CN110782826B - 一种驱动器ic低功耗控制电路 - Google Patents

一种驱动器ic低功耗控制电路 Download PDF

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CN110782826B
CN110782826B CN201911078304.9A CN201911078304A CN110782826B CN 110782826 B CN110782826 B CN 110782826B CN 201911078304 A CN201911078304 A CN 201911078304A CN 110782826 B CN110782826 B CN 110782826B
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mipi
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郑丞弼
施伟
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Shenghe Microelectronics Zhaoqing Co ltd
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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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

本发明公开了一种驱动器IC低功耗控制电路。它包括AMP驱动电路、向AMP驱动电路提供参考输入电压的BGR电路以及AMP驱动电路输出端的MIPI模块和数字驱动电压模块,BGR电路的输出端与AMP驱动电路的输出端之间设置有SW开关电路,所述SW开关电路能够在ULPS模式下将MIPI模块和数字驱动电压模块与AMP驱动电路之间进行切断。其优点在于:在进入ULPS模式时,只有BGR电路可以工作,因此,它可以最小化驱动器IC的静态电流消耗,从而进一步降低了UPLS模式进入期间的功耗。

Description

一种驱动器IC低功耗控制电路
技术领域
本发明涉及一种显示驱动器IC的驱动电路,具体的说是一种驱动器IC低功耗控制电路,属于移动设备显示处理技术领域。
背景技术
在移动设备内部的驱动芯片使用mip i rx实现mip i接口时序,诸如手表和可穿戴设备,该类型设备中,LV(低压)中使用的数字和MIPI设备实际上是相同功率,例如,TSMC40nm LV设备的激励电压为1.1V,数字和MIPI功率为1.1V,为了产生[VDD(用于数字)和VDD_MIPI(用于MIPI)],基本上需要操作三个块,产生AMP操作的参考输入电压(INP)的BGR,生成AMP行为所需的电流(IBIAS 1&2)的BIAS,根据设计,BIAS块可以由BGR构成,并且可能不是必需的,通过产生最终[VDD和VDD MIPI来驱动[数字和MIPI块]的AMP驱动电路,ULPS(Ultra Low Power State,超低功耗状态)是一种用于在ULPS启动时MIPI的电流最小化以及最小化MIPI RX(例如:显示设备)的数字和模拟行为的模式,虽然要进入[ULPS模式],但是上述三个块应该不断地变化,即使进入ULPS,AMP和BGR仍可产生MIPI和数字驱动电压,也很难降低块中的消耗电流,因此如何在进入ULPS后进一步降低消耗电流成为一个长期以来需要进一步克服的技术难题。
发明内容
本发明要解决的技术问题是提供一种能够最大程度降低ULPS模式下消耗电流的驱动器IC低功耗控制电路。
为了解决上述技术问题,本发明的驱动器IC低功耗控制电路,包括AMP驱动电路、向AMP驱动电路提供参考输入电压的BGR电路以及AMP驱动电路输出端的MIPI模块和数字驱动电压模块,BGR电路的输出端与AMP驱动电路的输出端之间设置有SW开关电路,SW开关电路能够在ULPS模式下将MIPI模块和数字驱动电压模块与AMP驱动电路之间进行切断。
所述AMP驱动电路的输入端还连接有向AMP驱动电路提供偏置电流的BIAS电路。
所述BGR电路和BIAS电路连接同一个AMP驱动电路
所述BGR电路和BIAS电路连接两个并联设置的AMP驱动电路。
所述SW开关电路并联在两个AMP驱动电路的输出端。
本发明的优点在于:在ULPS模式下,BGR电路产生参考电压,并且通过SW开关电路被应用于MIPI模块和数字驱动电压模块I,没有必要驱动时可以通过SW开关电路进行关闭,也可以关闭产生AMP驱动所需偏置电流的BIAS块,如果BGR电路产生大电压作为参考电压,则小电压可以轻松通过电阻线产生,因此即使现有BGR电路中的产生电压增加,与关闭AMP的电流量相比,增加的电流也很少或非常小,由此在进入ULPS模式时,只有BGR电路可以工作,因此,它可以最小化驱动器IC的静态电流消耗,从而进一步降低了ULPS模式进入期间的功耗。
