WO2019210697A1

WO2019210697A1 - Smart policing terminal helmet

Info

Publication number: WO2019210697A1
Application number: PCT/CN2018/123198
Authority: WO
Inventors: 李风波; 王昇; 蔡隽; 杜超; 李睿琴; 李睿智
Original assignee: 上海钜星科技有限公司
Priority date: 2018-05-02
Filing date: 2018-12-24
Publication date: 2019-11-07
Also published as: CN108497603A; CN108497603B

Abstract

A smart policing terminal helmet, comprising a helmet body (1), a microprocessor module (2), a power supply module (3), a panoramic camera module (6), a glasses display optical module, an earphone module (9), a microphone array module (11) and a peripheral communication module (12), wherein the microprocessor module (2), the power supply module (3), the panoramic camera module (6) and the microphone array module (11) are disposed on the helmet body (1); the glasses display optical module is disposed at a position at the front of the helmet body (1) and in front of the eyes of a wearer; the earphone module (9) is disposed at the position of the cheekbone on a side face of the helmet body (1) and in front of the ears of the wearer; and the peripheral communication module (12) is disposed at a position near the helmet body (1). The smart policing terminal helmet can simultaneously achieve the functions of scene localization, high-definition photographing during high-speed movement, performing monitoring and providing an early warning regarding the safety of the environment surrounding the police officer, obtaining panoramic scene evidence, sound localization, real-time translation, background data acquisition, and diversified communication between police officers and diversified instruction transmission from a command center.

Description

Police terminal smart helmet

Technical field

The invention relates to a smart helmet, in particular to a smart helmet for a police terminal.

Background technique

The police in the current society, in the course of their duties, need to operate different equipment according to the site environment and conditions for on-site monitoring, communication between police officers and communication between police officers and the background command center. In the case of more complicated situations, it is also necessary to carry out on-site positioning, high-speed mobile high-definition camera photographing, police environment security monitoring and warning, on-site panoramic forensics, sound localization, real-time translation, background data retrieval, and police officer diversification. Diversified instructions from the communications and command centers are communicated. The existing police helmet has a single function and low duty support capability, which cannot meet the increasingly complex and diverse duty requirements of the duty police.

Summary of the invention

The invention provides a smart helmet of a police terminal, which can simultaneously realize on-site positioning, high-speed mobile high-definition camera photographing, police environment security monitoring and early warning, on-site panoramic forensics, sound localization, real-time translation, background data retrieval, and police Diversified communications between the members and the command center's diverse directives convey these functions.

