CN102983149A

CN102983149A - Production method for double-sided light-emitting OLED display screen

Info

Publication number: CN102983149A
Application number: CN2011102595747A
Authority: CN
Inventors: 潘俊生
Original assignee: JIANGSU DONGLIN ELECTRONIC CO Ltd
Current assignee: JIANGSU DONGLIN ELECTRONIC CO Ltd
Priority date: 2011-09-05
Filing date: 2011-09-05
Publication date: 2013-03-20

Abstract

The present invention relates to a production method for a double-sided light-emitting OLED display screen. A same glass substrate is divided into at least two light emitting zones, and the anode of each light emitting zone is located on the same glass substrate; wherein a transparent electrode is used as the anode in one of the light emitting zone, while an opaque electrode is used as a cathode; an opaque metal is used as the anode, while an opaque electrode is used as a cathode in another light emitting zone; and an opaque metal is used as the anode, while a semi-transparent electrode or a transparent electrode is used as a cathode in another light emitting zone; and various organic material function layers are arranged between the corresponding anode and cathode, and each of the anodes in the same glass substrate controls the corresponding cathode separately, to achieve independent driving and light emitting of each light emitting zone. The method of the present invention is characterized by independent drive, independent light-emitting and flexibility.

Description

The double side luminous OLED display screen manufacture method

Technical field

The present invention relates to field of optoelectronic devices, be specifically related to the double side luminous OLED display screen manufacture method.

Background technology

Organic electroluminescent device OLED is as a kind of new product, with present main flat-panel monitor product liquid crystalline phase ratio, have lot of advantages and have very strong competitiveness, very likely become the main product of flat-panel monitor of future generation, the general structure of organic electroluminescence device is a kind of thin-film device of similar sandwich structure, on it, lower is respectively negative, positive electrode (corresponding also be referred to as top electrode and bottom electrode), most of organic electroluminescence devices use transparent ito thin film as positive electrode, light sends from this side, and with rigidity or flexible base, board such as glass, plastics, stainless steel substrates etc. are as ito thin film and organic material, the support substrates of top electrode; The general employing of upper electroplax has the metal film of reflection function as the negative electricity plate, clip the organic material functional layer of single or multiple lift different materials kind and different structure between two electrodes, be followed successively by empty implanted layer, empty transport layer, luminescent layer, electron transfer layer, electron injecting layer.Organic electroluminescence device is that electricity injects the shape luminescence component, after positive electrode and negative electrode add operating voltage, the hole is from positive electrode, electronics is injected into the device work organic material layer from negative electrode, two kinds of charge carriers form in luminous organic material that the hole--duplet is luminous, and light sends from bottom electrode one side.

At present, the product on the market substantially all is that following light emitting display is main, realizes that by drive difference is independent luminous if the OLED display screen can satisfy the two sides simultaneously, then can greatly improve OLED display products surcharge.Thereby each research and development institution and group all successively are studied the double-side display screen, have obtained certain achievement.

Therefore research and develop and a kind ofly both can realize the double-side function, it is significant not increasing again the design of making this.

Summary of the invention

The objective of the invention is to propose a kind of double side luminous OLED display screen manufacture method.

To achieve these goals, the present invention has been divided into two light-emitting zones at least at same glass substrate, and each luminous zone anode is positioned on the same glass substrate, and one of them luminous zone adopts transparent electrode as anode, adopts lighttight electrode as negative electrode; Another luminous zone adopts opaque metal to make this anode, adopts lighttight electrode as negative electrode; Another luminous zone adopts opaque metal as anode, adopts the electrode of semi-transparent or printing opacity as negative electrode; Between the corresponding anodic-cathodic each organic material functional layer is set, the anode that is positioned at same glass substrate is controlled corresponding negative electrode separately, realizes each light-emitting zone drive, and is independent luminous.

