Abstract: Display devices include waveguides with in-coupling optical elements that mitigate re-bounce of in-coupled light to improve in-coupling efficiency and/or uniformity. A waveguide receives light from a light source and includes an in-coupling optical element that in-couples the received light to propagate by total internal reflection within the waveguide. The in-coupled light may undergo re-bounce, in which the light reflects off a waveguide surface and, after the reflection, strikes the in-coupling optical element. Upon striking the in-coupling optical element, the light may be partially absorbed and/or out-coupled by the optical element, thereby reducing the amount of in-coupled light propagating through the waveguide.

Abstract: An anti-force brake testing platform for an electric vehicle based on model predictive control (MPC) includes a first testing unit; a second testing unit; a third testing unit; a fourth testing unit; a wheelbase adjustment device; and a control cabinet system. The first and second testing units are structurally identical and have the same height, and are provided at the same horizontal foundation plane, with each including a first driving device, a first roller group, a first lifting device, a steering device, a frame, and a first control and test device. The third and fourth testing units are structurally identical, with each including a second driving device, a second roller group, a second lifting device, an anti-slip stopping mechanism, a first fixed base frame, a locking mechanism, and a second control and test device. The wheelbase adjustment device includes a second fixed base frame and a movable stand.

Abstract: A display method, a display device and a computer-readable storage medium are disclosed for solving low resolution problem in display imaging of display devices assembled with Micro LEDs in the prior art. The display method is applied to the display device comprising an imaging assembly having at least one light source body and a scanning mirror located in a light path of light emitted from the light source body. The display method comprises: obtaining the resolution of an image to be displayed (S100); determining swing information of the scanning mirror and an output frequency of outputting a light beam from the light source body according to the resolution, the swing information comprises a swing frequency equal to the output frequency (S200); controlling the scanning mirror to swing according to the swing information and controlling the light source body to output light beam information according to the output frequency (S300).

Abstract: Disclosed are a projection optical path and a projection device. The projection optical path includes a first converged light of a first dual-light source system and a second converged light of a second dual-light source system; a first wavelength light, a second wavelength light, and a third wavelength light are respectively one of red light, green light, and blue light; a fourth wavelength light is within a wavelength range of the red light; the wavelength of the fourth wavelength light is defined as ?1; the wavelength of the one set as the red light among the first wavelength light, the second wavelength light, and the third wavelength light is ?2; ?1 is unequal to ?2; an excitation light source emits an excitation light; and the excitation light is emitted to the first dual-light source system or the second dual-light source system.

Abstract: The projection optical path comprises a triple light source system emitting a first converged light and a single light source system emitting a light with a monochromatic wavelength. The triple light source system comprises a second converged light converged with a light with a first wavelength to form the first converged light. The single light source system comprises a third light source. The light with the first wavelength, the light with the second wavelength, and the light with the third wavelength are respectively one of red light, green light, blue light, a wavelength range of a light with a fourth wavelength is within a wavelength range of the red light. The wavelength of the light with the fourth wavelength is defined as ?1; the wavelength of the red light among the lights with the three wavelengths is ?2, and ?1??2.

Abstract: Disclosed are a projection optical path and a projection device. The projection optical path includes a first converged light of a first dual-light source system and a second converged light of a second dual-light source system; a first wavelength light, a second wavelength light, and a third wavelength light are respectively one of red light, green light, and blue light; a fourth wavelength light is within a wavelength range of the red light; the wavelength of the fourth wavelength light is defined as ?1; the wavelength of the one set as the red light among the first wavelength light, the second wavelength light, and the third wavelength light is ?2; ?1 is unequal to ?2; an excitation light source emits an excitation light; and the excitation light is emitted to the first dual-light source system or the second dual-light source system.

