WO2018121620A1 - 一种手机屏幕亮度控制装置 - Google Patents

一种手机屏幕亮度控制装置 Download PDF

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Publication number
WO2018121620A1
WO2018121620A1 PCT/CN2017/119095 CN2017119095W WO2018121620A1 WO 2018121620 A1 WO2018121620 A1 WO 2018121620A1 CN 2017119095 W CN2017119095 W CN 2017119095W WO 2018121620 A1 WO2018121620 A1 WO 2018121620A1
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WIPO (PCT)
Prior art keywords
led
constant current
current controller
mobile phone
processing module
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PCT/CN2017/119095
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English (en)
French (fr)
Inventor
罗伟
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广州兴普电子科技有限公司
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Publication of WO2018121620A1 publication Critical patent/WO2018121620A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source

Definitions

  • the present invention relates to the field of mobile phone technology, and more particularly to a mobile phone screen brightness control device.
  • embodiments of the present invention provide a mobile phone screen brightness control device that partially or completely solves the above problems, to avoid the problem of screen flicker in a switch switching state, and the implementation circuit has a high power factor, and the circuit structure is simple and easy. The adjustment is achieved at a lower cost.
  • Mobile phone screen light source module rectification processing module, thyristor dimmer, first constant current controller, first electrolytic capacitor, first rectifier diode, second rectifier diode, first sampling resistor, second sampling resistor and third Sampling resistance
  • the rectification processing module is connected to an external power supply through the thyristor, and a normal phase output end of the rectification processing module is connected to one end of the first constant current controller and an anode of the first rectifying diode.
  • the negative phase output end of the rectification processing module is connected to the other end of the first constant current controller and grounded, and the control terminal A of the first constant current controller is grounded through the first sampling resistor and the third sampling resistor.
  • the first sampling resistor and the third sampling resistor are connected by a point C, a cathode of the first rectifier diode is connected to the mobile phone screen light source module, and a cathode of the first rectifier diode is also connected to the first electrolytic capacitor
  • the anode of the first electrolytic capacitor is grounded through the second sampling resistor and the third sampling resistor, and the cathode of the first electrolytic capacitor is also connected to the cathode of the second rectifier diode, The anode of the two rectifier diodes is grounded;
  • the first constant current controller when the voltage at the control terminal A of the first constant current controller is greater than the voltage at point C, the first constant current controller is turned on to provide an anode forward required to maintain conduction of the thyristor dimmer Current; the first electrolytic capacitor supplies power to the light source module when the rectified bus voltage is less than the conduction voltage drop of the light source module.
  • the mobile phone screen light source module specifically includes: a first LED light string and a second LED constant current controller processing module, wherein the second LED constant current controller processing module includes a second LED constant current controller and a fourth a sampling resistor, one end of the second LED constant current controller is connected to the cathode of the first LED string, and the other end is grounded, and the control end B of the second LED constant current controller is grounded through the fourth sampling resistor .
  • the mobile phone screen light source module specifically includes: a first LED light string, a second LED light string, a third LED light string, and a second LED constant current controller processing module, wherein the second LED constant current controller processes
  • the module includes a second LED constant current controller and a fourth sampling resistor, the control terminal B of the second LED constant current controller is connected to the cathode of the first LED string, and the control terminal D and the second LED lamp
  • the cathode of the string is connected, the control terminal E is connected to the cathode of the third LED string, the control terminal F of the second LED constant current controller is grounded, and the control terminal H of the second LED constant current controller passes through The fourth sampling resistor is grounded.
  • the rectification processing module is a rectifier bridge stack.
  • a mobile phone screen brightness control device provided by the embodiment of the invention includes:
  • a mobile phone screen light source module for providing a screen light source of the mobile phone
  • a rectification processing module connected to the screen light source module of the mobile phone, configured to rectify an input power source
  • a thyristor dimmer connected to the rectification processing module, configured to adjust brightness of the screen light source of the mobile phone
  • a first electrolytic capacitor processing module connected to the rectification processing module and the mobile phone screen light source module, configured to supply power to the LED light source module when the rectified bus voltage is less than a conduction voltage drop of the mobile phone screen light source module;
  • a first LED constant current controller processing module coupled to the rectification processing module and the first electrolytic capacitor processing module for providing an anode forward current required to maintain conduction of the thyristor dimmer.
  • the first electrolytic capacitor processing module specifically includes: a first electrolytic capacitor, a first rectifier diode, a second rectifier diode, a second sampling resistor, and a third sampling resistor, wherein a cathode of the first rectifier diode is connected to the cathode
  • An LED light source module wherein a cathode of the first rectifier diode is also connected to a positive pole of the first electrolytic capacitor, and a cathode of the first electrolytic capacitor is grounded through the second sampling resistor and the third sampling resistor,
  • the cathode of the first electrolytic capacitor is also connected to the cathode of the second rectifier diode, and the anode of the second rectifier diode is grounded.
  • the mobile phone screen light source module specifically includes: a first LED light string and a second LED constant current controller processing module, wherein the second LED constant current controller processing module includes a second LED constant current controller and a fourth sampling a resistor, wherein one end of the second LED constant current controller is connected to the cathode of the first LED string, and the other end is grounded, and the control terminal B of the second LED constant current controller is grounded through a fourth sampling resistor .
  • the mobile phone screen light source module specifically includes: a first LED light string, a second LED light string, a third LED light string, and a second LED constant current controller processing module, and the second LED constant current controller processing module
  • the second LED constant current controller and the fourth sampling resistor are included, wherein the control terminal B of the second LED constant current controller is connected to the cathode of the first LED string, and the control terminal D and the second LED lamp The cathode of the string is connected, the control terminal E is connected to the cathode of the third LED string, and the control terminal F of the second LED constant current controller is grounded, and the control terminal H of the second LED constant current controller Grounded through the fourth sampling resistor.
  • the rectification processing module is a rectifier bridge stack.
  • it also includes an input control switch connected to an external power supply.
  • a mobile phone screen brightness control device includes a mobile phone screen light source module for providing a mobile phone screen light source; and a rectification processing module connected to the mobile phone screen light source module for rectifying the input power; a thyristor dimmer connected to the rectification processing module, configured to adjust brightness of the screen light source of the mobile phone; and a first electrolytic capacitor processing module connected to the rectification processing module and the mobile phone screen light source module, When the rectified bus voltage is less than the conduction voltage drop of the mobile phone screen light source module, supplying power to the mobile phone screen light source module; processing with the first constant current controller connected to the rectification processing module and the first electrolytic capacitor processing module a module for providing an anode forward current required to maintain conduction of the thyristor dimmer, enabling the thyristor dimmer to be quickly activated when the next cycle is started, avoiding the mobile phone in the switching state of the switch
  • the screen light source has a problem of flashing lights, and since the thyristor d
  • the stroboscopic component passing through the screen light source of the mobile phone is eliminated by the first electrolytic capacitor, the stroboscopic phenomenon can be avoided, and the working input is widened.
