Abstract: A voltage converting device includes first and second stage circuits for converting a differential voltage to an output signal that has a magnitude smaller than the differential voltage. The second stage circuit includes input transistors for receiving voltages from the first stage circuit, output transistors for outputting the output signal, and a clamp module to clamp voltages at the input transistors of the second stage circuit.

Abstract: A switch control circuit includes a processor computing an on-time ratio based on an input voltage value, a first output voltage value, and a second output voltage value. The processor further computes an on-time sum based, on an output current value, an inductance value, the input voltage value, the first output voltage value and the second output voltage value, and further computes an operation frequency value that corresponds to the on-time sum. The processor further computes on-time values of a boost mode and a buck-boost mode based on the on-time sum and the on-time ratio. The processor controls a signal generator based on the operation frequency value, the on-time value of the boost mode and the on-time value of the buck-boost mode.

Abstract: A voltage converting device includes first to third voltage converters, each including a capacitor, a pair of charge switches for charging the capacitor, a pair of first output switches for outputting a first output voltage through the capacitor, and a pair of second output switches for outputting a second output voltage through the capacitor. Via timing control of the switches, outputs of the first and second output voltages are substantially continuous and are prevented from floating.

Abstract: A method for image data compression of a to-be-encoded image block includes: determining one of a plurality of preset encoding modes as an encoding mode based upon attributes of pixels of the to-be-encoded image block; and compressing image data of the to-be-encoded image block according to the encoding mode thus determined so as to obtain encoded data.

Abstract: A liquid crystal display (LCD) apparatus includes: multiple differential amplifier stages each of which is operable to generate, according to a bias current and an input voltage, an output voltage having a magnitude and a slew rate that correspond respectively to the input voltage and a magnitude of the bias current, and serving as a data voltage of a corresponding pixel unit of an LCD panel; multiple current sources controllable to generate and provide a plurality of the bias currents to the differential amplifier stages, respectively; and a bias voltage generating unit connected electrically to the current sources in a current mirror configuration for generating an input bias current and controlling the current sources to generate the bias currents according to a latch pulse signal. The slew rate of the output voltage corresponds to a logic state of the input bias current.

Abstract: A voltage converting device includes first to third voltage converters, each including a capacitor, a pair of charge switches for charging the capacitor, a pair of first output switches for outputting a first output voltage through the capacitor, and a pair of second output switches for outputting a second output voltage through the capacitor. Via timing control of the switches, outputs of the first and second output voltages are substantially continuous and are prevented from floating.

Abstract: An LED drive device includes: a drive module generating, based on a control signal, a drive current that flows through an LED-based load, and generating, based on the drive current, a sampling current associated with the drive current; a voltage detection module detecting a voltage across the LED-based load, and generating an adjustment signal based on the detection result and on a predetermined reference voltage; and a control signal generation module generating the control signal based on the adjustment signal, the sampling current and the predetermined reference voltage.

Abstract: An image processing method is adapted for hue adjustment of an original image pixel. The original image pixel is composed of a plurality of pixel components each having a component value. The image processing method includes: determining a hue zone to which the original image pixel belongs based directly on the component values of the pixel components thereof; obtaining a shifted hue zone according to a predefined hue shift amount, the determined hue zone, and the component values of the pixel components of the original image pixel; and obtaining a hue shifted pixel according to the obtained shifted hue zone, and the component values of the pixel components of the original image pixel.

Abstract: A display panel driver circuit includes multiple drivers adapted for cooperatively driving a display panel and each operable under a protection mode, and an overheat protection device including multiple protection circuits, each of which controls a respective one of the drivers to operate under the protection mode in response to receipt of an enable signal, an interface circuit which transmits the enable signal to each of the protection circuits in response to receipt of a warning signal, and multiple temperature detection circuits, each of which is able to detect a temperature associated with a respective one of the drivers, and outputs the warning signal to the interface circuit based on the temperature thus detected.

Abstract: An image processing method is adapted for color enhancement of an original image pixel. The original image pixel is composed of a plurality of pixel components each having a component value. The image processing method includes: determining a hue region to which the original image pixel belongs based directly on the component values of the pixel components thereof; selecting a color enhancement parameter corresponding to the determined hue region; and obtaining a color enhanced pixel according to the selected color enhancement parameter and the component values of the pixel components of the original image pixel.

Abstract: A voltage converting device includes first and second stage circuits for converting a differential voltage to an output signal that has a magnitude smaller than the differential voltage. The second stage circuit includes input transistors for receiving voltages from the first stage circuit, output transistors for outputting the output signal, and a clamp module to clamp voltages at the input transistors of the second stage circuit.

