CN109302170B - Analog key, terminal device and control method of analog key - Google Patents
Analog key, terminal device and control method of analog key Download PDFInfo
- Publication number
- CN109302170B CN109302170B CN201811007137.4A CN201811007137A CN109302170B CN 109302170 B CN109302170 B CN 109302170B CN 201811007137 A CN201811007137 A CN 201811007137A CN 109302170 B CN109302170 B CN 109302170B
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- light
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- reflected light
- analog key
- pressing stroke
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/9627—Optical touch switches
- H03K17/9631—Optical touch switches using a light source as part of the switch
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/964—Piezo-electric touch switches
Abstract
The invention discloses an analog key, a terminal device and a control method of the analog key, wherein the analog key comprises the following steps: a substrate; the keycap is movably connected to the substrate to move close to and away from the substrate; the photoelectric sensing device is arranged on one of the substrate and the keycap and transmits detection light to the other one of the substrate and the keycap, and the photoelectric sensing device also receives reflected light of the detection light; and the signal processing unit is electrically connected with the photoelectric sensing device, determines the pressing stroke of the analog key by receiving the reflected light fed back by the photoelectric sensing device, and sends out a corresponding operation signal according to the pressing stroke. The technical scheme of the invention provides a photoelectric type simulation key.
Description
Technical Field
The invention relates to the technical field of analog keys, in particular to an analog key, terminal equipment and a control method of the analog key.
Background
At present, the simulation button is mostly modes such as potentiometre, silica gel pad with carbon film, hall and realizes, however, the general structure of the implementation mode of above-mentioned simulation button relates to complicacy, and has higher to applicable environment requirement. For example, the potentiometer and the silica gel pad with carbon film are complicated in structure design and have large errors (for example, the carbon film printing resistance has an error of about 20%), and the hall mode analog key has high requirements for structure precision and peripheral magnetic environment.
Disclosure of Invention
The invention mainly aims to provide an analog key, and aims to provide a photoelectric analog key.
In order to achieve the above object, the present invention provides an analog key comprising:
a substrate;
the keycap is movably connected with the substrate to move close to and away from the substrate;
the photoelectric sensing device is arranged on one of the substrate and the keycap and transmits detection light to the other, and the photoelectric sensing device also receives reflected light of the detection light; and
and the signal processing unit is electrically connected with the photoelectric sensing device, determines the pressing stroke of the simulation key by receiving the reflected light fed back by the photoelectric sensing device, and sends out a corresponding operation signal according to the pressing stroke.
Optionally, the photoelectric sensing device is disposed on the substrate, the keycap has a light-transmitting portion, and the photoelectric sensing device transmits detection light to the light-transmitting portion.
Optionally, the keycap is integrally formed by a transparent material; alternatively, the first and second liquid crystal display panels may be,
the keycap comprises a keycap body with a mounting hole and the light transmission part fixedly arranged in the mounting hole.
Optionally, the light emitted by the photo-sensing device comprises invisible light, and the invisible light comprises directionally emitted infrared light.
Optionally, the photoelectric sensing device is disposed on the substrate, the keycap is provided with a light reflecting member facing the substrate, and the photoelectric sensing device transmits detection light to the light reflecting member; or
The photoelectric sensing device is arranged on the keycap, the substrate is provided with a reflecting piece facing the keycap, and the photoelectric sensing device sends detection light to the reflecting piece.
Optionally, the simulated key further comprises an elastic resetting member, the elastic resetting member is arranged between the key cap and the substrate, and the key cap is movably connected with the substrate through the elastic resetting member.
The invention further provides terminal equipment which comprises the simulation key.
The invention also provides a control method for simulating the keys, which comprises the following steps:
acquiring reflected light of the detection light propagating along the axis direction of the analog key;
determining the pressing stroke of the simulation key according to the reflected light;
and sending out a corresponding operation signal according to the pressing stroke.
Optionally, the step of determining the pressing stroke of the analog key according to the reflected light specifically includes: acquiring the pressing stroke of the simulation key according to the light intensity change of the reflected light; or acquiring the pressing stroke of the simulation key according to the corresponding relation between the light intensity change of the reflected light and the preset light intensity change-pressing stroke.
Optionally, a keycap of the analog key has a light-transmitting portion, the detection light is sent toward the light-transmitting portion, and when the obtained light intensity of the reflected light is greater than or equal to a preset value, it is determined that the keycap is in contact.
