摘要:
A light source control method and a light source control device are used for controlling a light source. The light source control device includes a position detecting sensor and a microcontroller. The light source control method includes steps of generating a first signal according to an object touching a position of the position detecting sensor, and generating a control signal according to a light source adjustable parameter set corresponding to the first signal for controlling an illuminating status of the light source. The light source adjustable parameter set includes a plurality of color value components. The control signal is generated by the microcontroller according to the color value components.
摘要:
In a feedback circuit of a power supply, an electrical level of an output voltage is stabilized corresponding to changes of an electrical level of a pulse width modulation signal, and effects, which are caused by spikes, on passive elements are decreased to a lowest degree. The electrical level of the output voltage is stabilized by storing a voltage corresponding to a low-to-high electrical level of the PWM signal with a capacitor, by discharging the stored voltage with a high-to-low electrical level of said PWM signal, and by regulating a discharging path of the stored voltage with a diode, which is not conducted. The abovementioned disposition may be utilized on various power-consuming devices, a duty cycle of each of which is controlled with a PWM signal, for stabilizing output voltages of said power-consuming devices, and for reducing effects, which are caused by spikes, on passive elements inside said power-consuming devices.
摘要:
In a feedback circuit of a power supply, an electrical level of an output voltage is stabilized corresponding to changes of an electrical level of a pulse width modulation signal, and effects, which are caused by spikes, on passive elements are decreased to a lowest degree. The electrical level of the output voltage is stabilized by storing a voltage corresponding to a low-to-high electrical level of the PWM signal with a capacitor, by discharging the stored voltage with a high-to-low electrical level of said PWM signal, and by regulating a discharging path of the stored voltage with a diode, which is not conducted. The abovementioned disposition may be utilized on various power-consuming devices, a duty cycle of each of which is controlled with a PWM signal, for stabilizing output voltages of said power-consuming devices, and for reducing effects, which are caused by spikes, on passive elements inside said power-consuming devices.
摘要:
A liquid crystal display module and an integrated driving board thereof are disclosed. The driving board includes a substrate, a circuit pattern, a timing clock driver, a light emitting diode (LED) driving module, a color management module and a photosensitive chip. The circuit pattern is disposed on the surface of the substrate. The timing clock driver, the LED driving module, the color management module and the photosensitive chip are disposed on the substrate and electrically coupled to the circuit pattern. The LED driving module is electrically coupled to the timing clock driver. The color management module is electrically coupled to the LED driving module. The photosensitive chip is electrically coupled to the color management module.
摘要:
A light source driving circuit for a backlight module is disclosed, wherein each driving unit includes a reference resistor, a transistor, a bias resistor and a shunt regulator. The transistor is coupled between an LED string and the reference resistor, and the bias resistor is coupled between an operation voltage and the control terminal of the transistor. The shunt regulator is coupled between the control terminal of the transistor and a common terminal, and the reference pin of the shunt regulator is coupled to the common node between the reference resistor and the transistor.
摘要:
A driving apparatus and a driving method of a backlight module are provided. The backlight module includes multiple LEDs. The driving apparatus includes at least one thermal sensor, an optical sensor, and a processor. The thermal sensor is for detecting a working temperature of the LEDs. The optical sensor is for detecting brightness and color of the backlight module after a calibration function is enabled, to obtain difference values of the detected brightness and color with respect to predetermined brightness and color. The processor is for providing at least one initial thermal compensation table, to determine working currents of the LEDs associated with the working temperature. The processor further is for calibrating a content of the initial thermal compensation table corresponding with a current working temperature of the LEDs and storing the calibrated thermal compensation table as the initial thermal compensation table after the calibration function is enabled.
摘要:
A reflection sensing system comprising a body, an illuming module and a detecting module. The body is made of LCP. The illuming module includes a first accommodating space and an LED, and the detecting module includes a light detector. The first accommodating space is disposed in the body and has a first opening at one end. In the first accommodating space, the neighboring region relative to the first opening is parabolic or approximately parabolic. At an end at an inner side of the first accommodating space near the light detector, at least one cross-section near the first opening is not parabolic or approximately parabolic. The LED is disposed at the focus of the first accommodating space and aligned towards the first opening. The light detector of the detecting module is disposed in the body and generates a sensing signal after receiving light.
摘要:
A light source control method and a light source control device are used for controlling a light source. The light source control device includes a position detecting sensor and a microcontroller. The light source control method includes steps of generating a first signal according to an object touching a position of the position detecting sensor, and generating a control signal according to a light source adjustable parameter set corresponding to the first signal for controlling an illuminating status of the light source. The light source adjustable parameter set includes a plurality of color value components. The control signal is generated by the microcontroller according to the color value components.
摘要:
A surface light source structure having a circuit board, a first light emitting diode (LED) array, and a second LED array is provided. The first and second LED arrays are assembled on the circuit board. Each LED rows of the two LED arrays has a plurality of LED units connected in series. The LED rows of the first LED array are connected in parallel. The LED rows of the second LED array are connected in parallel. The LED rows of the second LED array are intersected between the LED rows of the first LED array. Positive-to-negative directions of the LED units of the first and second LED array are arranged in opposite directions.
摘要:
An anti-aliasing process without sorting the polygons in depth order to improve the image quality in three-dimensional graphics system. This method comprises extra buffer memory than does a typical three-dimensional graphics display system. The Z buffer stores the depth value of nearest pixel in front Z buffer and depth value of secondary nearest pixels in back Z buffer. The color buffer stores foreground color and background color. A weighting value is used and stored in the frame buffer to blend the foreground color and the background nearest color. The weighting value is associated with each pixel, it indicates the percentage of coverage of a pixel. Every pixel in Z buffer test stage will update the depth of the nearest pixel and the depth of the second nearest in Z-buffer, foreground color and background color in the frame buffer and the weighting value according to the result of depth comparison.