Multi-angle luminous COB (Chip On Board) flexible lamp strip and dispensing head thereof

Abstract

The utility model relates to the technical field of flexible lamp strips, in particular to a multi-angle luminous COB (Chip On Board) flexible lamp strip and a dispensing head thereof. The flexible lamp strip comprises a flexible circuit board, LED chips, an oblique angle colloid and a light blocking colloid, a plurality of light-emitting lamp strips are arranged on the flexible circuit board, each light-emitting lamp strip is connected with a plurality of LED chips, the light-emitting lamp strips are divided into middle LED lamp strips and side LED lamp strips, the oblique angle colloid is connected to the flexible circuit board and located between the middle LED lamp strips and the side LED lamp strips, and the light blocking colloid is arranged between the middle LED lamp strips and the side LED lamp strips. The light blocking colloid is connected to the tops of the oblique angle colloids and extends towards the two side edges to cover the side edge LED lamp strips, the inner sides of the two oblique angle colloids form a light-emitting area of the middle LED lamp strip, and the outer sides of the light blocking colloid and the oblique angle colloids form light-emitting areas of the side edge LED lamp strips. According to the flexible lamp strip, circuits in the three areas are independently designed, the oblique angle colloid and the light blocking colloid are matched to enable the lamp strips in the three areas to form three independent light emitting directions respectively, and multi-angle light emitting of the whole flexible lamp strip is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible light strips, in particular to a COB flexible light strip capable of emitting light at multiple angles and a glue dispensing head thereof. Background Art

[0002] With the growing development of COB light strips in the decoration industry, the market demand has increased rapidly. In daily life, the demand of end consumers for home atmosphere lighting and soft light without main lighting has also increased sharply, and people's requirements for light color have gradually increased. The original traditional SMD patch light strips are made of lamp beads, and the solution is relatively mature. It has occupied the title of the first in atmosphere lighting for a long time. With the upgrading of products, the improvement of the supply chain, and the investment in product research and development, COB packaged flexible light strips have been developed. At present, they occupy a certain market. End consumers are also gradually liking COB flexible light strips. The luminous of traditional SMD light strips The angle is narrow. For example, the light strip made of the most conventional 2835 lamp beads, due to the limitation of packaging, the height of the bowl determines the angle of the LED chip. Therefore, the light angle of the finished light strip is less than 125°. The flat light angle of the COB flexible light strip can reach 180° without the support of other external auxiliary materials, and the light is soft, not dazzling and linear. Under ambient light conditions, the eye fatigue is not so strong. With different installation needs, ambient light effects are required in multiple environments. Therefore, a COB flexible light strip that can emit light at multiple angles is needed. Utility Model Content

[0003] The utility model provides a COB flexible light strip capable of emitting light at multiple angles and a glue dispensing head thereof, aiming to meet the demand for providing ambient light to multiple environments.

[0004] The utility model provides a multi-angle luminous COB flexible light strip, comprising a flexible circuit board, an LED chip, an angled colloid, and a light-blocking colloid, wherein a plurality of light-emitting light strips are arranged on the flexible circuit board, each of the light-emitting light strips is connected to a plurality of LED chips, and the plurality of light-emitting light strips are divided into a middle LED light strip and a side LED light strip, the angled colloid is connected to the flexible circuit board, the angled colloid is located between the middle LED light strip and the side LED light strip, the light-blocking colloid is connected to the top of the angled colloid and extends to both sides to cover above the side LED light strips, the inner sides of the two angled colloids constitute the light-emitting area of ​​the middle LED light strip, and the outer sides of the light-blocking colloid and the angled colloid constitute the light-emitting area of ​​the side LED light strip.

[0005] As a further improvement of the present invention, the multiple light strips are parallel to each other.

[0006] As a further improvement of the present invention, the two angled colloids are mirror-symmetrical with respect to the middle LED light strip.

[0007] As a further improvement of the present invention, the inclined surfaces inside the two beveled colloids form a V-shaped light-emitting area, and the middle LED light strip is located at the bottom of the V-shaped light-emitting area.

[0008] As a further improvement of the present invention, the multiple light strips share a positive electrode or a negative electrode.

[0009] As a further improvement of the present invention, the surfaces of the LED chips of the middle LED light strip and the LED chips of the two side LED light strips are respectively coated with silicone combined with fluorescent powder paste of different colors.

