Coretronic Patente

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An illumination system includes an excitation light source module, a light splitting and combining module, a filter module, and a wavelength conversion module. The excitation light source module provides an excitation beam. The light splitting and combining module is disposed on a transmission path of the excitation beam. The excitation beam includes a first and a second excitation beam which are different from each other in polarization state or wavelength range. The filter module is disposed on the transmission path of the excitation beam. The filter module includes a light passing area configured to allow the excitation beam to pass there-through and a light filtering area. The wavelength conversion module is disposed on the transmission path of the excitation beam reflected by the light filtering area and configured to convert the reflected excitation beam into a conversion beam. A projection apparatus including the above illumination system is also provided.

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A projection device (110) including a processor circuit (112) is provided. A reverse-warped image is generated by the processor circuit (112) according to an input image and a second mapping table. The projection device (110) is adapted to project the reverse-warped image onto the projection screen (120). The second mapping table is converted from a first mapping table according to a plurality of warped feature points caused according to a first calibration pattern and a second calibration pattern. A projection system (100) and an image calibration method are also provided. Therefore, an undistorted and a non-warped image may be formed on a curved projection screen and be viewed by a viewer.

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A focus identification method adaptable for a focus identification system is provided. The focus identification method includes: capturing (S210) a projection picture to generate a captured picture; dividing (S220) the captured picture into a plurality of image regions; calculating (S230) a plurality of sharpness values corresponding to the plurality of image regions respectively according to image data of the plurality of image regions; and displaying (S240) the plurality of sharpness values on the plurality of corresponding image regions respectively to generate a first focus identification picture. Moreover, the disclosure further discloses a focus identification system applying the focus identification method. The focus identification method and the focus identification system using the same in the disclosure may improve the remote maintenance efficiency.

An illumination system including an excitation light source, a wavelength conversion module, a light splitting module and a light homogenizing element is provided. The light splitting module has a transfer region and a light splitting region, an excitation beam incident to the wavelength conversion module is converted into a wavelength converted beam by a wavelength conversion region, and is reflected by the reflection region, and the excitation beam coming from the wavelength conversion module is split into a first and a second sub-excitation beams by the light splitting region, and the first sub-excitation beam and the second sub-excitation beam form an excitation combination beam. The light homogenizing element uniforms the excitation combination beam and the wavelength converted beam, where an angle of the excitation combination beam incident to the light homogenizing element is 0.25 times larger than an angle of the wavelength converted beam incident to the light homogenizing element.

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An optical lens and a head-mounted display device including the optical lens are provided. The optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially arranged from a light exit side to a light incident side. An image generator is disposed at the light incident side. The optical lens is configured to receive an image light beam provided by the image generator. A stop is formed at the light exit side of the image light beam. At the stop, the image light beam has a minimum light beam cross-sectional area. The technical solution of the invention may be used to shorten an overall length of the optical lens, so as to reduce an appearance volume of the display.

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A backlight module includes a light guide plate, a light source, an optical film set and at least one light shielding layer. The light guide plate has a light incident surface and a light emitting surface adjacent to the light incident surface. The light source is disposed beside the light incident surface. The optical film set includes a first surface, a second surface and at least one end surface. The first surface and the second surface are opposite to each other. The at least one end surface is connected to the first surface and the second surface. The optical film set is disposed on the light emitting surface of the light guide plate. The first surface faces the light emitting surface. The at least one light shielding layer is disposed on the at least one end surface. A display device using the backlight module is also provided.

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A display for near-eye, virtual reality and augmented reality applications is disclosed. An input beam (LB0) is reflected in a beam-splitting element (110) towards a reflective liquid crystal panel (140). A polarisation modulating element (120) and a polarisation-dependent beam-shifting element (130) are successively positioned between the splitter and the LC-panel. These produce two beams (LB1, LB2), sequential in time but having orthogonal polarisations and shifted in position, which are incident on the LC-panel. After passing back through the three elements, two image beams (IB1', IB2') having the same polarisation state are produced and are projected onto a target. The beams are shifted in position with respect to each other and the target receives two image frames sequentially in time. Each pixel displayed in one image frame overlaps with the respective pixel in the other. In this way, a higher resolution image can be achieved.

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