69 results about "Projection keyboard" patented technology

The invention discloses an air projection keyboard which comprises an air screen generator, a projection system, an infrared camera system, a processing system and an indicator lamp. The air projection keyboard operates according to the main principle: the air screen is an air wall formed by transparent or semitransparent gas (such as vapor); the projection system projects a virtual image of a keyboard to the air wall; when fingers operate the virtual keyboard in a virtual image area, the infrared camera system acquires sensed information of infrared radiation change in the area; the processing system receives the sensed information and calculates push content information of the fingers and transmits the information to an external output device. The virtual keyboard is projected to the air screen with no need of any object or plane. The virtual keyboard is available for both sides and has the artistic effect of stereo projection.

The invention discloses an implementation method of a virtual mobile phone keyboard. The method comprises the following steps of: creating a projection keyboard template, and projecting the projection keyboard template to a surface of a certain adjacent interface, wherein the projection keyboard template can be generated by a laser diode of a projection component; illuminating a light source of the diode through a high-efficiency holographic optical element which is specially designed to generate an accurate QWERTY keyboard display region; and projecting an invisible plane at a place which is higher than a projection surface by a few millimeters. The method has the advantages that: the defects of smaller mobile phone key region of a QWERTY keyboard and difficulty in operation are overcome; a mobile phone keyboard is projected to a certain medium interface by optical projection; the operation coordinates of a projection keyboard by a user are positioned by an optical sensor; and an image is fed back to a processor and subjected to impact analysis processing to obtain an accurate key value, so that an optical projection keyboard function of a mobile phone is realized.

The invention discloses a miniature projection device and a gesture control method of the projection device. The miniature projection device comprises a miniature projection device main body and a gesture detection module; the miniature projection device main body comprises a projection keyboard module, a projection screen module and a processing and calculating module; the projection keyboard module is used for inputting information to the processing and calculating module; the projection screen module is used for displaying an image output by the processing and calculating module; and the gesture detection module is used for detecting an operation gesture of a user on the screen and transmitting a gesture signal to the processing and calculating module. The miniature projection device disclosed by the invention has the advantages of small volume and convenient carrying, and an external projection device is directly replaced by a projection computer screen, therefore the miniature projection device is more suitable for office, training and other occasions; and a page turning function and a marking function f the screen are realized by detecting the operation of the human hand on the projected screen, therefore when the user explains the projection contents, the user can quickly and conveniently operate the projection contents.

A projection keyboard real time dynamic automation calibration method relates to a projection keyboard automation calibration method, and aims to solve the problems that an existing calibration method is large in calibration errors; the method comprises the following steps: using an identification camera to take a LED calibration board image, and calculating an internal parameter matrix of the camera and a distortion coefficient of a distortion model; projecting the projection keyboard on a movable plane, calibrating the relative position relation between the camera and the projection keyboard in real time, and calculating image coordinates of calibration reference points; using the projection keyboard to calculate the relative position relation between the camera and the projection keyboard and determining world coordinates of the calibration reference points; building a transformation equation of the reference points transforming from the camera coordinates to the world coordinate system according to a projection transformation relation, thus obtaining a projection transformation matrix; calculating world system coordinates of each button according to the projection keyboard sizes and the calibration reference point world coordinate system. The method is applied to the projection keyboard automation calibration.

The invention discloses a calibration method for a light projection keyboard. The method comprises the steps that 1, image coordinate data of all keys of a reference keyboard is obtained; 2, image coordinate data of four vertex keys of a to-be-calibrated keyword is obtained; 3, affine transformation is utilized to obtain image coordinate data of other keys, except the four vertex keys, of the to-be-calibrated keyword; 4, internal parameters, distortion and external parameters of a calibration camera and image coordinates of all the keys of the to-be-calibrated light projection keyword are utilized to obtain keyboard position coordinate information of all the keys of the to-be-calibrated light projection keyword; and 5, the keyboard position coordinate information is stored to a memory to complete calibration of the light projection keyword. The calibration method for the light projection keyboard is high in speed and efficiency and suitable for batch calibration, and the problems that manual determination of the image coordinate data of all the keys of the to-be-calibrated keyword is needed for manual calibration of the light projection keyboard, operation is repeated, and the amount of labor is large are solved.

