CN110764192A - Optical membrane switch device - Google Patents

Abstract

An optical thin film switching device includes a first thin film layer, a second thin film layer, and a spacer layer. The first thin film layer comprises a first surface and a plurality of light incoming lines, the light incoming lines are arranged on the first surface, and a plurality of first bypass lines extend from each light incoming line in the inclined direction. The second thin film layer comprises a second surface and a plurality of light emitting lines, the light emitting lines are arranged on the second surface, a plurality of second side branch lines extend out of each light emitting line in the inclined direction, and the second side branch lines respectively extend to the first side branch lines to form a plurality of touch areas. The spacing layer is positioned between the first film layer and the second film layer and comprises a plurality of through holes respectively corresponding to the touch pressure areas. The corresponding first side branch line and the second side branch line in the through hole are at least partially laminated and keep a preset distance from each other.

Description

Optical membrane switch device

[ technical field ] A method for producing a semiconductor device

The present invention relates to a switch device, and more particularly, to an optical film switch device.

[ background of the invention ]

The keyboard is a very common input device at present, and is usually used in combination with an electronic device, such as a desktop computer, a notebook computer, a smart phone, a tablet computer, or the like. With the trend of light and thin electronic devices, most of the keyboards employ thin film switches with small size, thickness and weight.

Generally, the main structure of the membrane switch is formed by laminating 3 layers of membranes, and the opposite surfaces of the upper membrane and the lower membrane are respectively printed with a conductive circuit and a conductive contact point, and the conductive contact point corresponds to the position of a key. The middle layer is an insulating layer, which can prevent the upper and lower layers from directly contacting each other to cause short circuit. When a user presses down the keys of the keyboard, the upper film is squeezed, so that the conductive contact points corresponding to the upper film and the lower film are contacted with each other, and thus the conductive circuits of the upper film and the lower film are conducted to generate signals corresponding to the pressed keys.

However, the conductive contact is easily worn and oxidized, and is easily affected by dust, so that the sensitivity of the key is reduced, and the conventional key has a problem of waterproof property, so that the quality of the keyboard input is greatly reduced. On the other hand, when a plurality of keys are pressed simultaneously, a signal indicating that the pressed key is not pressed is detected by the reverse feedback of the circuit, or a correct combined key signal cannot be determined when the plurality of keys are pressed together, which causes a Ghost key (Ghost key) phenomenon.

[ summary of the invention ]

In one embodiment, an optical thin film switching device is provided that includes a first thin film layer, a second thin film layer, and a spacer layer. The first thin film layer comprises a first surface and a plurality of light incoming circuits, the light incoming circuits are arranged on the first surface, each light incoming circuit is provided with a light incoming end, and a plurality of first side branch lines extend from each light incoming circuit in the inclined direction. The second thin film layer comprises a second surface and a plurality of light emitting lines, the light emitting lines are arranged on the second surface, the second surface and the first surface are arranged in opposite directions, each light emitting line is provided with a light sensing end, a plurality of second side branch lines extend out of each light emitting line in an inclined mode, and the second side branch lines respectively extend to the first side branch lines to form a plurality of touch areas. The spacing layer is arranged between the first surface of the first film layer and the second surface of the second film layer, and comprises a plurality of through holes respectively corresponding to the plurality of touch pressure areas. The corresponding first side branch lines and the corresponding second side branch lines in the through holes are at least partially laminated and keep a preset distance from each other. The touch areas can be selectively pressed, so that the corresponding first side branch lines and the corresponding second side branch lines are mutually laminated and contacted in the through holes to conduct light, and the light transmitted from the light inlet end can be transmitted to the light sensing ends through the light inlet circuits, the first side branch lines, the second side branch lines and the light outlet circuits.

In summary, according to the optical thin film switch device of the embodiment of the invention, when each touch area is pressed, each corresponding first side branch line and each corresponding second side branch line are in laminated contact with each other to guide light, so that the light transmitted from the light incident end can be transmitted to the light sensing end to generate a corresponding signal according to the light guiding state. In addition, through at least partial lamination of the corresponding first side branch line and the second side branch line in each through hole, the first side branch line and the second side branch line can be ensured to be contacted with each other when each touch area is pressed, and the pressing force of the touch area can be further judged according to the lamination contact area of the first side branch line and the second side branch line.

[ description of the drawings ]

FIG. 1 is an exploded perspective view of an embodiment of an optical membrane switch device according to the present invention.

FIG. 2 is a schematic partial circuit diagram of an optical thin film switch device according to an embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of an optical thin-film switch device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of light guiding of an optical thin-film switch device according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of circuit conduction of an optical thin film switch device according to an embodiment of the present invention.

FIG. 6 is a schematic triggering diagram of an optical thin-film switch device according to an embodiment of the present invention.

FIG. 7 is a schematic triggering diagram of another embodiment of the optical thin-film switching device of the present invention.

FIG. 8 is a schematic diagram of circuit conduction of another embodiment of the optical thin film switching device of the present invention.

FIG. 9 is a schematic diagram of circuit conduction of an optical thin film switch device according to another embodiment of the present invention.

FIG. 10 is an exploded perspective view of another embodiment of the optical membrane switch device of the present invention.

FIG. 11 is a schematic plan view of another embodiment of the optical thin film switching device of the present invention.

[ detailed description ] embodiments

Fig. 1 is an exploded perspective view of an embodiment of an optical thin film switching device of the present invention, fig. 2 is a partial circuit diagram of the embodiment of the optical thin film switching device of the present invention, and fig. 3 is a partial cross-sectional diagram of the embodiment of the optical thin film switching device of the present invention.

As shown in fig. 1 to 3, the optical thin film switch device 1 is a multi-layer thin film structure, and includes a first thin film layer 10, a second thin film layer 20, and a spacer layer 30. The whole optical thin-film switch device 1 can be made into rectangle, square, round or other irregular shapes according to the actual design of the product. For example, in the present embodiment, the optical film switch device 1 is applied to a computer keyboard, and is made into a rectangular shape according to the shape of the computer keyboard, but is not limited thereto.

As shown in fig. 1, in the present embodiment, the first film layer 10 is located at the topmost layer, the second film layer 20 is located at the bottom layer, and the spacing layer 30 is sandwiched between the first film layer 10 and the second film layer 20, for example, the spacing layer 30 can be adhered between the first film layer 10 and the second film layer 20 through adhesive. However, in some embodiments, the upper and lower disposition relationship of the first thin film layer 10 and the second thin film layer 20 of the optical thin film switching device 1 may be changed according to actual requirements. Taking the optical film switch device 1 as an example of a keyboard, the first film layer 10 is close to the keys of the keyboard, and the second film layer 20 is relatively close to the bottom plate of the keyboard. Alternatively, the first film layer 10 may be adjacent to the bottom panel of the keyboard and the second film layer 20 may be relatively adjacent to the keys of the keyboard, but is not limited thereto.

Referring to fig. 1 and fig. 2, the first thin film layer 10 includes a first surface 11 and a plurality of light incident lines 12, in this embodiment, the first surface 11 is a lower surface of the first thin film layer 10 (if the first thin film layer 10 is a bottom layer, the first surface 11 is an upper surface of the first thin film layer 10), and the plurality of light incident lines 12 are disposed on the first surface 11. For example, the light incident lines 12 are formed by disposing a light guide material (such as an inorganic polymer light guide material, an organic polymer light guide material, or an organic-inorganic hybrid light guide material) on the first surface 11 through a printing or etching process. In some embodiments, the first film layer 10 may be a film made of a plastic material such as Polyimide (Polyimide), polyethylene terephthalate (polyethylene terephthalate), or Polycarbonate (Polycarbonate). In some embodiments, the refractive index of each light incident circuit 12 may range from 1.6 to 4, for example, each light incident circuit 12 may be made of a light guide material with high refractive index such as nano titanium dioxide ink, titanium dioxide or silicon.

