KR100590271B1 - Organic Electro Luminescence Device - Google Patents

Abstract

An organic light emitting device having a power switching unit including a jumper is disclosed. The jumper of the power switching section is disposed between the power supply section and the power lines of the panel section. The jumper of the power switching unit selects a variable power supply voltage transferred from the power supply unit to the panel unit through a power supply switching unit to control the self-emission of the organic light emitting diode of the panel unit and to improve the luminous efficiency of the organic light emitting diode of the panel unit. It can be maximized.

Description

Organic Electro Luminescence Device             

1 is a block diagram schematically illustrating an organic light emitting device according to the related art.

2 is a block diagram schematically illustrating an organic light emitting display device according to a preferred embodiment of the present invention.

3A and 3B are circuit diagrams illustrating a power switching unit of an organic light emitting display device according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

Organic electroluminescent device: 100, 200 Power source: 110, 210

Memory: 120, 220 Input buffer: 230

Program: 130, 240 A / D Converter: 250

Buffer section: 140 Power switching section: 260

Drive part: 150, 290 Output buffer part: 270

Panel: 160, 310 Gamma Correction: 280

Adapter: 112 FPC: 300

Step Down Regulator: 116 STP_VSS: 312

CTL_GND: 314 STP_-VSS: 316

STP_VSS /: 318 Jumper: 400

DD_HVSST: 402 DD_HVSST /: 406

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting device, wherein an organic light emitting diode in which light emission of an organic light emitting diode is controlled by inserting a power switching unit among power lines connected to a power supply unit and a panel unit to switch a variable power supply voltage transmitted from the power supply unit to the panel unit Relates to a device.

Recently, liquid crystal displays (LCDs) and organic light emitting diodes (OLEDs) are used in portable information devices due to their light weight and thinness. The organic light emitting device is attracting attention as a next-generation flat panel display because it has superior luminance and viewing angle characteristics as compared to the liquid crystal display.

Typically, in an active matrix organic light emitting device (AMOLED), one pixel includes R, G, and B unit pixels, and each R, G, and B unit pixel includes an EL element. Each EL element has an R, G, B organic light emitting layer interposed between the anode electrode and the cathode electrode to emit light from the R, G, B organic light emitting layer compared to the voltage applied to the anode electrode and the cathode electrode.

1 is a block diagram of a conventional organic light emitting device.

Referring to FIG. 1, the conventional organic light emitting device 100 may include a power supply unit 110, a memory unit 120, a program unit 130, a buffer unit 140, a driver unit 150, and a panel unit 160. It is composed.

The power supply unit 110 includes an adapter 112 and a step-down regulator 116, and the adapter 112 receives source power from a power supply, and thus the step-down regulator 116. Deliver source power to In addition, the adapter 112 receives a DC voltage of + 24V and 3.5A, and the received DC voltage is input to the step-down regulator 116. The step-down controller 116 steps down the source power using an internally connected power input connection pad, divides the source power for each internal circuit, and delivers a power voltage.

Therefore, the step-down controller 116 of the power supply unit 110 supplies a power supply voltage of 2.5V to the memory unit (SSRAM / ROM: 120) and a power supply voltage of 5V to the program unit (FPGA: 130). do. In addition, the step-down regulator 116 supplies a power supply voltage of 3.3V to the buffer unit 140 and applies the power supply voltages Vdata and Vsel to drive the data signal and the control signal to the driver unit 150. The power supply voltages Vdd and Vcat are applied to the panel 160 so that the organic light emitting diodes emit light.

Accordingly, it can be seen that the step-down controller 116 of the power supply unit 110 is a variable type that produces a plurality of power supply voltages. That is, the step-down controller 116 divides the source power input through the adapter 114 because the organic light emitting device of the panel 160 needs to receive various driving data in order to emit light normally. It is designed to be changed to the power supply voltage to deliver to each embedded circuit.

In addition, the internal circuits are collectively named as the memory unit 120, the program unit 130, the buffer unit 140, the driving unit 150, and the panel unit 160.

