CN111161645A - LED bowl cup capable of improving screen brightness and contrast and printing mold - Google Patents
LED bowl cup capable of improving screen brightness and contrast and printing mold Download PDFInfo
- Publication number
- CN111161645A CN111161645A CN202010062697.0A CN202010062697A CN111161645A CN 111161645 A CN111161645 A CN 111161645A CN 202010062697 A CN202010062697 A CN 202010062697A CN 111161645 A CN111161645 A CN 111161645A
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- Prior art keywords
- cup
- printing
- contrast
- led
- bowl cup
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- 238000007639 printing Methods 0.000 title claims abstract description 60
- 239000004033 plastic Substances 0.000 claims abstract description 41
- 229920003023 plastic Polymers 0.000 claims abstract description 41
- 238000001746 injection moulding Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000009500 colour coating Methods 0.000 claims abstract description 3
- 239000000976 ink Substances 0.000 description 50
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 239000000565 sealant Substances 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000004383 yellowing Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The invention relates to an LED bowl cup and a printing mold for improving the brightness and contrast of a screen, belonging to the technical field of LED display; the purpose is to improve the contrast and brightness index of the display screen through the structure of the small-size LED bowl cup and the quality of printing ink; the bowl cup is integrally formed by injection molding of a dark plastic material and comprises a conical cup body, a vertical cylindrical cup bottom and a cup opening protruding out of the cup body, and the cup opening and the cup body form a stepped structure; a light color coating is arranged on the inner side of the cup body; the lower die of the printing die comprises a plurality of printing raised heads arranged on the base, printing depth positioning steps protruding out of the printing raised heads are arranged at the connection positions of the printing raised heads and the base, the structure of the printing raised heads is matched with that of the LED bowl cup, and the height of the printing depth positioning steps is equal to that of the cup opening; the bowl cup and the mould with the structure can effectively control the thickness and the covering surface of the coating, improve the printing quality and further improve the contrast and the brightness index of the display screen.
Description
Technical Field
The invention belongs to the technical field of LED display, and relates to an LED bowl cup and a printing mold for improving screen brightness and contrast, wherein the printing mold is applied to ink printing of a small-size LED bowl cup.
Background
In the application field of LED display, the brightness and contrast of the display screen are very important indexes for displaying the sharpness of the image quality. The contrast calculation theory is that based on the fact that the display screen is in a completely black dark field environment, the luminosity probe is placed at a certain distance away from the display screen, the luminosity probe is aligned to the center of the display screen, the brightness IVa of the display screen when the display screen is turned off is measured, the display screen is electrified and lightened, the brightness IVb of the display screen when the display screen is completely lightened is measured, and the contrast of the display screen is obtained through IVb/Iva. The brightness of the dark field display screen is directly related to the surface brightness of the display screen, and the blackness of the lamp surface directly influences the contrast of the display screen because the LED proportion on the surface of the display screen reaches about 50 percent (the rest 50 percent is a black mask or black glue); the other key index of the display screen is brightness, and the brightness of the display screen is mainly determined by the brightness of the LED. The brightness of the LED is related to the reflectivity of the bowl cup of the packaging carrier except the LED chip, the reflectivity of the white plastic reaches about 50%, and the reflectivity of the white plastic bowl cup reaches more than 80% by combining the reflection of the silver coating at the bottom of the cup; the black plastic bowl cup has almost no reflection, and the reflection is only based on the silver coating at the bottom of the bowl cup. Under the same condition, the LED brightness of the black plastic bowl cup is 50-60% lower than that of the white plastic bowl cup.
