TW201911019A - Input method and device - Google Patents

Abstract

An input method and device thereof, the input device comprises a light-emitting module, a light-receive module, a light-identifying module, and a micro controller. The method comprises following steps: The light-emitting module projects visible light to a projected surface. The light-receiving module catches the reflected light caused by user's operating. Confirms the reflected light whether a valid input or an invalid input through the identification of the light-identifying module. Composing these input results in a code, and finds a corresponding symbol from a code table, then outputting the corresponding symbol. Compared to prior art, the present invention should solve the input inconvenience problem caused by the user interface size of intelligent device; moreover, the operation is intuitive, and no need for complex light source positioning technology.

Description

   Input method and device   

The present invention relates to an input method and device, in particular to an input method and device for projecting visible light and receiving reflected light of visible light and converting it into a code.

The development of most consumer electronic products, especially portable electronic input devices, has a tendency to streamline and reduce size. Too large input devices are not portable, but due to ergonomic and visual restrictions, too small input devices will also Decreasing the comfort level of the user, so how to achieve a win-win situation between the convenience of carrying and the operating experience is a problem to be solved urgently.

Take common smartphones on the market as an example. Generally, the keyboard is displayed on the LCD screen. When using it, you must touch the position of the keys corresponding to the touch screen keyboard. The more keys, the larger the screen area occupied by the keyboard, and the relative shrinkage. In view of the display area of other content on the screen, in terms of the size of the input device relative to its input content, this input method is not the method with the highest utilization rate.

In the former case CN102591464B, a laser virtual keyboard is proposed as an input device, which projects a virtual keyboard onto a plane from a projection module provided on an electronic product display screen. When a user taps a key on the virtual keyboard, the projection position is projected. At that time, two electric lasers at different positions emit light beams to the user's finger, and the reflected laser light is accepted by the light sensor and passed through the triangulation method, and the keys are pressed back to input corresponding information. This case solves the volume limitation of the previous physical keyboard, but also extends two new problems. One is that the input device must be installed on a stable interface in advance, and the other is that the input device still needs to be ergonomic. With a proper size of the plane, the device still has room for improvement in the technological development trend that emphasizes efficiency and flexibility.

In response to the foregoing problems, one category of the present invention is to provide an input device that can easily and accurately emit and receive visible light for users to input information without being restricted by a plane.

According to an embodiment of the device of the present invention, the input device includes a light emitting module, a light receiving module, a light identification module, and a microcontroller. The light-emitting module is used for projecting visible light; the light-receiving module is used for receiving the reflected light of the visible light; the light-recognition module is coupled to the light-receiving module and includes a light intensity detecting unit for detecting the intensity of the reflected light. When the reflected light intensity is greater than or equal to a predetermined threshold, the reflected light is regarded as a valid input, otherwise it is regarded as an invalid input; the microcontroller is coupled to the light emitting unit and the light receiving module, and a coded comparison table is stored. The combination of the valid input and invalid input of the reflected light into a code, and then finding a symbol corresponding to the code from the code comparison table and outputting it.

In one embodiment of the device of the present invention, the light emitting module may project at least one visible light according to a predetermined timing.

In an embodiment of the device of the present invention, the light identification module further includes a light color identification unit coupled to the light receiving module to detect whether the color of the reflected light is the same as the color of the projected colored visible light. If the colors are the same, It is further detected whether the intensity of the colored visible light is greater than or equal to a predetermined threshold, otherwise it is regarded as an invalid input.

In one embodiment of the device of the present invention, the light-emitting module in the input device includes at least one light-emitting unit. Each light-emitting unit includes a light emitter and a lens. The light emitter emits colored visible light. The lens projects visible light to a light source. The projection surfaces are such that the projection positions of the colored visible light do not interfere with each other.

In one embodiment of the apparatus of the present invention, the predetermined timing further includes emitting visible light every 50 milliseconds.

Another category of the present invention is to provide an input method suitable for use with an input device. The input device includes a light emitting module, a light receiving module, a light identification module, and a microcontroller. The input method includes the following steps: light emitting The module projects visible light onto a projection surface; at this time, a user interferes with the projection surface to generate reflected light of visible light; the light receiving module receives reflected light; the light recognition module detects the intensity of the reflected light, and when the intensity of the reflected light is When it is greater than or equal to a predetermined threshold, the reflected light is regarded as a valid input, otherwise it is regarded as an invalid input; and the microcontroller combines the valid input and the invalid input of the reflected light into a code, and then is stored in the microcontroller Find a symbol corresponding to the encoding in the encoding comparison table of and output it.