[0010] As a further improvement of the present invention, the flexible circuit board is divided into an area between the middle LED light strip and the side LED light strips with a spacing line, the spacing line is coated with thermosensitive ink, and the bevel colloid is connected to the area within the spacing line.

[0011] As a further improvement of the present invention, the multi-angle luminous COB flexible light strip also includes a current limiting resistor, and the multiple LED chips of each light strip are connected in series in sequence, and the current limiting resistor is connected in series with the LED chip.

[0012] The utility model also provides a glue dispensing head for making the angled colloid of the multi-angle luminous COB flexible light strip, which includes a glue dispensing head body, a glue inlet, a glue outlet, and an air-avoiding slide groove. The bottom of the glue dispensing head body is provided with a mirror-symmetrical inclined wall, and an air-avoiding slide groove is provided at the intersection of the inclined walls. The air-avoiding slide groove matches the LED chip. A glue dispensing cavity is provided inside the glue dispensing head body. The glue inlet is arranged at the top of the glue dispensing head body and connected to the glue dispensing cavity, and the glue outlet is arranged on the inclined wall and connected to the glue dispensing cavity.

[0013] As a further improvement of the utility model, a milky white paste of silica gel combined with titanium dioxide nanopowder is introduced into the glue inlet.

[0014] The beneficial effects of the utility model are as follows: the circuits of the three regions of the middle LED light strip and the side LED light strip are designed separately, so that the three region controllers can perform functions such as switching, dimming, and color adjustment. At the same time, the light strips in the three regions are formed into three independent light emission directions by cooperating with the bevel colloid and the light-blocking colloid, so that the multi-angle light emission of the entire flexible light strip is realized. The production of the bevel colloid on the light strip is realized by the dispensing head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structure diagram of the COB flexible light strip that emits light at multiple angles in the utility model;

[0016] Figure 2 This is a front view of the structure of the COB flexible light strip that emits light at multiple angles according to the utility model;

[0017] Figure 3 This is a structural cross-sectional view of the COB flexible light strip that emits light at multiple angles according to the utility model;

[0018] Figure 4 It is a structural diagram of the glue dispensing head of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] The utility model mainly relates to a COB light strip without light spots for decorative lighting and atmosphere lighting. Specifically, Figures 1 to 3 As shown, the utility model is a multi-angle luminous COB flexible light strip, including a flexible circuit board 1, an LED chip 2, an angled colloid 3, and a light-blocking colloid 4. The flexible circuit board 1 is provided with a plurality of light strips, each of which is connected to a plurality of LED chips 2. The multi-light strips are divided into a middle LED light strip 5 and a side LED light strip 6. The angled colloid 3 is connected to the flexible circuit board 1, and the angled colloid 3 is located between the middle LED light strip 5 and the side LED light strip 6. The light-blocking colloid 4 is connected to the top of the angled colloid 3 and extends to both sides to cover the side LED light strips 6. The inner sides of the two angled colloids 3 constitute the light-emitting area of ​​the middle LED light strip 5, and the outer sides of the light-blocking colloid 4 and the angled colloid 3 constitute the light-emitting area of ​​the side LED light strip 6.

[0021] In order to realize the design and production of circuit boards, three functional parts are designed on the surface of the product. The multi-channel light strip LED chips in the three areas share a common positive or negative pole, and the three area circuits are designed independently. The switching, dimming, color adjustment and other functions are performed through the controller.

[0022] The three light-emitting areas on the flexible circuit board 1 are separated by the bevel colloid 3 and the light-blocking colloid 4, and the three surfaces can emit light independently, namely the left side, the middle and the right side. The light strip is on a plane, the angle of the front light is 90 degrees, and the light-emitting angles on the left and right sides are also 90 degrees. The light-emitting directions are different, the irradiation angles are also different, and the light-emitting angle in a single direction can be independently controlled.

[0023] The bevel colloid 3 and the light-blocking colloid 4 are made of low-refractive silicone, and the A:B mixed viscosity is >35000mPa·s. A large amount of titanium dioxide nanopowder is added thereto and modulated into a milky white color so that the light emitted by the LED chip 2 cannot penetrate when it is working. The mixed viscosity is relatively high, and it can be shaped by the enclosure of the dispensing head, standing on the surface of the flexible circuit board 1 without collapse or deformation. After the dispensing operation is completed, it needs to be baked at high temperature to make it completely solidified and shaped, thereby establishing the light-blocking colloid 4.

