CN102226998A

CN102226998A - Organic light-emitting pixel array

Info

Publication number: CN102226998A
Application number: CN2011101668562A
Authority: CN
Inventors: 陈鹏聿
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2011-10-26

Abstract

The invention provides an organic light-emitting pixel array, comprising a glass substrate, a plurality of pixel areas and virtual areas, wherein the plurality of pixel areas are arranged on the glass substrate; each pixel area comprises a pixel electrode, an isolation structure and a first blocking wall; the isolation structure is arranged on the glass substrate and covers an edge of the pixel electrode partially; and one virtual area is arranged between every two adjacent pixel areas. The organic light-emitting pixel array is utilized to prolong the drying time of materials, improve the uniformity of film formation, solve the dislocation problem caused by an ink jet printing technology and improve the manufacturing efficiency.

Description

Organic light-emitting pixel array

Technical Field

The present invention relates to an organic light emitting pixel array, and more particularly, to an organic light emitting pixel array having a training area beside a pixel area.

Background

An Organic Light Emitting device (abbreviated as OLED) is a new type of flat panel display device. Conventional Liquid Crystal Displays (LCDs), which do not emit light by themselves, require a backlight. An Organic Light Emitting Diode (OLED) device has a light emitting function and is a self-light emitting device, and thus, the Organic Light Emitting Diode (OLED) device can be more slim and light than an LCD and can save power. In addition, the organic light emitting diode (AMOLED) device has the characteristics of high reaction speed, high contrast, wide viewing angle and the like.

The organic material is sprayed in the pixel area to form the luminescent layer by using the ink jet printing process, and the uniformity of the organic luminescent layer is influenced because the drying time has a critical influence on the uniformity of the formed film and the drying time of the sprayed material is inconsistent. When the organic material is sprayed in the pixel area, the color mixing problem caused by dislocation can occur, and the manufacturing yield is influenced.

In view of the above, it is an urgent need for the industry to design an organic light emitting pixel array that can not only improve the uniformity of the organic light emitting layer, but also avoid the color mixing problem caused by the misalignment of the spraying.

Disclosure of Invention

Aiming at the problems of non-uniformity of film formation caused by inconsistent drying time of materials and color mixing caused by dislocation during material spraying of an organic light-emitting pixel array in the prior art, the organic light-emitting pixel array is provided.

According to an aspect of the present invention, there is provided an organic light emitting pixel array including: the display device comprises a glass substrate, a plurality of pixel areas and a virtual area. Wherein, a plurality of pixel regions are located on the glass substrate, and each pixel region includes: the pixel electrode, the isolation structure and the first retaining wall. The isolation structure is located on the glass substrate and partially covers the edge of the anode. The dummy area is located between two adjacent pixel areas.

Preferably, the isolation structure is made of an inorganic material.

Preferably, the first retaining wall is made of an organic material.

Preferably, the organic light emitting pixel array further includes a light emitting layer on the plurality of pixel regions.

Preferably, the light emitting layer is formed by an inkjet printing process.

Preferably, the dummy region is located between two adjacent first retaining walls of two adjacent pixel regions.

Preferably, a second retaining wall may be disposed between adjacent first retaining walls of two adjacent pixel regions.

Preferably, the second barrier wall partitions a region between two adjacent pixel regions to form a plurality of dummy regions.

Preferably, the second retaining wall is made of the same material as the first retaining wall.

Preferably, the dummy area may be sprayed with ink or a pure solution.

The invention has the advantages that: a virtual area is added beside a pixel area of the organic light-emitting pixel array, so that the drying time of the material can be delayed, and the formed film has higher uniformity. In addition, the problem of color mixing caused by dislocation when the inkjet printing process is used for spraying can be solved, and the efficiency of the manufacturing process is improved.

Drawings

The various aspects of the present invention will become more apparent to the reader after reading the detailed description of the invention with reference to the attached drawings. Wherein,

FIG. 1 illustrates a cross-sectional view of an organic light emitting pixel array fabricated in accordance with the prior art;

fig. 2 shows a cross-sectional view of an organic light emitting pixel array fabricated in accordance with the present invention.

