A light guide plate optical switch and a light guide plate array optical switch module

Abstract

An optical waveguide light switch and an optical waveguide array light switch module, comprising an optical transmitter, an optical receiver, a circuit chip, an optical switch, and an optical waveguide. The optical signal emitted by the optical transmitter is optically conducted to the optical receiver through the optical switch. When the optical switch is triggered, the propagation optical path between the optical transmitter and the optical receiver is switched on and off. The optical waveguide is divided into multiple optical regions, and the optical signals in the multiple optical regions are isolated from each other. In each optical region, multiple optical transmitters are respectively optically conducted to a group of optical receivers or to an optical receiver. The optical transmitter is connected to the output port of the CPU, and the optical receiver is connected to the input port of the CPU. A thin-film optical switch with simple manufacturing process and low production cost is provided, especially a thin-film optical switch with a long service life and ultra-thin thickness, which can be widely applied to PC keyboards, thin-film keyboards, and thin-film notebook keyboards.

Description

[0001] Priority claim: Claim 3 of the present invention claims the priority of the patent application with the patent number 2019103655544 filed with the China Patent Office on May 1, 2019;

[0002] Claims 8 and 9 of the present invention claim the priority of the patent application with the patent number 2019106323023 filed with the China Patent Office on July 13, 2019. Technical Field

[0003] The present invention relates to a thin film array optical switch and a key switch using the thin film array optical switch, and particularly to a thin film array optical switch installed in a keyboard which is an input device of an electronic instrument. Background Art Background Art

[0004] Existing keyboards generally adopt thin film matrix circuits with metal contacts. Thin film matrix circuit keyboards with ultra-thin designs account for 99% of the keyboard market. The thin film matrix circuit is composed of two circuit films and one isolation film. Among them, the circuit films are composed of two films respectively screen-printed with silver paste matrix circuits and silver paste contacts. There are through holes on the isolation film. The isolation film is located between the two circuit films and is bonded to the two circuit films respectively. The two circuit films are composed of an upper circuit film and a lower circuit film. The positions of the silver paste contacts on the upper circuit film, the silver paste contacts on the lower circuit film, and the through holes on the isolation film correspond to each other. When in use, under the action of an external force, the silver paste contacts on the upper circuit film and the silver paste contacts on the lower circuit film come into contact within the through holes on the isolation film, and the switch is turned on. When the external force is removed, the silver paste contacts on the upper circuit film reset, and the switch is turned off. The silver paste contacts of the existing contact type thin film array switch circuit are prone to oxidation, wear, and have a short service life.

[0005] Thin film matrix circuits are widely used in laptop keyboards and desktop thin film keyboards. Desktop keyboards mainly include desktop thin film keyboards and desktop mechanical keyboards. Among them, desktop thin film keyboards belong to mid-range and low-end keyboards, and desktop mechanical keyboards belong to high-end keyboards. Desktop thin film circuit keyboards occupy most of the market.

[0006] Problems existing in the existing thin film matrix circuit:

[0007] 1. The silver paste contacts of the existing thin film matrix circuit are prone to oxidation, wear, have a short service life, and there are problems such as electrical jitter;

[0008] a. The silver paste contacts are prone to oxidation: The oxidation of metals is a common phenomenon in nature. For example, in a TV remote control with the same working principle as a keyboard, the buttons of a newly purchased remote control are highly sensitive and have a good feel. However, after several years of use, the sensitivity is significantly reduced, the feel is also poor, and even some buttons of the remote control may malfunction;

[0009] b. Silver paste contacts are prone to wear: The sensitivity of the switches in the existing thin-film matrix circuit decreases with the increase of usage time and the number of key presses. In some cases, certain keys may even malfunction. After the thin-film matrix circuit is used for a period of time, due to micro-wear - oxidation - micro-wear... the sensitivity and effectiveness of the switch contacts of the flexible thin-film matrix circuit decrease. This is also the main reason why mid- to high-end desktop thin-film membrane keyboards have been replaced by long-life mechanical keyboards (which use relatively large-sized precious metal contacts).

[0010] The thin-film matrix circuit belongs to a metal contact type switch, with a short service life, and the sensitivity of the switch contacts decreases with the increase of usage time and the number of key presses.

[0011] c. The silver paste circuit printed on the thin film has a relatively large resistance value problem.

[0012] 2. The thin-film matrix circuit occupies a relatively large number of I / O ports: The existing 101-key keyboard has six rows of keys, with a maximum of 20 keys in one column, and a total of 27 I / O ports of the CPU are required (20 circuit lines for columns and 6 circuit lines for rows).

[0013] To solve the key conflict problem (key conflict: when several keys are pressed simultaneously, the CPU cannot recognize the coordinates of the keys pressed simultaneously), the thin-film matrix circuit solves this problem by increasing the I / O ports of the CPU, the matrix circuit keyboard; to solve some key conflicts, by increasing 7 - 9 I / O ports, only 7 - 9 key positions are solved without key conflicts (such as the common combination key Ctrl+A, connecting the switches of the Ctrl key and the A key to two I / O ports of the CPU respectively).

[0014] The existing 101-key thin-film matrix circuit keyboard occupies 33 - 35 I / O ports of the CPU.

[0015] 4. The electrical jitter of the switch affects the scanning speed of the keyboard: When the switch is turned on and off, the keyboard delays for 10ms through software and then detects the circuit level. It takes a total of 20ms to detect the on and off of one switch, reducing the scanning speed of the keyboard.

[0016] 5.. The keys of the keyboard using a light guide plate emit light unevenly and the light loss in the light guide plate is relatively large.

[0017] In existing laptops, a light guide plate for illuminating the keycaps is provided below the membrane switch circuit. Near the middle of the light guide plate, about 12 high-power LEDs are also provided. The light emitted by the LEDs travels along the length direction of the keyboard and propagates left and right through the light guide plate. Light guide dots are provided on the surface of the light guide plate. The propagation path of the LED light is as follows: it enters the light guide plate and then enters the characters of the keycaps from the light guide dots, causing the keycaps of the keyboard to emit light. Taking a 101-key keyboard as an example, the farthest transmission distance of light in the light guide plate is about 150 mm. Due to the large transmission distance, the loss of light in the light guide plate is large.

[0018] For keyboards using a light guide plate, the key illumination is uneven: it is very difficult to make the brightness of the keycaps at the 10-1 proximal end from the light source part the same as that of the keycaps at the 10-1 distal end from the light source part.

[0019] 6. The membrane matrix circuit is installed on the metal support plate 2, and the 'light-emitting light guide plate' is installed below the metal support plate 2. The number of openings in the membrane matrix circuit is the same as that in the metal support plate 2 (there are about several hundred light-transmitting openings). The waterproof process of the membrane matrix circuit is complex and the reliability is poor.

[0020] Worldwide, huge waste is caused by problems with contact membrane array switch circuits. So far, no low-cost, ultra-thin, durable, non-contact membrane optical switch has been put into industrial production.

[0021] Existing desktop mechanical keyboards generally adopt (taking 104 key positions as an example): a PCB board is set at the bottom of the keyboard, and more than 104 independent mechanical switches are soldered on the PCB board. The mechanical switches use metal contact type elastic sheets to make contact and non-contact actions to achieve the on and off of the circuit. One mechanical switch has up to 9 parts. The material cost of desktop mechanical keyboards is high, the production efficiency is low, and the manufacturing cost is high.

[0022] For details, see CN201510458691.4. The desktop mechanical keyboard uses 104 switches in series with 104 diodes to achieve conflict-free full key positions (the membrane matrix circuit is a screen-printed silver paste circuit and cannot be soldered with diodes).

[0023] For details, see CN2015105486824. This keyboard (with a total of 104 key positions) uses 104 light-emitting tubes and 104 light-receiving tubes. This technical solution uses a light-blocking body 5 (the light-blocking body 5 is called a punching hammer in this patent). A through hole is provided on the light-blocking body. The light-blocking body 5 is located between the emitting tube 21 and the receiving tube 22. When the key is not pressed, the light-blocking body 5 blocks the light path between the light-emitting tube 21 and the receiving tube 22. When the key is pressed, the light signal emitted by the light-emitting tube 21 passes through the through hole on the light-blocking body 5 and the light path is conducted to the receiving tube 22. By setting the light-blocking body 5, this optical switch mechanical keyboard uses a matrix switch circuit.

[0024] Problems existing in this optical switch keyboard:

[0025] 1. The optical switch is provided with a light-blocking body having through holes. Although the circuit is simplified, the light-blocking body makes the optical switch too thick to be used in an ultra-thin thin-film optical switch circuit;

[0026] 2. The use of 104 light-emitting tubes and 104 light-receiving tubes greatly increases the component cost;

[0027] How to cancel the independent light-blocking body and how to achieve an ultra-thin array optical switch, reduce the light-receiving tubes, and simplify the connection electronic circuit have become technical problems in the industry. Summary of the Invention

[0028] The object of the present invention is to provide a light guide plate keyboard array optical switch with a simple manufacturing process and low production cost, and in particular to provide a light guide film optical switch array with a long service life and an ultra-thin thickness.

[0029] A light guide plate optical switch and a light guide plate array optical switch module of the present invention include a light emitter, a light receiver, a circuit chip, an optical switch, and a light guide plate. The optical signal emitted by the light emitter is optically conducted to the light receiver through the optical switch. When the optical switch is triggered, the propagation optical path between the light emitter and the light receiver is turned on and off; the light guide plate is divided into multiple light regions, and the optical signals in the multiple light regions are isolated from each other; in each light region, multiple light emitters are respectively optically conducted to a group of light receivers or respectively optically conducted to a light receiver; the light emitter is connected to the CPU output port, and the light receiver is connected to the CPU input port; during use, the CPU detects the signals of multiple CPU input ports; when the optical switch in a certain light region is pressed, the CPU determines that a certain optical switch in a certain light region is pressed by detecting the CPU input port.

[0030] Furthermore: The light guide plate is composed of a switch light guide plate 7; the connection between the light emitter and the CPU output port is as follows: One light emitter in one light region is connected to one light emitter in another light region to form a light emitter connection group, and the above connection process is repeated to form multiple light emitter connection groups, and the multiple light emitter connection groups are respectively connected to multiple CPU output ports correspondingly.

[0031] It includes an optical transmitter, an optical receiver, a circuit chip, an optical switch, and a switch light guide plate. The optical signal emitted by the optical transmitter is optically conducted to the optical receiver through the optical switch; when the optical switch is triggered, the optical path between the optical transmitter and the optical receiver is switched on and off; the switch light guide plate 7 is divided into at least two optical regions, which are the first optical region 7a and the second optical region 7b respectively. The optical signals in the first optical region 7a are isolated from the optical signals in the second optical region 7b; the optical emission windows of multiple optical transmitters in the first optical region 7a are optically conducted to multiple optical switches and the optical path of the first optical receiver, and the optical emission windows of multiple optical transmitters in the second optical region 7b are optically conducted to multiple optical switches and the optical path of the second optical receiver; one optical transmitter in the first optical region 7a is connected to one optical transmitter in the second optical region 7b to form a connected optical transmitter group. The first connected optical transmitter group, the second connected optical transmitter group, the third connected optical transmitter group,... the nth connected optical transmitter group are respectively connected to the first CPU output port, the second CPU output port, the third CPU output port,... the nth CPU output port correspondingly; the first optical receiver and the second optical receiver are respectively connected to the first CPU input port of the CPU and the second CPU input port of the CPU; in use, the CPU continuously detects the signals of the first CPU input port and the second CPU input port; when the optical switch in the first optical region 7a is pressed, the CPU detects the change of the optical signal in the first optical region 7a through the first CPU input port, and the CPU judges that a certain optical switch in the first optical region 7a is pressed according to the change of the optical signal; when the optical switch in the second optical region 7b is pressed, the CPU detects the change of the optical signal in the second optical region 7b through the second CPU input port, and the CPU judges that a certain optical switch in the second optical region 7b is pressed according to the change of the optical signal.

[0032] Furthermore: The light guide plate array optical switch module further includes a CPU. Among them, the CPU has a CPU output interface and a CPU input interface; the CPU output port and the CPU input port on the circuit chip are respectively connected to the CPU output interface and the CPU input interface on another circuit chip correspondingly, or the CPU output port and the CPU input port are respectively connected to the CPU output interface and the CPU input interface correspondingly. The CPU input port, the CPU output interface, and the CPU input interface are located on the same circuit chip.

[0033] Furthermore: The CPU continuously scans and detects each CPU input port in a loop or continuously detects each CPU input port simultaneously. When the CPU detects a signal change at a certain output port, the CPU judges that a certain optical switch is triggered according to the optical transmitter connection group connected to the CPU output port and the optical region where the optical transmitter in the optical transmitter connection group is located.

[0034] Furthermore, when the array optical switch module is working, the CPU connects to a CPU output port, and in each optical area of the optical transmitter connection group connected to this CPU output port, at most one optical transmitter emits an optical signal. When a group of optical receivers in each optical area receives the optical signal or one optical receiver receives the optical signal, there is a signal input to each CPU input port connected to this optical transmitter connection group. The CPU determines whether an optical switch in each optical partition is triggered, and then the CPU closes this CPU output port. Then the CPU connects to another CPU output port. In each optical area of the optical transmitter connection group connected to this CPU output port, at most one optical transmitter emits an optical signal. When a group of optical receivers in each optical area receives the optical signal or one optical receiver receives the optical signal, there is a signal input to each CPU input port connected to this optical transmitter connection group. The CPU determines whether an optical switch in each optical partition is triggered, and then the CPU closes this CPU output port;... The above process is continuously looped;

[0035] When a certain optical switch is triggered, the optical path in this optical area is blocked, so that the optical receiver in this optical area cannot receive the optical signal, there is no signal input to the CPU input port connected to this optical receiver, and the CPU determines the position of this optical switch according to the connected optical transmitter connection group and the corresponding relationship between the optical area and the optical receiver.

[0036] Furthermore, each CPU output port of the CPU emits different characteristic signals, and the optical transmitters connected by the optical transmitter connection group all emit different characteristic signals in the same optical area.

[0037] It includes an optical transmitter, an optical receiver, a circuit chip, an optical switch, and a light guide plate. The optical signal emitted by the optical transmitter is optically conducted with the optical receiver through the optical switch; when the optical switch is triggered, the optical path between the optical transmitter and the optical receiver is switched on and off; the light guide plate is divided into multiple optical areas, and the optical signals propagating in each optical area are isolated from each other; in each optical area, the optical paths of multiple optical transmitters are optically conducted with a group of optical receivers or one optical receiver, and the optical receivers in each optical area are respectively connected to the signal input interfaces of the CPU;

[0038] Connect one optical transmitter in one optical area to one optical transmitter in another optical area to form an optical transmitter connection group in which at most one optical transmitter in each optical area is interconnected. Repeat the above connection process to form multiple optical transmitter connection groups; the CPU has CPU characteristic output interfaces that output multiple different characteristic signals. Each CPU characteristic output interface is connected to multiple groups of optical transmitter connection groups. A group of optical transmitter connection groups connected together form an optical transmitter characteristic group. The optical transmitters of each group of optical transmitter connection groups that make up the optical transmitter characteristic group all emit different characteristic signals; multiple optical transmitter characteristic groups are respectively connected to multiple CPU input interfaces of the CPU. The on / off of each optical transmitter characteristic group is controlled by a CPU input interface of the CPU; during use, the CPU continuously detects the signals of each signal input interface.