Optionally, the detection light is intermittently transmitted towards the light-transmissive portion before it is determined that the key cap is touched, and the detection light is continuously transmitted towards the light-transmissive portion after it is determined that the key cap is touched until it is determined that the key cap is no longer touched.
According to the technical scheme, the distance between the keycap and the substrate is reduced along with the pressing of the keycap by the finger of a user, namely the turning back distance of the detection light sent by the photoelectric sensing device is reduced, so that the reflected light reflected back to the photoelectric sensing device is changed, then the change of the reflected light is converted into an electric signal by the photoelectric sensing device and is transmitted to the signal processing unit, the signal processing unit determines the pressing stroke of the simulation key according to preset information after receiving the transmitted electric signal, and then sends out a corresponding operation signal according to the determined pressing stroke; in addition, in the technical scheme, through the arrangement of the simple substrate, the key cap, the photoelectric sensing device and the signal processing unit, the pressing stroke can be determined through photoelectric signals, the operation signal output of the analog key is realized, the structure of the analog key is simple, the assembly is convenient, the requirement on the application environment is not high, and the application range is wider.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an exemplary embodiment of an analog key; wherein, the state that the simulation key-press is not touched;
FIG. 2 is a schematic structural diagram of the simulated key in FIG. 1 in a touched state;
FIG. 3 is a schematic diagram of the connection between the photoelectric sensing device of the analog key shown in FIG. 1 and the signal processing unit;
FIG. 4 is a flowchart illustrating a method for controlling an analog key according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) |
| 10 | |
20 | |
| 21 | |
22 | Light-transmitting |
| 30 | |
31 | |
| 32 | Light-receiving |
40 | |
| 41 | |
42 | |
| 50 | Elastic reset piece |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, and the like under a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an analog key.
Referring to fig. 1 to 3, in an embodiment of the present invention, the analog key includes:
a substrate 10;
a key cap 20 movably connected to the substrate 10 to move toward and away from the substrate 10;
the photoelectric sensing device 30 is arranged on the substrate 10, and transmits detection light to the keycap 20, and the photoelectric sensing device 30 also receives reflected light of the detection light; and
and the signal processing unit 40 is electrically connected with the photoelectric sensing device 30, determines the pressing stroke of the analog key by receiving the reflected light fed back by the photoelectric sensing device 30, and sends out a corresponding operation signal according to the pressing stroke.
In the present embodiment, generally, the substrate 10 is provided as a circuit board; preferably, the signal processing unit 40 is integrated on the circuit board to simplify the structure of the analog key, facilitating a miniaturized setup of the analog key.
Generally, the photo-sensor device 30 includes a light emitting portion 31 and a light receiving portion 32, wherein the light emitting portion 31 transmits detection light, the light receiving portion 32 receives reflected light of the detection light, and the signal processing unit 40 is electrically connected to the light receiving portion 32. As the user presses the key cap 20 with a finger, the distance between the key cap 20 and the substrate 10 decreases, that is, the folding distance of the detection light decreases, so that the reflected light reflected back to the light receiving section 32 changes, and the light receiving section 32 generally converts the change of the reflected light into a digital signal and transmits the digital signal to the signal processing unit 40; of course, in other embodiments, the light receiving unit 32 may also transmit the analog signal corresponding to the change of the reflected light to the signal processing unit 40.
In this embodiment, the signal processing unit 40 generally includes a microprocessor 41 and a memory 42, wherein the microprocessor 41 is electrically connected to the light receiving portion 32, and after receiving the digital signal transmitted from the light receiving portion 32, determines the pressing stroke of the analog key according to the preset information of the memory 42, and then sends out the corresponding operation signal according to the determined pressing stroke; of course, in other embodiments, the preset information may also be stored in the microprocessor 41 itself, that is, the microprocessor 41 itself has a storage space, and no additional memory 42 is needed, in this case, after the microprocessor 41 receives the change of the reflected light fed back by the light receiving portion 32, the microprocessor 41 determines the pressing stroke of the analog key according to the preset information stored in the microprocessor 41 itself.
It should be noted that, in the present embodiment, the change of the reflected light fed back to the signal processing unit 40 by the photo sensor device 30 is generally a light intensity change, and it can be understood that as the distance between the key cap 20 and the substrate 10 decreases, the light intensity of the fed back reflected light increases. However, the present design is not limited thereto, and in other embodiments, the change of the reflected light fed back to the signal processing unit 40 by the photo sensor device 30 may also be a change of an offset distance of an incident point of the reflected light.