Included in helmet body, microprocessor module, power module, panoramic camera module, glasses display optical module, headset module, microphone array module and peripheral communication module; microprocessor module, power module, panoramic camera module and microphone array module settings On the helmet body; the glasses display optical module is disposed in front of the wearer's eyes in front of the helmet body, the headset module is disposed at the position of the shin bone in front of the wearer's ear on the side of the helmet body; the peripheral transmission module is disposed in the vicinity of the helmet body; the power module Providing power for the microprocessor module, the panoramic camera module, the glasses display optical module, the headset module and the microphone array module; the microprocessor module comprises a microprocessor, a WIFI communication module and a positioning device; the glasses display optical module comprises a lens display optical module And high-frame camera module; peripheral communication module includes peripheral WIFI communication module and 4G communication module; microprocessor and WIFI communication module, panoramic camera module, positioning device, lens display optical module, high frame degree Camera module, headset module, microphone The signals are transmitted between the column modules; the microprocessor receives information from the positioning device, the panoramic camera module, the high-frame camera module, and the microphone array module; the microprocessor controls the operation of the panoramic camera module and the high-frame camera module; The processor processes the information, and the microprocessor has a language translation function; the WIFI communication module and the peripheral WIFI communication module communicate information through WIFI, and the 4G communication module and the background command center communicate information through 4G, and the 4G communication module And with other police terminal smart helmets through 4G for information communication; the positioning device includes GPS device and altitude electronic device, the GPS device obtains the current position information of the smart terminal of the police terminal, and the altitude electronic device obtains the current altitude of the smart helmet of the police terminal Information; the panoramic camera module acquires panoramic video and photo information; the high-frame camera module acquires high-frame video and photo information; the lens display optical module displays image information transmitted by the microprocessor; the headset module plays the microprocessor Conveyed sound information; microphone array module acquires police information The ambient sound information around the smart helmet of the terminal is subjected to noise reduction processing of the obtained sound information, and the sound source position information is obtained through analysis and calculation.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: the microprocessor module further includes a nine-axis gyroscope module; the glasses display optical module further includes a depth camera module and a wearer microphone; The gyroscope module, the depth camera module, and the wearer's microphone both transmit signals to and from the microprocessor; the microprocessor receives information from the nine-axis gyroscope module, the depth camera module, and the wearer's microphone, and after processing Generating a control signal; the nine-axis gyroscope module senses the head rotation and movement information of the helmet wearer; the depth camera module identifies the wearer's gesture and motion information, and the depth camera module obtains between the depth camera module and the designated object Distance information; the wearer's microphone receives the wearer's voice information.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: the panoramic camera module includes a panoramic lens module, an automatic lifting mechanism and an automatic shielding mechanism, and the panoramic lens module obtains panoramic video and photo information, and automatically lifts and lowers The mechanism adjusts the panoramic lens module to lift and lower, and the automatic shielding mechanism shields the panoramic lens module.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: the microprocessor module further includes a Bluetooth module, and the signal is transmitted between the microprocessor and the Bluetooth module, and the microprocessor passes through the Bluetooth module. Peripheral Bluetooth devices for information communication.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: the lens display optical module is an optical waveguide holographic image display, and the display brightness of the lens display optical module is adjustable; the glasses display optical module further includes a light sensitive The sensor, the photosensitive sensor senses ambient brightness information and transmits the signal to the microprocessor; the microprocessor generates a control signal according to the ambient brightness information to control the display brightness of the lens display optical module.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: further comprising a power-discoloring shading module disposed on the front of the helmet body and blocking between the optical module of the glasses and the surrounding environment. The power-changing color shading module adjusts the light transmittance by using the color change; the glasses display optical module further includes a light-sensitive sensor, the light-sensitive sensor senses the ambient brightness information and transmits the signal to the microprocessor; the signal is transmitted between the microprocessor and the power-changing color shading module, and the micro-processing The device generates a control signal according to the ambient brightness information to control the transmittance of the energized color shading module.

Further, the present invention provides a smart terminal for a police terminal, which may further include a ventilation heat dissipation module, a ventilation heat dissipation module disposed on the helmet body, and a ventilation heat dissipation module including a ventilation micro motor, a ventilation fan, and a ventilation air passage; The ventilation micro motor drives the ventilation fan, and the inlet of the ventilation fan communicates with the surrounding environment. The ventilation air passage connects the outlet of the ventilation fan with other modules, and the ventilation and heat dissipation module cools and cools other modules; the microprocessor module further includes a temperature sensor. The temperature sensor senses the temperature information of the microprocessor module and transmits the signal to the microprocessor; the microprocessor transmits a signal to the ventilation module, and the microprocessor generates a control signal according to the temperature information of the microprocessor module to control the ventilation micro motor. Start and stop and power.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: an automatic lifting module, an automatic lifting module disposed on the helmet body, an automatic lifting module connected to the power color changing sunshade module, and an automatic lifting module and connection The microprocessor and the automatic lifting module transmit signals, and the microprocessor controls the automatic lifting module to drive the power-changing sunshade module and the glasses to display the optical module to lift.

Further, the present invention provides a smart terminal for a police terminal, which may further have the following features: the headset module includes two bone conduction oscillators and a bone conduction headset micro drive PCB; two bone conduction oscillators are respectively disposed on both sides of the helmet body, bone The conductive headset micro-drive PCB is placed in the helmet body, and the bone conduction headset micro-drive PCB converts the received audio output signal into vibrations of the two bone-conducting vibrators so that the helmet wearer can hear it.

Further, the present invention provides a smart terminal for a police terminal, which may further have a feature that further includes a solar charging module, the solar charging module is disposed on the helmet body, and the solar charging module includes a solar panel, and the solar panel is in the case of sunshine. Charge the battery module.