[0039] It includes an optical transmitter, an optical receiver, a circuit chip, an optical switch, and a light guide plate. The optical signal emitted by the optical transmitter is optically connected to the optical receiver through the optical switch; when the optical switch is triggered, the optical path between the optical transmitter and the optical receiver is switched on and off; the light guide plate is divided into n light zones, which are the first light zone 7a, the second light zone 7b, the third light zone 7c... the nth light zone respectively, and the optical signals in each light zone are isolated from each other; multiple optical transmitters in the first light zone 7a are optically connected to the first optical receiver G1, multiple optical transmitters in the second light zone 7b are optically connected to the second optical receiver G2, multiple optical transmitters in the third light zone 7c are optically connected to the third optical receiver G3...; one optical transmitter in the first light zone 7a, one optical transmitter in the second light zone 7b, one optical transmitter in the third light zone 7c... are electrically connected to form an optical transmitter connection group, and this connection is repeated to form the first optical transmitter connection group, the second optical transmitter connection group, the third optical transmitter connection group...; the CPU has CPU characteristic output interfaces for outputting multiple different characteristic signals, each CPU characteristic output interface is connected to multiple groups of optical transmitter connection groups, and multiple groups of optical transmitter connection groups are connected to form an LED characteristic connection group. The optical transmitters in the same light zone of the LED characteristic connection group all emit different characteristic signals; multiple LED characteristic connection groups are respectively connected to multiple CPU output interfaces of the CPU, and the on / off of each LED characteristic connection group is controlled by one CPU output interface of the CPU. The CPU output interfaces are composed of output interface B1, output interface B2, output interface B3... The first LED characteristic connection group is connected to the output interface B1 of the CPU, and the on / off of the first LED characteristic connection group is controlled by the output interface B1. The second LED characteristic connection group is connected to the output interface B2 of the CPU, and the on / off of the second LED characteristic connection group is controlled by the output interface B2. The third LED characteristic connection group is connected to the output interface B3 of the CPU, and the on / off of the third LED characteristic connection group is controlled by the output interface B3...; the first optical receiver G1 in the first light zone 7a, the second optical receiver G2 in the second light zone 7b, the third optical receiver G3 in the third light zone 7c... are respectively connected to the first signal input port C1 of the CPU, the second signal input port C2 of the CPU, the third signal input port C3, the third signal input port C3 of the CPU... in corresponding connection;

[0040] During use, the CPU continuously detects the signals of the first signal input port C1, the second signal input port C2, the third signal input port C3...

[0041] Furthermore, the CPU has two CPU feature output interfaces for emitting different feature signals: CPU feature output interface A1 and CPU feature output interface A2. CPU feature output interface A1 is connected to multiple groups of optical transmitter connection groups, and CPU feature output interface A2 is connected to multiple groups of optical transmitter connection groups. Two groups of optical transmitter connection groups respectively connected to CPU feature output interface A1 and CPU feature output interface A2 are connected to form a first optical transmitter feature group, and the first optical transmitter feature group is then connected to output interface B1. Two groups of optical transmitter connection groups respectively connected to CPU feature output interface A1 and CPU feature output interface A2 are connected to form a second optical transmitter feature group, and the second optical transmitter feature group is then connected to output interface B2.

[0042] Two groups of optical transmitter connection groups respectively connected to CPU feature output interface A1 and CPU feature output interface A2 are connected to form a third optical transmitter feature group, and the third optical transmitter feature group is then connected to output interface B3,.......

[0043] Two groups of optical transmitter connection groups respectively connected to CPU feature output interface A1 and CPU feature output interface A2 are connected to form an nth optical transmitter feature group, and the nth optical transmitter feature group is then connected to CPU output interface Bn;

[0044] The on / off states of the first optical transmitter feature group, the second optical transmitter feature group, the third optical transmitter feature group,....... the nth optical transmitter feature group are respectively controlled by output interface B1, output interface B2, output interface B3,....... output interface Bn.

[0045] Furthermore, the light guide plate array optical switch module further includes a circuit chip. The circuit chip is provided with a CPU output port, a CPU input port, and a CPU feature output port. The CPU output port, the CPU input port, and the CPU feature output port are respectively and correspondingly connected to the CPU output interface of the CPU, the CPU output interface of the CPU, and the CPU feature output interface of the CPU. The CPU output port, the CPU input port, and the CPU feature output port on the circuit chip are respectively and correspondingly connected to the CPU output interface, the CPU input interface, and the CPU feature output interface on another circuit chip, or the CPU output port, the CPU input port, and the CPU feature output port are respectively and correspondingly connected to the CPU output interface, the CPU input interface, and the CPU feature output interface. The CPU output port, the CPU input port, and the CPU feature output port are located on the same circuit chip.

[0046] Furthermore: The CPU has 2 CPU feature output interfaces that emit different characteristic signals: CPU feature output interface A1 and CPU feature output interface A2. When A1 emits 01 and A2 emits 10, it should be ensured that when A1 emits 0 and A2 emits 1, the two signals are synchronized in time; when A1 emits 1 and A2 emits 0, the two signals are synchronized in time, so as to ensure that only one group of optical transmitter connection groups emits light at each moment. Or the CPU has 3 CPU feature output interfaces that emit different characteristic signals: CPU feature output interface A1, CPU feature output interface A2, and CPU feature output interface A3. When A1 emits 001, A2 emits 100, and A3 emits 010, it should be ensured that when A1 emits 0, A2 emits 1, and A3 emits 0, the three signals are synchronized in time; when A1 emits 0, A2 emits 0, and A3 emits 1, the three signals are synchronized in time; when A1 emits 1, A2 emits 0, and A3 emits 0, the three signals are synchronized in time, so as to ensure that only one group of optical transmitter connection groups emits light at each moment. Or the CPU has 4 CPU feature output interfaces that emit different characteristic signals:.......

[0047] Furthermore: When the number of optical transmitters in each light area is equal, the number of optical transmitters in each group of optical transmitter connection groups is the same. Or when the number of optical transmitters in each light area is not equal, the number of optical transmitters in some optical transmitter connection groups is different.

[0048] It includes an optical transmitter, an optical connector, a circuit chip, a light guide plate, and an optical switch. The optical signal emitted by the optical transmitter is optically connected through the propagation optical path on the light guide plate and the optical switch to the optical connector. When the optical switch is triggered, the optical path between the optical transmitter and the optical connector is turned on and off. The light guide plate is composed of a switch light guide plate 7. The switch light guide plate 7 is provided with a light guide plate through hole penetrating its plate surface. The light guide plate through hole is composed of an LED switch hole 7-9, a guide plate blocking hole 7-2, a left front optical path hole 7-10, and a right front optical path hole 7-11. Among them, the optical transmitter is a side-emitting optical transmitter, and the optical transmitter is located in the LED switch hole 7-9. The left front optical path hole 7-10 and the right front optical path hole 7-11 penetrate the plate surface of the switch light guide plate 7, and a front optical path plate 7-12 is formed between the left front optical path hole 7-10 and the right front optical path hole 7-11. One end of the front optical path plate 7-12 is located on the side wall of the LED switch hole 7-9 and is optically connected to the optical transmitter. The other end of the front optical path plate 7-12 is located on the side wall of the guide plate blocking hole 7-2. The front optical path plate 7-12 is a part of the propagation optical path.

[0049] Furthermore, reflective films are attached to both the upper and lower surfaces of the switch light guide plate 7. One of the reflective film sheets is provided with a right front reflection hole 6-5 and a left front reflection hole 6-4 penetrating through its plate surface. The right front reflection hole 6-5 and the left front reflection hole 6-4 correspond to the positions of the right front light path hole 7-11 and the left front light path hole 7-10 respectively. On the edges of the right front reflection hole 6-5 and the left front reflection hole 6-4 of this reflective film sheet close to the front light path plate 7-12, there are respectively a right front extended edge film 6-8 and a left front extended edge film 6-7 extending outward. The right front extended edge film 6-8 and the left front extended edge film 6-7 form the extended reflection film of this reflective film. The extended reflection film of this reflective film is adhesively connected to another reflective film sheet. The left and right cross-sections of the front light path plate 7-12 are respectively covered by the left front extended edge film 6-7 and the right front extended edge film 6-8. The left and right cross-sections of the front light path plate 7-12 are formed by the formed right front reflection hole 6-5 and the left front reflection hole 6-4.

[0050] Furthermore, the switch light guide plate 7 is divided into multiple light zones, and the optical signals in the multiple light zones are isolated from each other. In each light zone, multiple optical transmitters are respectively optically connected to a group of optical connectors or respectively optically connected to an optical connector.

[0051] Furthermore, the optical switch module further includes a reflective film for reflecting optical signals. Reflective films for reflecting optical signals are provided on both the upper and lower surfaces of the switch light guide plate 7, and the reflective film is provided with an extended reflection film. The switch light guide plate 7 is provided with a guiding reflection hole 7-13 penetrating through its plate surface. The cross-section formed by punching and forming the guiding reflection hole 7-13 is the guide plate end cross-section 7-14. The extended reflection film covers the guide plate end cross-section 7-14 to form an optical reflection surface. The angle between the front guiding light path 7-15 and the guide plate end cross-section 7-14 is equal to the angle between the reflection light path 7-16 and the guide plate end cross-section 7-14, so that the optical signal emitted by the optical transmitter through the optical switch travels along the front guiding light path 7-15, passes through the guide plate end cross-section 7-14 and the extended reflection film, and the extended reflection film reflects the optical signal, and the reflected optical signal is conducted along the reflection light path 7-16 to the optical connector.

[0052] Furthermore, the light guide plate is composed of a light-emitting light guide plate 13 and a switch light guide plate 7. The light-emitting light guide plate 13 is located above the switch light guide plate 7. Among them, the upper surface of the light-emitting light guide plate 13 is provided with light-emitting guiding light spots 13-1, and the optical signal emitted by the optical transmitter is optically connected to the light-emitting guiding light spots 13-1. The light-emitting light guide plate 13 is provided with a light-emitting plate hole 13-3 penetrating through its plate surface. The blocking space (9-1) on the switch light guide plate 7 is aligned with the position of the light-emitting plate hole 13-3 on the light-emitting light guide plate 13. The LED light-emitting hole 13-2 provided on the light-emitting light guide plate 13 is aligned with the LED switch hole 7-9 provided on the switch light guide plate 7. Both the LED switch hole 7-9 and the LED light-emitting hole 13-2 can accommodate the optical transmitter.

[0053] Furthermore, the optical switch module further includes an optical leakage prevention part, which blocks the leakage of optical signals from the optical switch.

[0054] It includes an optical transmitter, an optical receiver, a circuit chip, a light guide plate, and an optical switch. Among them, the optical signal emitted by the optical transmitter is conducted through the propagation optical path on the light guide plate, the optical switch, and the optical path of the optical receiver. When the optical switch is triggered, the optical path between the optical transmitter and the optical receiver is turned on and off. The light guide plate is composed of a switch light guide plate 7, and the optical switch is composed of a switch blocking body 9-1 on a blocking switch sheet 9, an optical transmitter, an optical receiver, a switch light guide plate 7, and a guide plate blocking hole 7-2 on the switch light guide plate 7. Among them, the optical transmitter is composed of a light source part 10-1, and the light source part 10-1 is located inside the guide plate blocking hole 7-2.

[0055] The switch blocking body 9-1 is composed of a switch blocking plate 9-2, a blocking connecting plate 9-4, a lower through-hole 9-5, a blocking arch spring piece 9-6, and a blocking middle body 9-8. Among them, the lower end of the blocking arch spring piece 9-6 is connected to the plate surface of the blocking switch sheet 9, the upper end of the blocking arch spring piece 9-6 is connected upward to the blocking middle body 9-8, and the lower through-hole 9-5 penetrates through the blocking arch spring piece 9-6 to form the space of the lower through-hole 9-5, or the lower through-hole 9-5 penetrates through the blocking arch spring piece 9-6 and the plate surface of the blocking switch sheet 9 to form the space of the lower through-hole 9-5. The switch blocking plate 9-2 is connected to the blocking middle body 9-8 through the blocking connecting plate 9-4, and the blocking connecting plate 9-4 is aligned with the space position of the lower through-hole 9-5.

[0056] The light guide plate array optical switch module is provided with a blocking switch sheet 9, and the blocking switch sheet 9 is composed of a switch blocking body 9-1. The switch blocking body 9-1 is composed of a switch blocking plate 9-2, a blocking connecting plate 9-4, a lower through-hole 9-5, a blocking arch spring piece 9-6, and a blocking middle body 9-8. The lower end of the blocking arch spring piece 9-6 is connected to the plate surface of the blocking switch sheet 9, the upper end of the blocking arch spring piece 9-6 is connected upward to the blocking middle body 9-8, and the elastic blocking arch spring piece 9-6 supports the blocking middle body 9-8. The lower through-hole 9-5 penetrates through the blocking arch spring piece 9-6 to form the space of the lower through-hole 9-5, or the lower through-hole 9-5 penetrates through the blocking arch spring piece 9-6 and the plate surface of the blocking switch sheet 9 to form the space of the lower through-hole 9-5. Above the space of the lower through-hole 9-5, a switch blocking plate 9-2 is provided, and the switch blocking plate 9-2 is connected to the blocking middle body 9-8 through the blocking connecting plate 9-4. When the blocking middle body 9-8 is pressed, the blocking middle body 9-8 moves downward against the elastic force generated by the blocking arch spring piece 9-6, and the blocking connecting plate 9-4 enters the space of the lower through-hole 9-5.

[0057] Furthermore, the light source part 10-1 is composed of 3 groups of LEDs 10-2. The 3 groups of LEDs 10-2 are approximately 120 degrees apart from each other, and the 3 lower through-holes 9-5 are approximately 120 degrees apart from each other. The LEDs 10-2 are respectively located inside the lower through-holes 9-5.

[0058] Furthermore: The light source unit 10-1 is composed of two groups of LEDs 10-2. The two groups of LEDs 10-2 are approximately 180 degrees apart from each other. The two lower blocking through-holes 9-5 are approximately 180 degrees apart from each other. The LEDs 10-2 are respectively located within the lower blocking through-holes 9-5.

[0059] Furthermore: The light source unit 10-1 is composed of one group of LEDs 10-2. The LEDs 10-2 are respectively located within one lower blocking through-hole 9-5.

