Abstract: A heat dissipation device of a projector for transmitting the heat from a lamp out of the projector, the heat dissipation device comprises a fan, a diversion duct, and a division vane. The diversion duct is used for changing the direction of the air flow that generated by the fan to a second direction from a first direction; and the division vane is disposed within the diversion duct for splitting the air flow to discharge the air flow with uniform distributing heat off the diversion duct.

Abstract: A lamp position adjustment device includes a bottom frame, a lamp holder, and a lamp mount. The lamp holder is disposed on the bottom frame for supporting the lamp, and the lamp mount is disposed between the lamp holder and the bottom frame. The lamp mount includes a base portion, a first side portion and a second side portion that are respectively connected to two opposite sides of the base portion, a first positioning mechanism, and a second positioning mechanism. The first positioning mechanism is disposed on the base portion to enable the lamp mount to be slidably connected to the bottom frame, and the second positioning mechanism is disposed on the first side portion and the second side portion to enable the lamp mount to be slidably connected to the lamp holder.

Abstract: A method for forming a periodic structure is disclosed. A structural layer and an optical modulation element are provided. A light is emitted to pass through the optical modulation element to irradiate interference strips on the structural layer. A photoelectrochemical etching (PEC) is performed to form the periodic structure according the interference strips irradiated on the structural layer.

Abstract: A handle mechanism is adapted to a projector having a case. The handle mechanism has a frame, a rod, a grip, a positioning element, and an elastic element. The frame is connected to the case and has a through hole. The rod penetrates through the through hole and is capable of moving relatively to the frame. The rod has a first end, a second end, an anchor portion at the first end thereof, a first positioning portion, and a second positioning portion. The grip is connected to the second end of the rod, wherein the anchor portions limit a movement range of the grip relative to the rods and the frame. The positioning element is located between the frame and the rod. The elastic element is located between the frame and the positioning element, and forces the positioning element to physically interfere with the first or the second positioning portion.

Abstract: The invention provides a light-emitting device, comprising a light-emitting element and a surface plasmon coupling element connected to the light-emitting element. In an embodiment of the invention, the surface plasmon coupling element comprises a dielectric layer connected to the light-emitting element and a metal layer on the dielectric layer. In another embodiment of the invention, the light-emitting device is a light-emitting diode, comprising an active layer between an n-type semiconductor layer and a p-type semiconductor layer, and a surface plasmon coupling element adjacent to the n-type semiconductor layer. In a further embodiment of the invention, a current spreading layer on a second type semiconductor layer of the light-emitting device includes a plurality of strip-shaped structures, and the surface plasmon coupling element is disposed on the current spreading layer and filled into the gap between the strip-shaped structures of the current spreading layer.

Abstract: Measurement system and methods for measuring oxygenated hemoglobin saturation level are provided. Light is transmitted to test blood and a reference mirror. The reference mirror provides a first reflected light beam, and backscattered light from different depths of the test blood generates a second reflected light beam. An interfered light signal is generated by light interference of the first and second reflected light beams. According to the interfered light signal, a first light decay constant for a first light wavelength range and a second light decay constant for a second light wavelength range are obtained according to the interfered light signal. A decay ratio of the first light decay constant to the second light decay constant is obtained. Oxygenated hemoglobin saturation level of the test blood is obtained according to the decay ratio.

Abstract: A producing method of poly-wavelength light-emitting diode of utilizing nano-crystals and the light-emitting device thereof includes growing and processing a multiple-quantum-well layer based on stacking the mixture of at least two kinds of quantum wells to produce a two-wavelength light-emitting diode. Then, attaching nano-crystals on the two-wavelength light-emitting diode to transfer one of the wavelengths of the two-wavelength light-emitting diode to produce a poly-wavelength light-emitting diode. The device of the present invention can emit blue, green and red lights to produce white light.

