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An LED driver and a display device using the LED driver

A technology of LED driver and display device, applied in the field of LED driver and display device using the LED driver, can solve serious problems such as serious EMI noise, FPDEMI radiation and conduction problems, etc.

Inactive Publication Date: 2016-03-09
SOLUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the larger the size of the FPD, the longer the length of each channel, and the channel can act as an antenna that can emit EMI noise, which makes the EMI noise problem more serious
Moreover, although there is a back cover to weaken EMI noise, due to intensified price competition, in order to save costs, the use of the back cover is reduced to a minimum or even not used, resulting in severe EMI radiation and conduction problems in the FPD

Method used

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  • An LED driver and a display device using the LED driver
  • An LED driver and a display device using the LED driver
  • An LED driver and a display device using the LED driver

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Embodiment Construction

[0019] By referring to the detailed description of the accompanying drawings showing preferred embodiments of the present invention, issues regarding operational effects including techniques according to the purpose of the LED driver of the present invention and a display device using the same will be clearly understood configuration.

[0020] In addition, when describing the present invention, descriptions of known technologies are omitted so as not to unnecessarily obscure the embodiments of the present invention. In this specification, terms such as 'first' and 'second' are used to distinguish one element from another element, and these elements are not limited by the above terms.

[0021] In the following detailed description of the invention, reference is made to the accompanying drawings which show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments will be described in sufficient detail to enable those skilled in the...

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Abstract

The invention provides an LED driver and the display device using the LED driver. The LED driver comprises a power supply unit providing a drive current for a channel and a capacitor having a first electrode and a second electrode. The channel comprises a plurality of LEDs which are in series connection or parallel connection. The first electrode is connected to an output terminal of the power supply unit and the channel. The second electrode is grounded.

Description

[0001] This application claims the benefit of foreign priority from Korean Patent Application No. 10-2014-0110685 filed on Aug. 25, 2014, the entire contents of which are hereby incorporated by reference. technical field [0002] Embodiments of the present invention relate to an LED driver and a display device using the LED driver. Background technique [0003] In general, electronic devices such as mobile phones, FPDs (Flat Panel Displays), etc. often generate EMI (Electromagnetic Interference) noise problems due to the trend towards miniaturization and high speed. Moreover, due to the high frequency of the switching frequency and the simplification of the EMI filter, the original severe price competition becomes more serious. Specifically, taking PFD as an example, since PFC (Power Factor Correction), DC-DC converter and LED driver are connected in series, EMI noise is generated in different frequency bandwidths. [0004] Also, in the case of using LEDs as the FPD backlig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCG09G3/3406
Inventor 金熙胜元载善柳承完丁炯圭
Owner SOLUM CO LTD