CN-122006939-A - Device and method for preparing full-color display LED device by narrow-band red-green fluorescent powder

CN122006939ACN 122006939 ACN122006939 ACN 122006939ACN-122006939-A

Abstract

The invention relates to the technical field of semiconductor display preparation, and particularly provides a device and a method for preparing a full-color display LED device of narrow-band red-green fluorescent powder. The preparation device comprises a working platform and a recovery mechanism, wherein the top of the working platform is provided with a clamping mechanism, the clamping mechanism is used for forming a clamping space above the top surface of the working platform, a fluorescent powder slurry component is arranged above the working platform and comprises two vertically downward feeding pipes arranged in the clamping space, the discharge end of each feeding pipe is fixedly provided with a dual-purpose spraying seat, the dual-purpose spraying seats are close to the top surface of the working platform, the recovery mechanism comprises two recovery pipes arranged in the clamping space, electrostatic adsorption plates are arranged on the clamping surface of the clamping mechanism, the electrostatic adsorption plates are respectively made of electrostatic adsorption materials, and the clamping mechanism drives the electrostatic adsorption plates to be close to the suction seats, so that the recovery of the slurry left on two sides is realized.

Inventors

CHEN BENLIANG
ZHU ZHIHENG
SUN LING
WANG KAI
WANG JUN
GUO WEI
HE SHIMING
ZHANG CHANGQING
GONG YONG

Assignees

今上半导体(信阳)有限公司
上贝光电(信阳)有限公司
今上光电(信阳)有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (8)

