JP2007173199A - Manufacturing method of pixel for display or organic electronic member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of pixel for display or organic electronic member. <P>SOLUTION: Insulation material 23 in a form of ink is applied on two sides of pixels simply in vertical direction or lateral direction. The arraying direction of the insulation material is vertical to that of anodes made of ITO (Indium Tin-doped Oxide) painted on a transparent glass substrate, namely, the pixels are not surrounded at four sides. Since the pixels can be formed into continuous rows or columns when the pixels are formed by an ink-jet process, the thickness of each pixel can be uniformized comparing with conventional method ink-jetting at every single pixel, and brightness of light emission of the display can be uniformized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pixel display method for a flat display using organic polymer light emitting diodes or organic electronic components thereof, and in the manufacturing process, an insulating material is formed in the form of liquid ink in the vertical or horizontal direction and parallel to two sides of the pixel. The insulating material is arranged as an isolation layer. The insulating material is arranged in the direction perpendicular to the anode arrangement direction formed by ITO (Indium Tin-doped Oxide) coated on the transparent glass substrate, and surrounds the four sides of the pixel. No structure. When forming pixels by an inkjet process, it is possible to form rows or columns as a series of structures, each in a known manner, compared to forming individual pixels by inkjet printing individually. The pixels are formed sufficiently uniformly, and the luminous intensity of the display can be made uniform. The arrangement direction of the insulating material is formed in a direction parallel to the cathode, and the pixels are directly formed on the surface of the anode, ensuring a non-defective product rate in the manufacture of display pixels, and improving the light emitting area and uniformity of each pixel. The present invention relates to a pixel manufacturing method for a display or an organic electronic member.

In the manufacturing process of the face plate of the display, as shown in FIGS. 1 and 2, the pixel display structure is coated with ITO 12 (Indium Tin-doped Oxide) on the transparent glass substrate 10 in the pixel display area. Since ITO is transparent and has conductive properties, it is possible to impart conductivity to the non-conductive glass substrate 10, thereby forming a pixel capable of emitting light. An isolation region is formed between the pixels using an insulating material 11 so that a short circuit does not occur between the pixels due to a problem in the manufacturing process. In this manufacturing process, the insulator 11 is disposed around the pixel. It is necessary to form in a shape that overlaps the region, and it is precisely matched in the manufacturing process by ink jet in the subsequent pixel region, however, there are the following problems.

  First, if the area of the pixel display region 13 is reduced, there is a problem that the luminous intensity of the display is insufficient.

  Second, an insulating material is formed so as to protrude from the four sides of the effective pixel, and when the pixel is formed by inkjet, a phenomenon occurs in which the central region is relatively thick and the periphery is relatively thin due to the surface tension of the liquid ink 14. A phenomenon occurs in which the light emission of the display becomes uneven.

In order to improve the above-mentioned drawbacks, the pixel production method and structure of the display or organic electronic member proposed by the present invention can effectively improve the known defect and non-uniformity of the pixel light emission effect.
JP 2004-95562 A JP 2004-152746 A

In order to solve the above-described problems in the known technology, the present invention provides an insulating material in the form of liquid ink in the vertical or horizontal direction parallel to two sides of a pixel in a manufacturing process of a pixel manufacturing method for a display or an organic electronic member. Formed as a continuous layer. When the insulating material is formed by the inkjet process in a form that does not surround the four sides of the pixel, perpendicular to the direction of the anode formed by ITO (Indium Tin-doped Oxide) coated on the transparent glass substrate Unlike the case where a single pixel in the known technology is used as an inkjet unit, each pixel is formed sufficiently uniformly, so that the luminous intensity of the display is equalized. be able to.
The arrangement direction of the insulating material is formed in a direction parallel to the cathode, the pixel is formed by continuous injection on the anode surface using an inkjet device, the insulating material is formed by isolating two mutually adjacent cathodes, An object is to secure a non-defective product rate in pixel manufacture of a display and to improve a light emitting area and uniformity of each pixel.

In the present invention, furthermore, the arrangement direction of the insulating material described above is perpendicular to the arrangement direction of the anode formed by ITO (Indium Tin-doped Oxide) coated on the transparent glass substrate, and is formed above the pixel. The cathode material forms an electrical connection, and by making each pixel brighter, pixel deterioration occurs due to the potential difference between multiple pixels, but this is prevented by adding a ground circuit in the circuit from the anode to the cathode of the pixel. To do. The ground circuit is made up of ITO to simplify the manufacturing process. However, the ground circuit is located between the two anodes, and the current of the high-potential pixel flows toward the ground circuit, causing damage to the low-potential pixel. Prevent the occurrence of deterioration.

