Power Supplying Apparatus And Display Apparatus Including The Same

A technology for power supply equipment and display equipment, which is applied to protection, electrical components, and circuit devices that respond to undervoltage or no voltage, and can solve problems such as increased input current and increased size of integrated circuit IC chips.

Active Publication Date: 2014-07-09
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, if the reference undervoltage detection voltage Vref_UVLO used for the undervoltage lockout function is lowered to increase the voltage range of the input power Vin, the input current increases as the input power Vin decreases
Therefore, if image 3 As shown, since the input current of each of the switching element Psw, the inductor L, and the diode D increases according to the change of the input power Vin, there arises a problem that the chip size of the integrated circuit IC increases, and it should be increased Rated current of each of switching element Psw, inductor L and diode

Method used

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  • Power Supplying Apparatus And Display Apparatus Including The Same
  • Power Supplying Apparatus And Display Apparatus Including The Same
  • Power Supplying Apparatus And Display Apparatus Including The Same

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Embodiment Construction

[0033] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0034] The technology disclosed in the specification should be understood as follows.

[0035] The singular used in the specification includes the plural unless the meaning is different in the context. The words "first" and "second" are intended to distinguish one element from another, and it should be understood that the protection scope of the present invention should not be limited by these words.

[0036] In addition, it should be understood that the words "comprising" and "having" are intended not to exclude the existence and optional possibility of one or more features, quantities, steps, operations, elements or combinations thereof.

[0037] It should be understood that the wording "at least o...

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PUM

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Abstract

The invention discloses a power supplying apparatus and a display apparatus including the same. The power supplying apparatus is disclosed, in which an under voltage lock out function is not performed for instantaneous voltage dip even in case that a reference under voltage detection voltage is set at high level. The power supplying apparatus comprises an under voltage detector generating an under voltage lock out signal by detecting voltage dip of an input power and performing an under voltage protection function, wherein the under voltage detector delays the input power for a delay time, which is set, to generate the under voltage lock out signal.

Description

technical field [0001] The present invention relates to a power supply device and a display device including the power supply device. Background technique [0002] Generally, power supply equipment rectifies AC voltage and converts AC voltage to DC voltage, or supplies DC voltage required by various devices such as display devices and light emitting diodes by boosting or stepping down AC voltage to DC voltage. [0003] figure 1 is a diagram illustrating a conventional power supply device. [0004] see figure 1 , the prior art power supply equipment includes a DC-DC converter 10 , an undervoltage (under voltage) detector 20 and a switch controller 30 . [0005] The DC-DC converter 10 converts the input power Vin into a DC voltage and outputs the converted voltage. The DC-DC converter 10 includes an inductor L, a diode D, a switching element Psw, and a capacitor C. Based on the pulse width modulation signal SPWA supplied from the switch controller 30, the DC-DC converter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155G09G3/20
CPCH02H1/04H02H3/24H02H7/125G09G3/20G09G3/3406G09G3/3696G09G2300/0408G09G2300/0426G09G2310/0259G09G2320/0673G09G2330/028H02M1/32H02H7/1213G09G5/10
Inventor 张燻
Owner LG DISPLAY CO LTD
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