Next, the memory unit 120 is composed of a RAM and a ROM, which stands for Ramdon Access Memory, also called a random access memory. When the power supply voltage is turned off, the stored contents are erased. In addition, ROM stands for Read Only Memory, which is a read-only memory, and its contents remain even when the power supply voltage is turned off. In particular, the organic electroluminescent device 110 introduces a synchronous synchronous random access memory (SSRAM) in order to speed up the data processing of the RAM, so that the data 124 stored in the memory 120 is stored in the program unit 130. Make sure it is delivered quickly.

Next, the program unit (Field Programmable Gate Array) 130 receiving data from the memory unit 120 transmits a command signal and an address signal to the memory unit 120 according to program logic already implanted. signal). That is, the address of the memory unit 120 is designated according to the input command signal and the address signal, and data corresponding to the address is output to the program unit 130. Accordingly, the data received by the program unit 130 is processed by the program logic and transferred to the buffer unit 140.

Hereinafter, data processed and output according to the above-described process will be referred to as a program signal.

Next, the buffer unit 140 is a storage place for storing temporary information, and is used to compensate for a difference in time or information flow rate that occurs when transmitting the information from one device to another. In addition, the buffer unit 140 is a kind of register, and since it is an internal circuit that makes an address buffer for the transmission of an address, the program signal is temporarily transmitted from the program unit 130 to transmit the program signal. After compensating and adjusting the time, the program signal is transmitted to the driver 150.

Next, the driver 150 amplifies the program signal input from the program unit 130 by using a driving transistor mounted on the driver 150. That is, the driver 150 extends the program signal and transmits the program signal to the panel unit 160 so that the organic light emitting diode of the panel unit 160 can emit light smoothly.

Finally, the program signal amplified by the driving unit 150 is input to the organic light emitting element in the panel 160 to be self-luminous.

The problem with the conventional organic light emitting device having the structure as described above is as follows.

Since the variable power voltage applied from the power supply unit is used among the power lines connected to the power supply unit and the panel unit in the organic light emitting device, there is a problem that the light emission of the organic light emitting diode of the panel unit cannot be controlled.

That is, in order to solve such a problem, a power switching unit must be designed to select a variable power supply voltage applied from the power supply unit using a jumper among the power lines connected to the power supply unit and the panel unit.

An object of the present invention is to select the variable power supply voltage transmitted from the power supply unit to the panel unit among the power lines connected to the power supply unit and the panel unit of the organic light emitting device through the power switch jumper to perform self-emission of the organic light emitting diode of the panel unit. It is to provide a power switching unit for controlling.

The present invention for achieving the above object, the program unit for generating a program signal for controlling the operation of the organic light emitting device according to a predetermined implanted program; A memory unit for outputting the stored data signal to the program unit according to the control of the program unit; A driver for receiving a program signal output from the program unit and amplifying the received program signal; A panel unit for displaying a predetermined screen using the organic light emitting diode according to the program signal amplified by the driver; A power supply unit for supplying power required for operation of the program unit, memory unit, driver unit, and panel unit; And a power switching unit disposed between the power supply unit and the panel unit and configured to select a variable power supply voltage.

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

Example

2 is an overall block diagram of an organic light emitting display device according to an embodiment of the present invention.

Referring to FIG. 2, the organic light emitting device 200 includes a power supply unit 210, a memory unit 220, an input buffer unit 230, a program unit 240, an A / D converter 250, and a power switching unit. 260, an output buffer 270, a gamma corrector 280, a driver 290, a flexible printed circuit 300, and a panel 310.

The power supply unit 210 includes an adapter 212 and a step-down regulator 216, and the adapter 212 receives source power from a power supply and receives the step-down regulator 216. Deliver source power to That is, the step-down controller 216 receiving the DC power + 15V, 3A, which is the source power source through the adapter 212, steps down the DC voltage + 15V, 3A using an internally connected power input connection pad. step down). In addition, the step-down regulator 216 divides the source voltage DC voltage + 15V, 3A for each internal circuit to deliver a power supply voltage.

However, the internal circuit includes the memory unit 220, the input buffer unit 230, the program unit 240, the A / D converter 250, the power switching unit 260, the output buffer unit 270, and the gamma beam. The government 280, the driver 290 and the panel 310 is named generically.

