Abstract: A free-space dynamic diffractive projection apparatus comprises a laser light source element, a dynamic diffractive element, a control element, and a signal output element. Based on a pattern signal outputted from the signal output element, the control element controls the laser light source element to emit a color beam, and controls the dynamic diffractive element to perform real-time signal modulation so as to generate different dynamic diffractive grating distributions in a specific period. Accordingly, the color beam passes through the dynamic diffractive element to produce the pixels defined by the pattern signal in a specific space. The control element controls the dynamic diffracting element to be quickly switched to display each pixel, so that each pixel is projected on a corresponding position in a specific space to form a two-dimensional geometric image.

Abstract: A dynamic diffractive image projection device includes a first laser light source, a second laser light source, a third laser light source, a first dynamic diffractive optical element, a second dynamic diffractive optical element, a third dynamic diffractive optical element, a controller, and a combiner. The first, second, and third color beams provided by the first, second, and third laser light sources respectively pass through the first, second, third dynamic diffractive optical elements, which are controlled by the controller to perform real-time signal modulation for producing dynamic diffractive grating distributions, so as to produce a pixel corresponding to a specific position of an image frame. The combiner combines the color beams at the corresponding specific position. The controller performs a fast switching and playing on the first, second and third dynamic diffractive optical elements so as to project a two-dimensional full-color image frame by scanning.

Abstract: A seat structure is provided for disposing below an assembly in order to support the assembly from underneath. The assembly has a base portion formed with an opening. The seat structure includes a bottom seat for placing within the opening in the base portion and a plurality of flexible connecting elements. Each flexible connecting element includes an outer bent end connected to a periphery confining the opening in the base portion, an inner bent end connected to the bottom seat and a main body between the outer and inner bent ends. The vibration of the assembly is absorbed by the seat structure to provide stability to the assembly.

Abstract: A seat structure is provided for disposing below an assembly in order to support the assembly from underneath. The assembly has a base portion formed with an opening. The seat structure includes a bottom seat for placing within the opening in the base portion and a plurality of flexible connecting elements. Each flexible connecting element includes an outer bent end connected to a periphery confining the opening in the base portion, an inner bent end connected to the bottom seat and a main body between the outer and inner bent ends. The vibration of the assembly is absorbed by the seat structure to provide stability to the assembly.