[0024] The multiple light strips are parallel to each other, so that the multiple light strips can be easily divided into zones without affecting each other's positions.

[0025] The two oblique angle colloids 3 are mirror-symmetrical with respect to the middle LED light bar 5. This structural design enables the light emitted by the LED chips 2 on the middle LED light bar 5 to be emitted evenly and symmetrically.

[0026] The inclined surfaces inside the two beveled colloids 3 form a V-shaped light-emitting area, and the middle LED light bar 5 is located at the bottom of the V-shaped light-emitting area. This structure allows the V-shaped light guide groove to focus on the light emitted by the middle LED light bar 5, reducing the scattering of the light from the LED chip 2.

[0027] The surfaces of the LED chips 2 of the middle LED light strip 5 and the LED chips 2 of the side LED light strips 6 are coated with silicone combined with phosphor pastes of different colors respectively. Use a conventional dispensing head to apply silicone combined with phosphor pastes of different colors on top of the LED chips 2 of the three different light-emitting areas according to the needs, so that different light-emitting areas can obtain different light-emitting colors; after the first barrier is applied, it is necessary to preheat and bake in an oven at 150°C to make it reach an uncured state, so that the three silicone layers at different times can be perfectly combined during the second and third coatings.

[0028] The flexible circuit board 1 is divided into an area between the middle LED light bar 5 and the side LED light bar 6 by a spacing line 7, which is coated with a thermosensitive ink, and the bevel colloid 3 is connected to the area within the spacing line 7. The surface of the FPCB flexible circuit board 1 is designed with area division indicator characters, namely, spacing lines 7, which are coated with thermosensitive ink on the surface of the FPCB flexible circuit board 1 by spraying. This design is mainly convenient for the control of precision during the product manufacturing process, and also provides a standard reference for manufacturing during production operations. The use of thermosensitive ink is mainly to ensure that the ink will gradually degrade and disappear as the temperature rises during high-temperature baking in the subsequent operation process, so as not to affect the adhesion and appearance of the surface reflective layer of the FPCB flexible circuit board 1 and the glue.

[0029] The multi-angle luminous COB flexible light strip also includes a current limiting resistor 8. The multiple LED chips 2 of each luminous light strip are connected in series in sequence, and the current limiting resistor 8 is connected in series with the LED chip 2. The multiple LED chips 2 of the same path are connected in series to facilitate synchronous control, and the addition of the current limiting resistor 8 can prevent the current of the same path from being too large and damaging the LED chip 2.

[0030] like Figure 4As shown, the utility model also provides a glue dispensing head 9, which is used to make the beveled colloid 3 of the COB flexible light strip with multi-angle light emission. The glue dispensing head 9 includes a glue dispensing head body 91, a glue inlet 92, a glue outlet 93, and an air-avoiding slide groove 94. The bottom of the glue dispensing head body 91 is provided with a mirror-symmetrical inclined wall 95, and the intersection of the inclined walls 95 is provided with an air-avoiding slide groove 94. The air-avoiding slide groove 94 matches the LED chip 2. A glue dispensing cavity 96 is provided inside the glue dispensing head body 91. The glue inlet 92 is connected to the top of the glue dispensing head body 91 and is connected to the glue dispensing cavity 96. The glue outlet is arranged on the inclined wall 95 and is connected to the glue dispensing cavity 96.

[0031] In the process of making COB flexible light strips, two dispensing heads 9 are needed, one of which is a conventional dispensing head, which is used to dispense glue above the LED chip 2; the other is the dispensing head 9 of the above structure, which has a mirror-symmetrical triangle shape, and an air-avoiding slide 94 is designed in the middle of the two triangles. A milky white paste of silica gel combined with titanium dioxide nanopowder is poured into the glue inlet 92 and evenly coated on the area dividing indicator characters by a dispensing machine. The purpose is to form a blocking barrier on the surface of the FPCB flexible circuit board 1 so that its three different areas have independent light-emitting directions. The purpose of the air-avoiding slide 94 is to prevent the LED chip 2 in the central area of ​​the FOCB flexible circuit board 1 from being hit and scratched during the coating process.