Accordingly, the step-down controller 216 of the power supply unit 210 supplies the power voltages of 2.5V and 3.3V to the program unit FPGA 240, and the step-down controller 216 is the A / D converter unit 250. Power supply voltage of 12V. In addition, the step-down controller 216 supplies a power supply voltage of 5V to the memory unit (SSRAM / ROM) 220, the input buffer unit 230, the output buffer unit 270, and the driver 290. Subsequently, the step down controller 216 supplies a variable power supply voltage of 0V to 5V to the gamma correction unit 280, and the step down controller 216 supplies the organic light emitting device to the panel unit 310. The power supply voltages of the variable ELVDD of 0V to 10V and the variable ELVSS of -10V to 0V are applied to emit light.

Here, it can be seen that the step down regulator 216 of the power supply unit 210 is a variable type that produces a plurality of power supply voltages. That is, the step-down controller 214 divides the source power input through the adapter 212 because the organic light emitting diode of the panel 310 needs to receive various driving data in order to normally emit light. The power supply voltage is designed to be delivered to each internal circuit.

Next, the memory unit 220 is composed of a RAM and a ROM, which stands for Ramdon Access Memory, also called a random access memory. When the power supply voltage is turned off, the stored contents are erased. In addition, ROM is an abbreviation of Read Only Memory, which is a read only memory, and its contents remain even when the power supply voltage is turned off. In particular, the organic light emitting device 200 introduces a synchronous synchronous random access memory (SSRAM) in order to speed up the data processing of the RAM, so that image data of R, G, and B stored in the memory unit 220 is stored in the program. It is to be quickly delivered to the unit 240.

Next, the A / D converter 250 is a built-in circuit for converting an analog video signal into a digital video signal, and transfers the digital video signals Vsync, Hsync, DE (Data Enable), and Dclk (Data clock) to the program unit. do. In addition, the A / D converter 250 transmits the R, G, and B video signals to the input buffer unit 230. That is, the A / D converter 250 transfers the Vsync indicating the Y axis of the digital video signal, the Hsync indicating the X axis, and the DE controlling the Vsync and the Hsync to the program unit 240 and the A / D. The converter 250 transmits R, G, and B image signals to the input buffer unit 230.

Next, the program unit (FPGA: 240) is a digital image signal Vsync, Hsync, DE, Dclk input from the A / D converter 250 and the image data of the R, G, B input from the memory unit and the Receives R, G, and B video signals input from the input buffer unit 230. Accordingly, the program unit (FPGA) 240 applies a command signal and an address signal to the memory unit 220 according to the already implanted program logic. In addition, the memory unit 220 receives the command signal and the address signal, and outputs R, G, B image data corresponding to the address to the program unit 240. That is, the program unit 240 processes the received image data of the R, G, B, the digital image signals Vsync, Hsync, DE, Dclk and the image signals of R, G, B by the program logic. Next, the image data logic signals are switched to clk, start plus, and enable, and are transmitted to the output buffer unit 270.

Next, the input buffer unit 230 and the output buffer unit 270 are storage locations for storing temporary information, and are used to compensate for differences in information flow rates or differences in time that occur when transmitting information from one device to another. Device. In addition, the input buffer unit 230 and the output buffer unit 270 is a built-in circuit for making an address buffer for address transmission as a kind of register. That is, the input buffer 230 receives and temporarily stores the R, G, and B video signals of the A / D converter 250, and compensates and adjusts the flow rates of the R, G, and B video signals. After the noise is reduced and filtered, the noise is transmitted to the program unit 240. In addition, the output buffer unit 270 temporarily stores the image data logic signal input from the program unit 240 to compensate and adjust the flow rate to attenuate and filter noise, and then to the buffer. The stored image data of R, G, and B, the image signal of R, G, and B, and the image data logic signal are transferred to the driver 36.

However, it should be noted that the input buffer unit 230 and the output buffer unit 270 are not built-in circuits essentially provided in the organic light emitting device 200.

Next, the gamma correction unit 280 is a built-in device for preventing the organic light emitting device of the panel 310 from being darker or distorted than the actual amount of light and increasing the light emission rate of the organic light emitting device. Is designed to maintain. That is, the gray scale adjustment signal of the gamma correction unit 280 is input to the data driver divided into even and odd modes of the panel unit 310, and received from the driver 270 to the data driver of the panel unit 310. The R, G, and B image data are divided into nine steps, respectively, and the organic EL device is adjusted to display the gray level.