Abstract: A lamp module includes a lamp unit, a mounting seat, and a positioning unit. The lamp unit includes a lamp cup having a cup opening, and a lampwick disposed in the lamp cup. The lamp cup further has a flange that extends outwardly from a peripheral edge defining the cup opening. The mounting seat includes front and rear sides, and has a seat hole extending through the front and rear sides, and facing the cup opening. The flange is disposed to abut against the rear side. The positioning unit includes a body portion coupled to the mounting seat, and a plurality of clip portions connected to the body portion and abutting against the lamp cup. The clip portions include at least one first clip portion extending and bending from the body portion into a V shape and having a pressing end which abuts against the flange.

Abstract: A method and structure for manufacturing long-wavelength visible light-emitting diode (LED) using the prestrained growth effect comprises the following steps: Growing a strained low-indium-content InGaN layer on the N-type GaN layer, and then growing a high-indium-content InGaN/GaN single- or multiple-quantum-well light-emitting structure on the low-indium-content InGaN layer to enhance the indium content of the high-indium quantum wells and hence to elongate the emission wavelength of the LED. The method of the invention can elongate emission wavelength of the LED by more than 50 nm (nanometer) such that an originally designated green LED can emit red light or orange light without influencing other electrical properties.

Abstract: A projection apparatus including a projection unit, a control unit, a case, and a movable signal receiving module is provided. The projection unit is suitable to project an image beam onto a screen. The control unit is electrically connected to the projection unit, and the control unit is suitable to control the projection unit. The projection unit and the control unit are packaged by the case. In addition, the movable signal receiving module disposed outside the case includes a signal receiving unit and a signal transmission line. The signal receiving unit is suitable to receive a signal from a remote controller. One end of the signal transmission line is connected to the signal receiving unit and the other end is suitable to be electrically connected to the control unit. Moreover, the signal received by the signal receiving unit is transmitted to the control unit through the signal transmission line.

Abstract: A method for controlling the color contrast of a multi-wavelength light-emitting diode (LED) made according to the present invention is disclosed. The present invention includes at least the step of increasing the junction temperature of a multi-quantum-well LED, such that holes are distributed in a deeper quantum-well layer of the LED to increase luminous intensity of the deeper quantum-well layer, thereby controlling the relative intensity ratios of the multiple wavelengths emitted by the LED. The step of increasing junction temperature of the multi-quantum-well LED is achieved either by controlling resistance through modulating thickness of a p-type electrode layer of the LED or by modifying the mesa area size to control its relative heat radiation surface area.

Abstract: An outer suspension type lens shielding mask for a projection apparatus including a sheet body and holding element, in which a rectangular hole is opened in the sheet body, and the sheet body is combined with the holding element to be fixed on a projection apparatus. Another outer suspension type lens shielding mask includes a base plate, in which a rectangular hole is opened in the middle part thereof, and upper and lower adjustable plates are installed behind the base plate. An open rectangular notch is respectively disposed at the middle parts of the upper and the lower adjustable plates. An adjustment mechanism includes a plurality of connecting elements connected to the base plate and the upper and the lower adjustable plates for adjusting the relative positions thereof, to avoid bad shadows yielded outside of a picture due to light diffraction and improve the quality of visual amusement.

Abstract: A lens device includes a lens unit that is connected fixedly to a coupling ring disposed coaxially in and coupled axially and movably to a hollow tubular body of a lens seat. A radially extending engaging stub of the coupling ring engages movably with a slot that is formed in the tubular body and that extends in an axial direction of the lens seat, and engages movably with a curved guiding groove in an operating sleeve sleeved rotatably on the tubular body. Movement of the engaging stub along the guiding groove in the operating sleeve in response to rotation of the operating sleeve relative to the tubular body causes the engaging stub on the coupling ring to move along the slot in the tubular body in the axial direction, thereby adjusting the lens unit to a desired focusing position.