The manufacture method of double side luminous OLED display screen may further comprise the steps:

1, adopts the substrate of light transmissive material, on substrate, cover the layer of transparent conductive film, and then cover the lighttight metal electrode of one deck, form substrate; The lighttight metal of a harsh part on substrate;

2, harshly go out anode pattern, the transparent conductive film district that exposes is as a luminous anode, and remaining lighttight metal area is as the anode of another luminous zone;

3, on substrate, increase successively each organic material functional layer of plating simultaneously;

4, respectively at the lighttight negative electrode of corresponding transparent conductive film district evaporation one deck, to regard to behind the translucent or transparent negative electrode of lighttight metal area evaporation one deck, encapsulation.

The present invention adopts a chip, to each light emitting display difference drive, independent luminous, and shows that the distribution of light-emitting zone, can be flexible and changeable according to the requirement of product.Be very suitable for main screen of mobile phone and secondary screen, perhaps other needs the display screen of double-sided display function.

Description of drawings

Fig. 1 is the plan view of double side luminous OLED display screen:

Fig. 2 is the sectional view of double side luminous OLED display screen;

Fig. 3 is the OLED device architecture in transparent ITO electrode district;

Fig. 4 is light tight metal electric polar region OLED device architecture;

Fig. 5 is the plan view of light-emitting zone Distributed Implementation example one of the present invention;

Fig. 6 is the plan view of light-emitting zone Distributed Implementation example two of the present invention.

Embodiment

As shown in Figure 1, a kind of double side luminous OLED display screen, in glass substrate two zones that distributed, the corresponding lower luminous zone of difference and upper luminous zone, adopt transparent ITO electrode as the anode of lower luminous zone OLED device, transparent anode can also be used AZO, semi-transparent metals film and macromolecule organic film, adopt lighttight electrode as the negative electrode of lower luminous zone OLED device, realize lower luminous, light tight negative electrode mainly is the metal material that utilizes some low work functions of electronic injection, such as Al, Mg:Ag or Ca, Ba etc.Adopt opaque metal as the anode of upper luminous zone OLED device, light tight anode is the metal material of high work function, such as Cr, Ag, Cu, Au, Pt, Mo etc.; Adopt the electrode of semi-transparent or printing opacity as the negative electrode of upper luminous zone OLED device, luminous in the realization.Above-mentioned OLED device can be ordinary construction device, PII structure devices, PIN structure devices or Stacked structure devices.Two anodes namely descend the transparent ITO electricity in luminous zone and the opaque electrode in upper luminous zone to be positioned on the same substrate, and the light tight negative electrode of the lower luminous zone of control and the transparent cathode of upper luminous zone realize double-side respectively.

Above-mentioned opaque or transparent cathode is the two-layer combined electrode structure that two kinds of metal materials form, in order to be beneficial to the injection of electronics, at first increase the metal of plating one deck low work function relative thin, transparent, such as Al, and then increase the plating layer of transparent or translucent metal such as Ag as auxiliary electrode, purpose is the resistance that reduces electrode.

Clear for lower luminous zone and upper luminous zone are separated, a pattern isolated area 30 is set between plane, two luminous zones because the negative electrode of lower luminous zone and upper luminous zone respectively independent evaporation finish, so can realize by design plated film plate washer; The pattern isolated area can be used photoresist protection high electric rate, lighttight, reduces lower luminous zone and the upper luminous zone leakage current when driving.

As shown in Figure 2, characterized the basic composition structure of substrate, formed by substrate 10, transparency electrode 11 and opaque metal electrode 20 3 parts.Such as Fig. 3, shown in Figure 4, the OLED device architecture in transparent ito anode district comprises glass substrate 10, place the transparent ito anode 11 on the substrate, place the empty implanted layer 12 on the anode, place the empty transport layer 13 on the empty implanted layer, place the luminescent layer 14 on the empty transport layer, place the electron transfer layer 15 on the luminescent layer, place the electron injecting layer 16 on the electron transfer layer, place the negative electrode 17 above the electron injecting layer, the OLED device architecture in lighttight metal anode district comprises the opaque electrode as anode, places the empty implanted layer 12 on the anode, places the empty transport layer 13 on the empty implanted layer, place the luminescent layer 14 on the empty transport layer, place the electron transfer layer 15 on the luminescent layer, place the electron injecting layer 16 on the electron transfer layer, place the negative electrode 18 above the electron injecting layer.Wherein the negative electrode 17 on the electronic shell in transparent ITO electrode district is lighttight, it but is transparent or semitransparent that face places the negative electrode 18 of the electron injecting layer in light tight metal anode district, both independently complete respectively, the transmitance of regulating light by the different thickness of regulating both, during making, above-mentioned each organic function layer between the two pairs of anode and cathode can increase plating simultaneously successively.

