TWI382793B - Self-luminous circuit board structure - Google Patents

Description

Self-illuminating circuit board structure

The invention provides a self-illuminating circuit board structure, in particular to a circuit board structure for generating bright light for external projection, wherein a light emitting portion is laterally disposed inside the circuit board, and the bright light is laterally projected onto the circuit board. Improve the performance of the board's illumination.

At present, in this era of technological advancement, electronic products bring people a convenient environment. However, most input electronic products require buttons for inputting text, numbers or commands, such as mouse, keyboard or game. Applicable rocker, light gun, etc., but as the product changes with each passing day, the buttons need to be changed according to different needs, such as the keys used in the keyboard of the early desktop computer to the keys used in the notebook computer, The difference is quite large, because the notebook computer emphasizes that it is light, thin, short, and small, so the buttons used cannot be like the keyboard of a desktop computer, but must be changed according to the characteristics of the above notebook computer. .

In addition, if the button of the mobile phone is not able to emit light, but people will use the mobile phone in dimly lit places, but it is impossible to accurately press the required button, so that some manufacturers can improve the problem and make the button The light source can be emitted for convenient use by people. Please refer to the thirteenth figure. The illuminated keyboard is provided with a keyboard portion A and a backlight device B. The keyboard portion A is provided with a circuit board A2 above the bottom plate A1, and the circuit board A2 is provided. A light-emitting element A21 having a downward-emitting light source is disposed, and a plastic film A3 having an elastic member A31 is disposed above the circuit board A2, and the bottom plate A1 is further connected with a button A5 through the connecting mechanism A4, and then is connected to the keyboard portion A. A light guide plate B1 of the backlight device B is disposed under the bottom plate A1, and a reflection plate B2 is further disposed under the light guide plate B1.

The light-emitting element A21 of the circuit board A2 is a downward-emitting light source. The light source passes through the bottom plate A1 and is irradiated to the light guide plate B1 of the backlight device B. The light guide plate B1 projects the light source to the reflection plate B2, and the light source is reflected by the reflection plate B2. Then, the light guide plate B1 and the keyboard portion A are sequentially passed through, so that the button A5 at the top of the keyboard portion A has a bright light. However, since the keyboard component A and the backlight device B have many components, the keyboard portion A and the backlight device B are caused. After the combination of increased thickness, there are still many defects in actual use, such as:

(1) After the light-emitting element A21 of the circuit board A2 emits the light source downward, it undergoes multiple reflections and refractions, and finally the light is projected onto the button A5, but after the light source is repeatedly reflected, the light is mixed. And to reduce the brightness of the light source, resulting in loss of light, the light at the button A5 shows a poor effect.

(2) The thickness of the keyboard unit A plus the backlight device B increases, which is unsuitable and conforms to the design requirements of light, thin, short and small electronic devices, which will lead to an increase in the thickness of the keyboard of the electronic device. And thicker.

(3) The bottom plate A1 of the keyboard portion A is provided with a plurality of axle seats, and each axle seat needs to pass through the circuit board A2 to be assembled by the connecting mechanism A4, so that a plurality of perforations are required to be penetrated on the circuit board A2. The spatial position of the layout of the circuit is greatly reduced, and it is difficult, time-consuming and labor-intensive to design and manufacture.

(4) If a plurality of films are provided on the circuit board A2 of the keyboard portion A, and a power supply circuit and a signal transmission circuit are respectively disposed on different surfaces of the film, although it can be used to solve the lack of space shortage, the plurality of films need to be carried out. Sub-machining to set up a variety of circuits has led to a significant increase in manufacturing costs.

Therefore, the above-mentioned circuit board used in the illuminated keyboard has many problems and lacks, which is the object of the inventor and the person in charge of the industry.

Therefore, in view of the above-mentioned shortcomings, the inventors collected relevant information, and through multi-party evaluation and consideration, through continuous trial and modification, the transparent projection light source was designed in the circuit board to effectively enhance the brightness of the circuit board. The birth of the invention patent for the self-illuminating circuit board structure.