1. A full-color display LED device preparation device of narrow-band red and green fluorescent powder is characterized by comprising a working platform (1) and a recycling mechanism, wherein a clamping mechanism (2) is arranged at the top of the working platform (1), the clamping mechanism (2) forms a clamping space (3) based on the upper side of the top surface of the working platform (1), a fluorescent powder slurry component (5) is arranged above the working platform (1), the fluorescent powder slurry component (5) comprises two vertically downward-arranged material pipes (6) based on the clamping space (3), the discharge ends of the two material pipes (6) are fixedly provided with a double-purpose spray seat (7), the double-purpose spray seat (7) is close to the top surface of the working platform (1), the recycling mechanism comprises two recycling pipes (8) which are arranged in the clamping space (3) based on the space between the two material pipes (6), the two recycling pipes (8) are respectively parallel to the inner sides of one material pipe (6), a recycling pipe (8) and the material pipe (6) on the outer sides are connected with a recycling pipe (9), the recycling pipe (8) is fixedly provided with a recycling pipe (9) through the recycling pipe (9), the recycling pipe (9) is far away from the top surface (11) of the working platform, and is far away from the top surface (11), the two-purpose spraying seats (7) are shared by the recycling channels and the material pipes (6) connected with the two-purpose spraying seats (7), the two-purpose spraying seats are used for recycling waste powder sucked through the suction seats (11) and the recycling channels to the outside of the working platform (1) through the two-purpose spraying seats (7), and the two-purpose spraying seats are used for spraying powder provided by spraying equipment into the material pipes (6) to the surface of a workpiece in the clamping space (3).
2. The device for preparing the full-color display LED device with the narrow-band red and green fluorescent powder according to claim 1, wherein the recycling mechanism further comprises electrostatic adsorption plates (12) fixed on two clamping surfaces of the clamping mechanism (2), the electrostatic adsorption plates (12) of one clamping surface are opposite to the inside and outside of a spraying area of the corresponding dual-purpose spraying seat (7), the electrostatic adsorption plates (12) of the other clamping surface are corresponding to the spraying surface of the corresponding other dual-purpose spraying seat (7) to realize bidirectional spraying and adsorption actions, the adsorption surfaces of the electrostatic adsorption plates (12) are corresponding to the adsorption surfaces of the suction seat (11), the electrostatic adsorption plates (12) move relative to the suction seat (11) when the clamping actions are carried out, one end of the working platform (1) is fixedly provided with a stand column (13), the top end of the stand column (13) is fixedly provided with a first electric cylinder (14), an action rod of the first electric cylinder (14) is vertically downward, a Z-direction adjusting arm (15) is fixedly arranged, the Z-direction adjusting arm (15) horizontally extends to the working arm (16) along the Z-direction adjusting direction, the Z-direction adjusting arm (16) is arranged in a direction, the Z-direction adjusting arm (16) is symmetrically extends along the two ends of the Z-direction adjusting arm (16), and the Z-direction adjusting arm (16) is arranged along the Z-direction adjusting arm (16), two material pipes (6) are respectively fixed at two ends of the X-direction adjusting arm (17), a connecting plate (4) is jointly fixed at the top end of the two recovery pipes (8), a telescopic rod (10) is connected at the top end of the connecting plate (4), and the top end of the telescopic rod (10) is fixedly connected with the bottom surface of the Z-direction adjusting arm (15).
3. The full-color display LED device manufacturing apparatus of the narrow-band red-green phosphor according to claim 2, wherein the circulation pipe (9) is provided with a solenoid valve (18).
4. The device for preparing a full-color display LED device with the narrow-band red-green fluorescent powder according to claim 3, wherein the clamping mechanism (2) comprises two second electric cylinders (19) fixed at two ends of the working platform (1) in the Y direction and clamping seats (20) respectively fixed on action bars of the two second electric cylinders (19), and the two electrostatic adsorption plates (12) are respectively fixed on clamping surfaces of the two clamping seats (20).
5. The device for preparing the full-color display LED device of the narrow-band red-green fluorescent powder according to claim 4, wherein moving tracks (21) are formed on two sides of the Z-direction adjusting arm (15) along the length direction of the Z-direction adjusting arm, and two ends of the X-direction adjusting arm (17) penetrate through the two moving tracks (21) to reach the outside and are guided with the moving tracks (21) through rollers.
6. The device for preparing the full-color display LED device with the narrow-band red-green fluorescent powder according to claim 5, wherein the length dimension of the suction seat (11) is set according to the movement stroke of the X-direction adjusting arm (17), and the length dimension of the electrostatic suction plate (12) is set according to the movement stroke of the X-direction adjusting arm (17).
7. The device for preparing the full-color display LED device by using the narrow-band red-green fluorescent powder according to claim 6, wherein a gear (22) is installed in the middle of one end of the working platform (1) far away from the upright post (13), racks (23) are fixed on two clamping bases (20), the two clamping bases are arranged up and down, and tooth surfaces of the two racks (23) vertically correspond to and are meshed with the upper side and the lower side of the gear (22).
8. A method for preparing a full-color display LED device with narrow-band red-green phosphor, which adopts the full-color display LED device preparation device with narrow-band red-green phosphor according to claim 7, comprising the following steps: s01, placing a strip-shaped LED chip in the clamping space (3) of the working platform (1), and locking and positioning the strip-shaped LED chip in the clamping space (3) through the clamping mechanism (2); s02, an electromagnetic valve (18) on the circulating pipe (9) enables the recycling channel to be in a cut-off state, a spraying device is started, red fluorescent powder slurry and green fluorescent powder slurry are respectively conveyed to a dual-purpose spraying seat (7) through the corresponding material pipe (6), and red fluorescent powder strips and green fluorescent powder strips are respectively formed by coating on two sides of the top surface of the strip-shaped LED chip; In the spraying process, the splashing slurry and the residual slurry which are not adhered to the strip-shaped LED chips are respectively adsorbed on the adsorption surface of the suction seat (11) and the surface of the electrostatic adsorption plate (12) on the clamping mechanism (2); s04, after the spraying is finished, opening the electromagnetic valve (18) to enable the recycling channel to be conducted, stopping supplying fluorescent powder slurry to the material pipe (6), and only introducing high-pressure gas to the material pipe (6); And S05, discharging residual slurry adsorbed on the electrostatic adsorption plate (12) and the adsorption surface of the suction seat (11) to the outside of the equipment through the dual-purpose spraying seat (7) through the suction seat (11).

