CN110012607A - A kind of 8K television set height highlights oily mainboard leveling and screen printing method - Google Patents
A kind of 8K television set height highlights oily mainboard leveling and screen printing method Download PDFInfo
- Publication number
- CN110012607A CN110012607A CN201910348363.7A CN201910348363A CN110012607A CN 110012607 A CN110012607 A CN 110012607A CN 201910348363 A CN201910348363 A CN 201910348363A CN 110012607 A CN110012607 A CN 110012607A
- Authority
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- China
- Prior art keywords
- mainboard
- oily
- leveling
- television set
- wiring board
- Prior art date
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000007650 screen-printing Methods 0.000 title claims abstract description 16
- 238000007639 printing Methods 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000005554 pickling Methods 0.000 claims abstract description 14
- 239000011162 core material Substances 0.000 claims abstract description 4
- 238000007731 hot pressing Methods 0.000 claims abstract description 4
- 238000011161 development Methods 0.000 claims description 13
- 239000011324 bead Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000004519 grease Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 206010023126 Jaundice Diseases 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0055—After-treatment, e.g. cleaning or desmearing of holes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0094—Filling or covering plated through-holes or blind plated vias, e.g. for masking or for mechanical reinforcement
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/26—Cleaning or polishing of the conductive pattern
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Printing Methods (AREA)
Abstract
The present invention relates to a kind of 8K television set height to highlight the leveling of oily mainboard and screen printing method, comprising the following steps: step 1, core material pressure it is roasting 150 degree 4 hours, pad blank sheet of paper pressure is roasting after multi-layer coreboard contraposition stacking, pressure 6-8KG, 150 degree of hot pressing 2 hours, cold pressing 1.5 hours；Step 2, polish-brush pickling；Step 3, printing ink to manufacture；Step 4, printing and it is pre-baked, the addition printing ink in printing machine, mesh specification is used to carry out the first printing on the wiring board Jing Guo polish-brush pickling for the silk-screen halftone of 43T, and it is carried out after laying flat standing 30 minutes pre-baked for the first time, hereafter the second printing is carried out, it is pre-baked for the second time to lay flat progress after standing 30 minutes again；Step 5, contraposition exposure are realized contraposition using CCD identification location hole, are exposed after contraposition using LED.8K television set height of the invention highlights oily mainboard leveling and screen printing method, to improve product yield, guarantees that production quality is high, scrappage is low, effectively ensures the high production quality stability for highlighting oily mainboard.
Description
Technical field
The present invention relates to 8K TV manufacturing fields, highlight oily mainboard leveling and silk-screen especially with regard to a kind of 8K television set height
Method.
Background technique
8K TV is the important development direction of future television machine, and 8K television set becomes major television factory also naturally
Quotient falls over each other the emerging market grabbed；But since the resolution ratio of 8K television set is very high, the requirement for hardware is also very high,
Especially its display panel has been unable to satisfy using traditional panel.
One 8K television set needs 20 pieces of mainboards, 1260 lamp beads is installed on every piece of mainboard, therefore a 8K television set needs
25200 lamp beads are installed, PAD is more, and PAD incompleteness then scrap by whole plate in production process, and excessive PAD causes whole plate yield low
Under.8K TV SKD sticks up that requirement is high to plate, is generally 0.075% to the error range that plate is stuck up in industry, if such as motherboard size
For 163.4mm × 461.1mm, then plate, which is stuck up, can arrive 461.4mm × 0.075%=3.45mm, but 8K TV SKD requires plate to stick up
Within 0.5mm, manufacture difficulty is big.8K TV SKD requires consent very high, it is desirable that consent aperture 0.4+/- 0.076mm, lamp
Pearl face requires consent smooth, is not allow for recess and blacks, it is desirable that ink reflectance 84%-89%, spray two dimensional code is not permitted on white oil
Permitted have the phenomenon that diffusion.
Summary of the invention
In view of this, the present invention in order to solve the above technical problems, provide a kind of 8K television set height highlight oily mainboard leveling and
Screen printing method guarantees that production quality is high, scrappage is low, effectively ensures the high production product for highlighting oily mainboard to improve product yield
Matter stability.