The main purpose of the present invention is that the circuit board is made of two substrates of light transmissive material, and one or more light guiding portions for uniformly transmitting light are disposed on the circuit board, and one or more light emitting portions are erected. The circuit layer is fixed on the circuit board for lateral projection of the light in the circuit board and then projecting outward through the light guiding portion, and the light emitting portion is disposed between the circuit boards and electrically connected to the circuit layer. Within the circuit board, the light-emitting portion is laterally illuminated to concentrate the light and then project outward from the light guiding portion, thereby reducing the optical loss phenomenon and gaining the brightness of the circuit board.

The secondary object of the present invention is that the circuit board is composed of two substrates having a light-transmissive material and different thicknesses, and the thickness of the upper substrate can be thinner than that of the lower substrate (the upper substrate can also be slightly thicker than the lower layer). a substrate), and one or more light guiding portions for uniformly transmitting light in the lower thick substrate, and one or more light emitting portions may be erected, and the light emitting portion may be a surface-adhesive light emitting diode ( The LED) is placed upright in the lower substrate.

In order to achieve the above objects and effects, the technical means and the configuration of the present invention will be described in detail with reference to the preferred embodiments of the present invention.

Please refer to the first, second, third and fourth figures, which are perspective exploded view, side exploded view, side cross-sectional view and stereoscopic view of the present invention. It can be clearly seen from the figure that it can be self-illuminating. The circuit board structure comprises at least a circuit board 1 and a circuit layer 2; wherein: the circuit board 1 has two oppositely arranged substrates 11 and 12, and the two substrates 11, 12 can be transparent and translucent. The material is formed, and one or more light-emitting portions 121 are disposed in the lower substrate 12, and one or more light-guiding portions 122 are disposed on the lower substrate 12, and insulation is provided between the two opposite substrates 11 and 12. In the layer 101, a combined space 10 can be formed between the two substrates 11 and 12.

The circuit layer 2 can be a flexible circuit board, and the internal line is provided with a predetermined signal and power supply line with a silver paste layer, and then combined into a line layout, which can effectively reduce the thickness of the circuit layer 2, so that the circuit layer 2 The thinner dimensions are presented, and a connecting portion 21 extending to the outside of the wiring layer 2 is provided on one side of the line layout.

When the above-mentioned components are assembled, the wiring layer 2 is accommodated and positioned in the combined space 10 between the substrates 11 and 12 of the circuit board 1, and can be isolated by the insulating isolation layer 101, and the wiring layout inside the wiring layer 2 is used. Electrically connected to the two substrates 11 and 12 and the respective light-emitting portions 121, that is, the circuit board 1 which can be self-illuminating according to the invention, is electrically connected to the external predetermined power supply by the connecting portion 21 of the circuit layer 2, The circuit layout of the circuit layer 2 is electrically connected to the two substrates 11 and 12 of the circuit board 1 and the light-emitting portion 121. The power supply line of the light-emitting portion 121 can be arranged along the line of the circuit layer 2 and extend to the outer side of the circuit layer 2. The portion 21 (please refer to the ninth, eleventh, and twelfth drawings at the same time); and the power line of the light-emitting portion 121 can also extend out of the outer side of the circuit board 1 at the side of the connecting portion 21 of the circuit layer 2, directly When the external power source is electrically connected, the light-emitting portion 121 can be transmitted through the circuit layer 2 to emit light laterally in the lower substrate 12, and the light source can be collectively projected into the light guiding portions 122 in the substrate 12 and transmitted through the light guiding portion. 122 guiding light source is uniformly projected outward, and the light emitting portion 121 is present When the light enters the substrate 12, the light is concentrated and is not easily scattered to the periphery. Then, the light source is guided by the light guiding portion 122, and the uniform guiding light is projected outward through the upper substrate 11, so that the luminous performance of the circuit board 1 can be gained. And having a good luminance of light, and constituting the structure of the circuit board 1 of the present invention.

