CN210325844U

CN210325844U - Dark color plastic bowl cup packaging LED capable of improving brightness

Info

Publication number: CN210325844U
Application number: CN201921245450.1U
Authority: CN
Inventors: 马洪毅; 付桂花
Original assignee: Shanxi Gaoke Huaxing Electronic Technology Co ltd
Current assignee: Shanxi Gaoke Huaxing Electronic Technology Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-04-14
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a dark color plastic bowl cup packaged LED for improving brightness, which comprises a dark color LED bowl cup, a white reflection cup and packaging glue, wherein a welding wire and a luminous chip are arranged in the dark color LED bowl cup; a white reflection cup is arranged in the dark color LED bowl cup, and the dark color LED bowl cup and the white reflection cup are connected into a whole through packaging glue; the shape of the white reflecting cup is consistent with that of the dark color LED bowl cup, the size of the white reflecting cup is smaller than that of the dark color LED bowl cup, and the height of the white reflecting cup is lower than that of the dark color LED bowl cup. The LED has high brightness, good durability and convenient production.

Description

Dark color plastic bowl cup packaging LED capable of improving brightness

Technical Field

The utility model relates to a dark color plastic bowl cup encapsulation LED of promotion luminance belongs to LED display screen technical field.

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 ratio 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 ratio 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 proportion of LEDs on the surface of the display screen reaches about 50 percent (the rest 50 percent is a black mask or black glue), so the blackness of the lamp surface directly influences the contrast of the display screen; another key indicator of the display screen: the brightness is mainly determined by the LED brightness. The brightness of the LED is related to the LED chip and the bowl cup reflectivity of the packaging carrier, 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 about 50 percent 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, the brightness is high when the current is large, and the power consumption is high when the current is large. In order to obtain higher contrast and higher brightness, the display screen industry adopts a mode of coating black ink on the surface and the periphery of a bowl cup of an LED white plastic support to increase the contrast without sacrificing the brightness of the LED. The method has a good painting effect on 2.5mm large-size LEDs, and the painting consistency of the LED plastic bowl cup smaller than the size is difficult to control, so that the problems that ink flows into the bowl cup or the painting is inconsistent are easy to occur. In addition, the color of the black ink also needs to be adjusted, and once the proportion is out of order in the adjustment process, the problem of inconsistent ink color of the black ink is easy to occur. And the higher the painting cost with smaller size. Meanwhile, the bowl cup injection molded by the white plastic material can be yellowed due to high-temperature baking at 150 ℃ and above in the LED packaging process and the downstream patch reflow soldering process, so that the color is different, and the screen is scratched.

SUMMERY OF THE UTILITY MODEL

For overcoming the deficiencies of the prior art, the utility model provides a promote dark color plastic bowl cup encapsulation LED of luminance, this LED luminance is high, the durability is good, production is convenient.

The utility model discloses a following technical scheme realizes:

a dark color plastic bowl cup packaged LED for improving brightness comprises a dark color LED bowl cup, a white reflection cup and packaging glue, wherein a bonding wire and a light emitting chip are arranged in the dark color LED bowl cup; a white reflection cup is arranged in the dark color LED bowl cup, and the dark color LED bowl cup and the white reflection cup are connected into a whole through packaging glue;

the shape of the white reflecting cup is consistent with that of the dark color LED bowl cup, the size of the white reflecting cup is smaller than that of the dark color LED bowl cup, and the height of the white reflecting cup is lower than that of the dark color LED bowl cup.

Preferably, the expansion coefficient of the material of the white reflecting cup is lower than that of the packaging adhesive.

Preferably, the inner wall of the white reflecting cup is plated with a silvery white specular reflecting layer.

Preferably, the white reflecting cup can also be a white reflecting film.

Preferably, the white reflecting cup is made of brittle PPS or epoxy resin.

Preferably, the thickness of the white reflecting cup is 0.05-0.5 mm.

Preferably, the white reflecting cup is a tubular quadrangular cone which is communicated up and down, the top of the white reflecting cup is a large-hole end face, the bottom of the white reflecting cup is a small-hole end, a raised fulcrum is arranged at the small-hole end, and the fulcrum is in contact with the bottom of the dark LED bowl cup.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. compared with the LED produced by a traditional support which is used for coating ink on a white plastic bowl cup, the LED produced by the plastic LED bowl cup support made of the dark-colored material has higher contrast;

2. the process of brushing ink is omitted by directly injecting the dark-colored plastic material into the bowl and cup, and the equipment investment and production cost of brushing ink are saved;

3. the dark plastic material is obtained by directly injecting the bowl and the cup, the color consistency of the plastic bowl and the cup is well controlled, and the defects that the printing ink is not uniformly coated in the printing ink coating process on the surface of the white plastic injection bowl and the printing ink flows into the bowl and the printing ink is not uniform in color, and the printing ink on the surface falls off and is exposed to white are avoided;

4. the white plastic reflecting cup arranged in the dark plastic bowl cup is made of a material with an expansion coefficient lower than that of the packaging glue, and when the white reflecting cup is placed in the dark plastic bowl cup and is poured by the packaging glue, the reflecting cup is equivalent to a large filler, so that the thermal expansion coefficient of the packaging glue can be reduced, and the reliability of a product is improved;

5. although the prior art also has precedent of black and white bowls, the manufacturing method can not realize batch operation and automatic assembly at all, thereby causing low production efficiency. The utility model discloses white reflection cup makes into the flakiness structure of adjusting well with every bowl cup of LED support, and the locating hole that the edge area is unanimous with the LED support makes it be convenient for machine identification and adjust well automatically when batch operation, then adopts the tool automatic will reflect in the cup puts into every dark plastic LED bowl cup, degree of automation height, the batch operation of being convenient for.

