KR101591759B1 - Apparatus for controlling High-efficiencyOLED - Google Patents

Apparatus for controlling High-efficiencyOLED Download PDF

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Publication number
KR101591759B1
KR101591759B1 KR1020150124191A KR20150124191A KR101591759B1 KR 101591759 B1 KR101591759 B1 KR 101591759B1 KR 1020150124191 A KR1020150124191 A KR 1020150124191A KR 20150124191 A KR20150124191 A KR 20150124191A KR 101591759 B1 KR101591759 B1 KR 101591759B1
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KR
South Korea
Prior art keywords
oled
unit
noise
power supply
smoothing
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KR1020150124191A
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Korean (ko)
Inventor
오승철
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주식회사 해찬
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Priority to KR1020150124191A priority Critical patent/KR101591759B1/en
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Publication of KR101591759B1 publication Critical patent/KR101591759B1/en

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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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The present invention relates to a high efficiency OLED control device for preventing electromagnetic noise and noise generated during driving of an OLED through noise elimination at a power supply end and smoothing and filtering, A control unit for outputting an OLED control signal in response to an input of the touch input unit, a control unit for receiving a control signal from the power unit, An OLED driver unit which is driven by the converted power source and whose driving state is controlled in accordance with a control signal of the control unit to remove noise and filter the OLED output; And an OLED output unit for performing an output operation according to driving of the OLED driver unit.

Description

[0001] Apparatus for controlling High-efficiency OLED [0002]

The present invention relates to a high efficiency OLED control device, and more particularly, to a high efficiency OLED control device for blocking electromagnetic waves and noise generated when an organic light emitting diode (OLED) is driven and stabilizing the system and operating the device with high efficiency.

OLED is a display made by using self-luminous phenomenon that emits light when current flows in a fluorescent organic compound. The image quality reaction speed is 1,000 times faster than that of an ultra-thin liquid crystal display (TFT-LCD) Next-generation flat-panel display.

Flat panel display (FPD) technology is largely divided into light-receiving type that operates with external light and light-emitting type that emits light itself. TFT-LCD, which is most commonly used today, is the most typical light- OLEDs use three organic phosphor compounds, red, green and blue, which have self-luminous functions. The organic light emitting diodes (LEDs) emit light from the cathode and the anode (Electrons) and positively charged particles combine in an organic material and emit light by themselves. Therefore, there is no need for a backlight (backlight device) that lowers color.

An OLED is divided into a passive matrix (PM) constituting pixels by simple crossing to an anode and a cathode according to a driving method, and an active matrix (AM) in which a switching TFT is arranged in each pixel. OLEDs can be driven at a low voltage of 15V or less, and TFT-LCDs are emerging as next-generation flat panel displays with PDPs because of their ability to design ultra-thin products.

OLEDs have faster data response times than TFT-LCDs and are 10 times wider than TFT-LCDs with a viewing angle of 170 degrees, so you can enjoy the same picture quality in either direction. It also has the advantage of lowering the production cost by more than 30% theoretically, and the power consumption of the next-generation flat panel display is much lower than that of TFT-LCD or PDP.

However, in the conventional OLED, a plurality of resistance elements are used to control the brightness of the LED by the ON / OFF power application method, and electromagnetic waves and noise are generated, resulting in low efficiency and harmful effects on the human body.

Korean Registered Patent No. 10-0876250 (registered on December 19, 2008)

SUMMARY OF THE INVENTION The present invention has been made in order to overcome the above problems of the prior art, and it is an object of the present invention to provide a high-efficiency OLED control for eliminating electromagnetic noise and noise generated at the time of driving an OLED through smoothing and filtering operations, The purpose is to provide a device.

According to an aspect of the present invention, there is provided a power supply unit comprising: a power supply unit for receiving and converting AC power into DC power, An OLED driver unit driven by a power source converted by the power unit and controlled to be driven according to a control signal of the control unit to remove noise and filter the noise of the OLED output; And an OLED output unit for performing an output operation according to driving of the OLED driver unit.

The power unit includes: a smoothing coil connected in series to a power terminal for smoothing and smoothing noise included in the power source; a VCC resistor connected in series to the power terminal and connected in parallel with the smoothing coil, ; And a GND resistor connected in series to the power terminal and connected in parallel with the smoothing coil, the other terminal being connected to the ground to filter the noise of the power terminal.

The OLED driver unit includes: an OLED output coil connected in series to the OLED output unit for blocking and smoothing the noise included in the power supply; a capacitor connected in parallel with the OLED output coil, OLED + resistors; And an OLED-resistor connected in parallel with the OLED + resistor and connected to the negative terminal of the OLED element to filter noise.

According to the high-efficiency OLED control apparatus of the present invention configured as described above, noise is removed at the power supply end, and smoothing and filtering operations are performed to cut off electromagnetic waves and noise generated when the OLED is driven, .

1 is a block diagram showing an embodiment of a high-efficiency OLED control apparatus according to the present invention;
FIG. 2 is a detailed block diagram of the power supply unit of FIG. 1,
FIG. 3 is a detailed block diagram of the OLED driver unit of FIG. 1,
4A and 4B are graphs showing noise level test results according to the operation of the power supply unit of the present invention shown in FIG. 2,
5A to 5C are graphs illustrating noise level test results according to the operation of the OLED driver unit of the present invention shown in FIG.

The present invention may have various modifications and various embodiments, and specific embodiments thereof will be described in detail with reference to the detailed description and examples of the drawings. In the following description of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the present invention may be blurred.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an embodiment of a high efficiency OLED control apparatus according to the present invention.

As shown, the high efficiency OLED control device according to the present invention includes a power unit 10, a control unit 20, a touch input unit 30, an OLED driver unit 40, and an OLED output unit 50.

