CN216120026U

CN216120026U - LED lamp piece and luminous keyboard with same

Info

Publication number: CN216120026U
Application number: CN202122746792.5U
Authority: CN
Inventors: 朱亚兵
Original assignee: Suzhou Youyue Electronic Co ltd
Current assignee: Suzhou Youyue Electronic Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-03-22
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses an LED lamp piece and a luminous keyboard with the same, wherein the LED lamp piece comprises a flexible substrate, one side of the flexible substrate is provided with a plurality of packaging areas which correspond to a plurality of keyboard key positions one by one, and the other side of the flexible substrate is etched with a luminous circuit. At least one point position communicated with the light-emitting circuit is arranged in each packaging area, and an LED with an internal drive IC is welded on the point position. The LED lamp piece and the light-emitting keyboard can effectively reduce the thickness of the keyboard and meet the requirements of lightness and thinness of products.

Description

LED lamp piece and luminous keyboard with same

Technical Field

The utility model relates to the technical field of luminous keyboards, in particular to an LED lamp piece and a luminous keyboard with the same.

Background

At present, a PCB is mostly adopted as a key carrier of the keyboard, and the light-emitting effect of the keyboard is obtained by adding a light-emitting module on the back surface of the keyboard. The existing light-emitting module mainly comprises a lamp piece, wherein the front side of the lamp piece is provided with an LED, the back side of the lamp piece is provided with an IC (integrated circuit) master control module for controlling the LED, and when the light-emitting module emits light, the IC master control module controls the LED in a small area to emit light simultaneously. This kind of luminous module need set up the total control module of IC alone at the lamp piece back, and the total control module of IC itself also occupies certain space, and this just leads to luminous module whole thickness thicker, and occupation space is great, and along with the pursuit of electronic product frivolous, current luminous keyboard is with being difficult to adapt to market demand, consequently, is necessary to improve luminous keyboard's structure.

Disclosure of Invention

In order to overcome the above disadvantages, an object of the present invention is to provide an LED lamp sheet and a light-emitting keyboard having the LED lamp sheet, which can effectively reduce the thickness of the keyboard and meet the requirement of light and thin products.

In order to achieve the above purpose, one of the technical schemes adopted by the utility model is as follows: the LED lamp piece comprises a flexible substrate, wherein a plurality of packaging areas which correspond to the positions of a plurality of keyboard keys one to one are arranged on one side of the flexible substrate, and a light-emitting circuit is etched on the other side of the flexible substrate. At least one point position communicated with the light-emitting circuit is arranged in each packaging area, and an LED with an internal drive IC is welded on the point position.

The utility model has the beneficial effects that: the point position which is communicated with the light-emitting circuit is arranged in each packaging area, so that the LEDs in the packaging areas are electrically connected into the light-emitting circuit, and the single internal drive IC independently controls the single LED to emit light through the LED with the internal drive IC, so that the light-emitting function of the single key is realized; meanwhile, the internal drive IC is directly integrated inside the LED, so that the mounting space required by additionally installing the IC master control module is saved, the overall thickness of the lamp piece is reduced, and the requirements of compactness, thinness and lightness of a product are met.

Further, the light emitting circuit includes a plurality of power buses connected in parallel, the plurality of power buses are arranged in one-to-one correspondence with the plurality of package regions, and each power bus is configured to supply power to all point locations in the corresponding package region. And a series lead is also arranged in each packaging area and is used for conducting all point positions in the packaging area. Independent power supply of a single packaging area is realized through a plurality of power buses arranged in parallel, and independent work of LEDs in each packaging area is guaranteed; the electric connection of all point positions in the packaging area is realized through the series connection wires, so that all LEDs in a single packaging area can emit light or be extinguished at the same time.

Further, the LED with the internal drive IC comprises an insulating main body, a conductive terminal, the internal drive IC, a light emitting chip and a light transmitting cover. The insulating main body is fixedly connected in the packaging area and is provided with a conductive terminal which is conducted with the point position. The internal drive IC and the light-emitting chip are fixedly connected on the conductive terminal and are electrically connected through a lead. The insulation main body separates the internal drive IC, the light-emitting chip and the flexible substrate, and the internal drive IC, the light-emitting chip and the light-emitting circuit are electrically connected through the conductive terminals.