附图说明
图1为本发明驱动器IC低功耗控制电路的电路原理图;
图2为本发明驱动器IC低功耗控制电路的时序图。
具体实施方式
下面结合附图和具体实施方式,对本发明的驱动器IC低功耗控制电路作进一步详细说明。
实施例一:
如图1所示,本实施例的驱动器IC低功耗控制电路,包括1#AMP驱动电路、2#AMP驱动电路、BGR电路、BIAS电路以及MIPI模块和数字驱动电压模块,BGR电路的INP2管脚同时连接1#AMP驱动电路和2#AMP驱动电路的输入端,BIAS电路的IBIAS 1管脚连接1#AMP驱动电路的输入端,BIAS电路的IBIAS2管脚连接2#AMP驱动电路的输入端,数字驱动电压模块连接在1#AMP驱动电路的输出端,MIPI模块连接在2#AMP驱动电路的输出端,图中,VDD表示数字电源,VDD MIPI指代MIPI的功率,BGR电路的INP1管脚连接在一个SW开关电路的输入端上,SW开关电路的输出端同时连接在1#AMP驱动电路和2#AMP驱动电路的输出端上,通过BGR电路可以向AMP驱动电路提供参考输入电压,通过BIAS电路可以向AMP驱动电路提供偏置电流,SW开关电路能够在ULPS模式下将MIPI模块和数字驱动电压模块与1#AMP驱动电路和2#AMP驱动电路之间进行切断。
如图2所示,在ULPS模式下,驱动器IC的数字和MIPI消耗的电流基本较低,因为所有MIPI通道都保持为LP00,而不从主机向驱动器IC发送任何显示数据和命令;在这种情况下,根据ULPS模式下的时序图,BGR如图1所示产生[VDD(=VDD_MIPI)=INP1],并且INP1通过SW开关电路被应用于MIPI模块和数字驱动电压模块,没有必要驱动[VDD&VDD__MIPIAMP](可以关闭),也可以关闭产生AMP驱动所需偏置电流的BIAS块,如果BGR电路在INP1和INP2之间产生大电压作为参考电压,则小电压可以轻松通过电阻线产生,因此即使现有BGR电路中的产生电压增加,与关闭AMP的电流量相比,增加的电流也很少或非常小,由此,当进入ULPS模式时,没有驱动AMP驱动电路和Bi as块(BIAS电路)行为,块(只有BGR电路)可以工作,因此,它可以最小化驱动器IC的静态电流消耗。
实施例二:
本实施例的驱动器IC低功耗控制电路,包括AMP驱动电路(运放驱动电路)、BGR电路(带隙基准电路)、BIAS电路(偏置电路)以及MIPI模块和数字驱动电压模块,BGR电路的INP2管脚连接AMP驱动电路的输入端,BIAS电路的IBIAS 1管脚连接AMP驱动电路的输入端,驱动电路的输出端分别连接数字驱动电压模块和MIPI模块,BGR电路的INP1管脚连接在一个SW开关电路的输入端上,SW开关电路的输出端连接在AMP驱动电路的输出端上,通过BGR电路可以向AMP驱动电路提供参考输入电压,通过BIAS电路可以向AMP驱动电路提供偏置电流,SW开关电路能够在ULPS模式下将MIPI模块和数字驱动电压模块与AMP驱动电路之间进行切断。
其试验数据如下表所示:
Figure GDA0004058828640000031
通过表格可以看出,如果IC进入ULPS模式,ULPS_EN='H,ULPS_ENB='L'-->所以SW1进入'开启',最后INP 1=VDD=VDD_MIPI,AMP1(针对VDD),AMP2(针对VDD_MIPI),BIAS_Block关闭,因此,驱动IC的静态电流在ULPS模式下可降低(或最小化)。

Claims (5)

1.一种驱动器IC低功耗控制电路,包括AMP驱动电路、向AMP驱动电路提供参考输入电压的BGR电路以及AMP驱动电路输出端的MIPI模块和数字驱动电压模块,其特征在于:所述BGR电路的输出端与AMP驱动电路的输出端之间设置有SW开关电路,BGR电路的INP1管脚连接在一个SW开关电路的输入端上,SW开关电路的输出端连接在AMP驱动电路的输出端上,所述SW开关电路能够在ULPS模式下将MIPI模块和数字驱动电压模块与AMP驱动电路之间进行切断。
2.按照权利要求1所述的驱动器IC低功耗控制电路,其特征在于:所述AMP驱动电路的输入端还连接有向AMP驱动电路提供偏置电流的BIAS电路。
3.按照权利要求1或2所述的驱动器IC低功耗控制电路,其特征在于:所述BGR电路和BIAS电路连接同一个AMP驱动电路。
4.按照权利要求1或2所述的驱动器IC低功耗控制电路,其特征在于:所述BGR电路和BIAS电路连接两个并联设置的AMP驱动电路。
5.按照权利要求3所述的驱动器IC低功耗控制电路,其特征在于:所述SW开关电路并联在两个AMP驱动电路的输出端。
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