The power supply unit 10 receives the AC power and converts it into a DC power. In addition, the noise of the input power source is cut off and smoothed.

To this end, the power supply unit 10 is a device for supplying electric energy to operate an ordinary device or equipment, and may use a power supply system (power supply system).

The touch input unit 30 inputs a user's operation signal in the form of a touch pad or a key input. A touch pad is a device for indicating a screen on a computer or an electronic device, and is an input device that replaces a mouse with a small flat plate with a pressure sensor. When a finger or a pen is used for contact, the cursor is moved by the pressure, and the positional information is recognized.

The control unit 20 outputs an OLED control signal according to an input of the touch input unit 30. [

For this purpose, the control unit 20 may be a conventional microcomputer, a CPU, an MPU, or the like having functions such as calculation and judgment.

The OLED driver unit 40 is driven by a power source converted from the power supply unit 10 and its driving state is controlled according to a control signal of the control unit 20 to remove and filter the noise of the OLED output.

The OLED output unit 50 performs an output operation according to driving of the OLED driver unit 40. [

2 is a detailed block diagram of the power supply unit of FIG.

As shown, the power supply unit 10 includes a smoothing coil 11, a VCC resistor 12, and a GND resistor 13.

The smoothing coil 11 is connected in series to a power supply terminal VCC and a VCC resistor 12 and a GND resistor 13 are connected in parallel on both sides of the smoothing coil 11.

That is, the smoothing coil 11 is connected in series to the power supply terminal (VCC) to cut off the noise included in the power supply and smoothen it.

The VCC resistor 12 is connected in series to the power supply terminal VCC and is connected in parallel with the smoothing coil 11 to filter the noise at the power supply terminal.

The GND resistor 13 is connected in series to the power supply terminal VCC and is connected in parallel with the smoothing coil 11 and the other end is connected to the ground GND to filter the noise of the power supply terminal.

3 is a detailed block diagram of the OLED driver unit of FIG.

As shown, the OLED driver unit 40 includes an OLED output coil 41, an OLED + resistor 42, and an OLED-resistor 43.

Here, the OLED output coil 41 is connected in series to the OLED output unit 50, and an OLED + resistor 42 and an OLED-resistor 43 are connected in parallel to both sides thereof.

The OLED output coil 41 is connected in series to the OLED output unit 50 to block and smooth noise contained in the power source.

The OLED + resistor 42 is connected in parallel with the OLED output coil 41, and is connected to the positive terminal of the OLED element to filter the noise.

In addition, an OLED-resistor 43 is connected in parallel with the OLED + resistor 42 and is connected to the negative terminal of the OLED element to filter the noise.

4A and 4B are graphs showing noise level test results according to the operation of the power supply unit of the present invention shown in FIG.

The power supply unit 10 of the present invention includes a smoothing coil 11 connected in series to a power supply terminal VCC and a VCC resistor 12 and a GND resistor 13 on both sides of the smoothing coil 11, ) Are connected and tested in parallel. As a result, it can be seen that the noise level is measured lower than the reference value as shown in FIGS. 4A and 4B.

5A to 5C are graphs illustrating noise level test results according to the operation of the OLED driver unit of the present invention shown in FIG.

As shown, the OLED driver unit 40 of the present invention connects the OLED output coil 41 in series with the OLED output 50 and has an OLED + resistor 42 and an OLED-resistor 43 As a result, it can be seen that the noise level is measured to be lower than the reference value.

Therefore, according to the high-efficiency OLED control apparatus of the present invention configured as described above, it is possible to eliminate electromagnetic noise at the power supply end, to block electromagnetic waves and noise generated when the OLED is driven through smoothing and filtering operations, .

The embodiments of the present invention described in the present specification and the configurations shown in the drawings relate to preferred embodiments of the present invention and are not intended to cover all of the technical ideas of the present invention so that various equivalents And variations are possible. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. And such changes are within the scope of the claims of the present invention.

10: Power supply unit
20: control unit
30: Touch input unit
40: OLED driver unit
50: OLED output section
11: Smoothing coil
12: VCC resistance
13: GND Resistance
41: OLED output coil
42: OLED + resistance
43: OLED-resistance

Claims (3)

A smoothing coil for receiving and converting AC power into a DC power source and for blocking and smoothing noise of the input power source and smoothing and smoothing the noise included in the power source by being connected in series to the power source stage; A VCC resistor connected in parallel with the smoothing coil for filtering noise at a power supply terminal, and a GND resistor connected in series to the power supply stage and connected in parallel with the smoothing coil, the other end being connected to ground, A power supply unit including a power supply unit;
A touch input unit for inputting a user operation signal;
A control unit for outputting an OLED control signal according to an input of the touch input unit;
An OLED driver unit driven by a power source converted from the power unit and controlled in a driving state according to a control signal of the control unit to remove noise from an OLED output and filter the OLED driver; And an OLED output unit for performing an output operation according to driving of the OLED driver unit.
delete The method according to claim 1,
The OLED driver unit includes:
An OLED output coil connected in series to the OLED output unit to cut off and smooth noise contained in the power supply;
An OLED + resistor connected in parallel with the OLED output coil and connected to an end of the OLED element to filter noise; And
And an OLED-resistor connected in parallel with the OLED + resistor and connected to an end of the OLED element to filter noise.
KR1020150124191A 2015-09-02 2015-09-02 Apparatus for controlling High-efficiencyOLED KR101591759B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014068423A (en) * 2012-09-24 2014-04-17 Toshiba Lighting & Technology Corp Power supply unit and lighting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014068423A (en) * 2012-09-24 2014-04-17 Toshiba Lighting & Technology Corp Power supply unit and lighting device

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