The two oppositely stacked substrates 11 and 12 of the circuit board 1 may have thicknesses different in thickness, and the thickness of the upper substrate 11 is thinner than the thickness of the lower substrate 12 (the thickness of the upper substrate 11 may also be made). Slightly thicker than the thickness of the underlying substrate 12), and the substrates 11, 12 may be polycarbonate (PC), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) or the like. The light-shielding flexible material is formed; and the isolation insulating layer 101 disposed between the two substrates 11 and 12 is made of a transparent or translucent material, and the light of the light-emitting portion 121 can be transmitted.

As for the above circuit layer 2, it may be a flexible circuit board made of soft material, and the flexible circuit board may be two circuit boards of different line layouts, which are bonded and assembled into a circuit layer 2 by using conductive glue; and the flexible circuit board It can also be a single circuit board type, with different circuit layouts on the two sides, and then one side circuit board is folded and joined to the other side circuit board, and is bonded by conductive glue, or can be formed into the circuit layer 2.

Please refer to the first, second, fifth and sixth figures, which are perspective exploded view, side exploded view, and exploded perspective view of a preferred embodiment, and a side cross-sectional view of another embodiment. It can be clearly seen that the bottom plate 4 and the reflective layer 42 can be disposed under the circuit board 1. The outer peripheral edge of the bottom plate 4 is formed with an upwardly facing side wall 41 to form an accommodating space 40 therein, and adjacent to the accommodating space of the side wall 41. The positioning portion 411 is disposed on one side of the 40, and the circuit board 1, the circuit layer 2, the positioning plate 13, and the pressing member 15 are respectively disposed in the accommodating space 40 of the bottom plate 4 and located above the reflective layer 42 with the bottom plate. The positioning portion 411 of the fixing portion 411 of the circuit board 1 fixes the positioning plate 13 of the circuit board 1 to complete the assembly of the circuit board 1, the pressing member 15, and the bottom plate 4, so that the light generated by the light-emitting portion 121 in the substrate 12 can be reflected by the reflective layer. 42 is reflected upward to the circuit board 1, which can improve the effect of the light-emitting and brightening of the circuit board 1, and can also prevent the circuit board 1, the circuit layer 2 and the positioning board 13 from falling off and being damaged, thereby facilitating storage and handling of the finished product.

The substrates 11 and 12 and the circuit layer 2 of the circuit board 1 are disposed under the bottom plate 13, so that the circuit board 1 and the circuit layer 2 do not need to have too many through-holes, and even the board 1 and the line are reduced by the through-holes. The use area of the layer 2 is increased, and the circuit board 1 and the circuit layer 2 have a large area for the circuit layout, so that the space of the circuit board 1 and the circuit layer 2 is limited, and the line layout needs to occupy more space. Therefore, the layout of the circuit must be carefully calculated, resulting in time-consuming, labor-intensive, and manufacturing difficulties. It is also unnecessary to arrange the circuit layout on different surfaces of the two substrates 11, 12, and is isolated by the insulating isolation layer 101. The circuit board 1 and the circuit layer 2 can be improved in design and manufacture, and the effect of guiding light is enhanced.

The pressing member 15 can be made of a transparent or translucent material, and the pressing member 15 can be a key cap, a thin plate or other type, and the pressing member 15 can partially apply a lacquer layer on the upper surface to make the uncoated lacquer layer Forming a pattern or a brightened pattern, or applying a lacquer layer on the upper surface of the pressing member 15, and then forming a illuminable pattern and characters by laser engraving, which can only be pressed by the user after pressing the pressing member 15. The circuit layer 2 on the two sides of the insulating isolation layer 101 in the combination space 10 is touched by the elastic member 3, and the corresponding signal is emitted by the circuit layer 2, and the internal light source can be externally irradiated. That is, the scope of the patents of the present invention, such as the use of other modifications and equivalent structural changes, should be included in the scope of the patent of the present invention and incorporated in the specification.

