at least one LED light source; and a current controller connected to said at least one light source, the current controller comprises: Environment an optical sensor, senses the ambient brightness in front of the display means; memory means, connected to the ambient light sensor, configured to store a plurality of digital reference values ​​respectively corresponding to different ambient brightness, wherein each of the digital reference value corresponding to the at least one predetermined light source driving current; digital to analog converter connected to said storage means and for converting said digital reference display brightness of the environment in front of the apparatus to a first value of an electrical parameter; a comparator, connected to the digital to analog converter and for comparing the first electrical parameter corresponding to the at least one light source of the second electrical operation of the drive current parameter, and generating a driving bias current; and a current regulator, connected to said comparator and adjusting the bias current according to the driving of the light source a drive current of at least the work, wherein the bias current of the driving power corresponding to the first reference 数及所述第二电参数之间的差值。 And a difference between the number of second electrical parameter.

[0011] 进一步地,所述至少一发光光源的预定驱动电流与环境亮度成正比。 [0011] Further, the light source emitting a predetermined drive current is proportional to at least ambient brightness.

[0012] 进一步地,所述第一电参数为对应所述至少一发光光源的预定驱动电流的电压; 及所述第二电参数为对应所述至少一发光光源的工作驱动电流的反馈电压。 [0012] Further, the first electrical parameter is a voltage corresponding to the at least one predetermined light source driving current; and the second electrical parameter corresponds to the at least one light emitting source voltage feedback operation of the drive current.

[0013] 进一步地,所述第一电参数为所述对应至少一发光光源的预定驱动电流的电流值;及所述第二电参数为一对应所述至少一发光光源的工作驱动电流的反馈电流。 [0013] Further, the first electrical parameter is the current value corresponding to at least a predetermined light source driving current; and the second electrical parameter is a feedback corresponding to the at least one light source driving current operating current.

[0014] 另一方面,本申请实施例还提供了一种显示系统的电流驱动方法,包括: 感测对应显示装置前方的环境亮度的环境光感测器,并转换所述环境亮度为数字参考值,其中所述数字参考值对应至少一发光光源的预定驱动电流; 转换所述数字参考值成第一电参数; 测量对应所述至少一发光光源的工作驱动电流的第二电参数; 比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流; 所述至少一发光光源的预定驱动电流与环境亮度成正比; 所述驱动偏置电流对应所述第一电参数及第二电参数的差值。 [0014] On the other hand, embodiments of the present application further provides a method of driving a current display system, comprising: the display luminance corresponding to a sensing device in front of the ambient environment of the light sensor, and converts the digital reference ambient brightness value, wherein the digital reference value corresponding to at least a predetermined light source driving current; converting the digital reference value to a first electrical parameter; a second measurement of electrical parameters corresponding to said at least one light source operating drive current; comparing the said first electrical parameter and the second electrical parameter based on the comparison result and the driving bias current; and a light source operating according to the drive current of at least adjusting the bias current driving; the at least one light emitting source predetermined driving current proportional to the luminance and the environment; corresponding to the difference between the bias current driving the first and second electrical parameter is an electrical parameter.

[0015] 另一方面,本申请实施例还提供了一种显示系统的电流驱动方法,包括: 计算对应所述至少一发光光源的总点亮时间的计时器,并转换所述至少一发光光源的总点亮时间为数字参考值,其中所述数字参考值对应至少一发光光源的预定驱动电流; 转换所述数字参考值成第一电参数; 测量对应所述至少一发光光源的工作驱动电流的第二电参数; 比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流。 [0015] On the other hand, embodiments of the present application further provides a method of current driving system, comprising a display: calculating the at least one light source corresponding to a total lighting time timer, and converting said at least one light source the total lighting time of a digital reference value, wherein the digital reference value corresponding to at least a predetermined light source driving current; converting the digital reference value to a first electrical parameter; corresponding to the at least one measuring light source drive current operating a second electrical parameters; comparing the first electrical parameter and the second electric parameter, and generating a driving bias current based on the comparison; and said at least one light source operating according to the drive current of the bias current adjusting drive .

[0016] 又一方面,本申请实施例提供了一种显示系统的电流驱动方法,包括: 计算对应显示装置前方的环境亮度的环境光感测器,并转换所述环境亮度为数字参考值,其中所述数字参考值对应至少一发光光源的预定驱动电流;转换所述数字参考值成第一电参数; 测量对应所述至少一发光光源的工作驱动电流的第二电参数; 比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流。 [0016] In yet another aspect, the present application provides a method for driving a current display system, comprising: computing optical sensor corresponding to a display environment of the ambient brightness in front of the apparatus, and converts the digital reference value for the ambient brightness, wherein the digital reference value corresponding to at least a predetermined light source driving current; converting the digital reference value to a first electrical parameter; measuring a corresponding at least one parameter of the second electrical operation of the drive current of the light emitting source; comparing said first a second electrical parameter of the electrical parameter, and generating a driving bias current based on the comparison; and a light source operating according to the drive current of at least said drive bias current adjustment.

[0017] 又一方面,本申请实施例提供了一种显示系统,包括: 显示装置,具有至少一发光光源;以及电流控制器,连接所述至少一发光光源,所述电流控制器包括: 工作温度感测器,感测所述至少一发光光源的工作温度; 存储装置,连接所述工作温度感测器,被配置为存储分别对应不同工作温度的多个数字参考值,其中每个数字参考值对应所述至少一发光光源的预定驱动电流; 数模转换器,连接于所述存储装置及用以转换所述至少一发光光源的工作温度的数字参考值成第一电参数; 比较器,连接于所述数模转换器并用以比较所述第一电参数与对应所述至少一发光光源的工作驱动电流的第二电参数,并产生驱动偏置电流;及电流调节器,连接所述比较器及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流,其中所述驱动偏置电流对应所 [0017] In yet another aspect, the present application provides a display system, comprising: a display device having at least one LED light source; and a current controller connected to said at least one light source, the current controller comprises: Work temperature sensor sensing the at least one light source operating temperature; storage means, connected to the working temperature sensor configured to store a plurality of digital reference values ​​respectively corresponding to different operating temperatures, wherein each of the digital reference the value corresponds to at least a predetermined light source driving current; digital to analog converter connected to said storage means and to convert said at least one light source operating temperature of a first electrical value to a digital reference parameter; comparator, and digital to analog converter connected to said electrical parameter for comparing said first and second electrical parameter corresponding to the at least one light source operating drive current, and generating a driving bias current; and a current regulator, connected to the the comparator and the at least one light source of the driving operation of the drive current of the bias current adjustment, wherein the driving current corresponding to the bias 述第一电参数及所述第二电参数之间的差值。 A difference between said parameter and the second parameter of the first electrical power.

[0018] 又一方面,本申请实施例提供了一种显示系统的电流驱动方法,包括: 计算对应所述至少一发光光源的工作温度的工作温度感测器,并转换所述工作温度为数字参考值,其中所述数字参考值对应至少一发光光源的预定驱动电流; 转换所述数字参考值成第一电参数; 测量对应所述至少一发光光源的工作驱动电流的第二电参数; 比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流。 [0018] In yet another aspect, the present application provides a method for displaying a current driving system, comprising: calculating a corresponding at least one light source operating temperature of the sensor operating temperature, the operating temperature and converts to a digital a reference value, wherein the digital reference value corresponding to at least a predetermined light source driving current; converting the digital reference value to a first electrical parameter; measuring a second electrical parameter corresponds to the light source operating at least a driving current; Comparative the first electrical parameter and the second electric parameter, and generating a driving bias current based on the comparison; and a light source operating according to the drive current of at least said drive bias current adjustment.

[0019] 又一方面,本申请实施例提供了一种显示系统,包括: 显示装置,具有至少一发光光源;以及电流控制器,连接所述至少一发光光源,所述电流控制器包括: 环境光感测器,感测所述显示装置前方的环境亮度; 工作温度感测器,感测所述至少一发光光源的工作温度; 存储装置,连接所述环境光感测器及所述工作温度感测器,被配置为存储分别对应不同环境亮度及不同工作温度的多个数字参考值,其中每个数字参考值对应所述至少一发光光源的预定驱动电流; 数模转换器,连接于所述存储装置及用以转换所述显示装置前方的环境亮度及所述至少一发光光源的工作温度的数字参考值成第一电参数; 比较器,连接于所述数模转换器并用以比较所述第一电参数与对应所述至少一发光光源的工作驱动电流的第二电参数,并产生驱动偏置电流;及电流 [0019] In yet another aspect, the present application provides a display system, comprising: a display device having at least one LED light source; and a current controller connected to said at least one light source, the current controller comprises: Environment an optical sensor, senses the ambient brightness in front of the display apparatus; operating temperature sensor senses said at least one light source operating temperature; storage means, connected to the ambient light sensor and the operating temperature sensor, configured to store a corresponding plurality of different ambient brightness digital reference values ​​and different operating temperatures, wherein each of the digital reference value corresponds to at least a predetermined light source driving current; a digital to analog converter connected to the said storage means and for converting the display brightness and ambient operating temperature of the device in front of the at least one light source into a first digital reference value of an electrical parameter; a comparator connected to said digital to analog converter and for comparing the said first electrical parameter corresponding to the at least one second electrical parameter operating light source drive current, and generating a driving bias current; and a current 节器,连接所述比较器及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流,其中所述驱动偏置电流对应所述第一电参数及所述第二电参数之间的差值。 Section, a comparator connected to said light source and at least one operating drive current to the driving adjusting the bias current, wherein the bias current corresponding to the first driving parameter and the second electric parameter of the electric the difference between.

[0020] 又一方面,本申请实施例提供了一种显示系统,包括: 显示装置,具有至少一发光光源;以及电流控制器,连接所述至少一发光光源,所述电流控制器包括: 第一存储装置,被配置为存储分别对应不同使用条件的多个第一数字参考值,其中每个第一数字参考值对应所述至少一发光光源的预定驱动电流; 第一数模转换器,连接于所述第一存储装置及用以转换使用条件下的第一数字参考值成第一电参数; 光感测器,感测所述至少一发光光源的亮度; 第二存储装置,连接所述光感测器,被配置为存储第二数字参考值,其中所述第二数字参考值对应所述至少一发光光源的工作驱动电流; 第二数模转换器,连接于所述第二存储装置及用以转换所述第二数字参考值成第二电参数; 比较器,连接于所述第一数模转换器及所述第二数模转换器并用以比较 [0020] In yet another aspect, the present application provides a display system, comprising: a display device having at least one LED light source; and a current controller connected to said at least one light source, the current controller comprises: a first a storage means configured to store a first plurality of corresponding digital reference values ​​for different conditions of use, wherein each of the first digital reference value corresponding to said at least one predetermined light source driving current; a first digital to analog converter, connected to and said first storage means for converting a first digital reference value under the conditions of use of a first electrical parameter; a light sensor, the at least one light source of said brightness sensing; a second storage means, connected to said an optical sensor, configured to store a second digital reference value, wherein the second digital reference value corresponding to the at least one light source operating driving current; a second digital to analog converter connected to the second storage means and for converting the second digital reference value to a second electrical parameter; a comparator, and a digital to analog converter connected to said first and said second digital to analog converter to compare 述第一电参数与所述第二电参数,并产生驱动偏置电流;及电流调节器,连接所述比较器及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流,其中所述驱动偏置电流对应所述第一电参数及所述第二电参数之间的差值。 Said first electrical parameter and the second electric parameter, and generating a driving bias current; and a current regulator, connected to said comparator and at least one light source operating according to the driving current of said drive bias current adjustment, wherein said drive bias current corresponding to a difference between the first electrical parameter and the second electrical parameter. [0021] 又一方面,本申请实施例提供了一种显示系统的电流驱动方法,包括: 转换第一数字参考值成第一电参数,其中所述第一数字参考值对应至少一发光光源的预定驱动电流; 感测对应所述至少一发光光源的亮度的光感测器,并转换所述至少一发光光源的亮度为第二数字参考值,其中所述第二数字参考值对应至少一发光光源的工作驱动电流; 转换所述第二数字参考值成第二电参数;比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流。 [0021] In yet another aspect, the present application provides a system embodiment of the current driving method, a display comprising: converting a first digital value to a first electrical reference parameter, wherein the first digital reference value corresponding to the at least one light emitting source predetermined driving current; sense corresponding to the at least one light-emitting luminances of the light sensor and converting the luminance of the at least one light source is a second digital reference value, wherein the second digital reference value corresponding to at least a light emitting operation of the drive current of the light source; converting the second digital reference value to a second electrical parameter; comparing the first electrical parameter and the second electric parameter, and generating a driving bias current based on the comparison; and a drive according to the adjusting the bias current source operating at least one light-emitting driving current.

[0022] 通过采用上述技术方案,本申请实施例至少具有以下有益效果:本申请通过存储装置预存储多个数字参考值,让每个数字参考值分别对应不同的使用条件,根据不同的使用条件选择对应的数字参考值作为调整工作驱动电流的依据。 [0022] By adopting the above technical solution, embodiments of the present application has at least the following advantages: a plurality of pre-stored herein by reference digital value storage means so that each digital reference values ​​correspond to different conditions of use, depending on the conditions of use selecting a corresponding digital reference value as the basis for adjustment of the driving current. 另,本申请的第二电参数,除了可通过直接量测工作驱动电流外,还可通过设置光感测器,直接感测光亮度来取得对应的工作驱动电流,以避免在相同电流下因总点亮时间或不同工作温度造成的亮度落差。 Also, a second electrical parameter of the present disclosure, in addition to direct measurement of work by the driving current, but also to obtain the working of the drive current provided by the light sensor, the brightness direct sensing light in order to avoid at the same current by the total lighting time of the luminance drop or due to different operating temperatures.

