Abstract: A projection light source system includes a laser light source, a fluorescence wheel, a color wheel, and a light guide assembly. The fluorescence wheel includes a yellow fluorescence area, a green fluorescence area, and a blue fluorescence area. The yellow fluorescence area, the green fluorescence area, and the blue fluorescence area are configured to receive excitation light in time sharing, and generate fluorescence of different colors according to the excitation light. The yellow fluorescence area is configured to generate yellow fluorescence, the green fluorescence area is configured to generate green fluorescence, and the blue fluorescence area is configured to generate blue fluorescence. The color wheel is configured to receive the fluorescence and output red light, green light, and blue light in sequence to form light in three basic colors. The light guide assembly is located on a light path of the excitation light and the fluorescence.

Abstract: A device as a light-emitting for a projector. The projector includes a light-emitting module and a first lens array positioned at one side. The first lens array includes a number of first lenses arranged in parallel along a first direction. The first lens array is configured to receive source light. A second lens array is positioned at a side of the first lens array. The second lens array includes a number of second lenses arranged in parallel along a second direction. The second lens array receives first collimated light from the first lenses and emits second collimated light which is of even light-spot density and uniform brightness.

Abstract: A heat dissipation structure capable of holding different components at different temperatures within one housing includes at least first and second elements, a refrigerator, and a heat dissipation device. The refrigerator is positioned adjacent to the first element. The refrigerator forms a first heat dissipation channel to dissipate heat from the first element requiring a first target temperature. The dissipation device forms a second heat dissipation channel to dissipate heat from the second element requiring a second target temperature, the first target temperature being higher than the second target temperature.

Abstract: A heat dissipation structure capable of holding different components at different temperatures within one housing includes at least first and second elements, a refrigerator, and a heat dissipation device. The refrigerator is positioned adjacent to the first element. The refrigerator forms a first heat dissipation channel to dissipate heat from the first element requiring a first target temperature. The dissipation device forms a second heat dissipation channel to dissipate heat from the second element requiring a second target temperature, the first target temperature being higher than the second target temperature.

Abstract: A device as a light-emitting for a projector. The projector includes a light-emitting module and a first lens array positioned at one side. The first lens array includes a number of first lenses arranged in parallel along a first direction. The first lens array is configured to receive source light. A second lens array is positioned at a side of the first lens array. The second lens array includes a number of second lenses arranged in parallel along a second direction. The second lens array receives first collimated light from the first lenses and emits second collimated light which is of even light-spot density and uniform brightness.

Abstract: A light engine includes a light source module, an optical assembly, a collimating lens, and a reflecting lens. The optical assembly includes a light inlet and a light outlet communicating with the light inlet. The light source module is connected to the light inlet. The collimating lens is connected to the light outlet. The reflecting lens includes a concave surface, and the concave surface faces the collimating lens.

Abstract: A light engine includes a light source module, an optical assembly, a collimating lens, and a reflecting lens. The optical assembly includes a light inlet and a light outlet communicating with the light inlet. The light source module is connected to the light inlet. The collimating lens is connected to the light outlet. The reflecting lens includes a concave surface, and the concave surface faces the collimating lens.

Abstract: A cooling device for projector includes a shell, a circuit board, a light machine, a first fins, a fan assembly and a heat dissipation module. The light machine is mounted on the circuit board, and includes a light source having a red LED, a green LED facing the red LED, and a blue LED positioned between both of them. The first fins are mounted on the light source adjacent to the blue LED. The fan assembly includes a fan having a fan shell with an inlet and an outlet, and a second fins connected to the light source to aligned with the red LED. The heat dissipation module includes a third fins mounted on the light source to align to the green LED, a fourth fins mounted on the fan shell to align to the outlet of the fan, and a heat pipe interconnecting the third and fourth fins.

Abstract: A projector includes a housing, a projection lens, a receiving member, an optical engine, a light source module, a heat sink, and a fan. The housing includes a bottom wall and four sidewalls, the bottom wall and the four sidewalls together define a receiving space. One of the sidewalls a number of first vents, the other three sidewalls define a number of second vents. The projection lens is located at an intersecting corner of the sidewalls. The receiving member includes a first receiving portion and a second receiving portion. The optical engine is received in the second receiving portion. The light source module is received in the first receiving portion. The heat sink is located at an intersecting corner of the sidewalls. The fan is located at an intersecting corner of the sidewalls.