As shown in fig. 1 and fig. 2, the second thin film layer 20 includes a second surface 21 and a plurality of light-emitting lines 22, and the second surface 21 is disposed opposite to the first surface 11. In the present embodiment, the second surface 21 is an upper surface of the second thin film layer 20 (if the second thin film layer 20 is the topmost layer, the second surface 21 is a lower surface of the second thin film layer 20), and the plurality of light-emitting lines 22 are disposed on the second surface 21. For example, the light emitting lines 22 are formed by disposing a light guide material (such as an inorganic polymer light guide material, an organic polymer light guide material, or an organic-inorganic hybrid light guide material) on the second surface 21 through a printing or etching process. In some embodiments, the second film layer 20 may be a film made of a plastic material such as Polyimide (Polyimide), Polyethylene terephthalate (Polyethylene terephthalate), or Polycarbonate (Polycarbonate). In some embodiments, the refractive index of each light-emitting line 22 may also be in a range of 1.6 to 4, for example, each light-emitting line 22 may be made of a light-guiding material with high refractive index such as nano titanium dioxide ink, titanium dioxide or silicon.

According to Snell's law, when light enters a low refractive index material (optically thinner medium) from a high refractive index material (optically denser medium), if the incident angle is larger than the critical angle, the light does not refract into the low refractive index medium, but is continuously Totally Internally Reflected (TIR) in the high refractive index medium. According to the embodiment of the present invention, each of the light-in circuits 12 and each of the light-out circuits 22 may be printed on the first thin film layer 10 and the second thin film layer 20 respectively by using a material with a high refractive index, that is, the refractive index of each of the light-in circuits 12 and each of the light-out circuits 22 is greater than that of the first thin film layer 10, the second thin film layer 20, the spacer layer 30 and the surrounding medium such as air. Therefore, when light is transmitted in the light incident circuit 12 or the light emergent circuit 22, the light can be totally internally reflected in the light incident circuit 12 and the light emergent circuit 22 to avoid leaking outwards, so as to prevent light loss and improve the accuracy of signal detection.

As shown in fig. 2, the present embodiment is a partial circuit diagram of the optical thin film switch device 1, and the plurality of light-in circuits 12 and the plurality of light-out circuits 22 are disposed in a staggered manner. For example, as shown in fig. 1, the plurality of light-incident lines 12 may be respectively disposed on the first surface 11 along the X-axis direction (not shown in the figure), and the plurality of light-exiting lines 22 may be respectively disposed on the second surface 21 along the Y-axis direction (not shown in the figure), so that the plurality of light-incident lines 12 and the plurality of light-exiting lines 22 are arranged in a staggered manner, but not limited thereto.

As shown in fig. 1 to 3, the first thin film layer 10 may have a plurality of first key corresponding regions 18, the first key corresponding regions 18 are regions of the first thin film layer 10 corresponding to the plurality of keys 2, each light incident line 12 has a light incident end 13, and each light incident line 12 extends from a plurality of first side branches 14 to each first key corresponding region 18 in an oblique direction. Thus, referring to fig. 2 and 4, since each light incident line 12 and the first bypass line 14 are made of light-guiding material, when external light is transmitted from each light incident end 13, the external light can be guided to the first bypass line 14 through each light incident line 12 (as shown in fig. 4). In an embodiment, as shown in fig. 5, each light incident end 13 of each light incident circuit 12 may be respectively connected to a light emitting source 15 (such as an LED lamp, a fluorescent lamp, or an infrared lamp), and the light emitting source 15 can emit light to be transmitted into the light incident circuit 12 from the light incident end 13, but the present embodiment is not limited thereto, and each light incident end 13 of each light incident circuit 12 may also be connected to the same light emitting source 15.

As shown in fig. 1 to 3, the second film layer 20 may have a plurality of second key corresponding regions 28 corresponding to the plurality of first key corresponding regions 18 of the first film layer 10, each light emitting line 22 has a light sensing end 23, each light emitting line 22 extends in an oblique direction to form a plurality of second side branches 24, and the second side branches 24 respectively extend to below the plurality of first side branches 14 on the first film layer 10 to form a plurality of touch regions T. As shown in fig. 3, the touch area T is a region where each first side branch 14 and each second side branch 24 correspond to the trigger 3 of the key 2, in this example, the trigger 3 is an elastic body (Rubber dome), but may also be a Metal dome or a mechanical switch, and is not limited thereto.