附图说明 BRIEF DESCRIPTION

[0023]为了更清楚地说明本申请实施例技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0023] In order to more clearly illustrate the technical solutions of the present application embodiment, as briefly described in the introduction to the accompanying drawings required for use in describing the embodiments. Apparently, the drawings in the following description are some embodiments of the present application, for ordinary skill in the art, without creative efforts, you can obtain other drawings based on these drawings. [0024]图1为本申请一实施例用于发光光源的电流调节器的示意图。 [0024] FIG. 1 is a schematic embodiment of a light source for emitting a current regulator to apply a present embodiment.

[0025]图2为本申请一实施例中一种利用电压比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0025] FIG. 2 is a schematic diagram of one embodiment using the voltage comparator provides adjustment light source driving current to an embodiment of the application controllers.

[0026]图3为本申请一实施例中一种利用电流比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0026] FIG. 3 is a schematic diagram of one embodiment provided by the current comparator adjustment light source driving current to an embodiment of the application controllers.

[0027]图4为本申请一实施例中调整流经发光光源的工作驱动电流的步骤流程图。 [0027] The procedure of Example 4 to adjust the flow through the light source driving current operating flowchart of one embodiment of the present application.

[0028]图5为本申请另一实施例中一种利用电压比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0028] Figure 5 embodiment for providing a light source driving current adjustment controller uses the voltage comparator is a schematic view of another embodiment of the present application.

[0029]图6为本申请另一实施例中一种利用电流比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0029] FIG. 6 is a schematic of one embodiment provided by the current comparator light source driving current adjustment controller according to another embodiment of the present application.

[0030] 图7为本申请另一实施例中调整流经发光光源的工作驱动电流的步骤流程图。 [0030] The procedure of Example 7 to adjust the flow through the light source driving current operating flowchart of another embodiment of the present application.

[0031] 图8为本申请另一实施例中一种利用电压比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0031] FIG. 8 is a schematic diagram of one embodiment using a voltage comparator to provide a light source emitting a driving current adjustment controller according to another embodiment of the application.

[0032] 图9为本申请另一实施例中一种利用电流比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0032] FIG. 9 is a schematic of one embodiment provided by the current comparator light source driving current adjustment controller according to another embodiment of the present application.

[0033]图1〇为本申请另一实施例中调整流经发光光源的工作驱动电流的步骤流程图。 [0033] FIG 1〇 present embodiment adjust flows step luminescent light source driving current operating flowchart of another embodiment of the application. [0034]图11为本申请另一实施例中一种利用电压比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0034] FIG. 11 in the present embodiment the light emitting source for providing a driving current adjustment controller uses the voltage comparator schematic view of another embodiment of the application.

[0035]图12为本申请另一实施例中一种利用电流比较器提供发光光源调整工作驱动电流的控制器的示意图。 [0035] FIG. 12 of the present embodiment for providing a light source driving current adjustment controller using a current comparator schematic view of another embodiment of the application.

[0036]图I3为本申请另一实施例中调整流经发光光源的工作驱动电流的步骤流程图。 [0036] FIG I3 flowing through the present steps in adjusting the light emission driving current work flowchart of another embodiment of the application.

具体实施方式 Detailed ways

[0037]下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。 [0037] The application of the present embodiment in conjunction with the following drawings embodiments, the technical solutions in the embodiments of the present application will be clearly and completely described. 显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。 Obviously, the described embodiments are part of an embodiment of the present application, rather than all embodiments. 基于本申请中的实施例,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,都属于本申请保护的范围。 Based on the embodiments of the present application, all other embodiments to those of ordinary skill in the art without any creative effort shall fall within the scope of the present application.

[0038]如图1所示,本申请其中一个实施例中,发光光源模块104可以位于LCD组件中的光调制器后面。 [0038] As shown in FIG 1, one embodiment of the present application embodiment, the light source module 104 may be located behind the light modulator in the LCD assembly. 发光光源模块104包括串联的发光二极管(LED) am)电流控制综合电路(亦称为控制器)102控制发光光源模块104的驱动电流。 Light source module 104 includes a light emitting diode (LED) am) in series with a current control integrated circuit (also called a controller) 102 controls the driving current of the light source module 104. 控制器102的输出端DRV经由RC滤波器1〇6连接至晶体管108的基极。 DRV output of the controller 102 is connected to the base electrode of transistor 108 via the RC filter 1〇6. 晶体管108的集电极经连接器负荷电阻110连接至电源装置Vcc。 Collector of the transistor is connected via a load resistor 110 is connected to power supply device 108 is Vcc. 晶体管10S的射极接地。 The emitter grounded transistor 10S. 晶体管10S的集电极进一步经二极管H2连接至发光光源模块104。 Collector of the transistor 10S is further connected to the light emitting diode light source module 104 is H2. 发光光源模块104的输出端经偏置电阻114接地。 The output of the light source module 104 via bias resistor 114 to ground. 发光光源模块104的输出端还连接至控制器1〇2的端FB。 The output of light source module 104 is also connected to the terminal FB of controller 1〇2. 电容器116使电源装置Vcc接地。 Power supply means Vcc capacitor 116 is grounded. 另一电容器11S使二极管112接地。 Another diode 112 is grounded capacitor 11S.

[0039]在另一常规电流调节器100中,偏置电阻器114决定可以流经发光光源模块1〇4的驱动电流值。 [0039] In another conventional current regulator 100, a biasing resistor 114 may decide a current value flowing through the driving of the light source module 1〇4. 控制器1〇2经由RC滤波器1〇6输出固定的启动信号至晶体管108的基极。 1〇2 1〇6 controller via the RC filter output enable signal to the fixed base of the transistor 108 of the electrode. 晶体管108提供给发光光源模块104—预定驱动电流。 Transistor 108 to the light emitting source module 104- predetermined drive current. 典型而言,一旦偏置电阻器114的电阻值建立,则经过发光光源模块104的驱动电流即无法调整。 Typically, once the resistance value of the bias resistor 114 is established, the drive current through the light source module 104, i.e. can not be adjusted. 发光光源模块1〇4的LED亮度与流经发光光源模块104的驱动电流成正比。 Light source driving module 1〇4 proportional to the current flowing through the light emitting luminance of an LED light source module 104. 长期使用电路组件可能造成发光光源模块1〇4的驱动电流不可预期的变化。 Long-term use may cause the circuit component module light source driving current 1〇4 of unpredictable changes. 此外,某些种类LED,例如有机LED (0LED)内的驱动电流可能因为电流调Ti器100的操作温度改变而发生变化。 In addition, certain types of the LED, for example, a driving current in the organic LED (0LED) probably because Ti current regulator 100 changes the operating temperature varies. 结果,可能不利于发光光源模块1〇4内led的亮度。 As a result, the light source emission brightness may not be conducive 1〇4 led within the module. 因此,需要一种控制LCD系统内发光光源模块的驱动电流的方法及装置。 Thus, the method and apparatus of driving current in the light source module is a need for an LCD control system.

[0040]如图2所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连1^0 242 (1)-〇1),1^0 242 (1)-(11)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于1XD系统的背光光源,例如用于小型LCD系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( 0LED ) 等。 As shown in the present application [0040] Example 2 Another embodiment provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series 1 ^ 0242 (1) -〇1), 0242 ^ 1 (1) - (11) can be connected in series, parallel connection, or series and parallel combinations are connected, the light emitting the light source 214 may include a backlight source 1XD system, for example for small LCD light LED backlight system, the LED backlight LED light source may include a variety of such white LED, a color LED and organic LED (0LED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:计时器221、存储装置220、数模转换器222、比较器235及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 includes: a timer 221, memory 220, digital to analog converter 222, comparator 235 and a current regulator 212. 计时器221计算至少一发光光源214的总点亮时间,例如可通过驱动信号DRV来启动计时器221进行总点亮时间的计算。 The timer 221 calculates a total lighting time of the at least one light source 214, for example, to start calculation of the total lighting time timer 221 by the driving signal DRV. 存储装置220,连接计时器221,被配置为存储分别对应不同总点亮时间的多个数字参考值226, 其中每个数字参考值226对应至少一发光光源214的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 Storage device 220, connected to the timer 221, configured to store a plurality of digital reference values ​​respectively corresponding to different total lighting time of 226, 226 wherein each of the digital reference value corresponding to a predetermined drive current at least a light source 214, a digital reference value may operating conditions required by the simulation light source 214 is obtained. 例如,如果发光光源214的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成数字参考值并且储存于存储装置220中,由于可发光组件会依总点亮时间而有光衰的现象,也就是总点亮时间100小时与总点亮时间5000小时的发光光源在相同工作驱动电流下发出亮度是不同的,通常总点亮时间5000小时的亮度会小于总点亮时间100小时的亮度。 For example, a preferred drive current value 214 if desired brightness luminance proportional to the current flowing through the light source driver 214 of the light source 214, the corresponding light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter and converted into a digital reference value stored in the memory device 220, since the light emitting element can be a light by total lighting time decay phenomenon, i.e. total lighting time of 100 hours the total lighting time of the light source with 5000 hours of work at the same luminance of emitted drive currents are different, usually a total lighting time of 5000 hours will be less than the total brightness of the lighting luminance of 100 hours. 因此,可将发光光源214的预定驱动电流设定成与发光光源214的总点亮时间成正比,也就是说,发光光源214 的总点亮时间越久,则预定驱动电流越大,以增加工作驱动电流以补偿光衰现象。 Therefore, the predetermined light source may be set to the driving current 214 is proportional to the total lighting time of the light source 214, i.e., the longer the light source 214 total lighting time, the predetermined drive current increases to increase the operating the driving current to compensate for the phenomenon of bad light. 数模转换器222,连接于存储装置220及用以转换至少一发光光源214的总点亮时间的数字参考值226 成第一电参数,例如:数模转换器222先将数字参考值226转换成模拟信号并且转呈模拟信号给电压参考单元230,电压参考单元230用以产生对应于模拟信号的参考电压信号(第一电参数),为了说明起见,电压参考单元230显示为独立的单元,然而,电压参考单元230可以合并成数模转换器222,例如,数模转换器222可以用以将数字参考值226转换成第一电参数。 DAC 222, 226 coupled to a first electrical parameter of at least 220 and a light source for converting the digital reference value of the total lighting time of the memory device 214, for example: first digital to analog converter 222 converts the digital reference value 226 forwarded to an analog signal and an analog signal 230, the reference voltage unit 230 unit for generating an analog signal corresponding to the reference voltage signal (the first electrical parameter), for purposes of explanation, the reference voltage unit 230 is shown as a separate unit to the reference voltage, However, the reference voltage unit 230 may be incorporated into a digital to analog converter 222, e.g., 226 digital to analog converter 222 may be used to convert the digital value to a first electrical reference parameter. 比较器235为电压比较器235,通过电压参考单元230电性连接于数模转换器222,并用以比较第一电参数(如:参考电压值)与对应发光光源214的工作驱动电流的第二电参数(如: 反馈电压值),并产生对应二输入电压差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S)晶体管240,M0S晶体管240用以调整发光光源214的工作驱动电流,M0S晶体管240的栅极端与电压比较器235连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地,M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器260故障,及用以不想要的高频率电流引流经旁路电容器C接地。 Comparator 235 is a voltage comparator 235, a voltage reference unit 230 is electrically connected to a digital to analog converter 222, and for comparing the first electrical parameters: the drive current (e.g., reference voltage) corresponding to the second light source 214 electrical parameters (such as: a feedback voltage value), and generates a drive signal DRV corresponding to the two input voltage difference (eg: driving bias current), and current regulator 235 and the comparator 212 is connected to adjust the bias current according to at least one of the light emitting driving work drive current source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, transistor 240 M0S light source for adjusting the operation of the drive current 214, the voltage of the gate terminal of transistor 240 M0S comparator 235, and receives a drive signal DRV, and a source terminal grounded M0S transistor 240, the drain terminal of transistor 240 M0S further connected via diode D light source 214, but also a diode D for protecting the capacitor C is grounded through the bypass diode D 214 light source controller 260 to avoid failures, and to unwanted high frequency current bypass capacitor C is grounded through the drainage.

[0041] 在具体应用中,电流控制器还包括检测器216,检测器216连接发光光源214并用以测量第二电参数(如:反馈电压值)。 [0041] In a particular application, the current controller further comprises a detector 216, detector 216 connected to light source 214 and to measure a second electrical parameter (eg: a feedback voltage value). 检测器216与发光光源214连接,检测器216包括检测器电阻Rs,检测器电阻Rs用以测定对应流经发光光源214的工作驱动电流的电压FB,检测器电阻Rs与电压比较器235的输入端连接,电压比较器235接收电压FB并且将与来自电压参考单元230的第一电参数(如:参考电压值)进行比较,并产生M0S晶体管240的栅极端的驱动信号DRV,驱动信号DRV根据电压FB与参考电压值之间的差值驱动M0S晶体管240的栅极端,MOS晶体管240根据驱动信号DRV调整发光光源214的工作驱动电流,例如,发光光源214的总点亮时间为5000小时,则预定驱动电流为5A、第一电参数(参考电压值)为120V,但因点亮时间过久,发光光源214的工作驱动电流降低为M、第二电参数(电压FB)为100V,则电压FB与参考电压值之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增加, 同理,如果流经发光光源214 Detector 216 is connected to the light source 214, detector 216 includes a detector resistor Rs, the resistor Rs detector, for measuring the input voltage corresponding to the driving current flowing through the FB working light source 214 of the detector resistor Rs 235 and a voltage comparator terminal is connected, the voltage comparator 235 receives a voltage FB and the first electrical parameter from the reference voltage unit 230: comparing (e.g., reference voltage), and generates the gate terminal of the driving signal DRV M0S transistor 240, according to the drive signal DRV the difference between the voltage FB with a reference voltage value of the driving transistor M0S gate terminal 240, the MOS transistor 240 according to the driving signal DRV to adjust operation of the drive current of light source 214, e.g., light source 214 total lighting time of 5000 hours, a predetermined drive current. 5A, a first electrical parameter (reference voltage) of 120V, but the lighting time is too long, working light source driving current 214 is reduced to M, a second electrical parameters (voltage FB) is 100V, the voltage the difference between the value of the FB reference voltage that is generated drive signal DRV relatively strong, resulting in operation of the driving current of light source 214 is increased, the same token, if the light source 214 flows through 工作驱动电流过大,则电压比较器235产生相当弱的驱动信号DRV,造成发光光源214的工作驱动电流降低。 Work drive current is too large, the voltage comparator 235 generates a drive signal DRV is relatively weak, causing the work light source driving current 214 is reduced.