The invention provides a smart helmet for a police terminal, which realizes on-site positioning, high-speed moving high-definition camera photographing, police environment security monitoring and early warning, on-site panoramic forensics, sound localization, real-time translation, and background data retrieval by setting various modules. The diversified communication between the police officers and the command center's diversified commands convey these functions; by setting the nine-axis gyroscope module, the camera module and the wearer's microphone, the helmet's functions can be moved through the wearer's head, Gesture change and voice operation; by setting the automatic lifting mechanism and automatic shielding mechanism in the panoramic camera module, the panoramic camera module can adapt to more situations; by setting the Bluetooth module, the helmet and peripheral Bluetooth devices can communicate information. The helmet is adapted to the change of ambient brightness by setting the photosensitive sensor, setting the optical waveguide holographic image display and adjusting the brightness of the lens display optical module and setting the power-changing shading module; by setting the ventilation heat-dissipating module, the temperature sensor, and the helmet Various modules, especially microprocessor modules It will not be damaged by high temperature; by setting the automatic lifting module to adjust the lifting and lowering of the glasses display optical module and the power-changing color shading module, the helmet can be used by different wearers; by setting two bone conduction vibrators and bone conduction headset micro drive PCB As a headset module, the wearer can also hear the sound of the external environment.

DRAWINGS

1 is a schematic structural view of a smart helmet of a police terminal.

FIG. 2 is a schematic diagram of a function realization process of a smart helmet of a police terminal.

Reference numerals: helmet body 1, microprocessor module 2, power module 3, solar charging module 4, ventilation and heat dissipation module 5, panoramic camera module 6, automatic lifting module 7, optical waveguide glasses module 8, bone conduction headset module 9, The power-changing shading module 10, the microphone array module 11, and the peripheral communication module 12.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

As shown in FIG. 1 , a smart terminal for a police terminal includes a helmet body 1, a microprocessor module 2, a power module 3, a solar charging module 4, a ventilation and cooling module 5, a panoramic camera module 6, an automatic lifting module 7, and a light. The waveguide glasses module 8, the bone conduction headset module 9, the power color changing sunshade module 10, the microphone array module 11 and the peripheral communication module 12.

Microprocessor module 2, power module 3, solar charging module 4, ventilation and cooling module 5, panoramic camera module 6, automatic lifting module 7, optical waveguide glasses module 8, bone conduction headset module 9, power color changing sunshade module 10 and microphone array The module 11 is disposed on the helmet body 1, and the peripheral communication module 12 is disposed at a position near the helmet body 1.

The microprocessor module 2 is located at the rear of the helmet wearer's brain. The power module 3 is located above the microprocessor module 2, and the power module 3 supplies power to other modules. The solar charging module 4 is located above the power module 3, and the solar charging module 4 includes a solar panel that charges the battery module 3 in the presence of sunlight. The ventilation and heat dissipation module 5 performs air-cooling and heat dissipation on other modules, including a ventilation micro motor, a ventilation fan and a ventilation duct, the micro motor and the ventilation fan are located above the solar charging module 4, the ventilation micro motor drives the ventilation fan, and the inlet and the surrounding of the ventilation fan The environment is connected, and the ventilation duct connects the outlet of the ventilation fan with other modules. The panoramic camera module 6 is located at the top of the helmet body 1. The panoramic camera module 6 includes a panoramic lens module, an automatic lifting mechanism and an automatic shielding mechanism, the panoramic lens module performs panoramic imaging and photographing, and the automatic lifting mechanism adjusts the panoramic lens module lifting and automatically. The shielding mechanism shields the panoramic lens module. The optical waveguide glasses module 8 and the power-changing shading module 10 are located in front of the eyes of the helmet wearer, and the side of the power-distributing shading module 10 is shielded between the optical waveguide glasses module 8 and the external environment, and the power-discoloring shading module 10 adjusts the light transmittance by using discoloration. The automatic lifting module 7 is located above the optical waveguide glasses module 8 and the power-changing shading module 10. The automatic lifting module 7 is connected with the optical waveguide glasses module 8 and the power-changing shading module 10. The automatic lifting module 7 adjusts the optical waveguide glasses module 8 and the power-changing shading module. The position of the module 10 is raised and lowered. The microphone array module 11 is located above the optical waveguide glasses module 8 and the power-changing shading module 10, near the outer side of the helmet body 1. The bone conduction headset module 9 includes two bone conduction transducers and a bone conduction headset micro drive PCB. The two bone conduction oscillators are respectively located at the tibia position in front of the wearer's ears. The bone conduction headset micro drive PCB is located in the helmet body 1 and the bone. The conductive headset micro-drive PCB converts the received audio output signal into vibrations of two bone-conducting vibrators so that the helmet wearer can hear it.