  • the voltage range enables the screen light source of the mobile phone to continue to work when the rectified bus voltage is less than the conduction voltage drop of the mobile phone screen light source, thereby improving the light effect intensity.
  • FIG. 1 is a waveform diagram of a bus voltage of a rectified electrolytic capacitor in a mobile phone screen brightness control device according to the present invention
  • FIG. 2 is a schematic diagram showing the circuit structure of a specific embodiment of a screen brightness control device for a mobile phone according to the present invention
  • FIG. 3 is a schematic diagram showing the circuit structure of a second embodiment of a screen brightness control device for a mobile phone according to the present invention.
  • the core of the invention is that the screen brightness control device of the mobile phone provides the screen light source of the mobile phone through the screen light source module of the mobile phone; the rectification processing module connected to the screen light source module of the mobile phone is used for rectifying the input power; and the controllable connection with the rectification processing module is controllable a silicon dimmer is used for adjusting the brightness of the screen light source of the mobile phone; a first electrolytic capacitor processing module connected to the rectification processing module and the mobile phone screen light source module is used when the rectified bus voltage is smaller than the guide of the mobile phone screen light source module Supplying power to the mobile phone screen light source module when the voltage drops; the first constant current controller processing module connected to the rectification processing module and the first electrolytic capacitor processing module is configured to provide maintenance of the thyristor dimming The anode forward current required for conduction.
  • the first electrolytic capacitor processing module may include: a first electrolytic capacitor, a first rectifier diode, a second rectifier diode, a second sampling resistor, and a third sampling resistor, wherein the first a cathode of the rectifier diode is connected to the mobile phone screen light source module, such as an LED light source module, a cathode of the first rectifier diode is also connected to a positive pole of the first electrolytic capacitor, and a cathode of the first electrolytic capacitor passes the second The sampling resistor and the third sampling resistor are grounded, the cathode of the first electrolytic capacitor is also connected to the cathode of the second rectifier diode, and the anode of the second rectifier diode is grounded.
  • the LED light source module may include: a first LED light string and a second LED constant current controller processing module, where the The two LED constant current controller processing module includes a second LED constant current controller and a fourth sampling resistor, wherein one end of the second LED constant current controller is connected to the cathode of the first LED string, and the other end is grounded, and The control terminal B of the second LED constant current controller is grounded through the fourth sampling resistor.
  • the LED light source module also adopts other methods.
  • the LED light source module may include: a first LED light string and a second LED light string.
  • the second LED constant current controller processing module comprising a second LED constant current controller and a fourth sampling resistor, wherein the second LED constant current
  • the control terminal B of the controller is connected to the cathode of the first LED light string
  • the control terminal D is connected to the cathode of the second LED light string
  • the control terminal E is connected to the cathode of the third LED light string.
  • the second LED constant current control The control terminal F of the second LED constant current controller is grounded through the fourth sampling resistor, and the LED light source module is not specifically limited herein.
  • the first electrolytic capacitor processing module connected to the rectification processing module and the mobile phone screen light source module, when the rectified bus voltage is smaller than the guide of the mobile phone screen light source module When the voltage drops, the first electrolytic capacitor processing module can supply power to the mobile phone screen light source module; in addition, the first LED constant current controller processing module connected to the rectification processing module and the first electrolytic capacitor processing module The anode forward current required to maintain the conduction of the thyristor dimmer can be provided, so that the thyristor dimmer can be quickly started when the next cycle starts, thereby avoiding the appearance of the mobile phone screen when the switch is switched.
  • the problem of flicker, and the rapid conduction of the thyristor dimmer improves the active power of the circuit, that is, the circuit has a high power factor value, easy to implement adjustment, and the circuit structure is simple, the cost is low, and in addition,
  • the first electrolytic capacitor eliminates the stroboscopic component of the screen light source of the mobile phone, avoids stroboscopic phenomenon, and widens the working input Pressure range, the phone screen source remain in operation during the rectified bus voltage is less than the source phone screen voltage drop, improving the efficiency of light intensity.
  • FIG. 1 there is shown a diagram of a bus voltage waveform of an electrolytic capacitor after rectification in a mobile phone screen brightness control device according to the present invention.
  • the rectified bus voltage waveform in this embodiment is a non-sinusoidal wave.
  • the thyristor dimmer is turned on at time t1, turned off at time t2, and is turned off at another time.
  • the thyristor dimmer is re-conducted, and the cycle is continued.
  • the power supply can be supplied to the mobile phone screen such as the LED lamp through the electrolytic capacitor, that is, within the interval of t2 and t3.
  • the mobile phone screen, such as the LED light can be kept lit, and will not be described here.
  • FIG. 2 is a schematic diagram showing the circuit structure of a first embodiment of a screen brightness control device for a mobile phone according to the present invention.
  • This embodiment is applicable to a linear single-segment stroboscopic method for dimming.
  • the thyristor dimmer is used to control the load brightness of the mobile phone screen light source (the LED lamp in this embodiment).
  • the rectification is performed.
  • the processing module may adopt a rectifier bridge stack BR1
  • the mobile phone screen light source module may include a first LED light string and a first LED constant current controller processing module for performing constant current control on the first LED light string, and the first LED constant current control
  • the processor processing module may include a first LED constant current controller and a first resistor
  • the second constant current controller processing module includes a second constant current controller and a second resistor, and further, facilitates input power control, and may further include a power source
  • the switch specifically, the mobile phone screen brightness control device of the embodiment mainly includes:
  • LED constant current controller 1 ie, first LED constant current controller
  • LED constant current controller 2 ie, second LED constant current controller
  • sampling resistors R1, R2, R3, R4 ie, the first sampling resistor, the second sampling resistor, the third sampling resistor, the fourth sampling resistor
  • the LED string ie, the first LED string, in practice, the first LED string can include, for example, three LED bead It can also be other numbers of LED lamp beads, which are not specifically limited here, and the connection relationship of each component in the specific circuit is as follows:
  • the rectifier bridge stack BR1 is connected to the external power supply through the power switch S0 and the thyristor dimmer BG1.