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 shows a cross-sectional view of a prior art organic light emitting pixel array. Referring to fig. 1, the organic light emitting pixel array includes a glass substrate 100 and a plurality of pixel regions 1. Wherein, a plurality of pixel regions 1 are located on the glass substrate 100, and each pixel region 1 includes: a pixel electrode 110, an isolation structure 120 and a first retaining wall 130. The pixel electrode 110 is disposed on the glass substrate 100, and the isolation structure 120 is also disposed on the glass substrate 100 and partially covers the edge of the pixel electrode 110. The first retaining wall 130 is located between two adjacent pixel regions 1. When an organic material is sprayed on the pixel region 1 by an inkjet printing process to form a light emitting layer (not shown), the uniformity of the film is affected due to the inconsistent drying time of the material. And misalignment occurs when a luminescent layer or a bank is formed by spraying a material using a nozzle, thereby causing a problem of color mixing.

Fig. 2 shows a cross-sectional view of an organic light emitting pixel array according to the present invention. Referring to fig. 2, the organic light emitting pixel array includes: a glass substrate 200, a pixel region 1 and a dummy region 2. Wherein, pixel region 1 is located on the glass substrate, includes: the pixel electrode 210, the isolation structure 220 and the first retaining wall 230. In this embodiment, the isolation structures 220 are made of inorganic materials, and the first retaining walls 230 are made of organic materials. The pixel electrode 210 and the isolation structure 220 are both located on the glass substrate 200, and the isolation structure 220 partially covers the edge of the pixel electrode 210. The plurality of pixel regions 1 on the glass substrate 200 are defined by a plurality of first bank walls 230. In this embodiment, the organic light emitting pixel array further includes a light emitting layer (not labeled), which is located above the pixel region 1 and formed by spraying an organic material in the pixel region 1 by using an inkjet printing process.

With continued reference to fig. 2, the dummy region 2 is located between two adjacent pixel regions 1, and the dummy region 2 is located between two adjacent first retaining walls 230 of two adjacent pixel regions 1. Thus, when the organic material is sprayed on the pixel region 1 by the nozzle to manufacture the luminescent layer, the ink or the pure solution can be intentionally sprayed on the virtual region 2 to play a buffer role, so as to reduce the non-uniformity of the film caused by the non-uniform drying time of the ink in the spraying process. Moreover, when the light emitting layer and the first retaining wall 230 are formed by spraying materials through the nozzle, misalignment or solution sputtering may occur, so that the dummy region 2 between two adjacent pixel regions 1 may also contain ink or pure solution which is sprayed or sputtered out due to misorientation, thereby avoiding the problem of color mixing between the pixel regions 1. In another embodiment, a second barrier may be disposed between two adjacent pixel regions 1, and the second barrier divides the region between the two adjacent pixel regions into a plurality of dummy regions. The second retaining wall is made of the same material as the first retaining wall and is also made of an organic material.

By adopting the invention, the drying time can be delayed through the virtual area to reduce the nonuniformity of the film caused by the inconsistent ink drying time in the spraying process, and the virtual area can be used for accommodating the sprayed and staggered solution to avoid the color mixing problem caused by the nonuniform film drying time.

Hereinbefore, specific embodiments of the present invention are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present invention without departing from the spirit and scope of the invention. Such modifications and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. An organic light emitting pixel array, comprising:

a glass substrate;

a plurality of pixel regions on the glass substrate, each of the plurality of pixel regions comprising:

a pixel electrode;

the isolation structure is positioned on the glass substrate, and the isolation structure partially covers the edge of the pixel electrode; and

a first retaining wall; and

and the virtual area is positioned between two adjacent pixel areas.

2. The organic light emitting pixel array of claim 1, wherein the isolation structures are made of an inorganic material.

3. The organic light emitting pixel array of claim 1, wherein the first retaining wall is made of an organic material.

4. The organic light emitting pixel array of claim 1, further comprising light emitting layers each disposed over the plurality of pixel regions.

5. The organic light emitting pixel array of claim 4, wherein the light emitting layer is formed by an inkjet printing process.

6. The organic light emitting pixel array of claim 1, wherein the dummy region is located between two adjacent first retaining walls of two adjacent pixel regions.

7. The organic light emitting pixel array of claim 1, wherein a second bank is disposed between two adjacent pixel regions.

8. The organic light emitting pixel array of claim 7, wherein the second barrier separates regions between adjacent pixel regions to form a plurality of the dummy regions.

9. The organic light emitting pixel array of claim 8, wherein the second retaining wall is made of the same material as the first retaining wall.

10. The organic light emitting pixel array of claim 1, wherein the dummy regions may be ink or clear solution sprayed.