As shown in FIG. 2, the micro processing module 2 includes a microprocessor, a WIFI communication module, a Bluetooth module, a nine-axis gyroscope module, a positioning device, and a temperature sensor.

The optical waveguide glasses module 8 includes an optical waveguide glasses module, a high-frame camera module, a depth camera module, a wearer microphone, and a light sensor.

The peripheral communication module 12 includes a peripheral WIFI communication module and a 4G communication module.

Microprocessor and WIFI communication module, Bluetooth module, nine-axis gyroscope module, positioning device, temperature sensor, optical waveguide glasses module, high-frame camera module, depth camera module, wearer microphone, photosensitive sensor The ventilation heat dissipation module 5, the panoramic camera module 6, the automatic lifting module 7, the bone conduction headset module 9, the power color changing sunshade module 10 and the microphone array module 11 transmit signals.

The microprocessor processes the information, the microprocessor controls other modules and modules that need to be controlled, and the microprocessor has a language translation function.

The WIFI communication module of the microprocessor and the peripheral WIFI communication module of the peripheral communication module 12 perform WIFI information communication, and the 4G communication module of the peripheral communication module 12 and the background command center perform 4G information communication. The 4G communication module of the peripheral communication module 12 performs 4G information communication with other such helmets. Thereby the information communication between the helmet and the background command center and other such helmets is realized.

The Bluetooth module communicates with the peripheral Bluetooth device using Bluetooth, and the microprocessor communicates with the peripheral Bluetooth device through the Bluetooth module.

The nine-axis gyroscope module senses the head rotation and movement information of the helmet wearer and signals it to the microprocessor. Based on the above information, the microprocessor generates control signals to control the modules and modules that need to be controlled.

The positioning device comprises a GPS device and an altitude electronic device. The GPS device acquires the current position information of the helmet, and the altitude electronic device acquires the current altitude information of the helmet and transmits the signal to the microprocessor.

The temperature sensor senses the temperature information of the microprocessor module 2 and signals it to the microprocessor. Based on the above information, the microprocessor generates a control signal to control the start and stop and power of the ventilation micromotor to adjust the heat dissipation effect.

The optical waveguide glasses module is an optical waveguide holographic image display. The display brightness of the optical waveguide glasses module can be adjusted. The microprocessor transmits the image information that needs to be displayed to the optical waveguide glasses module through the image output signal. The optical waveguide glasses module receives the image output signal and displays it as image information.

The high-frame camera module can move high-definition camera and photo at speeds of up to 80 km/h, and the high-frame camera module signals the captured camera and photo information to the microprocessor. The microprocessor processes the above information and transmits it to the background command center for storage and processing. The high-frame camera module controls the shooting by a control signal generated by the microprocessor.

The depth camera module identifies the wearer's gestures and motion information and signals them to the microprocessor. Based on the above information, the microprocessor generates control signals to control the modules and modules that need to be controlled. The depth camera module can also obtain the distance information between the depth camera module and the specified object, and send the signal to the microprocessor.

The wearer's microphone receives the wearer's voice message and signals it to the microprocessor. Based on the above information, the microprocessor generates control signals to control the modules and modules that need to be controlled.

The photosensor senses ambient brightness information and signals it to the microprocessor. Based on the above information, the microprocessor generates a control signal to control the degree of light transmission of the energization color changing module 5. At the same time, the microprocessor generates a control signal to control the display brightness of the optical waveguide glasses module according to the above information.

The microprocessor transmits the sound information to be played back to the bone conduction headset module 9 through the sound output signal. The bone conduction headset module 9 receives the above sound output signal and plays it as sound information.

The panoramic camera module 6 signals the captured video and photo information to the microprocessor. The microprocessor processes the above information and transmits it to the background command center for storage and processing. The microprocessor-generated control signals of the panoramic camera module 6 control shooting, lifting and masking protection.