  • the positive phase output of the rectifier bridge stack BR1 is connected to one end of the LED constant current driver 1 and the anode of the rectifier diode VD1, and the rectifier bridge stack BR1
  • the negative phase output terminal is connected to the other end of the LED constant current driver 1 and grounded, and the control terminal A of the LED constant current driver 1 is grounded through the sampling resistors R1 and R3;
  • the cathode of the rectifier diode VD1 is connected to the anode of the LED string, and the rectifier diode
  • the cathode of the VD1 is connected to the anode of the electrolytic capacitor C1;
  • the cathode of the electrolytic capacitor C1 is connected to the sampling resistor R3 through the sampling resistor R2, and the cathode of the electrolytic capacitor C1 is connected to the cathode of the rectifier dio
  • the thyristor dimmer BG1 triggers conduction at time t1, adjusts the thyristor dimmer BG1, and the bus voltage Vin continues to rise.
  • the LED constant current controller 1 detects the control terminal.
  • a point voltage when the voltage at point A is less than the voltage at point C, the LED constant current controller 1 is turned off, and the electrolytic capacitor C1 is charged through the bus bar, as the bus voltage Vin rises, when the bus voltage Vin>V LED string (ie, the bus voltage is greater than the conduction voltage drop of the LED light string), the screen light source of the mobile phone is the LED light string, and the thyristor dimmer BG1 is continuously adjusted, and the LED light string of the mobile phone screen light is gradually brightened, and can be controlled by continuous adjustment.
  • the brightness of the LED string increases, during which the electrolytic capacitor C1 continues to charge; during the T1 period, when the bus voltage reaches the maximum, the brightness of the LED screen of the mobile phone screen source is also maximized.
  • the thyristor dimmer BG1 is adjusted.
  • the brightness of the LED string is correspondingly reduced, when the bus voltage Vin ⁇ V LED string
  • the electrolytic capacitor C1 supplies power to the screen light source of the mobile phone, that is, the LED light string.
  • the current flow direction of the load circuit formed at this time is: electrolytic capacitor C1, LED light string, LED constant current driver 2, sampling resistor R4 and rectifier diode VD2;
  • the LED constant current controller 1 detects the voltage at the control terminal A. When the voltage at the A point is greater than the voltage at the C point, the LED constant current controller 1 is turned on, and at time t2, the thyristor is adjusted. The optical device triggers the shutdown, the LED constant current controller 1 can provide the anode forward current necessary for maintaining the conduction of the thyristor dimmer BG1, and the electrolytic capacitor C1 supplies power to the LED string to continuously provide the LED string load.
  • the electrolytic capacitor C1 is charged through the bus bar, and the LED constant current controller 1 detects the voltage at the control terminal A.
  • the LED constant current controller 1 is turned off, and continues.
  • the first electrolytic capacitor processing module connected to the rectification processing module and the LED light source module, when the rectified bus voltage is smaller than the mobile phone screen light source, that is, the LED light source module
  • the first electrolytic capacitor processing module can supply power to the mobile phone screen light source, that is, the LED light source module; in addition, the first LED connected to the rectification processing module and the first electrolytic capacitor processing module is constant
  • the flow controller processing module can provide an anode forward current required to maintain the conduction of the thyristor dimmer, so that the thyristor dimmer can respond quickly when the next cycle starts, that is, the silicon control can be adjusted.
  • the optical device can be quickly started, avoiding the problem that the screen light source of the mobile phone flickers under the switch state, and the fast conduction of the thyristor dimmer improves the active power of the circuit, that is, the realization circuit has a high power factor value, and is easy to implement.
  • Adjustment, and the circuit structure is simple, the required cost is low, and in addition, the stroboscopic light passing through the screen light source of the mobile phone is eliminated by the first electrolytic capacitor
  • the stroboscopic phenomenon can be avoided, and the working input voltage range is widened, so that the LED light string of the screen light source of the mobile phone continues to maintain the working state when the voltage of the busbar after rectification is lower than the conduction voltage drop of the LED screen light source of the mobile phone, thereby improving the working state.
  • FIG. 3 is a schematic diagram showing the circuit structure of a second embodiment of a screen brightness control device for a mobile phone according to the present invention.
  • the rectification processing module may adopt a rectifier bridge stack
  • the LED light source module of the mobile phone screen light source module may include: a first LED light string, a second LED light string, a third LED constant current controller processing module, the second LED constant current controller processing module comprising a second LED constant current controller and a fourth sampling resistor, wherein the The control terminal B of the two LED constant current controller is connected to the cathode of the first LED string, the control terminal D is connected to the cathode of the second LED string, and the control terminal E and the cathode of the third LED string Connected, in addition, the control terminal F of the second LED constant current controller is grounded, and the control terminal H of the second LED constant current controller is grounded through the fourth sampling resistor, and further, the input power control is facilitated, and Including the power switch, and the specific mobile phone screen brightness control device mainly includes:
  • LED constant current controller 1 ie, first LED constant current controller
  • LED constant current controller 2 ie, the second LED constant current controller
  • sampling resistors R1, R2, R3, R4 ie, the first sampling resistor, the second sampling resistor, the third sampling resistor, the fourth sampling resistor
  • Three string LED string LED string 1 (ie the first LED string), LED string 2 (ie the second LED string), LED string 3 (the third LED string), the first in practice
  • the LED string, the second LED string and the third LED string have the same voltage and the number of the bead, for example, the number of the bead is 3 or other quantities, which is not specifically limited herein, but in a specific circuit.
  • the connection relationship of each component is as follows:
  • the rectifier bridge stack BR1 is connected to the external power supply through the power switch S0 and the thyristor dimmer BG1.
  • the positive phase output of the rectifier bridge stack BR1 is connected to one end of the LED constant current driver 1 and the anode of the rectifier diode VD1, and the rectifier bridge stack BR1
  • the negative phase output terminal is connected to the other end of the LED constant current driver 1 and grounded.
  • the control terminal A of the LED constant current driver 1 is grounded through the resistors R1 and R3; the cathode of the rectifier diode VD1 is connected to the anode of the LED string 1 and is simultaneously rectified.
  • the cathode of the diode VD1 is connected to the anode of the electrolytic capacitor C1; the cathode of the electrolytic capacitor C1 is connected to the resistor R3 through the resistor R2, and the cathode of the electrolytic capacitor C1 is connected to the cathode of the rectifier diode VD2, and the anode of the rectifier diode VD2 is grounded; the cathode of the LED string 1 Connect the B terminal of the LED constant current controller 2, while the cathode of the LED string 1 is connected to the anode of the LED string 2, and the cathode of the LED string 2 is connected to the control terminal D of the LED constant current controller 2, and the LED lamp
  • the cathode of the string 2 is connected to the anode of the LED string 3, the cathode of the LED string 3 is connected to the control terminal E of the LED constant current controller 2, and the control terminal H terminal of the LED constant current controller 2 is grounded through the resistor R4, while the LED is constant Flow controller
  • the thyristor dimmer BG1 triggers conduction at time t1, adjusts the thyristor dimmer BG1, and the bus voltage Vin continues to rise.
