Abstract: An LED lighting system includes a luminescent unit driven by a rectified AC voltage, a dimmer switch configured to adjusting a duty cycle of a system current, and a bleeder circuit. The bleeder circuit includes a first current source, a second current source, a third current source, a current-sensing element for providing a first feedback voltage associated with the system current, a capacitor, and a control unit. The control unit is configured to activate the first current source and deactivate the second current source for charging the capacitor when the system current exceeds a predetermined threshold, deactivate the first current source and activate the second current source for discharging the capacitor when the system current does not exceed the predetermined threshold, and deactivate the third current source to stop supplying the bleeder current according to a second feedback voltage established across the capacitor.

Abstract: An LED lighting device includes at least two luminescent devices, two current sensing elements, and two current regulators. The first and second luminescent device are driven by a rectified AC voltage for providing light according to first current and second current, respectively. The first current sensing element provides a first feedback voltage associated with the first current and the second current sensing element provides a second feedback voltage associated with the second current. The first current regulator provides a first regulating current setting according to the first feedback voltage and a line voltage detection voltage associated with the rectified AC voltage, wherein the waveform of the first regulating current setting follows the waveform of the rectified AC voltage. The second current controller is coupled in parallel to the second luminescent device and provides a constant second regulating current setting according to the second feedback voltage.

Abstract: A traffic light including a plurality of light emitting elements and at least one light guide plate is provided. Each of the light emitting elements is configured to emit a light. The light emitting elements are disposed beside a light entering surface of the at least one light guide plate. Each of the lights enters the at least one light guide plate through the light entering surface of the at least one light guide plate.

Abstract: A display device having an exterior surface and including a back cover, a frame, a display panel and a backlight module is provided. The frame is assembled to the back cover and has a first supporting portion and a second supporting portion. The display panel is disposed in the frame, wherein the first supporting portion supports the display panel. The backlight module is disposed in the frame and located between the back cover and the display panel, wherein the second supporting portion supports the backlight module. The frame has a side surface, and the side surface is a portion of the exterior surface.

Abstract: An LED lighting device driven by a rectified AC voltage includes a luminescent device, a charge storage unit and a current controller. The charge storage unit is configured to turn on the luminescent device when the rectified AC voltage is still insufficient to turn on the luminescent device. The current control unit is configured to allow the LED lighting device to have constant luminance regardless of the level of the rectified AC voltage or dimmer condition, thereby improving flicker phenomenon.

Abstract: A display device including a back cover, a frame, a display panel, a backlight module and a first polarizer is provided. The frame is disposed on the back cover and has an opening. The display panel is disposed in the opening and has a first surface and a second surface opposite to each other. The backlight module is disposed between the back cover and the display panel, where the first surface faces the backlight module. The first polarizer is disposed on the second surface, where a periphery of the first polarizer extends to the outside of the second surface and is carried by the frame, and the frame surrounds the periphery of the first polarizer. The display device avoids a light leakage phenomenon occurred at an edge of the display panel, achieves a full plane design at the display panel, and decreases a whole thickness.

Abstract: A display device including a backlight module and a display panel is provided. The backlight module includes a frame, a light guide element, and a light source. The light guide element is connected to the frame and has a light incident surface, a light emitting surface, and a back surface. The back surface is opposite to the light emitting surface and serves as an appearance surface of the display device. The light source is disposed in the frame and aligned with the light incident surface. The display panel is connected to the frame, and the light emitting surface faces the display panel. A backlight module is also provided. The display device and the backlight module provided in the invention are thinner and lighter, and have a desirable appearance.

Abstract: A display device having an exterior surface and including a back cover, a frame, a display panel and a backlight module is provided. The frame is assembled to the back cover and has a first supporting portion and a second supporting portion. The display panel is disposed in the frame, wherein the first supporting portion supports the display panel. The backlight module is disposed in the frame and located between the back cover and the display panel, wherein the second supporting portion supports the backlight module. The frame has a side surface, and the side surface is a portion of the exterior surface.

Abstract: A display device including a back cover, a frame, a display panel, a backlight module and a first polarizer is provided. The frame is disposed on the back cover and has an opening. The display panel is disposed in the opening and has a first surface and a second surface opposite to each other. The backlight module is disposed between the back cover and the display panel, where the first surface faces the backlight module. The first polarizer is disposed on the second surface, where a periphery of the first polarizer extends to the outside of the second surface and is carried by the frame, and the frame surrounds the periphery of the first polarizer. The display device avoids a light leakage phenomenon occurred at an edge of the display panel, achieves a full plane design at the display panel, and decreases a whole thickness.

Abstract: An LED lighting device driven by a rectified AC voltage includes a luminescent device, a charge storage unit and a current controller. The charge storage unit is configured to turn on the luminescent device when the rectified AC voltage is still insufficient to turn on the luminescent device. The current control unit is configured to allow the LED lighting device to have constant luminance regardless of the level of the rectified AC voltage, thereby improving flicker phenomenon.

