Abstract: A wireless communication device includes a transceiver device and a data processing device. The transceiver device receives a frame from a wireless communication channel. The data processing device receives the frame and determines whether at least one of multiple predetermined frames has been received or is about to be received according to the frame. The data processing device enables a batch-frame indication mechanism when determining that said at least one of the multiple predetermined frames has been received or is about to be received. When the batch-frame indication mechanism is enabled, every time when one of the multiple predetermined frames is received, it is buffered in a reception queue instead of issuing a fetch indication, and when a number of predetermined frames buffered in the reception queue reaches a predetermined batch size, the data processing device issues the fetch indication to a back-end processing device.

Abstract: An optical waveguide element, including a first optical waveguide, a second optical waveguide, a third optical waveguide, and a grating, is provided. The second optical waveguide is disposed on the first optical waveguide. The third optical waveguide is disposed on the second optical waveguide. The grating is disposed between the first optical waveguide and the second optical waveguide. A refractive index of the second optical waveguide is smaller than a refractive index of the first optical waveguide and a refractive index of the third optical waveguide. A head-mounted display is also provided.

Abstract: An optical system includes a pancake lens assembly and a varifocal lens device. The varifocal lens device is coupled to the pancake lens assembly in a way that an optical axis of the varifocal lens device is in alignment with an optical axis of the pancake lens assembly, thereby permitting the optical system to have an adjustable focal length.

Abstract: A system for embedding credentials on an electronic document includes a task assignment device, a document database, a signature server and a credential server. The task assignment device generates an assigned task. The signature server generates a first signature request and a second signature request according to the assigned task. A first electronic device generates first signature information according to the first signature request. A second electronic device generates second signature information according to the second signature request. The signature server generates a first credential request and a second credential request according to the first signature information and the second signature information. The credential server transmits a first credential object and a second credential object to the signature server in response to the first credential request and the second credential request.

Abstract: An electrically tunable liquid crystal lens includes a carrier substrate, a common electrode layer disposed on the carrier substrate, a liquid crystal unit, a patterned electrode layer, a terminal electrode layer, a dielectric insulating layer, and a cover. The liquid crystal unit is disposed on the common electrode layer opposite to the carrier substrate, and includes a plurality of liquid crystal molecules. The patterned electrode layer is disposed on the liquid crystal unit opposite to the common electrode layer, and has a plurality of aperture patterns located within a projection of the liquid crystal unit on the patterned electrode layer. The terminal electrode layer is disposed on the patterned electrode layer opposite to the liquid crystal unit. The dielectric insulating layer is disposed between the patterned electrode layer and the terminal electrode layer. The cover is disposed on the terminal electrode layer opposite to the dielectric insulating layer.

Abstract: An electrically tunable liquid crystal lens includes a carrier substrate, a common electrode layer disposed on the carrier substrate, a liquid crystal unit, a patterned electrode layer, a terminal electrode layer, a dielectric insulating layer, and a cover. The liquid crystal unit is disposed on the common electrode layer opposite to the carrier substrate, and includes a plurality of liquid crystal molecules. The patterned electrode layer is disposed on the liquid crystal unit opposite to the common electrode layer, and has a plurality of aperture patterns located within a projection of the liquid crystal unit on the patterned electrode layer. The terminal electrode layer is disposed on the patterned electrode layer opposite to the liquid crystal unit. The dielectric insulating layer is disposed between the patterned electrode layer and the terminal electrode layer. The cover is disposed on the terminal electrode layer opposite to the dielectric insulating layer.

Abstract: A pancake lens assembly includes a partially reflective mirror, a reflective polarizer, a quarter waveplate, a polarization-dependent optical device, and at least one polarization controller. When a light beam is introduced into the pancake lens assembly along an optical axis in a Z direction to pass through the polarization controller in a first state, a polarization direction of the light beam is converted by the polarization controller. When the light beam is introduced into the pancake lens assembly along the optical axis to pass through the polarization controller in a second state, the polarization direction of the light beam is prevented from being converted by the polarization controller.

Abstract: A metal-ion battery is provided. The metal-ion battery can include a negative electrode, a positive electrode, a separator, and an electrolyte, wherein the positive electrode and the negative electrode are separated by the separator and the electrolyte is disposed between the positive electrode and the negative electrode. The negative electrode can include a negative electrode current-collector and a negative electrode active layer, wherein the negative electrode current-collector has a porous structure and the negative electrode current-collector directly contacts to the surface of the negative electrode active layer. The electrolyte can include an ionic liquid and a metal halide.

Abstract: A pancake lens assembly includes a partially reflective mirror, a reflective polarizer, a quarter waveplate, a polarization-dependent optical device, and at least one polarization controller. When a light beam is introduced into the pancake lens assembly along an optical axis in a Z direction to pass through the polarization controller in a first state, a polarization direction of the light beam is converted by the polarization controller. When the light beam is introduced into the pancake lens assembly along the optical axis to pass through the polarization controller in a second state, the polarization direction of the light beam is prevented from being converted by the polarization controller.