[0042]因此,可在电流控制器260中设置计时器221以计算总点亮时间,电流控制器260根据总点亮时间自动选择对应的数字参考值226,并据以增加工作驱动电流以补偿光衰现象。 [0042] Therefore, to calculate the total lighting time 221, the current controller 260 automatically selects the appropriate digital reference value 226 in accordance with the total lighting time timer provided in the current controller 260, and accordingly a driving current to compensate for increased working phenomenon of bad light. [0043] $图3所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连1^) 242 (1)-〇1),1^0 242 (1)-〇1)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于LCD系统的背光光源,例如用于小型lcd系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( 0LED ) 等。 As shown in the present application [0043] $ 3] Another embodiment provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series ^ 1) 242 (1) -〇1), 1 ^ 0242 (1) -〇1) may be connected in series, parallel connection, or series and parallel combinations are connected, the light emitting the light source 214 may include an LCD backlight light source system, for example for small systems lcd LED backlight light source, the light source may include various LED backlight LED, white LED, for example, a color LED and organic LED (0LED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:计时器221、存储装置220、数模转换器222、比较器235及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 includes: a timer 221, memory 220, digital to analog converter 222, comparator 235 and a current regulator 212. 计时器2W计算至少一发光光源214的总点亮时间,例如可通过驱动信号DRV来启动计时器221进行总点亮时间的计算。 Calculating at least 2W timer total lighting time of a light source 214, for example, start a timer 221 to calculate the total lighting time by driving signals DRV. 存储装置220,连接计时器221,被配置为存储分别对应不同总点亮时间的多个数字参考值226, 其中每个数字参考值22e对应至少一发光光源214的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 Storage device 220, connected to the timer 221, configured to store a plurality of digital reference values ​​respectively corresponding to different total lighting time of 226, wherein each of the digital reference value corresponding to the at least one light source 22e predetermined drive current 214, the reference value may be a digital operating conditions required by the simulation light source 214 is obtained. 例如,如果发光光源W4的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成数字参考值并且储存于存储装置220中,由于可发光组件会依总点亮时间而有光衰的现象,也就是总点亮时间100小时与总点亮时间5000小时的发光光源在相同工作驱动电流下发出亮度是不同的,通常总点亮时间5000小时的亮度会小于总点亮时间100小时的亮度。 For example, if the luminance proportional to the current flowing through the light source driving W4 light source 214, 214 preferably driving current value desired brightness light source can be obtained by the simulation, the corresponding light source 214 operating conditions desired brightness, and preferred drive current value may utilize analog to digital converter and converted into a digital reference value stored in the memory device 220, since the light emitting element can be a light by total lighting time decay phenomenon, i.e. total lighting time of 100 hours the total lighting time of the light source with 5000 hours of work at the same luminance of emitted drive currents are different, usually a total lighting time of 5000 hours will be less than the total brightness of the lighting luminance of 100 hours. 因此,可将发光光源214的预定驱动电流设定成与发光光源214的总点亮时间成正比,也就是说,发光光源214 的总点亮时间越久,则预定驱动电流越大,以增加工作驱动电流以补偿光衰现象。 Therefore, the predetermined light source may be set to the driving current 214 is proportional to the total lighting time of the light source 214, i.e., the longer the light source 214 total lighting time, the predetermined drive current increases to increase the operating the driving current to compensate for the phenomenon of bad light. 数模转换器222,连接于存储装置220及用以转换至少一发光光源214的总点亮时间的数字参考值226 成第一电参数,例如:数模转换器222先将数字参考值226转换成模拟信号并且转呈模拟信号给电流参考单元232,电流参考单元232用以产生对应于模拟信号的参考电流信号(第一电参数),为了说明起见,电流参考单元232显示为独立的单元,然而,电流参考单元232可以合并成数模转换器222,例如,数模转换器222可以用以将数字参考值226转换成第一电参数。 DAC 222, 226 coupled to a first electrical parameter of at least 220 and a light source for converting the digital reference value of the total lighting time of the memory device 214, for example: first digital to analog converter 222 converts the digital reference value 226 into an analog signal and the analog signal is forwarded to the current reference cell 232, current reference unit 232 for generating an analog signal corresponding to the reference current signal (the first electrical parameter), for purposes of illustration, with reference to the current display unit 232 as separate units, However, current reference unit 232 may be incorporated into a digital to analog converter 222, e.g., 226 digital to analog converter 222 may be used to convert the digital value to a first electrical reference parameter. 比较器237为电流比较器237,通过电流参考单元232电性连接于数模转换器222,并用以比较第一电参数(如:参考电流值)与对应发光光源214的工作驱动电流的第二电参数(如: 反馈电流值),并产生对应二输入电流差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S)晶体管240,MOS晶体管MO用以调整发光光源214的工作驱动电流,MOS晶体管240的栅极端与电流比较器237连接,并且接收驱动信号DRV,而MOS晶体管240的源极端接地,M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器260故障,及用以不想要的高频率电流引流经旁路电容器C接地。 The comparator 237 is a current comparator 237, the current through the reference cell 232 is electrically connected to a digital to analog converter 222, and for comparing the first electrical parameter (eg: the reference current value) corresponding to the work of the driving current of the second light source 214 electrical parameters (such as: a current feedback value), and generates a drive signal DRV second input current corresponding to a difference (eg: driving bias current), and current regulator 235 and the comparator 212 is connected to adjust the bias current according to at least one of the light emitting driving work drive current source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, the MOS transistor MO to adjust operation of the drive current of light source 214, the gate terminal of the current of the MOS transistor 240 comparator 237, and receives the driving signals DRV, and the MOS transistor 240 is a source terminal grounded, the drain terminal of transistor 240 M0S further connected via diode D light source 214, but also a diode D for protecting the capacitor C is grounded through the bypass diode D 214 light source controller 260 to avoid failures, and to unwanted high frequency current bypass capacitor C is grounded through the drainage.

[0044] 在具体应用中,电流控制器还包括检测器216,检测器216连接发光光源214并用以测量第二电参数(如:反馈电流值)。 [0044] In a particular application, the current controller further comprises a detector 216, detector 216 connected to light source 214 and to measure a second electrical parameters (such as: a current feedback value). 检测器216与发光光源214连接,检测器216包括一感应电阻Rs及一对MOS晶体管252a及252b〇MOS晶体管252a及252b的栅极端接地,MOS晶体管252b的漏极端与栅极端连接。 Detector 216 is connected to the light source 214, detector 216 comprises a sense resistor Rs, and a pair of MOS transistors 252a and 252b 252b〇MOS transistors 252a and a gate grounded, a drain terminal and a gate terminal of the MOS transistor 252b is connected. MOS晶体管252a的漏极端与电流比较器237连接,当流经发光光源214的驱动电流改变时,检测器电阻Rs两端上的电压FB还会随之改变,电压FB的改变造成M0S晶体管252a及252b的栅极偏置改变,使得流经M0S晶体管252a的漏极端的电流改变,当电流比较器237检测到流经MOS晶体管252b的电流与参考电流值有差异时,电流比较器237即产生对应所述差值的驱动信号DRV,驱动信号DRV调整电流调节器212的驱动电流, 例如,发光光源214的总点亮时间为5000小时,则预定驱动电流为5A、第一电参数(参考电流值)为5A,但因点亮时间过久,发光光源214的工作驱动电流降低为3A、第二电参数为3A,则电流与参考电流值之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增加,同理,如果流经发光光源214的工作驱动电流过大,则电流比较器237产生相当弱的驱动信号DRV,造 MOS transistor 252a and the drain terminal connected to the current comparator 237, when the driving current flowing through the light source 214 changes, the voltage on both ends of the detector FB resistor Rs will change accordingly, vary the voltage FB causes the transistors 252a and M0S 252b gate bias changes, so that the flowing current M0S drain terminal of transistor 252a changes when the difference current comparator 237 detects the current flowing through the reference current value of the MOS transistor 252b, i.e., the current comparator 237 generates a corresponding the difference of the drive signal DRV, the driving signal DRV current regulator to adjust the drive current 212, for example, light source 214 total lighting time of 5000 hours, the predetermined drive current. 5A, a first electrical parameter (the reference current value ) is. 5A, but the lighting time is too long, working light source driving current 214 is reduced. 3A, the second electrical parameter. 3A, then the difference between the current and the reference current value, that generates drive signal DRV relatively strong, causing the driving current working light source 214 is increased, the same token, if the operation of the drive current flowing through the light source 214 is too large, the current comparator 237 generates drive signal DRV relatively weak, making 发光光源214的工作驱动电流降低。 Working light source driving current 214 is reduced.

[0045]因此,可在电流控制器260中设置计时器221以计算总点亮时间,电流控制器260根据总点亮时间自动选择对应的数字参考值226,并据以增加工作驱动电流以补偿光衰现象。 [0045] Therefore, to calculate the total lighting time 221, the current controller 260 automatically selects the appropriate digital reference value 226 in accordance with the total lighting time timer provided in the current controller 260, and accordingly a driving current to compensate for increased working phenomenon of bad light. [0046]如图4所示,本申请另一个实施例提供一种电流驱动方法,以特定顺序执行各步骤,然而,若以适当电路执行时,所述步骤可以不限所述特定顺序执行,可以任何顺序同时进行或依次进行。 [0046] As shown in FIG. 4, a further embodiment of the present application provides a current driving method, the steps performed in a specific order, however, when executed In terms appropriate circuitry, the step may not be limited to the specific order of execution, simultaneously or in any order sequentially.

[0047] 步骤410,计算对应发光光源的总点亮时间的计时器,并转换发光光源的总点亮时间为数字参考值,其中数字参考值对应发光光源的预定驱动电流; 步骤420,然后转换数字参考值成第一电参数(电压或电流); 步骤430,测量对应发光光源的工作驱动电流的第二电参数(电压或电流); 步骤440,比较第一电参数与第二电参数; 步骤450,判断所测得的第一电参数与第二电参数之间是否有差异,若有差异,则执行步骤460,若无差异则结束; 步骤460,根据比较结果产生驱动偏置电流,以调整发光光源的工作驱动电流,并重复执行步骤430至450。 [0047] Step 410, the timer calculates the corresponding total lighting time of the light source, the light source and convert the total lighting time of a digital reference value, wherein the digital reference value corresponding to a predetermined light source driving current; step 420, and then converted a first digital reference value of an electrical parameter (voltage or current); step 430, corresponding to the second measuring electrical parameters (voltage or current) of the light source driving current work; step 440, comparing the first electrical parameter and the second electrical parameter; step 450, whether there is an electrical parameter between the first and second electrical parameters measured difference is determined, if the difference, step 460 is executed, if no difference is terminated; step 460, the bias current is generated according to the comparison result of the drive, to adjust the operating light source drive current, and repeat steps 430-450.

