Abstract: A light detection circuit for a projector is provided. The light detection circuit includes: a light transistor for receiving and sensing reflected light from a side of a color wheel driving motor of the projector, wherein the side of the color wheel driving motor includes a dark region and a bright region; a bias unit coupled to the light transistor for providing a bias voltage; an operation amplifier including a positive input coupled to the bias unit, a negative input coupled to the light transistor and the bias unit, and an output, the base unit providing the bias voltage to the positive input; and a feedback resistor coupled between the negative input of the operation amplifier and the output, wherein, a resistance of the feedback resistor causes the light transistor to be operated in a linear region.

Abstract: A projector including a projector body and a positioning member is provided. The projector body is used to project a picture. The positioning member is slidably disposed on the projector body and has a scale used to keep the projector body and the projection target at a predetermined distance. The projector body projects a picture with a specific size according to the predetermined distance.

Abstract: A smart content template recommendation system including a content editing device, a content management system, at least one content playing device is provided. The content editing device is for a user to edit a client content. The content management system is coupled to the content editing device to receive and analyze the client content uploaded from the content editing device to recommend a target content template. The at least one content playing device is coupled to the content management system to play the target content template recommended by the content management system.

Abstract: A method for avoiding an image sticking effect includes acquiring a color tone status of an image during a predetermined time interval according to an input signal of a liquid crystal display panel, rotating pixel molecules of at least one region of a plurality of regions of the image by using a pixel inversion process when the color tone status is maintained at a steady state, and after the pixel molecules of the at least one region of the image are rotated, suspending the pixel inversion process of the image when the color tone status is changed from the steady state to an unstable state.

Abstract: A display device includes a housing and a bracket stand module. The housing has a first accommodating recess. The bracket stand module includes an adapter, a pivot connecting member and a rotating member. The adapter has a second accommodating recess, and is located and fixed in the first accommodating recess. The rotating member is pivotally connected to the pivot connecting member to rotate relative to the pivot connecting member, and is located and fixed in the second accommodating recess.

Abstract: A multifunctional holder is provided for supporting a first object and a second object. The multifunctional holder includes a backboard assembly, an adapter, at least one movable arm and a positioning member. The backboard assembly is disposed on a back side of the first object. The adapter is connected to the backboard assembly. The at least one movable arm is connected to the adapter, wherein a first degree of rotational freedom is provided between the backboard assembly and the adapter, and a second degree of rotational freedom is provided between the adapter and the at least one movable arm. The positioning member is disposed on the backboard assembly or the adapter for fixing the second object.

Abstract: A projection system includes a light source, a projection lens, and a light-adjusting diaphragm element. The light source emits a first light having a first dominant wavelength range and a second dominant wavelength range. The projection lens is disposed on the path of the first light. The light-adjusting diaphragm element, disposed between the light source and the projection lens, has an opening and a light shielding area outside the opening, a filter is disposed in the opening, wherein a part of the first light is blocked by the light shielding area, a wavelength band corresponding to the first dominant wavelength range of other part of the first light passes through the opening, and a wavelength band corresponding to the second dominant wavelength range of the other part of the first light is blocked by the filter to become a second light having a narrow wavelength range.

Abstract: A display device includes a housing and a bracket stand module. The housing has a first accommodating recess. The bracket stand module includes an adapter, a pivot connecting member and a rotating member. The adapter has a second accommodating recess, and is located and fixed in the first accommodating recess. The rotating member is pivotally connected to the pivot connecting member to rotate relative to the pivot connecting member, and is located and fixed in the second accommodating recess.

Abstract: A projector and a projecting method using the same are provided. The projector includes a first light source, a color wheel and a second light source. The first light source is configured to emit a first color light. The second light source is configured to emit a second color light. The first color light passing through a transparent region of the color wheel becomes a third color light. The second color light and the third color light are mixed as a first projecting light. The first color light reflected by a phosphor reflection region of the color wheel becomes a fourth color light. The fourth color light is guided toward a projecting direction to become a second projecting light. The first projecting light and the second projecting light do not overlap in timing.

Abstract: An input device, a mouse using the same and a method using the same are provided. The input device capable of avoiding error action of a switch includes a first g diode, a second diode and a switch. The second diode is electrically connected to the first diode. The switch is electrically connected to between the first diode and the second diode.