Drawings

FIG. 1 is a schematic structural diagram of the dark color plastic cup packaged LED of the present invention.

Fig. 2 is the side view structure schematic diagram of the dark color plastic bowl cup packaged LED of the present invention.

Fig. 3 is a schematic structural view of the white reflecting cup of the present invention.

Fig. 4 is a top view of the white reflector cup of the present invention.

FIG. 5 is a schematic view of the preparation process of the dark color plastic cup packaged LED of the present invention.

Fig. 6 is a schematic diagram of the side view of the structure change process of the dark color plastic bowl cup packaged LED of the present invention.

FIG. 7 is a schematic view of the structure of the fragmented LED bowl and cup holder of the present invention;

fig. 8 is a schematic view of the structure of the whole white reflecting cup of the present invention.

In the figure, 101-a support frame, 102-a support positioning hole, 103-a support vertical rib, 104-a support horizontal rib, 105-an LED bowl, 111-an LED light-emitting chip, 112-a bonding wire, 113-packaging glue, 201-a reflection cup frame, 202-a reflection cup positioning hole, 203-a support connecting longitudinal rib, 204-a support connecting horizontal rib, 205-a support connecting point, 301-a white reflection cup, 302-a white reflection cup large hole end surface, 303-a white reflection cup small hole end surface, 304-a fulcrum and 305-a white reflection cup inner wall mirror reflection layer.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to these embodiments, and any changes or equivalent substitutions that do not depart from the spirit of the present invention are intended to be included within the scope of the present invention.

Example 1

As shown in fig. 1 and 2, a dark color plastic bowl cup packaged LED with improved brightness comprises a dark color LED bowl cup 105, a white reflection cup 301 and a packaging adhesive 113, wherein a bonding wire 112 and a light emitting chip 111 are arranged in the dark color LED bowl cup 105; a white reflection cup 301 is arranged in the dark color LED bowl cup 105, and the dark color LED bowl cup and the white reflection cup are connected into a whole through packaging glue 113;

As shown in fig. 3 and 4, the shape of the white reflecting cup 301 is the same as the shape of the LED bowl cup, the height of the white reflecting cup is lower than the depth of the dark LED bowl cup, and the size of the white reflecting cup 301 is smaller than that of the LED bowl cup 105, so that the white reflecting cup 301 can be easily placed in the LED bowl cup without shaking; the white reflecting cup can be poured into the dark plastic LED bowl cup by the packaging glue conveniently.

The white reflection cup 301 is in a shape of a tubular quadrangular cone which is through from top to bottom, the end face 302 of the large hole faces upwards, the end face 303 of the small hole contacts the bottom of the dark color plastic LED bowl cup 105, the small hole end at the bottom of the white reflection cup is designed into four raised fulcrums 304, and when the white reflection cup 301 is placed in the dark color plastic LED bowl cup, the four raised fulcrums 105 contact the bottom of the cup, so that the LED packaging glue of liquid can be fully filled, and the white reflection cup can be completely wrapped. The number of the fulcrums may also be six, eight or more.

In order to increase the reflection effect, a silvery-white specular reflection layer 305 is plated on the inner wall of the white reflection cup. The reflection effect can be greatly improved, and the light loss is reduced.

The utility model discloses a white reflection cup adopts whole piece injection moulding, arranges and arranges unanimously with LED bowl cup, and white reflection cup adopts the better material of fragility, and white reflection cup is through superfine support splice bar and reflection cup frame attach, supports the splice bar and generally sets up to support and connects horizontal muscle and support and connect and indulge the muscle.

The utility model discloses a scheme of built-in reflection cup has reached the same blast effect of traditional white plastic bowl cup, has avoidd white plastic bowl cup surface simultaneously and has applied paint black printing ink inequality, the interior ink flow of cup, the inconsistent scheduling problem of black color, in LED encapsulation and finished product use, and the outer contactless LED lamp face of unavoidable also can cause printing ink to drop the problem of revealing white. And the bowl cup is directly injected by adopting dark plastic materials, so that the cost of printing ink brushing is saved, and high-temperature yellowing of white plastic in an LED packaging process and a finished product patch reflow soldering process is avoided. Because the utility model discloses a built-in white reflection cup coefficient of thermal expansion be less than the gluey material of encapsulation, and built-in reflection cup plays stabilizing effect, can improve the gluey thermal stress of encapsulation, promotes LED's reliability.

