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DC-DC conveter and organic light emitting display using the same

A converter and comparator technology, applied in the field of organic light-emitting displays, can solve the problems of increasing power loss in large capacity, changing to high level or low level, etc.

Active Publication Date: 2009-03-18
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the comparator described above, the output voltage is determined according to the difference between the reference voltage (Vref) and the input voltage (Vin) in the first capacitor (C1), so the problem with this comparator is: If there is a large difference between the reference voltage (Vref) and the input voltage (Vin), it will take more time to convert the output voltage Change to high or low level
[0012] In order to solve the problem, the comparator as mentioned above should have a large capacity, however, there is a problem that the power loss is increased due to the large capacity

Method used

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  • DC-DC conveter and organic light emitting display using the same
  • DC-DC conveter and organic light emitting display using the same
  • DC-DC conveter and organic light emitting display using the same

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Embodiment Construction

[0025] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0026] image 3 is a schematic diagram showing the structure of an organic light emitting display according to the present invention. refer to image 3 , the organic light emitting display has a pixel unit 100 , a data driving unit 200 , a scanning driving unit 300 and a DC-DC converter 400 .

[0027] In the pixel unit 100, a plurality of data lines (D1 to Dm) and a plurality of scan lines (S1 to Sn) intersect with each other, and a pixel is formed near the intersecting area of ​​the data lines (D1 to Dm) and the scan lines (S1 to Sn). 110. The pixels 110 represent images by displaying gray levels corresponding to data signals transmitted through the data lines (D1 to Dm) and scan signals transmitted through the scan lines (S1 to Sn).

[0028] The data driving unit 200 is connected to a plurality of data lines (D1 to Dm) to transmit data signals to a plurality of parallel data ...

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Abstract

A DC-DC converter with an improved signal response characteristic and reduced power consumption; and an organic light-emitting display using the same are disclosed. A comparator for receiving an input voltage and a reference voltage and determining an output to correspond to a difference between the input voltage and the reference voltage is disclosed. The comparator uses a feedback mechanism to improve speed without increased power consumption.

Description

technical field [0001] The present invention relates to a DC-DC converter and an organic light emitting display using the same, and more particularly to a DC-DC converter configured to output a voltage according to a comparison result obtained by comparing an input voltage with a reference voltage; and using the same organic light-emitting display. Background technique [0002] figure 1 is a circuit diagram showing a comparator according to the prior art. refer to figure 1 , the comparator includes an input unit and first, second and third inverters. [0003] The input unit has a first switch (SW1) for switching an input voltage (Vin); and a second switch (SW2) for switching a reference voltage (Vref). [0004] The first inverter has a first transistor (M1) as a P MOS transistor and a second transistor (M2) as an N MOS transistor. And the first power supply (Vdd) is connected to the source of the first transistor (M1) to output a high level voltage, and the second trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10H02M3/155H02M3/156G05B1/02G09G3/00G09G3/20
CPCH02M3/07H02M2001/0022H02M1/0022
Inventor 申东蓉
Owner SAMSUNG DISPLAY CO LTD