According to the first aspect of the present invention, an insulating material is used in the manufacturing process, and liquid ink is installed in a single vertical direction or a horizontal direction in parallel to two sides of the pixel. The arrangement direction of the insulating material is perpendicular to the arrangement direction of the anode. The arrangement direction of the insulating material is parallel to the direction in which the cathode is formed, and the pixel forms a thin film on the anode surface by an ink jet continuous injection method, thereby ensuring a non-defective rate in the display pixel manufacturing process. A method of manufacturing a pixel of a display or an organic electronic member, characterized in that its light emitting area and uniformity are increased.

According to a second aspect of the present invention, there is provided a pixel manufacturing method for a display or an organic electronic member according to the first aspect, wherein the cathode is formed on a surface layer of the pixel.

A third aspect of the invention is the display or organic electronic member pixel manufacturing method according to the first or second aspect, wherein the cathode is formed by vapor deposition.

According to a fourth aspect of the present invention, there is provided the display or the organic electronic member pixel fabrication according to the first aspect, wherein the anode is formed by ITO (Indium Tin-doped Oxide) coated on a transparent glass substrate. Is the method.

The invention of claim 5 is characterized in that the insulating material can be composed of a photoresist, and the photoresist formed by a patterning process of exposure / development forms an insulating material. It is a pixel manufacturing method of a display or an organic electronic member.

A sixth aspect of the present invention is the display or organic electronic member pixel manufacturing method according to the first aspect, wherein the insulating material electrically separates the cathode.

According to a seventh aspect of the present invention, in the pixel manufacturing method for a display or an organic electronic member according to the first aspect, the pixels of the display are composed of polymer light emitting diodes (PLEDs). is there.

The invention according to claim 8 is the method of manufacturing a pixel of a display or an organic electronic member according to claim 1, wherein the method of arranging the pixels is in one line.

A ninth aspect of the invention is the display or organic electronic member pixel manufacturing method according to the first aspect, wherein the pixel arrangement method is rectangular.

In the tenth aspect of the present invention, a ground circuit is added between the circuit from the anode to the cathode of the pixel, the ground position of the ground circuit is between the two anodes, and the current of the high-potential pixel flows toward the ground circuit. A method for preventing pixel deterioration of a display or an organic electronic member, characterized by preventing deterioration of consumption of low-potential pixels.

The invention of claim 11 is characterized in that the anode is formed by applying ITO (Indium Tin-doped Oxide) on a glass substrate, and the pixel deterioration preventing method of the display or organic electronic member according to claim 10 It is.

A twelfth aspect of the present invention is the display or organic electronic member pixel deterioration preventing method according to the tenth aspect, wherein the ground circuit is made of ITO (Indium Tin-doped Oxide).

The present invention is a pixel manufacturing method for a display or an organic electronic member, and in the manufacturing process, an insulating material is continuously arranged in the form of liquid ink in the vertical direction or the horizontal direction in parallel to the two sides of the pixel. The alignment direction of the material is perpendicular to the alignment direction of the anode formed by ITO (Indium Tin-doped Oxide) coated on the transparent glass substrate, and does not surround the four sides of the pixel. Alternatively, a column can be a unit of work, and since a single pixel is not an inkjet unit as in the known technique, each pixel is formed sufficiently uniformly, and the luminous intensity of the display is made uniform. be able to. The arrangement direction of the insulating material is formed in a direction parallel to the cathode, the pixel is continuously formed on the anode surface using an ink jet device, the insulating material is formed by isolating two mutually adjacent cathodes, and the display The non-defective product rate in the pixel manufacturing is ensured, and the light emitting area and uniformity of each pixel are improved.

The present invention further provides a cathode formed above the pixel, wherein the arrangement direction of the insulating material is perpendicular to the arrangement direction of the anode formed by ITO (Indium Tin-doped Oxide) coated on the transparent glass substrate. When the material forms an electrical connection and the brightness of each pixel is increased, a pixel deterioration phenomenon occurs due to a potential difference between a plurality of pixels, but a ground circuit is added in a circuit from the anode to the cathode of the pixel. The ground circuit can be made of ITO to simplify the manufacturing process. The ground circuit is installed between two anodes, and the current of the high-potential pixel flows toward the ground circuit. Occurrence of damage deterioration of the potential pixel is prevented.

