Abstract: A projection screen, comprising a screen substrate and a plurality of light reflecting portions, wherein the light reflecting portion is arranged on an incident side of the screen substrate, and has a first surface and a second surface that face different directions, the first surface facing an incident direction of projection light, and the plurality of light reflecting portions are continuously arranged on the screen substrate to form a structure of sawtooth shape, wherein a light absorbing layer is provided on the second surface; and a wavelength-selection filter layer is provided on the first surface, and the wavelength-selection filter layer is configured to reflect the projection light and transmit and absorb at least part of ambient light.

Abstract: A projection system, comprising a light modulation device, a light source system and a light offset device. The light source system is used for emitting one or more illumination sub-beams. The light modulation device is used for modulating illumination light according to image data to form image light, the image light being used for displaying an image corresponding to the image data. The light offset device is used for transferring one illumination sub-beam to each zone of a micro-mirror unit by means of a time sequence such that the micro-mirror unit modulates the illumination sub-beam by means of a time sequence to form image light of a pixel corresponding to each zone, wherein each zone corresponds to one pixel of an image.

Abstract: The present disclosure relates to a secondary battery and a battery pack, and the secondary battery includes: an outer casing, comprising a case and a cap assembly connected to each other, the case is provided with an opening, the cap assembly includes a cap plate and an electrode terminal connected to the cap plate, wherein the cap plate is adapted to cover the opening; an electrode assembly accommodated in the case and including a main body and a tab extending out from the main body, wherein the tab is electrically connected to the electrode terminal; a vent connected to the outer casing; and an insulating member at least partially disposed between the electrode assembly and the vent, wherein a projection of the vent on the main body is at least partially covered by the insulating member.

Abstract: A light emitting device includes a first light source, a light guiding system and a wavelength conversion device. The first light source is configured to emit first excitation light which enters the light guiding system via an incident light channel. The light guiding system is configured to guide the first excitation light to the wavelength conversion device. The wavelength conversion device includes a reflecting segment that reflects the first excitation light to form second excitation light. The light guiding system is further configured to collect the second excitation light and guide the second excitation light to exit via an output light channel. The first excitation light and the second excitation light have non-overlapping light paths.

Abstract: A curved screen (B) comprises the following layers sequentially arranged from inside to outside: a black light-absorbing layer (100), a microstructure array layer (200), and a transparent matrix layer (300). The microstructure array layer (200) consists of a plurality of microstructure units. The microstructure unit is a V-shaped recess (210) consisting of two intersecting inclined surfaces. The microstructure array layer (200) is rotationally symmetrical with respect to a center line of the curved screen (B). Angles of the V-shaped recesses (210) in respective longitudinal cross sections of the curved screen (B) are uniquely determined according to incident angles of light rays from a projector. Also disclosed are a method of arranging microstructures in the curved screen (B) and a projection system comprising the curved screen (B). The curved screen (B) has a higher contrast, improved brightness uniformity and an enlarged field of view.

Abstract: Provided is a wavelength conversion apparatus that includes a metal substrate; and a light-emitting ceramic layer. The light-emitting ceramic layer is used for absorbing excitation light and emitting excited light having a wavelength different from that of the excitation light. A metal reflective layer and a silica gel layer are stacked between the metal substrate and the light-emitting ceramic layer, and the reflective layer is used for reflecting the excited light and an unconverted part of the excitation light. The wavelength conversion device can reduce heat generated in the wavelength conversion apparatus, while realizing an aim of emitting excited light having a high illumination intensity in the wavelength conversion apparatus.

Abstract: A total reflection screen comprises a light diffusion layer, a total reflection layer and a light absorption layer arranged sequentially from an incidence side of the projected light. The light absorption layer can absorb an incident light. The light diffusion layer is used for increasing a divergence angle of an emergent light. The total reflection layer comprises a plurality of microstructure units that is rotationally symmetrical and extends continuously in a plane of the total reflection screen. Each of the microstructure units comprises a first material layer disposed at the side of the light diffusion layer and a second material layer disposed at the side of the light absorption layer. The interface between the first material layer and the second material layer is comprised of two intersecting planes, which are disposed in such a way that the projected light is subjected to total reflection continuously at the two intersecting planes.

Abstract: The present disclosure provides a battery module and a battery pack. The battery pack comprises a box and a battery module, the battery module is accommodated in the box. The battery module comprises batteries sequentially arranged in a first direction. The battery comprises an electrode assembly, a case and a cap assembly, the electrode assembly is received in the case, and the cap assembly is connected with the case. The case comprises two first side walls, and the two first side walls are respectively positioned at two sides of the electrode assembly in the first direction. The first side walls of two adjacent batteries face each other. An area of the first side wall is defined as S1, a distance between the electrode assemblies of two adjacent batteries in the first direction is defined as D, S1 and D satisfying a relationship: 1.2×10?5 mm?1?D/S1?500×10?5 mm31 1.

Abstract: The present disclosure provides a battery pack and a vehicle. The battery pack comprises a battery module, a box assembly and a first adhesive member. The battery module comprises first batteries arranged sequentially in a horizontal direction. The first battery comprises an electrode assembly and a case, and the electrode assembly is received in the case. The electrode assembly comprises a first electrode plate, a second electrode plate and a separator. The box assembly has a connection portion, and the connection portion is positioned at a side of the battery module in the vertical direction. An outer surface of the case comprises a first surface, and the first surface is connected with the connection portion via the first adhesive member. An area A of the first surface and an elastic modulus B of the first adhesive member satisfy a relationship: 0.02 cm2/MPa?A/B?9 cm2/MPa.