  • the LED constant current controller 1 detects the control terminal. A point voltage, when the voltage at point A is less than the voltage at point C, the LED constant current controller 1 is turned off, and the electrolytic capacitor C1 is charged through the bus bar.
  • the thyristor dimmer BG1 is adjusted.
  • the brightness of the LED string is correspondingly reduced, when the bus voltage V LED string 1 + V LED Light string 2 ⁇ Vin ⁇ V LED string 1 +V LED string 2 +V LED string 3 (ie bus voltage is greater than the LED voltage string 1 and LED string 2 after the conduction voltage drop, but less than the LED string 1.
  • the three-stage LED light string can be powered by the electrolytic capacitor C1;
  • the LED constant current controller 1 detects the voltage of the control terminal A.
  • the LED constant current controller 1 provides the anode forward current necessary to maintain the conduction of the thyristor dimmer BG1, and the electrolytic capacitor C1 continuously supplies the energy required for the LED load until the next The one-cycle thyristor dimmer BG1 triggers conduction again; during the T2 period, the thyristor dimmer BG1 triggers conduction at time t3, and adjusts the thyristor dimmer BG1, as the bus voltage Vin rises, The electrolytic capacitor C1 is charged through the bus bar, and the LED constant current controller 1 detects the voltage at the control terminal A.
  • the LED constant current controller 1 When the voltage at the point A is less than the voltage at the point C, the LED constant current controller 1 is turned off, and the thyristor dimmer is continuously adjusted.
  • the bus voltage Vin>V LED string 1 ie, the bus voltage is greater than the conduction voltage drop of the LED string 1
  • the LED string 1 is bright, and the LED string 1 is powered by the power supply, and the subsequent control process repeats the above. The control process is not repeated here.
  • the mobile phone screen brightness control device of the embodiment drives the multi-segment LED light string (for example, the three-segment LED light string of the embodiment) through the LED constant current driver 2, and can be applied to the linear three-string dimming LED driving circuit, and
  • the LED constant current driver 1 provides the anode forward current necessary to maintain the conduction of the thyristor dimmer, enabling the thyristor dimmer to be started up quickly in the next cycle, avoiding LED switching in the switching state.
  • the lamp has a flashing problem, and since the thyristor dimmer is quickly turned on, the active power of the circuit is improved, that is, the circuit has a high power factor value, the adjustment is easy, and the circuit structure is simple and the required cost is low.
  • the stroboscopic component passing through the LED light source is eliminated by the first electrolytic capacitor, the stroboscopic phenomenon can be avoided, and the working input voltage range is widened, so that the bus voltage of the LED light string after rectification is smaller than the conduction voltage drop of the LED light source.

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Abstract