On same substrate, can also arrange many to Structure of the cathode and the anode during making, make the distribution of the independent light-emitting zone in the luminous OLED display screen can flexible and changeable (such as Fig. 5), to satisfy the various needs of specific product design, each light-emitting area is independent luminous, drive can be made monochrome, double-colored, three looks even full color display.A background light source or information display background lamp are set in display screen among Fig. 6 in addition, make the distribution of display screen light-emitting zone abundanter.

The detailed manufacturing process of above-mentioned double side luminous OLED display screen mainly may further comprise the steps:

1, adopts the glass transparent substrate, on substrate, cover layer of transparent ITO conductive film, then now cover the lighttight Ag metallic film of one deck, form substrate;

2, the front cleaning of substrate process, spin coating one deck photoresist, after solidifying, expose, developing, the lighttight Ag metallic film of harsh part on substrate;

3 and then through front cleaning, spin coating one deck photoresist, solidify, exposure, develop after, harshly go out the bar shaped anode pattern; The transparent ITO conductive film district that exposes is as the anode of a lower luminous zone, and the lighttight Ag metal area of its work is as the anode of upper luminous zone;

4, make cathode insulated column;

5, adopt identical mask plate simultaneously successively evaporation cavity implanted layer, empty transport layer, luminescent layer, electron transfer layer, these organic material functional layers of electron injecting layer on substrate;

6, last, adopt different mask plates respectively corresponding to the lighttight negative electrode of transparent conductive film district evaporation one deck, behind the negative electrode corresponding to lighttight Ag metal area evaporation layer of transparent, encapsulate.

In addition, also can evaporation one deck semitransparent cathode at the lighttight metal area of correspondence, behind the evaporation on semitransparent cathode again evaporation one deck be used for reducing the transparency electrode of electrode resistance.Or be used for reducing the SiNx film of microresonator effect at the existing evaporation one deck of semitransparent cathode.

Although the above form that the present invention's employing is given an example has been carried out concrete system and has been described, but one of ordinary skill in the art should be understood, these disclosed contents just as an example, under the premise without departing from the spirit and scope of the present invention, can do many changes roughly the same in the details of each several part.

Claims

1. double side luminous OLED display screen manufacture method, it has been divided into two light-emitting zones at least at same glass substrate, each luminous zone anode is positioned on the same glass substrate, and one of them luminous zone adopts transparent electrode as anode, adopts lighttight electrode as negative electrode; Another luminous zone adopts opaque metal to make this anode, adopts lighttight electrode as negative electrode; Another luminous zone adopts opaque metal as anode, adopts the electrode of semi-transparent or printing opacity as negative electrode; Between the corresponding anodic-cathodic each organic material functional layer is set, the anode that is positioned at same glass substrate is controlled corresponding negative electrode separately, realizes each light-emitting zone drive, and is independent luminous; It is characterized in that may further comprise the steps:

(1) substrate of employing light transmissive material covers the layer of transparent conductive film on substrate, and then covers the lighttight metal electrode of one deck, forms substrate; The lighttight metal of a harsh part on substrate;

(2) harshly go out anode pattern, the transparent conductive film district that exposes is as a luminous anode, and remaining lighttight metal area is as the anode of another luminous zone;

(3) on substrate, increase successively each organic material functional layer of plating simultaneously;

(4) respectively at the lighttight negative electrode of corresponding transparent conductive film district evaporation one deck, to regard to behind the translucent or transparent negative electrode of lighttight metal area evaporation one deck, encapsulation.