[0048]如图5所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连LEDM2 (l)-(n),LED 242 (l)-(n)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于LCD系统的背光光源,例如用于小型LCD系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( 0LED ) 等。 [0048] As shown in FIG 5, another embodiment of the present application provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series LEDM2 (l) - (n), LED 242 (l) - (n) can be connected in series, parallel connection, or series and parallel combinations are connected, may include a light source 214 with LCD backlight source system, for example for small LCD light LED backlight system, the LED backlight LED light source may include a variety of such white LED, a color LED and organic LED (0LED) and the like. 另外,电流控制器260,连接至少一'发光光源214,而电流控制器260包括:环境光感测器223、存储装置220、数模转换器222、比较器235及电流调节器212。 Further, the current controller 260, connected to at least a 'light source 214, and the current controller 260 includes: an ambient light sensor 223, memory 220, digital to analog converter 222, comparator 235 and a current regulator 212. 环境光感测器223感测显示装置前方的环境亮度。 Ambient light sensor 223 senses ambient brightness in front of the display device. 存储装置220,连接环境光感测器223,被配置为存储分别对应不同环境亮度的多个数字参考值226,其中每个数字参考值226对应至少一发光光源214的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 Storage device 220, ambient light sensor 223 is connected, is configured to store a plurality of digital reference values ​​respectively corresponding to different ambient brightness of 226, 226 wherein each of the digital reference value corresponding to a predetermined drive current at least a light source 214, a digital reference value desired operating conditions can be obtained by the simulation light source 214. 例如,如果发光光源214 的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成数字参考值并且储存于存储装置220中,由于人眼在比较亮的环境需要比较高的背光,才能看清楚显示装置上的内容,而在比较暗的环境,过高的背光会造成眼睛不舒适甚至伤害,此时则需要较低的背光照明。 For example, a preferred drive current value 214 if desired brightness luminance proportional to the current flowing through the light source driver 214 of the light source 214, the corresponding light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter and converted into a digital reference value stored in the memory device 220, since the human eye is relatively bright environments require relatively high back, to see the content on the display device, and in relatively dark environment, excessive backlight can cause eye discomfort or even injury, this time you need to lower backlighting. 数字参考226即针对不同的环境亮度进行不同程度的工作驱动电流的控制。 Reference numeral 226 degrees i.e. different operating control drive currents for different ambient brightness. 因此,可将发光光源214的预定驱动电流设定成与环境亮度成正比,也就是说,环境亮度越亮,则预定驱动电流越大,以增加工作驱动电流以产生较高的背光。 Therefore, the predetermined light source may be set to the driving current 214 proportional to the ambient brightness, i.e., the brighter the ambient light, the greater the predetermined drive current to increase the operating current to generate a higher driving a backlight. 数模转换器222,连接于存储装置220及用以转换显示装置前方的环境亮度的数字参考值226成第一电参数,例如:数模转换器222先将数字参考值226转换成模拟信号并且转呈模拟信号给电压参考单元230,电压参考单元230用以产生对应于模拟信号的参考电压信号(第一电参数),电压参考单元230显示为独立的单元,然而,电压参考单元230可以合并成数模转换器222,例如,数模转换器222可以用以将数字参考值226转换成第一电参数。 DAC 222, 226 coupled to a first electrical parameter and a storage device 220 for converting the digital reference value of the ambient brightness of the display in front of the apparatus, for example: Firstly, the digital-analog converter 222 the reference value 226 into an analog signal and forwarded to the analog signal voltage reference unit 230, a voltage reference unit 230 for generating an analog signal corresponding to the reference voltage signal (the first electrical parameter), the reference voltage unit 230 is shown as a separate unit, however, the reference voltage unit 230 may be combined to-analog converter 222, e.g., 226 digital to analog converter 222 may be used to convert the digital value to a first electrical reference parameter. 比较器235为电压比较器235,通过电压参考单元230电性连接于数模转换器222,并用以比较第一电参数(如:参考电压值)与对应发光光源214的工作驱动电流的第二电参数(如: 反馈电压值),并产生对应二输入电压差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S)晶体管240,M0S晶体管240用以调整发光光源214的工作驱动电流,M0S晶体管240的栅极端与电压比较器235连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地,MOS晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器260故障,及用以不想要的高频率电流引流经旁路电容器C接地。 Comparator 235 is a voltage comparator 235, a voltage reference unit 230 is electrically connected to a digital to analog converter 222, and for comparing the first electrical parameters: the drive current (e.g., reference voltage) corresponding to the second light source 214 electrical parameters (such as: a feedback voltage value), and generates a drive signal DRV corresponding to the two input voltage difference (eg: driving bias current), and current regulator 235 and the comparator 212 is connected to adjust the bias current according to at least one of the light emitting driving work drive current source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, transistor 240 M0S light source for adjusting the operation of the drive current 214, the voltage of the gate terminal of transistor 240 M0S comparator 235, and receives a drive signal DRV, and M0S the source terminal of transistor 240 is grounded, the drain terminal of the MOS transistor 240 is further connected via diode D light source 214, but also a diode D for protecting the capacitor C is grounded through the bypass diode D 214 light source controller 260 to avoid failures, and to unwanted high frequency current bypass capacitor C is grounded through the drainage.

[0049] 在具体应用中,电流控制器还包括检测器216,检测器216连接发光光源214并用以测量第二电参数(如:反馈电压值)。 [0049] In a particular application, the current controller further comprises a detector 216, detector 216 connected to light source 214 and to measure a second electrical parameter (eg: a feedback voltage value). 检测器216与发光光源214连接,检测器216包括检测器电阻Rs,检测器电阻Rs用以测定对应流经发光光源214的工作驱动电流的电压FB,检测器电阻Rs与电压比较器235的输入端连接,电压比较器235接收电压FB并且将与来自电压参考单元230的第一电参数(如:参考电压值)进行比较,并产生M0S晶体管240的栅极端的驱动信号DRV,驱动信号DRV根据电压FB与参考电压值之间的差值驱动M0S晶体管240的栅极端,M0S晶体管240根据驱动信号DRV调整发光光源214的工作驱动电流,例如,显示装置前方的环境亮度为2〇Onits,则预定驱动电流为5A、第一电参数(参考电压值)为120V,但此时发光光源214 的工作驱动电流仅为3A、第二电参数(电压FB)为100V,则电压FB与参考电压值之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增加,以产生较高的背光,同理,如果流经发光 Detector 216 is connected to the light source 214, detector 216 includes a detector resistor Rs, the resistor Rs detector, for measuring the input voltage corresponding to the driving current flowing through the FB working light source 214 of the detector resistor Rs 235 and a voltage comparator terminal is connected, the voltage comparator 235 receives a voltage FB and the first electrical parameter from the reference voltage unit 230: comparing (e.g., reference voltage), and generates the gate terminal of the driving signal DRV M0S transistor 240, according to the drive signal DRV the difference between the driving transistor M0S voltage FB with a reference voltage value of the gate terminal 240 of transistor 240 M0S adjusting the drive signal DRV according to the operation of the drive current of light source 214, e.g., brightness in front of a display environment is 2〇Onits means, the predetermined drive current of 5A, a first electrical parameter (reference voltage) of 120V, but at this time the light source driving current of only 214 work 3A, a second electrical parameter (FB voltage) of 100V, the voltage FB with a reference voltage value i.e., the difference between the generated drive signal DRV relatively strong, resulting in light emission operation of the driving current 214 is increased to produce a higher backlight, similarly, if the flow through the light emitting 源214的工作驱动电流过大,则电压比较器235产生相当弱的驱动信号DRV,造成发光光源214的工作驱动电流降低。 Work driving current source 214 is too large, the voltage comparator 235 generates a drive signal DRV is relatively weak, causing the work light source driving current 214 is reduced.

[0050]因此,可在电流控制器26〇中设置环境光感测器223感测显示装置前方的环境亮度,电流控制器26〇根据环境亮度自动选择对应的数字参考值226,并据以调整工作驱动电流。 [0050] Accordingly, the ambient light sensor may be provided in the current controller 223 senses 26〇 ambient brightness in front of the display device, the current controller 26〇 automatically select a corresponding digital reference value 226 in accordance with the ambient brightness, and accordingly adjust work drive current.

[0051]如图6所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连LEDM2 (l)-(n),LED242 (l)-(n)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于LCD系统的背光光源,例如用于小型LCD系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( 0LED ) 等。 [0051] As shown in FIG 6, another embodiment of the present application provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series LEDM2 (l) - (n), LED242 (l) - (n) can be connected in series, parallel connection, or series and parallel combinations are connected, it may include a light source 214 LCD backlight light source system, for example for small LCD light LED backlight system, the LED backlight LED light source may include a variety of such white LED, a color LED and organic LED (0LED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:环境光感测器223、存储装置220、数模转换器222、比较器235及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 includes: an ambient light sensor 223, memory 220, digital to analog converter 222, comparator 235 and a current regulator 212. 环境光感测器223^测显示装置前方的环境亮度。 ^ Ambient light sensor 223 measuring the ambient brightness in front of the display device. 存储装置22〇,连接环境光感测器223,被配置为存储分别对g不同环境亮度的多个数字参考值226,其中每个数字参考值226对应至少一发光光源214的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 22〇 storage means, connected to the ambient light sensor 223, respectively configured to store a plurality of digital reference values ​​of different ambient brightness of G 226, wherein each of the predetermined digital reference value 226 corresponding to the driving current of the at least one light source 214, the digital the reference value may be obtained by the desired operating conditions of the simulation light source 214. 例如,如果发光光源214 的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成数字参考值并且储存于存储装置220中,由于人眼在比较亮的环境需要比较高的背光,才能看清楚显示装置上的内容,而在比较暗的环境,过高的背光会造成眼睛不舒适甚至伤害,此时则需要较低的背光照明。 For example, a preferred drive current value 214 if desired brightness luminance proportional to the current flowing through the light source driver 214 of the light source 214, the corresponding light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter and converted into a digital reference value stored in the memory device 220, since the human eye is relatively bright environments require relatively high back, to see the content on the display device, and in relatively dark environment, excessive backlight can cause eye discomfort or even injury, this time you need to lower backlighting. 数字参考226即针对不同的环境亮度进行不同程度的工作驱动电流的控制。 Reference numeral 226 degrees i.e. different operating control drive currents for different ambient brightness. 因此,可将发光光源214的预定驱动电流设定成与环境亮度成正比,也就是说,环境亮度越亮,则预定驱动电流越大,以增加工作驱动电流以产生较高的背光。 Therefore, the predetermined light source may be set to the driving current 214 proportional to the ambient brightness, i.e., the brighter the ambient light, the greater the predetermined drive current to increase the operating current to generate a higher driving a backlight. 数模转换器222,连接于存储装置220及用以转换显示装置前方的环境亮度的数字参考值226成第一电参数,例如:数模转换器222先将数字参考值226转换成模拟信号并且转呈模拟信号给电流参考单元232,电流参考单元232用以产生对应于模拟信号的参考电流信号(第一电参数),为了说明起见,电流参考单元232显示为独立的单元,然而,电流参考单元232可以合并成数模转换器222,例如,数模转换器222可以用以将数字参考值226转换成第一电参数。 DAC 222, 226 coupled to a first electrical parameter and a storage device 220 for converting the digital reference value of the ambient brightness of the display in front of the apparatus, for example: Firstly, the digital-analog converter 222 the reference value 226 into an analog signal and forwarded to the analog signal is a current reference cell 232, current reference unit 232 for generating an analog signal corresponding to the reference current signal (the first electrical parameter), for purposes of explanation, the current reference cell 232 is shown as a separate unit, however, the reference current unit 232 may be incorporated into a digital to analog converter 222, e.g., 226 digital to analog converter 222 may be used to convert the digital value to a first electrical reference parameter. 比较器237为电流比较器237,通过电流参考单元232电性连接于数模转换器222,并用以比较第一电参数(如:参考电流值)与对应发光光源214的工作驱动电流的第二电参数(如:反馈电流值),并产生对应二输入电流差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S)晶体管240,MOS晶体管240用以调整发光光源214的工作驱动电流,M0S晶体管240的栅极端与电流比较器237连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地,M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器260故障,及用以不想要的高频率电流引流经旁路电容器C接地。 The comparator 237 is a current comparator 237, the current through the reference cell 232 is electrically connected to a digital to analog converter 222, and for comparing the first electrical parameter (eg: the reference current value) corresponding to the work of the driving current of the second light source 214 electrical parameters (such as: a current feedback value), and generates a drive signal DRV second input current corresponding to a difference (eg: driving bias current), and current regulator 235 and the comparator 212 is connected to adjust the bias current according to at least one of the light emitting driving work drive current source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, the MOS transistor 240 is used to adjust the operation of the drive current of the light source 214, the gate terminal of the current transistor M0S 240 comparator 237, and receives a drive signal DRV, and a source terminal grounded M0S transistor 240, the drain terminal of transistor 240 M0S further connected via diode D light source 214, but also a diode D for protecting the capacitor C is grounded through the bypass diode D 214 light source controller 260 to avoid failures, and to unwanted high frequency current bypass capacitor C is grounded through the drainage.

[0052] 在具体应用中,电流控制器还包括检测器216,检测器216连接发光光源214并用以测量第二电参数(如:反馈电流值)。 [0052] In a particular application, the current controller further comprises a detector 216, detector 216 connected to light source 214 and to measure a second electrical parameters (such as: a current feedback value). 检测器216与发光光源214连接,检测器216包括感应电阻Rs及一对M0S晶体管252a及252bDM0S晶体管252a及252b的栅极端接地,M0S晶体管252b 的漏极端与栅极端连接。 Detector 216 is connected to the light source 214, detector 216 comprises a sense resistor Rs and a pair of transistors 252a and 252bDM0S M0S transistors 252a and 252b of the gate grounded, a drain terminal and a gate terminal of the transistor 252b is connected M0S. MOS晶体管252a的漏极端与电流比较器237连接,当流经发光光源214的驱动电流改变时,检测器电阻Rs两端上的电压FB还会随之改变,电压FB的改变造成M0S晶体管252a及252b的栅极偏置改变,使得流经MOS晶体管252a的漏极端的电流改变,当电流比较器237检测到流经MOS晶体管252b的电流与参考电流值有差异时,电流比较器237 即产生对应所述差值的驱动信号DRV,驱动信号DRV调整电流调节器212的驱动电流,例如, 显示装置前方的环境亮度为200nits,则预定驱动电流为5A、第一电参数(参考电流值)为5A,但此时发光光源214的工作驱动电流仅为3A、第二电参数为3A,则电流与参考电流值之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增加,以产生较高的背光,同理,如果流经发光光源214的工作驱动电流过大,则电流比较器237产生相当弱的驱动信号DRV MOS transistor 252a and the drain terminal connected to the current comparator 237, when the driving current flowing through the light source 214 changes, the voltage on both ends of the detector FB resistor Rs will change accordingly, vary the voltage FB causes the transistors 252a and M0S 252b gate bias changes, flows through the MOS transistor so that the drain terminal 252a of the current changes, when a difference between the current comparator 237 detects a current flowing through the reference current value of the MOS transistor 252b, i.e., the current comparator 237 generates a corresponding the drive signal DRV difference, drive signal DRV current regulator to adjust the drive current 212, e.g., brightness in front of a display environment is 200nits means, the predetermined drive current of 5A, a first electrical parameter (reference current value) of 5A , but this time the working light source 214 only. 3A drive current, the second electrical parameter. 3A, then the difference between the current and the reference current value, that generates a drive signal DRV is relatively strong, resulting in operation of the driving current of light source 214 increased to produce a higher backlight, the same token, if the operation of the drive current flowing through the light source 214 is too large, the current comparator 237 generates a relatively weak drive signal DRV 造成发光光源214的工作驱动电流降低。 214 causing the work light source driving current is reduced.