Next, the driver 290 having the voltage level shifter up-downs the image data logic signal received from the output buffer unit 270. The up and down of the image data logic signal is adjusted so that the voltage difference between the lowest voltage and the highest voltage becomes 5V to suit the characteristics of the driving transistor of the panel 310. The voltage level shifter also amplifies the image data logic signal. That is, the voltage level shifter of the driver 290 adjusts and amplifies the image data logic signal according to the signal level, transmits the image data logic signal to the panel unit 310, and the R and G received by the driver 290. Image data of B, and image signals of R, G, and B are transmitted to the panel unit 310.

Next, the FPC (flexible printed circuit: 300) is made of polyimide (PI), which stands for flexible flexible circuit board (flexible print circuit board), the electronics developed in accordance with the trend of miniaturization and light weight of electronic products The product is excellent in workability. In addition, since it is strong in heat resistance, grain resistance, chemical resistance, and heat, it is a core component of all electronic products such as cameras, computers and peripherals, mobile phones, video and audio equipment, camcorders, printers, DVDs, TFT LCDs, satellite equipment, military Widely used in equipment, medical equipment, etc. That is, the FPC 300 serves to connect the driving unit 290 and the panel unit 310 with each other. In addition, the R, G, B image data, the R, G, B image signal and the image data logic signal transmitted from the driver 290 is transmitted to the panel unit 310 via the FPC (300). .

Next, the power switching unit 260 is an embedded circuit designed among power lines connected to the power supply unit 210 and the panel unit 310, and drives the scan driver and the data driver of the panel unit 310. That is, the power switching unit 260 selects a variable power supply voltage of 0V to 10V, a variable power supply voltage of -10V to 0V, and ground (GND) applied through the switching method to the panel unit 310. It is delivered to the organic light emitting device of).

Finally, the organic light emitting diode of the panel unit receives the image data of the R, G, and B, the image signal of the R, G, and B, and the image data logic signal transmitted by the driver 290 to emit light. In addition, the organic light emitting diode of the panel unit 310 selectively selects the variable power supply voltage of 0V to 10V, the variable power supply voltage of -10V to 0V, and ground (GND) of the power switching unit 260 through a switching scheme. Receives light and emits light.

3A and 3B are circuit diagrams illustrating a power switching unit of an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 3A, the power switching unit 260 of the organic light emitting device is an internal circuit disposed between the power supply unit and the panel unit, and applies a variable power supply voltage to the scan driver and the data driver of the panel unit. That is, the power switch 260 is a jumper capable of switching so that the STP_VSS 312 of 0V to 10V, the STP_-VSS 316 of -10V to 0V and CTL_GND 314 of ground are selected from the power supply unit. 400, and controls the self-luminescence operation emitted from the organic light emitting device of the panel unit.

The jumper 400 of the power switching unit 260 is the STP_VSS 312 of 0V to 10V, the STP_-VSS 316 of -10V to 0V, and the CTL_GND 314 which is ground. Is designed to be selected via manual adjustment. The jumper 400 has a shape of a conductor plug, which is a header pin plated in a square shape, and the jumper 400 and two pins are connected to each other by being connected to the protruding pins and being opened when pulled out. It is designed to be. Accordingly, the jumper 400 according to the present invention includes three input pins and one output pin, and the STP_-VSS 312, STP_-VSS 316, and CTL_GND 314 outputted from the power supply unit to the panel unit. Is transferred to the input pin of the power switching unit 260, and according to the selection of the jumper 400, the input pin of the STP_VSS, the input pin of the STP_-VSS, and the input pin of the CTL_GND are connected to the output pin of the STP_VSS /. . In addition, the STP_VSS / 318 output from the output pin of STP_VSS / of the jumper 400 is transferred to the organic light emitting diode of the panel unit to control self-emission.

In this case, the center input pin of the jumper 400 is selected such that the CTL_GND 314 is input.