Description

Device and method for preparing full-color display LED device by narrow-band red-green fluorescent powder Technical Field The invention relates to the technical field of semiconductor display preparation, in particular to a device and a method for preparing a full-color display LED device of narrow-band red-green fluorescent powder. Background In the field of high-color-gamut display device preparation, a RGB pixel unit is formed by combining narrow-band red light, green light fluorescent powder and a blue light LED chip, and the method is a main flow technical route for realizing high-color-purity and wide-color-gamut display. The existing LED fluorescent powder coating process adopts a dispensing, spraying or ink-jet mode, fluorescent powder slurry is directly coated on the surface of a chip, and then the full-color light-emitting device is formed through solidification and encapsulation. The existing preparation device has the defects of mutually independent spraying and recycling mechanisms, complex structure and large occupied space, and the splashed fluorescent powder slurry is easy to adhere to the periphery of a nozzle and a clamping part during spraying, difficult to clean thoroughly and poor in coordination performance of adsorption and clamping functions. Disclosure of Invention In order to solve the problems, the invention provides the following technical scheme: the full-color display LED device preparation device of the narrow-band red and green fluorescent powder comprises a working platform and a recovery mechanism, wherein a clamping mechanism is arranged at the top of the working platform, and forms a clamping space based on the upper part of the top surface of the working platform; The fluorescent powder slurry assembly comprises two vertically downward material pipes arranged in a clamping space, a dual-purpose spraying seat is fixed at the discharge ends of the two material pipes, the dual-purpose spraying seat is close to the top surface of the working platform, and the recycling mechanism comprises two recycling pipes arranged in the clamping space, wherein the two recycling pipes are respectively parallel to the inner side of one material pipe; a circulating pipe is connected between the recycling pipe and the material pipe at the outer side of the recycling pipe, a recycling channel is formed between the recycling pipe and the material pipe through the circulating pipe, one end of the recycling pipe, which is far away from the circulating pipe, is close to the top surface of the working platform, and is fixedly provided with a suction seat, and the suction surface of the suction seat is of a mesh structure and is opposite to the inside and outside of a spraying area of the corresponding dual-purpose spraying seat; The recycling channel and the material pipe connected with the recycling channel share one dual-purpose spraying seat, the dual-purpose spraying seat is used for recycling waste powder sucked through the suction seat and the recycling channel to the outside of the working platform through the dual-purpose spraying seat, and the dual-purpose spraying seat is used for spraying powder provided by spraying equipment into the material pipe to the surface of a workpiece in the clamping space; The recovery mechanism further comprises electrostatic adsorption plates fixed on two clamping surfaces of the clamping mechanism, the electrostatic adsorption plate of one clamping surface is opposite to the inside and outside of the spraying area of the corresponding dual-purpose spraying seat, the electrostatic adsorption plate of the other clamping surface is opposite to the spraying surface of the corresponding other dual-purpose spraying seat, and spraying and adsorption actions are performed bidirectionally; The adsorption surface of the electrostatic adsorption plate corresponds to the adsorption surface of the suction seat, and the electrostatic adsorption plate moves relative to the suction seat when the clamping action is performed. As a further preferable mode, one end of the working platform is fixedly provided with a stand column, the top end of the stand column is fixedly provided with a first electric cylinder, an action rod of the first electric cylinder is vertically downwards and is fixedly provided with a Z-direction adjusting arm, the Z-direction adjusting arm horizontally extends to the other end of the working platform far away from the stand column, an adjusting screw is rotatably arranged in the Z-direction adjusting arm along the extending direction of the Z-direction adjusting arm, an X-direction adjusting arm is arranged on the adjusting screw in a transmission mode, two ends of the X-direction adjusting arm symmetrically extend along the Y direction, two material pipes are respectively fixed at two ends of the X-direction adjusting arm, the top ends of two recovery pipes are jointly fixedly provided with a connecting plate, the top end of the connecting plate is