As shown in fig. 1 and 3, the spacing layer 30 includes a plurality of through holes 31 corresponding to the plurality of touch-pressure regions T, and the first and second bypass lines 14 and 24 corresponding to each through hole 31 are at least partially stacked and maintained at a predetermined distance from each other. In the present embodiment, the first bypass lines 14 and the second bypass lines 24 corresponding to the through holes 31 are stacked over the entire area, but the present invention is not limited thereto. Therefore, since the light emitting line 22 and the second side branch line 24 are made of the same light guide material, when the touch pressure region T is pressed, the corresponding first side branch line 14 and the second side branch line 24 can be in laminated contact with each other in the through hole 31 to guide light, so that the light transmitted from the light inlet end 13 can be transmitted to the light sensing end 23 through the light incident line 12, the first side branch line 14, the second side branch line 24 and the light emitting line 22, and then the corresponding key signal is generated according to the light guide state. This is further detailed in conjunction with the drawings as follows.

Referring to fig. 3 to 5, in the present embodiment, the light incident end 13 of each light incident line 12 is located on the same side of the optical thin film switch device 1, and the light sensing end 23 of each light emergent line 22 is located on the same side of the optical thin film switch device 1 and connected to a light sensor 25. The light sources 15 sequentially emit light, so that the light is transmitted into the light-incident line 12 from the light-incident end 13 and guided to each first bypass line 14 (as shown in fig. 4). Referring to fig. 5 and 6, when one of the keys 2 is pressed (e.g., the key 2 at the upper left corner in fig. 5 is pressed), the trigger 3 may be pressed downward against the corresponding pressing area T, so that the first branch line 14 and the second branch line 24 approach each other in the through hole 31 and are in laminated contact (as shown in fig. 6), and further the light in the first branch line 14 can be transmitted to the second branch line 24 and to the light sensing terminal 23 through the light emitting line 22, and the light sensor 25 can receive the light and output the light sensing signal correspondingly, so that it can be determined which key 2 is pressed according to the light sensing signal to generate the function signal of the pressed key correspondingly.

Therefore, the optical membrane switch device 1 of the present embodiment generates the signal of the key 2 through the optical conduction mode, and compared with the conventional conductive contact type membrane switch, the waterproof function can be achieved without a circuit, and the problems of abrasion and oxidation of the conductive contact point can be avoided, which causes the decrease of the key sensitivity. Furthermore, by at least partially laminating the corresponding first and second side branch lines 14 and 24 in the through hole 31, it can be ensured that the corresponding first and second side branch lines 14 and 24 can be in laminated contact with each other to guide light when each touch pressure region T is pressed, so that the light guiding efficiency is good, and the problem of light leakage or dislocation is not generated. In addition, the pressing force of each pressing region T can be further judged according to the lamination contact area of the first side branch line 14 and the second side branch line 24. As shown in fig. 6 and 7, when the pressing force of the pressing region T is larger, the lamination contact area of the first side branch line 14 and the second side branch line 24 is larger, for example, the pressing force of the pressing region T of fig. 7 is larger than the pressing force of the pressing region T of fig. 6, so that the lamination contact area of the first side branch line 14 and the second side branch line 24 of fig. 7 is larger than the lamination contact area of the first side branch line 14 and the second side branch line 24 of fig. 6 to increase the light guide area, and further increase the signal intensity value of the light sensing signal output by the light sensor 25, that is, the light sensing signal is proportional to the lamination contact area of the corresponding first side branch line 14 and the corresponding second side branch line 24, so that the pressing force of the pressing region T can be determined according to the signal intensity value of the light sensing signal, so as reference information for other applications.