The technical means employed by the present invention and the structure thereof to achieve the above-described objects and effects will be described below with reference to the drawings and embodiments.

As shown in FIGS. 2 and 3, the light emitter of the flat display (panel) is composed of PLED (polymer light-emitting diode), and the display has a self-luminous property, so that it is extremely suitable as a light-emitting panel of the display. Power saving and good luminance. The manufacturing process of the present invention is not limited to such a display manufacturing process, and the technical means of the present invention can be applied to a manufacturing method of an organic electronic member.
The technical means is that in the manufacturing process, the isolation region made of the insulator 23 in the form of liquid ink is formed in two rows parallel to the row of the pixels 22 in the vertical direction or the horizontal direction. Can be electrically isolated. The arrangement direction of the insulating material 23 is perpendicular to the arrangement direction of the anode formed by the ITO 21 coated on the transparent glass substrate 20 and does not surround the four sides of the pixel 22.
When an inkjet process is performed for pixel formation using an inkjet apparatus, the pixels are formed as continuous rows or columns. For example, the first ink jet forms red pixels 22 in the row direction, the second ink jet forms green pixels 22 in the row direction, and the third ink jet forms blue pixels 22 in the row direction. The production of the pixels 22 for all three primary colors is completed. Unlike the known technique, each pixel 22 is formed sufficiently evenly because the single pixel is not used as a unit for inkjet printing, and the center of the pixel does not protrude and the thickness does not differ from the surrounding due to the influence of surface tension. The luminous intensity of the display can be made uniform. Further, since the arrangement direction of the insulators 23 is formed in parallel with the cathode 24, the insulating material 23 can isolate the two adjacent cathodes 24 even if the pixels 22 are directly formed on the surface of the anode (ITO 21). It becomes a layer, and while ensuring the non-defective rate of the pixel manufacturing process of a display, the light emission area and uniformity of each pixel 22 can be improved.
As the insulating material 23 described above, a photoresist can be used, and the insulating material 23 can be formed as a photoresist pattern formed by a patterning process through a process of exposure and development.

The insulating material 23 described above is configured as a continuous row or column that not only can isolate the pixels 22 of different colors, but can also separate the cathode (Cathode Separator, CS), and through the plating scheme, The cathode 24 can be formed on the surface, and the pixel manufacturing process is simplified by adopting a configuration in which each pixel 22 is made conductive by forming an electrical connection with the anode formed by the ITO 21 below the pixel 22.

As shown in FIG. 5, the arrangement method of the plurality of pixels 22 can be applied to the light source of the scanner as a structure arranged in a line, and can be replaced with a light source by a known cold cathode fluorescent lamp (CCFL). I can do it.
Such a light source has power saving and high brightness, and an insulating material 23 made of a photoresist is provided on both upper and lower sides of a row of pixels 22 to perform a process of forming the pixels by ink jetting. Therefore, the advantage of low cost can be exhibited in the manufacture of the light source of the scanner.

As shown in FIG. 6, the arrangement method of the plurality of pixels 22 is arranged in a rectangular shape, and an insulating material 23 made of a photoresist is provided on both upper and lower sides of the rectangle, and is determined in advance. When performing the process of forming the pixels 22 with a plurality of ink jets at intervals, the liquid ink 25 does not necessarily correspond to the center position of each pixel 22, but the liquid ink 25 still flows and diffuses. By this phenomenon, all the pixel area sections can be filled. Comparing these with FIG. 3 described above, this embodiment has advantages that the manufacturing process can be speeded up and the amount of the insulating material 23 to be installed can be reduced.

In the example shown in FIG. 7, a plurality of pixels are displayed in an “A” shape, but one pixel is lit in a region surrounded by a broken line, and the lit pixel is in a high potential state. However, since the pixels adjacent to each other are not lit, they are in a low potential state. Therefore, the high potential pixel 31 generates a “leakage phenomenon”, and the current is high as shown in FIG. The current flows from the high potential anode 311 toward the cathode 33, and further flows from the cathode 33 toward the low potential anode 321 of the low potential pixel 32. Therefore, as shown in FIG. As a result, the influence of the potential difference between the high potential and the low potential pixel becomes large over a long period of time, and a deterioration phenomenon occurs in the low potential pixel, but there is no countermeasure for prevention control.