In the technical scheme of the invention, through the arrangement of the simple substrate 10, the key cap 20, the photoelectric sensing device 30 and the signal processing unit 40, the pressing stroke can be determined through photoelectric signals, the operation signal output of the analog key is realized, and the analog key has a simple structure and is convenient to assemble.
In this embodiment, the analog key typically further includes an elastic reset element 50, the elastic reset element 50 is disposed between the key cap 20 and the substrate 10, and the key cap 20 is movably connected to the substrate 10 through the elastic reset element 50, such that the key cap 20 has a self-resetting capability, that is, the key cap 20 can be reset to the initial position by a restoring force provided by the elastic reset element 50 after the key cap 20 is pressed. However, the present design is not limited thereto, and in other embodiments, the elastic restoring member 50 may not be added, so that the user needs to manually lift the key cap 20 after pressing is completed, so as to restore the key cap 20.
Optionally, the elastic reset piece 50 is configured as a compression spring, on one hand, the compression spring is low in cost and simple and convenient to install, and the compression spring has good reset elasticity, so that the key cap 20 is reset more reliably; on the other hand, the shorter the compression spring is compressed, the larger the restoring force that can be provided by the compression spring is, so that in the simulated key, the additional arrangement of the compression spring can also enable the keycap 20 to provide the pressure change experience effect for the user. However, the design is not limited thereto, and in other embodiments, the elastic restoring element 50 may also be configured as an elastic rubber sleeve, a reed set, or a combination of the above components with restoring elasticity.
In the present embodiment, further, the key cap 20 has a light-transmitting portion 22, and the photo-electric sensing device 30 transmits the detection light to the light-transmitting portion 22, so that when the user's finger is not placed on the key cap 20, the detection light is directly transmitted through the light-transmitting portion 22 without forming the reflected light reflected back to the photo-electric sensing device 30; when a user places a finger on the key cap 20, the detection light passes through the light-transmitting portion 22 and then is folded back by the finger to form a reflection light reflected back to the photoelectric sensing device 30, and then the photoelectric sensing device 30 feeds back the light intensity of the reflection light to the microprocessor 41, so that when the light intensity of the reflection light by the microprocessor 41 is greater than or equal to a preset value, the key cap 20 can be determined to be touched. That is, the analog key according to the present embodiment can recognize a finger that is not pressed but is only placed on the key top 20 without providing an additional structure or circuit. However, the present design is not limited thereto, and in other embodiments in which the photoelectric sensing device 30 is disposed on the substrate 10, a light reflecting member facing the substrate 10 may be further disposed on the key cap 20, and the photoelectric sensing device 30 transmits the detection light to the light reflecting member, so that the reflected light is formed more effectively, the sensitivity of the photoelectric sensing device 30 to the change of the reflected light is improved, and the sensitivity of the analog key operation signal is improved.
In addition, it should be noted that, in some other embodiments of the present invention, the photoelectric sensing device 30 may also be disposed on the key cap 20, the substrate 10 is disposed with a reflective member facing the key cap 20, and the photoelectric sensing device 30 transmits the detection light to the reflective member, so as to form an effective reflected light.
In the present embodiment, the key cap 20 is formed by combining the key cap body 21 and the light-transmitting portion 22 which are independent from each other, specifically, the key cap body 21 has a mounting hole, and the light-transmitting portion 22 is fixed in the mounting hole. However, the design is not limited thereto, and in other embodiments, the key cap 20 may be integrally formed by a transparent material. In this embodiment, the transparent portion 22 is usually made of a transparent material to increase the intensity of the reflected light, so as to increase the sensitivity of the analog key; of course, in other embodiments, the transparent portion 22 may be made of a translucent material, as long as it can effectively transmit light.
Optionally, in this embodiment, the light-transmitting portion 22 is fixed to the key cap body 21 by secondary injection molding, so as to ensure reliable fixation between the light-transmitting portion 22 and the key cap body 21. However, the design is not limited to this, and in other embodiments, the light-transmitting portion 22 may be fixed in the mounting hole of the key cap body 21 by tight fitting or adhesive fitting.