Referring to FIG. 3B, the jumper 400 of the power switching unit 260 is designed such that the DD_HVSST 402 and the CTL_GND 402 of 0V to 10V transmitted from the step-down controller of the power supply unit are selected through manual adjustment. do. Therefore, the jumper 400 in the present invention consists of two input pins and one output pin, and the DD_HVSST 402 and CTL_GND 314 outputted from the power supply unit to the panel unit are transferred to the input pin of the power switching unit. The input pin of the DD_HVSST 402 and the input pin of the CTL_GND 314 are connected to the output pin of DD_HVSST / according to the selection of the jumper. In addition, the DD_HVSST / 406 output from the output pin of the DD_HVSST / of the jumper 400 is transferred to the organic light emitting diode of the panel unit.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

According to the present invention described above, by designing a power switching unit having a jumper in the power line of the power supply unit and the panel unit to control the light emission of the organic light emitting device of the panel unit.

Claims (16)

A program unit for generating a program signal for controlling an operation of the organic light emitting device according to a predetermined implanted program; A memory unit for outputting the stored data signal to the program unit according to the control of the program unit; A driver for receiving a program signal output from the program unit and amplifying the received program signal; A panel unit for displaying a predetermined screen using the organic light emitting diode according to the program signal amplified by the driver; A power supply unit for supplying power required for operation of the program unit, memory unit, driver unit, and panel unit; And An organic light emitting device disposed between the power supply unit and the panel unit, the power supply switching unit selecting a variable power supply voltage. The method of claim 1, wherein the power switching unit, And a jumper for selecting the variable power supply voltage. The organic light emitting device of claim 2, wherein the variable power supply voltage has a range of -10V to 10V. The organic light emitting device of claim 2, wherein the jumper further selects ground (GND). The method of claim 1, wherein the organic light emitting device, An A / D converter for converting an analog signal into a digital signal; An input buffer unit for temporarily storing the output signal of the A / D converter; A gamma correction unit for gamma correcting a screen displayed on the panel unit; An FPC for performing electrical connection between the drive unit and the panel unit; And And an output buffer unit for temporarily storing the output signal of the program unit. The organic light emitting device of claim 5, wherein the A / D converter receives 12V from the power supply unit, converts an analog image signal into a digital image signal, and transmits the analog image signal to the program unit. 7. The method of claim 6, wherein the A / D converter converts an image signal of R, G, and B, which is an analog signal, into an image signal of R, G, and B, which is a digital signal, and transmits the image signal to the input buffer unit. Electroluminescent device. The organic light emitting device of claim 7, wherein the input buffer unit transmits R, G, and B image signals received from an A / D converter to the program unit. The display device of claim 5, wherein the gamma correction unit transmits the gray scale adjustment signal to the panel unit to divide the R, G, and B image data input to the data driver having the even mode and the odd mode of the panel unit into nine levels. An organic light emitting device, characterized in that. The organic light emitting device of claim 5, wherein the gamma correction unit receives a variable power supply voltage of 0V to 5V to the power supply unit. The organic light emitting device of claim 5, wherein the program unit processes the received digital image signal by program logic to convert the received digital image signal into an image data logic signal and transmits the converted image data logic signal to the output buffer unit. The organic light emitting diode of claim 5, wherein the output buffer unit temporarily stores R, G, and B image data, a digital image signal, and an image data logic signal received from the program unit and transfers the image data logic signal to a driving unit. Device. The organic light emitting device of claim 1, wherein the memory unit transmits R, G, and B image data to a program unit. The organic light emitting device of claim 1, wherein the power supply unit applies 2.5V and 3.3V to a program unit. 2. The organic light emitting device of claim 1, wherein the power supply unit applies a variable power supply voltage (ELVDD) of 0V to 10V and a variable power supply voltage (ELVSS) of −10V to 0V to the organic light emitting device of the panel unit. The method of claim 1, wherein the power supply unit, An adapter for receiving DC voltage + 15V, 3A, which is a source power source; And And a step-down controller for receiving a DC voltage of + 15V and 3A of the adapter from the adapter and generating a plurality of power supply voltages to apply the power supply voltage to the memory unit, the program unit, the driver unit, and the panel unit. Organic electroluminescent device.

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