The invention discloses an intelligent door lock with a projection keyboard. The intelligent door lock comprises a door frame, a door plank, a power supply module, a communication module, an MCU and avoice module, wherein the door frame is fixedly arranged on a wall body; the door plank is rotatably connected to the inner wall of the door frame through hinges; after a person is detected by an infrared sensor, information is transmitted to the MCU, and a laser projector is turned on by the MCU to project the projection keyboard; key-pressing action track of an operator on the projection keyboard can be captured by a camera, and the information is transmitted to the MCU; and the MCU judges the information through internal programming to determine whether to open a switch between a mechanical anode lock and a cathode lock so as to open the door lock or not. The laser projection keyboard has good invisibility and leaves no fingerprints; the intelligent lock displays a digital keyboard through the laser rear projection technology only when the user is detected to be close to the door, so that the safety is high; and the whole lock looks more dazzling with good sense of science and technology, and therefore, different use experiences can be brought to the user.

The invention provides a method for realizing automatic calibration of a projection keyboard by utilizing external cameras, relates to an automatic calibration method of a projection keyboard, and isto solve the problem of waste of time and energy and the problem of large calibration errors of a conventional calibration method. The method is characterized by shooting pictures of an LED calibration plate through a jig top camera and an identification camera, and calculating an inner parameter matrix, an outer parameter matrix and distortion coefficients of the cameras; shooting a reference keyboard picture through the jig top camera; according to a reference keyboard and a projection keyboard to be calibrated, obtaining an affine transformation relationship and obtaining an image coordinate of a reference point on the keyboard to be calibrated; calculating the coordinate of the reference point of the keyboard to be calibrated in a camera coordinate system according to the inner parameter matrix of the cameras and obtaining a correction coordinate according to a camera distortion model; and then, calculating a world coordinate of the reference point of the keyboard to be calibratedand calculating corresponding key coordinates according to the world coordinate of each reference point of the keyboard to be calibrated. The method is suitable for automatic calibration of the projection keyboard.

The invention provides a method for wirelessly controlling a terminal. The method comprises the following steps: projecting a dial keyboard by a wearable device, determining key information of a user on a projection keyboard and transmitting the key information to the terminal; receiving the key information by the terminal, processing the key information and finishing a dial operation according to a processing result; and entering a wireless headset conversation state by the wearable device.

A projection keyboard for a portable communication device includes a main body having a HDMI input hole; a battery unit disposed in the main body; a connection module connected with the main body and electrically connected with the battery unit, the connection module communicating with an external portable communication device by means of a wireless or wired connection way; a micro projection device pivotally connected to a front central portion of the main body and electrically connected with the battery unit and the HDMI input hole; and a wireless AV receiver electrically connected with the battery unit and the micro projection device. The micro projection device projects the image data to a front screen or on the wall directly like a computer. The present invention has a simple structure and is small in size, without a traditional screen, so the cost is lowered greatly and can be used conveniently.

A laser imaging password keyboard comprises a projecting apparatus, a keyboard operation acquisition device, a projection keyboard position control device and a laser beam interference device, wherein the projecting apparatus is provided with a light-outgoing head and capable of generating a projection keyboard through light rays emitted by the light-outgoing head; the keyboard operation acquisition device is provided with a light-outgoing head and a light-incoming head which are mutually matched, and the keyboard operation acquisition device can read and analyze operations of a user on the projection keyboard through light rays emitted by the light-outgoing head and light rays acquired by the light-incoming head so as to obtain the operations; the projection keyboard position control device is connected with the projecting apparatus and used for generating control signals of the position and the content of the projection keyboard randomly; and the laser beam interference device is provided with a light-outgoing head and capable of interfering visible light in an area where the projection keyboard is located through light rays emitted by the light-outgoing head. The data input safety can be achieved at a low cost by the aid of the laser imaging password keyboard.

