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OLED substrate and preparation method and display device thereof

A substrate and substrate technology, used in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., can solve the problems of luminescent layer material deposition, lowering the resolution of OLED substrates, color mixing, etc., to reduce the distance and achieve better display effects. , the effect of increasing the resolution

Inactive Publication Date: 2018-06-29
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the inventors found that the above-mentioned method for preparing the OLED substrate has the following problems: since the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region are simultaneously formed on the OLED substrate, the three sub-pixel regions are respectively During the evaporation process, if the distance between the three sub-pixel regions is small, it is easy to cause the material of the light-emitting layer of one color to be deposited on the sub-pixel region of another color, thereby causing color mixing; if the distance between the three sub-pixel regions If the distance between them is large, the resolution of the OLED substrate prepared by the above preparation method will be reduced.

Method used

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  • OLED substrate and preparation method and display device thereof
  • OLED substrate and preparation method and display device thereof
  • OLED substrate and preparation method and display device thereof

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Embodiment 1

[0038] Such as figure 1 As shown, the present embodiment provides a method for preparing an OLED substrate, comprising the following steps: forming a pixel defining layer 2 on a substrate 1, and forming an accommodating portion 8 of an OLED device of one color in the pixel defining layer 2; In the container part 8 formed in the step, the light emitting layer 3, the cathode layer 4, and the encapsulation layer 5 arranged in sequence along the direction away from the substrate 1 are formed; according to the above steps, the container parts of OLED devices of other colors are formed in the pixel definition layer 2 one by one 8; and, after forming the containing portion 8 of the OLED device of one color, in the formed containing portion 8, the light emitting layer 3, the cathode layer 4, and the encapsulating layer 5 of the OLED device of the color are sequentially formed.

[0039] Further, the preparation method of the OLED substrate in this embodiment also includes: after formin...

Embodiment 2

[0042] Such as figure 2 As shown, the present embodiment provides a method for preparing an OLED substrate, which includes the following steps:

[0043] Step 1, forming a pixel driving circuit on the substrate 1 .

[0044] Specifically, on the substrate 1 , various layer structures including switching transistors, driving transistors, storage capacitors and other elements are formed through a patterning process to form a pixel driving circuit.

[0045] Step 2: On the substrate 1 after the above step 1, the anode layer of each OLED device is formed by a patterning process.

[0046] It should be noted that the anode layer of each OLED device is connected to the drain of the driving transistor of the corresponding pixel driving circuit. Usually, it is necessary to form an interlayer insulating layer on each layer structure of the formed pixel driving circuit, and etch the interlayer insulating layer to form a via hole 9 for connecting the drain of the driving transistor of the...

Embodiment 3

[0061] Such as image 3 As shown, this embodiment provides an OLED substrate, which can be prepared by the method for preparing the OLED substrate provided in Embodiment 1 or Embodiment 2. Wherein, the OLED substrate comprises: a substrate 1; a pixel defining layer 2, in which an accommodating portion 8 is arranged; along a direction away from the substrate 1, the light-emitting layer 3 and the cathode layer of the OLED device arranged sequentially in the accommodating portion 8 4. Encapsulation layer 5; wherein, the cathode layer 4 and the encapsulation layer 5 of each OLED device are independently arranged and disconnected from each other, so as to protect the light emitting layer 3, so as to prevent the formation of a certain color light emitting layer 3 , contaminate already formed luminescent layers 3 of other colors.

[0062] Among them, such as Figure 4 As shown, preferably in the present embodiment, the OLED substrate further includes: a protective layer 6, which is...

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Abstract

The invention provides an OLED substrate and a preparation method and a display device thereof, which belongs to the technical display field. The preparation method comprises the following steps: a pixel limiting layer is formed on a substrate and a container of a color OLED device is formed in the pixel limiting layer; in the container mentioned above, a luminous layer, a cathode layer and a package layer are sequentially formed which are arranged along the direction away from the substrate. In accordance with the steps, containers of OLED devices are formed in the pixel limiting layer. Besides, after each forming of one color of the OLED device, the luminous layer, the cathode layer and the package layer of the OLED device of one certain color are formed in the container.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to an OLED substrate, a preparation method thereof, and a display device. Background technique [0002] In the prior art, the preparation process of the OLED (Organic Light-Emitting Diode; Organic Light-Emitting Diode) substrate is as follows: First, the base of the OLED substrate is exposed, developed, and etched to simultaneously form red sub-pixel regions and green sub-pixels. area, the blue sub-pixel area; then, the three sub-pixel areas are vapor-deposited, so that the red sub-pixel area is deposited with a red light-emitting layer material, the green sub-pixel area is deposited with a green light-emitting layer material, and the blue sub-pixel area is deposited with a green light-emitting layer material. A blue light-emitting layer material is deposited in the pixel area to form an OLED substrate. [0003] However, the inventors found that the above-mentioned met...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L51/52H01L51/56
CPCH10K59/122H10K50/844H10K71/00
Inventor 周婷婷张斌羊振中
Owner BOE TECH GRP CO LTD