[0060] Furthermore: The space enclosed by the support blocking middle body 9-8, the blocking connecting plate 9-4, and the switch blocking plate 9-2 is the upper blocking space 9-3. The upper blocking space 9-3 of the switch blocking body 9-1 can accommodate the LEDs 10-2.

[0061] Furthermore: A metal support plate 2 is provided above the array optical switch module 3. The metal support plate 2 is provided with an outer support hole 2-1 and a middle support hole 2-2 penetrating through its plate surface. The switch blocking body 9-1 is provided with a blocking middle body 9-8 and a switch blocking plate 9-2. The blocking middle body 9-8 and the switch blocking plate 9-2 are respectively located within the middle support hole 2-2 and the outer support hole 2-1.

[0062] A method for COB packaging LEDs on a flexible FPC circuit sheet, including the FPC circuit sheet. The method is as follows: First: Form an LED through-hole 10-4 penetrating through the plate surface on the FPC circuit sheet 10, form an electronic circuit 10-8 on the FPC circuit sheet 10, weld a thin connecting conductor sheet 10-7 between the FPC suspension plate 10-3 and the FPC extension plate 10-5, and perform COB packaging of LED chips on the FPC suspension plate 10-3 to form LEDs 10-2; (The above process steps are not in a specific order)

[0063] Finally: The forming punch bends the connecting conductor sheet 10-7 by approximately 90 degrees, making the LEDs 10-2 into side-emitting LEDs.

[0064] The positive effects of the present invention are:

[0065] The present invention provides a thin film optical switch with a simple manufacturing process and low production cost. In particular, it provides a thin film optical switch with a long service life and ultra-thin thickness. The thin film optical switch can be widely applied to PC keyboards, thin film keyboards, and thin notebook keyboards; the thin film keyboards are widely used in medical devices, industrial control devices, and household appliances such as washing machines and microwave ovens. Description of the Drawings

[0066] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0067] Figure 1 It is a three-dimensional view of a 101-key laptop keyboard using the optical switch and optical module of the present invention;

[0068] Figure 2 It is Figure 1 A partial cross-sectional view of A of

[0069] Figure 3 It is Figure 2 An exploded three-dimensional view of

[0070] Figure 4 It is Figure 2 An exploded three-dimensional view of

[0071] Figure 5 It is a partial three-dimensional view of the blocking switch piece 9 of the present invention;

[0072] Figure 6 It is a three-dimensional view of the FPC circuit piece 10 of the present invention;

[0073] Figure 7 It is a partial three-dimensional view of the blocking switch piece 9 installed on the FPC circuit piece 10 of the present invention;

[0074] Figure 8 It is Figure 7 A three-dimensional view when the middle contact part 9-7 of is pressed;

[0075] Figure 9 It is Figure 2 The front view of

[0076] Figure 10 It is Figure 9 The B-B cross-sectional view of

[0077] Figure 11 It is Figure 10 A three-dimensional view when the keycap 1 of is pressed;

[0078] Figure 12 It is a three-dimensional view of the array optical switch module 3 of the present invention installed under the metal support plate 2;

[0079] Figure 13 It is Figure 12 A three-dimensional view when the middle contact part 9-7 of is pressed;

[0080] Figure 14Stereogram of the array optical switch module 3 of the present invention;

[0081] Figure 15 It is Figure 14 Stereogram when the resistance contact part 9-7 of is pressed;

[0082] Figure 16 Exploded view of the array optical switch module 3 with 101 optical switches of the present invention;

[0083] Figure 17 Front view of the switch light guide plate 7 with 101 optical switches of the present invention;

[0084] Figure 18 It is Figure 17 View of the upper surface of the switch light guide plate 7 with the upper reflection film 6 attached;

[0085] Figure 19 Partial enlarged view of the blocking switch piece 9 with 101 optical switches of the present invention;

[0086] Figure 20 Partial enlarged view of the FPC circuit piece 10 with 101 optical switches of the present invention;

[0087] Figure 21 Circuit diagram of 50 to 65 optical switches of the present invention;

[0088] Figure 22 Circuit diagram of 50 to 65 optical switches of the present invention with two characteristic signals;

[0089] Figure 23 Circuit diagram of 50 to 65 optical switches of the present invention with three characteristic signals;

[0090] Figure 24 Front view of the array optical switch module 3 with 101 optical switches of the present invention;

[0091] Figure 25 It is Figure 24 D-D cross-sectional view of ;

[0092] Figure 26 It is Figure 24 E-E cross-sectional view of ;

[0093] Figure 27 Front view of the exhaust row distribution on the blocking switch piece 9 with 101 optical switches of the present invention;

[0094] Figure 28 Front view of the exhaust row distribution on the switch light guide plate 7 with 101 optical switches of the present invention;

[0095] Figure 29It is the front view of the exhaust gas distribution on the array optical switch module 3 of 101 optical switches of the present invention;

[0096] Figure 30 It is Figure 29 The partial enlarged view of F;

[0097] Figure 31 It is Figure 30 The enlarged three-dimensional view;

[0098] Figure 32 It is the three-dimensional view of a notebook keyboard with 101 key positions adopting another optical switch and optical module of the present invention;

[0099] Figure 33 It is Figure 32 The partial cross-sectional view A;

[0100] Figure 34 It is Figure 33 The exploded three-dimensional view;

[0101] Figure 35 It is Figure 33 Another exploded three-dimensional view;

[0102] Figure 36 It is Figure 33 The three-dimensional view of the adopted array optical switch module 3;

[0103] Figure 37 It is Figure 36 The exploded three-dimensional view of the switch light guide plate 7 and the upper and lower reflection films;

[0104] Figure 38 It is Figure 37 The three-dimensional view of the upper and lower reflection films attached to the switch light guide plate 7;

[0105] Figure 39 It is Figure 33 The three-dimensional view of the blocking switch piece 9 adopted by the adopted array optical switch module 3;

[0106] Figure 40 It is Figure 38 The three-dimensional view of the positional relationship between the switch light guide plate 7 attached with the upper and lower reflection films and the blocking switch piece 9;

[0107] Figure 41 It is Figure 33 Another exploded three-dimensional view;

[0108] Figure 42 It is Figure 33 The front view;

[0109] Figure 43 It is Figure 42 The sectional view H-H;

[0110] Figure 44 Yes Figure 43 Perspective view of the keycap 1 being pressed

[0111] Figure 45 Yes Figure 32 Partial enlarged perspective view of the array optical switch module 3 employed

[0112] Figure 46 Yes Figure 32 Exploded perspective view of the array optical switch module 3 employed

[0113] Figure 47 Yes Figure 32 Front view of the switch light guide plate 7 of the array optical switch module 3 employed

[0114] Figure 48 Yes Figure 32 Front view of the switch light guide plate 7 with an upper reflective film attached of the array optical switch module 3 employed

[0115] Figure 49 Yes Figure 48 Partial enlarged view

[0116] Figure 50 Yes Figure 47 Partial enlarged view

[0117] Figure 51 Yes Figure 50 Schematic diagram of the switch light guide plate 7 with an upper reflective film attached Figure 52 Perspective view of the hole forming of the FPC circuit sheet of an optical switch of the present invention

[0118] Figure 53 Perspective view of the circuit forming of the FPC circuit sheet of an optical switch of the present invention

[0119] Figure 54 Perspective view of the COB packaged LED of the FPC circuit sheet of an optical switch of the present invention

[0120] Figure 55 Perspective view of the soldering of the connecting conductor sheet 10-7 of the FPC circuit sheet of an optical switch of the present invention

[0121] Figure 56 Perspective view of the bending forming of the connecting conductor sheet 10-7 of the FPC circuit sheet of an optical switch of the present invention Detailed implementation mode

[0122] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0123] Embodiment 1

[0124] Such as Figures 1 - 15 A light guide plate optical switch and a light guide plate array optical switch module, comprising a light emitter, a light receiver, a circuit chip, a light guide plate, and an optical switch. Among them, the optical signal emitted by the light emitter is conducted through the propagation optical path on the light guide plate, the optical switch, and the optical path of the light receiver. When the optical switch is triggered, the optical path between the light emitter and the light receiver is turned on and off; the light guide plate is composed of a switch light guide plate 7, and the optical switch is composed of a switch blocking body 9-1 on a blocking switch sheet 9, a light emitter, a light receiver, a switch light guide plate 7, and a guide plate blocking hole 7-2 on the switch light guide plate 7. Among them, the light emitter is composed of a light source part 10-1, and the light source part 10-1 is located in the guide plate blocking hole 7-2; the switch blocking body 9-1 is composed of a switch blocking plate 9-2, a blocking connecting plate 9-4, a lower through hole 9-5, a blocking arch spring piece 9-6, and a blocking middle body 9-8. Among them, the lower end of the blocking arch spring piece 9-6 is connected to the plate surface of the blocking switch sheet 9, the upper end of the blocking arch spring piece 9-6 is connected upward to the blocking middle body 9-8, and the lower through hole 9-5 penetrates the blocking arch spring piece 9-6 to form a space for the lower through hole 9-5, or the lower through hole 9-5 penetrates the blocking arch spring piece 9-6 and the plate surface of the blocking switch sheet 9 to form a space for the lower through hole 9-5; the switch blocking plate 9-2 is connected to the blocking middle body 9-8 through the blocking connecting plate 9-4, and the blocking connecting plate 9-4 is aligned with the space position of the lower through hole 9-5.

[0125] The light guide plate array optical switch module is provided with a blocking switch sheet 9, the blocking switch sheet 9 is composed of a switch blocking body 9-1, and the switch blocking body 9-1 is composed of a switch blocking plate 9-2, a blocking connecting plate 9-4, a lower through hole 9-5, a blocking arch spring piece 9-6, and a blocking middle body 9-8; the lower end of the blocking arch spring piece 9-6 is connected to the plate surface of the blocking switch sheet 9, the upper end of the blocking arch spring piece 9-6 is connected upward to the blocking middle body 9-8, and the elastic blocking arch spring piece 9-6 supports the blocking middle body 9-8; the lower through hole 9-5 penetrates the blocking arch spring piece 9-6 to form a space for the lower through hole 9-5, or the lower through hole 9-5 penetrates the blocking arch spring piece 9-6 and the plate surface of the blocking switch sheet 9 to form a space for the lower through hole 9-5; a switch blocking plate 9-2 is arranged above the space of the lower through hole 9-5, and the switch blocking plate 9-2 is connected to the blocking middle body 9-8 through the blocking connecting plate 9-4; when the blocking middle body 9-8 is pressed, the blocking middle body 9-8 moves downward against the elastic force generated by the blocking arch spring piece 9-6, and the blocking connecting plate 9-4 enters the space of the lower through hole 9-5.

[0126] The optical switch is composed of a switch blocking body 9-1 on the blocking switch piece 9, the optical emission window of the optical transmitter, the optical reception window of the optical receiver, the switch light guide plate 7, and the guide plate blocking hole 7-2 on the switch light guide plate 7. Among them, when the optical receiver is optically connected to the guide plate blocking hole 7-2 through the switch light guide plate 7, the optical reception window is located on the optical reception section 7-4 of the guide plate blocking hole 7-2 (adopted in this embodiment). When the optical transmitter is located inside the guide plate blocking hole 7-2, the optical emission window is located at the light emission end of the optical transmitter (adopted in this embodiment). Alternatively, when the optical transmitter is optically connected to the guide plate blocking hole 7-2 through the switch light guide plate 7, the optical emission window is located on the optical reception section 7-4.

[0127] Such as Figure 1 、This embodiment takes a notebook keyboard with 101 key positions (the array switch module has the largest usage amount) to illustrate in detail the light guide plate optical switch and the light guide plate array optical switch module of the present invention.

[0128] Such as Figures 1 - 3 、 Figure 2 is Figure 1 A partial cross-sectional view of part A. The key device of one key position shown in the figure is composed of a keycap 1, a metal support plate 2, an array optical switch module 3, a reset body 4, and a pair of plastic supports 5. Among them, the pair of plastic supports 5 are respectively connected to the keycap 1 and the metal support plate 2 to ensure the up-and-down parallel movement of the keycap 1. The elastic reset body 4 abuts against the keycap 1 and the metal support plate 2 respectively, and under the action of elastic force, the keycap 1 is pushed to the upper limit position (the highest position).

[0129] The key device of one key position of the existing notebook keyboard (not shown in the figure) is composed of a keycap 1, a metal support plate 2, a reset body 4, a pair of plastic supports 5, and an array switch module (composed of three layers of thin films, where the upper and lower layers of thin films are printed with silver paste circuits and the middle is an isolation layer). Among them, the array switch module is located above and connected to the metal support plate 2, and the light guide plate module that makes the characters on the keycap 1 emit light is located below and connected to the metal support plate 2. The reset body 4 abuts against the keycap 1 and the light guide plate module respectively.

[0130] Such as Figure 4, the array optical switch module 3 of the present invention is located below the metal support plate 2 of the notebook keyboard (the array optical switch module 3 can also make the characters on the keycap 1 emit light). The array optical switch module 3 is composed of an upper reflective film 6, a switch light guide plate 7, a lower reflective film 8, a blocking switch piece 9, an FPC circuit piece 10, etc. Among them, the switch light guide plate 7 is made of a highly transparent material (such as a PC film, a PMMA film, a glass film, etc.). The upper surface and the lower surface of the switch light guide plate 7 are respectively attached with an upper reflective film 6 and a lower reflective film 8 (in this embodiment, the reflective film is a dielectric reflective film, and a reflective aluminum film, etc. can also be used). The upper reflective film 6 and the lower reflective film 8 help to reduce the light loss of the light signal in the switch light guide plate 7 (it can also be adopted that the reflective film is cancelled, and a reflective film is electroplated or magnetron sputtered on the surface of the switch light guide plate 7 to reduce the light loss). The elastic blocking switch piece 9 (usually injection molded with a silicone rubber material) is located below the switch light guide plate 7; the blocking switch piece 9 is located between the switch light guide plate 7 and the FPC circuit piece 10 and below the switch light guide plate 7 (adopted in this embodiment). The FPC circuit piece 10 is a flexible circuit board with a thickness of 0.1 mm. The upper anti-middle hole 6-2 passing through the upper reflective film 6 is respectively aligned with the guide plate blocking hole 7-2 passing through the switch light guide plate 7 and the lower anti-middle hole 8-1 passing through the lower reflective film 8, and the diameters of the holes are the same; the guide plate blocking hole 7-2 is respectively aligned with the switch blocking body 9-1 provided on the blocking switch piece 9 and the light source part 10-1 provided on the FPC circuit piece 10. The opening space 7-3 of the guide plate blocking hole 7-2 can accommodate the switch blocking body 9-1. The hole cross-section formed by punching the guide plate blocking hole 7-2 is a light receiving cross-section 7-4 (the light receiving window of the optical connector). The light signal enters the light receiving cross-section 7-4 and is optically connected with the optical connector (a photosensitive tube is adopted in this embodiment) through the light propagation optical path 7-5. The light propagation optical path 7-5 passes through the gap between the light guide dots 7-1 and is optically connected with the optical connector (when the light signal is strong enough, it can also pass through with light loss generated below the light guide dots 7-1); a light guide dot part can also be provided on the upper surface of the switch light guide plate 7 (it can also not be provided). The light guide dot part is composed of light guide dots 7-1 formed by screen printing light guide ink at multiple circular points on the upper surface of the switch light guide plate 7. The light guide dot part is composed of light guide dots 7-1 formed by hot pressing multiple concave lenses on the upper surface of the switch light guide plate 7. The light guide dot part is optically connected with the characters on the keycap 1 through the reflective light-transmitting part 6-1 passing through the reflective film 6 (a through hole is adopted in this embodiment. The reflective film usually generates a layer of reflective material on a PET transparent thin sheet, and no reflective material is generated at the position corresponding to the light guide dot part - making it a light-transmitting transparent area) and makes the characters emit light.