In one embodiment of the method of the present invention, the light emitting module is required to project at least one visible light according to a predetermined timing.

In an embodiment of the method of the present invention, the light recognition module further includes a light color recognition unit, and the input method further includes the step of: the light color recognition unit measures whether the color of the reflected light is the same as the color of the visible visible light to be detected. Only when the colors are the same, it is further detected whether the intensity of the colored visible light is greater than or equal to a predetermined threshold, otherwise it is regarded as an invalid input.

In summary, the device and method provided by the present invention allow a user to project visible light to a projection surface through a light emitting module, and receive reflected light formed by the user's operation with a light receiving module, and pass the light intensity detection unit. Identification by a predetermined threshold and a light color recognition unit, confirming that the reflected light is a valid input or an invalid input, combining all input results into a code, and then finding the corresponding symbol from the code comparison table and outputting it. Because the light receiving module only needs to absorb the reflected light with sufficient intensity, the position, surface material, distance from the light emitting module of the projection surface, or whether the user directly contacts the projection surface is not a necessary condition when the light receiving module receives .

Compared with the conventional technology, the present invention uses a visible light area as an interface for user input, and can flexibly use space without being limited to a sufficiently large planar area necessary for a virtual keyboard. Furthermore, the color of the visible light is different, and the input color is sometimes more intuitive than the input symbol. Furthermore, the conventional technology must emit a second light source such as laser or infrared light after projecting the input interface, and then use a complicated light source positioning technology to detect the user input message. However, the present invention only needs to project visible light and receive reflection. Light can be converted into user input information according to the code, which reduces the technical complexity and provides a more accurate input method for users.

1, 2‧‧‧ input device

3, 4‧‧‧ input method

11, 21‧‧‧Temporary storage unit

12, 22‧‧‧light emitting module

14, 24‧‧‧ light receiving module

16, 26‧‧‧light identification module

161, 261‧‧‧ Light Intensity Detection Unit

262‧‧‧light color recognition unit

18, 28‧‧‧ microcontroller

121, 221‧‧‧ Illuminator

122, 222‧‧‧ lens

R1 ~ R9‧‧‧step flow

R41 ~ R42‧‧‧step flow

S1 ~ S9‧‧‧step flow

FIG. 1 is a functional block diagram of a specific embodiment of an input device according to the present invention.

FIG. 2 is a functional block diagram of a specific embodiment of an input device according to the present invention.

FIG. 3 is a schematic flowchart of a specific embodiment of an input method according to the present invention.

FIG. 4A and FIG. 4B are schematic flowcharts of another embodiment of the input method according to the present invention.

Please refer to FIG. 1. FIG. 1 is a functional block diagram of a specific embodiment of the input device 1 according to the present invention. One category of the present invention is to provide an input device 1. According to a specific embodiment, the input device 1 includes a light-emitting module 12, a light-receiving module 14, a light-recognition module 16, and a microcontroller 18. The light emitting module 12 is used for projecting visible light to a projection surface to form a projection area. The light emitting module 12 includes at least one light emitting unit. Each light emitting unit includes a light emitter 121 and a lens 122. The light emitter 121 may be A light-emitting diode (LED) light-emitting unit is used to emit visible light, and when the lens 122 can refract the visible light emitted from the light emitter 121 to the projection surface, the visible light projection areas overlap or do not interfere with each other. The projection surface is not limited to a flat surface. The light receiving module 14 is used to receive the reflected light generated by the interference of visible light by a user. The user interference to generate the reflected light includes directly touching the projection area with a finger or forming an object by projecting into the projection area to generate a shadow and generate light. reflected light.

In an embodiment, the input device 1 of the present invention may be built in an electronic device, such as a smart bracelet, and connected to a terminal device, such as a smart phone, a tablet computer, or a personal computer. Electronic device. However, the present invention is not limited to this. The input device 1 of the present invention may be built on any device that can project light as an input interface, such as a portable projector.

In one embodiment, the light receiving module 14 can be a phototransistor, a photodarlington transistor, a photothyristor, and a photodiode integrated circuit ( Photo IC) or a photo diode.