The brightness of the display screen is directly related to the magnitude of the driving current of the display screen and the magnitude of the LED chip, the brightness is high when the current is large, and the power consumption is high when the current is large; similarly, the chip size is high, but the cost is high. In order to obtain higher contrast and higher brightness, the display screen industry needs to obtain higher brightness, so the contrast is increased by brushing black ink on the surface and the periphery of a bowl cup of an LED white plastic support without sacrificing the brightness of the LED. The method has good painting effect on 2.5mm large-size LEDs. For the LED plastic bowl cup with the size smaller than the size, the brushing consistency is difficult to control, the problems that ink flows into the bowl cup or the brushing is inconsistent are easy to occur, and the like, even if the painting can be finished, the cost is high, and the yield is not high. Meanwhile, the bowl cup injection molded by the white plastic material is baked at a high temperature of 150 ℃ or above in an LED packaging process and a downstream patch reflow soldering process to generate yellowing, so that the color is different, and the problem of screen splash is caused.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides the LED bowl cup and the printing mold for improving the brightness and the contrast of the screen, and aims to improve the contrast and the brightness index of the display screen through the structure of the small-size LED bowl cup and the quality of printing ink.
The invention is realized by the following technical scheme.
The LED bowl cup is formed by injection molding of a dark plastic material and integrally formed, comprises a conical cup body, a vertical cylindrical cup bottom and a cup opening protruding out of the cup body, and the cup opening and the cup body form a stepped structure; the inner side of the cup body is provided with a light color coating.
Furthermore, the bowl cup is integrally formed by injection molding of black plastic materials.
Furthermore, the side wall of the cup opening is a conical inclined surface.
Furthermore, the inclined angle of the conical inclined plane of the side wall of the cup opening is the same as that of the cup body, and the size of the inclined plane is matched with that of the cup body.
Furthermore, the height of the cup bottom is 0.02-0.1 mm.
Further, the light-colored coating layer comprises an ink layer which is white or light gray or light yellow.
Further, the dark plastic material is black or dark brown or dark blue material.
The invention also relates to a printing die for printing the light-color ink on the wall of the LED bowl cup, which comprises an upper die and a lower die, wherein the upper die and the lower die form a concave-convex die structure.
Further, an ink discharge hole is formed in the base.
Further, the upper die is provided with a control head for extruding the ink so as to control the thickness of the ink.
The bowl cup is formed by injection molding of a dark plastic material, the structure of the bowl cup is designed into a special structure, the height of the plastic at the bottom of the bowl cup is designed into a vertical shape (no draft angle), and the vertical structure is beneficial to avoiding contacting with a printing raised head with the draft angle and staining the bottom of the bowl cup with light color or white ink. The cup mouth plastic is designed into an amplification step with the same inclination as that of the bowl cup and is used for limiting the depth of the printing raised head when the printing raised head extends into the bowl cup for printing, so that the printing raised head is prevented from contacting the bottom of the bowl cup; the printing of white ink on the wall of the bowl, the cup and the wall of the cup is finished by adopting a concave-convex die structure, and the printing thickness of the ink is controlled by designing a proper die closing gap.
Compared with the prior art, the invention has the beneficial effects that.
According to the invention, through a simple mold process, the cup wall of the bowl and cup of the support frame formed by black plastic injection molding is printed with colorants such as white or other light-colored inks and resins, so that the color of the cup wall is changed, the reflectivity of the cup wall of the bowl and cup is improved, and the light emitting brightness of the LED packaged by the support frame is improved. Through this scheme, change the mode of traditional white plastic bowl cup brush black ink into and adopt black or other dark colour plastics to make the bowl cup, and promote luminance and brush black mode to the bowl cup wall. By adopting the scheme, the phenomenon of color loss caused by external collision after the traditional white plastic is brushed with ink can be avoided; when the quality requirement is the same, the bracket formed by injection molding of black plastic is adopted, and the cost is lower than that of the bracket formed by injection molding of white plastic; the bottom of the bowl cup structure is provided with a section of vertical structure, so that the binding force between the pouring sealant and the bowl cup can be increased; the cup mouth of the bowl cup is designed to be step-shaped, which is beneficial to controlling the glue surface consistency of the pouring sealant during the LED packaging. The bowl cup which is molded by black plastic has good consistency of appearance and color, and avoids the poor problems of color flower and the like caused by inconsistent batch printing ink when 5 faces of the traditional white plastic are printed with ink; in addition, when the white plastic is subjected to a high-temperature reflow soldering process, the plastic yellowing phenomenon can occur, but the bowl cup made of the black plastic does not have the defect, and the stability of the brightness of the LED finished product is facilitated.
