Transfer printing template and micro light emitting diode transfer printing device
A technology of micro light-emitting diodes and templates, applied in transfer printing, rotary printing presses, printing and other directions, can solve the problems of poor, complex structure, difficult peeling effect, etc., and achieve the effect of high transfer efficiency and simple structure
Active Publication Date: 2019-01-11
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
[0005] However, the current transfer printing generally uses energized adsorption or PDMS adhesion for transfer printing. When using PDMS for peeling, it is difficult to control the peeling effect; when using energized adsorption, it is necessary to conduct conduction on each adsorption head, not only Complicated and the peeling effect is not good; there is currently a technology for transferring micro-LEDs through temperature control. The principle is to use low-temperature peeling glue, and the transfer process is divided into adsorption-transfer-cooling and finally complete the transfer. The above two transfer methods are not only complex in structure, but also low in efficiency
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0023] like figure 1 and figure 2 As shown, the transfer template 14 of the present invention includes a plate-shaped transfer substrate 1, on one side surface of the transfer substrate 1, protrusions 2 are evenly arrayed, on the surface of the protrusions 2 and between the protrusions 2 The gap is covered with a temperature-controlled adhesive 3 that changes the viscosity of the colloid as the temperature changes. The temperature-controlled adhesive 3 can be a low-temperature peel-off type temperature-controlled adhesive. When the temperature is between 20-60°C, the colloid loses its viscosity and can be peeled off.
[0024] Specifically, the shape of the protrusions 2 is rectangular, and its surface size is adapted to the size of the micro-light emitting diodes on the supply substrate 11; the distance between the protrusions 2 is equal, sp...
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A transfer printing template (14), comprising a transfer substrate (1). A surface on one side of the transfer substrate is provided with protrusions (2) arranged in a uniform array. A heat sensitive adhesive (3) having an adhesiveness varying with the temperature is coated on surfaces of the protrusions and gaps between the protrusions. Also provided is a transfer printing device for micro light emitting diodes. The transfer printing device comprises a frame (4) provided with a transfer waiting platform (5) and a transfer platform (6) adjacent to the transfer waiting platform. A transfer mechanism (7) movable from the transfer waiting platform to the transfer platform and vertically movable is provided above the frame. The transfer printing template (14) is disposed on the transfer mechanism, and the protrusions are oppositely arranged with respect to the transfer waiting platform (5) and the transfer platform (6). A heating device (9) for heating the transfer printing template is further provided on the transfer mechanism. The transfer printing template (14) is fastened to a heating surface of the heating device (9) by means of a fastener. A cooling device (10) is provided in the transfer platform. The transfer printing device achieves transfer printing of micro light emitting diodes by means of temperature control, thus providing the advantages of a simple structure and high transfer printing efficiency.
Description
technical field [0001] The invention relates to the technical field of micro-light-emitting diode display, in particular to a micro-light-emitting diode transfer device. Background technique [0002] Flat panel display devices are widely used in various consumer electronics such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers due to their advantages of high image quality, power saving, thin body, and wide application range. products, becoming the mainstream of display devices. [0003] A Micro LED (μLED) display is a display that uses a high-density micro-sized LED array integrated on a substrate as display pixels to display images. Like a large-size outdoor LED display, each pixel Addressable and individually driven to light up, it can be regarded as a reduced version of the outdoor LED display, reducing the pixel distance from millimeters to microns. μLED displays are the same as Organic Light-Emitting...
Claims
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IPC IPC(8): B41F16/00
CPCB41F16/00
Inventor 陈黎暄
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD