Inorganic flexible LED color display screen and preparation method
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A color display, flexible technology, applied in the direction of identification devices, instruments, etc., can solve the problems of poor visibility, complex process, reduced rollability, etc., to overcome the bottleneck of preparation, high wiring density, and rollability. Good results
Inactive Publication Date: 2018-10-09
EAST CHINA NORMAL UNIV
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Problems solved by technology
At present, in the research field of flexible transparent displays, the main research objects are focused on OLED, LCD, EPD and LED. The existing problems are that OLED transparent displays have a short lifespan and high price, and are not suitable for large-area displays. The display screen is used, and at the same time, its visibility is poor in a high-brightness environment; it is difficult for LCD to make a transparent flexible display screen that can be bent at will, and the traditional backlight source cannot be used in LCD transparent display screens; the technology of EPD products is not enough Mature, volume products are not yet on the market
[0003] The research on flexible display screens is being accelerated in the prior art. Due to the material selection and thickness of the insulating layer and electrode layer, it is difficult to reduce the thickness of the multi-layered display screen, increase the wiring density, reduce the rollability and complicate the process. , high cost defects
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Embodiment 1
[0031] refer to Figure 1-3 , the preparation of the present invention comprises the following specific steps:
[0032] Step 1. Make the flexible circuit board
[0033] The flexible circuit board is composed of a base layer 4, a multi-layer insulating layer 12 and a multi-layer electrode layer, the base layer 4 is the bottom layer, and the insulating layer 12 and the electrode layer are alternately arranged on the base layer;
[0034] 1.1. Prepare the base layer: use PET polyester board, coat a layer of indium tin oxide (ITO), fluorine-doped tin oxide (FTO) or zinc oxide (ZnO) conductive film on the board, and etch it by laser The process etches the plating coating into a common circuit, arranges LED pads 11 in X rows and E columns on the other side of the board, and arranges the common circuit lead-out lines X1~Xn and electrode terminals in X rows, and the shared circuit Connect to the common end of the LED pad 11 to complete the preparation of the base layer;
[0035] 1.2...
Embodiment 2
[0048] refer to Figure 1-3 , the preparation of the present invention comprises the following specific steps:
[0049] Step 1. Make the flexible circuit board
[0050] The flexible circuit board is composed of a base layer 4, a multi-layer insulating layer 12 and a multi-layer electrode layer, the base layer 4 is the bottom layer, and the insulating layer 12 and the electrode layer are alternately arranged on the base layer;
[0051] 1.1. Preparation of base layer: select PI polyimide board, coat a layer of indium tin oxide (ITO), fluorine-doped tin oxide (FTO) or zinc oxide (ZnO) conductive film on the board, and pass laser The etching process etches the plated coating into a common circuit, arranges LED pads 11 in X rows and E columns on the other side of the board, and arranges common circuit lead-out lines X1 to Xn and electrode terminals in X rows, The common circuit is connected to the common end of the LED pad 11 to complete the preparation of the base layer;
[005...
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Abstract
The invention discloses an inorganic flexible LED color display screen and a preparation method. The preparation method comprises the following steps: forming a flexible circuit board by using a layerof a basic layer, multiple layers of insulating layers and multiple layers of electrode layers, wherein the basic layer is a bottom layer, and successively and alternately installing the insulating layers and the electrode layers on the basic layer; selecting PET polyester plate or PI polyimide plate, plating a layer of a conducting film on the plate, etching a common circuit to prepare the basiclayer through a laser; using PI polyimide solution, and preparing the insulating layers by using silk-screen printing; using conducting ink containing nano-silver carbon, and preparing the electrodelayers by using 3D ink-jet printing; and finally, pasting an LED light-emitting device on the flexible circuit board by using a chip mounter, and covering by a protecting layer prepared by transparentflexible protecting glue. The display has the characteristics of good flexibility, light weight of a finished product, convenient installation, and small influence to luminescence uniformity and visual effect after curled. The preparation method is capable of overcoming a bottleneck of large-scale display screen preparation, and guaranteeing the preparation of the inorganic flexible LED color display screen.
Description
technical field [0001] The invention relates to the technical field of transparent or transparent flexible compound circuit and LED flexible display, in particular to a color display screen compounded with an inorganic LED light-emitting device and a multi-layer transparent or flexible transparent conductive circuit and a preparation method thereof. Background technique [0002] With the development of electronic science and technology, display technologies such as PDP, LCD, and LED are becoming more and more mature, and different displays occupy different application markets. For example, liquid crystal display is mainly concentrated in the indoor small and medium-sized display market; OLED is concentrated in the market fields such as mobile display and special-shaped display due to its low energy consumption; traditional inorganic LED displays are widely used in various large-sized indoor and outdoor displays. show. With the advent of the data and information age, there a...
Claims
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Application Information
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