Abstract: A light guide component and a light source device. The light guide component comprises a reflecting plate (131) having an aperture and a transflective coated plate (132). The reflecting plate (131) reflect light. The aperture allows light to pass through. The transflective coated plate (132) is connected to the reflecting plate (131) and covers the aperture, and transmits an excitation light and reflects light of a color different from that of the excitation light.

Abstract: A projection display system, comprising: a first light source for emitting a first light; a first light modulation system for receiving the first light and modulating the first light into a first image light; a supplementary light source for at least emitting a supplementary light, wherein a spectrum of the first light comprises a spectrum of the supplementary light; a second light modulation system for receiving the supplementary light and modulating the supplementary light into a supplementary image light; a light combining device for combining the first image light and the supplementary image light, the beam cross-sectional area of the first image light being greater than the beam cross-sectional area of the supplementary image light at the light combining position; and a projection lens system for causing the first image light and the supplementary image light to form coincident images at a predetermined position.

Abstract: A light source, including an excitation light source, an excited light supplying device, a partially coating film and a light supplementing device. The partially coating film is arranged on light path of the excitation light and the excited light, which includes a first area for transmitting/reflecting the excitation light to form main path light or side path light respectively, and a second region area for reflecting/transmitting all incident light; the excited light supplying device is provided on light path of the main path light to generate excited light transmitted to the partially coating film after irradiated by main path light; the light supplement device is provided on light path of the side path light for performing light homogenization on the side path light and generating supplemental light transmitted to the partially coating film; and the supplemental light combines with the excited light after passing through the partially coating film.

Abstract: A light source system includes an excitation light unit, a spectral filter unit, a scattering unit, and an excited-light unit. The excitation light unit is configured to emit excitation light. In an embodiment, the spectral filter unit reflects a portion of the excitation light to the scattering unit, the scattering unit scatters the same to generate a first light and a second light, and the spectral filter unit transmits the second light. The spectral filter unit also transmits another part of the excitation light to the excited-light unit, the excited-light unit emits excited light under the illumination thereof, and the spectral filter unit reflects the excited light, so that the spectral filter unit merges and emits the transmitted second light and the reflected excited light. The excitation light is thus split into two paths at the spectral filter unit, and finally emits light by combining excitation light and excited light.

Abstract: The present invention relates to a secondary battery and a battery module. The secondary battery includes: a casing including a receiving cavity having an opening; a top cover assembly, and an electrode assembly disposed in the receiving cavity, wherein the electrode assembly includes two end faces disposed opposite to each other in a first direction perpendicular to a depth direction of the receiving cavity, a lug extending from each end face; the lug is a layered structure and has a redundant section near the end face and a connecting section connected to the redundant section; the current collecting member includes a current collecting portion fixedly connected to the connecting section. The lug of the secondary battery of the embodiment of the present invention has the redundant section, which can effectively buffer the movement and reduce the possibility that the lug is torn or broken due to an excessive tensile stress.

Abstract: An excitation light intensity control system, including a lighting part, an imaging part and a control part. The lighting part includes a light source; the imaging part includes a light modulator and a color conversion element; the excitation light emitted from the light source is imported to the light modulator for modulation; the modulated excitation light excites the color conversion element to produce multicolor excited light; the lighting part further includes a light recycling system used for recoupling part of the excitation light emitted from the light modulator to be incident to the light modulator; the control part includes a controller used for receiving original image data and controlling the intensity of the excitation light emitted from the light modulator and/or the light source.

Abstract: A laser illumination device and a projection system including the same. The laser illumination device includes a laser source, a light combining assembly, a micro-lens assembly, and a plurality of cylindrical lens assemblies; the plurality of cylindrical lens assemblies are provided in a light transmission path of the laser source; the micro-lens assembly is mounted at one side of the light combining assembly; each cylindrical lens assembly includes a first cylindrical lens array and a second cylindrical lens array; and the first cylindrical lens array and the second cylindrical lens array form a preset angle.

Abstract: There is provided a process cartridge that includes a driving assembly engageable with a driving shaft having a recess in an image forming apparatus. The driving assembly includes a coupling member, configured to receive a driving force from the driving shaft and provided with a power receiving portion engageable with the recess of the driving shaft; and a body portion capable of rotating after receiving the driving force transmitted by the power receiving portion. When the driving assembly is mounted in the image forming apparatus, the power receiving portion can urge the axis of the driving shaft to be inclined with respect to the axis of the driving assembly. The coupling member urges the driving shaft to be inclined to implement engagement and disengagement, thus solving the technical problem in the prior art that the driving assembly has complicated molding process, high production costs and unstable transmission of the driving force.

Abstract: The present disclosure provides a secondary battery, a battery module and a vehicle. The secondary battery includes an electrode assembly, a case and a cap assembly. The case has an accommodating cavity, and the electrode assembly is accommodated in the accommodating cavity. The electrode assembly includes electrode units, and the electrode units are stacked in an axial direction of the accommodating cavity. The cap assembly includes a cap plate and an insulating member provided at an inner side of the cap plate, the cap plate is connected with the case, and the insulating member is positioned at a side of the electrode assembly in the axial direction. The insulating member is provided with a first surface at a side close to the electrode assembly, and the first surface is a flat surface.

Abstract: An electrocatalytic material includes a bulk material metal including at least one metal, wherein the bulk material metal is in an amorphous form and includes mesopores. A method for making an electrocatalytic material includes forming an amorphous bulk material metal, and forming mesopores in the amorphous bulk material metal. The bulk material metal may in some instances be selected from an alloy of at least one metal and at least one non-metal selected from phosphorus, boron, nitrogen, carbon, and any combination thereof. The at least one metal may in some instances be selected from iron, cobalt, nickel, copper, zinc, titanium, manganese, molybdenum, niobium, zirconium, and any combination thereof.