The purpose of the present invention is achieved through the following technical solutions:
A kind of 8K television set height highlights oily mainboard leveling and screen printing method, comprising the following steps:
Step 1, core material pressure bake 150 degree 4 hours, and pad blank sheet of paper pressure is baked after multi-layer coreboard contraposition stacking, pressure 6-8KG, hot pressing
150 degree 2 hours, be cold-pressed 1.5 hours；To reduce the amplitude that plate is stuck up, guarantee that plate sticks up control within the scope of designated precision；
Wiring board is carried out polish-brush pickling by step 2, polish-brush pickling, to remove its oxidation and greasy dirt, is then stood wiring board,
Time of repose is less than 2 hours；
Step 3, printing ink to manufacture by white oil and are opened grease and are mixed, stand after stirring, use as printing ink；
Step 4, printing and pre-baked, print ink toward addition in printing machine, mesh specification are used to pass through for the silk-screen halftone of 43T
The first printing is carried out on the wiring board of polish-brush pickling, and progress is pre-baked for the first time after laying flat standing 30 minutes, hereafter carries out
It is pre-baked for the second time to lay flat progress after standing 30 minutes again for the second printing；To guarantee that ink thickness is in OK range, and
Ink even uniform everywhere；
Step 5, contraposition exposure are realized contraposition using CCD identification location hole, are exposed after contraposition using LED；To reduce PAD
Incomplete phenomenon occurs；
Step 6, development carry out development treatment to the wiring board after exposure using developing machine, wherein be both needed to will be in slot for development every time
Development liquid medicine renews；Occurred with being further reduced the phenomenon of PAD incompleteness.
Preferably, after the completion of the step 1, wiring board is sent to machine for checking planeness and is screened.
Preferably, concentration is used to carry out pickling for 2% sulfuric acid in the step 2；Guarantee that plate face oxide all removes,
There are diffusion phenomena to avoid subsequent white oil face two dimensional code.
Preferably, it when using mesh specification to be printed in the step 4 for the silk-screen halftone of 43T, does not add any dilute
Release agent.
Preferably, after the completion of the step 4, using binding dust pair of rollers halftone carry out binding dust, and to halftone surrounding enviroment into
Row cleaning.
Preferably, in the step 4, pre-baked end twice to the interval time that contraposition exposure starts is no more than 12 hours.
Preferably, before the step 6, idler wheel dedusting need to be carried out to wiring board, washing is cleaned.
Preferably, it also needs to carry out aluminium flake consent before the step 4, when consent, wiring board be laid flat, at this time the lamp of wiring board
Pearl is face-up, using aeroscopic plate and from the face-down consent of the lamp bead of wiring board；To guarantee that lamp bead face consent is full.
Compared with the prior art, the invention has the advantages that:
8K television set height of the present invention highlights oily mainboard screen printing method, and the thickness of ink reaches 1.5mil or more, and traditional white oil
Thickness is only 0.4mil, and not only white oil thickness is thicker, but also ink is full in hole, and aperture flatness reaches 95% or more, at present industry
Boundary rarely produces the production technology of super thick ink, and the production technology of a small number of several super thick ink is all made of repeatedly printing ability
Guarantee that the thickness of ink repeatedly prints product product produced since white oil is the printing ink of industry quality more difficult to control
Matter is poor, and scrappage is high；The present invention effectively promotes the high production efficiency for highlighting oily mainboard, is different from conventional multi printing technology, and one
Secondary printing can finished product, and produce that quality is high, and scrappage is low, effectively ensure the high production quality stability for highlighting oily mainboard, together
When guarantee production high yield.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, further being retouched in detail below in conjunction with specific embodiment to present invention work
It states.
The embodiment of the present invention includes:
A kind of 8K television set height highlights oily mainboard leveling and screen printing method, comprising steps of
Step 1, core material pressure bake 150 degree 4 hours, and pad blank sheet of paper pressure is baked after multi-layer coreboard contraposition stacking, pressure 6-8KG, hot pressing
150 degree 2 hours, be cold-pressed 1.5 hours；Hereafter, wiring board is sent to machine for checking planeness and is screened, all wiring boards are both needed to carry out
Plate sticks up inspection.
Step 2, polish-brush pickling, will by outer layer processing wiring board carry out polish-brush pickling, use concentration for 2% sulfuric acid
Pickling is carried out, and polish-brush speed is 4.5-5 ms/min, to remove its oxidation and greasy dirt, then stood wiring board, when standing
Between be less than 2 hours.
Step 3, printing ink to manufacture by white oil that item number is S562-001 and are opened grease and are mixed, and white oil and open oil
The ratio of water is that 1 kilogram of white oil adds 100 milliliters to open grease, and stirring stood 10 minutes after 15 minutes, used as printing ink.
Step 3.1, aluminium flake consent when consent, wiring board are laid flat, the lamp bead of wiring board is face-up at this time, using air guide
Plate and from the face-down consent of the lamp bead of wiring board.