A method for improving the brightness of a dark color plastic bowl cup packaged LED comprises the following steps:

1) the LED bowl and cup support structure is formed by injection molding of a dark-colored plastic material, wherein the dark-colored plastic material is preferably black or dark brown.

As shown in fig. 7, the sheet LED bowl support structure includes a support frame 101 and an LED bowl 105 disposed thereon, wherein a plurality of support positioning holes 102 are disposed on the support frame; the LED bowl cup 105 is fixed on the support frame through the support ribs; the bracket support ribs include bracket support transverse ribs 104 and bracket support vertical ribs 105.

2) Using white plastic to injection mold the whole white reflecting cup structure:

as shown in fig. 8, the whole white reflecting cup structure includes a reflecting cup frame 201 and a white reflecting cup 301 disposed thereon, wherein a plurality of reflecting cup positioning holes 202 are disposed on the reflecting cup frame 201, and the positions and sizes of the reflecting cup positioning holes 202 and the bracket positioning holes 102 are matched with each other; the white reflecting cup 301 is arranged on the reflecting cup frame 201 through the supporting connection points 205 and the supporting connection ribs, and the arrangement of the white reflecting cup 301 is consistent with that of the LED bowl cup 105, so that the whole piece type combined installation can be realized conveniently during the assembly;

the shape of the white reflecting cup 301 is consistent with that of the LED bowl cup, the height of the white reflecting cup is lower than the depth of the dark LED bowl cup, and the size of the white reflecting cup 301 is smaller than that of the LED bowl cup 105, so that the white reflecting cup 301 is easily placed in the LED bowl cup and does not shake; the white reflecting cup can be poured into the dark plastic LED bowl cup by the packaging glue conveniently.

The thickness of the white reflecting cup is 0.05-0.5 mm. The white reflecting cup can also be a white reflecting film.

3) Normally fixing crystal and welding line in the LED bowl cup, placing the whole white reflection cup structure and the reflection cup frame on the LED bowl cup support structure in a piece to be aligned before dispensing, flushing each white reflection cup away from the supporting connecting rib, dropping the white reflection cup in the LED bowl cup with deep color, injecting liquid packaging glue into the LED bowl cup, pouring the white reflection cup into the LED bowl cup with deep color, and enabling the white reflection cup, the packaging glue and the LED bowl cup with deep color to be integrated.

The utility model discloses a white reflection cup adopts whole piece injection moulding, arranges and arranges unanimously with LED bowl cup, and white reflection cup adopts plastics materials such as the better PPS of fragility or epoxy, and white reflection cup is convenient for dash from dropping through superfine support splice bar and reflection cup frame attach, supports the splice bar and generally sets up to support and connects horizontal muscle and support and connect and indulge the muscle. As shown in fig. 8.

Place the white reflection cup structure of whole piece on whole piece LED bowl cup bearing structure before the point is glued, adjust well, dash every white reflection cup through special tool and leave the support splice bar, drop in dark plastic LED bowl cup, promote like this and place efficiency, the batch operation of being convenient for.

The expansion coefficient of the material of white reflection cup is less than the expansion coefficient of encapsulation glue, and white reflection cup is filled the pouring in dark color plastic LED bowl cup like this, can also improve the thermal stress of encapsulation glue, promotes LED's reliability.

By taking 2727 full-color LED packaging forms common in the industry as an example, the LED of the traditional black-shell bowl cup and the LED packaged in the bowl cup of the application are used for detecting the brightness of emergent light, and the obtained detection data are shown in the following table 1:

TABLE 1

It can be seen from the table that the utility model discloses dark plastic bowl cup encapsulation LED compares in traditional black bowl cup LED and has very good blast effect.

The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dark color plastic bowl cup packaged LED for improving brightness is characterized by comprising a dark color LED bowl cup, a white reflection cup and packaging glue, wherein a bonding wire and a light emitting chip are arranged in the dark color LED bowl cup; a white reflection cup is arranged in the dark color LED bowl cup, and the dark color LED bowl cup and the white reflection cup are connected into a whole through packaging glue;

2. The dark color plastic bowl packaged LED with improved brightness according to claim 1, wherein the white reflecting cup is in the shape of a tubular quadrangular cone which is perforated from top to bottom, the top is large, the bottom is small, the top is a large hole end face, the bottom is a small hole end, the small hole end is provided with a convex fulcrum, and the fulcrum contacts with the bottom of the dark color LED bowl.

3. A dark-colored plastic bowl packaged LED with improved brightness according to claim 1, wherein the inner wall of the white reflecting cup is coated with a silvery-white specular reflecting layer.

4. The dark plastic bowl packaged LED with enhanced brightness according to claim 1, wherein the white reflective cup is made of a material with an expansion coefficient lower than that of the packaging glue.

5. The dark plastic bowl packaged LED with enhanced brightness according to claim 1, wherein the white reflector cup is further a white reflective film.

6. The dark-colored plastic bowl-packaged LED with improved brightness according to claim 1, wherein the thickness of the white reflecting cup is 0.05-0.5 mm.