[0053] 因此,可在电流控制器260中设置环境光感测器223以感测显示装置前方的环境亮度,电流控制器260根据环境亮度自动选择对应的数字参考值226,并据以调整工作驱动电流。 [0053] Accordingly, the display 223 may be provided to sense ambient light sensor controller 260 in front of the current brightness setting means, the current controller 260 automatically selects the appropriate digital reference value 226 in accordance with the ambient brightness, and accordingly adjustment drive current.

[0054] 如图7所示,本申请另一个实施例提供一种电流驱动方法,以特定顺序执行各步骤,然而,若以适当电路执行时,所述步骤可以不限所述特定顺序执行,可以任何顺序同时进行或依次进行。 [0054] As shown in FIG. 7, another embodiment of the present application provides a current driving method, the steps performed in a specific order, however, when executed In terms appropriate circuitry, the step may not be limited to the specific order of execution, simultaneously or in any order sequentially.

[0055]步骤411,感测对应显不装置前方的环境壳度的环境光感测器,并转换环境亮度为数字参考值,其中数字参考值对应发光光源的预定驱动电流; % x 步骤421,然后转换数字参考值成第一电参数(电压或电流); 步骤431,测量对应发光光源的工作驱动电流的第二电参数(电压或电流); 步骤441,比较第一电参数与第二电参数; ' 步骤451,判断所测得的第一电参数与第二电参数之间是否有差异,若有差异,则执行步骤妨1,若无差异时,则结束; 步骤461,根据比较结果产生驱动偏置电流,以调整发光光源的工作驱动电流,并重复执行步骤431至451。 [0055] Step 411, the sensing means corresponding to the ambient light sensor is not significant environmental case of the front of the ambient brightness and converted into a digital reference value, wherein the digital reference value corresponding to a predetermined light source driving current;% x step 421, then converts the digital value to a first electrical reference parameter (voltage or current); step 431, corresponding to the second electrical parameters measured operating light source driving current (voltage or current); step 441, comparing the first parameter and the second electric power parameter; 'step 451, whether there is an electrical parameter between the first and second electrical parameters measured difference is determined, if the difference, step a nuisance, if not the time difference is ended; step 461, based on the comparison generating a bias current drive to adjust the operating light source drive current, and repeat steps 431-451.

[0056]如图8所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连1^) 242 (1)-(11),1^0 242 (1)-(11)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于LCD系统的背光光源,例如用于小型10)系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( OLED ) 等。 [0056] As shown in FIG. 8, another embodiment of the present application provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series ^ 1) 242 (1) - (11), 0242 ^ 1 (1) - (11) can be connected in series, parallel connection, or series and parallel combinations are connected, the light emitting the light source 214 may include an LCD backlight light source system, for example, 10 small) system LED backlight light source, the light source may include various LED backlight LED, white LED, for example, a color LED and organic LED (OLED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:工作温度感测器224、存储装置220、数模转换器222、比较器235及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 comprising: a working temperature sensor 224, memory 220, digital to analog converter 222, comparator 235 and a current regulator 212. 工作温度感测器224感测发光光源214的工作温度。 Working temperature sensor 224 senses the light source 214 operating temperature. 存储装置22〇,连接工作温度感测器224,被配置为存储分别对应不同工作温度的多个数字参考值226,其中每个数字参考值226对应至少一发光光源214 的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 22〇 storage means, connected to the working temperature sensor 224 is configured to store a corresponding plurality of different working temperatures of 226 digital reference values, wherein each digital value 226 corresponds to a predetermined reference drive current of the at least one light source 214, reference numeral desired operation condition can be obtained by the simulation light source 214. 例如,如果发光光源214的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成数字参考值并且储存于存储装置220中,由于发光光源214 在不同的温度下,以相同的工作驱动电流发光光源214,会有不同的亮度,发光光源214的工作温度越高,会有越亮的亮度,因此需要降低工作驱动电流。 For example, a preferred drive current value 214 if desired brightness luminance proportional to the current flowing through the light source driver 214 of the light source 214, the corresponding light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter and converted into a digital reference value stored in the memory device 220, since the light source 214 at different temperatures, operating at the same light source driving current 214, have different brightness , light source 214 higher operating temperature, there will be more luminous brightness, it is necessary to reduce the operating current of the drive. 数字参考226即针对不同的工作温度进行不同程度的工作驱动电流的控制。 Reference numeral 226 degrees i.e. different operating control drive current for different operating temperatures. 因此,可将发光光源214的预定驱动电流设定成与工作温度成反比,也就是说,工作温度越高,则预定驱动电流越小,以减少工作驱动电流。 Therefore, the predetermined light source drive current is set to 214 and is inversely proportional to the operating temperature, i.e., the higher the temperature, the smaller the predetermined drive current to reduce the drive current work. 数模转换器222,连接于存储装置220及用以转换发光光源214的工作温度的数字参考值226成第一电参数,例如:数模转换器222先将数字参考值226转换成模拟信号并且转呈模拟信号给电压参考单元230,电压参考单元230用以产生对应于模拟信号的参考电压信号(第一电参数),电压参考单元230显示为独立的单元,然而,电压参考单元230可以合并成数模转换器222,例如,数模转换器222可以用以将数字参考值226转换成第一电参数。 DAC 222, coupled to the storage device 220 and converts the digital reference value for the light source 214 operating temperature of 226 to a first electrical parameter, for example: Firstly, the digital-analog converter 222 the reference value 226 into an analog signal and forwarded to the analog signal voltage reference unit 230, a voltage reference unit 230 for generating an analog signal corresponding to the reference voltage signal (the first electrical parameter), the reference voltage unit 230 is shown as a separate unit, however, the reference voltage unit 230 may be combined to-analog converter 222, e.g., 226 digital to analog converter 222 may be used to convert the digital value to a first electrical reference parameter. 比较器235为电压比较器235,通过电压参考单元230电性连接于数模转换器222,并用以比较第一电参数(如:参考电压值)与对应发光光源214的工作驱动电流的第二电参数(如:反馈电压值),并产生对应二输入电压差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S)晶体管240,M0S晶体管240用以调整发光光源214的工作驱动电流,M0S晶体管240的栅极端与电压比较器235连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地,M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器26〇故障, 及用以不想要的高频率电流引流经旁路电容器C接地。 Comparator 235 is a voltage comparator 235, a voltage reference unit 230 is electrically connected to a digital to analog converter 222, and for comparing the first electrical parameters: the drive current (e.g., reference voltage) corresponding to the second light source 214 electrical parameters (such as: a feedback voltage value), and generates a drive signal DRV corresponding to the two input voltage difference (eg: driving bias current), and current regulator 235 and the comparator 212 is connected to adjust the bias current according to at least one of the light emitting driving work drive current source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, transistor 240 M0S light source for adjusting the operation of the drive current 214, the voltage of the gate terminal of transistor 240 M0S comparator 235, and receives a drive signal DRV, and a source terminal grounded M0S transistor 240, the drain terminal of transistor 240 M0S further connected via diode D light source 214, but also a diode D for protecting the capacitor C is grounded through the bypass diode D 26〇 light source controller 214 to avoid failures, and to unwanted high frequency current bypass capacitor C is grounded through the drainage.

[0057] 在具体应用中,电流控制器还包括检测器216,检测器216连接发光光源214并用以测量第二电参数(如:反馈电压值)。 [0057] In a particular application, the current controller further comprises a detector 216, detector 216 connected to light source 214 and to measure a second electrical parameter (eg: a feedback voltage value). 检测器216与发光光源214连接,检测器216包括检测器电阻Rs,检测器电阻Rs用以测定对应流经发光光源214的工作驱动电流的电压FB,检测器电阻Rs与电压比较器235的一输入端连接,电压比较器235接收电压FB并且将与来自电压参考单元230的第一电参数(如:参考电压值)进行比较,并产生M0S晶体管240的栅极端的驱动信号DRV,驱动信号DRV根据电压FB与参考电压值之间的差值驱动M0S晶体管240的栅极端,MOS 晶体管240根据驱动信号DRV调整发光光源214的工作驱动电流,例如,发光光源214的工作温度为50度,则预定驱动电流为5A、第一电参数(参考电压值)为120V,但此时发光光源214 的工作驱动电流仅为3A、第二电参数(电压FB)为100V,则电压FB与参考电压值之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增加,以产生较高的亮度,同理,如果流经发光光 Detector 216 is connected to the light source 214, detector 216 includes a detector resistor Rs, the resistor Rs detector for measuring operation of the drive voltage corresponding to the FB current flowing through the light source 214, the detector resistor Rs 235 and a voltage comparator input terminal, the voltage comparator 235 receives a voltage FB and the first electrical parameter from the reference voltage unit 230: comparing (e.g., reference voltage), and generates the gate terminal of the driving signal DRV M0S transistor 240, the drive signal DRV the difference between the voltage value of the FB reference voltage driving the gate terminal of transistor 240 M0S, the MOS transistor 240 according to the driving signal DRV to adjust operation of the drive current of light source 214, e.g., light source 214 operating temperature is 50 degrees, the predetermined drive current of 5A, a first electrical parameter (reference voltage) of 120V, but at this time the light source driving current of only 214 work 3A, a second electrical parameter (FB voltage) of 100V, the voltage FB with a reference voltage value i.e., the difference between the generated drive signal DRV relatively strong, resulting in light emission operation of the driving current 214 is increased, to generate a high luminance, similarly, if the flow through the light emitting 214的工作驱动电流过大,则电压比较器235产生相当弱的驱动信号DRV,造成发光光源214的工作驱动电流降低。 Working excessive drive current 214, the voltage comparator 235 generates a drive signal DRV is relatively weak, causing the work light source driving current 214 is reduced.

[0058] 因此,可在电流控制器260中设置工作温度感测器224感测发光光源214的工作温度,电流控制器260根据工作温度自动选择对应的数字参考值226,并据以调整工作驱动电流。 [0058] Thus, 260 may be automatically selected corresponding to the digital reference value 226 of the current controller 260 provided in the operating temperature sensor 224 senses the temperature of the working light source 214, the current operating temperature according to the controller, and accordingly adjust the operation of the drive current.

[0059] 如图9所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连1^) 242 (1)-〇1),1^0 242 (1)-(11)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括一用于LCD系统的背光光源,例如用于小型LCD系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色1£D及有机LED ( OLED ) 等。 [0059] As shown in FIG, 9 another embodiment of the present application provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series ^ 1) 242 (1) -〇1), 0242 ^ 1 (1) - (11) can be connected in series, parallel connection, or series and parallel combinations are connected, the light emitting the light source 214 may include a light source for the backlight of the LCD system such as the system for small LCD backlight LED light source, LED light source may include various backlight LED, white LED, for example, 1 £ D color organic LED (OLED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:工作温度感测器224、存储装置220、数模转换器222、比较器235及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 comprising: a working temperature sensor 224, memory 220, digital to analog converter 222, comparator 235 and a current regulator 212. 工作温度感测器224感测发光光源214的工作温度。 Working temperature sensor 224 senses the light source 214 operating temperature. 存储装置220,连接工作温度感测器224,被配置为存储分别对应不同工作温度的多个数字参考值226,其中每个数字参考值226对应至少一发光光源214 的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 Storage device 220, connected to the working temperature sensor 224 is configured to store a corresponding plurality of different working temperatures of 226 digital reference values, wherein each of the predetermined digital reference value corresponding to the driving current 226 at least a light source 214, a digital reference value desired operating conditions can be obtained by the simulation light source 214. 例如,如果发光光源214的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成数字参考值并且储存于存储装置220中,由于发光光源214 在不同的温度下,以相同的工作驱动电流发光光源214,会有不同的亮度,发光光源214的工作温度越高,会有越亮的亮度,因此需要降低工作驱动电流。 For example, a preferred drive current value 214 if desired brightness luminance proportional to the current flowing through the light source driver 214 of the light source 214, the corresponding light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter and converted into a digital reference value stored in the memory device 220, since the light source 214 at different temperatures, operating at the same light source driving current 214, have different brightness , light source 214 higher operating temperature, there will be more luminous brightness, it is necessary to reduce the operating current of the drive. 数字参考226即针对不同的工作温度进行不同程度的工作驱动电流的控制。 Reference numeral 226 degrees i.e. different operating control drive current for different operating temperatures. 因此,可将发光光源214的预定驱动电流设定成与工作温度成反比,也就是说,工作温度越高,则预定驱动电流越小,以减少工作驱动电流。 Therefore, the predetermined light source drive current is set to 214 and is inversely proportional to the operating temperature, i.e., the higher the temperature, the smaller the predetermined drive current to reduce the drive current work. 数模转换器222,连接于存储装置220及用以转换发光光源214的工作温度的数字参考值226成第一电参数,例如:数模转换器222先将数字参考值226转换成模拟信号并且转呈模拟信号给电流参考单元232,电流参考单元232用以产生对应于模拟信号的参考电流信号(第一电参数),电流参考单元232显示为独立的单元,然而,电流参考单元232可以合并成数模转换器222,例如,数模转换器222可以用以将数字参考值226转换成第一电参数。 DAC 222, coupled to the storage device 220 and converts the digital reference value for the light source 214 operating temperature of 226 to a first electrical parameter, for example: Firstly, the digital-analog converter 222 the reference value 226 into an analog signal and forwarded to the analog signal is a current reference cell 232, current reference unit 232 for generating an analog signal corresponding to the reference current signal (the first electrical parameter), the current reference cell 232 is shown as a separate unit, however, the current reference cell 232 may be combined to-analog converter 222, e.g., 226 digital to analog converter 222 may be used to convert the digital value to a first electrical reference parameter. 比较器237为电流比较器237,通过电流参考单元232电性连接于数模转换器222,并用以比较第一电参数(如:参考电流值)与对应发光光源214的工作驱动电流的第二电参数(如:反馈电流值),并产生对应二输入电流差值的驱动信号DRV(如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(MOS)晶体管240,MOS晶体管240用以调整发光光源214的工作驱动电流,MOS晶体管240的栅极端与电流比较器237连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地,M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器2G0故障, 及用以不想要的高频率电流引流经旁路电容器C接地。 The comparator 237 is a current comparator 237, the current through the reference cell 232 is electrically connected to a digital to analog converter 222, and for comparing the first electrical parameter (eg: the reference current value) corresponding to the work of the driving current of the second light source 214 electrical parameters (such as: a current feedback value), and generates a drive signal DRV second input current corresponding to a difference (eg: driving bias current), and current regulator 235 and the comparator 212 is connected to adjust the bias current according to at least one of the light emitting driving work drive current source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (MOS) transistor 240, the MOS transistor 240 to adjust the operation of the drive current of light source 214, the gate terminal of the current of the MOS transistor 240 comparator 237, and receives a drive signal DRV, and a source terminal grounded M0S transistor 240, the drain terminal of transistor 240 M0S further connected via diode D light source 214, but also a diode D for protecting the capacitor C is grounded through the bypass diode D 2G0 light source controller 214 to avoid failures, and to unwanted high frequency current bypass capacitor C is grounded through the drainage.