As shown in fig. 6 and 7, in one embodiment, the refractive index of each second branch line 24 of the light exiting line 22 is higher than or equal to the refractive index of the first branch line 14 of the light entering line 12. That is, according to the characteristic that light is easily transmitted from the low refractive index to the high refractive index, when each of the touch pressure regions T is pressed so that the corresponding first and second side branch lines 14 and 24 are in laminated contact with each other in each of the through holes 31, since the refractive index of each of the second side branch lines 24 is higher than or equal to the refractive index of the first side branch line 14, light is easily transmitted from the first side branch line 14 to the second side branch line 24, and the light guiding efficiency and the accuracy of signal detection are improved.

As shown in fig. 6 and 7, in an embodiment, each light-incident line 12 of the first thin film layer 10 and each light-exiting line 22 of the second thin film layer 20 may be a single-layer line structure, in which the refractive index of each light-incident line 12 is higher than the refractive indices of the first thin film layer 10 and the spacer layer 30. The refractive index of each light-emitting line 22 is higher than the refractive index of the second thin film layer 20 and the spacer layer 30, so as to prevent light from being guided to the first thin film layer 10, the second thin film layer 20 or the spacer layer 30 when light is transmitted in each light-entering line 12 and each light-emitting line 22, and avoid the influence of light energy loss on the accuracy of signal detection.

Referring to fig. 2, in the present embodiment, a plurality of first branch lines 14 extend from the same side of each light incident line 12, and in addition, each light incident line 12 extends obliquely from a direction away from each light incident end 13 and close to each light sensing end 23 to form a plurality of first branch lines 14. Each light emitting line 22 also extends from the same side to form a plurality of second side branch lines 24, and each light emitting line 22 extends obliquely to form a plurality of second side branch lines 24 in a direction away from each light sensing end 23 and close to each light incident end 13. Thus, the optical thin-film switch device 1 can further achieve the function of a ghost key (ghost key) by the circuit configuration of the present embodiment, where the ghost key is a situation where the pressed key 2 is detected with a pressing signal or a correct signal cannot be determined when a plurality of keys 2 are pressed simultaneously, and the details are described below with reference to the drawings.

As shown in fig. 8, in the present embodiment, when three keys 2 are pressed simultaneously (for example, the keys 2 at the upper left, the upper right and the lower right in the figure are pressed), first, the light source 15 at the leftmost side in the figure emits light, so that the corresponding light is transmitted into the light-entering line 12 from the light-entering end 13 and guided to each first bypass line 14, and then the light in the first bypass line 14 is transmitted to the second bypass line 24 and transmitted to the light-sensing end 23 through the light-emitting line 22, so that the corresponding light sensor 25 at the upper left receives the light and correspondingly outputs the light-sensing signal, thereby determining that the upper left key 2 is pressed. Moreover, based on the linear propagation characteristic of light, the light in the first side branch line 14 will not be transmitted in the direction away from the light sensing end 23 after being transmitted to the second side branch line 24, so that the light is prevented from being reversely fed back to be transmitted to the left lower light sensor 25 through the key 2 which is turned on from the upper right to the lower right, and the key 2 which is turned on from the lower left is prevented from being pressed, so that the occurrence of ghost keys can be avoided.

Next, as shown in fig. 9, the light source 15 on the right side in the figure is changed to emit light, so that the corresponding light is introduced into the light-entering end 13 and guided to the two first side branch lines 14 corresponding to the upper right and lower right keys 2, the light in the two first side branch lines 14 can be transmitted to the second side branch line 24 and transmitted to the two light-sensing ends 23 through the light-emitting line 22, at this time, the corresponding upper and lower light sensors 25 can receive the light and output the light sensing signals correspondingly, so as to determine that the upper right and lower right keys 2 are pressed, and thus, the optical film switch device 1 of the present embodiment does not sense the signals corresponding to the keys 2 that are not pressed, thereby avoiding the generation of error signals, and achieving the function of preventing ghost keys.

In some embodiments, the light sources 15 can emit light with the same or different optical characteristics (such as wavelength, frequency or color). For example, each light emitting source 15 can emit light rays with different optical characteristics at the same time, so that each light sensor 25 can output different light sensing signals according to the light rays with different optical characteristics to determine which keys 2 are pressed.