Further, the LED with the internal drive IC also comprises a light-transmitting cover which covers the insulating main body, and the conductive terminal, the internal drive IC and the light-emitting chip are all positioned in the light-transmitting cover.

Further, the light-transmitting cover is made of epoxy resin.

Further, the flexible substrate is coated with an insulating glue layer covering the light emitting circuit. The insulation protection of the flexible substrate and the light-emitting circuit is realized through the arrangement of the insulation glue layer, and the oxidation risk of the light-emitting circuit is reduced.

Furthermore, a film switch circuit is etched on the flexible substrate, and the film switch circuit and the light-emitting circuit are located on two sides of the flexible substrate. The thin film switch circuit and the light-emitting circuit are integrated on the flexible substrate, so that the overall thickness of the keyboard can be effectively reduced, and the requirement of lightness and thinness of the keyboard is met.

Further, the film switch circuit is a copper foil circuit pattern, the copper foil circuit pattern comprises a pair of rectangular-square-shaped copper foil circuits which are not in contact with each other and are perpendicular to each other and surround outwards, and each rectangular-square-shaped copper foil circuit is provided with at least one conductive contact.

Further, the film switch circuit is a copper foil circuit pattern, the copper foil circuit pattern comprises a pair of mutually non-contact and interlaced comb-tooth-shaped copper foil circuits, and each comb-tooth-shaped copper foil circuit is provided with at least one conductive contact.

In order to achieve the above purpose, the second technical scheme adopted by the utility model is as follows: a luminous keyboard comprises any one of the LED lamp sheets. Compared with the prior art, the light-emitting keyboard manufactured by the LED lamp piece is more compact in structure and thinner in thickness.

Drawings

Fig. 1 is a schematic circuit diagram of an LED lamp chip according to a first embodiment of the utility model;

FIG. 2 is an enlarged view of a portion of the package region of FIG. 1;

fig. 3 is a schematic structural diagram of a flexible substrate in an LED lamp sheet according to a first embodiment of the utility model;

fig. 4 is a schematic top view of a thin film switch circuit in an LED lamp strip according to a first embodiment of the utility model;

fig. 5 is a schematic top view of a thin film switch circuit in an LED lamp according to a second embodiment of the utility model.

In the figure:

1-a flexible substrate; 11-a packaging area; 111-point location; 2-a light emitting circuit; 21-a power bus; 22-a series conductor; 3-an LED; 31-an insulating body; 32-conductive terminals; 33-a light transmissive cover; 34-a light emitting chip; 35-internal drive IC; 41-Hui-line type copper foil circuit; 42-a conductive contact; 43-comb-tooth type copper foil circuit.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.

Example one

Referring to fig. 1-3, the present application provides an LED light sheet, comprising: the flexible substrate 1, flexible substrate 1 is equipped with a plurality of and a plurality of keyboard button position one-to-one encapsulated area 11 towards user's one side, and the opposite side etching has luminescent circuit 2. Each of the package regions 11 has at least one point 111 connected to the light emitting circuit, and each of the point 111 is soldered with an LED 3 with an internal driver ic (integrated circuit). Illustratively, two point sites 111 are shown in fig. 2 within a single encapsulation area 11.

As shown in fig. 3, the LED 3 with an internal driver IC includes an insulating main body 31, a conductive terminal 32, a transparent cover 33, a light emitting chip 34, and an internal driver IC 35. The insulating body 31 is fixed on the upper surface of the package region 11, and is provided with a conductive terminal 32 that is conducted to the point 111. The internal drive IC35 and the light emitting chip 34 are both fixed on the conductive terminals 32 by welding, and the internal drive IC35 and the light emitting chip 34 are electrically connected by a wire. The transparent cover 33 is a hollow semi-spherical structure or a square structure, and the transparent cover 33 covers the insulating body 31, and both ends of the transparent cover are fixed to the insulating body 32. The light-transmitting cover 33 can be fixed between the insulating main body 32 by clamping or screwing. The internal drive IC35 and the light emitting chip 34 are both located in the light-transmissive cover 33.