[0032] The multi-angle luminous COB flexible light strip of the utility model is manufactured by the following steps:

[0033] Step 1: Draw the circuit first, design and arrange the circuit data of three independent areas, and design the model data of the dispensing head 9 at the same time;

[0034] Step 2: The flexible circuit board 1 is made by prefabricating the circuit, and the circuit layer, the filling layer, the functional area, etc. are formed by multi-layer printing and etching. The whole printing can be performed, and then the strips are cut. The dispensing head 9 model data is washed out by the machine tool and prepared;

[0035] Step 3: Perform die bonding on the manufactured flexible circuit board 1. Die bonding is to fix the LED flip chip on the node of the circuit layer with solder paste or other colloids, so that the electrode of the LED flip chip forms an electrical connection with the circuit layer;

[0036] Step 4: Before step 3, other current limiting resistors 8 can be welded on the circuit board using production equipment, or the current limiting resistors 8 can be fixed on the flexible circuit board 1 with solder paste or other colloids while or after fixing the flip chip;

[0037] Step 5: Put the FPC flexible circuit board 1 after the die bonding is completed into the reflow soldering, and solder the flip chip and the current limiter on the circuit board;

[0038] Step 6: Prepare the milky white paste of silica gel combined with titanium dioxide nanopowder, program the dispensing machine according to the shape of the FPCB, align the dispensing head 9 with the glue outlet 93 on the reserved silk screen positioning line on the FPCB, apply the glue to the designated area after dispensing, put it in the oven to slightly cure it, prepare the diffusion layer glue to cover the three areas, and finally apply the light-blocking glue on the left and right sides. After the operation is completed, perform high temperature complete curing.

[0039] Step 7: After the high-temperature baked materials are taken out of the oven, they are pre-cut, electrically tested, and visually inspected, and then simply packaged;

[0040] Step 8: Weld the plates according to the length and size required by the customer, connect them to the length required by the customer, connect them to the power supply and put them on the aging rack for room temperature aging. After completion, reel them, bag them, inspect them, put them into storage, and ship them out.

[0041] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A multi-angle luminous COB flexible light strip, characterized in that: It includes a flexible circuit board, an LED chip, an angled colloid, and a light-blocking colloid. The flexible circuit board is provided with multiple light strips, each of which is connected to multiple LED chips. The multiple light strips are divided into a middle LED light strip and side LED light strips. The angled colloid is connected to the flexible circuit board, the angled colloid is located between the middle LED light strip and the side LED light strip, the light-blocking colloid is connected to the top of the angled colloid and extends to both sides to cover the side LED light strips. The inner sides of the two angled colloids constitute the light-emitting area of ​​the middle LED light strip, and the outer sides of the light-blocking colloid and the angled colloid constitute the light-emitting area of ​​the side LED light strip.

2. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: The multiple light strips are parallel to each other.

3. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: The two angled colloids are mirror-symmetrical with respect to the middle LED light strip.

4. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: The inclined surfaces inside the two beveled colloids form a V-shaped light-emitting area, and the middle LED light strip is located at the bottom of the V-shaped light-emitting area.

5. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: The multiple light strips share a positive electrode or a negative electrode.

6. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: The surfaces of the LED chips of the middle LED light strip and the LED chips of the two side LED light strips are respectively coated with silicone combined with fluorescent powder paste of different colors.

7. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: The flexible circuit board is divided into an area between the middle LED light bar and the side LED light bar by a spacing line, the spacing line is coated with a thermosensitive ink, and the bevel colloid is connected to the area within the spacing line.

8. The multi-angle luminous COB flexible light strip according to claim 1, characterized in that: It also includes a current limiting resistor. A plurality of LED chips of each light strip are connected in series in sequence, and the current limiting resistor is connected in series with the LED chip.

9. A dispensing head for making an angled colloid of a COB flexible light strip with multi-angle light emission as claimed in any one of claims 1 to 8, characterized in that: It includes a glue dispensing head body, a glue inlet, a glue outlet, and an air-avoiding slide groove. The bottom of the glue dispensing head body is provided with a mirror-symmetrical inclined wall, and the intersection of the inclined walls is provided with an air-avoiding slide groove, and the air-avoiding slide groove matches the LED chip. A glue dispensing cavity is provided inside the glue dispensing head body, the glue inlet is arranged at the top of the glue dispensing head body and connected to the glue dispensing cavity, and the glue outlet is arranged on the inclined wall and connected to the glue dispensing cavity.

10. The dispensing head according to claim 9, characterized in that: The glue inlet is fed with a milky white paste of silica gel combined with titanium dioxide nano powder.

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