The invention relates to a PC integrated machine, comprising a device body, and a hardware part and an operating system arranged in the device body. The device body mainly comprises a startup/shutdown key, a keyboard projection module, a laser keyboard switching key, a camera containing a filter and an infrared word line laser which are arranged on the front face of a shell. A virtual keyboard can be projected by the keyboard projection module. Infrared laser emitted by the infrared word line laser is reflected by a finger which presses the virtual keyboard. The camera containing the filter captures an image of the finger which reflects the infrared laser, thereby realizing a character input function of a general keyboard. A USB interface and a projection lens capable of projecting a projection screen are arranged on the back of the shell. All functions of a personal computer are realized by the projection keyboard, the projection screen and the PC integrated machine. The PC integrated machine can be interconnected with a WiFi through a smart phone and can be used as an externally connected large-size input and output device of the smart phone. The PC integrated machine can be widely applied to the field of the personal computer.

The invention discloses a device for calibrating a light projection keyboard and a use method thereof. The device for calibrating the light projection keyboard comprises a box body, a calibrating camera, a fixing device, a camera parameter calibrating plate and a camera data acquisition and information calculation device, wherein the internal part of the box body is hollow; the calibrating camera is arranged in the box body and positioned at the top of the box body; the fixing device is used for fixing a to-be-calibrated light projection keyboard at the bottom of the box body; a plurality of infrared LED lamps are arranged on the camera parameter calibrating plate; the camera data acquisition and information calculation device is used for acquiring a laser projection image of the light projection keyboard, calculating the keyboard position information according to the acquired image and transmitting the keyboard position information to the to-be-calibrated light projection keyboard device. The device for calibrating the light projection keyboard solves the problems that the operation of calibrating the light projection keyboard manually needs to manually determine the image coordinate data of all the keys of the to-be-calibrated keyboard, the operation is repeated, the labor amount is large, and the light projection keyboards cannot be calibrated in batches.

An optical projection keyboard and mouse includes an optical projection hardware module for generating an optical projection keyboard zone and an optical projection mouse zone; an optical projection keyboard zone for achieving the functions of the keyboard; an optical projection mouse zone for achieving the functions of the mouse. The design scheme set forth is characterized by easy carrying, long service life, independent operation and capability of being embedded into other devices.

The invention discloses a laser projection input scheme embedded into mobile terminal equipment, the mobile terminal equipment is provided with a laser transmitter and an infrared laser, and the lasertransmitter projects a virtual keyboard to a desktop;wherein the infrared laser emits infrared rays for detecting laser, and the infrared laser receives a signal that the infrared rays are intercepted and triggers an interruption program in the infrared laser; starting a camera for snapshot; Processing the image captured by the camera; obtaining a key position where a finger is parked on the virtual keyboard on the plane image, obtaining an offset position, and calculating coordinate values of x and y corresponding to the finger on the desktop according to a triangular distance measurement method; The method comprises the following steps: finding a key position corresponding to a virtual keyboard, packaging the key position into a system universal input event data packet, sending the system universal input event data packet to an application layer for use, ending identification, modifying a projection keyboard, and directly embedding the projection keyboard into mobile terminal equipment to meet the portability requirement of the mobile terminal equipment.

The invention relates to a multifunctional laser virtual keyboard, which comprises a laser keyboard projection module, an infrared line laser, a camera sensor, a microprocessor and an upper computer,wherein the laser keyboard projection module is used for generating the pattern of the keyboard on one plane; the infrared line laser generates line laser parallel with the plane for indicating the key position of the finger; the camera sensor is used for collecting the key position image of the finger and feeds image information back to a microprocessor; the microprocessor transmits the image information to the upper computer; the upper computer receives the image information and carries out image processing; and through a mapping relationship between the key position of the pattern of the projection keyboard and the keyboard key position collected by the camera sensor, a key detection function, a touch screen function and a scrawling and drawing function can be finished.

The invention discloses a pedestal pan with a laser keyboard control structure. The pedestal pan includes a laser keyboard module, a control module and a power module; the laser keyboard module includes a projector and a recognition sensor, the projector is used for projection, after a virtual key image is formed, the recognition sensor reads press information on the surface of a virtual key and feeds the information back to the control module, the control module receives the press information fed back by the recognition sensor, and according to the press information, the power module controlscorresponding mechanism action of the pedestal pan, and the power module includes at least one of an upper cover mechanism, a seat mechanism and a flushing mechanism of the pedestal pan. The invention provides the pedestal pan with the laser keyboard control structure, so that the operation mode of the pedestal pan is more reliable and hygienic, at the same time, the pedestal is convenient and efficient to use, and the application range of the intelligent pedestal pan is greatly extended.