Abstract: Disclosed are an AR projection assembly and an AR device, and the AR projection assembly comprises: an image displaying source, the image displaying source including a Micro-LED single-color displaying element and a Micro-LED dual-color displaying element; a light combining element, the light combining element being disposed on light emitting paths of the Micro-LED single-color displaying element and the Micro-LED dual-color displaying element and configured to combine single-color light given off by the Micro-LED single-color displaying element and dual-color light given off by the Micro-LED dual-color displaying element into a full-color image; a lens assembly, the lens assembly including a first lens, a second lens and a third lens which are disposed in sequential proximity to the light combining element on a light emitting path of the light combining element, the first lens and the third lens having a positive focal length, and the second lens having a negative focal length.

Abstract: The projection optical path comprises: a main optical path; and an auxiliary optical path, a third light source, and a fourth light source, wherein the light with the second wavelength, the light with the third wavelength and the light with the fourth wavelength are sequentially converged into the light with the first wavelength, wherein the light with the first wavelength, the light with the second wavelength and the light with the third wavelength are one of red light, green light, and blue light, respectively, wherein a wavelength range of the light with the fourth wavelength is within a wavelength range of the red light, and a wavelength of the light with the fourth wavelength is defined as ?1, and a wavelength of the red light among the light with the first wavelength, the light with the second wavelength and the light with the third wavelength is defined as ?2, and ?1??2.

Abstract: A display method, a display device and a computer-readable storage medium are disclosed for solving low resolution problem in display imaging of display devices assembled with Micro LEDs in the prior art. The display method is applied to the display device comprising an imaging assembly having at least one light source body and a scanning mirror located in a light path of light emitted from the light source body. The display method comprises: obtaining the resolution of an image to be displayed (S100); determining swing information of the scanning mirror and an output frequency of outputting a light beam from the light source body according to the resolution, the swing information comprises a swing frequency equal to the output frequency (S200); controlling the scanning mirror to swing according to the swing information and controlling the light source body to output light beam information according to the output frequency (S300).

Abstract: A safe early warning method and device for full-section tunneling of a tunnel featuring dynamic water and weak surrounding rock, comprising establishing a dynamic coordinate system with an origin thereof moving along a tunnel excavation line, recording the moving distance of the origin, conducting three-dimensional laser scanning with the origin as a center to obtain point cloud data including coordinate data, collecting surrounding rock data; conducting deformation fitting on the point cloud data, calculating a fitting residual error, removing a noisy point, and conducting preprocessing; combining data of preprocessed point cloud, surrounding rock, and the tunnel excavation line to construct a tunnel excavation dynamic model; conducting stress analysis according to the model and determining whether to send out a safety early warning signal.

Abstract: A safe early warning method and device for full-section tunneling of a tunnel featuring dynamic water and weak surrounding rock, comprising establishing a dynamic coordinate system with an origin thereof moving along a tunnel excavation line, recording the moving distance of the origin, conducting three-dimensional laser scanning with the origin as a center to obtain point cloud data including coordinate data, collecting surrounding rock data; conducting deformation fitting on the point cloud data, calculating a fitting residual error, removing a noisy point, and conducting preprocessing; combining data of preprocessed point cloud, surrounding rock, and the tunnel excavation line to construct a tunnel excavation dynamic model; conducting stress analysis according to the model and determining whether to send out a safety early warning signal.

Abstract: Devices comprised of end-on waveguide-coupled photodetectors are described. In embodiments of the invention, the photodetectors are avalanche photodiodes coupled end-on to a waveguide. The waveguide includes an insulating trench proximate to the coupled photodetector. In embodiments of the invention, the avalanche photodiodes are silicon/germanium avalanche photodiodes.

Abstract: Devices comprised of end-on waveguide-coupled photodetectors are described. in embodiments of the invention, the pbotodetectors are avalanche photodiodes coupled end-on to a waveguide. The waveguide comprises an insulating trench proximate to the coupled photodetector. In embodiments of the invention, the avalanche photodiodes are silicin/germanium avalanche photodiodes.

