KR20080102527A - Organic light emitting display device - Google Patents

Organic light emitting display device Download PDF

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Publication number
KR20080102527A
KR20080102527A KR1020070049112A KR20070049112A KR20080102527A KR 20080102527 A KR20080102527 A KR 20080102527A KR 1020070049112 A KR1020070049112 A KR 1020070049112A KR 20070049112 A KR20070049112 A KR 20070049112A KR 20080102527 A KR20080102527 A KR 20080102527A
Authority
KR
South Korea
Prior art keywords
voltage
organic
display panel
light emitting
organic light
Prior art date
Application number
KR1020070049112A
Other languages
Korean (ko)
Inventor
문창섭
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020070049112A priority Critical patent/KR20080102527A/en
Publication of KR20080102527A publication Critical patent/KR20080102527A/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
    • G09G3/3258—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 voltage across the light-emitting element
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
    • 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
    • G09G2330/021—Power management, e.g. power saving

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting display device, comprising: R (Red), G (Green), and B (Blue) organic materials, a display panel displaying an image through the organic materials, and a scan signal and data on the display panel. An organic light emitting display including a driver for supplying a signal and individually supplying a voltage suitable for each of R, G, and B organic materials, and a controller for applying a driving voltage and a control signal for controlling the display panel to the driving unit Relates to a device.

Description

Organic light emitting display device

1 is a general OLED configuration diagram.

2 is a block diagram illustrating a configuration of a conventional organic light emitting display device.

3 is a block diagram illustrating a configuration of an organic light emitting display device according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100 Display panel 200 Drive part

300 Controller 400 DC / DC Converters

210 voltage level setting section

The present invention relates to an organic light emitting display device.

Organic Light Emitting Diodes (OLEDs) are self-luminous devices that self-luminesce fluorescent materials by recombination of electrons and holes, and are also referred to as organic diodes or organic ELs. Compared to LCDs requiring a separate light source, these OLEDs have fast response speed, low DC driving voltage, and can be made thin, so that they can be wall-mounted or portable.

OLED has 3 (Red, Green, Blue) color independent pixel method, color conversion method (CCM), color filter method in color display method, and it is passive type according to low molecular OLED, high molecular OLED, driving method according to emitting materials used for display It is divided into a passive matrix and an active matrix.

1 is a general OLED configuration diagram. As shown in FIG. 1, among the various components constituting the OLED, the organic EL element 3 is positioned under the glass 1. This organic EL element 3 is composed of organic compounds of red (R), green (G), and blue (B). In order to drive the organic EL element 3, three kinds of signals such as a scan signal, a data signal, and a bias voltage are required.

2 is a block diagram illustrating a configuration of a conventional organic light emitting display device.

As shown in FIG. 2, the driver 20 supplies a scan signal and a data signal to the display panel 10. In this case, the voltage supplied to the display panel 10 from the driver 20 uses the voltage output from the controller 30 and converted through the DC / DC converter 40.

On the other hand, the organic material of each of R, G, and B of the display panel 20 has different luminance characteristics compared to current. That is, the currents required to generate the same luminance in the R, G, and B organic materials of the display panel 20 are different. However, in the conventional organic light emitting display device, the same voltage is applied to the R, G, and B organic materials. Accordingly, there is a problem that unnecessary waste of current is caused by applying a high voltage to the organic material which can be driven at a low voltage.

The present invention provides an organic light emitting display device capable of eliminating unnecessary waste of current by supplying voltages suitable for R, G, and B organic materials, respectively.

The present invention includes R (Red), G (Green), B (Blue) organic material, a display panel for displaying an image through the organic material, and supplies a scan signal and a data signal to the display panel, the R, G And a controller for individually supplying a voltage suitable for each organic material, and a controller for applying a driving voltage and a control signal for controlling the display panel to the driving unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a block diagram illustrating a configuration of an organic light emitting display device according to an embodiment of the present invention. The organic light emitting display device includes a display panel 100, a driver 200, a controller 300, and a DC / DC converter 400.

The display panel 100 includes R (Red), G (Green), and B (Blue) organic materials, and serves to display an image through the organic materials.