Drawings
FIG. 1 is a schematic structural view of an LED bowl and a bottom bracket according to the present invention.
FIG. 2 is a cross-sectional view of an LED bowl and bottom bracket according to the present invention.
FIG. 3 is a cross-sectional view of an LED bowl according to the present invention.
Fig. 4 is a cross-sectional view of an upper mold and a lower mold of the printing mold according to the present invention.
FIG. 5 is a schematic view of ink spreading of a lower mold according to an embodiment.
FIG. 6 is a schematic view of mold clamping according to an embodiment.
FIG. 7 is a schematic diagram of printing white ink in an LED bowl according to an embodiment.
The mold comprises a lower mold 100, an upper mold 200, an ink discharge hole 101, a printing depth positioning step 102, a printing raised head 103, a base 104, a mold closing stop 105, an ink thickness control head 201, ink 301, a bowl 400, a support outer pin 401, a cup bottom 402, a cup opening 403, a support direction identification notch 404, an ink layer 405 and a cup body 406.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of the present invention are described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
Referring to fig. 1, 2 and 3, an LED bowl 400 with screen brightness and contrast enhancement functions is integrally formed by injection molding of black plastic material, and the bowl 400 includes a conical cup body 406, a vertical cylindrical cup bottom 402 and a cup opening 403 protruding from the cup body 406, wherein the height of the cup bottom 402 is 0.02-0.1mm according to design requirements. The side wall of the cup opening 403 is a tapered inclined surface, and the inclined angle of the tapered inclined surface of the side wall of the cup opening 403 is equal to the inclined angle of the cup body 406. The cup mouth 403 and the cup body 406 form a stepped structure; the inside of the cup body 406 is printed with a white ink layer 405.
In addition, as shown in fig. 4, the printing mold is used for printing the white ink layer 405 on the inner side of the cup body 406 of the LED bowl cup, the printing mold is composed of an upper mold 200 and a lower mold 100, the upper mold 200 and the lower mold 100 form a concave-convex mold structure, the lower mold 100 comprises a base 104 and a plurality of printing raised heads 103 uniformly arranged on the base 104, a printing depth positioning step 102 protruding from the side wall of the printing raised head 103 is arranged at the joint of the printing raised head 103 and the base 104, the structure of the printing raised head 103 is adapted to the LED bowl cup, and the height of the printing depth positioning step 102 is equal to the height of the cup opening 403. An ink pouring groove is formed between two adjacent printing bosses 103, and an ink discharge hole 101 is formed in a base positioned in the center of the ink pouring groove and used for discharging redundant ink 301 from the ink discharge hole 101 when the mold is closed. Further, the upper die 200 is provided with an ink thickness control head 201, and the bottom of the potting groove is provided with a mold clamping stopper 105. When the upper and lower molds are closed, the surface of the ink thickness control head 201 contacts the surface of the mold closing stopper 105, and the excess ink can be discharged from the ink drain hole 101 by the mold closing gap, i.e., the ink thickness.
As shown in fig. 5-7, the process of printing white ink on the inner side of the LED bowl by using the mold includes the following steps:
1. as shown in fig. 5, white ink 301 is first spread over the surface of the lower mold 100;
2. as shown in fig. 6, mold closing: the ink is extruded by an ink thickness control head 201 of an upper die 200 to control the thickness of the ink, the ink thickness control head clamped to the upper die contacts a clamping stop position 105, and after clamping, redundant ink 301 is discharged from an ink discharge hole 101;
3. closing the mold and controlling the thickness of the printing ink, and then opening the mold;
4. as shown in fig. 7, the bowl 400 is placed upside down on the printing projection 103, the printing depth positioning step 102 abuts against the cup opening 403 to limit the position of the printing projection 103 penetrating into the bowl 400, and the ink on the surface of the printing projection 103 is transferred to the cup body 406 of the bowl 400.
