CN100382336C - Organic luminous diode display device - Google Patents
Organic luminous diode display device Download PDFInfo
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- CN100382336C CN100382336C CNB031236472A CN03123647A CN100382336C CN 100382336 C CN100382336 C CN 100382336C CN B031236472 A CNB031236472 A CN B031236472A CN 03123647 A CN03123647 A CN 03123647A CN 100382336 C CN100382336 C CN 100382336C
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- display device
- scan line
- led display
- organic led
- light
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Abstract
The present invention discloses a display device of an organic light emitting diode. Scanning lines are arranged according to the distance placement of circuits, and a light emitting area is controlled by the magnitude of an elemental area, namely that the circuits are short, the voltage drop is small and the pixel display area is big; otherwise, the circuits are long, the voltage drop is great, and the pixel display area is small. Each display pixel can maintain the same current density, and consequently, the light emitting brightness of the whole display device of the organic light emitting diode is the same.
Description
Technical field
The present invention relates to a kind of organic LED display device, it mainly is the luminosity that has improved the organic light emitting diode display image, makes it more even.
Background technology
Organic LED display panel (Organic Light-Emitting Diode, OLED), be called organic electro-luminescent display (Organic Electroluminescence again, OEL), have the not readily accessible technology of new generation of other flat-panel screens technology, promptly brighter and full-color more clearly image and quicker reaction speed.
The basic structure of OLED is that the indium tin oxide (ITO) by a thin and transparent semiconductor property is an anode, itself and metallic cathode as the hierarchical architecture with the organic material layer double team therein, organic material layer comprise hole transmission layer (HTL), luminescent layer (EL), with electron transfer layer (ETL).When battery provides suitable voltage (characteristic of low voltage), the electric charge of hole with negative electrode that injects anode is when luminescent layer combines, can excite organic material to produce light (electroluminescence), the framework of organic layer and the selection of both positive and negative polarity design are to allow the OLED device give full play to the key of luminous efficacy.
The characteristics of OLED be self-luminous arranged, do not need backlight module, low voltage drive (less than 10Volts) and power saving, energy-efficient (16lm/W), high brightness (can reach 100,000cd/m
2More than), response time short (less than 2 μ s), high contrast, wide viewing angle (near 180 °), in light weight, thin thickness, simple structure, manufacturing low cost, pliability (plastic-substrates) and can full-colorization.
So the utilization scope of OLED is extensively, and market potential is all arranged in display or lighting apparatus very much.As: mobile phone, game machine, sound equipment panel, digital camera, personal digital assistant's machine (PDA), auto-navigation system, e-book, information household appliances, notebook computer, monitor, TV etc.
Again, the type of drive of OLED can be divided into two types of passive type driving and active drivings etc.; Passive type drive have the additional outward IC chip of moment high brightness luminescent (dynamic driving/selective), panel, the scanning of line multi step format, contrast control easily, low cost/high voltage drive, design alteration is easy, delivery date is short advantages such as (manufacture craft are simple).And, active driving has continuously luminous (stable state driving), TFT design of drive circuit/built-in film-type drive IC, line multi step format are smeared the data of writing, (Thin Film Transistor TFT) forms organic electroluminescence pixel, low voltage drive/low consumption electric energy/expensive, long advantages such as (but complex manufacturing technology) of luminescence component life-span on the substrate at thin-film transistor.
The organic LED display device that existing passive type drives, especially refer to large tracts of land, high-resolution display, because of scan period height, immediate current big, during the required driving force of the not enough panel of drive circuit fan-out capability, the panel upper tracer can cause pressure drop difference big because of backguy resistance value difference, even have influence on the drive current difference that flows through each pixel, then display brightness is inhomogeneous when the current density difference.
Again, U.S. Pat 6,459,208 " Active Matrix Electroluminscent DisplayDevice ", this patent is had by Philips company.This patent proposes the design apparatus of active-matrix OLED (AMOLED), and advantage is to have improved the brightness irregularities phenomenon that causes because of pressure drop; Shortcoming then is that still very difficult control brightness is even fully when improving brightness irregularities, and complex structure.
Summary of the invention
So, main purpose of the present invention, be to solve above-mentioned defective, for avoiding the existence of this disappearance, the present invention has improved organic electro-luminescent display when showing that large scale, high-resolution or layout line impedance are too high, because the brightness of display pixel is because of the capabilities limits of drive IC, and cause the situation of display brightness inequality.