Abstract: An optical system includes a pancake lens assembly and a varifocal lens device. The varifocal lens device is coupled to the pancake lens assembly in a way that an optical axis of the varifocal lens device is in alignment with an optical axis of the pancake lens assembly, thereby permitting the optical system to have an adjustable focal length.

Abstract: A varifocal lens device includes a lens unit and a polarization controller. The lens unit has different optical powers for different polarization directions of light. When a light beam is introduced into the varifocal lens device through the polarization controller in a first state, a polarization direction of the light beam is converted by the polarization controller. When the light beam is introduced into the varifocal lens device through the polarization controller in a second state, the polarization direction of the light beam is prevented from being converted by the polarization controller.

Abstract: A color matching method and a color matching device are provided, the color matching method includes: S1, determining a target color; S2, judging whether color data of a sample is obtained, if yes, proceeding to step S3, and if not, proceeding to step S5; S3, measuring the color data of the sample and displaying a color on a substrate, and proceeding to step S4; S4, judging whether the color displayed on the substrate is consistent with the target color, and if not, proceeding to step S6, and if yes, proceeding to step S7; S5, selecting a color and emitting light consistent with a chromaticity value of the selected color onto the substrate and proceeding to step S6; S6, adjusting the color displayed on the substrate until an adjusted color displayed on the substrate is consistent with the target color, and proceeding to S7; and S7, storing data.

Abstract: A wireless communication device includes a transceiver device and a data processing device. The transceiver device receives a frame from a wireless communication channel. The data processing device receives the frame and determines whether at least one of multiple predetermined frames has been received or is about to be received according to the frame. The data processing device enables a batch-frame indication mechanism when determining that said at least one of the multiple predetermined frames has been received or is about to be received. When the batch-frame indication mechanism is enabled, every time when one of the multiple predetermined frames is received, it is buffered in a reception queue instead of issuing a fetch indication, and when a number of predetermined frames buffered in the reception queue reaches a predetermined batch size, the data processing device issues the fetch indication to a back-end processing device.

Abstract: An index grating of an optical encoder provided by the invention has a main technical feature of increasing a ratio of light-transmissible area of a grating per unit area, thereby increasing a light source utilization efficiency and a signal intensity, and reducing light-blocking ratio caused by dust and other foreign matters, thereby reducing a degree of influence on light intensity, so as to improve a sensing precision of the optical encoder.

Abstract: An index grating of an optical encoder provided by the invention has a main technical feature of increasing a ratio of light-transmissible area of a grating per unit area, thereby increasing a light source utilization efficiency and a signal intensity, and reducing light-blocking ratio caused by dust and other foreign matters, thereby reducing a degree of influence on light intensity, so as to improve a sensing precision of the optical encoder.

Abstract: An electrode and a device employing the same are provided. The electrode includes a main body, and an active material. The main body includes a cavity and is made of a conductive network structure. In particular, the active material is disposed in the cavity, wherein the length of the longest side of the particle of the active material is greater than the length of the longest side of the pore of the conductive network structure such that the active material is confined in the conductive network structure.

Abstract: A metal-ion battery is provided. The metal-ion battery can include a negative electrode, a positive electrode, a separator, and an electrolyte, wherein the positive electrode and the negative electrode are separated by the separator and the electrolyte is disposed between the positive electrode and the negative electrode. The negative electrode can include a negative electrode current-collector and a negative electrode active layer, wherein the negative electrode current-collector has a porous structure and the negative electrode current-collector directly contacts to the surface of the negative electrode active layer. The electrolyte can include an ionic liquid and a metal halide.

Abstract: The present invention is directed to a device which includes the following features: a light source illuminates a target to generate an optical inspection signal; a probe head provides an optical path for the optical inspection signal; a probe tube arranged at a front end of the probe head; at least one switched filter module arranged in the optical path, allowing the optical inspection signal to pass therethrough to generate a corresponding spectral signal; and an image sensor arranged behind the switched filter module, receiving the spectral signal and generating a spectral image. The spectral image can be transmitted to an external device, wherefrom the user can use the spectral image to examine the target in further detail. The present invention features a rotary-type or movable-type switched filter module, which facilitates the user to switch filters easily during optical inspection.

Abstract: A method for measuring microfluctuation of accommodation includes attaching at least one first sensing element to the area around an eye of a testee for measuring an electromyograph (EMG) signal, using a processing module to pick up a specified frequency range of the EMG signal as a measurement index of microfluctuation of accommodation, storing the processed measurement index of microfluctuation of accommodation in a storage module, and analyzing the measurement index to evaluate the physiological states of the testee.

Abstract: A real-time color mapping system includes a memory and a converting module. The memory is configured for storing a mapping table. The converting module is configured for reading the mapping table stored in the memory, and for converting first image grayscale values corresponding to a first image signal into second image grayscale values corresponding to a second image signal according to the mapping table. The converting module utilizes at least part of bits corresponding to each of the first image grayscale values as a memory address to look up in the mapping table, thereby converting the first image grayscale values into the second image grayscale values. A real-time color mapping method is provided herein as well.