[0131] Such as Figures 4 - 5, on the blocking switch piece 9 in the shape of a plate (made of elastic material), there is a switch blocking body 9-1. The switch blocking body 9-1 is composed of a switch blocking plate 9-2, a blocking upper space 9-3, blocking connecting plates 9-4, a blocking lower through hole 9-5, blocking arched elastic pieces 9-6, a blocking middle contact part 9-7, and a blocking middle body 9-8. Among them, the lower end of the blocking arched elastic piece 9-6 is connected to the plate surface of the blocking switch piece 9, and the upper end of the blocking arched elastic piece 9-6 is connected upward to the blocking middle body 9-8; in the figure, 3 blocking arched elastic pieces 9-6 are used to support the blocking middle body 9-8 (it is optimal that the blocking arched elastic pieces 9-6 are mutually at an angle of 120 degrees); 2 blocking arched elastic pieces 9-6 (not shown in the figure) can also be used to support the blocking middle body 9-8 (it is optimal that the blocking arched elastic pieces 9-6 are mutually at an angle of 180 degrees); 1 blocking arched elastic piece 9-6 (not shown in the figure) can also be used to support the blocking middle body 9-8 (the blocking arched elastic piece 9-6 is an integral body, and it is optimal to surround about 240 degrees, and there is a notch with an angle of about 60 degrees at the 240-degree position); at the notch between the blocking arched elastic pieces 9-6 or at the notch of the blocking arched elastic piece 9-6, there is a blocking lower through hole 9-5 formed by penetrating the plate surface of the blocking switch piece 9. Above the blocking lower through hole 9-5, there are two blocking connecting plates 9-4 with one end connected to support the blocking middle body 9-8 and the other end connected to the switch blocking plate 9-2. The switch blocking plate 9-2 extends upward from the upper surface of the two blocking connecting plates 9-4. The space surrounded by the supporting blocking middle body 9-8, the two blocking connecting plates 9-4, and the switch blocking plate 9-2 is the blocking upper space 9-3.

[0132] It should be ensured that: the blocking lower through hole 9-5 can accommodate the two blocking connecting plates 9-4;

[0133] It should be ensured that: the connection part of the blocking arched elastic piece 9-6 upward to the blocking middle body 9-8 is on the same plane as the upper surface of the two blocking connecting plates 9-4 or the connection part of the blocking arched elastic piece 9-6 upward to the blocking middle body 9-8 is higher than the upper surface of the two blocking connecting plates 9-4;

[0134] It should be ensured that: the switch blocking plate 9-2 and the blocking middle body 9-8 are concentric;

[0135] When an external force acts downward on the blocking middle contact part 9-7, the blocking middle body 9-8 moves downward against the elastic force generated by the blocking arched elastic piece 9-6 until the two blocking connecting plates 9-4 completely enter the blocking lower through hole 9-5 and the lower end surface of the blocking middle body 9-8 and the lower end surfaces of the two blocking connecting plates 9-4 coincide with the lower plate surface of the blocking switch piece 9; when the external force is removed, the blocking middle body 9-8 and the switch blocking plate 9-2 reset under the action of the elastic force of the blocking arched elastic piece 9-6.

[0136] Such as Figure 4 , Figure 6 , on the sheet-shaped flexible FPC circuit piece 10, there is a light source part 10-1. The light emitter is composed of the light source part 10-1;

[0137] The light source unit 10-1 is composed of three side-emitting LEDs 10-2 (it is optimal that the LEDs 10-2 are 120 degrees apart from each other).

[0138] The light source unit 10-1 is composed of two side-emitting LEDs 10-2 (it is optimal that the LEDs 10-2 are 180 degrees apart from each other).

[0139] The light source unit 10-1 is composed of one side-emitting LED 10-2.

[0140] The light-emitting end of the LED 10-2 is the light-emitting window of the LED 10-2. An LED through-hole 10-4 penetrating the board surface of the FPC circuit board 10 is provided in the opposite direction of the light-emitting window of the LED 10-2. In this embodiment, an FPC extension board 10-5 formed on the inward-extending board surface of the FPC circuit board 10 is adopted. An LED chip is encapsulated on the FPC suspension end board 10-3 formed at the cantilever end of the FPC extension board 10-5 - the LED 10-2 is formed by COB encapsulation. Finally, the FPC suspension end board 10-3 is bent 90 degrees so that the LED 10-2 encapsulated on the FPC suspension end board 10-3 becomes a side-emitting light source; the side-emitting LED 10-2 in this embodiment is composed of an LED chip encapsulated by COB on the FPC suspension end board 10-3 bent 90 degrees.

[0141] Such as Figures 7 - 8 Bond the lower surface of the blocking switch piece 9 to the upper surface of the FPC circuit board 10.

[0142] Viewed from the top view (looking from top to bottom):

[0143] It should be ensured that: the LED 10-2 and the suspension end board 10-3 on the FPC circuit board 10 are located within the blocking space 9-3 of the blocking switch piece 9; it should be ensured that: the blocking body 9-8 on the blocking switch piece 9 is located within the LED through-hole 10-4 on the FPC circuit board 10.

[0144] Such as Figure 7 、 L The optical signal emitted by the ED 10-2 is emitted from the space between the lower surface of the switch blocking plate 9-2 and the upper surface of the blocking switch piece 9.

[0145] Such as Figure 8 、When the blocking middle contact part 9-7 is touched and pressed, the blocking arch spring piece 9-6 generates elastic deformation, and the blocking middle body 9-8 and the switch blocking plate 9-2 move downward, and the switch blocking plate 9-2 blocks the optical signal emitted by the LED 10-2.

[0146] Figure 9 Is Figure 1 The front view of the A partial cross-sectional view.

[0147] Such asFigure 10 , Figure 12 When the keycap 1 is at the upper limit position, the upper parts of the blocking contact part 9-7 of the blocking switch piece 9 and the blocking body 9-8 are located in the support plate middle hole 2-2 penetrating near the middle plate surface of the through-metal support plate 2, and the switch blocking plate 9-2 of the blocking switch piece 9 is located in the support plate outer hole 2-1 penetrating the plate surface of the through-metal support plate 2. The support plate outer hole 2-1 is located outside the support plate middle hole 2-2; the optical signal emitted by the side-emitting LED 10-2 enters the switch light guide plate 7 through the light receiving section 7-4 (light receiving window) on the switch light guide plate 7.

[0148] Such as Figure 10 , Figure 11 To avoid the influence of the environment on the switch light guide plate 7, a sealing film piece 11 of a thin film piece can be pasted on the lower surface of the FPC circuit piece 10 (it is best to use a 0.05 mm metal film - which is beneficial to the heat dissipation of the keyboard and plays a sealing role at the same time). At the same time, the bottom surface of the reset body 4 (usually injection molded with silicone rubber material) is hermetically connected to the upper surface of the through-metal support plate 2, and the upper surface of the array optical switch module 3 is hermetically connected to the lower surface of the through-metal support plate 2, so as to seal the space under the reset body 4, the space of the LED through hole 10-4, the light guiding space 7-3, etc., to avoid the pollution of the light receiving section 7-4 of the switch light guide plate 7 by the environment and generate light loss. To avoid the influence on pressing the reset body 4 (such as difficult pressing of the reset body 4), an exhaust groove (not shown in the figure) is provided on the plate surface of the blocking switch piece 9.

[0149] The greatest advantage of the switch blocking body 9-1 of the present invention is that: the thickness of the array optical switch module 3 is minimized (such as Figure 10 the thickness is only 0.52 mm); the greatest advantage after the light guiding space 7-3, etc. of the present invention is sealed is that: it eliminates the decrease in the light incident efficiency of the light receiving section 7-4 (light receiving window) of the switch light guide plate 7 caused by dust (especially when the optical switch is used for a long time).

[0150] Such as Figures 10 - 13 When the keycap 1 is pressed, the inner upper surface of the reset body 4 contacts the blocking contact part 9-7 and pushes the blocking contact part 9-7 together with the switch blocking plate 9-2 to move downward, the blocking spring piece 9-6 generates elastic deformation, and the switch blocking plate 9-2 enters the lower blocking through hole 9-5 downward from the support plate outer hole 2-1, and the switch blocking plate 9-2 blocks the optical signal emitted by the LED 10-2 from entering the switch light guide plate 7.

[0151] Such as Figures 14 - 15When the blocking switch piece 9 of the array optical switch module 3 is at the upper extreme position and the lower extreme position, the positional relationship between the switch blocking plate 9-2 and the LED 10-2; the upper reflection middle hole 6-2, the guide plate blocking hole 7-2, and the lower reflection middle hole 8-1 are aligned in position and have the same hole diameter; the light emitted from the light guide dot 7-1 exits from the transparent area of the upper reflection film 6 - the reflection and light transmission part 6-1.

[0152] As Figures 16 - 17 In this embodiment, a notebook keyboard with 101 key positions (the array switch module has the largest usage amount) is used to illustrate in detail the light guide plate optical switch and the light guide plate array optical switch module of the present invention; the light guide plate array optical switch module has 101 optical switches arranged horizontally and vertically. Among them, the first row has 20 optical switches, the second row has 18 optical switches, the third row has 18 optical switches, the fourth row has 16 optical switches, the fifth row has 16 optical switches, and the sixth row has 13 optical switches.

[0153] The array optical switch module 3 is composed of an upper reflection film 6, a switch light guide plate 7, a lower reflection film 8, a blocking switch piece 9, an FPC circuit piece 10, etc.; among them, the switch light guide plate 7 is made of a highly transparent material; the switch light guide plate 7 is divided into 6 light areas by a guide plate horizontal hole 7-7 and a guide plate vertical hole 7-8 passing through the plate surface of the switch light guide plate 7. The 6 light areas are: the first light area 7a, the second light area 7b, the third light area 7c, the fourth light area 7d, the fifth light area 7e, and the sixth light area 7f. In this embodiment, two guide plate horizontal holes 7-7 and three vertical guide plate vertical holes 7-8 are used to separate the six light areas from each other. The two guide plate horizontal holes 7-7 and the three vertical guide plate vertical holes 7-8 form a guide plate exhaust groove. The exhaust groove provided on the array optical switch module 3 is composed of a guide plate exhaust groove and a barrier exhaust groove.

[0154] The first light area 7a has the light emission windows of 19 light source parts 10-1 optically connected to 19 optical switches and a guide plate optical connection part 7-6 (the light emission windows in this embodiment are located at the light emission ends of the light source parts 10-1), and the guide plate optical connection part 7-6 is optically connected to the photosensitive tube; the guide plate optical connection part 7-6 can be composed of dots formed by screen-printing light guide ink at multiple circular points on the upper surface of the switch light guide plate 7, and the guide plate optical connection part 7-6 can also be composed of dots formed by hot-pressing multiple concave lenses on the upper surface of the switch light guide plate 7. The guide plate optical connection part 7-6 can also be composed of through holes passing through the plate surface.

[0155] The second light zone 10-6 conducts the optical paths of the light emission windows of 18 light source units 10-1, 18 optical switches, the guide plate optical connection part 7-6, and a photosensitive tube. The third light zone 7c conducts the optical paths of the light emission windows of 15 light source units 10-1, 15 optical switches, the guide plate optical connection part 7-6, and a photosensitive tube. The fourth light zone 7d conducts the optical paths of the light emission windows of 14 light source units 10-1, 14 optical switches, the guide plate optical connection part 7-6, and a photosensitive tube. The fifth light zone 7e conducts the optical paths of the light emission windows of 16 light source units 10-1, 16 optical switches, the guide plate optical connection part 7-6, and a photosensitive tube. The sixth light zone 7f conducts the optical paths of the light emission windows of 19 light source units 10-1, 19 optical switches, the guide plate optical connection part 7-6, and a photosensitive tube;

[0156] One light source unit 10-1 in the third light zone 7c (the minimum number of light source units 10-1 is 13) is electrically connected (in series, in parallel, or a combination thereof) to one light source unit 10-1 in each of the other light zones to form a light emitter connection group. The above process is repeated to form 13 light emitter connection groups with six light source units 10-1 electrically connected;

[0157] The remaining two unelectrically connected light source units 10-1 in the fourth light zone 7d (the number of light source units 10-1 is 16) are electrically connected to one light source unit 10-1 in each of the other light zones to form 2 light emitter connection groups with five light source units 10-1 electrically connected. The remaining one light source unit 10-1 in the second light zone 7b and the fifth light zone 7e (the number of light source units 10-1 in both is 17) is electrically connected to one light source unit 10-1 in each of the other light zones to form 1 light emitter connection group with four light source units 10-1 electrically connected. The remaining one light source unit 10-1 in the first light zone 7a and the sixth light zone 7f (the number of light source units 10-1 in both is 19) is electrically connected to one light source unit 10-1 in each of the other light zones to form 2 light emitter connection groups with three light source units 10-1 electrically connected.

[0158] Such as Figures 16 - 20 The light guide plate is divided into multiple light zones, and the optical signals in the multiple light zones are isolated from each other. In each light zone, multiple light emitters are respectively optically connected to a group of optical connectors or respectively optically connected to an optical connector. The light emitters are connected to the CPU output port, and the optical connectors are connected to the CPU input port. The light signals emitted by the light emitters in each light zone can all be recognized by the CPU;

[0159] During use, when an optical switch in a certain light zone is pressed, the CPU judges that a certain optical switch in a certain light zone is pressed by detecting the CPU input port.

[0160] The light guide plate is composed of a switchable light guide plate (7); the connection between the optical transmitter and the CPU output port is as follows: one optical transmitter in one light zone is connected to one optical transmitter in another light zone to form a group of connected optical transmitters. Repeat the above connection process to form multiple groups of connected optical transmitters, and the multiple groups of connected optical transmitters are connected to multiple CPU output ports, so as to ensure that: at any time or when the CPU detects the CPU input port, at most one optical transmitter in each light zone emits an optical signal.