As shown in FIG. 10, the arrangement direction of the insulating material described in FIGS. 3 and 4 is perpendicular to the arrangement direction of the anode formed by the coating ITO on the transparent substrate, and is electrically connected to the cathode material formed above the pixel 51. The pixel degradation phenomenon is caused by the potential difference between the plurality of pixels 51. However, the pixel degradation prevention method of the present invention is performed from the anode of the pixel 51 to the cathode. The ground circuit 52 is added between the circuits to reach.
Since the ground circuit 52 is made of ITO, the manufacturing process can be simplified and the cost can be reduced. The ground circuit 52 is installed between two anodes, and each pixel 51 is connected to the ground circuit so that the current of the high potential pixel flows toward the ground circuit and does not flow directly to the low potential pixel. The pixel 51 is protected from being worn out and deteriorated.

In the present invention, preferred embodiments have been disclosed as described above. However, the present invention is not limited to the present invention, and any person who is familiar with the technology can use various methods within the spirit and scope of the present invention. Variations and moist colors can be added, so the protection scope of the present invention is based on what is specified in the claims.

It is a top view of the pixel formation structure of a well-known display. It is sectional drawing of the pixel formation structure of a well-known display. It is explanatory drawing of the pixel formation structure of the display of this invention. It is explanatory drawing of the cathode structure which installed the metal layer of the display of this invention. It is explanatory drawing of the structure which the pixel of this invention forms in 1 row. It is explanatory drawing of the matrix structure which the pixel of the display of this invention forms. It is explanatory drawing of the electrical potential difference which a pixel forms after the pixel of the display of this invention forms a corresponding figure. It is explanatory drawing of the structure where the pixel of the display of this invention forms degradation damage of a pixel by an electrical potential difference. It is explanatory drawing of the structure where the pixel of the display of this invention forms degradation damage of a pixel by an electrical potential difference. It is explanatory drawing of the structure which added the installation circuit in the circuit from the anode of the display of this invention to the cathode.

Explanation of symbols

10 Glass substrate 11 Insulating material 12 ITO (Indium tin compound)
13 Pixel display area 14 Liquid ink 15 Inkjet device 20 Glass substrate 21 ITO (indium tin compound)
22 pixel 23 insulating material 24 cathode 25 liquid ink 31 high potential pixel 311 high potential anode 32 low potential pixel 321 low potential anode 33 cathode 41 normal pixel 42 damaged pixel 51 pixel 52 installation circuit

Claims (12)

An insulating material is formed in a single vertical direction or a horizontal direction parallel to two sides of the pixel, and the arrangement direction of the insulating material is perpendicular to the arrangement direction of the anode and parallel to the direction in which the cathode is formed. A method of manufacturing a pixel for a display or an organic electronic member, wherein the pixel is formed as a thin film on the anode surface by a continuous ink jet method in the form of liquid ink. 2. The display or organic electronic member pixel manufacturing method according to claim 1, wherein the cathode is formed on a surface layer of the pixel. 3. The display or organic electronic member pixel manufacturing method according to claim 1, wherein the cathode is formed by vapor deposition. The display or organic electronic member pixel manufacturing method according to claim 1, wherein the anode is formed of ITO (Indium Tin-doped Oxide) coated on a transparent glass substrate. The display or organic electronic member pixel manufacturing method according to claim 1, wherein the insulating material is a photoresist, and is formed by patterning by exposure and development. The display or organic electronic member pixel manufacturing method according to claim 1, wherein the insulating material isolates the cathodes from each other. The method for manufacturing a pixel of a display or an organic electronic member according to claim 1, wherein the pixel is composed of a polymer light emitting diode (PLED). The method of manufacturing a pixel of a display or an organic electronic member according to claim 1, wherein the method of arranging the pixels is in a line. The method for manufacturing a pixel of a display or an organic electronic member according to claim 1, wherein the pixel arrangement method is rectangular. A grounding circuit is added between the circuit from the anode to the cathode of the pixel, and the grounding position of the grounding circuit is between the two anodes. The current of the high potential pixel flows toward the grounding circuit, and the consumption of the low potential pixel is deteriorated. A method for preventing pixel deterioration of a display or an organic electronic member, characterized in that The method of claim 10, wherein the anode is configured by applying ITO (Indium Tin-doped Oxide) on a glass substrate. The method for preventing pixel deterioration of a display or an organic electronic member according to claim 10, wherein the ground circuit is made of ITO (Indium Tin-doped Oxide).

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