摘要:
An exemplary light source array (230) includes at least one light source bar (33), each light source bar comprising a plurality of light source unit (35), each light source unit (35) has a first color LED (351), two second color LEDs (353) and two third color LEDs (355). The two second color LEDs and two third color LEDs are respectively disposed at two sides of the first color LED, and two adjacent LEDs in each light source bar have two different colors.
摘要:
An exemplary light emitting diode (200) includes a base (18), a semiconductor chip (20), a cover (28), and two optical layers (30). The semiconductor chip is formed on the base. The cover is formed on the base and covers the semiconductor chip. The optical layers cover part of a peripheral side of the cover respectively.
摘要:
An exemplary power driving system (21) typically used in a liquid crystal display (LCD), including a power supply circuit (22), the power supply circuit (22) includes a flyback circuit (224) configured for transforming a high alternating current (AC) voltage to a plurality of low DC voltages and providing a plurality of low direct current (DC) voltages to a gate driver (283) and a data driver (282) of the LCD.
摘要:
An exemplary light emitting diode (200) includes a base (18), a semiconductor chip (20), a cover (28), and two optical layers (30). The semiconductor chip is formed on the base. The cover is formed on the base and covers the semiconductor chip. The optical layers cover part of a peripheral side of the cover respectively.
摘要:
An exemplary liquid crystal display (3) includes a matrix-converting circuit (316) and an inverse-matrix-converting circuit (327). The matrix-converting circuit receives an RGB (red green blue) signal, and converts the RGB signal to a YCbCr signal. The inverse-matrix-converting circuit converts the YCbCr signal back to the RGB signal. The liquid crystal display requires only a relatively small amount of bandwidth for signal transmission. A related method of transmitting signals in a liquid crystal display is also provided.
摘要:
An exemplary driving circuit of a liquid crystal display includes a delay circuit (130), a first transistor (140), a second transistor (160), a first bias resistor (R1), and a second bias resistor (R2). The first transistor includes a source electrode for receiving a first voltage signal, and a drain electrode for providing the first voltage signal to a first external circuit. The second transistor includes an emitter electrode for receiving a second voltage signal, and a collector electrode for providing the second voltage signal to a second external circuit. The delay circuit includes a first control pin (137) connected to the gate electrode of the first transistor, and a second control pin (138) connected to the base electrode of the second transistor. The delay circuit is configured for delaying the first voltage signal for a first predetermined time period and the second voltage signal for a second predetermined time period.
摘要:
An exemplary voltage generating circuit (34) includes a first pulse generator (341) configured to provide a first pulse signal having a fixed duty ratio, a second pulse generator (342) configured to provide a second pulse signal having a variable duty ratio, and a charge pump (343) electrically coupled to the first pulse generator and the second pulse generator. The charge pump outputs a voltage signal according to the first and second pulse signals. When the voltage signal is adjusted, the duty ratio of the second pulse signal is modulated by the second pulse generator, such that the voltage signal outputted by the charge bump is adjusted to have a corresponding value. A liquid crystal display (300) using the voltage generating circuit is also provided in the present invention.
摘要:
An exemplary driving circuit of a liquid crystal display includes a delay circuit (130), a first transistor (140), a second transistor (160), a first bias resistor (R1), and a second bias resistor (R2). The first transistor includes a source electrode for receiving a first voltage signal, and a drain electrode for providing the first voltage signal to a first external circuit. The second transistor includes an emitter electrode for receiving a second voltage signal, and a collector electrode for providing the second voltage signal to a second external circuit. The delay circuit includes a first control pin (137) connected to the gate electrode of the first transistor, and a second control pin (138) connected to the base electrode of the second transistor. The delay circuit is configured for delaying the first voltage signal for a first predetermined time period and the second voltage signal for a second predetermined time period.
摘要:
An exemplary liquid crystal display device (20) includes a plurality of pixel electrode (26), a common electrode (22), a data driving circuit (33) configured for providing data voltages to each pixel electrode, and a common voltage generating circuit (34) configured for providing a common voltage to the common electrode. The common voltage generating circuit includes a hysteresis comparator circuit (341) and a direct current voltage adjusting circuit (343). The hysteresis comparator circuit is configured for providing an alternating current voltage, and the direct current voltage adjusting circuit is configured for providing a direct current voltage with periodic change. The direct current voltage is configured for superimposing on the alternating current voltage to form a common voltage, and an absolute value of the common voltage changes only slightly within a predetermined range from each frame to the next adjacent frame. A method for driving the liquid crystal display device is also provided.
摘要:
An exemplary liquid crystal display (20) includes a plurality of pixel units (240) each including a pixel electrode (26) and a common electrode (22), a data driving circuit (33) providing a plurality of data voltages to each pixel electrode, a common voltage generating circuit (34) providing a common voltage to each common electrode, and a gamma voltage generating circuit (35) providing gamma voltages to the data driving circuit. The plurality of pixel units are arranged in a matrix. The voltage difference between the data voltage and the common voltage in each pixel unit is a sum of a main voltage and an auxiliary voltage with periodical change. An absolute value of the main voltage is constant. An absolute value of the auxiliary voltage is less than the absolute value of the main voltage. A sum of the auxiliary voltage is zero in a minimum period.