Abstract: A circuit for clocking includes an input data path, a receiver, a set of flip-flops, at least one interpolator and a controller. The receiver is coupled to the input data path for receiving input data. The flip-flops, coupled to the receiver, sample the input data. A first interpolator, coupled to one or more of the flip-flops, receives the sampled input data. The controller, coupled to the first interpolator, controls the first interpolator by providing phase information regarding the input data to the first interpolator. The circuit reduces any jitter transferred from the input path to an output path.

Abstract: A frequency synthesis circuit includes a phase locked loop and an interpolator circuit. The phase locked loop circuit receives a reference clock and a feedback clock and generates an output clock with a frequency based on the reference clock and the feedback clock. An interpolator circuit is coupled in the feedback path of the phase locked loop circuit. An interpolator control circuit generates an interpolator control word that specifies a variable time delay for the interpolator circuit. The interpolator circuit receives the output clock, and generates the feedback clock by introducing a variable time delay in the output clock in accordance with the interpolator control word. The time variable delay varies the frequency of the output circuit. Embodiments for frequency synthesis circuits that include a spread spectrum frequency clock generator, frequency modulators, and a fixed frequency clock generator circuit are disclosed.

Abstract: A circuit for clocking includes an input data path, a receiver, a set of flip-flops, at least one interpolator and a controller. The receiver is coupled to the input data path for receiving input data. The flip-flops, coupled to the receiver, sample the input data. A first interpolator, coupled to one or more of the flip-flops, receives the sampled input data. The controller, coupled to the first interpolator, controls the first interpolator by providing phase information regarding the input data to the first interpolator. The circuit reduces any jitter transferred from the input path to an output path.

Abstract: A method and apparatus for a multiple lane transmission system that provides both a low latency mode of operation, while at the same time, provides reduced lane-lane skew. The overall transmission system operates as a mesochronous system, whereby each clock domain of the transmission system is synchronized to the leaf nodes of a global clock tree. A phase aligner is then used to align the phase of both the bit and byte clocks of each transmission lane to the clock signal generated at the leaf nodes of the global clock tree.

Abstract: Data and clock synchronization within a gigabit receiver is maintained throughout the data byte processing logic of the receiver by utilizing the same byte clock signal. The deserialization clock signal that is used to deserialize the received serial data stream is phase coherent with the distributed byte clock signal used within the physical coding sublayer (PCS), thus establishing reliable data transfer across the physical media attachment (PMA) and PCS layers of the gigabit receiver while maintaining a known, fixed latency. The phase relationship between a derived bit clock signal and the byte clock signal is shifted in a manner that achieves coarse data alignment within each data byte without affecting the latency. Conversely, the coarse data alignment is combined with a data alignment toggling procedure to reduce data alignment granularity with minimized latency changes.

Abstract: A method and apparatus for a receive equalizer of a gigabit transceiver that is reconfigurable to support multiple communication standards. Communication standards having variable common mode and coupling requirements are accommodated through the use of reconfigurable integrated circuits (ICs), such as field programmable gate arrays (FPGAs), that provide a plurality of reconfigurable transceivers that are programmable through configuration, or partial reconfiguration, events. The reconfigurable transceivers apply internally generated common mode voltage signals to the differential input in support of the various communication standards.

Abstract: A belt tension mechanism includes a tension roller disposed on a side of a photoconductive belt for pressing the photoconductive belt, a first elastic component connected to the tension roller for providing the elastic force to the tension roller, and a releasing device disposed on the other side of the photoconductive belt. The releasing device includes a actuating component for moving in a first direction and separating from the tension roller when being electrified so that the first elastic component can drive the tension roller to a position where the tension roller can press the photoconductive belt, and a second elastic component connected to the actuating component for driving the actuating component to a second direction opposite to the first direction when the actuating component is not electrified so that the actuating component can drive the tension roller to a position where the tension roller cannot press the photoconductive belt.