In the present embodiment, further, the light emitted by the photo-electric sensing device 30 includes invisible light; it can be understood that the use of invisible light can reduce the discomfort caused by the light of the analog key to the user. However, the present design is not limited thereto, and in other embodiments, the photo sensor device 30 may also emit visible light to obtain a more dazzling appearance, so as to enhance user experience.
In the present embodiment, preferably, the invisible light emitted by the photo sensor device 30 includes infrared light; infrared light is readily available and safer than ultraviolet light.
Further, the infrared light includes directionally emitted infrared light; it will be appreciated that directional emission is advantageous for efficient formation of reflected light. Optionally, the photo sensor device 30 includes an infrared light source, and a reflective cup cooperating with the infrared light source, the reflective cup directionally emitting the infrared light emitted by the infrared light source to the light-transmitting portion 22. However, the present design is not limited thereto, and in other embodiments, the infrared light emitted by the photo sensor device 30 may also include laser, and it can be understood that the laser has a good directional emission characteristic. Optionally, in this embodiment, the infrared light source is an infrared LED, and the infrared LED has a good directional emission characteristic and is low in cost; of course, in other embodiments, the infrared light source may also include other light sources capable of emitting infrared light.
The present invention further provides a terminal device, where the terminal device includes an analog key, and the specific structure of the analog key refers to the foregoing embodiments, and the terminal device adopts all technical solutions of all the foregoing embodiments, so that the terminal device at least has all beneficial effects brought by the technical solutions of the foregoing embodiments, and details are not repeated here.
The invention also provides a control method for simulating the keys.
Referring to fig. 4, in an embodiment of the present invention, the following steps are included:
step S10, acquiring reflected light of the detection light propagating along the axial direction of the analog key;
step S20, determining the pressing stroke of the analog key according to the reflected light;
and step S30, sending out corresponding operation signals according to the pressing stroke.
In this embodiment, the light propagating along the axis direction of the analog key may be emitted by a component of the analog key itself, or may be provided by another device, and the propagation direction may be a direction toward the keycap or a direction away from the keycap, as long as the distance between the return position of the detection light and the receiving position of the reflection light decreases with the increase of the keycap pressing stroke; therefore, the reflected light can have changes along with the key cap being pressed, when the signal processing unit of the analog key receives the changes of the reflected light, the pressing stroke of the analog key can be determined according to the preset information, and then the corresponding operation signal is sent out according to the determined pressing stroke; in other words, the technical scheme realizes that the pressing stroke is determined through the photoelectric signal and the operation signal output of the analog key is realized.
In this embodiment, the change of the reflected light is generally a light intensity change, and it can be understood that the light intensity of the reflected light fed back increases with the increase of the pressing stroke of the key cap. However, the present design is not limited thereto, and in other embodiments, the change of the reflected light may be a change of an offset distance of an incident point of the reflected light.
In this embodiment, step S30 is specifically: acquiring the pressing stroke of the analog key according to the light intensity change of the reflected light; the manner of obtaining the simulated key stroke may include calculation, it is understood that the preset information is a corresponding calculation program, generally, the light intensity variation is in positive correlation with the key stroke, which is generally in direct proportion, or may be non-linear, and of course, the manner of obtaining the simulated key stroke may also include simulation and the like. However, the design is not limited thereto, and the step S30 may further specifically be: acquiring the pressing stroke of the simulation key according to the light intensity change of the reflected light and a preset light intensity change-pressing stroke corresponding relation; it can be understood that, at this time, the preset information is a light intensity variation-pressing stroke corresponding relationship, and the signal processing unit may simply obtain the pressing stroke in an inquiry manner, which, of course, needs to be obtained through a previous experiment.
In this embodiment, the key cap of the analog key has a light-transmitting portion, the detection light is sent toward the light-transmitting portion, and when the obtained light intensity of the reflected light is greater than or equal to a preset value, it is determined that the key cap is touched. Therefore, when the user finger is not placed on the keycap, the detection light can be directly transmitted out through the light-transmitting part, and the reflected light cannot be formed; when a user places fingers on the keycap, the detection light passes through the light-transmitting part and then is folded back by the fingers to form reflected light, and then the light intensity of the reflected light can be fed back to the signal processing unit for simulating the key, so that when the light intensity of the reflected light is greater than or equal to a preset value, the keycap is determined to be contacted. That is to say, the analog key according to the technical solution of the present embodiment can recognize a finger that is only placed on the key cap but not pressed without providing an additional structure or circuit.