The present invention utilizes each bar scan line far away apart from drive source, and the characteristic that its brightness, current density are more successively decreased is successively decreased the OLED light-emitting zone one by one along scan line.Because of identical with the diode characteristic of a slice OLED display, so luminosity depends primarily on current density, and two main causes that influence current density are electric current and light-emitting zone; When the scan line layout trace width that changes negative electrode, the data line layout trace width of anode is identical, like this because the relation that light-emitting zone varies in size can make current density reach identical, thereby improves image uniformity.
Description of drawings
Fig. 1 is the schematic layout pattern of existing organic LED display panel.
Fig. 2 is the schematic layout pattern of organic LED display panel of the present invention.
Fig. 3 is the diode arrangement schematic diagram of organic LED display panel of the present invention.
Fig. 4 is a scan line schematic layout pattern of the present invention.
Fig. 5 is a data line layout schematic diagram of the present invention.
Embodiment
Relevant detailed description of the present invention and technology contents, existing accompanying drawings is as follows:
Seeing also shown in Figure 1ly, is the schematic layout pattern of existing organic LED display panel, and as shown in the figure: existing layout type uses the scan line S of same widths
1', S
2', S
3', S
4' ..., S
N-1', S
n' as the data wire D of negative electrode, same widths
1', D
2', D
3', D
4', D
5' ..., D
N-1', D
n' as anode, and negative electrode and anode overlapping zone have been and want LED display panel (Organic Light-Emitting Diode, light-emitting zone 10 ' OLED).
With article one scan line S
1' be example: because of OLED moment receives data wire D
1', D
2', D
3', D
4', D
5', D
6' ..., D
N-1', D
n' electric current of n bar data wire altogether, work as S
1' when immediate current is big, scan line S
1' the pressure drop meeting that go up to produce makes data wire D
1', D
2', D
3', D
4', D
5' ..., D
N-1', D
n' on drive current source be difficult for the electric current of output fixed size, this brightness meeting to OLED influences S to some extent
1'/D
1' negative electrode at luminous place is because of range sweep line S
1' drive source nearest, pressure drop is minimum, data wire D
1' on drive current stable; And S
1'/D
n' negative electrode at luminous place is because of range sweep line S
1' drive source farthest, the pressure drop maximum, easily make data wire D
n' on drive current depart from normal value, with respect to S
1'/D
1' the luminous zone, S
1'/D
n' luminous place current density diminishes.Can draw current density from the above mentioned relatively concerns and is: S
1'/D
1'＞S
1'/D
2'＞S
1'/D
3'＞...＞S
1'/D
N-1'＞S
1'/D
n'.Otherwise, with second scan line S
2' be example: S
2'/D
1' cathode distance scan line S
2' drive source farthest, the pressure drop maximum, easily make data wire D
1' on drive current depart from normal value; And S
2'/D
n' negative electrode because of range sweep line S
2' drive source nearest, pressure drop is minimum, so data wire D
n' on drive current more stable relatively, its current density relatively concerns and is: S
2'/D
1'＜S
2'/D
2'＜S
2'/D
3'＜...＜S
2'/D
N-1'＜S
2'/D
n'.
So for addressing the above problem, the present invention proposes to improve the mode that the problems referred to above are brightness irregularities, it is identical by Control current density, thereby control brightness is even.
Please consulting simultaneously shown in Fig. 2,3, is the layout and the diode arrangement schematic diagram of organic LED display panel of the present invention, and as shown in the figure: the present invention utilizes each bar scan line S
1, S
2, S
3, S
4..., S
N-1, S
nIf descending luminance, current density are successively decreased, then OLED light-emitting zone 10 is successively decreased one by one; If the characteristic that brightness increases progressively, current density increases progressively increases progressively OLED light-emitting zone 10 one by one, like this, can reach the even brightness purpose so that each current density is identical.