Abstract: A liquid crystal display apparatus includes a liquid crystal panel and a panel driving device. The panel driving device includes a timing control circuit, a gate driving circuit, and a source driving circuit. The source driving circuit includes a low voltage differential signal (LVDS) receiver, a driving voltage generator, and a controller. The LVDS receiver includes a plurality of receive circuits and a power saving control circuit. Each of the receive circuit performs level conversion upon a data LVDS to generate a logic signal, and operates in a selected one of a normal energy consuming mode and a power saving mode. The power saving control circuit controls the receive circuits to operate in the power saving mode when the power saving control circuit does not receive a power adjustment signal from the controller.

Abstract: An image processing method is adapted for color enhancement of an original image pixel. The original image pixel is composed of a plurality of pixel components each having a component value. The image processing method includes: determining a hue region to which the original image pixel belongs based directly on the component values of the pixel components thereof; selecting a color enhancement parameter corresponding to the determined hue region; and obtaining a color enhanced pixel according to the selected color enhancement parameter and the component values of the pixel components of the original image pixel.

Abstract: An image processing method is adapted for hue adjustment of an original image pixel. The original image pixel is composed of a plurality of pixel components each having a component value. The image processing method includes: determining a hue zone to which the original image pixel belongs based directly on the component values of the pixel components thereof; obtaining a shifted hue zone according to a predefined hue shift amount, the determined hue zone, and the component values of the pixel components of the original image pixel; and obtaining a hue shifted pixel according to the obtained shifted hue zone, and the component values of the pixel components of the original image pixel.

Abstract: A switch control circuit includes a processor computing an on-time ratio based on an input voltage value, a first output voltage value, and a second output voltage value. The processor further computes an on-time sum based, on an output current value, an inductance value, the input voltage value, the first-output voltage value and the second output voltage value, and further computes an operation frequency value that corresponds to the on-time sum. The processor further computes on-time values of a boost mode and a buck-boost mode based on the on-time sum and the on-time ratio. The processor controls a signal generator based on the operation frequency value, the on-time value of the boost mode and the on-time value of the buck-boost mode.

Abstract: A semiconductor device includes an n-type first doped region for receiving an external voltage, an n-type second doped region and a p-type third doped regions all formed in a p-type substrate, and is configured to have a first threshold voltage for forward conduction between the first and second doped regions, and a second threshold voltage for forward conduction between the first and third doped regions. A current is drained by flowing through the first doped region, the substrate and the second doped region if the external voltage is greater than the first threshold voltage or by flowing through the third doped region, the substrate and the first doped region if the external voltage is less than the second threshold voltage.

Abstract: A semiconductor device includes an n-type first doped region for receiving an external voltage, an n-type second doped region and a p-type third doped regions all formed in a p-type substrate, and is configured to have a first threshold voltage for forward conduction between the first and second doped regions, and a second threshold voltage for forward conduction between the first and third doped regions. A current is drained by flowing through the first doped region, the substrate and the second doped region if the external voltage is greater than the first threshold voltage or by flowing through the third doped region, the substrate and the first doped region if the external voltage is less than the second threshold voltage.

Abstract: A multiplexer includes: a first switch unit coupled between a first input terminal and an output terminal and including a series connection of first and second switches; a second switch unit coupled between a second input terminal and the output terminal; and a third switch unit coupled to a third input terminal and a common node between the first and second switches. Different first and second voltages, and a third voltage greater than one of the first and second voltages and less than the other one of the first and second voltage are applied respectively to the first, second and third input terminals. The multiplexer is operable between a first mode, where the first voltage is transmitted to the output terminal, and a second mode, where the second voltage is transmitted to the output terminal and the third voltage is transmitted to the common node between the first and second switches.

Abstract: An interpolative digital-to-analog (D/A) converter is adapted to convert a N-bit digital signal into an analog signal, where N is a positive integer greater than 1. The interpolative D/A converter includes a router unit that outputs first and second router voltages based on the first and second bits of the digital signal, and an interpolation unit that receives the first and second router voltages from the router unit, and that performs interpolation operation on the first and second router voltages according to the first bit of the digital signal, so as to generate the analog signal having a voltage magnitude ranging from the first router voltage to the second router voltage.

Abstract: A display panel driver circuit includes multiple drivers adapted for cooperatively driving a display panel and each operable under a protection mode, and an overheat protection device including multiple protection circuits, each of which controls a respective one of the drivers to operate under the protection mode in response to receipt of an enable signal, an interface circuit which transmits the enable signal to each of the protection circuits in response to receipt of a warning signal, and multiple temperature detection circuits, each of which is able to detect a temperature associated with a respective one of the drivers, and outputs the warning signal to the interface circuit based on the temperature thus detected.