[0060] 在具体应用中,电流控制器还包括检测器216,检测器216连接发光光源214并用以测量第二电参数(如:反馈电流值)。 [0060] In a particular application, the current controller further comprises a detector 216, detector 216 connected to light source 214 and to measure a second electrical parameters (such as: a current feedback value). 检测器216与发光光源214连接,检测器216包括感应电阻Rs及一对MOS晶体管252a及252KMOS晶体管252a及252b的栅极端接地,MOS晶体管252b 的漏极端与栅极端连接。 Detector 216 is connected to the light source 214, detector 216 comprises a sense resistor Rs, and a pair of MOS transistors 252a and 252b 252KMOS transistors 252a and a gate grounded, a drain terminal and a gate terminal of the MOS transistor 252b is connected. MOS晶体管252a的漏极端与电流比较器237连接,当流经发光光源214的驱动电流改变时,检测器电阻Rs两端上的电压FB还会随之改变,电压FB的改变造成M0S晶体管252a及252b的栅极偏置改变,使得流经M0S晶体管252a的漏极端的电流改变,当电流比较器237检测到流经M0S晶体管252b的电流与参考电流值有差异时,电流比较器237 即产生对应所述差值的驱动信号DRV,驱动信号DRV调整电流调节器212的驱动电流,例如, 发光光源214的工作温度为50度,则预定驱动电流为5A、第一电参数(参考电压值)为120V, 但此时发光光源214的工作驱动电流仅为3A、第二电参数(电压FB)为100V,则电压FB与参考电压值之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增力口,以产生较高的亮度,同理,如果流经发光光源214的工作驱动电流过大,则电压比较器235产生相当弱的 MOS transistor 252a and the drain terminal connected to the current comparator 237, when the driving current flowing through the light source 214 changes, the voltage on both ends of the detector FB resistor Rs will change accordingly, vary the voltage FB causes the transistors 252a and M0S 252b gate bias changes, so that the flowing current M0S drain terminal of transistor 252a changes when the difference current comparator 237 detects the current flowing through the reference current value M0S transistor 252b, the current comparator 237 which produce the corresponding drive signal DRV of the difference, the drive signal DRV current regulator to adjust the drive current 212, for example, light source 214 operating temperature is 50 degrees, the predetermined drive current. 5A, a first electrical parameter (the reference voltage value) 120V, but this time the driving current working light source 214 is only 3A, a second electrical parameter (FB voltage) of 100V, the difference between the voltage FB with a reference voltage value that is generated relatively strong drive signal DRV, resulting in light emission work current source 214 driving booster port to produce higher brightness. Similarly, if the light source 214 flows through the working drive current is too large, the voltage comparator 235 generates a relatively weak 驱动信号DRV,造成发光光源214的工作驱动电流降低。 Drive signal DRV, the driving current caused by the working light source 214 is reduced.

[0061]因此,可在电流控制器260中设置工作温度感测器224以感测发光光源214的工作温度,电流控制器260根据工作温度自动选择对应的数字参考值226,并据以调整工作驱动电流。 [0061] Thus, the light source 224 to sense the operating temperature of 214, the current controller 260 automatically selects the appropriate digital reference value 226 of the current controller 260 provided in the working temperature sensor according to the operating temperature, and accordingly adjustment drive current.

[0062]另外,在具体应用中,显示系统,可同时根据环境亮度感测及工作温度感测的结果,来调整工作驱动电流,例如显示系统可同时包括:环境光感测器223及工作温度感测器224。 [0062] Further, in a particular application, the display system, which can result in accordance with the sensed ambient light and sensed operating temperature, operation of the drive current is adjusted, for example, the display system may simultaneously comprise: an ambient light sensor 223 and the operating temperature sensor 224. 环境光感测器223感测显示装置前方的环境亮度,及工作温度感测器224感测发光光源214的工作温度,而存储装置220连接环境光感测器223及工作温度感测器224,被配置为存储分别对应不同环境亮度及不同工作温度的多个数字参考值226,其中每个数字参考值226 对应至少发光光源214的预定驱动电流,数字参考值可以由仿真发光光源214所需操作条件而得。 Ambient light sensor 223 senses ambient brightness in front of the display device, and a working temperature sensor 224 senses the temperature of the working light source 214, the ambient light sensor 220 is connected memory means 223 and a working temperature sensor 224, configured to store a luminance corresponding to different environments and different operating temperatures of the plurality of digital reference values ​​226, 226 wherein each of the digital reference value corresponding to at least a predetermined light source drive current, the reference numeral 214 may be operated by the value 214 required for the simulation light source conditions derived. 因此,电流控制器26〇可根据环境亮度及工作温度自动选择对应的数字参考值226,并据以调整工作驱动电流。 Accordingly, the current controller may automatically select a corresponding 26〇 digital reference value 226 with the ambient temperature and operating temperature, and accordingly a driving current adjustment.

[0063]如图10所示,本申请另一个实施例提供一种电流驱动方法,以特定顺序执行各步骤,然而,若以适当电路执行时,所述步骤可以不限所述特定顺序执行,可以任何顺序同时进行或依次进行。 [0063] As shown in FIG. 10, another embodiment of the present application provides a current driving method, the steps performed in a specific order, however, when executed In terms appropriate circuitry, the step may not be limited to the specific order of execution, simultaneously or in any order sequentially.

[0064]步骤412,感测对应发光光源的工作温度的工作温度感测器,并转换工作温度为数字参考值,其中数字参考值对应发光光源的预定驱动电流; 步骤4M,然后转换数字参考值成第一电参数(电压或电流); 步骤432,测量对应发光光源的工作驱动电流的第二电参数(电压或电流); 步骤442,比敉第一电参数与第二电参数; 步骤452,判断所测得的第一电参数与第二电参数之间是否有差异,若有差异,则执行步骤462,若无差异时,则结束; ' 步骤462,根据比较结果产生驱动偏置电流,以调整发光光源的工作驱动电流,并重复执行步骤432至452。 [0064] Step 412, corresponding to the sensed operating temperature of the light source operating temperature sensor, the operating temperature and converted to a digital reference value, wherein the digital reference value corresponding to a predetermined light source driving current; step 4M, converts the digital reference value and a first electrical parameters (voltage or current); step 432, corresponding to the second electrical parameters measured operating light source driving current (voltage or current); step 442, Mi than the first electrical parameter and the second electrical parameter; step 452 , whether there is an electrical parameter between the first and second electrical parameters measured difference is determined, if the difference, step 462 is executed, while if no difference is ended; 'step 462, according to the comparison result a bias current drive to adjust the operating light source drive current, and repeat steps 432-452.

[0065] $图11所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连1^) 242 (1)-(11),1^0 242 (1)-(11)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于LCD系统的背光光源,例如用于小型lcd系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( OLED ) 等。 As shown in the present application [0065] $ 11] Another embodiment provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may comprise a plurality of series ^ 1) 242 (1) - (11), 0242 ^ 1 (1) - (11) can be connected in series, parallel connection, or series and parallel combinations are connected, the light emitting the light source 214 may include an LCD backlight light source system, for example for small systems lcd LED backlight light source, the light source may include various LED backlight LED, white LED, for example, a color LED and organic LED (OLED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:使用条件225、 第一存储装置220、第一数模转换器222、第二存储装置253、第二数模转换器254、比较器235、光感测器251及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 comprising: a use condition 225, a first storage means 220, a first digital to analog converter 222, a second storage means 253, a second digital to analog converter 254, comparator 235, the optical sensor 251 and current regulator 212. 使用条件225可以包括感测发光光源214的工作温度、 发光光源214的总点亮时间、显示装置前方的环境亮度。 Conditions 225 may include a sensing light source 214 of the operating temperature, the total lighting time of the light source 214, the brightness of the environment in front of the display device. 第一存储装置22〇,连接使用条件225,被配置为存储分别对应不同使用条件225的多个第一数字参考值226,其中每个第一数字参考值226对应至少一发光光源214的预定驱动电流,第一数字参考值226可以由仿真发光光源214所需操作条件而得。 First storage means 22〇, connection condition 225, configured to store a plurality of different conditions respectively corresponding to the first digital reference value 225 226, wherein each first predetermined digital reference value 226 corresponding to the at least one light source drive 214 current, a first digital reference value 226 required by the operating conditions can be obtained by simulation light source 214. 例如,如果发光光源M4的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成第一数字参考值并且储存于弟一存储装置220中,由于在不同使用条件225下,发光光源214会有不同的亮度、工作驱动电流等需求,因此需要调整发光光源214的工作驱动电流。 For example, if the light source is proportional to the driving current flowing through M4 luminance of light source 214, preferably 214, the corresponding driving current value desired brightness light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter into a digital reference value and a first stored in a storage device Di 220, since the under use conditions 225, 214 have different brightness, the driving current of light source like work requirements, it is necessary to adjust the driving current of light source 214 of the work. 第一数字参考226即针对不同的使用条件225进行不同程度的工作驱动电流的控制。 I.e., a first digital reference 226 control operation of the drive current of different levels for different conditions of use 225. 第一数模转换器222,连接于第一存储装置220及用以转换发光光源214的工作温度的第一数字参考值226成第一电参数,例如:第一数模转换器222先将第一数字参考值226转换成模拟信号并且转呈模拟信号给第一电压参考单元230,第一电压参考单元230用以产生对应于模拟信号的参考电压信号(第一电参数),为了说明起见,第一电压参考单元230显示为独立的单元,然而,第一电压参考单元230可以合并成第一数模转换器222,例如,第一数模转换器222可以用以将第一数字参考值226转换成第一电参数。 A first digital to analog converter 222, connected to the first storage means 226 and 220 into a first electrical parameter value for a first reference digital converter operating temperature of light source 214, for example: a first digital to analog converter 222 of the first a reference digital value into an analog signal 226 and forwarded to an analog voltage reference signal to a first unit 230, a first voltage reference unit 230 for generating an analog signal corresponding to the reference voltage signal (the first electrical parameter), for purposes of explanation, a first voltage reference unit 230 is shown as a separate unit, however, a first reference voltage unit 230 may be combined into a first digital to analog converter 222, e.g., a first digital to analog converter 222 may be used to the first digital reference value 226 into a first electrical parameter. 另外,相同的,光感测器251可以感测发光光源214的亮度。 Further, the same optical sensor 251 may sense the light emission luminance of 214. 第二存储装置252,连接光感测器251,被配置为存储分别对应不同发光光源214的亮度的多个第二数字参考值253,其中每个第二数字参考值253对应至少一发光光源214的工作驱动电流,第二数字参考值253可以由仿真发光光源214所需操作条件而得。 Second storage means 252, connected to the light sensor 251, configured to store a corresponding plurality of different luminance light source 214 a second digital reference value 253, wherein each second reference digital value corresponding to the at least one light source 253 214 the operation of the drive current, the second reference digital value 253 can be obtained by the desired operating conditions of the simulation light source 214. 例如,如果发光光源214的亮度与流经发光光源214的工作驱动电流成正比,则对应发光光源214的亮度的工作驱动电流值可以由仿真发光光源214的操作条件而得,然后工作驱动电流值可以利用模拟对数字转换器转换成数字参考值253并且储存于第二存储装置252中。 For example, if the light emitting operation of the drive source 214 brightness proportional to the current flowing through the light source 214, the corresponding value of the luminance of the operation of the driving current of the light source 214 may be obtained by the simulation of the operating conditions of the light source 214, then the work driving current value may utilize analog to digital converter into a digital reference value 253 and stored in the second storage means 252. 第二数模转换器254, 连接于第二存储装置252及用以转换发光光源214的亮度的第二数字参考值253成第二电参数,例如:第二数模转换器222先将第二数字参考值253转换成模拟信号并且转呈模拟信号给第二电压参考单元255,第二电压参考单元255用以产生对应于模拟信号的第二电参数, 为了说明起见,第二电压参考单元255显示为独立的单元,然而,第二电压参考单元255可以合并成第二数模转换器254,例如,第二数模转换器254可以用以将第二数字参考值253转换成第二电参数。 A second digital to analog converter 254 is connected to the second storage means 252 and the second reference value to convert the digital luminance of light source 214 to a second 253 electrical parameters, for example: a second digital to analog converter 222 first second reference numeral 253 is converted into an analog signal and the analog signal is forwarded to the second voltage reference unit 255, a second voltage reference unit 255 for generating a second electrical signal corresponding to an analog parameter, for purposes of illustration, the second voltage reference unit 255 shown as separate units, however, the second reference voltage unit 255 may be combined into a second digital to analog converter 254, e.g., a second digital to analog converter 254 may be used to convert a second digital reference value 253 to a second electrical parameter . 比较器235为电压比较器235,通过第一电压参考单元230电性连接于第一数模转换器222及通过第二电压参考单元255电性连接于第二数模转换器254,并用以比较第一电参数(如:参考电压值)与第二电参数(如:反馈电压值),并产生对应二输入电压差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S)晶体管240,M0S晶体管240用以调整发光光源214的工作驱动电流,M0S晶体管240 的栅极端与电压比较器235连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地, M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D用以保护发光光源214避免控制器2e〇故障,及用以不想要的高频率电流引流经旁路电容 Comparator 235 is a voltage comparator 235, the first reference voltage unit 230 is electrically connected to the first digital to analog converter 222 and 255 is electrically connected to the second digital to analog converter 254 by a second voltage reference means, and for comparing a first electrical parameter (eg: reference voltage value) and the second electrical parameter (eg: a feedback voltage value), and generates a drive signal DRV corresponding to the two input voltage difference (eg: driving bias current), and current regulator 212 the comparator 235 connected to drive a bias current adjustment and operation of the drive current of at least a light source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, transistor 240 M0S to adjust the light source operation of the drive current 214, M0S transistor the gate terminal of the voltage comparator 240 is 235, and receives a drive signal DRV, and M0S transistor source terminal connected to ground 240, and a drain terminal M0S transistor 240 further through the diode D connected to light source 214, a diode D is also grounded through a bypass capacitor C, diode D for protecting the light source controller 214 2e〇 avoid failures, and to unwanted high-frequency current through the drainage bypass capacitor C接地。 C ground.