The light identification module 16 is coupled to the light receiving module 14 and includes a light intensity detection unit 161 for detecting the intensity of the reflected light. When the light intensity detection unit 161 detects and determines that the intensity of the reflected light is greater than or equal to a predetermined At the threshold, the reflected light is regarded as a valid input, otherwise it is an invalid input. The range of the predetermined threshold of the reflected light intensity may be between 0.01 and 1 lux (Lx), and the range of the predetermined threshold of the reflected light intensity may be 0.1 lux (Lx).

The microcontroller 18 is coupled to the light-emitting module 12 and the light-receiving module 14 and stores a code comparison table. The input result of the reflected light is combined to form a code, and then one of the codes corresponding to the code is found from the code comparison table. Symbol and output it.

For example, in one embodiment, the light-emitting module 12 of the input device 1 of the present invention has a light-emitting unit, and projects a single-color visible light onto a projection surface at a predetermined timing to form a projection area. The predetermined time sequence includes that the projection time of each visible light is about 3 seconds, and the interval between each projection of visible light is about 50 milliseconds, and a total of five times of visible light are projected. When the light emitting module 12 projects visible light, a user directly touches the projection area with a finger or an object, or interferes with the projection area to generate reflected light by reaching into the projection area without touching the projection area. The light receiving module 14 then receives the reflected light generated by the interference of the projection area, and then the light intensity detection unit 161 detects whether the light intensity of the reflected light is greater than or equal to the aforementioned predetermined threshold. If the detected light intensity is greater than or equal to the aforementioned predetermined threshold, the interference result is regarded as a valid input; if not, the interference result is regarded as an invalid input. However, the predetermined timing for projecting visible light according to the present invention is not limited to the foregoing content, and the user may modify the content of the predetermined timing for projecting visible light according to the present invention.

The input device 1 of the present invention further includes a temporary storage unit 11 for temporarily storing sequentially the input results determined by the light intensity detection unit 161. After the temporary storage unit 11 collects an input result equivalent to the number of times of light emission in a predetermined sequence, it sequentially combines the valid input and the invalid input into an input result combination, and outputs it to the microcontroller 18. The microcontroller 18 then combines the input results with a code comparison table stored in the microcontroller 18 as shown in Table 1 below for comparison. The number of time series of the code comparison table must be equal to the number of times of light emission in the predetermined time series. If the input result combination has a corresponding symbol in the code comparison table, the microcontroller 18 outputs the symbol corresponding to the input result combination. Among them, when the temporary storage unit 11 collects the total number of input results equivalent to the coding required in the code comparison table, it sequentially combines the valid input and the invalid input into an input result combination, and outputs it to the microcontroller 18 .

1: valid input 0: invalid input

Furthermore, the light-emitting module 12 may have N light-emitting units emitting N visible light on the projection surface at any timing in accordance with a predetermined timing to form N non-interfering projection areas, where N is equal to or greater than 1. Natural numbers, and N varies from one timing to another. For example, in actual application, the predetermined timing includes the projection time of each visible light is about 2 seconds, the interval between each projection of visible light is about 1 second, and a total of 3 times of visible light is projected, wherein the first timing emits a visible light to Forming a projection area, the second timing emits two visible light to form two non-interfering projection areas, the third timing emits four visible light to form four non-interfering projection areas, and so on. And with the change in the number of projection areas, there can also be changes in position between the projection areas. At this time, the user has to interfere with any projection area to generate reflected light at any timing. The reflected light is received by the light receiving module 14 and the light intensity detection unit 161 determines whether it is a valid input. At this time, the code comparison table is shown in Table 2.

1: valid input 0: invalid input

In addition, the number of projection areas can also be used to indicate the current light emission timing. For example, the light emitting module 12 emits a visible light at a first timing to form a projection area, emits two visible light at a second timing to form two projection areas that do not interfere with each other, and emits three visible light at a third timing to form three Non-interfering projection area. This can remind the user that it is currently at the light-emitting sequence, so that the user can input the instruction conveniently. The change in the number of projection areas is only used to remind the user of the current lighting sequence, and the position of the projection area that the user contacts does not affect the input result.