The microphone array module 11 receives ambient sound information around the helmet, and performs noise reduction processing on the obtained sound information, and obtains sound source position information through analysis and calculation. The above sound information and sound source position information are signaled to the microprocessor. The microprocessor processes the above information and transmits it to the background command center for storage and processing.

The automatic lifting module 7 controls the lifting and lowering by a control signal generated by the microprocessor.

Advantages of the embodiment:

The helmet contains a WIFI communication module and a peripheral communication module that allows the helmet to communicate with the background command center or communicate between the helmets. Through information communication with the background command center and other such helmets, and the obtained image information is displayed through the optical waveguide glasses module 8, the obtained sound information is played through the bone conduction headset module 9, thereby realizing background data acquisition and display and command. The center's diversified command communication, and diversified communication between police officers.

The helmet is provided with a positioning device that enables the position and altitude information of the helmet to be acquired.

The helmet is provided with a high frame number camera module, which enables the helmet to take high-definition camera photos during high-speed movement, and recognizes information such as license plates and faces in the image, and sends the monitoring content to the background command center for storage.

The helmet is provided with a panoramic camera module 6 capable of automatically lifting and automatically shielding, enabling panoramic camera and photographing in the panoramic camera, and transmitting the captured information to the microprocessor, which is processed by the microprocessor and sent to the background command center. Thereby, the panoramic monitoring and warning around the police officers can be worn and the on-site panoramic forensics function can be provided for the background command center.

The helmet is provided with a microphone array module 11 capable of receiving environmental sounds around the helmet, and performing noise reduction processing and analysis calculation to distinguish the sound source position, and the microphone array module 11 transmits sound information to the microprocessor for identification and passing through the microprocessor. The translation function performs language translation to achieve sound source localization and real-time translation.

The helmet features a nine-axis gyroscope module, a depth camera module, and a wearer's microphone, allowing the helmet to function through the wearer's head movements, gesture changes, and voice.

According to the above, the helmet can simultaneously realize on-site positioning, high-speed moving high-definition camera photographing, police environment security monitoring and early warning, on-site panoramic forensics, sound localization, real-time translation, background data retrieval, and diverse communication between police officers and The command center's diverse commands convey these functions.

Claims

A smart terminal for a police terminal, characterized in that:

The utility model comprises a helmet body, a microprocessor module, a power module, a panoramic camera module, a glasses display optical module, a headset module, a microphone array module and a peripheral communication module;

The microprocessor module, the power module, the panoramic camera module, and the microphone array module are disposed on the helmet body;

The glasses display optical module is disposed at a front position of the front of the wearer's eyes of the helmet body, and the headset module is disposed at a position of the tibia in front of the wearer's ear on the side of the helmet body;

The peripheral communication module is disposed at a position near the helmet body;

The power module supplies power to the microprocessor module, the panoramic camera module, the glasses display optical module, the headset module, and the microphone array module;

The microprocessor module includes a microprocessor, a WIFI communication module, and a positioning device;

The glasses display optical module includes a lens display optical module and a high frame camera module;

The peripheral transmission module includes a peripheral WIFI communication module and a 4G communication module;

The microprocessor and the WIFI communication module, the panoramic camera module, the positioning device, the lens display optical module, the high-frame camera module, the headset module, and the microphone array Signal transmission between modules;

The microprocessor receives information from the positioning device, the panoramic camera module, the high-frame camera module, and the microphone array module;

The microprocessor controls operation of the panoramic camera module and the high-frame camera module;

The microprocessor processes information, the microprocessor having a language translation function;

The WIFI communication module communicates with the peripheral WIFI communication module through WIFI, and the 4G communication module communicates with the background command center through 4G, and the 4G communication module and other said police services The terminal smart helmet communicates information through 4G;

The positioning device includes a GPS device and an altitude electronic device, the GPS device acquires current location information of the smart helmet of the police terminal, and the altitude electronic device acquires current altitude information of the smart helmet of the police terminal;

The panoramic camera module acquires panoramic video and photo information;

The high-frame camera module acquires high-frame video and photo information;

The lens display optical module displays image information conveyed by the microprocessor;

The headset module plays sound information sent by the microprocessor;