The invention provides an operation method of a projection keyboard of an intelligent terminal. The operation method comprises the following steps that the projection keyboard is in communication connection with an intelligent wearable device; the projection keyboard projects a keyboard image at a target position, and an infrared horizontal optical network is horizontally projected at the positionof the keyboard image; when a first human body finger falls into a first letter range, the projection keyboard captures a reflected light spot image of the first human body finger to infrared horizontal light; the position information of the first human body finger is acquired and mapped to a keyboard layout; the intelligent wearable device captures a knocking action of the first human body finger, and a key instruction is fed back to the projection keyboard; the key instruction is received by the projection keyboard, a keyboard key event is generated, and an electric signal is fed back to the intelligent wearable device; the intelligent wearable device receives the electric signal and feeds back rebound stimulation to the first human body finger. According to the method, the intelligentwearable device is used for further monitoring the knocking action of the human body finger, and the effectiveness of information input is ensured.

The invention discloses a self-starting laser keyboard controlled toilet bowl. The self-starting laser keyboard controlled toilet bowl comprises a laser keyboard module, a control module, a power module and a distance measuring module; the laser keyboard module comprises a projector and an identification sensor, after the projector projects to form a virtual key image, the identification sensor reads press information of the surface of a virtual key and feeds the information back to the control module, and corresponding mechanisms of the toilet bowl are controlled to act by controlling the power module; the distance measuring module detects the distance between a human body and the toilet bowl and feeds the distance back to the control module, the projector of a laser keyboard is started after the distance measuring module determines that the human body is close to the toilet bowl and turned off after the distance measuring module determines that the human body leaves the toilet bowl.According to the self-starting laser keyboard controlled toilet bowl, the operation mode of the toilet bowl is more reliable and sanitary, convenient and rapid, and the application scenarios of the intelligent toilet bowl are greatly expanded.

The invention discloses a vehicle inspection device based on an ultrasonic flaw detector, comprising a conveyor belt 1, a conveyor belt pulley 2, an auxiliary hydraulic cylinder 3, a lifting hydraulic cylinder 4, a steel plate 5, a flexible pad 6, a translation door 7, and a translation door handle 8. Housing 9, acoustic wave detector 10, guide rail 11, host 12, display 13, projection keyboard 14, mouse 15, base 16, column 17, operation buttons 18, display panel 19 and other components, the conveyor belt 1 and the conveyor The belt pulley 2 is two, and a conveyor belt 1 is installed on the conveyor belt pulley 2, and the conveyor belt 1 extends into the vehicle inspection device surrounded by the housing 9, and a conveyor belt 1 is arranged between the two conveyor belts 1 in the vehicle inspection device. There is a vehicle lifting mechanism, and the vehicle lifting mechanism includes an auxiliary hydraulic cylinder 3 , a lifting hydraulic cylinder 4 , a steel plate 5 and a flexible pad 6 . Through the method of sound wave detection, the computer is used to analyze the damage status of the inspected car. Compared with manual inspection, this detection method is faster and more accurate, and will not leave any dead ends for inspection.

The embodiment of the invention relates to a door lock control method and device, electronic equipment and a storage medium. The method comprises the steps that under the condition that password input triggering operation for a door lock is detected, an unlocking password which is input through a target laser keyboard and aims at the door lock is obtained, the door lock is in communication connection with the target laser keyboard, display positions of characters corresponding to keys in the target laser keyboard change randomly, and the unlocking password comprises at least one character; whether the unlocking password is matched with a preset password of the door lock or not is determined; and if the unlocking password is matched with the preset password, the door lock is controlled to be opened. According to the method, the unlocking password of the door lock can be input through the laser keyboard of which the presentation positions of the characters change randomly, so that the safety of the door lock is improved.