Please refer to FIG. 2, which is a functional block diagram of a specific embodiment of the input device 2 according to the present invention. The present invention further provides an input device 2 including a light emitting module 22, a light receiving module 24, a light identification module 26, and a microcontroller 28. The light-emitting module 22 includes at least one light-emitting unit. Each light-emitting unit includes a light-emitting device 221 and a lens 222. The light-emitting device 221 may be a light-emitting diode (LED) light-emitting unit. When the visible light is emitted, the lens 222 can refract the visible light emitted by the light emitter 221 to the projection surface, so that the projection areas of the visible light do not interfere with each other. According to this embodiment, the number of the light emitting modules 22 can be five, so as to simultaneously project visible light of five different colors, such as red, yellow, green, blue, and purple, and make the projection areas of the visible light of each color mutually. Neighbors without interference. However, the present invention is not limited to this. The light emitting module 22 may project a plurality of colored visible lights through a plurality of light emitters 221. The color of the visible light can also be arbitrarily selected among the known light colors for easy mutual recognition. Colored visible light.

However, the present invention is not limited to projecting five different colors of visible light at the same time. The light emitting module 22 can also project different colors of visible light to the projection surface according to a predetermined timing. Seconds, the interval between each projection of visible colored light is about 50 milliseconds, a total of five projections. In this embodiment, visible light of different colors can be sequentially projected to the same projection area on the projection surface in a predetermined timing sequence. When the visible light emitted by the light emitter 221 is refracted to the projection surface by the lens 222, the projection area of visible light is allowed. Do not interfere with each other. When the light emitting module 22 projects visible light, the user directly touches the projection area with a finger or an object, or interferes with the projection area to generate reflected light by reaching into the projection area without touching the projection area. However, the predetermined timing for projecting visible light according to the present invention is not limited to the foregoing content, and the user may modify the content of the predetermined timing for projecting visible light according to the present invention. That is, the user can adjust the predetermined timing of projecting visible light to project at least one visible light at the same time. Therefore, the predetermined timing for the light emitting module to emit light includes the predetermined timing for the light emitting module to emit light simultaneously.

The light recognition module 26 of the input device 2 includes a light intensity recognition unit 261 and a light color recognition unit 262. The light recognition module 26 is coupled to the light receiving module 24. The light color recognition unit 262 is used to detect the color of the reflected light. Whether the wavelength is the same as the wavelength of the color to be detected. In one embodiment, the number of the light identification modules 26 and the light emitting modules 22 are equal, and one light identification module 26 is functionally corresponding to one light emitting module 22 to form a group of light transmitting and receiving combinations. For example, if a certain light emitting unit 221 projects visible red light, the corresponding light color identification unit 262 correspondingly detects red reflected light; and so on, if there are four other light emitting units 221 each projecting four For visible light of colors, such as yellow, green, blue, and purple, the corresponding detected color of the light color identification unit 262 is yellow, green, blue, and purple. If the color wavelength of the reflected light is the same as the color wavelength to be detected, the light intensity identification unit 261 further detects whether the intensity of the reflected light is greater than or equal to a predetermined threshold. If a reflected light is positive in the determination process of the light color identification unit 262 and the light intensity detection unit 261, that is, the reflected light color is the same as the light emission color, and the intensity of the reflected light is also greater than or equal to the aforementioned predetermined threshold, then For valid input, if any of the judgment processes fail, it is regarded as invalid input, and the input signal is transmitted to the microcontroller 28.

In another embodiment, the lens 222 can refract the visible light emitted by the light emitter 221 to a projection surface, and the projection areas refracted by the visible light are staggered with each other to form a projection area of another color. For example, two sets of light emitting modules 22 project red and green light respectively, and emit light simultaneously, so that three projection areas such as red, green, and yellow generated by mixing red light and green light are formed on the projection surface. At this time, the corresponding relationship between the light recognition module 26 and the light emitting module 22 is not one-to-one. For example, the aforementioned two groups of light emitting modules 22 respectively project red and green light, and form red, green and For three projection areas such as yellow, three light recognition modules 26 are required to detect the reflected light of three colors, such as red, green, and yellow.

In another embodiment, the light recognition module 26 must first detect whether the visible light intensity reaches a predetermined threshold with the light intensity detection unit 261, and if the predetermined threshold is reached, further identify the color wavelength of the reflected light with the light color recognition unit 262, If a reflected light is positive in the determination process of the light intensity detection unit 261 and the light color identification unit 262, that is, the reflected light color is the same as the light emission color, and the intensity of the reflected light is also greater than or equal to the aforementioned predetermined threshold, then In order to be valid input, if any of the judgment processes fail, it is regarded as invalid input, and the result of this input is output to the microcontroller 28.