The LED bowl cup of this structure is through simple mould technology, goes up colouring agent such as white or other light-colored printing ink, resin with the support bowl cup wall printing that black plastic was moulded plastics, changes the cup wall colour, promotes the reflectance of bowl cup wall to promote the LED light-emitting luminance that adopts this support encapsulation. Through this scheme, change the mode of traditional white plastic bowl cup brush black ink into and adopt black or other dark colour plastics to make the bowl cup, and promote luminance and brush black mode to the bowl cup wall. By adopting the scheme, the phenomenon of color loss caused by external collision after the traditional white plastic is brushed with ink can be avoided; when the quality requirement is the same, the bracket formed by injection molding of black plastic is adopted, and the cost is lower than that of the bracket formed by injection molding of white plastic; the bottom of the bowl cup structure is provided with a section of vertical structure, so that the binding force between the pouring sealant and the bowl cup can be increased; the cup mouth of the bowl cup is designed to be step-shaped, which is beneficial to controlling the glue surface consistency of the pouring sealant during the LED packaging. The bowl cup which is molded by black plastic has good consistency of appearance and color, and avoids the poor problems of color flower and the like caused by inconsistent batch printing ink when 5 faces of the traditional white plastic are printed with ink; in addition, when the white plastic is subjected to a high-temperature reflow soldering process, the plastic yellowing phenomenon can occur, but the bowl cup made of the black plastic does not have the defect, and the stability of the brightness of the LED finished product is facilitated.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The LED bowl cup is characterized in that the bowl cup is integrally formed by injection molding of a dark plastic material, the bowl cup comprises a conical cup body, a vertical cylindrical cup bottom and a cup opening protruding out of the cup body, and the cup opening and the cup body form a stepped structure; the inner side of the cup body is provided with a light color coating.
2. The LED bowl cup for improving the brightness and the contrast of the screen according to claim 1, wherein the bowl cup is integrally formed by injection molding of a black plastic material.
3. The LED bowl cup for improving the brightness and the contrast of a screen according to claim 1, wherein the side wall of the cup opening is a tapered inclined surface.
4. The LED bowl cup for improving the screen brightness and the contrast ratio as claimed in claim 3, wherein the inclined angle of the tapered slope of the cup rim sidewall is the same as the inclination angle of the cup body.
5. The LED bowl cup for improving the brightness and the contrast of a screen according to claim 1, wherein the height of the cup bottom is 0.02-0.1 mm.
6. The LED bowl cup for improving screen brightness and contrast according to claim 1, wherein the light-colored coating is a white or light gray or light yellow ink layer.
7. The LED bowl cup for improving the brightness and the contrast of a screen according to claim 1, wherein the dark plastic material is black or dark brown or dark blue.
8. The printing die for the LED bowl cup of claim 1 comprises an upper die and a lower die, wherein the upper die and the lower die form a concave-convex die structure, the printing die is characterized in that the lower die comprises a base and a plurality of printing raised heads uniformly arranged on the base, a printing depth positioning step protruding out of the printing raised heads is arranged at the joint of the printing raised heads and the base, the structure of the printing raised heads is matched with the LED bowl cup, and the height of the printing depth positioning step is equal to the height of the step at the cup opening.
9. The LED bowl printing mold for improving screen brightness and contrast of claim 8, wherein the base is provided with an ink bleed hole.