So the present invention utilizes each bar scan line S
1, S
2, S
3, S
4..., S
N-1, S
nFar away apart from drive source, the characteristic that its brightness, current density are more successively decreased, and OLED light-emitting zone 10 is successively decreased one by one along scan line.Because of with diode 11 characteristics identical (as shown in Figure 3) of a slice OLED display, so luminosity depends primarily on current density, and two main causes that influence current density are electric current and light-emitting zone 10.As the scan line S that changes negative electrode
1, S
2, S
3, S
4..., S
N-1, S
nLayout trace width (as shown in Figure 4), the data wire D of anode
1, D
2, D
3, D
4, D
5, D
6..., D
N-1, D
nLayout trace width identical (as shown in Figure 5), so the area relationship of light-emitting zone 105 is S
1/ D
1＞S
1/ D
2＞S
1/ D
3＞S
1/ D
4＞S
1/ D
5＞S
1/ D
6＞...＞S
1/ D
N-1＞S
1/ D
n, can make current density relatively reach identical, be S
1/ D
1=S
1/ D
2=S
1/ D
3=S
1/ D
4=S
1/ D
5=S
1/ D
6=...=S
1/ D
N-1=S
1/ D
n, can improve image uniformity like this.
Promptly, can't satisfy the driving force of panel for compensation drive circuit, and use simple and easy panel layout device to improve the difference of pressure drop, the present invention makes current density identical to reach the uniform purpose of luminosity, and the present invention only need change the layout type of traditional design, do not influence manufacturing process, so do not increasing manufacturing cost, crosstalk (Crosstalk) is improved, make the light-emitting zone 10 that pixel driving current is bigger, electric current flows through bigger on the other hand, so can make the circuit layout mode reach Geng Jiahua.
Obviously, for a person skilled in the art, under the prerequisite that does not deviate from the spirit and scope of the present invention, can make various changes and variation to the present invention.Therefore, various change of the present invention, the content that changes by appending claims and equivalent thereof contain.
Claims (3)
1. organic LED display device comprises:
One group of scan line that forms by the cathode layer of described organic LED display device (S1, S2, S3, S4, Sn-1, Sn);
One group of data wire that forms by the anode layer of described organic LED display device (D1, D2, D3, D4, D5, D6, Dn-1, Dn);
It is characterized in that: the zone of the overlapping of described scan line and described data wire is the light-emitting zone (10) of described display pixel, and described scan line layout type is that the near line road of healing of the circuit near described scan line power end is wideer, and narrower apart from the described scan line power end circuit far away of healing.
2. organic LED display device according to claim 1 is characterized in that: comprise an Organic Light Emitting Diode (11) in the described light-emitting zone.
3. organic LED display device according to claim 1 is characterized in that: the layout of described data wire (D1, D2, D3, D4, D5, D6, Dn-1, Dn) is that its trace width unanimity is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031236472A CN100382336C (en) | 2003-05-12 | 2003-05-12 | Organic luminous diode display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031236472A CN100382336C (en) | 2003-05-12 | 2003-05-12 | Organic luminous diode display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1549350A CN1549350A (en) | 2004-11-24 |
| CN100382336C true CN100382336C (en) | 2008-04-16 |
Family
ID=34321403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031236472A Expired - Fee Related CN100382336C (en) | 2003-05-12 | 2003-05-12 | Organic luminous diode display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100382336C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104252071B (en) * | 2014-09-24 | 2017-10-17 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and its array base palte |
| CN106098739B (en) * | 2016-07-21 | 2019-06-04 | 广州新视界光电科技有限公司 | A kind of OLED illumination panel and preparation method thereof |
| KR102572404B1 (en) * | 2018-11-27 | 2023-08-29 | 엘지디스플레이 주식회사 | Display panel and displa device |
| CN112689868A (en) * | 2018-12-24 | 2021-04-20 | 深圳市柔宇科技股份有限公司 | Display panel, preparation method thereof and display device |
| CN111048494B (en) * | 2019-03-15 | 2022-05-17 | 深圳第三代半导体研究院 | Front-mounted integrated unit diode chip |
| CN110797370B (en) * | 2019-05-06 | 2022-06-24 | 深圳第三代半导体研究院 | Integrated unit diode chip |
| CN110931614B (en) * | 2019-05-08 | 2021-08-13 | 深圳第三代半导体研究院 | Front-mounted integrated unit diode chip |
| CN110619819B (en) * | 2019-09-17 | 2021-07-13 | Oppo广东移动通信有限公司 | Folding screen and electronic equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6459208B2 (en) * | 2000-01-07 | 2002-10-01 | Koninklijke Philips Electronics N.V. | Active matrix electroluminescent display device |
-
2003
- 2003-05-12 CN CNB031236472A patent/CN100382336C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6459208B2 (en) * | 2000-01-07 | 2002-10-01 | Koninklijke Philips Electronics N.V. | Active matrix electroluminescent display device |
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| Publication number | Publication date |
|---|---|
| CN1549350A (en) | 2004-11-24 |
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