In an embodiment, the microcontroller 28 may be a central processing unit. When the microcontroller 28 receives the current total number of input results equal to the total number required for encoding, it combines all of its input results into an encoding, and then returns the encoding comparison table Find the symbol corresponding to this code and output it. For example, as shown in Table 2 below, the light color recognition unit 262 can identify five colors of visible light. Each color of visible light has two types of invalid input and valid input. Then its code comparison table can store 2 ⁵ combined codes, and This combination code corresponds to 32 symbols or commands.

1: valid input 0: invalid input

Please refer to FIG. 3. FIG. 3 is a schematic flowchart of a specific embodiment of an input method according to the present invention. Another aspect of the present invention is to provide an input method 3. According to a specific embodiment, the input method 3 is suitable for use with the input device 1. The input device 1 includes a temporary storage unit 11, a light emitting module 12, a light receiving module 14, a light identification module 16, and a microcontroller 18. The method includes the following steps: S1: The light emitting module projects visible light onto a projection surface. S2: The user approaches the projection surface and generates reflected light. S3: The light receiving module receives the reflected light. S4: The light recognition module determines the reflected light. S5: Output an input result to the register. S6: Determine whether the total number of input results currently matches the total number required for encoding. S7: Combining the input results into codes. S8: Find the corresponding symbol in the code comparison table. S9: Output symbol.

In step S1: the light emitting module projects visible light onto a projection surface, and the light emitting module 12 projects visible light onto a projection surface at a predetermined timing to form a projection area, wherein the projection surface is not limited to a flat surface, and the predetermined timing includes each The projection time of the secondary visible light is about 3 seconds, and the interval between each projection of the visible light is about 50 milliseconds, and the visible light is projected five times in total. However, the predetermined timing for projecting visible light according to the present invention is not limited to the foregoing content, and the user may modify the content of the predetermined timing for projecting visible light according to the present invention.

Then in step S2: the user approaches the projection surface to generate reflected light, and the visible light in the projection area is interfered by a user to generate a reflected light. The user interference to generate the reflected light includes directly touching the projection area with a finger, Or, an object is projected into the projection area to form a shadow and generate reflected light. Next, in step S3: the light receiving module receives the reflected light, and the light receiving module 14 then receives the reflected light generated by the interference of the projection area.

In step S4: the light recognition module determines the reflected light. The light recognition module 16 includes a light intensity detection unit 161 for detecting the intensity of the reflected light. When the light intensity detection unit 161 detects that the intensity of the reflected light is greater than or equal to When a predetermined threshold is set, the reflected light is regarded as a valid input, otherwise it is regarded as an invalid input. The range of the predetermined threshold of the reflected light intensity may be between 0.01 and 1 lux (Lx), and the range of the predetermined threshold of the reflected light intensity may be 0.1 lux (Lx).

Then, in step S5, an input result is output to the temporary register, and the foregoing valid input and invalid input are regarded as input results, and temporarily stored in the temporary storage unit 11. For example, the valid input is 1, and the invalid input is 0. If valid input, invalid input, and invalid input have been output in order, (1,0,0) is output to the temporary storage unit 11 for temporary storage.

In step S6: it is determined whether the current total number of input results matches the total number required for encoding. If it is determined to be consistent, it proceeds to the next step S7, and if it does not match, it returns to step S3 again. For example, the light emitting module 12 needs to emit visible light four times in a predetermined timing, but only three input results (1,0,0) are temporarily stored in the temporary storage unit 11, and the total number of input results is three, and the process returns to step S3. After receiving the reflected light again, the pending storage unit 11 receives four input results, and then proceeds to the next step.

Then in step S7, the input results are combined into a code, and the input order of the input results is sorted to form a code. And in step S8: find the corresponding symbol in the code comparison table, compare the code and the code comparison table. For example, referring to Table 1 above, the code formed in step S7 is (1,0,0,1), then the corresponding symbol Is the number "9". In step S9: the output symbol, the number “9” is output to a terminal device, such as a smart phone, a tablet computer, or an electronic device such as a personal computer.