[0066]在具体应用中,电压比较器235接收第二电参数(如:反馈电压值)并且将与来自第一电压参考单元230的第一电参数(如:参考电压值)进行比较,并产生MOS晶体管240的栅极端的驱动信号DRV,驱动信号DRV根据电压FB与参考电压值之间的差值驱动M0S晶体管240的栅极端,M0S晶体管240根据驱动信号DRV调整发光光源214的工作驱动电流,例如,使用条件225为显示装置前方的环境亮度,若显示装置前方的环境亮度为200nits,则预定驱动电流为5A、第一电参数(参考电压值)为120V,但此时光感测器251感测发光光源214的亮度为100nits,亮度为100ni ts对应的工作驱动电流仅为3A、第二电参数(反馈电压值)为1 〇〇V,则第一电参数与第二电参数之间的差值即产生相当强的驱动信号DRV,造成发光光源214的工作驱动电流增加,以产生较高的背光,同理,如果发光光源214的亮度过亮,对应 [0066] In a particular application, the voltage comparator 235 receives a second electrical parameter (eg: a feedback voltage value) and the first electrical parameter with a reference voltage from a first unit 230 (e.g.,: the reference voltage value), and the gate of the MOS transistor 240 generating a driving signal DRV of the terminal, the gate terminal of the driving signal DRV M0S driving transistor 240 according to the difference between the voltage FB with a reference voltage value, M0S transistor 240 in accordance with operation of the drive current 214 to adjust the light source drive signal DRV , for example, conditions for the ambient light 225 in front of the display device, if the ambient brightness in front of the display device is a 200nits, the predetermined drive current. 5A, a first electrical parameter (reference voltage) of 120V, but this time the sensor 251 sensing luminance of light source 214 is 100nits, 100ni ts brightness corresponding to the driving current work only. 3A, a second electrical parameter (feedback voltage) of 1 〇〇V, between the second electrical parameters and the electrical parameters of the first That is a considerable difference between the strong drive signal DRV, the driving current caused by the working light source 214 is increased to produce a higher backlight, the same token, if the emission luminance of the light source 214 is too bright, the corresponding 的工作驱动电流过大,则电压比较器235产生相当弱的驱动信号DRV,降低发光光源214的工作驱动电流。 Operating the drive current is too large, the voltage comparator 235 generates a drive signal DRV is relatively weak, the drive to reduce the operating current of the light source 214.

[0067]因此,可在电流控制器26〇中设置使用条件225,电流控制器260根据使用条件225 自动选择对应的数字参考值226,以及不量测发光光源214的工作驱动电流,而是设置光感测器251,直接感测光亮度,以避免在相同电流下因总点亮时间或不同工作温度造成的亮度落差,使得调整工作驱动电流更为精确。 [0067] Thus, conditions may be provided using 26〇 current controller 225, current controller 260 automatically selects the appropriate digital reference value 226, and not the measurement operation of the drive source 214 of the light emission current according to the use conditions of 225, but is provided light sensor 251, directly sensing light luminance, the luminance drop due to avoid total lighting time or due to different operating temperatures at the same current, so that more accurate adjustment drive current.

[0068]如图12所示,本申请另一个实施例提供一种显示系统,包括:显示装置及电流控制器260,显示装置可为液晶显示装置,其具有至少一发光光源214,而至少一发光光源214可包括数个串连1^0 242 (1)-(11),1^0 242 (1)-(11)可以串连连接,并联连接,或串连与并联组合方式连接,发光光源214可以包括用于LCD系统的背光光源,例如用于小型LCD系统的LED背光光源,LED背光光源可以包括各种LED,例如白光LED,彩色LED及有机LED ( 0LED ) 等。 [0068] As shown, a further embodiment 12 of the present application provides a display system, comprising: a display device and a current controller 260, the display device may be a liquid crystal display device, having at least one light source 214 and at least a light source 214 may include a number series 0 242 ^ 1 (1) - (11), 0242 ^ 1 (1) - (11) can be connected in series, are connected in parallel, connected in series or parallel combinations, a light emitting the light source 214 may include an LCD backlight light source system, for example for small LCD light LED backlight system, the LED backlight LED light source may include a variety of such white LED, a color LED and organic LED (0LED) and the like. 另外,电流控制器260,连接至少一发光光源214,而电流控制器260包括:使用条件225、 第一存储装置220、第一数模转换器222、第二存储装置253、第二数模转换器254、比较器235、光感测器251及电流调节器212。 Further, the current controller 260, connected to the at least one light source 214, and the current controller 260 comprising: a use condition 225, a first storage means 220, a first digital to analog converter 222, a second storage means 253, a second digital to analog converter 254, comparator 235, the optical sensor 251 and current regulator 212. 使用条件225可以包括感测发光光源214的工作温度、 发光光源214的总点亮时间、显示装置前方的环境亮度。 Conditions 225 may include a sensing light source 214 of the operating temperature, the total lighting time of the light source 214, the brightness of the environment in front of the display device. 第一存储装置220,连接使用条件225,被配置为存储分别对应不同用条件225的多个第一数字参考值226,其中每个第一数字参考值226对应至少一发光光源214的预定驱动电流,第一数字参考值可以由仿真发光光源214所需操作条件而得。 The first storage device 220, the connection conditions of use 225, is configured to store a corresponding plurality of different conditions by a first digital reference value 225 226, wherein each of the first digital reference value 226 corresponding to at least a predetermined light source driving current 214 a first digital reference value required by the operating conditions can be obtained by simulation light source 214. 例如,如果发光光源214的亮度与流经发光光源214的驱动电流成正比,则对应发光光源214所需亮度的较佳驱动电流值可以由仿真发光光源214所需亮度的操作条件而得,然后较佳驱动电流值可以利用模拟对数字转换器转换成第一数字参考值并且储存于第一存储装置220中,由于在不同使用条件225下,发光光源214会有不同的亮度、工作驱动电流等需求,因此需要调整发光光源214的工作驱动电流。 For example, a preferred drive current value 214 if desired brightness luminance proportional to the current flowing through the light source driver 214 of the light source 214, the corresponding light source can be obtained by the simulated operating conditions of light source 214 to the desired brightness, and preferred drive current value may utilize analog to digital converter into a digital reference value and a first stored in the first storage device 220, since 225 under different conditions of use, light source 214 have different brightness, the driving current work, etc. requirements, it is necessary to adjust the driving current of light source 214 of the work. 第一数字参考226即针对不同的使用条件225进行不同程度的工作驱动电流的控制。 I.e., a first digital reference 226 control operation of the drive current of different levels for different conditions of use 225. 第一数模转换器222,连接于第一存储装置220及用以转换发光光源214的工作温度的第一数字参考值226成第一电参数, 例如:第一数模转换器222先将第一数字参考值226转换成模拟信号并且转呈模拟信号给给第一电流参考单元232,第一电流参考单元232用以产生对应于模拟信号的参考电流信号(第一电参数),为了说明起见,第一电流参考单元232显示为独立的单元,然而,第一电流参考单元232可以合并成第一数模转换器222,例如,第一数模转换器222可以用以将数字参考值226转换成第一电参数。 A first digital to analog converter 222, connected to the first storage means 226 and 220 into a first electrical parameter value for a first reference digital converter operating temperature of light source 214, for example: a first digital to analog converter 222 of the first a reference digital value into an analog signal 226 and forwarded to an analog signal to a first current reference unit 232, a first current reference unit 232 for generating an analog signal corresponding to the reference current signal (the first electrical parameter), for purposes of explanation , a first current reference unit 232 is shown as a separate unit, however, a first current reference unit 232 may be combined into a first digital to analog converter 222, e.g., a first digital to analog converter 222 may be used to convert the digital reference value 226 a first electrical parameter. 另外,相同的,光感测器251可以感测发光光源214的亮度。 Further, the same optical sensor 251 may sense the light emission luminance of 214. 第二存储装置252,连接光感测器251,被配置为存储分别对应不同发光光源214的亮度的多个第二数字参考值253,其中每个第二数字参考值253对应至少一发光光源214的工作驱动电流,第二数字参考值253可以由仿真发光光源214所需操作条件而得。 Second storage means 252, connected to the light sensor 251, configured to store a corresponding plurality of different luminance light source 214 a second digital reference value 253, wherein each second reference digital value corresponding to the at least one light source 253 214 the operation of the drive current, the second reference digital value 253 can be obtained by the desired operating conditions of the simulation light source 214. 例如,如果发光光源214的亮度与流经发光光源214的工作驱动电流成正比,则对应发光光源214的亮度的工作驱动电流值可以由仿真发光光源214的操作条件而得,然后工作驱动电流值可以利用模拟对数字转换器转换成数字参考值253并且储存于第二存储装置252中。 For example, if the light emitting operation of the drive source 214 brightness proportional to the current flowing through the light source 214, the corresponding value of the luminance of the operation of the driving current of the light source 214 may be obtained by the simulation of the operating conditions of the light source 214, then the work driving current value may utilize analog to digital converter into a digital reference value 253 and stored in the second storage means 252. 第二数模转换器254,连接于第二存储装置252及用以转换发光光源214的亮度的第二数字参考值253成第二电参数,例如: 第二数模转换器222先将第二数字参考值253转换成模拟信号并且转呈模拟信号给第二电流参考单元256,第二电流参考单元256用以产生对应于模拟信号的第二电参数,为了说明起见,第二电压参考单元256显示为独立的单元,然而,第二电压参考单元256可以合并成第二数模转换器254,例如,第二数模转换器254可以用以将第二数字参考值253转换成第二电参数。 A second digital to analog converter 254 is connected to the second storage means 252 and the second reference value to convert the digital luminance of light source 214 to a second 253 electrical parameters, for example: a second digital to analog converter 222 first second reference numeral 253 is converted into an analog signal and the analog signal is forwarded to a second current reference unit 256, a second current reference unit 256 for generating a second electrical signal corresponding to an analog parameter, for purposes of illustration, the second voltage reference unit 256 shown as separate units, however, the second reference voltage unit 256 may be combined into a second digital to analog converter 254, e.g., a second digital to analog converter 254 may be used to convert a second digital reference value 253 to a second electrical parameter . 比较器237为电流比较器237,通过第一电流参考单元232电性连接于第一数模转换器222及通过第二电压参考单元256电性连接于第二数模转换器254,并用以比较第一电参数(如:参考电流值)与第二电参数(如:反馈电流值),并产生对应二输入电流差值的驱动信号DRV (如:驱动偏置电流),及电流调节器212连接比较器235及根据驱动偏置电流调整至少一发光光源214的工作驱动电流,在本实施例中,电流调节器212包括金属氧化物半导体(M0S) 晶体管240,MOS晶体管240用以调整发光光源2丨4的工作驱动电流,M0S晶体管240的栅极端与电流比较器237连接,并且接收驱动信号DRV,而M0S晶体管240的源极端接地,M0S晶体管240的漏极端进一步经二极管D连接发光光源214,二极管D还经旁路电容器C接地,二极管D 用以保护发光光源214避免控制器260故障,及用以不想要的高频率电流引流经旁路电 The comparator 237 is a current comparator 237, a first current through reference cell 232 is electrically connected to the first digital to analog converter 222 and 256 is electrically connected to the second digital to analog converter 254 by a second voltage reference means, and for comparing a first electrical parameter (eg: the reference current value) and the second electrical parameter (eg: feedback current value), and generates a drive signal DRV second input current corresponding to a difference (eg: driving bias current), and current regulator 212 the comparator 235 connected to drive a bias current adjustment and operation of the drive current of at least a light source 214, in this embodiment, the current regulator 212 includes a metal oxide semiconductor (M0S) transistor 240, the MOS transistor 240 to adjust the light source 2 Shu operation of the drive current of 4, M0S transistor the gate terminal of the current comparator 240, 237, and receives a drive signal DRV, and M0S transistor source terminal connected to ground 240, the drain M0S transistor 240 to terminal further diode D is connected to light source 214 , the diode D is also grounded through a bypass capacitor C, diode D for protecting the light source 214 to avoid failures controller 260, and to unwanted high frequency current drainage through the bypass 器C接地。 C is grounded.