The microphone array module acquires ambient sound information around the smart helmet of the police terminal, performs noise reduction processing on the obtained sound information, and obtains sound source position information through analysis and calculation.
A smart terminal smart helmet according to claim 1, wherein:

The microprocessor module further includes a nine-axis gyroscope module;

The glasses display optical module further includes a depth camera module and a wearer microphone;

Transmitting signals between the nine-axis gyroscope module, the depth camera module, and the wearer microphone and the microprocessor;

The microprocessor receives information of the nine-axis gyroscope module, the depth camera module, and the wearer's microphone, and generates a control signal after processing;

The nine-axis gyroscope module senses head rotation and movement information of the helmet wearer;

The depth camera module identifies gestures and motion information of the wearer, and the depth camera module obtains distance information between the depth camera module and the designated object;

The wearer microphone receives wearer voice information.
A smart terminal smart helmet according to claim 1, wherein:

The panoramic camera module includes a panoramic lens module, an automatic lifting mechanism and an automatic shielding mechanism, the panoramic lens module obtains panoramic video and photo information, and the automatic lifting mechanism adjusts the panoramic lens module lifting, the automatic shielding The mechanism shields the panoramic lens module.
A smart terminal smart helmet according to claim 1, wherein:

The microprocessor module further includes a Bluetooth module, and the microprocessor transmits a signal to the Bluetooth module, and the microprocessor communicates with the peripheral Bluetooth device through the Bluetooth module.
A smart terminal smart helmet according to claim 1, wherein:

The lens display optical module is an optical waveguide holographic image display, and the display brightness of the lens display optical module is adjustable;

Also included is a photosensor that senses ambient brightness information and signals to the microprocessor;

The microprocessor generates a control signal according to the ambient brightness information to control the display brightness of the lens display optical module.
A smart terminal smart helmet according to claim 1, wherein:

The device further includes an energized color changing sunshade module, the power color changing sunshade module is disposed at a front portion of the helmet body and is shielded between the glasses display optical module and the surrounding environment, and the power color changing sunshade module adjusts light transmittance by using color change;

The glasses display optical module further includes a light sensor that senses ambient brightness information and transmits the signal to the microprocessor;

The microprocessor transmits a signal between the power-on color-changing shading module, and the microprocessor generates a control signal according to the ambient brightness information to control the light transmittance of the power-changing shading module.
A smart terminal smart helmet according to claim 1, wherein:

And a ventilation and heat dissipation module, the ventilation and heat dissipation module is disposed on the helmet body, and the ventilation and heat dissipation module comprises a ventilation micro motor, a ventilation fan and a ventilation air duct;

The ventilation micro-motor drives the ventilation fan, the inlet of the ventilation fan is in communication with the surrounding environment, the ventilation air passage connects the outlet of the ventilation fan and other modules, and the ventilation and heat dissipation module performs wind on other modules. Cold heat dissipation

A temperature sensor is also included, the temperature sensor sensing temperature information of the microprocessor module and transmitting the signal to the microprocessor;

A signal is transmitted between the microprocessor and the ventilation and heat dissipation module, and the microprocessor generates a control signal to control start and stop and power of the ventilation micromotor according to temperature information of the microprocessor module.
A police terminal smart helmet according to claim 6, wherein:

The automatic lifting module is further disposed on the helmet body, the automatic lifting module is connected to the power-changing color shading module, and the automatic lifting module is connected to the glasses display optical module;

A signal is transmitted between the microprocessor and the automatic lifting module, and the microprocessor controls the automatic lifting module to drive the power-changing shading module and the glasses display optical module to move up and down.
A smart terminal smart helmet according to claim 1, wherein:

The headset module includes two bone conduction oscillators and a bone conduction headset micro drive PCB;

Two bone conduction vibrators are respectively disposed on two sides of the helmet body, and the bone conduction headset micro drive PCB is disposed in the helmet body, and the bone conduction headset micro drive PCB converts the received audio output signal into The two bones transmit vibrations of the vibrator so that the helmet wearer can hear it.
A smart terminal smart helmet according to claim 1, wherein:

Also included is a solar charging module disposed on the helmet body, the solar charging module including a solar panel that charges the battery module in the presence of sunlight.