Specifically, the conductive terminal 32 includes a plurality of conductive pins embedded in the insulating main body 31, and the lower ends of the conductive pins extend out of the insulating main body 31 and are electrically contacted with the point 111; the upper ends of the plurality of conductive fillets extend out of the insulating body 31 and are commonly connected to a conductive pad. The internal drive IC35 and the light emitting chip are all welded on the conductive bonding pads.

The internal drive IC35 is arranged in the light-transmitting cover 33, the internal drive IC35 is directly electrically connected with the light-emitting chip 34 through a lead, the purpose of integrating the internal drive IC35 and the light-emitting chip 34 is achieved, independent control light emission of a single LED is achieved, the space occupied by an additional IC control module is reduced through the internal drive IC, thin production of products is facilitated, the internal drive IC35 and the light-emitting chip 34 are directly connected in the light-transmitting cover 33 through leads, and the light-emitting chip 34 emits light more stably and reliably.

In this embodiment, the light-transmitting cover 33 can be made of epoxy resin. The epoxy resin has high light transmittance, high refractive index, good heat resistance, moisture resistance, insulativity, high mechanical strength and chemical stability, and can realize good light transmittance function and good insulation protection performance.

With continued reference to fig. 1-2, the lighting circuit 2 includes a plurality of power buses 21 arranged in parallel, the plurality of power buses 21 being arranged in one-to-one correspondence with the plurality of package regions 11, each power bus 21 being configured to supply power to a corresponding package region 11. Each package region 11 is further provided with a series conductor 22, and the series conductor 22 is used for conducting all the point locations 111 in the package region 11. Independent power supply of the corresponding single packaging area 11 is realized through the plurality of power buses 21 arranged in parallel, and independent work of the LEDs in each packaging area 11 is ensured; the electrical connection of all the points 111 in the package region 11 is achieved by the series connection of the wires 22, so that all the LEDs in a single package region 11 can be lit or extinguished simultaneously.

In this embodiment, referring to fig. 1, a thin film switch circuit is further etched on the flexible substrate 1, and the thin film switch circuit and the light emitting circuit 2 are respectively located on two sides of the flexible substrate 1. The thin film switch circuit and the light-emitting circuit are integrated on the flexible substrate 1, so that the overall thickness of the keyboard can be effectively reduced, and the requirement of lightness and thinness of the keyboard is met.

Specifically, the film switch circuit is a copper foil circuit pattern, the copper foil circuit pattern includes a pair of mutually non-contact and mutually perpendicular outward-surrounding zigzag copper foil circuits 41, and each zigzag copper foil circuit 41 is provided with at least one conductive contact 42. In actual setting, the two rectangular-square-shaped copper foil lines 41 can be respectively set as a positive electrode line and a negative electrode line, and the positive electrode line and the negative electrode line are in a non-conduction state because the two rectangular-square-shaped copper foil lines are not in contact with each other; when a conductor connects the conductive contacts on the two rectangular-square-shaped copper foil circuits, the positive circuit and the negative circuit can be mutually conducted.

Copper foil circuit pattern adopts the direct whole preparation of etching process on flexible substrate, compares in traditional printed silver thick liquid circuit, can be applicable to harsh environment more, and because the etching process precision is higher, the line width and the line spacing of the copper circuit that it made compare in the printing can reduce by a wide margin (lines are more meticulous promptly), and then make two word returning line type copper foil circuit can arrange more densely on the prerequisite of not touching each other, and the clearance is littleer between two word returning line type copper foil circuit promptly. Thus, when the conductor abuts against the copper foil circuit pattern, the possibility that the conductor simultaneously contacts the two zigzag-shaped copper foil circuits is higher, the possibility that the conductive contacts on the two zigzag-shaped copper foil circuits are connected is higher, and the two zigzag-shaped copper foil circuits are easier to be connected.

In actual processing, the flexible substrate can be made of polyimide or polyester film as a base material. Because the polyimide or polyester film has excellent high and low temperature resistance and tensile strength, the prepared flexible substrate can have better bending degree, and therefore, the flexible substrate can be suitable for products with bending requirements.