一种手机屏幕亮度控制装置，其包括LED光源模块、整流处理模块、可控硅调光器（BG1）、第一电解电容器处理模块、第一LED恒流控制器处理模块，由于第一LED恒流控制器处理模块可提供维持可控硅调光器（BG1）导通所需的阳极正向电流，可使可控硅调光器（BG1）在下一周期启动时，能够快速启动，避免了在开关切换状态下LED灯出现灯闪的问题，且由于可控硅调光器（BG1）快速导通提高了电路的有功功率，即其实现电路具有高功率因素值，易于实现调节，而且电路结构简单，所需成本较低，另外，通过第一电解电容器（C1）消除通过LED光源的频闪分量，可避免频闪现象，且加宽了工作输入电压范围，使LED灯串在整流后的母线电压小于LED光源的导通压降时继续保持工作状态，提高了光效强度。

Description

一种手机屏幕亮度控制装置 技术领域
本发明涉及手机技术领域，更具体的说，本发明涉及一种手机屏幕亮度控制装置。
背景技术
随着智能手机的出现，手机屏幕已成为手机中最重要的组成部件，通常，在不同的使用环境，需要根据具体情况调节屏幕亮度，例如，在昏暗的环境下需要调高手机屏幕的亮度，或者在强光下，调高手机亮度以便于用户查看，但现有技术中调节切换手机屏幕亮度时会产生闪烁，长期使用对用户健康不利，如何方便的调节手机屏幕亮度是业界面临的问题。
发明内容
鉴于上述问题，本发明实施例提供了一种部分或全部解决上述问题的手机屏幕亮度控制装置，以避免开关切换状态下屏幕闪烁的问题，且其实现电路具有高功率因数，电路结构简单，易于实现调节，所需成本较低。
为了解决上述技术问题，本申请采用如下技术方案：
根据本发明实施例的一种手机屏幕亮度控制装置，其包括：
手机屏幕光源模块、整流处理模块、可控硅调光器、第一恒流控制器、第一电解电容器、第一整流二极管、第二整流二极管、第一采样电阻、第二采样电阻及第三采样电阻；
所述整流处理模块通过所述可控硅调控器与外接电源相连，所述整流处理 模块的正相输出端连接所述第一恒流控制器的一端及所述第一整流二极管的阳极，所述整流处理模块的负相输出端与所述第一恒流控制器的另一端相连后接地，所述第一恒流控制器的控制端A通过第一采样电阻和第三采样电阻接地，所述第一采样电阻和所述第三采样电阻通过C点相连，所述第一整流二极管的阴极连接所述手机屏幕光源模块，所述第一整流二极管的阴极同时也连接所述第一电解电容器的正极，所述第一电解电容器的负极通过所述第二采样电阻和所述第三采样电阻接地，所述第一电解电容器的负极同时也连接所述第二整流二极管的阴极，所述第二整流二极管的阳极接地；
其中当所述第一恒流控制器控制端A点电压大于C点电压时，所述第一恒流控制器导通以提供维持所述可控硅调光器导通所需的阳极正向电流；当整流后的母线电压小于光源模块的导通压降时，所述第一电解电容器向所述光源模块供电。
其中，所述手机屏幕光源模块具体包括：第一LED灯串和第二LED恒流控制器处理模块，其中所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，所述第二LED恒流控制器一端与所述第一LED灯串的阴极相连，另一端接地，所述第二LED恒流控制器的控制端B通过所述第四采样电阻接地。
其中，所述手机屏幕光源模块具体包括：第一LED灯串、第二LED灯串、第三LED灯串以及第二LED恒流控制器处理模块，其中所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，所述第二LED恒流控制器的控制端B与所述第一LED灯串的阴极相连，控制端D与所述第二LED灯串的阴极相连，控制端E与所述第三LED灯串的阴极相连，所述第二LED恒流控制器的控制端F接地，所述第二LED恒流控制器的控制端H通过所述第四采样电阻接地。
其中，所述整流处理模块为整流桥堆。
相应地，本发明实施例提供的一种手机屏幕亮度控制装置，其包括：
手机屏幕光源模块，用于提供手机屏幕光源；
与所述手机屏幕光源模块相连的整流处理模块，用于对输入电源进行整流；
与所述整流处理模块相连的可控硅调光器，用于调节所述手机屏幕光源的亮度；
与所述整流处理模块和所述手机屏幕光源模块相连的第一电解电容器处理模块，用于当整流后的母线电压小于手机屏幕光源模块的导通压降时，向所述LED光源模块供电；
与所述整流处理模块和所述第一电解电容器处理模块相连的第一LED恒流控制器处理模块，用于提供维持所述可控硅调光器导通所需的阳极正向电流。
其中，所述第一电解电容器处理模块具体包括：第一电解电容器、第一整流二极管、第二整流二极管、第二采样电阻、第三采样电阻，其中所述第一整流二极管的阴极连接所述LED光源模块，所述第一整流二极管的阴极同时也连接所述第一电解电容器的正极，所述第一电解电容器的负极通过所述第二采样电阻和所述第三采样电阻接地，所述第一电解电容器的负极同时也连接所述第二整流二极管的阴极，所述第二整流二极管的阳极接地。
其中，所述手机屏幕光源模块具体包括：第一LED灯串和第二LED恒流控制器处理模块，所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器一端与所述第一LED灯串的阴极相连，另一端接地，另外，所述第二LED恒流控制器的控制端B通过第四采样电阻接地。
其中，所述手机屏幕光源模块具体包括：第一LED灯串、第二LED灯串、第三LED灯串以及第二LED恒流控制器处理模块，所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器的控制端B与所述第一LED灯串的阴极相连，控制端D与所述第二LED灯串的阴极相连，控制端E与所述第三LED灯串的阴极相连，另外，所述第二LED恒流控制器的控制端F接地，所述第二LED恒流控制器的控制端H通过所 述第四采样电阻接地。
其中，所述整流处理模块为整流桥堆。
另外，还包括与外接供电电源相连的输入控制开关。
根据本发明实施例的一种手机屏幕亮度控制装置，其包括手机屏幕光源模块，用于提供手机屏幕光源；与所述手机屏幕光源模块相连的整流处理模块，用于对输入电源进行整流；与所述整流处理模块相连的可控硅调光器，用于调节所述手机屏幕光源的亮度；与所述整流处理模块和所述手机屏幕光源模块相连的第一电解电容器处理模块，用于当整流后的母线电压小于手机屏幕光源模块的导通压降时，向所述手机屏幕光源模块供电；与所述整流处理模块和所述第一电解电容器处理模块相连的第一恒流控制器处理模块，用于提供维持所述可控硅调光器导通所需的阳极正向电流，可使可控硅调光器在下一周期启动时，能够快速启动，避免了在开关切换状态下手机屏幕光源出现灯闪的问题，且由于可控硅调光器快速导通提高了电路的有功功率，即其实现电路具有高功率因素值，易于实现调节，而且电路结构简单，所需成本较低，另外，通过第一电解电容器消除通过手机屏幕光源的频闪分量，可避免频闪现象，且加宽了工作输入电压范围，使手机屏幕光源在整流后的母线电压小于手机屏幕光源的导通压降时继续保持工作状态，提高了光效强度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明中记载的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。
图1是根据本发明一种手机屏幕亮度控制装置中整流后带电解电容器的 母线电压波形图；
图2是根据本发明一种手机屏幕亮度控制装置的具体实施例电路结构示意图；