Abstract: A cooling device for projector includes a shell, a circuit board, a light machine, a first fins, a fan assembly and a heat dissipation module. The light machine is mounted on the circuit board, and includes a light source having a red LED, a green LED facing the red LED, and a blue LED positioned between both of them. The first fins are mounted on the light source adjacent to the blue LED. The fan assembly includes a fan having a fan shell with an inlet and an outlet, and a second fins connected to the light source to aligned with the red LED. The heat dissipation module includes a third fins mounted on the light source to align to the green LED, a fourth fins mounted on the fan shell to align to the outlet of the fan, and a heat pipe interconnecting the third and fourth fins.

Abstract: A locking structure of a housing for a portable electronic device is disclosed. The housing defines an opening therein. The locking structure includes an engagement-receiving member, a bended rod, and a securing member. The engagement-receiving member is fixed to the housing so as to partially seal the opening but leave a rod entrance between the engagement-receiving member and the housing. The engagement-receiving member defines two rod-bearing portion at the rod entrance. The bended rod includes two distal shaft portions and a mesial swinging portion. The two distal shaft portions are borne by the rod-bearing portions respectively. The swinging potion is received in the opening and is capable of swinging out from the opening. The securing member is shaped so as to tightly fit into the entrance, thereby securing the bended rod to the engagement-receiving member.

Abstract: A system (100) for monitoring a motor (202) includes a potential-detecting module (102), a potential-comparing module (104) and a motor-monitoring module (106). The potential-detecting module is configured for measuring output potential of the motor before operation of the motor, and measuring output potential during operation of the motor so as to determine a first output potential and a second output potential. The potential-comparing module is configured for comparing the first output potential with the second output potential to determine whether the motor is operating normally. The motor-monitoring module is configured for selecting a monitoring type if the motor is operating normally. A method for monitoring a motor is also provided.

Abstract: A projector includes a housing, a projection lens, a receiving member, an optical engine, a light source module, a heat sink, and a fan. The housing includes a bottom wall and four sidewalls, the bottom wall and the four sidewalls together define a receiving space. One of the sidewalls a number of first vents, the other three sidewalls define a number of second vents. The projection lens is located at an intersecting corner of the sidewalls. The receiving member includes a first receiving portion and a second receiving portion. The optical engine is received in the second receiving portion. The light source module is received in the first receiving portion. The heat sink is located at an intersecting corner of the sidewalls. The fan is located at an intersecting corner of the sidewalls.

Abstract: A locking structure of a housing for a portable electronic device is disclosed. The housing defines an opening therein. The locking structure includes an engagement-receiving member, a bended rod, and a securing member. The engagement-receiving member is fixed to the housing so as to partially seal the opening but leave a rod entrance between the engagement-receiving member and the housing. The engagement-receiving member defines two rod-bearing portion at the rod entrance. The bended rod includes two distal shaft portions and a mesial swinging portion. The two distal shaft portions are borne by the rod-bearing portions respectively. The swinging potion is received in the opening and is capable of swinging out from the opening. The securing member is shaped so as to tightly fit into the entrance, thereby securing the bended rod to the engagement-receiving member.

Abstract: A system for protecting an electronic devices includes a memory unit, a reading unit, a judging unit, an extra action unit, and a writing unit. The memory unit is configured for storing a variable, the variable having a first value representing the last power off of the electronic device being abnormal and a second value representing the last power off of the electronic device being normal. The reading unit is configured for reading the variable stored in the memory unit in the power-on process of the electronic device. The judging unit is configured for judging whether the last power off of the electronic device is abnormal according to the value of the variable. The extra action unit is configured for protecting the electronic device by executing an extra action, if the last power off of the electronic device was abnormal. The writing unit is used for changing the variable.

Abstract: A system (100) for monitoring a motor (202) includes a potential-detecting module (102), a potential-comparing module (104) and a motor-monitoring module (106). The potential-detecting module is configured for measuring output potential of the motor before operation of the motor, and measuring output potential during operation of the motor so as to determine a first output potential and a second output potential. The potential-comparing module is configured for comparing the first output potential with the second output potential to determine whether the motor is operating normally. The motor-monitoring module is configured for selecting a monitoring type if the motor is operating normally. A method for monitoring a motor is also provided.