As shown in fig. 10, in one embodiment, the optical thin film switch device 1 may include a key film layer 40(key film), wherein the key film layer 40 may be a film body on which letters, numbers or characters are printed, the key film layer 40 may be laminated on the first film layer 10 or the second film layer 20 (here, under the second film layer 20), and the first film layer 10, the second film layer 20 and the spacer layer 30 may be made of transparent materials, so that the letters, numbers or characters on the key film layer 40 may be displayed on each of the transparent keys 2 after the key film layer 40 receives light for the user to press. Therefore, when a user needs to use a keyboard with different languages or functions, the user only needs to replace the character key film layer 40 with the corresponding other character key film layer 40, and the convenience in use and the cost saving are achieved without replacing the whole keyboard.

Referring to fig. 1 and 11, in an embodiment, the first film layer 10 includes a first wire outlet 16, the first wire outlet 16 can integrally extend from one side of the first film layer 10, for example, the first film layer 10 and the first wire outlet 16 can be integrally formed by machining (e.g., punching or cutting). The first outlet terminal 16 is provided with a first light guiding connector 17, the first light guiding connector 17 has a plurality of first light guiding holes 171, and the light inlet terminal 13 of each light inlet circuit 12 extends to the first outlet terminal 16 and corresponds to the first light guiding holes 171 of the first light guiding connector 17. The second film layer 20 includes a second wire outlet 26, the second wire outlet 26 can be integrally extended from one side of the second film layer 20, for example, the body of the second film layer 20 and the second wire outlet 26 can be integrally manufactured by machining (for example, stamping or cutting). The second wire outlet 26 is provided with a second light guiding connector 27, the second light guiding connector 27 has a plurality of second light guiding holes 271, and the light sensing terminal 23 of each light emitting line 22 extends to the second wire outlet 26 and corresponds to the second light guiding holes 271 of the second light guiding connector 27.

Thus, as shown in fig. 11, the optical thin-film switch device 1 can be connected to the light guide connectors 4 and 5 of an external electronic component (e.g., a tablet computer) through the first light guide connector 17 and the second light guide connector 27, and the light source 15 and the light sensor 25 can be disposed inside the external electronic component, so as to emit light to the optical thin-film switch device 1 through the light guide connector 4 and the first light guide connector 17, and then receive the light generated by the touch and press of the key 2 through the light guide connector 5 and the second light guide connector 27, and transmit the light to the external electronic component and convert the light into a required electrical signal. Since the optical membrane switch device 1 and the external electronic components are connected through the non-contact photoconductive optical holes (the first light guide connector 17 and the light guide connector 4, the second light guide connector 27 and the light guide connector 5), the external electronic components and the optical membrane switch device 1 can be easily designed to be waterproof. Moreover, the keyboard applied to the optical membrane switch device 1 does not need to be provided with the light source 15 and the light sensor 25, so that the effect of complete water resistance can be achieved.

Referring to fig. 11, in some embodiments, to reduce the number of the first light guide holes 171 and the second light guide holes 271, the first light guide holes 171 and the second light guide holes 271 may be designed as light guide holes allowing light with two or more different wavelengths to pass through, and the light filters 29 are respectively disposed on the light incident end 13 of the light incident line 12 of the first thin film layer 10 and the external electronic component adjacent to the light sensor 25. Thus, the light of different frequencies can share the same light guide hole by the arrangement of the transmission filter 29, so as to further reduce the number of the first light guide holes 171 and the second light guide holes 271.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit of the invention.