Please refer to FIG. 4, which illustrates another specific input method 4. This input method 4 is suitable for use with the input device 2. Except for step R1 and step S1 of input method 3 between input method 4 and input method 3, the operation details of the steps are slightly different because of the different hardware configurations. For example, step R1 further projects at least one visible light at the same time. For example, five kinds of visible light are projected, and the colors are red, yellow, green, blue, and purple. In addition, step S4 is replaced by steps R41 and R42, and the remaining steps are the same as the input method 3, which will not be repeated here in this specification.

According to this specific implementation method, the light recognition module 26 in the input device 2 includes a light color recognition unit 262 and a light intensity recognition unit 261. The light intensity detection unit 261 determines whether the reflected light intensity is greater than or equal to a predetermined threshold, and the light color recognition The unit 262 detects whether the color of the reflected light matches a color to be detected. In one embodiment, the light-emitting module 22 and the light-recognition module 26 correspond to each other in terms of the number of functions and corresponding functions, that is, a light-recognition module. 26 corresponds to at least a corresponding light emitting module 22, and the light identification module 26 only detects the color and intensity of the reflected light of the visible light emitted by the corresponding light emitting module 22. Therefore, in the input method 4, after receiving the reflected light in step R3, the process proceeds to step R41, and the light intensity detection unit 261 determines whether the reflected light intensity is greater than or equal to a predetermined threshold, and then proceeds to step R42, and the light color recognition unit 262 determines the reflection Whether the light color matches the color to be detected. The color to be detected must be the color of visible light emitted by one light-emitting module 22, or the projected color of visible light projected by a plurality of light-emitting modules 22 after overlapping. When the light intensity detection unit 261 detects that the intensity of the reflected light is greater than or equal to a predetermined threshold, and the light color recognition unit 262 detects that the color of the reflected light matches the color to be detected, the reflected light is regarded as a valid input. If the intensity of the reflected light is less than A predetermined threshold, or the color of the reflected light does not match the color to be detected, is an invalid input. However, the order of R41 and R42 in the present invention is not limited to the foregoing. The user can modify the order of R41 and R42 in the present invention according to personal requirements.

In step R8, each of the numbers, letters, or Zhuyin output symbols in the code comparison table can be first formed by color coding. For example, as shown in Table 2, the letter B in the code comparison table is red + yellow and the letter I is red + purple. When the user interferes with the red and yellow projection surfaces formed by the light emitting module 22, the letter B is output.

In one embodiment, the user can use the input method and device of the present invention to control appliances in the home. For example, the input device 2 is a smart bracelet. The smart bracelet can project red, yellow, green, blue, and purple visible light to form a projection surface on the palm, the back of the arm, or the side of the arm. The terminal is controlled by the input device 2. When the device is a lamp holder with five colors of red, yellow, green, blue, and purple, the user can interfere with the red projection surface formed by the projection of the smart bracelet, and command the lamp holder of the terminal device to light up the red light bulb. Intuitively control light colors. The code comparison table at this time corresponds to the input result of the user to the visible light color emitted by the lamp holder.

In another embodiment, the input device 2 is a smart bracelet or a wireless remote control, and the terminal device controlled by the input device 2 is a smart phone. When the touch screen of the smart phone is the user input interface, Designed with a red display area (i.e., projection area) corresponding to the phone function, a yellow display area corresponding to the camera function, a green display area corresponding to the web browser function, a blue display area corresponding to the calendar function, and a purple display area corresponding to In the mail function, when the user interferes with the light emitting module 22, that is, the purple projection area formed by the touch screen projection display, the smart phone executes the mail application. Therefore, one aspect of the present invention is that the function of the terminal device has an operation mode corresponding to a color shortcut key. At this time, the code comparison table may be a color correspondence relationship.

In summary, the device and method provided by the present invention allow a user to project visible light to a projection surface through a light emitting module, and receive reflected light formed by the user's operation with a light receiving module, and pass the light intensity detection unit. Identification by a predetermined threshold and a light color recognition unit, confirming that the reflected light is a valid input or an invalid input, combining all input results into a code, and then finding the corresponding symbol from the code comparison table and outputting it. Because the light receiving module only needs to receive the reflected light of sufficient intensity caused by the operator, the position of the projection surface, the surface material, the distance from the light emitting module, or whether the user directly contacts the projection surface is not received by the light receiving module. Necessary conditions.

