Abstract: A MINI LED driving power supply and a MINI LED television, the MINI LED driving power supply includes a power supply board connecting with a mainboard and a MINI LED screen, the power supply board includes a first conversion module and a second conversion module; the first conversion module outputs power supply voltage to power the mainboard after the first conversion module is turned on, outputs first voltage and second voltage to power the mainboard according to a power-on/off signal output by the mainboard, and outputs first power supply and high-voltage direct current to the second conversion module; the second conversion module converts high-voltage direct current into third voltage and outputs the third voltage to the MINI LED screen according to enable signal output by the mainboard and the first power supply, to light up MINI LED screen.

Abstract: Embodiment of the present application discloses a spliced display device and a spliced display screen, wherein a groove is formed at a splicing area between adjacent ones of liquid crystal display panels, an LED light-emitting unit is disposed in the groove. Such an arrangement can not only eliminate splicing seams, but also prevent a side of the light-emitting diode light bar from being seen at a side viewing angle, and will not produce black stripes, thereby greatly improving user's experience.

Abstract: A collision data processing method includes: determining, based on a physical engine detecting that a first rigid body having a first physical attribute collides with a second rigid body having a second physical attribute, an initial cutting model from a first model corresponding to the first rigid body and a second model corresponding to the second rigid body based on the first physical attribute and the second physical attribute, capturing, by the physical engine, a collision point between the first rigid body and the second rigid body, and determining normal vector information corresponding to the collision point based on collision data, and determining a first cutting surface in the initial cutting model based on the collision point, the normal vector information, and model information of the initial cutting model, and cutting the initial cutting model based on the first cutting surface to obtain cutting data.

Abstract: An ultrasonic imaging device and a method for detecting endometrial peristalsis. The method comprises: acquiring ultrasound echo data of the endometrium (1), and determining on said basis the peristaltic displacement or peristaltic speed of a point in the endometrium within a preset period of time (2); calculating peristalsis parameters of the endometrium according to the peristaltic displacement or the peristaltic speed of the point in the endometrium within the preset period of time, the peristalsis parameters being used to describe the moving state of endometrial peristalsis (3); and displaying the peristalsis parameters (4). Thus, peristalsis parameters are calculated automatically without relying on the subjective determination of an ultrasound doctor, which improves the accuracy and efficiency of the detection of peristalsis.

Abstract: Disclosed are a manufacturing method for a laser chip and a laser chip. The manufacturing method comprises: step S1, forming a first electroplating substrate on an epitaxial layer; step S2, forming an organic pattern layer on the first electroplating substrate, wherein the pattern layer defines a hollowed-out area and a part of the first electroplating substrate is exposed to the pattern layer by means of the hollowed-out area; step S3, forming a first metal coating on the first electroplating substrate, wherein the first metal coating completely covers the pattern layer and the part of the first electroplating substrate not covered by the pattern layer; and step S4, removing the pattern layer to have a hollow channel formed between the first metal coating and the first electroplating substrate, wherein the channel is provided with at least one inlet and at least one outlet running through the first metal coating.

Abstract: An LED display panel is provided by the present application. Two adjacent LED devices located on both ends of a first splicing seam have a first splicing distance therebetween, and the first splicing distance is defined as D1+?A1. A first region is disposed with a plurality of first LED devices thereon. A pitch between at least portions of two adjacent first LED devices gradually decreases from an end close to the first splicing seam to an end away from the first splicing seam in the first region in a first direction, and a pitch between any two adjacent first LED devices is less than the first splicing distance and greater than a first target pitch.

Abstract: An error model calibration method can analyze discrete distribution situations of a pseudo-range measurement error and a Doppler measurement error under different carrier-to-noise ratios and altitude helping to calibrate and improve the universality of error model calibration. Observation data is received and satellite data is acquired based on the observation data. A pseudo-range error array and a Doppler error array are calibrated based on the observation data, geometric parameters, and the satellite data. The pseudo range error array describes errors of two terminals under a carrier-to-noise ratio and altitude angle of a satellite. The Doppler error array describes a discrete distribution of the two terminals. The pseudo-range error models respectively corresponding to the at least two terminals are fit using the pseudo-range error array. The Doppler error models respectively corresponding to the at least two terminals are fit using the Doppler error array.

Abstract: The present disclosure relates to a floating type boost-buck power factor correction (PFC) circuit and a light-emitting diode (LED) drive power supply. The floating type boost-buck PFC circuit includes a filter circuit, a rectifier bridge, a PFC control chip and a voltage sampling circuit, and further includes a PFC circuit; the PFC circuit includes a switching transistor Q1 and switching transistor Q2 with a withstand voltage of 600 V to 650 V, an energy storage inductor T1, a freewheel diode D0, a freewheel diode D1, an electrolytic capacitor E1 with a withstand voltage of 400 V to 450 V, a resistor RO and a capacitor C1. The LED drive power supply includes a DC/DC conversion circuit, an LLC control chip, an LED voltage/current sampling circuit, and the above floating type boost-buck PFC circuit.