The invention relates to a driver of a semiconductor laser. The driver comprises a driving module, a current monitoring module and a controller; the driving module is connected with the semiconductorlaser, and provides a driving current for the semiconductor laser; the current monitoring module monitors the driving current and outputs a value of the driving current in real time; and the controller is connected with the current monitoring module, determines whether the driving current satisfies requirements according to the value of the driving current, and controls the working state of the semiconductor laser according to a determination result. Via the driver, it is ensured that the semiconductor laser always work under the condition that the driving current satisfies the requirements, and the condition that the semiconductor laser works when the driving current does not satisfy the requirement is avoided. Thus, the semiconductor laser always works in the stable driving current, andis prevented from damage caused by instable driving current, and the semiconductor laser is protected effectively.

Driver of semiconductor laser

The invention discloses a lip color adjustment method and device. The method comprises: face identification is carried out on an original image; when the original image includes a face region, a lip region is localized in the face region and average lip color data are obtained based on the lip region; and according to the average lip color data and color temperature data of the original image, a pixel point of the lip region is processed. According to the invention, the color temperature data that can reflect the shooting environment and the lip color data of the original image are considered,so that individualized lip color beautification is carried out with the environment based on characteristics of the lip color of the user and thus the demand of the beautification effect of the lip color of the user is met.

Lip color adjustment method and device

The invention discloses a semiconductor laser digital temperature control system free of low-frequency noise. The semiconductor laser digital temperature control system free of low-frequency noise comprises a sine signal source circuit, a thermistor-bridge circuit, a differential amplification circuit, a mixer, an active lowpass filtering circuit, an A/D convertor, a central processing unit and a gain switch, and further comprises a D/A converter and a TEC drive circuit module, and the central processing unit is connected with a serial communication circuit. According to the semiconductor laser digital temperature control system, an alternative current signal serves as a reference source, interference of the low-frequency noise in a direct current signal can be greatly reduced, the temperature of a laser can be controlled more effectively, and long-term drifting of the laser temperature is lowered. The thermistor-bridge circuit is used for carrying out inputting, a stable reference signal is produced, and an error signal can be acquired more effectively; by control of the central processing unit over the gain switch, the gain coefficient of the error signal is precisely and automatically controlled, and therefore the differential amplifier is effectively protected while the temperature is precisely controlled, and the service life of the differential amplifier is prolonged.

Semiconductor laser digital temperature control system free of low-frequency noise

The invention discloses a method for achieving a semiconductor cooler control loop based on software. A control circuit part in a semiconductor refrigeration control loop is digitalized through the software, and debugging, testing and problem positioning on a light receiving and transmitting module are facilitated. An analog control circuit in the technical scheme in the prior art is omitted, the layout area of the circuit board is reduced, the packaging of the light receiving and transmitting module becomes smaller and smaller, the material cost of the light receiving and transmitting module is reduced, a circuit structure and a software scheme through which the circuit board space can be saved and the cost can be reduced can be provided for the light receiving and transmitting module, and the method is worthy of being greatly popularized.

Method for achieving semiconductor cooler control loop based on software

The invention discloses an image saturation degree adjustment method. The method comprises the following steps of: converting a to-be-processed image from an RGB space to a YUV space so as to obtain afirst image; obtaining a lightness value of each pixel point in the first image; determining a target pixel point from the first image according to the lightness values and a preset lightness threshold value; obtaining a target saturation degree corresponding to the target pixel point and an illuminance corresponding to the first image; and when the illuminance is smaller than a preset illumination threshold value, adjusting the target saturation degree according to the illuminance and a preset saturation degree adjustment rule so as to obtain a second image. The invention furthermore discloses a terminal and a computer readable storage medium. Through implementing above scheme, the image display effect is improved.

Image saturation degree adjustment method, terminal and storage medium

The invention discloses a laser display color adjusting method, which comprises steps: raw data signals in a RGB format of one frame of laser image are acquired; the format of the raw data signals is converted to generate data signals in an L*C*h format; a tone corresponding to a tone range with concentrated pixel points is recorded to be a main tone of the laser image and a main tone influence function is set; a saturation influence function is set, the main tone influence function is introduced at the same time if the main tone exists in the laser image, and saturation mapping is carried out on all pixel points in the data signals; a tone weight function is set to carry out tone mapping on all pixel points in the data signals; a light illumination mapping function is set to carry out light illumination mapping on all pixel points; and the format of the data signals is converted to the RGB format and display is carried out. By adopting different tone, saturation and light illumination mapping relationships, ill questions of over saturation, over illumination, easy visual fatigue and the like can be solved. The invention also discloses a laser display color adjusting device.

Laser display color adjusting method and device thereof

The utility model discloses a semiconductor laser temperature control system comprising a temperature detector, a temperature control device and a temperature adjuster. The temperature detector is arranged at the semiconductor laser. The temperature control device is connected with the temperature detector. The temperature adjuster is arranged at the semiconductor laser and connected with the temperature control device. The semiconductor laser temperature control system of the utility model is a temperature control system having advantages of fast response speed, high accuracy, good temperature control effect and simple structure.

Semiconductor laser temperature control system

The invention discloses a high-power semiconductor laser driving system. The driving system comprises a central processing module used for generating a digital control signal, a driving current setting module used for generating an analog control signal according to the digital control signal, a laser display driving module used for generating driving current according to the analog control signal, a high-power semiconductor laser used for performing laser display according to the driving current, a driving current detection module used for collecting the driving current, converting the driving current into a digital signal and transmitting the digital signal to the central processing module, and a power supply module connected with the central processing module, the driving current setting module, the laser display driving module and the driving current detection module and used for providing power needed for working. The high-power semiconductor laser driving system of the invention can accurately and quickly control the magnitude of the output driving current and ensure safe and stable operation of a laser. The invention further discloses a high-power semiconductor laser driving method.

Wang Guodong

Papers

Laser display color adjusting method and device thereof

Semiconductor laser temperature control system

High-power semiconductor laser driving system and driving method thereof