In this embodiment, further, before it is determined that the key cap is touched, the detection light is intermittently transmitted toward the light-transmitting portion, so that energy consumption of the simulated key can be saved.
Further, after determining that the key cap is touched, continuously transmitting the detection light towards the light-transmitting part until determining that the key cap is no longer touched; therefore, whether the simulation key is in a long-time contact state or not can be judged more effectively. Without loss of generality, the analog key can be generally applied to a game pad, and the operation instruction corresponding to short-time touch pressing (single clicking) and the operation instruction corresponding to long-time touch pressing (long pressing) are generally different, for example, when the game pad is applied to a shooting game, the operation instruction corresponding to the single clicking of the analog key is generally shot once, and the operation instruction corresponding to the long pressing is generally shot continuously.
It should be noted that, in this embodiment, after it is determined that the key cap is no longer touched, it can be determined that the detection light transmission mode adopted by the analog key is intermittent before it is determined that the key cap is touched.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An analog key, comprising:
a substrate;
the keycap is movably connected with the substrate to move close to and away from the substrate, and is provided with a light transmission part;
the photoelectric sensing device is arranged on the substrate and sends detection light to the light-transmitting part, the photoelectric sensing device also receives reflected light of the detection light, and when the light intensity of the obtained reflected light is larger than or equal to a preset value, the keycap is determined to be in contact with the keycap; and
and the signal processing unit is electrically connected with the photoelectric sensing device, determines the pressing stroke of the simulation key by receiving the reflected light fed back by the photoelectric sensing device, and sends out a corresponding operation signal according to the pressing stroke.
2. The analog key of claim 1, wherein the key cap is integrally formed of a light transmissive material; alternatively, the first and second electrodes may be,
the keycap comprises a keycap body with a mounting hole and the light transmission part fixedly arranged in the mounting hole.
3. The analog key of claim 1, wherein said light emitted by said photo-sensing device comprises invisible light, said invisible light comprising directionally emitted infrared light.
4. The analog key of any one of claims 1 to 3, further comprising an elastic restoring member, wherein the elastic restoring member is disposed between the key cap and the substrate, and the key cap is movably connected to the substrate through the elastic restoring member.
5. A terminal device, characterized in that it comprises an analog key according to any one of claims 1 to 4.
6. A control method of an analog key is characterized in that a keycap of the analog key is provided with a light-transmitting part, and the control method of the analog key comprises the following steps:
acquiring reflected light of the detection light propagating toward the light-transmitting portion; when the obtained light intensity of the reflected light is larger than or equal to a preset value, determining that the keycap is contacted;
determining the pressing stroke of the simulation key according to the reflected light;
and sending out a corresponding operation signal according to the pressing stroke.
7. The method for controlling an analog key of claim 6, wherein the step of determining the pressing stroke of the analog key according to the reflected light comprises:
and acquiring the pressing stroke of the simulation key according to the light intensity change of the reflected light.
8. The method for controlling an analog key of claim 7, wherein the step of obtaining the pressing stroke of the analog key according to the light intensity variation of the reflected light comprises:
calculating the pressing stroke of the simulation key according to the light intensity change of the reflected light; alternatively, the first and second liquid crystal display panels may be,
and acquiring the pressing stroke of the simulation key according to the light intensity change of the reflected light and a preset light intensity change-pressing stroke corresponding relation.
9. The method of claim 6, wherein said detecting light is intermittently transmitted toward said light-transmissive portion before said key cap is determined to be touched, and wherein said detecting light is intermittently transmitted toward said light-transmissive portion, and
after determining that the key cap is touched, continuously transmitting the detection light toward the light-transmissive portion until determining that the key cap is no longer touched.
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| CN201811007137.4A CN109302170B (en) | 2018-08-30 | 2018-08-30 | Analog key, terminal device and control method of analog key |
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| CN201811007137.4A CN109302170B (en) | 2018-08-30 | 2018-08-30 | Analog key, terminal device and control method of analog key |
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| CN109302170B true CN109302170B (en) | 2022-07-22 |
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| CN112820570B (en) * | 2020-12-30 | 2022-10-04 | 歌尔科技有限公司 | Key mechanism and wearable device with same |
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| 追求极致手感 CHERRY MX BOARD 1.0 TKL机械键盘体验评测;黄贞璇;《消费电子 》;20171231;86-87 * |
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| CN109302170A (en) | 2019-02-01 |
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