Step 4, printing and pre-baked, print ink toward addition in printing machine, mesh specification are used to exist for the silk-screen halftone of 43T
The first printing is carried out on wiring board by polish-brush pickling, prints in ink and does not add any diluent, lays flat 30 points of standing
Clock, then by wiring board carry out for the first time it is pre-baked, with 75 degrees Celsius of temperature pre-baked 24 minutes, then toward printing machine add off-set oil
Ink carries out the second printing, prints in ink and does not add any diluent, lays flat standing again 30 minutes, then carries out second
It is pre-baked, with 75 degrees Celsius of temperature pre-baked 40 minutes；The wet-film thickness being printed on wiring board is greater than or equal to 43 microns, carries out
When batch prints, it is necessary to measure the wet-film thickness of first wiring board printed using film thickness gauge, confirmation wet-film thickness is greater than
Or equal to 43 microns after just can proceed with batch print, to ensure printing quality.It is pre-baked to use special oven and keep
Oven cleaning, specific method are that be stained with alcohol wipe clean using non-dust cloth is reused after dust catcher, need to be cleaned daily four times, silk-screen
It is cleaned after screen frame is good using binding dust idler wheel, and cleaning is primary per hour in printing process, puts trestle table and printing machine periphery
Also it needs to be periodically cleaned.
Step 5, contraposition exposure, using CCD para-position, LED exposure, the printing of wiring board and it is pre-baked after the completion of, at 12 hours
Interior completion identifies first in first out operation, then carries out contraposition exposure using exposure machine, and the contraposition energy gage of exposure machine is controlled in 10-
13 lattice；The energy hole of exposure machine is in 700-750mj/cm2 in step D；5 frame wiring boards of every exposure, then to the table top of exposure machine
Capable cleaning is drawn in wheat；Every contraposition 20PNL plate (i.e. a frame), is checked and is cleaned to the brown piece on exposure machine, to guarantee to expose
Light quality.
Step 6, development, using developing machine to after exposure wiring board carry out development treatment, wherein every time development be both needed to by
Development liquid medicine renews in slot, and concentration is used to develop for the sodium carbonate liquor of 0.8-1.2%, developing powder for 2.2-2.8 meters/
Minute.
The present embodiment prints mesh and uses 43T catch point net presswork technology twice, is the relatively advanced secondary print of industry
The ink bright degree of brush technology, this technology printing is high, is not in the phenomenon that getting rid of oil, layering.
By this technology, the production capacity of LED white oil plate can accomplish ink thickness 1.5mil or more, plate face ink
Uniformity reaches 95% or more, and is not in ink jaundice, foaming phenomena after toasting.
After technical research success, the production capacity of LED circuit board will be greatly improved；At the same time, using secondary printing
Production technology can will reduce to the bad point of ink appearance within 3%, reduce the usage amount of white oil, improve production yield, drop
Low cost.
Although description of this invention combination embodiments above carries out, those skilled in the art
Member can carry out many replacements based on the above contents, modifications and variations, be obvious.Therefore, all such substitutions,
Improvements and changes are included in the spirit and scope of appended claims.
Claims (8)
1. a kind of 8K television set height highlights oily mainboard leveling and screen printing method, which comprises the following steps:
Step 1, core material pressure bake 150 degree 4 hours, and pad blank sheet of paper pressure is baked after multi-layer coreboard contraposition stacking, pressure 6-8KG, hot pressing
150 degree 2 hours, be cold-pressed 1.5 hours；
Wiring board is carried out polish-brush pickling by step 2, polish-brush pickling, to remove its oxidation and greasy dirt, is then stood wiring board,
Time of repose is less than 2 hours；
Step 3, printing ink to manufacture by white oil and are opened grease and are mixed, stand after stirring, use as printing ink；
Step 4, printing and pre-baked, print ink toward addition in printing machine, mesh specification are used to pass through for the silk-screen halftone of 43T
The first printing is carried out on the wiring board of polish-brush pickling, and progress is pre-baked for the first time after laying flat standing 30 minutes, hereafter carries out
It is pre-baked for the second time to lay flat progress after standing 30 minutes again for the second printing；
Step 5, contraposition exposure are realized contraposition using CCD identification location hole, are exposed after contraposition using LED；
Step 6, development carry out development treatment to the wiring board after exposure using developing machine, wherein be both needed to will be in slot for development every time
Development liquid medicine renews.
2. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
After the completion of rapid 1, wiring board is sent to machine for checking planeness and is screened.
3. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
Concentration is used to carry out pickling for 2% sulfuric acid in rapid 2.
4. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
When mesh specification being used to be printed in rapid 4 for the silk-screen halftone of 43T, any diluent is not added.
5. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
After the completion of rapid 4, binding dust is carried out using binding dust pair of rollers halftone, and clean to halftone surrounding enviroment.
6. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
In rapid 4, pre-baked end twice to the interval time that contraposition exposure starts is no more than 12 hours.
7. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
Before rapid 6, idler wheel dedusting need to be carried out to wiring board, washing is cleaned.