[0161] The switchable light guide plate 7 is divided into at least two light zones, namely the first light zone 7a and the second light zone 7b. The optical signals in the first light zone 7a and the second light zone 7b are isolated; the optical emission windows of multiple optical transmitters in the first light zone 7a are optically connected to multiple optical switches and the first optical connector, and the optical emission windows of multiple optical transmitters in the second light zone 7b are optically connected to multiple optical switches and the second optical connector; one optical transmitter in the first light zone 7a is connected to one optical transmitter in the second light zone 7b to form a group of connected optical transmitters. The first group of connected optical transmitters, the second group of connected optical transmitters, the third group of connected optical transmitters,... the nth group of connected optical transmitters are respectively connected to the first CPU output port, the second CPU output port, the third CPU output port,... the nth CPU output port; the first optical connector and the second optical connector are respectively connected to the first CPU input port of the CPU and the second CPU input port of the CPU; in use, the CPU continuously detects the signals of the first CPU input port and the second CPU input port; when the optical switch in the first light zone 7a is pressed, the CPU detects a change in the optical signal in the first light zone 7a through the first CPU input port, and the CPU judges that a certain optical switch in the first light zone 7a is pressed according to the change in the optical signal; when the optical switch in the second light zone 7b is pressed, the CPU detects a change in the optical signal in the second light zone 7b through the second CPU input port, and the CPU judges that a certain optical switch in the second light zone 7b is pressed according to the change in the optical signal.

[0162] The light guide plate array optical switch module further includes a CPU. Among them, the CPU has multiple CPU output interfaces and CPU input interfaces. The group of connected optical transmitters is connected to the CPU output interface through the CPU output port, and the optical connector is connected to the CPU input interface through the CPU input port; the CPU output port, the CPU input port, the CPU output interface, and the CPU input interface are on the same circuit chip or the CPU output port, the CPU input port, the CPU output interface, and the CPU input interface are on different circuit chips respectively.

[0163] The CPU continuously scans each CPU input port in a loop or continuously detects each CPU input port simultaneously. When the CPU detects a signal change at a certain output port, the CPU determines which optical switch is triggered based on the optical transmitter connection group connected to the CPU output port and the optical zone where the optical transmitter in this optical transmitter connection group is located.

[0164] When the array optical switch module is working, the CPU connects to a CPU output port. In each optical zone, at most one optical transmitter in the optical transmitter connection group connected to this CPU output port emits an optical signal. When a group of optical receivers in each optical zone receives the optical signal or one optical receiver receives the optical signal, there is a signal input at each CPU input port connected to this optical transmitter connection group. The CPU determines whether an optical switch is triggered in each optical partition, and then the CPU closes this CPU output port;

[0165] The CPU then connects to another CPU output port. In each optical zone, at most one optical transmitter in the optical transmitter connection group connected to this CPU output port emits an optical signal. When a group of optical receivers in each optical zone receives the optical signal or one optical receiver receives the optical signal, there is a signal input at each CPU input port connected to this optical transmitter connection group. The CPU determines whether an optical switch is triggered in each optical partition, and then the CPU closes this CPU output port; ......

[0166] The above process is continuously looped;

[0167] When an optical switch is triggered, the optical path in this optical zone is blocked, so that the optical receiver in this optical zone cannot receive the optical signal, and there is no signal input at the CPU input port connected to this optical receiver. The CPU determines the position of this optical switch based on the connected optical transmitter connection group and the corresponding relationship between the optical zone and the optical receiver.

[0168] Each CPU output port of the CPU emits different characteristic signals, and the optical transmitters connected by the optical transmitter connection group all emit different characteristic signals in the same optical zone.

[0169] Such as Figures 19 - 20 The switch blocking bodies 9-1 on the blocking switch piece 9 are arranged vertically and horizontally; the light source parts 10-1 on the FPC circuit piece 10 are arranged vertically and horizontally; the blocking medium 9-8 provided on the switch blocking body 9-1 is located in the LED through hole 10-4 of the light source part 10-1.

[0170] See Figure 21, because the A4 paper is too small, only 59 switches are drawn in the circuit diagram. The CPU requires a total of 10 I / O ports (the CPU requires 10 input interfaces B, 6 input interfaces C, and the switch light guide plate 7 is divided into 6 light areas, and each light area requires 1 photosensitive tube G); in this embodiment, taking the circuit of the light guide plate array optical switch module with 101 optical switches as an example, the CPU used by 101 optical switches requires a total of 20 output interfaces, and the output interfaces are B1, B2....B20 respectively (where B11, B12....B20 and the circuits electrically connected to them are not shown in the figure). The input interfaces of the six photosensitive tubes G are respectively connected to C1, C2....C6; a light emitter in one light area is connected to a light emitter in another light area to form an LED connection group in which the maximum number of light emitters in each light area are interconnected.

[0171] Among the 6 light areas:

[0172] For the LED connection group with LED serial number 1 in each light area, it is the 1LED connection group (the light emitter connection group is composed of the LED connection group). The 1LED connection group is electrically connected by LED11, LED21, LED31, LED41, LED51, and LED61 (where n in LEDnm represents that the LED is in the nth light area, and m represents the serial number of the light area where the LED is located) (in the figure, the electrical connection is in parallel connection, and in actual application, series connection or parallel connection and their combinations are all acceptable). The 1LED connection group is connected to B1 of the CPU;

[0173] The 2LED connection group is electrically connected by LED12, LED22, LED32, LED42, LED52, and LED62, and the 2LED connection group is connected to B2 of the CPU; .......

[0174] The 20LED connection group is electrically connected by LED110, LED210, LED310, LED410, LED510, and LED610, and the 20LED connection group is connected to B20 of the CPU;

[0175] In the figure, G1, G2, G3... are photosensitive tubes, and G1, G2, G3... are respectively connected to the first input interface C1, the second input interface C2, the third input interface C3... correspondingly.

[0176] There are 101 LEDs for 101 optical switches. If the light areas are not divided and the LED connection group circuit structure is not adopted, the CPU requires a total of 101 output interfaces; the present invention adopts light area division and the LED connection group circuit structure. The CPU used by 101 LEDs requires a total of 20 output interfaces, which greatly reduces the number of output interfaces and simplifies the electronic circuit. At the same time, the CPU requires a total of 20 output interfaces, making the CPU scanning detection speed more than 5 times higher.

[0177] Due to the different numbers of optical switches provided on the light guide plate array optical switch module, the numbers of light areas provided on the switch light guide plate 7 are also different. It is possible that there is only one light source unit 10-1 in a set of optical transmitter connection groups;

[0178] Connect the first receiver G1 of the first light area 7a, the second receiver G2 of the second light area 7b... the sixth receiver G6 of the sixth light area 7f to the first input interface C1, the second input interface C2... the sixth input interface C6 respectively.

[0179] During use, the CPU turns on 1LED. At this time, at most only one light source unit 10-1 in each light area emits an optical signal. At the same time, the CPU continuously detects the signals of the first input interface C1, the second input interface C2... the sixth input interface C6 to determine whether the optical signal has changed - to determine which keycap has been pressed;

[0180] The CPU turns on 2LED. At this time, at most only one light source unit 10-1 in each light area emits an optical signal. At the same time, the CPU continuously detects the signals of the first input interface C1, the second input interface C2... the sixth input interface C6 to determine whether the optical signal has changed - to determine which keycap has been pressed; ......

[0181] The CPU continuously repeats the above detection.

[0182] The first output interface of the CPU emits an optical signal. When the optical switch of the first light area 7a is pressed, the first input interface C1 detects the change of the optical signal in the first light area 7a, and the CPU determines that a certain optical switch in the first light area 7a has been pressed according to the change of the optical signal;

[0183] The second output interface of the CPU emits an optical signal. When the optical switch of the second light area 7b is pressed, the second input interface C2 detects the change of the optical signal in the second light area 7b, and the CPU determines that a certain optical switch in the second light area 7b has been pressed according to the change of the optical signal;......

[0184] The CPU continuously performs cyclic scanning detection.

[0185] See Figure 22 To reduce the I / O ports of the CPU and simplify the circuit, on the basis of the circuit diagram of Figure 24 the CPU adds CPU characteristic output interfaces - CPU characteristic output interface A1 and CPU characteristic output interface A2.

[0186] A total of 10 output interfaces are required for the CPU used by 101 optical switches. The output interfaces are B1, B2, B3, B4.......B10 (where B6, B7.......B10 and the circuits electrically connected thereto are not shown in the figure. The input interfaces are C1, C2.......C6, and the CPU feature output interfaces are A1 and A2. The CPU requires a total of 17 I / O ports;

[0187] 1 LED connection group is electrically connected by LED11, LED21, LED31, LED41, LED51, and LED61;

[0188] 2 LED connection groups are electrically connected by LED12, LED22, LED32, LED42, LED52, and LED62;

[0189] After the above 2 LED connection groups are connected together, an LED feature group is formed, and the LED feature group is connected to B1;

[0190] 3 LED connection groups are electrically connected by LED13, LED23, LED33, LED43, LED53, and LED63;

[0191] 4 LED connection groups are electrically connected by LED14, LED24, LED34, LED44, LED54, and LED64;

[0192] After the above 2 LED connection groups are connected together, an LED feature group is formed, and the LED feature group is connected to B2; .......

[0193] After the above 2 LED connection groups are connected together, an LED feature group is formed, and the LED feature group is connected to B5;

[0194] The CPU has 2 CPU feature output interfaces that emit different feature signals: CPU feature output interface A1 and CPU feature output interface A2,

[0195] CPU feature output interface A1 is connected to multiple groups of LED connection groups, and CPU feature output interface A2 is connected to multiple groups of LED connection groups;

[0196] One group of LED feature groups is formed by connecting 2 groups of LED connection groups. Among them, each LED connection group that constitutes the LED feature group emits different feature signals,

[0197] The first LED feature group is connected to the output interface B1, and the output interface B1 controls the on / off of the first LED feature group. The first LED feature group is formed by connecting two LED connection groups, and the LED connection groups all emit different feature signals,

[0198] The second LED feature group is connected to output interface B2, and the on / off of the second LED feature group is controlled by output interface B2. The second LED feature group is formed by connecting two LED groups, and each LED group emits different characteristic signals.

[0199] The third LED feature group is connected to output interface B3, and the on / off of the third LED feature group is controlled by output interface B3. The third LED feature group is formed by connecting two LED groups, and each LED group emits different characteristic signals. .......。

[0200] See Figure 23 To further reduce the I / O ports of the CPU and simplify the circuit, on the basis of the circuit diagram of Figure 22 , the CPU adds a CPU feature output interface. The CPU feature output interface consists of CPU feature output interface A1, CPU feature output interface A2, and CPU feature output interface A3. (In this embodiment, only 2 to 3 characteristic signals are taken as an example, and the characteristic signals can also be 4 or 5). A total of 8 output interfaces are required for the CPU used by 101 optical switches, and the output interfaces are B1, B2.......B8, and the input interfaces are C1, C2.......C6; A total of 17 I / O ports and 5 output interfaces are required for the CPU used by 101 optical switches, further significantly reducing the number of output interfaces (from Figure 24 The CPU of the scheme requires 20 output interfaces to be reduced to 10 output interfaces), and further simplifies the electronic circuit. At the same time, the CPU requires a total of 10 output interfaces, making the CPU scanning and detection speed more than 10 times higher.

[0201] The CPU has 3 CPU feature output interfaces that emit different characteristic signals: CPU feature output interface A1, CPU feature output interface A2, and CPU feature output interface A3.

[0202] CPU feature output interface A1 is connected to multiple groups of LED groups, CPU feature output interface A2 is connected to multiple groups of LED groups, and CPU feature output interface A3 is connected to multiple groups of LED groups;

[0203] One group of LED feature groups is formed by connecting 3 groups of LED groups. Among them, each LED group that constitutes the LED feature group emits different characteristic signals.

[0204] The first LED feature group is connected to output interface B1, and the on / off of the first LED feature group is controlled by output interface B1. The first LED feature group is formed by connecting three LED groups, and each LED group emits different characteristic signals.

[0205] The second LED feature group is connected to the output interface B2, and the on / off of the second LED feature group is controlled by the output interface B2. The second LED feature group is formed by connecting three LED groups, and each LED group emits different characteristic signals.

[0206] The third LED feature group is connected to the output interface B3, and the on / off of the third LED feature group is controlled by the output interface B3. The third LED feature group is formed by connecting three LED groups, and each LED group emits different characteristic signals,.......

[0207] Such as Figures 16 - 18 And Figures 22 - 23 The light guide plate is divided into multiple light zones, and the optical signals propagating in each light zone are isolated from each other; the multiple light emitters in each light zone are optically connected to a group of optical connectors or an optical connector, and the optical connectors in each light zone are respectively connected to the signal input interface of the CPU; one light emitter in one light zone is connected to one light emitter in another light zone to form a light emitter connection group in which at most one light emitter in each light zone is interconnected, and the above connection process is repeated to form multiple light emitter connection groups.

[0208] The CPU has CPU characteristic output interfaces for outputting multiple different characteristic signals. Each CPU characteristic output interface is connected to multiple groups of light emitter connection groups. A light emitter characteristic group is formed by connecting multiple groups of light emitter connection groups. The light emitters in each group of light emitter connection groups that make up the light emitter characteristic group emit different characteristic signals; multiple light emitter characteristic groups are respectively connected to multiple CPU input interfaces of the CPU, and the on / off of each light emitter characteristic group is controlled by a CPU input interface of the CPU; during use, the CPU continuously detects the signals of each signal input interface.

[0209] The light guide plate is divided into n light zones, and the n light zones are respectively the first light zone 7a, the second light zone 7b, the third light zone 7c....... the nth light zone, and the optical signals in each light zone are isolated from each other;

[0210] The multiple light emitters in the first light zone 7a are optically connected to the first optical connector G1.

[0211] The multiple light emitters in the second light zone 7b are optically connected to the second optical connector G2.

[0212] The multiple light emitters in the third light zone 7c are optically connected to the third optical connector G3,.......

[0213] One light emitter in the first light zone 7a, one light emitter in the second light zone 7b, one light emitter in the third light zone 7c....... are electrically connected to form a light emitter connection group, and this connection is repeated accordingly to form the first light emitter connection group, the second light emitter connection group, the third light emitter connection group.......

[0214] The CPU has a CPU feature output interface for outputting multiple different feature signals. Each CPU feature output interface is connected to multiple groups of optical transmitter connection groups, and multiple groups of optical transmitter connection groups are connected to form an LED feature connection group. The optical transmitters in the same light area of the LED feature connection group all emit different feature signals;

[0215] Multiple LED feature connection groups are respectively connected to multiple CPU output interfaces of the CPU. The on / off of each LED feature connection group is controlled by a CPU output interface of the CPU. The CPU output interfaces are composed of output interface B1, output interface B2, output interface B3.......