[ notation ] to show

1 optical membrane switch device

2 push-button

3 triggering part

4. 5 light guide connector

10 first film layer

11 first surface

12 light incident circuit

13 light incident end

14 first side branch

15 light emitting source

16 first outlet terminal

17 first light guide connector

171 first light guide hole

18 first key corresponding region

20 second film layer

21 second surface

22 light-emitting circuit

23 photosensitive end

24 second side branch line

25 light sensor

26 second outlet terminal

27 second light guide connector

271 second light guide hole

28 second key corresponding region

29 optical filter

30 spacer layer

31 through hole

40-key film layer

T-touch area

Claims (12)

1. An optical membrane switching device, comprising:

the first thin film layer comprises a first surface and a plurality of light incoming lines, the light incoming lines are arranged on the first surface, each light incoming line is provided with a light incoming end, and a plurality of first bypass lines extend from each light incoming line in the inclined direction;

the second film layer comprises a second surface and a plurality of light-emitting lines, the light-emitting lines are arranged on the second surface, the second surface and the first surface are arranged in opposite directions, each light-emitting line is provided with a light-sensing end, each light-emitting line also obliquely extends out of a plurality of second side branch lines, and the second side branch lines respectively and correspondingly extend to the first side branch lines to form a plurality of touch areas; and

a spacing layer disposed between said first surface of said first film layer and said second surface of said second film layer, said spacing layer including a plurality of through-holes corresponding respectively to said plurality of touch-pressure regions, each of said first branch lines and each of said second branch lines corresponding in each of said through-holes being at least partially stacked and at a predetermined distance from each other;

each touch area can be selectively pressed, so that each corresponding first side branch line and each corresponding second side branch line are mutually laminated and contacted in each through hole to conduct light, and light transmitted from each light inlet end can be transmitted to each light sensing end through each light inlet line, each first side branch line, each second side branch line and each light outlet line.

2. An optical membrane switch device as claimed in claim 1, wherein each of said photosensitive ends is further connected to an optical sensor for outputting an optical sensing signal.

3. An optical membrane switch device as claimed in claim 2 wherein the light sensing signal has a signal strength value proportional to the lamination contact area of each corresponding first bypass line and each second bypass line.

4. The optical membrane switch device according to claim 2, further comprising a plurality of optical filters, wherein each of the optical filters is disposed at each of the light incident ends and adjacent to each of the light sensors.

5. An optical thin film switching device as claimed in claim 1, wherein each of the incoming lines extends from a same side thereof in an oblique direction to the first plurality of side branch lines, and each of the outgoing lines extends from a same side thereof in an oblique direction to the second plurality of side branch lines.

6. An optical film switch device as claimed in claim 1, wherein the plurality of light-in circuits and the plurality of light-out circuits are arranged in a staggered manner, each of the light-in circuits extends obliquely out of the plurality of first side branch lines in a direction away from each of the light-in ends and close to each of the light-sensing ends, and each of the light-out circuits extends obliquely out of the plurality of second side branch lines in a direction away from each of the light-sensing ends and close to each of the light-in ends.

7. The optical film switch device as claimed in claim 1, wherein each of the light incident ends is further connected to a light emitting source, and the light emitting sources emit light simultaneously or sequentially.

8. The optical film switch device as claimed in claim 1, wherein each of the light incident ends is further connected to a light emitting source, and the light emitting sources emit light beams with the same or different optical characteristics.

9. An optical membrane switch device according to claim 1 wherein the refractive index of each of the second side branch lines is higher than or equal to the refractive index of each of the first side branch lines.

10. An optical thin film switching device according to claim 1, wherein the refractive index of each incoming line is higher than the refractive indices of the first thin film layer and the spacer layer, and the refractive index of each outgoing line is higher than the refractive indices of the second thin film layer and the spacer layer.

11. An optical membrane switching device according to claim 1 and further comprising a layer of key film laminated to said first film layer or said second film layer, said first film layer, said second film layer and said spacer layer being made of a light transmissive material.

12. The optical film switch device of claim 1, wherein the first film layer includes a first wire outlet end, the first wire outlet end is provided with a first light guiding connector, the first light guiding connector has a plurality of first light guiding holes, the plurality of light inlet ends of the plurality of light inlet lines extend to the first wire outlet end and correspond to the plurality of first light guiding holes of the first light guiding connector, the second film layer includes a second wire outlet end, the second wire outlet end is provided with a second light guiding connector, the second light guiding connector has a plurality of second light guiding holes, and the plurality of light sensing ends of the plurality of light outlet lines extend to the second wire outlet end and correspond to the plurality of second light guiding holes of the second light guiding connector.

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