The driver 200 supplies a scan signal and a data signal to the display panel 100 and separately supplies voltages suitable for organic materials of R, G, and B, respectively. In FIG. 3, the driving unit 200 includes a voltage level setting unit 210 which individually sets a voltage level suitable for each organic material of R, G, and B, and supplies them individually. In one embodiment of the present invention, the driving unit 200 may be composed of an IC (Intergrated Circuit).

The controller 300 supplies a driving voltage to the driving unit 200 and applies a control signal for controlling the display panel 100.

The DC / DC converter 400 converts the voltage Vbat from the controller 300 into a voltage suitable for the driving unit 200 and supplies the converted voltage. For example, if the voltage Vbat coming from the controller 300 is 30 [V] and the voltage suitable for the driving unit 200 is 15 [V], the DC / DC converter 400 sets 30 [V] to 15 [V]. It is converted into [V] and supplied to the driving unit 200.

As shown in FIG. 3, in the present invention, the driving unit 200 supplies a voltage to the R and G B organic materials of the display panel 100 through the data signal data. In this case, the voltages supplied to the R, G, and B organic materials are supplied with respective voltages. That is, the driving unit 200 supplies voltages suitable for R, G, and B organic materials individually. In general, among the R, G, and B organics, the efficiency of R organics is the lowest. Therefore, in the present invention, when the voltage supplied from the DC / DC converter 400 is applied to the R organic material as it is, and the appropriate voltage for each organic material is applied to the G organic material and the B organic material, the current consumption can be reduced. It becomes possible.

For example, in the case of a mass-produced 1.17 inch (96 * 96) size organic light emitting display device, the voltage applied to the driving unit 200 through the DC / DC converter 400 is about 15 [V]. The driving voltages suitable for the R, G, and B organic materials of the display panel 100 are different from each other. The driving voltage suitable for the R organic materials is 13 [V], and the driving voltage suitable for the G organic materials is 9 [V]. The driving voltage suitable for organic matter is 10 [V]. Considering the predetermined margin, it is appropriate to supply a voltage of 15 [V] to the R organic material, 11 [V] to the G organic material, and 12 [V] to the B organic material. Therefore, in the organic light emitting display device according to the present invention, the voltage level setting unit 210 of the driving unit 200 may set and apply a voltage level suitable for each organic material of R, G, and B. That is, in the present invention, a voltage of 15 [V] may be applied to the R organic material, 11 [V] to the G organic material, and 12 [V] to the B organic material. Compared with the prior art, since it is possible to supply a voltage of about 4 [V] in the G organic material and about 3 [V] in the B organic material, the current consumption can be reduced accordingly.

While the invention has been described using some preferred embodiments, these embodiments are illustrative and not restrictive. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit and scope of the invention as set forth in the appended claims.

According to the present invention, by supplying voltages suitable for R, G, and B organic materials in the organic light emitting display device, unnecessary waste of current can be eliminated.

Claims (3)

A display panel including R (Red), G (Green), and B (Blue) organic materials and displaying an image through the organic materials; A driving unit supplying a scan signal and a data signal to the display panel and individually supplying a voltage suitable for each of the organic materials of the R, G, and B; A controller which applies a driving voltage and a control signal for controlling the display panel to the driving unit An organic light emitting display device comprising a. The method of claim 1, The driving unit includes a voltage level setting unit for setting a voltage level suitable for each of the organic material of R, G, B, and separately supply. The method according to claim 1 or 2, And a DC / DC converter for converting and supplying a voltage from the controller to a voltage suitable for the driving unit.
KR1020070049112A 2007-05-21 2007-05-21 Organic light emitting display device KR20080102527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070049112A KR20080102527A (en) 2007-05-21 2007-05-21 Organic light emitting display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070049112A KR20080102527A (en) 2007-05-21 2007-05-21 Organic light emitting display device

Publications (1)

Publication Number Publication Date
KR20080102527A true KR20080102527A (en) 2008-11-26

Family

ID=40288199

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070049112A KR20080102527A (en) 2007-05-21 2007-05-21 Organic light emitting display device

Country Status (1)

Country Link
KR (1) KR20080102527A (en)

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