Abstract: A display device includes a light source, a light-directing element, a reflective display element, and a microlens array. The light-directing element is disposed on the transmission path of a lighting beam provided by the light source for projecting the lighting beam toward the first direction. The reflective display element includes a plurality of micro-image units, wherein each micro-image unit converts the lighting beam projected from the light-directing element into an sub-image beam and reflects the sub-image beam. The microlens array is disposed on the transmission path of the sub-image beams, wherein the light-directing element is located between the microlens array and the reflective display element. The microlens array includes a plurality of microlenses. Each sub-image beam pass throughs the light-directing element and is projected to an aperture by the corresponding microlens, and the sub-image beams pass through the aperture to form an image beam.

Abstract: An optical element configured to allow an image beam passing through is provided. The optical element includes a first and a second birefringent layer and a gas layer between the first and the second birefringent layer. An extension direction of the gas layer is inclined with respect to an extension direction of the optical element, wherein the image beam passes through the first birefringent layer, the gas layer and the second birefringent layer in sequence. A first and a second sub image beam having different deflection angles are generated from the image beam when the image beam enters the gas layer. After the first and the second sub image beam are emitted from the second birefringent layer, a transmission path of the first and the second sub image beam are offset from each other by an offset distance, thereby improving resolution of an image to be viewed.

Abstract: A display device includes a light source, a light-directing element, a first lens, a microlens array, and a reflective display element. The light-directing element is adapted to project a lighting beam provided by the light source toward an incident direction. The first lens is configured to receive the lighting beam projected by the light-directing element and project the lighting beam toward the incident direction. The first lens is located between the microlens array and the light-directing element. The micro-image units of the reflective display element correspond to the microlenses of the microlens array respectively. Each micro-image unit converts the lighting beam into an sub-image beam and reflect the sub-image beam to the microlens array. Each sub-image beam is projected to the first lens by the corresponding microlens, and the sub-image beams pass through the light-directing element and transmit to an aperture to form an image beam.

Abstract: 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.

Abstract: An optical lens and a head-mounted display device are provided. The optical lens includes a first lens, a second lens, a third lens, and a fourth lens sequentially arranged from a light exit side to a light incident side. Refractive powers of the first lens, the second lens, the third lens and the fourth lens are sequentially positive, negative, positive and positive. An image generator is disposed at the light incident side. The optical lens is configured to receive an image beam provided by the image generator. The image beam forms a stop at the light exit side. The stop has the minimum cross-sectional area of beam convergence of the image beam. The optical lens and the head-mounted display device of the disclosure have advantages of smaller size, light weight, large viewing angle and high resolution.

Abstract: A near-eye light field display device includes a display element, a microlens array and an optical element. The display element has a plurality of micro-image units and each of the plurality of micro-image units is configured to provide an elemental image beam. The microlens array is disposed in front of the display element and has a plurality of microlenses corresponding to the plurality of the micro-image units respectively. The optical element is disposed in front of the microlens array and located on a transmission path of the elemental image beams from the microlenses. An Abbe number of the microlens array is VdMLA, a refractive index of the microlens array is ndMLA, an Abbe number of the optical element is VdOE, a refractive index of the optical element is ndOE, and the microlens array and the optical element meet at least one of: VdOE>VdMLA and ndOE<ndMLA.

Abstract: A light field display apparatus and a method for calibrating a display image thereof are provided. The method for calibrating a display image includes: dividing a display image to generate a plurality of block images; displaying the block images by a display, and passing the block images through a light field device to generate a combination image; providing an image capturer to capture the combination image, and comparing the display image and the combination image to generate error information; receiving user parameters; and adjusting at least one of the block images in the display image according to the user parameters and the error information. Without providing a mechanical adjustment device, the light field display apparatus of the invention can compensate for display errors that may be caused by the device-internal parameters and the user parameters, which not only enhances display quality, but also enhances convenience in use.