[0216] The first LED feature connection group is connected to the output interface B1 of the CPU, and the on / off of the first LED feature connection group is controlled by the output interface B1. The second LED feature connection group is connected to the output interface B2 of the CPU, and the on / off of the second LED feature connection group is controlled by the output interface B2. The third LED feature connection group is connected to the output interface B3 of the CPU, and the on / off of the third LED feature connection group is controlled by the output interface B3.......

[0217] The first optical connector G1 in the first light area 7a, the second optical connector G2 in the second light area 7b, the third optical connector G3 in the third light area 7c....... are respectively connected to the first signal input port C1 of the CPU, the second signal input port C2 of the CPU, the third signal input port C3, the third signal input port C3 of the CPU....... in a corresponding manner;

[0218] During use, the CPU continuously detects the signals of the first signal input port C1, the second signal input port C2, the third signal input port C3......

[0219] The greatest advantage of the technical solution of the present invention is:

[0220] 1. Greatly reduce the cost of the keyboard using an optical switch (taking a 104-key keyboard as an example):

[0221] The light guide plate is divided into multiple light areas. The optical transmitter is connected to the on / off interface, and the optical connector is connected to the detection interface. The greatest advantage of this technical solution is:

[0222] ⑴ The prior art uses 104 optical emission tubes and 104 optical reception tubes. The present invention divides the light guide plate into 6 light areas and only uses 6 optical reception tubes, reducing 196 optical reception tubes;

[0223] ⑵ There are 208 pads for 104 optical receivers on the PCB board. The present invention only uses 6 optical receivers, and there are only 12 pads for optical receivers on the PCB board, reducing 196 PCB pads and 196 soldering processes.

[0224] ⑶ 196 connection lines on the PCB board are reduced, simplifying the electronic circuit.

[0225] 2. Greatly reduce the number of CPU I / O ports and greatly simplify the electronic circuit, accelerating the keyboard scanning speed: Existing computer keyboards have 104 key positions, 101 key positions, 84 key positions, etc. All computer keyboards have 6 rows. Taking a 104-keyboard as an example, there are at most 20 key positions in one row (the keyboard has at most 20 columns). If the optical switches are arranged in rows and columns, at most 20 columns * 6 rows = 120 optical switches can be arranged;

[0226] In the existing technology, a 104-keyboard has 104 optical switches. Using matrix circuit and wire-and logic, a total of 33 I / O ports are required for 104 optical receivers and 104 optical receivers.

[0227] ⑴ The present invention divides the light guide plate into 6 light zones (see Figure 17 , Figure 18 ) and adopts the light emitter connection group scheme (see Figure 21 , only 59 switches are drawn in the circuit diagram, and a total of 10 I / O ports are required for the CPU). Each light zone can arrange at most 20 optical switches. If 104 optical switches are adopted, 20 on-off interfaces and 6 detection interfaces are required, and a total of 26 I / O ports are required for the CPU, reducing 7 I / O ports compared with the existing technology;

[0228] See Figure 22 ⑶ The keyboard of the present invention divides the light guide plate into 6 light zones (see Figure 17 , Figure 18 ). Each light zone can arrange at most 20 optical switches. The number of characteristic output interfaces of the CPU is A = 2, so there are 10 groups of LED characteristic connection groups in each light zone, and the 10 groups of LED characteristic connection groups are electrically connected to 10 on-off interfaces B = 10 respectively. If 20 optical switches are set in each light zone, a total of 120 optical switches can be set in 6 light zones. There are characteristic output interfaces (A = 2), 10 on-off interfaces (B = 10), 10 groups of LED characteristic connection groups in each light zone, and the number of optical switches in each light zone is A * B = 2 * 10 = 20;

[0229] ⑵ The optimal technical solution is as follows: The CPU of the present invention has added 4 feature output interfaces (A = 4). Only 5 on-off interfaces (B = 5) and 6 detection interfaces (C = 6) are required for 104 optical switches. A total of 15 I / O ports of the CPU are needed, which is 18 fewer I / O ports compared with the prior art. Each optical zone is set with 20 optical switches. A total of 120 optical switches can be set in 6 optical zones. There are 4 feature output interfaces (A = 4), 5 on-off interfaces (B = 5). Each optical zone has 5 groups of LED feature connection groups. The number of optical switches in each optical zone is A * B = 4 * 5 = 20;

[0230] ⑶ Reducing the number of on-off interfaces speeds up the keyboard scanning speed.

[0231] 3. There is no key conflict for all key positions

[0232] The present invention can achieve no key conflict for the entire keyboard. When any n keys are pressed simultaneously, the CPU can recognize them, which is especially suitable for people who play games.

[0233] The prior art all adopts double-sided copper clad laminate to design double-sided PCB boards. After the significant reduction of electronic components and the simplification of electronic circuits, the present invention can adopt single-sided copper clad laminate to design single-sided PCB boards, further reducing the cost.

[0234] The greatest advantage of adopting optical switches is:

[0235] 1. Greatly reducing the cost of array switches

[0236] By adding optical switches in the light guide module and adding 101 light source parts 10-1, the cost of the light source part 10-1 is about 0.03 yuan per piece, while canceling the thin film array switch circuit using printed silver paste, and the thin film array switch circuit is about 8 yuan to 12 yuan per piece.

[0237] 2. Greatly improving the service life of the switch

[0238] The existing thin film array switch circuit is installed on the metal support plate 2. The number of openings of the thin film array switch circuit is the same as that of the metal support plate 2. The waterproof process of the thin film array switch circuit is complex and the reliability is poor. The light guide module of the present invention is installed under the metal support plate 2, with fewer process openings, simple waterproof process and outstanding waterproof performance.

[0239] Such as Figure 24 --- Figure 26The upper reflection diaphragm 6 and the lower reflection diaphragm 8 are respectively attached to the upper surface and the lower surface of the switch light guide plate 7. The lower reflection diaphragm 8 is provided with through holes at positions aligned with the guide plate horizontal holes 7-7 and the guide plate vertical holes 7-8 of the switch light guide plate 7. The through holes are the same size as the guide plate horizontal holes 7-7 and the guide plate vertical holes 7-8. Extension edges are provided in the through holes. The outer shape size of the lower reflection diaphragm 8 is the same as that of the upper reflection diaphragm 6. Extension edges are provided around the outer shape of the lower reflection diaphragm 8. After attaching the upper plane of the lower reflection diaphragm 8 to the lower surface of the switch light guide plate 7, the extension edges are bonded to the lower surface of the upper reflection diaphragm 6 to form a lower horizontal anti-extension edge 8-3 and a lower vertical anti-extension edge 8-2. Among them, the extended reflection film is formed by the lower horizontal anti-extension edge 8-3 and the lower vertical anti-extension edge 8-2. The lower horizontal anti-extension edge 8-3 is bonded to the lower surface of the upper reflection diaphragm 6, and the lower vertical anti-extension edge 8-2 covers the cross-section perpendicular to the upper and lower surfaces of the switch light guide plate 7. Covering the cross-section of the switch light guide plate 7 is to reduce light loss (after the light propagates to the cross-section of the switch light guide plate 7, it is reflected back into the switch light guide plate 7 by the lower vertical anti-extension edge 8-2). At the same time, the lower vertical anti-extension edge 8-2 plays a role in isolating each light area.

[0240] As Figure 27 --- Figure 28 The array optical switch module 3 is provided with exhaust grooves, which are composed of blocking exhaust grooves provided on the blocking switch piece 9 and switch board exhaust grooves provided on the switch light guide plate 7. Among them, the blocking exhaust grooves are composed of a blocking horizontal exhaust groove 9-9 and a blocking vertical exhaust groove 9-10. Among them, each row of horizontally arranged blocking horizontal exhaust grooves 9-9 communicates with the blocking lower through holes 9-5 of all the blocking switch pieces 9 in each row, and the blocking vertical exhaust groove 9-10 communicates with the blocking lower through holes 9-5 of the blocking switch piece 9.

[0241] The switch board exhaust grooves are composed of guide plate horizontal holes 7-7 and guide plate vertical holes 7-8.

[0242] As Figure 29 --- Figure 31 When the switch light guide plate 7 and the blocking switch piece 9 are stacked together, the space of the blocking horizontal exhaust groove 9-9 communicates with the space of the guide plate vertical hole 7-8, and the space of the blocking vertical exhaust groove 9-10 communicates with the space of the guide plate horizontal hole 7-7. An exhaust notch 9-11 penetrating the plate surface of the switch light guide plate 7 is provided on the switch light guide plate 7. It should be ensured that: the exhaust notch 9-11 is aligned with the switch board exhaust groove in position and communicates in space (in this embodiment, the exhaust notch 9-11 is aligned with the lower part of the blocking vertical exhaust groove 9-10 and communicates in space). An air filter material 12 composed of air filtering material is provided in the exhaust notch 9-11. The exhaust groove communicates with the atmosphere through the air filter material 12. The array optical switch module 3 is provided with an exhaust groove, which solves the problem that it is difficult to press down the reset body 4 after the optical switch is fully sealed.

[0243] Example 1, As Figures 32 - 44The light guide plate is composed of a switch light guide plate 7. The switch light guide plate 7 is provided with light guide plate through holes penetrating its plate surface. The light guide plate through holes are composed of an LED switch hole 7-9, a guide plate blocking hole 7-2, a left front light path hole 7-10, and a right front light path hole 7-11. Among them, the light emitter is a side-emitting light emitter, and the light emitter is located in the LED switch hole 7-9. The left front light path hole 7-10 and the right front light path hole 7-11 penetrate the plate surface of the switch light guide plate 7, and a front light path plate 7-12 is formed between the left front light path hole 7-10 and the right front light path hole 7-11. One end of the front light path plate 7-12 is located on the side wall of the LED switch hole 7-9 and is optically connected to the light emitter. The other end of the front light path plate 7-12 is located on the side wall of the guide plate blocking hole 7-2, and the front light path plate 7-12 is a part of the propagation light path.

[0244] A reflective film is pasted on both the upper and lower surfaces of the switch light guide plate 7. One of the reflective film sheets is provided with a right front reflection hole 6-5 and a left front reflection hole 6-4 penetrating its plate surface. The right front reflection hole 6-5 and the left front reflection hole 6-4 correspond to the positions of the right front light path hole 7-11 and the left front light path hole 7-10 respectively. The reflective film sheet has a right front extension film 6-8 and a left front extension film 6-7 extending outward respectively at the edges of the right front reflection hole 6-5 and the left front reflection hole 6-4 close to the front light path plate 7-12. The extended reflection film of the reflective film is composed of the right front extension film 6-8 and the left front extension film 6-7, and the extended reflection film of the reflective film is adhesively connected to the other reflective film sheet.

[0245] The left and right cross-sections of the front light path plate 7-12 are respectively covered by the left front extension film 6-7 and the right front extension film 6-8. The left and right cross-sections of the front light path plate 7-12 are formed by the formed right front reflection hole 6-5 and the left front reflection hole 6-4. The optical switch module further includes an optical resistance leakage part, and the optical resistance leakage part blocks the light signal from leaking out of the optical switch.

[0246] As Figure 32 This embodiment takes a 101-key laptop keyboard (with the largest usage amount of the array switch module) as an example to detail the light guide plate optical switch and the light guide plate array optical switch module of the present invention.

[0247] As Figures 33 - 34 、 Figure 33 is Figure 31 The G partial cross-sectional view of. The key device of one key position shown in the figure is composed of a keycap 1, a metal support plate 2, an array optical switch module 3, a reset body 4 (not shown in the figure), and a pair of plastic supports 5 (not shown in the figure).

[0248] As Figure 35, the array optical switch module 3 of the present invention is located below the metal support plate 2 of the notebook keyboard. The array optical switch module 3 is composed of an upper reflective diaphragm 6, a switch light guide plate 7, a lower reflective diaphragm 8, a blocking switch piece 9, an FPC circuit piece 10, a light-emitting light guide plate 13, etc. Among them, the upper reflective diaphragm 6 and the lower reflective diaphragm 8 are respectively attached to the upper surface and the lower surface of the switch light guide plate 7. In this embodiment, the switch light guide plate 7 is located between the blocking switch piece 9 and the FPC circuit piece 10 and above the FPC circuit piece 10 (the blocking switch piece 9 is located above the switch light guide plate 7), and the light-emitting light guide plate 13 is located above the blocking switch piece 9.

[0249] Such as Figures 35 - 36 , the switch light guide plate 7 is provided with an LED switch hole 7-9 and a guide plate blocking hole 7-2 penetrating through its plate surface; the light-emitting light guide plate 13 is provided with an LED light-emitting hole 13-2 and a light-emitting plate hole 13-3 penetrating through its plate surface. The light-emitting light guide plate 13 is made of a highly transparent material (such as a PC film, a PMMA film, a glass film, etc.). The upper and lower surfaces of the light-emitting light guide plate 13 are also respectively attached with upper and lower reflective films (not shown in the figure). The upper surface of the light-emitting light guide plate 13 is provided with a light guide dot part, and the light guide dot part is composed of a light-emitting guide dot 13-1. The light-emitting guide dot 13-1 is optically connected to the characters on the keycap 1 and makes the characters emit light; the blocking switch piece 9 is provided with an LED blocking hole 9-13 and a switch blocking body 9-14 penetrating through its plate surface; the flexible FPC circuit piece 10 is provided with a side-emitting side LED 10-6;

[0250] It should be ensured that the positions of the LED light-emitting hole 13-2, the LED blocking hole 9-13, the LED switch hole 7-9, and the side LED 10-6 are aligned. Among them, the LED light-emitting hole 13-2, the LED blocking hole 9-13, and the LED switch hole 7-9 can all accommodate the side LED 10-6;

[0251] It should be ensured that the switch blocking body 9-14 is aligned with the guide plate blocking hole 7-2, and the light-emitting plate hole 13-3 can accommodate the switch blocking body 9-14; it should be ensured that the LED switch hole 7-9 can accommodate the LED leakage blocking wall 9-12;

[0252] It should be ensured that the optical paths of the LED switch hole 7-9 and the guide plate blocking hole 7-2 are optically connected.

[0253] Such as Figures 37 - 38, the switch light guide plate 7 is provided with a light guide plate through hole penetrating its plate surface. The light guide plate through hole is composed of an LED switch hole 7-9, a guide plate blocking hole 7-2, a left front light path hole 7-10 and a right front light path hole 7-11. Among them, the light emitter is a side LED 10-6 that emits light from the side. The side LED 10-6 is located in the LED switch hole 7-9. The left front light path hole 7-10 and the right front light path hole 7-11 penetrate the plate surface of the switch light guide plate 7, and a front light path plate 7-12 is formed between the left front light path hole 7-10 and the right front light path hole 7-11; one end of the front light path plate 7-12 is located on the side wall of the LED switch hole 7-9 and is optically connected to the light emitter, and the other end of the front light path plate 7-12 is located on the side wall of the guide plate blocking hole 7-2. The front light path plate 7-12 is part of the propagation light path; the light emission window of the side LED 10-6 is located at one end of the front light path plate 7-12, and this end is located on the side wall of the guide plate blocking hole 7-2.

