Abstract: A light source module includes a light source, a fluorescent ring, a reflector, and a driving device. The light source is configured to emit light. The fluorescent ring has an inner surface. The reflector is configured to reflect the light to form a light spot on the inner surface. The driving device is configured to rotate the reflector to cause the light spot to move along a circular path on the inner surface.

Abstract: A light source module includes a light source, a fluorescent ring, a reflector, and a driving device. The light source is configured to emit light. The fluorescent ring has an inner surface. The reflector is configured to reflect the light to form a light spot on the inner surface. The driving device is configured to rotate the reflector to cause the light spot to move along a circular path on the inner surface.

Abstract: A circuit board includes a first circuit area, a first processing unit and a conductive pattern. The first circuit area includes a plurality of first electrically contacts. The first processing unit, which includes a ball grid array (BGA) substrate, is disposed on the first circuit area and is electrically connected to the first electrically contacts. The BGA substrate has a plurality of solder balls and a bypass circuit. The conductive pattern is electrically connected to the first electrically contacts.

Abstract: An image control device and an image displaying system comprising the same are provided. The image control device co-operates with a displaying device of the image displaying system. When a proximity sensor of the image control device senses proximity of a user, it generates a three-dimensional image activation signal for informing the displaying device to play a three-dimensional image so that the user can watch the three-dimensional image through three-dimensional image filter units of the image control device. When the proximity sensor of the image control device senses the leaving of the user, it generates a three-dimensional image ending signal for informing the displaying device to stop displaying the three-dimensional image.

Abstract: A circuit board includes a first circuit area, a first processing unit and a conductive pattern. The first circuit area includes a plurality of first electrically contacts. The first processing unit, which includes a ball grid array (BGA) substrate, is disposed on the first circuit area and is electrically connected to the first electrically contacts. The BGA substrate has a plurality of solder balls and a bypass circuit. The conductive pattern is electrically connected to the first electrically contacts.

Abstract: A projector. A lamp serves as a light source for the projector. A starter turns on the lamp. An image processing system generates a projected image according to a video signal. A CPU controls the image processing system. A plurality of cooling fans positioned at least near the power supply, the lamp, or the image processing system to reduce the temperature around the cooling fans and respectively generating pulse signals corresponding to the rotational speed of the cooling fan. A charging circuit generates a continuous charging signal and generates a protection active signal to reset the CPU, shut down the power supply or the lamp.

Abstract: A projector. A lamp serves as a light source for the projector. A starter turns on the lamp. An image processing system generates a projected image according to a video signal. A CPU controls the image processing system. A plurality of cooling fans positioned at least near the power supply, the lamp, or the image processing system to reduce the temperature around the cooling fans and respectively generating pulse signals corresponding to the rotational speed of the cooling fan. A charging circuit generates a continuous charging signal and generates a protection active signal to reset the CPU, shut down the power supply or the lamp.