Abstract: A display device includes a light source module and a display panel that is disposed relative to the light source module. The light source module includes a substrate, a plurality of light emitting dies, an encapsulation layer, and a plurality of reflection patterns. The substrate has a bearing surface, the light emitting dies are disposed on the bearing surface of the substrate. The encapsulation layer covers the bearing surface and the plurality of light emitting dies. The encapsulation layer includes a light emitting surface away from the bearing surface, a bottom surface connected to the bearing surface and at least one light guide side surface. The at least one light guide side surface connected to the light emitting surface, and is inclined with respect to the light emitting surface. The plurality of reflection patterns is respectively disposed in the plurality of reflecting recesses.

Abstract: A near-eye display device including a display panel, a liquid crystal layer, and a lens element is provided. The liquid crystal layer is disposed adjacent to the display panel and disposed between the display panel and the lens element. The display panel is configured to provide an image light beam to pass through the liquid crystal layer. At least a portion of the liquid crystal layer is configured to modulate the image light beam according to the phase modulation. Phase modulation occurs to at least a portion of the liquid crystal layer to modulate the image light beam, and the lens element is a micro lens array.

Abstract: A head-mounted display apparatus including a light source module, an optical adjustment element, a display module and a lens element is provided. The light source module provides an illumination beam. The optical adjustment element and the display module are disposed on a transmission path of the illumination beam, and the display module is configured to convert the illumination beam into an image beam. The optical adjustment element is located between the light source module and the display module. The lens element is disposed on a transmission path of the image beam, wherein a transmission direction of the maximum light-emitting intensity of the illumination beam transmitted from the light source module to the optical adjustment element is different to a transmission direction of the maximum light-emitting intensity of the illumination beam transmitted from the optical adjustment element to the display module.

Abstract: A near-eye display apparatus including a display and a lens element is provided. The display has a light-exiting surface. The lens element is located in front of the light-exiting surface of the display and includes N ring-shaped lens arrays, wherein N is a positive integer greater than 1, and the N ring-shaped lens arrays have a central axis. Each of the N ring-shaped lens arrays includes a plurality of lens units. No step difference exists between any two adjacent lens units in the same ring-shaped lens array. In an i-th ring-shaped lens array, the total number of the lens units is related to a location of at least one of the lens units and related to a pitch of the lens units, and i=1 to N. The near-eye display apparatus has good image quality, is easy to be assembled, and may be formed through a simplified manufacturing process.

Abstract: A near-eye display apparatus is configured to be disposed in front of at least one eye of a user and includes an illumination system, a display device, and a micro-lens array. The illumination system is configured to provide an illumination beam including sub-illumination beams. The display device is located on a transmission path of the illumination beam. The sub-illumination beams form corresponding sub-illumination regions on the display device, and the display device is configured to convert the sub-illumination beams irradiating the display device and corresponding to the sub-illumination regions into sub-image beams. An exit angle of each sub-image beam emitted from the display device is less than or equal to 20 degrees. The near-eye display apparatus provided herein is capable of eliminating stray light and characterized by good quality.

Abstract: A variable focal length optical element including a first substrate, at least one piezoelectric thin film, a reflection layer and multiple driving electrodes is provided. The first substrate has a first chamber. The at least one piezoelectric thin film is located on the first substrate. The reflection layer is located on a surface of the at least one piezoelectric thin film. The driving electrodes are located on the first substrate, and surround the first chamber. The at least one piezoelectric thin film is respectively driven by the corresponding driving electrodes, and each driving electrode respectively applies a driving voltage to the at least one piezoelectric thin film to deform the at least one piezoelectric thin film. The at least one piezoelectric thin film is adapted to effectively maintain optical quality of the variable focal length optical element under different environmental conditions, and avails improving reliability thereof.

Abstract: An optical lens includes a first lens group and a second lens group. The first lens group includes a first lens, a second lens, and a third lens arranged in sequence from a magnified side towards a reduced side. Refractive powers of the first lens, the second lens, and the third lens are negative, negative and positive respectively. The third lens is a glass lens. The second lens group is disposed between the first lens group and the reduced side. The second lens group includes a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the magnified side towards the reduced side. Refractive powers of the fourth lens, the fifth lens, and the sixth lens are positive, negative and positive respectively. The first lens, the second lens, the fourth lens, the fifth lens and the sixth lens are plastic lenses.