[0069]在具体应用中,当电流比较器237检测到第二电参数与第一电参数有差异时,电流比较器237即产生对应所述差值的驱动信号DRV,驱动信号DRV调整电流调节器212的驱动电流,例如,使用条件225为显示装置前方的环境亮度,若显示装置前方的环境亮度为200nits,则预定驱动电流为5A、第一电参数(参考电流值)为5A,但此时光感测器251感测发光光源214的亮度为lOOnits,亮度为lOOnits对应的工作驱动电流仅为3A、第二电参数(反馈电流值)为3A,则第一电参数与第二电参数之间的差值即产生一相当强的驱动信号DRV, 造成发光光源214的工作驱动电流增加,以产生较高的背光,同理,如果发光光源214的亮度过亮,对应的工作驱动电流过大,则电流比较器237产生相当弱的驱动信号DRV,降低发光光源214的工作驱动电流。 [0069] In a specific application, when the second electrical parameters and the first electrical parameter difference comparator 237 detects the current, i.e., current comparator 237 generates a corresponding drive signal DRV of the difference, the current regulator to adjust the drive signal DRV drive current 212, for example, conditions for the ambient light 225 in front of the display device, if the ambient brightness in front of the display device is a 200nits, the predetermined drive current. 5A, a first electrical parameter (reference current value). 5A, but this time sensor 251 senses the brightness of light source 214 is lOOnits, lOOnits brightness corresponding to the driving current operating only 3A, a second electrical parameters (current feedback value) of 3A, the first and second electrical parameters of the electrical parameters i.e., a difference between the generated drive signal DRV relatively strong, resulting in a working light source 214 increases the drive current to generate a higher backlight, the same token, if the luminance of the light source 214 is too bright, the corresponding operation of the drive current is too large , the current comparator 237 generates drive signal DRV relatively weak, light source 214 to reduce the operating current of the drive.

[0070]因此,可在电流控制器2e〇中设置使用条件225,电流控制器260根据使用条件225 自动选择对应的数字参考值2%,以及不量测发光光源214的工作驱动电流,而是设置光感测器251,直接感测光亮度,以避免在相同电流下因总点亮时间或不同工作温度造成的亮度落差,通过感测光亮度取得对应的工作驱动电流,使得调整工作驱动电流更为精确。 [0070] Thus, conditions may be provided using 2e〇 current controller 225, current controller 260 is automatically selected according to the conditions corresponding to the digital reference value 225 of 2%, and the work does not measure the driving current of the light source 214, but a light sensor 251, directly sensing light luminance, the luminance drop due to avoid total lighting time or due to different operating temperatures at the same current, the driving current corresponding to the work acquired by sensing light brightness, so that the driving current adjustment more precise.

[0071]如图I3所示,本申请另一个实施例提供一种电流驱动方法,本实施例中,以特定顺序执行各步骤,然而,若以适当电路执行时,所述步骤可以不限所述特定顺序执行,可以任何顺序同时进行或依次进行。 [0071] As shown in FIG I3, another embodiment of the present application provides a method of driving current, in the present embodiment, the steps performed in a specific order, however, if the appropriate circuitry when executed, the steps may not be limited said specific order of execution may be performed in any order simultaneously or sequentially.

[0072]步骤413,转换使用条件为第一数字参考值,其中第一数字参考值对应发光光源的预定驱动电流; 步骤423,然后转换数字参考值成第一电参数(电压或电流); 步骤4:33,感测对应发光光源的亮度,并转换发光光源的亮度为第二数字参考值,接着转换第二数字参考值成第二电参数(电压或电流),其中第二数字参考值对应发光光源的工作驱动电流; 步骤443,比较第一电参数与第二电参数; 步骤453,判断所测得的第一电参数与第二电参数之间是否有差异,若有差异,则执行步骤463,若无差异时,则结束; 步骤46%根据比较结果产生驱动偏置电流,以调整发光光源的工作驱动电流,并重复执行步骤433至453。 [0072] Step 413, a first digital converting condition using a reference value, wherein the first digital reference value corresponds to a predetermined light source driving current; step 423, and then converts the digital value to a first electrical reference parameter (voltage or current); Step 4:33, corresponding to the sensed brightness of the light source, and converts the luminance of the light source is a second digital reference value, a second digital reference value is then converted into a second electrical parameters (voltage or current), wherein a second digital reference value corresponding to the light source driving current work; step 443, comparing the first electrical parameter and the second electrical parameter; a step 453, whether there are differences between the first and second electrical parameters determining the electrical parameters measured, if the difference is performed step 463, if no time difference, the ends; 46% step generates a driving bias current based on the comparison to adjust the operating light source drive current, and repeat steps 433-453.

[0073]基于上述,本申请提供依据不同使用条件来控制液晶显示系统内发光光源的工作驱动电流的电流驱动方法及显不系统。 [0073] Providing different conditions based on the above, the liquid crystal display of the present application to control the current driving operation of the drive current to the light source system and a method not significantly system. 另,本申请除了可以米量测发光光源214的工作驱动电流外,也可不量测发光光源214的工作驱动电流,而是设置光感测器251,直接感测光亮度取得对应的工作驱动电流,以避免在相同电流下因总点亮时间或不同工作温度造成的亮度落差,通过感测光亮度取得对应的工作驱动电流,使得调整工作驱动电流更为精确。 Also, in addition to the present application can work meters measure light emission drive current source 214, the measurement may not work the driving current of light source 214, light sensor 251 is provided instead, direct sensing light to obtain brightness corresponding to the current operation of the drive to prevent the luminance drop due to the total lighting time or due to different operating temperatures at the same current, the driving current corresponding to the work acquired by sensing light brightness, the driving current so that more precise adjustment.

[0074]需要说明的是,在上述实施例中,对各个实施例的描述都各有侧重,某个实施例中没有详细描述的部分,可以参见其他实施例的相关描述。 [0074] Incidentally, in the above embodiment, the description of the various embodiments have different emphases, not described in detail a portion of the embodiments, reference may be described in other embodiments.

[0075]以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到各种等效的修改或替换,这些修改或替换都应涵盖在本申请的保护范围之内。 [0075] The above are only specific embodiments of the present disclosure, but the scope of the present application is not limited thereto, any skilled in the art in the art within the technical scope disclosed in the present application, may be readily figured equivalent modification or replacement, such modifications or replacements shall fall within the scope of the present application. 因此,本申请的保护范围应以权利要求的保护范围为准。 Accordingly, the scope of the present disclosure should be defined by the scope of the claims.

Claims (10)

1. 一种显示系统,其特征在于,包括: 显示装置,具有至少一发光光源;以及电流控制器,连接所述至少一发光光源,所述电流控制器包括: 环境光感测器,感测所述显示装置前方的环境亮度; 存储装置,连接所述环境光感测器,被配置为存储分别对应不同环境亮度的多个数字参考值,其中每个数字参考值对应所述至少一发光光源的预定驱动电流; 数模转换器,连接于所述存储装置及用以转换所述显示装置前方的环境亮度的数字参考值成第一电参数; 比较器,连接于所述数模转换器并用以比较所述第一电参数与对应所述至少一发光光源的工作驱动电流的第二电参数,并产生驱动偏置电流;及电流调节器,连接所述比较器及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流,其中所述驱动偏置电流对应所述第一电参数及所述第二电参 1. A display system comprising: a display device having at least one LED light source; and a current controller connected to said at least one light source, the current controller comprising: an ambient light sensor, sensing ambient brightness in front of the display device; storage means, connected to the ambient light sensor, configured to store a plurality of digital reference values ​​respectively corresponding to different ambient brightness, wherein each of the digital reference value corresponds to the at least one light source predetermined driving current; digital to analog converter connected to said storage means and for converting said digital reference display brightness of the environment in front of the apparatus to a first value of an electrical parameter; a comparator, coupled to the digital to analog converter and treated with to compare the first electrical parameter corresponding to the at least one second electrical parameter operating light source drive current, and generating a driving bias current; and a current regulator, connected to said comparator and to the driving bias current adjusting said at least one light source operating drive current, wherein the driving current corresponding to the first electrical bias and the second electrical reference parameter 之间的差值。 The difference between.
2. 如权利要求1所述的显示系统,其特征在于,所述比较器为电压比较器;所述第一电参数为对应所述至少一发光光源的预定驱动电流的电压;及所述第二电参数为对应所述至少一发光光源的工作驱动电流的反馈电压。 The display system as recited in claim 1, wherein said comparator is a voltage comparator; corresponding to the first electrical parameter is at least a predetermined light source drive current voltage; and the second two electrical parameters corresponding to the feedback voltage to the at least one light source operating drive current.
3. 如权利要求1所述的显示系统,其特征在于,所述比较器为电流比较器;所述第一电参数为所述对应至少一发光光源的预定驱动电流的电流值;及所述第二电参数为对应所述至少一发光光源的工作驱动电流的反馈电流。 And said; display system as claimed in claim 1, wherein said current comparator is a comparator; the first electrical parameter is the current value corresponding to at least a predetermined light source drive current a second electrical parameter corresponds to the at least one light source emitting a current feedback operation of the drive current.
4. 如权利要求1所述的显示系统,其特征在于,所述电流控制器还包括检测器,所述检测器连接所述至少一发光光源并用以测量所述第二电参数。 The display system as recited in claim 1, wherein said current controller further includes a detector, the detector connected to the at least one light source and to measure a second electrical parameter.
5. 如权利要求1所述的显示系统,其特征在于,所述至少一发光光源的预定驱动电流与环境亮度成正比。 5. The display system according to claim 1, wherein said at least one predetermined light source drive current is proportional to the brightness of the environment.
6. —种显示系统的电流驱动方法,其特征在于,包括: 感测对应显示装置前方的环境亮度的环境光感测器,并转换所述环境亮度为数字参考值,其中所述数字参考值对应至少一发光光源的预定驱动电流; 转换所述数字参考值成第一电参数; 测量对应所述至少一发光光源的工作驱动电流的第二电参数; 比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流。 6. - The method of the current driving different display system, characterized by comprising: sensing an ambient light sensor corresponding to display brightness of the environment in front of the apparatus, and converts the digital reference value for the ambient brightness, wherein said digital reference value corresponding to at least a predetermined light source driving current; converting the digital reference value to a first electrical parameter; measuring a second electrical parameter corresponds to the light source operating at least a driving current; comparing the first parameter and the electrical a second electrical parameter, and generating a driving bias current based on the comparison; and a light source operating according to the drive current of at least said drive bias current adjustment.
7. 如权利要求6所述的方法,其特征在于,所述至少一发光光源的预定驱动电流与环境亮度成正比。 7. The method according to claim 6, wherein said light source of a predetermined drive current is proportional to at least ambient brightness.
8. 如权利要求6所述的方法,其特征在于,所述第一电参数为对应所述至少一发光光源的预定驱动电流的电压;及所述第二电参数为对应所述至少一发光光源的工作驱动电流的反馈电压。 At least one light-emitting and the second electrical parameter corresponds to the; 8. A method as claimed in claim 6, wherein the first electrical parameter is a voltage corresponding to the at least a predetermined light source drive current work light source driving current feedback voltage.
9. 如权利要求6所述的方法,其特征在于,所述第一电参数为所述对应至少一发光光源的预定驱动电流的电流值;及所述第二电参数为一对应所述至少一发光光源的工作驱动电流的反馈电流。 9. The method according to claim 6, wherein the first electrical parameter is the current value corresponding to at least a predetermined light source driving current; and a second electrical parameter corresponds to at least a a working light source driving current feedback current.
10. —种显示系统的电流驱动方法,其特征在于,包括: 感测对应显示装置前方的环境亮度的环境光感测器,并转换所述环境亮度为数字参考值,其中所述数字参考值对应至少一发光光源的预定驱动电流; 转换所述数字参考值成第一电参数; 测量对应所述至少一发光光源的工作驱动电流的第二电参数; 比较所述第一电参数与所述第二电参数,并根据比较结果产生驱动偏置电流;及根据所述驱动偏置电流调整所述至少一发光光源的工作驱动电流; 所述至少一发光光源的预定驱动电流与环境亮度成正比; 所述驱动偏置电流对应所述第一电参数及第二电参数的差值。 10. - Method species current driving a display system, characterized by comprising: the display luminance corresponding to a sensing device in front of the ambient environment of the light sensor, and converts the digital reference value for the ambient brightness, wherein said digital reference value corresponding to at least a predetermined light source driving current; converting the digital reference value to a first electrical parameter; measuring a second electrical parameter corresponds to the light source operating at least a driving current; comparing the first parameter and the electrical a second electrical parameter, and generating a driving bias current based on the comparison; and a bias current adjusting said at least one light source operating according to the drive current driving; at least one light emitting luminance is proportional to the predetermined light source drive current environment ; the driving current corresponding to the first electrical bias and the second electrical parameter is a difference parameter.
CN201711016415.8A 2017-10-26 2017-10-26 Display system and current driving method thereof CN107808640A (en)

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