3, 6, 7, and 8 are side cross-sectional views of the present invention, side cross-sectional views of another embodiment, side cross-sectional views of still another embodiment, and side of still another embodiment. Referring to the cross-sectional view, it can be clearly seen from the figure that the circuit board 1 of the present invention has at least one or more light guiding portions 122 disposed on the lower substrate 12, and may be a plurality of bumps, a wave-shaped continuous curved surface, and a continuous V-shaped groove. a light guiding ink or other light guiding structure capable of concentrating bright light; and the circuit board 1 is provided with one or more light guiding portions 122 on the upper surface (or lower surface) of the lower substrate 12, and the light guiding portion 122 is also The upper substrate 11 may be formed on the upper surface (or lower surface) of the upper substrate 11. The thickness of the upper substrate 11 is slightly thinner than the thickness of the lower substrate 12 (the thickness of the upper substrate 11 may be thicker than the thickness of the lower substrate 12). At least one or more of the light-emitting portions 121 may be provided in the thicker (or thinner) lower substrate 12, or at least one or more of the light-emitting portions 121 may be provided inside the upper substrate 11, and at least one or more may be utilized. The light emitting portion 121 is projected onto the upper substrate 11 and the lower substrate 12 with bright light. And each of the light guide portion 122 to be reflected to the pressing member 15 downward.

Further, the circuit board 1 is provided with a positioning plate 13 above the upper substrate 11, and a central hole 130 and a plurality of abutting portions 131 are respectively disposed on the positioning plate 13, and the abutting portions 131 are respectively pivotally connected to the linking device 14 The shaft portion 141 and the shaft portion 141 on the other side of each of the linking devices 14 are respectively pivotally disposed on the respective abutting portions 151 of the bottom surface of the plurality of pressing members 15. The plurality of pressing members 15 provided on the circuit board 1 can be keys. a cap, a metal plate or other buttons for pressing and touching; in addition, the surface of the upper substrate 11 of the circuit board 1 may be provided with an elastic member 3, and the upper portion of the elastic member 3 is located at the bottom of the plurality of pressing members 15 for After the pressing members 15 are pressed, the elastic members 3 are automatically restored by the elastic restoring force, and the interlocking devices 14 respectively disposed on the bottoms of the plurality of pressing members 15 can prevent the pressing members 15 from being dumped when pressed by an external force. It is skewed or snapped to match the elastic members 3 for each of the pressing members 15 to be quickly reset.

The elastic members 3 disposed above the circuit board 1 are respectively held under the plurality of pressing members 15, and when the plurality of pressing members 15 are respectively pressed downward by an external force, the pressing members 15 press the elastic members 3, so that the elastic members 3 are pressed by the pressing members 15. Each of the elastic members 3 touches the circuit layout of the corresponding circuit layer 2 of the bottom, because the circuit layer 2 is thin, and does not occupy too much position in the combined space 10 between the two substrates 11 and 12 of the circuit board 1, and The thickness of the circuit board 1 can be effectively reduced, and when the circuit layer 2 is pressed by the pressing member 15 against the elastic member 3, the circuit layout can be surely passed through the insulating layer 101, and pressed to form a contact conduction. Further, the signal is transmitted to the outside, and after the external force is released from each of the pressing members 15, the pressing members 15 are elastically reset by the elastic members 3, and the plurality of shielding portions 132 are disposed on the positioning plate 13, and each shielding is provided. The portions 132 are respectively opposite to the bottom of the gap position adjacent to each of the pressing elements 15 , and the shielding portion 132 is surely blocked above the upper substrate 11 to block the light source of each of the light-emitting portions 121 to avoid O generated between the pressing member 15 is projected outwardly gap, the light source can be prevented within a light-emitting section 121 is projected into the circuit board leakage, and concentrated to the bottom of the pressing member 15 is projected.

Referring to the third, ninth, tenth, eleventh, and twelfth drawings, the present invention is a side cross-sectional view of the present invention, a light-emitting state top view of the light-emitting portion, a partial enlarged view of the light-emitting portion, and another light-emitting state top view of the light-emitting portion. The light-emitting portion is further a top view of the light-emitting state. As is clear from the figure, the plurality of light-emitting portions 121 in the circuit board 1 of the present invention can be used in a vertical form by using a surface mount type (SMT) light-emitting diode (LED). Arranging in the same direction or separately in different directions, the plurality of light-emitting portions 121 can be unidirectionally illuminated or bi-directionally illuminated, so that the inside of the circuit board 1 has sufficient and uniform brightness; and the plurality of light-emitting portions 121 can also be staggered and different The directional arrangement is such that the plurality of light-emitting portions 121 can project bright light in the opposite direction, and the bright light is put into the circuit board 1, so that the circuit board 1 can be sufficiently illuminated.

