Abstract: A medium thickness detection device includes: a light emitting element; a constant-current control circuit controlling, in a constant-current manner, the light emitting element to output light passing through a medium for an irradiation time; a light-receiving element receiving the light passing through the medium to obtain an analog signal; a receiver circuit receiving the analog signal; a maximum holding circuit holding a maximum of the analog signal; an analog-to-digital converter circuit reading the maximum of the analog signal and converting the maximum of the analog signal into a digital signal; a reset circuit resetting the maximum holding circuit; and a processor controlling operations of the constant-current control circuit, the reset circuit and the analog-to-digital converter circuit, and determining a thickness of the medium according to the digital signal when a specification of the medium is unknown.

Abstract: A short pulse generating circuit including a pulse generating circuit, an actuation control circuit and a delay control circuit is provided. The pulse generating circuit is electrically coupled to a switch, which is coupled to a power. When the power is turned on, the power causes the pulse generating circuit to generate a long pulse. The actuation control circuit is electrically coupled to the power and the pulse generating circuit. When the power is turned on, the actuation control circuit controls a voltage level of each output of the pulse generating circuit to a fixed value. The delay control circuit is electrically coupled to the pulse generating circuit. When the switch is turned on, the power controls the delay control circuit to change the voltage level of each output of the pulse generating circuit to generate a short pulse output.

Abstract: A shooting device including a camera lens and a controller is provided. The camera lens is configured to shoot a picture. The controller, electronically coupled to the camera lens, divides the picture into a plurality of initial blocks each corresponding to an initial brightness value, selects at least one selection block from the initial blocks, and calculates an average brightness value according to the initial brightness value corresponding to the at least one selection block.

Abstract: A short pulse generating circuit including a pulse generating circuit, an actuation control circuit and a delay control circuit is provided. The pulse generating circuit is electrically coupled to a switch, which is coupled to a power. When the power is turned on, the power causes the pulse generating circuit to generate a long pulse. The actuation control circuit is electrically coupled to the power and the pulse generating circuit. When the power is turned on, the actuation control circuit controls a voltage level of each output of the pulse generating circuit to a fixed value. The delay control circuit is electrically coupled to the pulse generating circuit. When the switch is turned on, the power controls the delay control circuit to change the voltage level of each output of the pulse generating circuit to generate a short pulse output.

Abstract: A paper tray includes a casing, a lifting mechanism, a weight detector, a storage unit, and a control unit. An accommodating space is formed inside the casing. The lifting mechanism is disposed inside the accommodating space for supporting and lifting at least one sheet of paper. The weight detector is disposed on the lifting mechanism for detecting a weight of the at least one sheet of paper. The storage unit is for storing paper information and a predetermined amount. The control unit is electrically connected to the weight detector and the storage unit. The control unit determines an amount of the at least one sheet of paper according to relation of the weight and the paper information and outputs a supplementary alert to an apparatus for reminding users when the control unit determines the amount of the at least one sheet of paper is less than the predetermined amount.

Abstract: A light source module includes a base, a cold cathode fluorescent lamp (CCFL) and an auxiliary light emitting unit. The CCFL disposed on the base provides main light. The auxiliary light emitting unit disposed on the base includes a plurality of light emitting diodes (LEDs) respectively disposed adjacent to two ends of the CCFL. The auxiliary light emitting unit provides auxiliary light to compensate for the main light, wherein the light source module emits scanning light, which is substantially uniformly distributed along a length of the CCFL.

Abstract: The invention provides an image scanning device and an image scanning method. The image scanning device has an automatic sheet feeding function and is equipped with a detector for detecting a thickness of a sheet. Also, the thickness may serve as a scanning parameter, according to which a scanning speed is adjusted so that the quality of a scanned image can be maintained.

Abstract: An image acquiring device with background filtering function includes a scanning module, a color splitting module and an image processing module. The scanning module includes a CCD sensor for sensing a document image signal travelling along an optical path. The CCD sensor has red, green, blue and white light sensing member sets. A data transmission speed of the white light sensing member set is greater than that of each of the red, green and blue light sensing member sets. The color splitting module disposed on the optical path only lets one of red, green and blue light pass through at a time under a filtering mode. The white light sensing member set receives the red, green or blue light outputted from the color splitting module. Then, the image processing module recognizes a brightness value of a pixel, which exceeds a predetermined value, and compensates for the brightness value of this pixel to generate a brightness value corresponding to a white.