8. 8K television set height according to claim 1 highlights oily mainboard leveling and screen printing method, which is characterized in that the step
It also needs to carry out aluminium flake consent before rapid four, when consent, wiring board be laid flat, the lamp bead of wiring board is face-up at this time, using aeroscopic plate
And from the face-down consent of the lamp bead of wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348363.7A CN110012607A (en) | 2019-04-28 | 2019-04-28 | A kind of 8K television set height highlights oily mainboard leveling and screen printing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910348363.7A CN110012607A (en) | 2019-04-28 | 2019-04-28 | A kind of 8K television set height highlights oily mainboard leveling and screen printing method |
Publications (1)
| Publication Number | Publication Date |
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| CN110012607A true CN110012607A (en) | 2019-07-12 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910348363.7A Pending CN110012607A (en) | 2019-04-28 | 2019-04-28 | A kind of 8K television set height highlights oily mainboard leveling and screen printing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110582170A (en) * | 2019-10-10 | 2019-12-17 | 高德（江苏）电子科技有限公司 | Anti-falling improvement process applied to black ink with glossiness less than 6 |
| CN110931364A (en) * | 2019-11-08 | 2020-03-27 | 东莞市国瓷新材料科技有限公司 | White oil treatment process for surface of ceramic substrate |
| CN111942045A (en) * | 2020-08-26 | 2020-11-17 | 深圳市华仁三和科技有限公司 | Overprinting method for accurately coating reflective white oil on Mini-LED |
| CN112040665A (en) * | 2020-08-05 | 2020-12-04 | 胜宏科技（惠州）股份有限公司 | Solder mask method for preventing ink from entering hole |
| CN112764264A (en) * | 2019-10-21 | 2021-05-07 | 三星电子株式会社 | Direct type backlight device and display apparatus having the same |
| CN113891570A (en) * | 2021-08-27 | 2022-01-04 | 珠海杰赛科技有限公司 | Processing method for improving uniformity of character white oil blocks |
| CN114211893A (en) * | 2021-12-14 | 2022-03-22 | 广东合通建业科技股份有限公司 | Preparation process for improving the reflectivity of Mini-LED light panels |
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| CN105307413A (en) * | 2015-10-29 | 2016-02-03 | 胜华电子（惠阳）有限公司 | Ultra-thick white oil circuit board screen-printing method |
| CN106304671A (en) * | 2016-08-30 | 2017-01-04 | 江门崇达电路技术有限公司 | A kind of method for circuit board making soldering-resistance layer |
| CN106332476A (en) * | 2016-11-09 | 2017-01-11 | 珠海杰赛科技有限公司 | Multi-layer PCB manufacturing process |
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| CN105307413A (en) * | 2015-10-29 | 2016-02-03 | 胜华电子（惠阳）有限公司 | Ultra-thick white oil circuit board screen-printing method |
| CN106304671A (en) * | 2016-08-30 | 2017-01-04 | 江门崇达电路技术有限公司 | A kind of method for circuit board making soldering-resistance layer |
| CN106332476A (en) * | 2016-11-09 | 2017-01-11 | 珠海杰赛科技有限公司 | Multi-layer PCB manufacturing process |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110582170A (en) * | 2019-10-10 | 2019-12-17 | 高德（江苏）电子科技有限公司 | Anti-falling improvement process applied to black ink with glossiness less than 6 |
| CN110582170B (en) * | 2019-10-10 | 2022-04-19 | 高德(江苏)电子科技股份有限公司 | Anti-falling improvement process applied to black ink with glossiness less than 6 |
| CN112764264A (en) * | 2019-10-21 | 2021-05-07 | 三星电子株式会社 | Direct type backlight device and display apparatus having the same |
| CN110931364A (en) * | 2019-11-08 | 2020-03-27 | 东莞市国瓷新材料科技有限公司 | White oil treatment process for surface of ceramic substrate |
| CN112040665A (en) * | 2020-08-05 | 2020-12-04 | 胜宏科技（惠州）股份有限公司 | Solder mask method for preventing ink from entering hole |
| CN112040665B (en) * | 2020-08-05 | 2024-06-07 | 胜宏科技（惠州）股份有限公司 | Anti-welding method for preventing ink from entering holes |
| CN111942045A (en) * | 2020-08-26 | 2020-11-17 | 深圳市华仁三和科技有限公司 | Overprinting method for accurately coating reflective white oil on Mini-LED |
| CN113891570A (en) * | 2021-08-27 | 2022-01-04 | 珠海杰赛科技有限公司 | Processing method for improving uniformity of character white oil blocks |
| CN113891570B (en) * | 2021-08-27 | 2023-02-03 | 珠海杰赛科技有限公司 | Processing method for improving uniformity of character white oil blocks |
| CN114211893A (en) * | 2021-12-14 | 2022-03-22 | 广东合通建业科技股份有限公司 | Preparation process for improving the reflectivity of Mini-LED light panels |
| CN114211893B (en) * | 2021-12-14 | 2022-12-06 | 广东合通建业科技股份有限公司 | Preparation process for improving reflectivity of Mini-LED lamp panel |
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Application publication date: 20190712 |