The above self-illuminating circuit board structure of the present invention has the following advantages in practical use, such as:

(1) One or more light-emitting portions 121 may be vertically disposed in the lower substrate 12 of the circuit board 1, and each of the light-emitting portions 121 is laterally projected into the circuit board 1 so that the light source can be concentrated without scattering to the periphery, and does not need to pass through. Refraction can avoid the brightness loss of the light source, so as to improve the luminous efficiency of the circuit board 1 and the effect of bright light display.

(2) The circuit layer 2 is disposed in an interlayer manner in the existing circuit board 1, and the light-emitting portion 121 is disposed in an upright manner so as not to increase the thickness of the circuit board 1, and the circuit board 1 can conform to the light, thin, and short electronic products. , small design concept, for use.

(3) The circuit board 1 is internally provided with the circuit layer 2, which can effectively set the circuit layout required for the circuit board 1, and the circuit board 1 can reduce the arrangement of the through holes, and does not affect the line layout limitation on the circuit layer 2 or Reduced, so that board 1 can still meet the needs of electronic product line design.

(4) The circuit board 1 and the internal circuit layer 2, and using only one or more vertical light-emitting portions 121, can be quickly processed and assembled, without repeated processing operations, and can reduce manufacturing man-hours, Manpower, and increase the effect of the light on the board 1 light.

Therefore, the present invention is mainly directed to a self-illuminating circuit board structure, and the circuit layer 2 can be disposed between the two substrates 11 and 12 of the circuit board 1, and the circuit layer 2 is electrically connected to the light-emitting portion 121 located in the substrate 12. The light-emitting portion 121 is disposed at least one of the vertical portions in the substrate 12, and the light-emitting portion 121 can be laterally illuminated. The light source is projected into the circuit board 1 as a main protection focus, and the projection direction of the light source can be concentrated. Reducing the light loss caused by the light source to the surrounding scattering, but the above is only the preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention, so that it is simple to use the specification and the content of the present invention. Modifications and equivalent structural changes are all included in the scope of the patent of the present invention and are combined with Chen Ming.

In summary, the above self-illuminating circuit board structure of the present invention can achieve its efficacy and purpose during implementation and operation, so the invention is an invention with excellent practicability, and is an application for conforming to the invention patent.爰Proposing an application in accordance with the law, I hope that the trial committee will grant this case as soon as possible to protect the hard work of the inventor. If there is any doubt in the audit committee, please do not hesitate to give instructions, the inventor will try his best to cooperate with him.

1. . . Circuit board

10. . . Combined space

101. . . Isolation insulation

11. . . Substrate

12. . . Substrate

121. . . Light department

122. . . Light guide

13. . . Positioning plate

130. . . Center hole

131. . . Docking

132. . . Shading section

14. . . Linkage device

141. . . Shaft

15. . . Pressing element

151. . . Docking

2. . . Circuit layer

twenty one. . . Connection

3. . . Elastic component

4. . . Bottom plate

40. . . Housing space

41. . . Side wall

411. . . Positioning department

42. . . Reflective layer

A. . . Keyboard department

A1. . . Bottom plate

A2. . . Circuit board

A21. . . Light-emitting element

A3. . . Plastic film

A31. . . Elastic component

A4. . . Linkage mechanism

A5. . . button

B. . . Backlight device

B1. . . Light guide

B2. . . Reflective plate

The first figure is a perspective exploded view of the present invention.

The second figure is an exploded view of a side view of the present invention.

The third figure is a side cross-sectional view of the present invention.

The fourth figure is a three-dimensional appearance of the present invention.

Figure 5 is a perspective exploded view of a preferred embodiment of the present invention.