Abstract: An LED lighting device driven by a rectified AC voltage includes a luminescent device, a charge storage unit and a current controller. The charge storage unit is configured to turn on the luminescent device when the rectified AC voltage is still insufficient to turn on the luminescent device. The current control unit is configured to allow the LED lighting device to have constant luminance regardless of the level of the rectified AC voltage, thereby improving flicker phenomenon.

Abstract: A manufacturing method of a sensor including the following steps and a sensor are provided. An active device and a first insulation layer covering the active device are formed on a substrate. The first insulation layer has a first opening exposing a portion of the active device. A blanket conductive layer is formed on the first insulation layer using a conductive material. The blanket conductive layer is connected to the active device through the first opening. A photoelectric conversion material layer is formed on the blanket conductive layer. A first photoresist pattern formed on photoelectric conversion material layer is served as a mask for patterning the photoelectric conversion material layer into a photoelectric conversion unit. The blanket conductive layer is patterned to form a first electrode disposed in the first opening and electrically connecting the photoelectric conversion unit to the active device.

Abstract: An LED lighting device includes first and second luminescent units, first and second current controllers, a line voltage sensing unit and a mode control unit. The first current controller with a first current setting is selectively coupled to the first luminescent unit according to a sensing voltage associated a range of the rectified AC voltage. The second current controller with a second current setting is coupled in series to the second luminescent unit . The line voltage sensing unit is configured to detect the sensing voltage. The mode control unit is configured to operate the LED lighting device in a first driving mode when detecting that the rectified AC voltage is within a first AC range and operate the LED lighting device in a second driving mode when detecting that the rectified AC voltage is within a second AC range.

Abstract: An LED lighting device includes first and second luminescent units, first and second current controllers, a line voltage sensing unit and a mode control unit. The first current controller with a first current setting is selectively coupled to the first luminescent unit according to a sensing voltage associated a range of the rectified AC voltage. The second current controller with a second current setting is coupled in series to the second luminescent unit. The line voltage sensing unit is configured to detect the sensing voltage. The mode control unit is configured to operate the LED lighting device in a first driving mode when detecting that the rectified AC voltage is within a first AC range and operate the LED lighting device in a second driving mode when detecting that the rectified AC voltage is within a second AC range.

Abstract: A connecting method for drawing includes the steps of selecting a first target and moving a cursor; calculating a distance between the cursor and a second target; determining whether the distance is less than a predetermined value; and prompting/displaying a connecting shortcut if the distance is less than the predetermined value.

Abstract: A display device includes a display panel, an electromagnetic touch panel, and a backlight module overlapping one another. The backlight module has a light guide plate and a light source module consisting of a flexible circuit board strip. The flexible circuit board strip includes a light source section and a signal transmission section extending along a light entrance edge and a side edge adjacent to the light entrance edge of the light guide plate, respectively. Two ends of a connection section are connected to the light source section and the signal transmission section, respectively. The connection section includes at least one first fold making the light source disposing plane of the light source section and the wiring disposing plane of the signal transmission section be non-coplanar and also makes the wiring disposing plane be parallel to the plane of the side edge of the light guide plate.

Abstract: An LED lighting device includes first through third luminescent devices and first through third current controllers. The first and second luminescent devices are driven by a rectified AC voltage for providing light of a first color. The third luminescent device is driven by the rectified AC voltage for providing light of a second color different from the first color. The first through third current controllers are configured to regulate the current flowing through the first through third current controllers according to a first current setting, a second current setting and a third current setting, respectively. The color rendering index of the LED lighting device can thus be adjusted flexibly.

Abstract: A display device includes a display panel, an electromagnetic touch panel, and a backlight module overlapping one another. The backlight module has a light guide plate and a light source module consisting of a flexible circuit board strip. The flexible circuit board strip includes a light source section and a signal transmission section extending along a light entrance edge and a side edge adjacent to the light entrance edge of the light guide plate, respectively. Two ends of a connection section are connected to the light source section and the signal transmission section, respectively. The connection section includes at least one first fold making the light source disposing plane of the light source section and the wiring disposing plane of the signal transmission section be non-coplanar and also makes the wiring disposing plane be parallel to the plane of the side edge of the light guide plate.

Abstract: An LED lighting device includes multiple luminescent devices driven by a rectified AC voltage. The multiple luminescent devices are turned on flexibly in a multi-stage driving scheme using multiple current control units. At least one charge storage unit is coupled in parallel with at least one luminescent device. When the rectified AC voltage is still insufficient to turn on the at least one luminescent device, the at least charge storage unit is configured to discharge energy to the at least one luminescent device, thereby keeping the at least one luminescent device turned on.

Abstract: An LED lighting device includes a slave driving stage and a master driving stage. The slave driving stage includes a first luminescent device and a first current controller for providing a constant current setting in an ON phase. The master driving stage includes a second luminescent device and a current control unit having a second current controller and a current envelope controller. The second current controller provides a current envelope in the ON phase. The current envelope controller sets a level of the current envelope according to a rectified AC voltage. The driving current is regulated by the first current controller according to the constant current setting when the constant current setting is smaller than the level of the current envelope, or by the second current controller according to the current envelope when the level of the current envelope is smaller than the constant current setting.