In this embodiment, the flexible substrate 1 is further coated with an insulating adhesive layer on both sides, and the insulating adhesive layer is provided with through holes corresponding to the conductive contacts 42 and the points 111. The insulation protection of the flexible substrate, the light-emitting circuit and the thin film switch circuit is realized through the arrangement of the insulation glue layer, and the circuit damage caused by material oxidation is reduced.

Compared with the prior art, the LED in each packaging area is conveniently and electrically connected into the light-emitting circuit by arranging the point position communicated with the light-emitting circuit in each packaging area, and the LED with the internal drive IC is used for realizing the independent control of a single LED, so that the light-emitting function of a single key is realized; meanwhile, the internal drive IC is arranged in the light-transmitting cover, so that the installation space required by additionally arranging an IC master control module in the prior art is saved, and the overall thickness of the lamp piece is reduced; and integrate film switch circuit, luminescent circuit on a flexible substrate, can effectively reduce the whole thickness of keyboard, satisfy the demand that the keyboard is frivolous.

Example two

The difference between this embodiment and the first embodiment is: the copper foil circuit patterns are different.

Specifically, referring to fig. 5, the copper foil circuit pattern in the present embodiment includes a pair of mutually non-contact interdigitated comb-tooth-shaped copper foil circuits 43, and each of the comb-tooth-shaped copper foil circuits 43 is provided with at least one conductive contact 43. In actual design, the conductive contacts on the two comb-tooth-shaped copper foil lines 43 are more easily conducted the more densely the comb teeth of the two comb-tooth-shaped copper foil lines 43 are arranged to intersect.

EXAMPLE III

The keyboard with the LED lamp sheet comprises any one of the LED lamp sheets. Compared with the existing keyboard, the keyboard has the advantages of more compact structure and thinner thickness.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. An LED light sheet, comprising: the flexible substrate is provided with a plurality of packaging areas which correspond to the keyboard key positions one by one on one side facing a user, and a light-emitting circuit is etched on the other side; each packaging area is internally provided with at least one point location communicated with the light-emitting circuit, and an LED with an internal drive IC is welded on the point location.

2. The LED lamp chip as claimed in claim 1, wherein the light-emitting circuit comprises a plurality of power buses connected in parallel, the plurality of power buses are arranged in one-to-one correspondence with the plurality of package regions, and each power bus is configured to supply power to all points in the corresponding package region; and each packaging area is also internally provided with a series lead which is used for conducting all point positions in the packaging area.

3. The LED lamp chip as claimed in claim 2, wherein the LED with the driver IC comprises an insulating main body, a conductive terminal, the driver IC and a light emitting chip; the insulating main body is fixedly connected in the packaging area, and the conductive terminals which are communicated with the point positions are arranged on the insulating main body; the internal drive IC and the light-emitting chip are fixedly connected on the conductive terminals and are electrically connected through wires.

4. The LED light sheet of claim 3, wherein the LED with the driver IC further comprises a light-transmitting cover covering the insulating main body, and the conductive terminal, the driver IC and the light-emitting chip are all located in the light-transmitting cover.

5. The LED light chip as claimed in claim 4, wherein the light-transmitting cover is made of epoxy resin.

6. The LED light sheet according to any one of claims 1 to 5, wherein the flexible substrate is further coated with an insulating glue layer covering the light emitting circuit.

7. The LED lamp sheet according to any one of claims 1 to 5, wherein a thin film switch circuit is further etched on the flexible substrate, and the thin film switch circuit and the light emitting circuit are located on two sides of the flexible substrate.

8. The LED lamp strip as claimed in claim 7, wherein the thin film switch circuit is a copper foil circuit pattern, the copper foil circuit pattern comprises a pair of rectangular-square-shaped copper foil circuits which are not in contact with each other and are perpendicular to each other and surround outwards, and each rectangular-square-shaped copper foil circuit is provided with at least one conductive contact.

9. The LED light sheet according to claim 7, wherein the thin film switch circuit is a copper foil circuit pattern, the copper foil circuit pattern comprises a pair of mutually non-contact and interlaced comb-shaped copper foil circuits, and each of the comb-shaped copper foil circuits is provided with at least one conductive contact.

10. A light-emitting keyboard, comprising: comprising the LED light chip of any one of claims 1-9.