Figure 6 is a side cross-sectional view showing another embodiment of the present invention.

Figure 7 is a side cross-sectional view showing still another embodiment of the present invention.

Figure 8 is a side cross-sectional view showing still another embodiment of the present invention.

Fig. 9 is a plan view showing the light-emitting state of the light-emitting portion of the present invention.

The tenth figure is a partial enlarged view of the light-emitting portion of the present invention.

Fig. 11 is a plan view showing another light-emitting state of the light-emitting portion of the present invention.

Fig. 12 is a plan view showing still another state of illumination of the light-emitting portion of the present invention.

The thirteenth diagram is an exploded perspective view of the keyboard portion and the backlight device of the conventional illuminated keyboard.

1. . . Circuit board

10. . . Combined space

101. . . Insulation barrier

11. . . Substrate

12. . . Substrate

121. . . Light department

122. . . Light guide

13. . . Positioning plate

130. . . Center hole

131. . . Docking

14. . . Linkage device

141. . . Shaft

15. . . Pressing element

151. . . Docking

2. . . Circuit layer

twenty one. . . Connection

3. . . Elastic component

Claims (8)

A self-illuminating circuit board structure, in particular, a circuit board structure for generating bright light for external projection, comprising at least a circuit board and a circuit layer, wherein: the circuit board is provided with more than one guide light a light-transmitting portion that is evenly transmitted, and one or more light-emitting portions that project laterally bright light are erected in the circuit board; the circuit layer is fixed in the circuit board, and the circuit board is electrically connected The circuit layout of the conductive connection; the circuit board is provided with two stacked thick and different substrates, and the circuit layout of the circuit layer is disposed between adjacent faces of the two substrates, and the thicker substrate surface of the lower layer can be set There may be one or more light guiding portions and a light emitting portion may be provided inside. The self-illuminating circuit board structure according to the first aspect of the invention, wherein the light emitting part is in the two substrates of the circuit board, and one or more light emitting elements electrically connected to the line layout are provided, and the light emitting element is It is a surface-adhesive light-emitting diode and is placed in an upright substrate to be laterally illuminated. The self-illuminating circuit board structure as described in claim 1, wherein the two substrates of the circuit board are made of polycarbonate (PC), polyethylene terephthalate (PET), polymethyl Made of methyl acrylate (PMMA) or other flexible material with light guide. The self-illuminating circuit board structure according to claim 1, wherein the light guiding portion can be a plurality of bumps, a wavy continuous curved surface, and a continuous V-shaped concave portion. Slot, light guide ink or other light guiding structure. A self-illuminating circuit board structure, in particular, a circuit board structure for generating bright light for external projection, which comprises at least a circuit board and a circuit layer, wherein: the circuit board is provided with more than one guide a light guiding portion that is evenly transmitted through the light, and a pressing member that is pressed and reset after being disposed above each of the light guiding portions, and a light emitting portion that laterally projects bright light is erected in the circuit board; the circuit layer The device is fixed in the circuit board, and has a circuit layout for electrically pressing the circuit board after pressing the pressing component; the circuit board is provided with two stacked thick and different substrates, and is disposed on the two substrates. The circuit layout of the circuit layer is disposed between adjacent surfaces, and the lower substrate surface may be provided with more than one light guiding portion, and the inner portion may be provided with a light emitting portion. The self-illuminating circuit board structure according to claim 5, wherein the light emitting portion is disposed in the two substrates of the circuit board, and one or more light emitting elements electrically connected to the circuit layout are disposed, and the light emitting element is It is a surface-adhesive light-emitting diode and is placed in an upright substrate to be laterally illuminated. The self-illuminating circuit board structure according to claim 5, wherein the two substrates of the circuit board are made of polycarbonate (PC), polyethylene terephthalate (PET), polymethyl Made of methyl acrylate (PMMA) or other flexible material with light guide. The self-illuminating circuit board structure according to claim 5, wherein the light guiding portion may be a plurality of bumps, a wave-shaped continuous curved surface, a V-shaped groove, a light guiding ink or other light guiding structure.