Compared with the conventional technology, the present invention uses a visible light area as an interface for user input, and can flexibly use space without being limited to a sufficiently large planar area necessary for a virtual keyboard. Second, the color of the visible light is different, and the input color is sometimes more intuitive than the input symbol. Furthermore, the conventional technology must emit a second light source such as laser or infrared light after projecting the input interface, and then use a complex light source positioning technology to detect the user input message. However, the present invention only needs to project visible light and receive reflection. Light can be converted into user input information according to the code, which reduces the technical complexity and provides a more accurate input method for users.

The device and method of the present invention do not need to completely touch the characteristics of a solid plane, and can be used in equipment that needs to be avoided in laboratories, radiation or medical environments with high health requirements; it is not necessary to leave fingerprints on a fixed physical plane, and it can also The invention is used for security protection when inputting a password; the present invention is particularly suitable for use without complicated input situations, such as a smart bracelet or a client-side menu.

With the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be more clearly described, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the patents to be applied for in the present invention. Therefore, the scope of the patent scope of the present invention should be interpreted in the broadest sense according to the above description, so that it covers all possible changes and equal arrangements.

Claims (10)

    An input device includes: a light emitting module for emitting visible light; a light receiving module for receiving reflected light of the visible light; a light identification module coupled to the light receiving module and including a light intensity A detecting unit for detecting the intensity of the reflected light; when the intensity of the reflected light is greater than or equal to a predetermined threshold, the reflected light is regarded as a valid input; otherwise, it is not; and a microcontroller, coupled The light emitting module and the light receiving module store a code comparison table, which is suitable for combining the effective input of the reflected light into a code, and then find a symbol corresponding to the code from the code comparison table, and To output.         The input device according to item 1 of the scope of patent application, wherein the light emitting module is required to emit at least one visible light according to a predetermined sequence, and the predetermined sequence includes simultaneously emitting at least one visible light.         The input device according to item 2 of the scope of patent application, wherein the light recognition module further includes a light color recognition unit coupled to the light receiving module to detect whether the color of the reflected light and the colored visible light are emitted. The colors are the same. If the colors are the same, it is further detected whether the intensity of the colored visible light is greater than or equal to the predetermined threshold, otherwise it is not.         The input device according to item 3 of the scope of patent application, which includes a plurality of the light emitting modules, and the light color recognition unit may further detect the projected colors of the visible light projected by the light emitting modules, and the visible light If the projection color formed after the overlap is the same as the projection color to be detected, then it is further detected whether the intensity of the visible light is greater than or equal to the predetermined threshold, otherwise it is not.         The input device according to item 2 of the scope of patent application, wherein the light-emitting module includes a plurality of light-emitting units, and each of the light-emitting units includes a light emitter and a lens, the light emitter is used to emit the visible light, and the lens makes the visible light Projected onto a projection surface, so that the projection positions of the visible light do not interfere with each other.         The input device according to item 3 of the patent application scope, wherein the predetermined timing further includes emitting the visible light every 50 milliseconds.         An input method is suitable for use with an input device. The input device includes a light emitting module, a light receiving module, a light identification module, and a microcontroller. The input method includes the following steps: the light emitting module Projects visible light onto a projection surface; a user contacts the projection surface to generate reflected light of the visible light; the light receiving module receives the reflected light; the light recognition module detects the intensity of the reflected light, and when the reflected light When the intensity of the reflected light is greater than or equal to a predetermined threshold, the reflected light is regarded as a valid input, otherwise it is not; and the microcontroller combines the valid input of the reflected light into a code, and the Find a symbol corresponding to the code in a code comparison table and output it.         The input method according to item 7 of the scope of patent application, wherein the light emitting module is required to emit at least one visible light according to a predetermined sequence, and the predetermined sequence includes simultaneously emitting at least one visible light.         The input method according to item 7 of the patent application scope, wherein the light recognition module further includes a light color recognition unit, and the input method further includes the step of: the light color recognition unit detects whether the color of the reflected light is different from the emitted light The colored visible light has the same color, and if the colors are the same, it is further detected whether the intensity of the colored visible light is greater than or equal to the predetermined threshold, and vice versa.         The input method according to item 9 of the scope of patent application, which includes a plurality of the light emitting modules, and the light color recognition unit may further detect the projected colors of the visible light projected by the light emitting modules and the visible light. If the projection color formed after the overlap is the same as the projection color to be detected, then it is further detected whether the intensity of the visible light is greater than or equal to the predetermined threshold, otherwise it is not.