10. The printing die for improving the screen brightness and the contrast of the LED bowl cup as claimed in claim 8, wherein the upper die is provided with a control head for extruding the ink so as to control the thickness of the ink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062697.0A CN111161645A (en) | 2020-01-19 | 2020-01-19 | LED bowl cup capable of improving screen brightness and contrast and printing mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010062697.0A CN111161645A (en) | 2020-01-19 | 2020-01-19 | LED bowl cup capable of improving screen brightness and contrast and printing mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111161645A true CN111161645A (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010062697.0A Pending CN111161645A (en) | 2020-01-19 | 2020-01-19 | LED bowl cup capable of improving screen brightness and contrast and printing mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111161645A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115019674A (en) * | 2022-04-24 | 2022-09-06 | 山西高科华兴电子科技有限公司 | Outdoor full-color LED display screen module and production process thereof |
| CN117469611A (en) * | 2023-12-28 | 2024-01-30 | 深圳市天成照明有限公司 | Lamp bead support and lamp bead |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634270U (en) * | 1992-10-09 | 1994-05-06 | スタンレー電気株式会社 | LED information display board |
| CN102155686A (en) * | 2011-02-23 | 2011-08-17 | 浙江英特来光电科技有限公司 | High-brightness high-gray-level full-color LED (light emitting diode) |
| CN202042515U (en) * | 2011-04-13 | 2011-11-16 | 惠州市豪恩精密注塑有限公司 | LED (Light Emitting Diode) bracket |
| US20180097159A1 (en) * | 2015-06-01 | 2018-04-05 | Mitsubishi Electric Corporation | Light emitting device, display unit, and image display device |
| CN108649110A (en) * | 2018-04-24 | 2018-10-12 | 易美芯光（北京）科技有限公司 | A kind of LED encapsulation structure and preparation method thereof |
| CN110416386A (en) * | 2019-08-02 | 2019-11-05 | 山西高科华兴电子科技有限公司 | A kind of method and LED promoting dark plastic cement bowl encapsulation LED luminance |
| CN211237609U (en) * | 2020-01-19 | 2020-08-11 | 山西高科华兴电子科技有限公司 | LED bowl cup capable of improving screen brightness and contrast and printing mold |
-
2020
- 2020-01-19 CN CN202010062697.0A patent/CN111161645A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0634270U (en) * | 1992-10-09 | 1994-05-06 | スタンレー電気株式会社 | LED information display board |
| CN102155686A (en) * | 2011-02-23 | 2011-08-17 | 浙江英特来光电科技有限公司 | High-brightness high-gray-level full-color LED (light emitting diode) |
| CN202042515U (en) * | 2011-04-13 | 2011-11-16 | 惠州市豪恩精密注塑有限公司 | LED (Light Emitting Diode) bracket |
| US20180097159A1 (en) * | 2015-06-01 | 2018-04-05 | Mitsubishi Electric Corporation | Light emitting device, display unit, and image display device |
| CN108649110A (en) * | 2018-04-24 | 2018-10-12 | 易美芯光（北京）科技有限公司 | A kind of LED encapsulation structure and preparation method thereof |
| CN110416386A (en) * | 2019-08-02 | 2019-11-05 | 山西高科华兴电子科技有限公司 | A kind of method and LED promoting dark plastic cement bowl encapsulation LED luminance |
| CN211237609U (en) * | 2020-01-19 | 2020-08-11 | 山西高科华兴电子科技有限公司 | LED bowl cup capable of improving screen brightness and contrast and printing mold |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115019674A (en) * | 2022-04-24 | 2022-09-06 | 山西高科华兴电子科技有限公司 | Outdoor full-color LED display screen module and production process thereof |
| CN117469611A (en) * | 2023-12-28 | 2024-01-30 | 深圳市天成照明有限公司 | Lamp bead support and lamp bead |
| CN117469611B (en) * | 2023-12-28 | 2024-03-19 | 深圳市天成照明有限公司 | Lamp bead support and lamp bead |
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