Abstract: A display device includes a light source, a light-directing element, a reflective display element, and a microlens array. The light-directing element is disposed on the transmission path of a lighting beam provided by the light source for projecting the lighting beam toward the first direction. The reflective display element includes a plurality of micro-image units, wherein each micro-image unit converts the lighting beam projected from the light-directing element into an sub-image beam and reflects the sub-image beam. The microlens array is disposed on the transmission path of the sub-image beams, wherein the light-directing element is located between the microlens array and the reflective display element. The microlens array includes a plurality of microlenses. Each sub-image beam pass throughs the light-directing element and is projected to an aperture by the corresponding microlens, and the sub-image beams pass through the aperture to form an image beam.

Abstract: A display apparatus includes a display device and an optical element. The display device is configured to project an image beam to a first diaphragm. The optical element is disposed on the transmission path of the image beam. The optical element includes a second diaphragm, the second diaphragm is located on one side of the first diaphragm, and the first diaphragm is located between the second diaphragm and the display device. The area of the second diaphragm approximates the area of the first diaphragm. The image beam passes through the first diaphragm and the second diaphragm and is projected to a projection target.

Abstract: A display device includes a light source, a light-directing element, a first lens, a microlens array, and a reflective display element. The light-directing element is adapted to project a lighting beam provided by the light source toward an incident direction. The first lens is configured to receive the lighting beam projected by the light-directing element and project the lighting beam toward the incident direction. The first lens is located between the microlens array and the light-directing element. The micro-image units of the reflective display element correspond to the microlenses of the microlens array respectively. Each micro-image unit converts the lighting beam into an sub-image beam and reflect the sub-image beam to the microlens array. Each sub-image beam is projected to the first lens by the corresponding microlens, and the sub-image beams pass through the light-directing element and transmit to an aperture to form an image beam.

Abstract: A near-eye light field display device includes a display element, a microlens array and an optical element. The display element has a plurality of micro-image units and each of the plurality of micro-image units is configured to provide an elemental image beam. The microlens array is disposed in front of the display element and has a plurality of microlenses corresponding to the plurality of the micro-image units respectively. The optical element is disposed in front of the microlens array and located on a transmission path of the elemental image beams from the microlenses. An Abbe number of the microlens array is VdMLA, a refractive index of the microlens array is ndML,A, an Abbe number of the optical element is VdOE, a refractive index of the optical element is ndOE, and the microlens array and the optical element meet at least one of: VdOE>VdMLA and ndOE<ndMLA.

Abstract: A near-eye display apparatus including a display and a lens element is provided. The display has a light-exiting surface. The lens element is located in front of the light-exiting surface of the display and includes N ring-shaped lens arrays, wherein N is a positive integer greater than 1, and the N ring-shaped lens arrays have a central axis. Each of the N ring-shaped lens arrays includes a plurality of lens units. No step difference exists between any two adjacent lens units in the same ring-shaped lens array. In an i-th ring-shaped lens array, the total number of the lens units is related to a location of at least one of the lens units and related to a pitch of the lens units, and i=1 to N. The near-eye display apparatus has good image quality, is easy to be assembled, and may be formed through a simplified manufacturing process.

Abstract: An optical element configured to allow an image beam passing through is provided. The optical element includes a first and a second birefringent layer and a gas layer between the first and the second birefringent layer. An extension direction of the gas layer is inclined with respect to an extension direction of the optical element, wherein the image beam passes through the first birefringent layer, the gas layer and the second birefringent layer in sequence. A first and a second sub image beam having different deflection angles are generated from the image beam when the image beam enters the gas layer. After the first and the second sub image beam are emitted from the second birefringent layer, a transmission path of the first and the second sub image beam are offset from each other by an offset distance, thereby improving resolution of an image to be viewed.