Abstract: An outer suspension type lens shielding mask for a projection apparatus including a sheet body and holding element, in which a rectangular hole is opened in the sheet body, and the sheet body is combined with the holding element to be fixed on a projection apparatus. Another outer suspension type lens shielding mask includes a base plate, in which a rectangular hole is opened in the middle part thereof, and upper and lower adjustable plates are installed behind the base plate. An open rectangular notch is respectively disposed at the middle parts of the upper and the lower adjustable plates. An adjustment mechanism includes a plurality of connecting elements connected to the base plate and the upper and the lower adjustable plates for adjusting the relative positions thereof, to avoid bad shadows yielded outside of a picture due to light diffraction and improve the quality of visual amusement.

Abstract: A wall hanging apparatus for a projection apparatus comprises a fixing seat installed at the lower surface of the projection apparatus, supporting arm whose lower end is fixed on the surface of the fixing seat and reflection mirror fixed at the upper end of the supporting arm and corresponded to a projection lens of the projection apparatus. Whereby, the projection apparatus can have both the portability of a prone type projection apparatus and space saving characteristic of a ceiling hanging type projection apparatus and can be used in an indoor space with a lower height to allow the usage of the projection apparatus is diversified. And, a trapezoid deformation of an image caused from the deviation of the angle of incidence can be modified effectively and quickly by adjusting the angle of the reflection mirror.

Abstract: A projector having an optical engine module is disclosed. The projector has an optical engine module, a lamp module, and a fan and is disposed on the substrate. The lamp module is used for generating a light beam and reflecting the light beam to the optical engine module. The optical engine module comprises an invisible light filter, a color wheel, a light valve, and a projection lens. The fan is used for generating airflow to the lamp module.

Abstract: A heat dissipation device of a projector for transmitting the heat from a lamp out of the projector, the heat dissipation device comprises a fan, a diversion duct, and a division vane. The diversion duct is used for changing the direction of the air flow that generated by the fan to a second direction from a first direction; and the division vane is disposed within the diversion duct for splitting the air flow to discharge the air flow with uniform distributing heat off the diversion duct.

Abstract: An outer suspension type lens shielding mask for a projection apparatus includes a sheet body and a holding element, in which a rectangular hole is opened in the sheet body. The sheet body is combined with the holding element together for being fixed on a projection apparatus. Another outer suspension type lens shielding mask has a base plate, in which a rectangular hole is opened in the middle part thereof, upper and lower adjustable plates, installed behind the base plate and an open rectangular notch is respectively disposed at the middle parts of the upper and the lower adjustable plates, and an adjustment mechanism, including a plurality of connecting elements connected to the base plate and the upper and the lower adjustable plates for adjusting the relative positions of the upper and the lower adjustable plates on the base plate.

Abstract: A projection apparatus includes a casing having a first surface, a modular device having a second surface, and a tongue member complementing with the first surface and protruding outwardly from the second surface. The tongue member has an approximate section and a distal section with a cross-section greater than a cross-section of the approximate section. A U-shaped resilient member has a lower portion fixed securely on the first surface of the casing, and an upper portion defining an entrance with a width smaller than a width of the distal section of the tongue member. The distal section of the tongue member is inserted into the U-shaped resilient member via the entrance so as to mount the second surface of the modular device on the first surface of the casing.

Abstract: A projection lens set shifting apparatus includes a gear train, adjusting shaft and projection lens set, wherein an eccentric wheel is fixed on an output shaft of the gear train and a notch is opened at the circumference of the eccentric wheel. An eccentric pin is fixed at one end of the adjusting shaft. The eccentric pin in the notch connects the adjusting shaft and the gear train. The projection lens set is moved up and down along the adjusting shaft by rotating the gear train to drive the adjusting shaft, thus cause an image focusing location to be moved with the projection lens set and shifted up and down on a screen. Therefore, an image projection location can be changed and the image deformation is not yielded. Besides, a gap between the notch and the eccentric pin absorbs a production tolerance.