图3是根据本发明一种手机屏幕亮度控制装置的第二实施例的电路结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。
本发明的核心在于手机屏幕亮度控制装置通过手机屏幕光源模块提供手机屏幕光源；与所述手机屏幕光源模块相连的整流处理模块用于对输入电源进行整流；与所述整流处理模块相连的可控硅调光器用于调节所述手机屏幕光源的亮度；与所述整流处理模块和所述手机屏幕光源模块相连的第一电解电容器处理模块用于当整流后的母线电压小于手机屏幕光源模块的导通压降时，向所述手机屏幕光源模块供电；与所述整流处理模块和所述第一电解电容器处理模块相连的第一恒流控制器处理模块用于提供维持所述可控硅调光器导通所需的阳极正向电流。
需要说明的，作为一个具体实施例，上述第一电解电容器处理模块可包括：第一电解电容器、第一整流二极管、第二整流二极管、第二采样电阻、第三采样电阻，其中所述第一整流二极管的阴极连接所述手机屏幕光源模块，例如LED光源模块，所述第一整流二极管的阴极同时也连接所述第一电解电容器的正极，所述第一电解电容器的负极通过所述第二采样电阻和所述第三采样电阻接地， 所述第一电解电容器的负极同时也连接所述第二整流二极管的阴极，所述第二整流二极管的阳极接地。
另外，上述手机屏幕光源例如LED光源模块可采用各种具体实现方式，例如，一个具体实现方式，LED光源模块可包括：第一LED灯串和第二LED恒流控制器处理模块，所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器一端与所述第一LED灯串的阴极相连，另一端接地，另外，所述第二LED恒流控制器的控制端B通过第四采样电阻接地，实际中LED光源模块也采用其他方式，例如，LED光源模块可包括：第一LED灯串、第二LED灯串、第三LED灯串以及第二LED恒流控制器处理模块，所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器的控制端B与所述第一LED灯串的阴极相连，控制端D与所述第二LED灯串的阴极相连，控制端E与所述第三LED灯串的阴极相连，另外，所述第二LED恒流控制器的控制端F接地，所述第二LED恒流控制器的控制端H通过所述第四采样电阻接地，这里不对LED光源模块做具体限定。
综上，根据上述实施例的手机屏幕亮度控制装置，通过与所述整流处理模块和所述手机屏幕光源模块相连的第一电解电容器处理模块，当整流后的母线电压小于手机屏幕光源模块的导通压降时，第一电解电容器处理模块可向所述手机屏幕光源模块供电；另外，通过与所述整流处理模块和所述第一电解电容器处理模块相连的第一LED恒流控制器处理模块，可提供维持所述可控硅调光器导通所需的阳极正向电流，可使可控硅调光器在下一周期启动时，能够快速启动，避免了在开关切换状态下手机屏幕出现闪烁的问题，且由于可控硅调光器快速导通提高了电路的有功功率，即其实现电路具有高功率因素值，易于实现调节，而且电路结构简单，所需成本较低，另外，通过第一电解电容器消除通过手机屏幕光源的频闪分量，可避免频闪现象，且加宽了工作输入电压范围，使手机屏幕光源在整流后的母线电压小于手机屏幕光源的导通压降时继续保持 工作状态，提高了光效强度。
下面以具体的例子进行说明。
参考图1，该图是本发明一种手机屏幕亮度控制装置中整流后有电解电容器的母线电压波形图。
如图示，本实施例中整流后的母线电压波形是非正弦波，具体来说，本实施例中可控硅调光器在t1时刻导通，在t2时刻关断，而在另一个周期的t3时刻，可控硅调光器又重新导通，如此周期循环下去，其中，在t2和t3间隔范围内，可通过电解电容器向手机屏幕例如LED灯提供供电，即t2和t3间隔范围内，手机屏幕例如LED灯可维持点亮，这里不再赘述。
参考图2，其是根据本发明一种手机屏幕亮度控制装置的第一具体实施例电路结构示意图。
本实施例适用线性单段无频闪进行调光的应用方式，具体实现时，通过可控硅调光器控制手机屏幕光源(本实施例为LED灯)负载亮度，作为一个具体实施例，整流处理模块可采用整流桥堆BR1，手机屏幕光源模块可包括第一LED灯串和对所述第一LED灯串进行恒流控制的第一LED恒流控制器处理模块，第一LED恒流控制器处理模块可包括第一LED恒流控制器和第一电阻，所述第二恒流控制器处理模块包括第二恒流控制器和第二电阻，另外，便于输入电源控制，还可包括电源开关，具体的，本实施例的手机屏幕亮度控制装置主要包括：
电源开关S0、可控硅调光器BG1、整流桥堆BR1、整流二极管VD1(即第一整流二极管)和整流二极管VD2(即第二整流二极管)，电解电容器C1(即第一电解电容器)，2个LED恒流控制器：LED恒流控制器1(即第一LED恒流控制器)和LED恒流控制器2(即第二LED恒流控制器)，采样电阻R1、R2、R3、R4(即第一采样电阻、第二采样电阻、第三采样电阻、第四采样电阻)，LED灯串(即第一LED灯串，实际中第一LED灯串例如可包括3个LED灯珠也可以是其他数 量的LED灯珠，这里不做具体限定)，而具体电路中各元件的连接关系如下：
整流桥堆BR1通过电源开关S0和可控硅调光器BG1与外接的供电电源相连，整流桥堆BR1正相输出端连接LED恒流驱动器1的一端及整流二极管VD1的阳极，整流桥堆BR1负相输出端与LED恒流驱动器1另一端相连后接地，同时LED恒流驱动器1的控制端A端通过采样电阻R1及R3接地；整流二极管VD1的阴极连接LED灯串的阳极，同时整流二极管VD1的阴极连接电解电容器C1的正极；所述电解电容器C1的负极通过采样电阻R2与采样电阻R3相连，同时电解电容器C1的负极连接整流二极管VD2的阴极，同时整流二极管VD2的阳极接地；而LED灯串的阴极连接LED恒流控制器2的一端，LED恒流控制器2的控制端B端通过电阻R4接地，同时LED恒流控制器2的另一端也接地。
下面详细说明本实施例的手机屏幕亮度控制装置的工作过程：
当电源开关闭合，在T1周期内，可控硅调光器BG1在t1时刻触发导通，调节可控硅调光器BG1，母线电压Vin持续上升，此时LED恒流控制器1检测控制端A点电压，当A点电压小于C点电压时，LED恒流控制器1关断，同时电解电容器C1通过母线进行充电，随着母线电压Vin的上升，当母线电压Vin>V LED 灯串时(即母线电压大于LED灯串的导通压降)，手机屏幕光源即LED灯串亮，继续调节可控硅调光器BG1，手机屏幕光源即LED灯串逐渐变亮，通过持续调节可控硅调光器BG1，LED灯串亮度增大，在此期间电解电容器C1持续充电；在T1周期内，当母线电压达到最大时，手机屏幕光源即LED灯串的亮度也达到最大，此时电解电容器C1的电量也达到最大；而LED恒流控制器2驱动LED灯串，控制手机屏幕光源即LED灯串电流，此时流经LED灯串的电流为：I LED灯串＝Vth/R4；
需要说明的，在T1周期内，调节可控硅调光器BG1，当母线电压Vin开始慢慢减小时，LED灯串的亮度也随之相应的减小，当母线电压Vin<V LED灯串时(即母线电压小于LED灯串的导通压降)，由电解电容器C1给手机屏幕光源即LED灯串供电，此时形成的负载回路电流流向顺序依次为：电解电容器C1、LED灯 串、LED恒流驱动器2，采样电阻R4以及整流二极管VD2；