[0254] As Figures 39 - 40 , the blocking switch piece 9 is provided with an LED blocking hole 9-13 penetrating its plate surface. A light blocking and leakage preventing part is provided on the LED blocking hole 9-13. The light blocking and leakage preventing part is composed of an LED leakage preventing wall 9-12 and a long strip leakage preventing wall 9-14, or the light blocking and leakage preventing part is composed of an LED leakage preventing wall 9-12. The LED leakage preventing wall 9-12 is located at the hole edge of the LED blocking hole 9-13. The LED leakage preventing wall 9-12 is annular and protrudes from the surface of the blocking switch piece 9. A long strip leakage preventing wall 9-14 is provided on the reverse side of the plate surface of the blocking switch piece 9. The blocking switch piece 9 is also provided with an arched and elastic switch blocking body 9-14 (a blocking middle contact part 9-7 is provided at the top of the switch blocking body 9-14, and a light transmission notch 15 is opened on the LED leakage preventing wall 9-12 between the LED blocking hole 9-13 and the switch blocking body 9-14).

[0255] As Figures 41 - 44 , the metal support plate 2 is provided with a support plate middle hole 2-2. The support plate middle hole 2-2 corresponds to the position of the reset body 4. The blocking middle contact part 9-7 passes through the support plate middle hole 2-2, and its upper end surface is located above the upper surface of the metal support plate 2.

[0256] The side-emitting LED is located in the LED switch hole 7-9 of the light guide plate 10-1. The LED switch hole 7-9 is optically connected to the blocking through hole 9-2 and the optical connector. The light emission window of the LED corresponds to the light reception window of the optical connector and is optically connected; the blocking through hole 9-2 is optically connected to the optical connector. The light isolation sheet 9-16

[0257] As Figures 45 - 51 , the switch light guide plate 7 is divided into multiple light zones, and the optical signals in the multiple light zones are isolated from each other; in each light zone, multiple light emitters are respectively optically connected to a group of optical connectors or respectively optically connected to an optical connector.

[0258] AsFigure 46 The light guide plate is composed of a light-emitting light guide plate 13 and a switch light guide plate 7. The light-emitting light guide plate 13 is located above the switch light guide plate 7. Among them, a light guide dot 13-1 is provided on the upper surface of the light-emitting light guide plate 13, and the optical signal emitted by the optical transmitter is optically connected to the light guide dot 13-1. The light-emitting light guide plate 13 is provided with a light-emitting plate hole 13-3 penetrating through its plate surface; the blocking space 9-1 on the switch light guide plate 7 is aligned with the position of the light-emitting plate hole 13-3 on the light-emitting light guide plate 13; the LED light-emitting hole 13-2 provided on the light-emitting light guide plate 13 is aligned with the LED switch hole 7-9 provided on the switch light guide plate 7, and both the LED switch hole 7-9 and the LED light-emitting hole 13-2 can accommodate the optical transmitter.

[0259] As Figures 46 - 51 On the upper and lower surfaces of the switch light guide plate 7, a reflective film for reflecting optical signals is provided, and the reflective film is provided with an extended reflective film; the switch light guide plate 7 is provided with a guiding reflective hole 7-13 penetrating through its plate surface, and the cross-section formed by punching and forming the guiding reflective hole 7-13 is a guide plate end cross-section 7-14, and the extended reflective film covers the guide plate end cross-section 7-14 to form a light reflection surface;

[0260] The angle between the front guiding optical path 7-15 and the guide plate end cross-section 7-14 is equal to the angle between the reflective optical path 7-16 and the guide plate end cross-section 7-14, so that the optical signal emitted by the optical transmitter through the optical switch travels along the front guiding optical path 7-15 through the guide plate end cross-section 7-14 and the extended reflective film, and the extended reflective film reflects the optical signal, and the reflected optical signal is conducted along the reflective optical path 7-16 to the optical connector.

[0261] Reflective films are pasted on both the upper and lower surfaces of the switch light guide plate 7. The reflective film on the upper surface of the switch light guide plate 7 is provided with an extended reflective film or the reflective film on the lower surface of the switch light guide plate 7 is provided with an extended reflective film. The extended reflective film or the extended reflective film corresponds to the position of the guide plate end cross-section 7-14. The extended reflective film is bent to cover the guide plate end cross-section 7-14 and is connected to the lower reflective film or the extended reflective film is bent to cover the guide plate end cross-section 7-14 and is connected to the upper reflective film; the extended reflective film is composed of a vertical reflective edge 6-9 and a horizontal reflective edge 6-10.

[0262] The rest is the same as in Embodiment 1.

[0263] Embodiment 2

[0264] As Figures 51 - 55, A method for COB packaging LEDs on a flexible FPC circuit sheet. First: form LED vias 10-4 penetrating the board surface on the FPC circuit sheet 10, form electronic circuits 10-8 on the FPC circuit sheet 10, weld a thin sheet-like connecting conductor sheet 10-7 between the FPC cantilever plate 10-3 and the FPC extension plate 10-5, and perform COB packaging of LED chips on the FPC cantilever plate 10-3 to form LEDs 10-2 (the above process steps are not in sequence and can be adjusted according to production conditions);

[0265] Such as Figure 56 , Finally: a forming punch (not shown in the figure) enters the LED via 10-4, causing the connecting conductor sheet 10-7 to be bent by approximately 90 degrees, and together with the FPC cantilever plate 10-3 also forming a 90-degree angle with the large plane of the FPC circuit sheet 10, making the LED 10-2 a side-emitting LED.

[0266] The rest is the same as in Embodiment 1.

[0267] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the invention.

Claims

1. A light guide plate optical switch and a light guide plate array optical switch module, comprising a light emitter, a light receiver, a circuit chip, an optical switch, and a light guide plate. The optical signal emitted by the light emitter is optically conducted through the optical switch to the light receiver. When the optical switch is triggered, the propagation optical path between the light emitter and the light receiver is turned on or off. Characterized in that: The light guide plate is divided into multiple light zones, and the optical signals in the multiple light zones are isolated from each other. In each of the light zones, multiple light emitters are respectively optically conducted to two or three light receivers or respectively optically conducted to one light receiver. The light emitter is connected to the CPU output port, and the light receiver is connected to the CPU input port. The light emitters in each light zone can emit optical signals that can be recognized by the CPU. During use, the CPU detects the CPU input port. When a certain optical switch in a certain light zone is pressed, it is thus determined that a certain optical switch in a certain light zone is pressed.

2. A light guide plate optical switch and a light guide plate array optical switch module according to claim 1, Characterized in that: The light guide plate is composed of a switch light guide plate (7); the connection between the light emitter and the CPU output port is as follows: one light emitter in one light zone is connected to one light emitter in another light zone to form a light emitter connection group, and the above connection process is repeated to form multiple light emitter connection groups, and the multiple light emitter connection groups are respectively connected to multiple CPU output ports correspondingly.

3. A light guide plate optical switch and a light guide plate array optical switch module, comprising a light emitter, a light receiver, a circuit chip, an optical switch, and a switch light guide plate. The optical signal emitted by the light emitter is optically conducted through the optical switch to the light receiver; when the optical switch is triggered, the optical path between the light emitter and the light receiver is turned on or off. Characterized in that: The switch light guide plate (7) is divided into at least two light zones, which are respectively a first light zone (7a) and a second light zone (7b). The optical signal in the first light zone (7a) is isolated from the optical signal in the second light zone (7b). The light emission windows of multiple light emitters in the first light zone (7a) are optically conducted to multiple optical switches and the first light receiver, and the light emission windows of multiple light emitters in the second light zone (7b) are optically conducted to multiple optical switches and the second light receiver. One light emitter in the first light zone (7a) is connected to one light emitter in the second light zone (7b) to respectively form a first connected light emitter group, a second connected light emitter group, a third connected light emitter group,..., an nth connected light emitter group. The first connected light emitter group, the second connected light emitter group, the third connected light emitter group,..., the nth connected light emitter group are respectively connected to a first CPU output port, a second CPU output port, a third CPU output port,..., an nth CPU output port correspondingly. The first light receiver and the second light receiver are respectively connected to the first CPU input port of the CPU and the second CPU input port of the CPU. During use, the CPU continuously detects the signals of the first CPU input port and the second CPU input port. When the optical switch of the first optical zone (7a) is pressed, the CPU detects the change of the optical signal in the first optical zone (7a) by detecting the first CPU input port, and the CPU determines that a certain optical switch in the first optical zone (7a) is pressed according to the change of the optical signal; When the optical switch of the second optical zone (7b) is pressed, the CPU detects the change of the optical signal in the second optical zone (7b) by detecting the second CPU input port, and the CPU determines that a certain optical switch in the second optical zone (7b) is pressed according to the change of the optical signal.

4. A light guide plate optical switch and a light guide plate array optical switch module according to claim 1 or 2 or 3, Characterized in that: The light guide plate array optical switch module further includes a CPU, wherein the CPU is provided with a plurality of CPU output interfaces and a plurality of CPU input interfaces, the CPU output port is connected to the CPU output interface, and the CPU input port is connected to the CPU input interface; The CPU output port, the CPU input port, the CPU output interface, and the CPU input interface are located on the same circuit chip, or the CPU output port, the CPU input port, the CPU output interface, and the CPU input interface are respectively located on different circuit chips.

5. A light guide plate optical switch and a light guide plate array optical switch module according to claim 4, Characterized in that: The CPU continuously scans and detects each of the CPU input ports in a loop or continuously detects each of the CPU input ports simultaneously. When the CPU detects a signal change at a certain output port, the CPU determines which optical switch is triggered according to the optical transmitter connection group connected to the CPU output port and the optical zone where the optical transmitter connected to the optical transmitter connection group is located.

6. A light guide plate optical switch and a light guide plate array optical switch module according to claim 4, Characterized in that: The light guide plate array optical switch module further includes a light guide plate and an optical transmitter connection group. The light guide plate is divided into a plurality of optical zones. When the light guide plate array optical switch module works, the CPU connects one CPU output port, and at most one optical transmitter in each optical zone of the optical transmitter connection group connected to the CPU output port emits an optical signal. When two or three optical connectors in each optical zone receive the optical signal or one optical connector receives the optical signal, there is a signal input at each CPU input port connected to the optical transmitter connection group, and the CPU determines whether an optical switch is triggered in each optical zone, and the CPU closes the CPU output port; The CPU then connects another CPU output port, and at most one optical transmitter in each optical zone of the optical transmitter connection group connected to the CPU output port emits an optical signal. When two or three optical connectors in each optical zone receive the optical signal or one optical connector receives the optical signal, there is a signal input at each CPU input port connected to the optical transmitter connection group, and the CPU determines whether an optical switch is triggered in each optical zone, and the CPU closes the CPU output port; Continuously loop the above process; When a certain optical switch is triggered, the optical path of the optical region is blocked, so that the optical connector in the optical region cannot receive an optical signal, and there is no signal input at the CPU input port connected to the optical connector. The CPU determines the position of the optical switch according to the connected optical transmitter connection group and the corresponding relationship between the optical region and the optical connector.

7. An optical waveguide plate optical switch and an optical waveguide plate array optical switch module according to claim 2 or 3 or 5 or 6, Characterized in that: The optical waveguide plate array optical switch module further includes an optical transmitter connection group. Each CPU output port of the CPU emits different characteristic signals, and the optical transmitters connected by the optical transmitter connection group all emit different characteristic signals in the same optical region.

8. An optical waveguide plate optical switch and an optical waveguide plate array optical switch module, including an optical transmitter, an optical connector, a circuit chip, an optical switch, and an optical waveguide plate. The optical signal emitted by the optical transmitter is optically conducted with the optical connector through the optical switch; when the optical switch is triggered, the optical path between the optical transmitter and the optical connector is turned on and off. Characterized in that: The optical waveguide plate is divided into multiple optical regions, and the optical signals propagating in each optical region are isolated from each other; In each optical region, the optical paths of multiple optical transmitters are optically conducted with two or three optical connectors or one optical connector, and the optical connectors in each optical region are respectively connected to the signal input interfaces of the CPU; Connect one optical transmitter in one optical region to one optical transmitter in another optical region to form an optical transmitter connection group in which at most one optical transmitter in each optical region is connected to each other. Repeat the above connection process to form multiple optical transmitter connection groups; The CPU has CPU characteristic output interfaces for outputting multiple different characteristic signals. Each CPU characteristic output interface is connected to multiple groups of the optical transmitter connection groups. The optical transmitters of the multiple groups of the optical transmitter connection groups connected to form an optical transmitter characteristic group all emit different characteristic signals; Multiple optical transmitter characteristic groups are respectively connected to multiple CPU input interfaces of the CPU, and the on / off of each optical transmitter characteristic group is controlled by one CPU input interface of the CPU; During use, the CPU continuously detects the signals of each signal input interface.

9. An optical waveguide plate optical switch and an optical waveguide plate array optical switch module, including an optical transmitter, an optical connector, a circuit chip, an optical switch, and an optical waveguide plate. The optical signal emitted by the optical transmitter is optically conducted with the optical connector through the optical switch; when the optical switch is triggered, the optical path between the optical transmitter and the optical connector is turned on and off. Characterized in that: The optical waveguide plate is divided into n optical regions, which are the first optical region 7a, the second optical region 7b, the third optical region 7c... the nth optical region respectively. The optical signals in each optical region are isolated from each other; Optically conduct multiple optical transmitters in the first optical region 7a with the first optical connector G1, Optically conduct multiple optical transmitters in the second optical region 7b with the second optical connector G2, Optically conduct multiple optical transmitters in the third optical region 7c with the third optical connector G3, ... Optically conduct multiple optical transmitters in the nth optical region 7n with the nth optical connector Gn; Electrically connect one optical transmitter in the first optical region 7a, one optical transmitter in the second optical region 7b, one optical transmitter in the third optical region 7c... one optical transmitter in the nth optical region to form a group of connected optical transmitters. Repeat this connection to form the first group of connected optical transmitters, the second group of connected optical transmitters, the third group of connected optical transmitters... the nth group of connected optical transmitters; The CPU has CPU feature output interfaces that output multiple different feature signals. Each CPU feature output interface is connected to multiple groups of the connected optical transmitter groups. The multiple groups of connected optical transmitter groups are connected to form an LED feature connection group. The optical transmitters in the same optical region of the LED feature connection group all emit different feature signals; Multiple LED feature connection groups are respectively connected to multiple CPU output interfaces of the CPU. The on / off of each LED feature connection group is controlled by one CPU output interface of the CPU. The CPU output interfaces are composed of output interface B1, output interface B2, output interface B3... output interface Bn. Connect the first LED feature connection group to the output interface B1 of the CPU, and control the on / off of the first LED feature connection group by the output interface B1. Connect the second LED feature connection group to the output interface B2 of the CPU, and control the on / off of the second LED feature connection group by the output interface B2. Connect the third LED feature connection group to the output interface B3 of the CPU, and control the on / off of the third LED feature connection group by the output interface B3... control the on / off of the nth LED feature connection group; Connect the first optical connector G1 in the first optical region 7a, the second optical connector G2 in the second optical region 7b, the third optical connector G3 in the third optical region 7c... the nth optical connector Gn in the nth optical region 7n to the first signal input interface C1 of the CPU, the second signal input interface C2 of the CPU, the third signal input interface C3... the nth signal input interface Cn of the CPU respectively; During use, the CPU continuously detects the signals of the first signal input interface C1, the second signal input interface C2, the third signal input interface C3... the nth signal input interface Cn.