另外，当母线电压Vin持续减小时，LED恒流控制器1检测控制端A点电压，当A点电压大于C点电压时，LED恒流控制器1导通，在t2时刻，可控硅调光器触发关断，LED恒流控制器1可提供用于维持可控硅调光器BG1导通所必需的阳极正向电流，电解电容器C1则对LED灯串供电，持续提供LED灯串负载所需的能量，直到下一周期可控硅调光器BG1再次触发导通；在T2周期内，可控硅调光器BG1在t3时刻触发导通，通过调节可控硅调光器BG1，随着母线电压Vin的上升，电解电容器C1通过母线进行充电，同时LED恒流控制器1检测控制端A点电压，当A点电压小于C点电压时，LED恒流控制器1关断，继续调节可控硅调光器BG1，当母线电压Vin>V LED灯串时，LED灯串1亮，此时LED灯串的供电由外接的供电电源进行供电，后续调光控制过程重复上述控制过程，这里不再赘述。
综上，根据本实施例的手机屏幕亮度控制装置，通过与所述整流处理模块和所述LED光源模块相连的第一电解电容器处理模块，当整流后的母线电压小于手机屏幕光源即LED光源模块的导通压降时，第一电解电容器处理模块可向所述手机屏幕光源即LED光源模块供电；另外，通过与所述整流处理模块和所述第一电解电容器处理模块相连的第一LED恒流控制器处理模块，可提供维持所述可控硅调光器导通所需的阳极正向电流，可使可控硅调光器在下一周期启动时，可以快速响应，即可控硅调光器能够快速启动，避免了在开关切换状态下手机屏幕光源闪烁的问题，且由于可控硅调光器快速导通提高了电路的有功功率，即其实现电路具有高功率因素值，易于实现调节，而且电路结构简单，所需成本较低，另外，通过第一电解电容器消除通过手机屏幕光源的频闪分量，可避免频闪现象，且加宽了工作输入电压范围，使手机屏幕光源的LED灯串在整流后的母线电压小于手机屏幕光源即LED光源的导通压降时继续保持工作状态，提高了光效强度，而且由于整流二极管VD2的存在使电解电容器C1在放电 过程中损耗减小，有效的提高了效率。
图3是根据本发明一种手机屏幕亮度控制装置的第二实施例的电路结构示意图。
本实施例适用线性三串LED进行调光的应用方式，作为一个具体实施例，整流处理模块可采用整流桥堆，所述手机屏幕光源模块即LED光源模块可包括：第一LED灯串、第二LED灯串、第三LED灯串以及第二LED恒流控制器处理模块，所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器的控制端B与所述第一LED灯串的阴极相连，控制端D与所述第二LED灯串的阴极相连，控制端E与所述第三LED灯串的阴极相连，另外，所述第二LED恒流控制器的控制端F接地，所述第二LED恒流控制器的控制端H通过所述第四采样电阻接地，另外，便于输入电源控制，还可包括电源开关，而具体的手机屏幕亮度控制装置主要包括：
电源开关S0、可控硅调光器BG1、整流桥堆BR1、整流二极管VD1和VD2、电解电容器C1、2个LED恒流控制器：LED恒流控制器1(即第一LED恒流控制器)和LED恒流控制器2(即第二LED恒流控制器)，采样电阻R1、R2、R3、R4(即第一采样电阻、第二采样电阻、第三采样电阻、第四采样电阻)，三串LED灯串：LED灯串1(即第一LED灯串)、LED灯串2(即第二LED灯串)、LED灯串3(即第三LED灯串)，实际中第一LED灯串、第二LED灯串和所述第三LED灯串的灯珠耐压和灯珠数量相同，例如灯珠数量均为3个或者其他数量，这里不做具体限定，而具体电路中各元件的连接关系如下：
整流桥堆BR1通过电源开关S0和可控硅调光器BG1与外接的供电电源相连，整流桥堆BR1正相输出端连接LED恒流驱动器1的一端及整流二极管VD1的阳极，整流桥堆BR1负相输出端与LED恒流驱动器1另一端相连后接地，所述LED恒流驱动器1的控制端A端通过电阻R1及R3接地；整流二极管VD1的阴极连接LED灯串1的阳极，同时整流二极管VD1的阴极连接电解电容器C1的正极； 电解电容器C1的负极通过电阻R2与电阻R3相连，同时电解电容器C1的负极连接整流二极管VD2的阴极，整流二极管VD2的阳极接地；LED灯串1的阴极连接LED恒流控制器2的控制端B端，同时LED灯串1的阴极连接LED灯串2的阳极，LED灯串2的阴极连接LED恒流控制器2的控制端D端,同时LED灯串2的阴极连接LED灯串3的阳极，LED灯串3的阴极连接LED恒流控制器2的控制端E端，LED恒流控制器2的控制端H端通过电阻R4接地，同时LED恒流控制器2的控制端F端也接地。
下面详细说明本实施例的手机屏幕亮度控制装置的工作过程：
当电源开关闭合，在T1周期内，可控硅调光器BG1在t1时刻触发导通，调节可控硅调光器BG1，母线电压Vin持续上升，此时LED恒流控制器1检测控制端A点电压，当A点电压小于C点电压时，LED恒流控制器1关断，同时电解电容器C1通过母线进行充电，随着母线电压Vin的上升，当母线电压Vin>V LED 灯串1时(即母线电压大于LED灯串1的导通压降)，LED灯串1亮，继续调节可控硅调光器BG1，母线电压Vin上升，LED灯串1逐渐变亮，当母线电压Vin>V LED 灯串1+V LED灯串2时(即母线电压大于LED灯串1和LED灯串2的导通压降之和)，LED灯串2亮，继续调节可控硅调光器BG1，LED灯串1及LED灯串2变亮，当母线电压Vin>V LED灯串1+V LED灯串2+V LED灯串3时(即母线电压大于LED灯串1、LED灯串2和LED灯串3的导通压降之和)，LED灯串3亮，继续调节可控硅调光器BG1，LED灯串1、LED灯串2及LED灯串3亮度增大，在T1周期内，当母线电压达到最大时，三段LED灯串的亮度也达到最大，此时电解电容器C1的电量也达到最大；LED恒流控制器2驱动LED灯串，控制LED灯串电流，此时流经三段LED灯串的电流分别为：I LED灯串1＝Vth1/R4，I LED灯串2＝Vth2/R4，I LED灯串3＝Vth3/R4；
需要说明的，在T1周期内，调节可控硅调光器BG1，当母线电压Vin开始慢慢减小时，LED灯串的亮度也相应的减小，当母线电压V LED灯串1+V LED灯串2<Vin<V LED 灯串1+V LED灯串2+V LED灯串3时(即母线电压大于LED灯串1和LED灯串2的导通压降之后，但小于LED灯串1、LED灯串2和LED灯串3的导通压降之和)，可由电解 电容器C1给三段LED灯串供电；
随着电解电容器C1电量的消耗，当电解电容器C1两端的电压V LED灯串1+V LED灯 串2<V C1<V LED灯串1+V LED灯串2+V LED灯串3时(即电解电容器C1两端电压大于LED灯串1和LED灯串2的导通压降之后，但小于LED灯串1、LED灯串2和LED灯串3的导通压降之和)，LED灯串3灭，电解电容器C1两端的电压继续降低，当电解电容器C1两端的电压V LED灯串1<V C1<V LED灯串1+V LED灯串2时((即电解电容器C1两端电压大于LED灯串1的导通压降，但小于LED灯串1、LED灯串2的导通压降之和))，LED灯串2灭，电解电容器C1持续给LED灯串1供电，直到下个周期可控硅调光器BG1再次触发；
需要说明的，当母线电压慢慢减小时，LED恒流控制器1检测控制端A点电压，当A点电压大于C点电压时，LED恒流控制器1导通，在t2时刻，可控硅调光器BG1触发关断，LED恒流控制器1提供用于维持可控硅调光器BG1导通所必需的阳极正向电流，电解电容器C1持续提供LED负载所需的能量，直到下一周期可控硅调光器BG1再次触发导通；在T2周期内，可控硅调光器BG1在t3时刻触发导通，调节可控硅调光器BG1，随着母线电压Vin的上升，电解电容器C1通过母线进行充电，同时LED恒流控制器1检测控制端A点电压，当A点电压小于C点电压时，LED恒流控制器1关断，继续调节可控硅调光器，当母线电压Vin>V LED灯串1时(即母线电压大于LED灯串1的导通压降)，LED灯串1亮，此时LED灯串1由供电电源进行供电，后续控制过程重复上述控制过程，这里不再赘述。
综上，本实施例的手机屏幕亮度控制装置，通过LED恒流驱动器2驱动多段LED灯串(例如本实施例的三段LED灯串)，可适用线性三串调光LED驱动电路，而且通过LED恒流驱动器1提供用于维持可控硅调光器导通所必需的阳极正向电流，使可控硅调光器在下一周期启动时，能够快速启动，避免了在开关切换状态下LED灯出现灯闪的问题，且由于可控硅调光器快速导通提高了电路的有功功率，即其实现电路具有高功率因素值，易于实现调节，而且电路结构 简单，所需成本较低，另外，通过第一电解电容器消除通过LED光源的频闪分量，可避免频闪现象，且加宽了工作输入电压范围，使LED灯串在整流后的母线电压小于LED光源的导通压降时继续保持工作状态，提高了光效强度，而且由于整流二极管VD2的存在使电解电容器C1在放电过程中损耗减小，有效的提高了效率。
在上述所提供的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
类似地，应当理解，为了精简本公开并帮助理解各个发明方面中的一个或多个，在上面对本发明的示例性实施例的描述中，本发明的各个特征有时被一起分组到单个实施例、图、或者对其的描述中。然而，并不应将该公开的方法解释成反映如下意图：即所要求保护的本发明要求比在每个权利要求中所明确记载的特征更多的特征。更确切地说，如下面的权利要求书所反映的那样，发明方面在于少于前面公开的单个实施例的所有特征。因此，遵循具体实施方式的权利要求书由此明确地并入该具体实施方式，其中每个权利要求本身都作为本发明的单独实施例。
应该注意的是上述实施例对本发明进行说明而不是对本发明进行限制，并且本领域技术人员在不脱离所附权利要求的范围的情况下可设计出替换实施例。

Claims (10)

  1. 一种手机屏幕亮度控制装置，其特征在于，包括：
    手机屏幕光源模块、整流处理模块、可控硅调光器、第一恒流控制器、第一电解电容器、第一整流二极管、第二整流二极管、第一采样电阻、第二采样电阻及第三采样电阻；
    所述整流处理模块通过所述可控硅调控器与外接电源相连，所述整流处理模块的正相输出端连接所述第一恒流控制器的一端及所述第一整流二极管的阳极，所述整流处理模块的负相输出端与所述第一恒流控制器的另一端相连后接地，所述第一恒流控制器的控制端A通过第一采样电阻和第三采样电阻接地，所述第一采样电阻和所述第三采样电阻通过C点相连，所述第一整流二极管的阴极连接所述手机屏幕光源模块，所述第一整流二极管的阴极同时也连接所述第一电解电容器的正极，所述第一电解电容器的负极通过所述第二采样电阻和所述第三采样电阻接地，所述第一电解电容器的负极同时也连接所述第二整流二极管的阴极，所述第二整流二极管的阳极接地；
    其中当所述第一恒流控制器控制端A点电压大于C点电压时，所述第一恒流控制器导通以提供维持所述可控硅调光器导通所需的阳极正向电流；当整流后的母线电压小于光源模块的导通压降时，所述第一电解电容器向所述光源模块供电。
  2. 根据权利要求1所述的手机屏幕亮度控制装置，其特征在于，所述手机屏幕光源模块具体包括：第一LED灯串和第二LED恒流控制器处理模块，其中所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，所述第二LED恒流控制器一端与所述第一LED灯串的阴极相连，另一端接地，所述第二LED恒流控制器的控制端B通过所述第四采样电阻接地。
  3. 根据权利要求1所述的手机屏幕亮度控制装置，其特征在于，所述手机屏幕光源模块具体包括：第一LED灯串、第二LED灯串、第三LED灯串以及 第二LED恒流控制器处理模块，其中所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，所述第二LED恒流控制器的控制端B与所述第一LED灯串的阴极相连，控制端D与所述第二LED灯串的阴极相连，控制端E与所述第三LED灯串的阴极相连，所述第二LED恒流控制器的控制端F接地，所述第二LED恒流控制器的控制端H通过所述第四采样电阻接地。
  4. 根据权利要求1-3任一项所述的手机屏幕亮度控制装置，其特征在于，所述整流处理模块为整流桥堆。
  5. 一种手机屏幕亮度控制装置，其特征在于，包括：
    手机屏幕光源模块，用于提供手机屏幕光源；
    与所述手机屏幕光源模块相连的整流处理模块，用于对输入电源进行整流；
    与所述整流处理模块相连的可控硅调光器，用于调节所述手机屏幕光源的亮度；
    与所述整流处理模块和所述手机屏幕光源模块相连的第一电解电容器处理模块，用于当整流后的母线电压小于手机屏幕光源模块的导通压降时，向所述LED光源模块供电；
    与所述整流处理模块和所述第一电解电容器处理模块相连的第一LED恒流控制器处理模块，用于提供维持所述可控硅调光器导通所需的阳极正向电流。
  6. 根据权利要求5所述的装置，其特征在于，所述第一电解电容器处理模块具体包括：第一电解电容器、第一整流二极管、第二整流二极管、第二采样电阻、第三采样电阻，其中所述第一整流二极管的阴极连接所述LED光源模块，所述第一整流二极管的阴极同时也连接所述第一电解电容器的正极，所述第一电解电容器的负极通过所述第二采样电阻和所述第三采样电阻接地，所述第一电解电容器的负极同时也连接所述第二整流二极管的阴极，所述第二整流二极管的阳极接地。
  7. 根据权利要求5所述的装置，其特征在于，所述手机屏幕光源模块具体包括：第一LED灯串和第二LED恒流控制器处理模块，所述第二LED恒流控 制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器一端与所述第一LED灯串的阴极相连，另一端接地，另外，所述第二LED恒流控制器的控制端B通过第四采样电阻接地。
  8. 根据权利要求5所述的装置，其特征在于，所述手机屏幕光源模块具体包括：第一LED灯串、第二LED灯串、第三LED灯串以及第二LED恒流控制器处理模块，所述第二LED恒流控制器处理模块包括第二LED恒流控制器和第四采样电阻，其中所述第二LED恒流控制器的控制端B与所述第一LED灯串的阴极相连，控制端D与所述第二LED灯串的阴极相连，控制端E与所述第三LED灯串的阴极相连，另外，所述第二LED恒流控制器的控制端F接地，所述第二LED恒流控制器的控制端H通过所述第四采样电阻接地。
  9. 根据权利要求5-8任一项所述的装置，其特征在于，所述整流处理模块为整流桥堆。
  10. 根据权利要求5所述的装置，其特征在于，还包括与外接供电电源相连的输入控制开关。
PCT/CN2017/119095 2016-12-30 2017-12-27 一种手机屏幕亮度控制装置 WO2018121620A1 (zh)

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CN205726501U (zh) * 2016-02-06 2016-11-23 陕西亚成微电子股份有限公司 一种led灯调光控制电路
CN106231724A (zh) * 2016-08-02 2016-12-14 陕西亚成微电子股份有限公司 一种led无频闪调光控制电路

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