10. A light guide plate optical switch and a light guide plate array optical switch module according to claim 9, Characterized in that: The CPU has 2 CPU feature output interfaces that emit different feature signals: CPU feature output interface A1 and CPU feature output interface A2. The CPU feature output interface A1 is connected to multiple groups of the connected optical transmitter groups, and the CPU feature output interface A2 is connected to multiple groups of the connected optical transmitter groups; Two groups of the connected optical transmitter groups respectively connected to the CPU feature output interface A1 and the CPU feature output interface A2 are connected to form a first optical transmitter feature group, and the first optical transmitter feature group is then connected to the output interface B1. A second optical transmitter feature group is formed by connecting two groups of the optical transmitter connection groups respectively connected to the CPU feature output interface A1 and the CPU feature output interface A2, and the second optical transmitter feature group is further connected to the output interface B2. A third optical transmitter feature group is formed by connecting two groups of the optical transmitter connection groups respectively connected to the CPU feature output interface A1 and the CPU feature output interface A2, and the third optical transmitter feature group is further connected to the output interface B3,....... An nth optical transmitter feature group is formed by connecting two groups of the optical transmitter connection groups respectively connected to the CPU feature output interface A1 and the CPU feature output interface A2, and the nth optical transmitter feature group is further connected to the CPU output interface Bn; The on / off of the first optical transmitter feature group, the second optical transmitter feature group, the third optical transmitter feature group,....... the nth optical transmitter feature group are respectively controlled by the output interface B1, the output interface B2, the output interface B3,....... the output interface Bn.

11. A light guide plate optical switch and a light guide plate array optical switch module according to claim 8 or 9 or 10, Characterized in that: The light guide plate array optical switch module further includes a circuit chip, the circuit chip is provided with a CPU output port, a CPU input port, and a CPU feature output port, and the CPU is provided with a CPU output interface, a CPU input interface, and a CPU feature output interface; the CPU output port, the CPU input port, and the CPU feature output port are respectively correspondingly connected to the CPU output interface of the CPU, the CPU input interface of the CPU, and the CPU feature output interface of the CPU.

12. A light guide plate optical switch and a light guide plate array optical switch module according to claim 9 or 10, Characterized in that: The CPU has two CPU feature output interfaces that emit different feature signals: CPU feature output interface A1 and CPU feature output interface A2. When CPU feature output interface A1 emits 01 and CPU feature output interface A2 emits 10, it should be ensured that when CPU feature output interface A1 emits 0 and CPU feature output interface A2 emits 1, the two signals are synchronized in time; when CPU feature output interface A1 emits 1 and CPU feature output interface A2 emits 0, the two signals are synchronized in time, so as to ensure that only one group of optical emitter connection groups emits light at each moment. Or the CPU has three CPU feature output interfaces that emit different feature signals: CPU feature output interface A1, CPU feature output interface A2, and CPU feature output interface A3. When CPU feature output interface A1 emits 001, CPU feature output interface A2 emits 100, and CPU feature output interface A3 emits 010, it should be ensured that when CPU feature output interface A1 emits 0, CPU feature output interface A2 emits 1, and CPU feature output interface A3 emits 0, the three signals are synchronized in time; when CPU feature output interface A1 emits 0, CPU feature output interface A2 emits 0, and CPU feature output interface A3 emits 1, the three signals are synchronized in time; when CPU feature output interface A1 emits 1, CPU feature output interface A2 emits 0, and CPU feature output interface A3 emits 0, the three signals are synchronized in time, so as to ensure that only one group of optical emitter connection groups emits light at each moment.

13. A light guide plate optical switch and a light guide plate array optical switch module according to claim 2 or 3 or 8 or 9, characterized in that: when the number of optical emitters in each of the light areas is equal, the number of optical emitters in each group of optical emitter connection groups is the same; or when the number of optical emitters in each of the light areas is not equal, the number of optical emitters in some of the optical emitter connection groups is different.

14. A light guide plate optical switch and a light guide plate array optical switch module, comprising an optical emitter, an optical connector, a circuit chip, a light guide plate, and an optical switch, wherein, the optical signal emitted by the optical emitter is conducted through the propagation optical path on the light guide plate, the optical switch and the optical path of the optical connector. When the optical switch is triggered, the optical path between the optical emitter and the optical connector is turned on and off; It is characterized in that: the light guide plate is divided into multiple light regions. In each light region, multiple light emitters are respectively optically connected to two or three light connectors or are respectively optically connected to one light connector. The light guide plate is composed of a switchable light guide plate (7). The switchable light guide plate (7) is provided with light guide plate through holes penetrating through its plate surface. The light guide plate through holes are composed of LED switch holes (7-9), guide plate blocking holes (7-2), left front optical path holes (7-10) and right front optical path holes (7-11). Among them, the light emitter is a side-emitting light emitter, and the light emitter is located in the LED switch hole (7-9). The left front optical path hole (7-10) and the right front optical path hole (7-11) penetrate through the plate surface of the switchable light guide plate (7), and a front optical path plate (7-12) is formed between the left front optical path hole (7-10) and the right front optical path hole (7-11). One end of the front optical path plate (7-12) is located on the side wall of the LED switch hole (7-9) and is optically connected to the light emitter. The other end of the front optical path plate (7-12) is located on the side wall of the guide plate blocking hole (7-2). The front optical path plate (7-12) is a part of the propagation optical path.

15. A light guide plate optical switch and a light guide plate array optical switch module according to claim 14, It is characterized in that: A reflection film is pasted on both the upper and lower surfaces of the switchable light guide plate (7). One of the reflection films is provided with a right front reflection hole (6-5) and a left front reflection hole (6-4) penetrating through its plate surface. The right front reflection hole (6-5) and the left front reflection hole (6-4) correspond to the positions of the right front optical path hole (7-11) and the left front optical path hole (7-10) respectively; On the reflection film, on the sides of the right front reflection hole (6-5) and the left front reflection hole (6-4) close to the front optical path plate (7-12), there are respectively outwardly extending right front extension films (6-8) and left front extension films (6-7). The right front extension film (6-8) and the left front extension film (6-7) form the extension reflection film of the reflection film. The extension reflection film of the reflection film is adhesively connected to the other reflection film; The cross-sections on the left and right sides of the front optical path plate (7-12) are respectively covered by the left front extension film (6-7) and the right front extension film (6-8). The cross-sections on the left and right sides of the front optical path plate (7-12) are formed by forming the right front reflection hole (6-5) and the left front reflection hole (6-4).

16. A light guide plate optical switch and a light guide plate array optical switch module according to claim 14, It is characterized in that: The switchable light guide plate (7) is divided into multiple light regions, and the optical signals in the multiple light regions are isolated from each other; in each light region, multiple light emitters are optically connected to one light connector.

17. A light guide plate optical switch and a light guide plate array optical switch module according to claim 16, It is characterized in that: The optical switch module further includes a reflective film for reflecting optical signals. Reflective films for reflecting optical signals are provided on both the upper and lower surfaces of the switch light guide plate (7). The reflective film is provided with an extended reflective film; The switch light guide plate (7) is provided with a guiding reflective hole (7-13) penetrating through its plate surface. The cross-section formed by punching and forming the guiding reflective hole (7-13) is a guide plate end cross-section (7-14). The extended reflective film covers the guide plate end cross-section (7-14) to form an optical reflection surface; The angle between the front guiding optical path (7-15) and the guide plate end cross-section (7-14) is equal to the angle between the reflective optical path (7-16) and the guide plate end cross-section (7-14), so that the optical signal emitted by the optical transmitter through the optical switch is along the front guiding optical path (7-15), through the guide plate end cross-section (7-14), the extended reflective film. The extended reflective film reflects the optical signal, and the reflected optical signal is conducted along the reflective optical path (7-16) to the optical connector.

18. A light guide plate optical switch and a light guide plate array optical switch module according to claim 14, characterized in that: The light guide plate is composed of a light-emitting light guide plate (13) and a switch light guide plate (7). The light-emitting light guide plate (13) is located above the switch light guide plate (7). Among them, the upper surface of the light-emitting light guide plate (13) is provided with light-emitting guiding dots (13-1). The optical signal emitted by the optical transmitter is optically conducted with the light-emitting guiding dots (13-1). The light-emitting light guide plate (13) is provided with a light-emitting plate hole (13-3) penetrating through its plate surface; the blocking space (9-1) on the switch light guide plate (7) is aligned with the position of the light-emitting plate hole (13-3) on the light-emitting light guide plate (13); the LED light-emitting hole (13-2) provided on the light-emitting light guide plate (13) is aligned with the position of the LED switch hole (7-9) provided on the switch light guide plate (7). Both the LED switch hole (7-9) and the LED light-emitting hole (13-2) can accommodate the optical transmitter.

19. A light guide plate optical switch and a light guide plate array optical switch module according to claim 14, characterized in that: The optical switch module further includes a light blocking and leakage prevention part for blocking the leakage of optical signals from the optical switch.

20. A light guide plate optical switch and a light guide plate array optical switch module, including an optical transmitter, an optical connector, a circuit chip, a light guide plate, and an optical switch, wherein, The optical signal emitted by the optical transmitter is optically conducted through the propagation optical path on the light guide plate, the optical switch and the optical connector. When the optical switch is triggered, the optical path between the optical transmitter and the optical connector is turned on and off; Its characteristics are as follows: The light guide plate is divided into multiple light zones. In each light zone, multiple light emitters are respectively optically connected to two or three light connectors or are respectively optically connected to one light connector. The light guide plate is composed of a switchable light guide plate (7). The optical switch is composed of a switch blocking body (9-1) on a blocking switch sheet (9), the light emitter, the light connector, the switchable light guide plate (7), and a guide plate blocking hole (7-2) on the switchable light guide plate (7). Among them, the light emitter is composed of a light source part (10-1), and the light source part (10-1) is located within the guide plate blocking hole (7-2); The switch blocking body (9-1) is composed of a switch blocking plate (9-2), a blocking connecting plate (9-4), a lower through hole (9-5), a blocking arch spring piece (9-6), and a blocking middle body (9-8). Among them, the lower end of the blocking arch spring piece (9-6) is connected to the plate surface of the blocking switch sheet (9), the upper end of the blocking arch spring piece (9-6) is upwardly connected to the blocking middle body (9-8), and the lower through hole (9-5) penetrates through the blocking arch spring piece (9-6) to form the space of the lower through hole (9-5) or the lower through hole (9-5) penetrates through the blocking arch spring piece (9-6) and the plate surface of the blocking switch sheet (9) to form the space of the lower through hole (9-5); The switch blocking plate (9-2) is connected to the blocking middle body (9-8) through the blocking connecting plate (9-4), and the blocking connecting plate (9-4) is aligned with the space position of the lower through hole (9-5).

21. A light guide plate optical switch and a light guide plate array optical switch module, Its characteristics are as follows: The light guide plate is divided into multiple light zones. In each light zone, multiple light emitters are respectively optically connected to two or three light connectors or are respectively optically connected to one light connector. The light guide plate array optical switch module is provided with a blocking switch sheet (9). The blocking switch sheet (9) is composed of a switch blocking body (9-1). The switch blocking body (9-1) is composed of a switch blocking plate (9-2), a blocking connecting plate (9-4), a lower through hole (9-5), a blocking arch spring piece (9-6), and a blocking middle body (9-8); The lower end of the blocking arch spring piece (9-6) is connected to the plate surface of the blocking switch sheet (9), the upper end of the blocking arch spring piece (9-6) is upwardly connected to the blocking middle body (9-8), and the elastic blocking arch spring piece (9-6) supports the blocking middle body (9-8); The lower through hole (9-5) penetrates through the blocking arch spring piece (9-6) to form the space of the lower through hole (9-5) or the lower through hole (9-5) penetrates through the blocking arch spring piece (9-6) and the plate surface of the blocking switch sheet (9) to form the space of the lower through hole (9-5); Above the space of the lower through hole (9-5), there is provided the switch blocking plate (9-2), and the switch blocking plate (9-2) is connected to the blocking middle body (9-8) through the blocking connecting plate (9-4); When the resistance middle body (9-8) is pressed, the resistance middle body (9-8) moves downward against the elastic force generated by the resistance arch spring piece (9-6), and the blocking connecting plate (9-4) enters the space of the lower resistance through hole (9-5).

22. A light guide plate optical switch and a light guide plate array optical switch module according to claim 20 or 21, characterized in that: The light source part (10-1) is composed of 3 LEDs (10-2). The 3 LEDs (10-2) are mutually at an angle of 120 degrees. The 3 lower resistance through holes (9-5) are mutually at an angle of 120 degrees. The LEDs (10-2) are respectively located in the lower resistance through holes (9-5).

23. A light guide plate optical switch and a light guide plate array optical switch module according to claim 20 or 21, characterized in that: The light source part (10-1) is composed of 2 LEDs (10-2). The 2 LEDs (10-2) are mutually at an angle of 180 degrees. The 2 lower resistance through holes (9-5) are mutually at an angle of 180 degrees. The LEDs (10-2) are respectively located in the lower resistance through holes (9-5).

24. A light guide plate optical switch and a light guide plate array optical switch module according to claim 20 or 21, characterized in that: The light source part (10-1) is composed of 1 LED (10-2). The LED (10-2) is located in 1 lower resistance through hole (9-5).

25. A light guide plate optical switch and a light guide plate array optical switch module according to claim 20 or 21, characterized in that: The space surrounded by the support resistance middle body (9-8), the blocking connecting plate (9-4), and the switch blocking plate (9-2) is the upper resistance space (9-3). The upper resistance space (9-3) of the switch blocking body (9-1) can accommodate the LED (10-2).

26. A light guide plate optical switch and a light guide plate array optical switch module according to claim 20 or 21, characterized in that: A metal support plate (2) is arranged above the array optical switch module (3). The metal support plate (2) is provided with an outer support plate hole (2-1) and a middle support plate hole (2-2) penetrating through its plate surface. The switch blocking body (9-1) is provided with a resistance middle body (9-8) and a switch blocking plate (9-2); The resistance middle body (9-8) and the switch blocking plate (9-2) are respectively located in the middle support plate hole (2-2) and the outer support plate hole (2-1).

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