摘要:
A computer-implemented method for automatically controlling a dynamic backlight control (DBC) of a display is disclosed according to one aspect of the subject technology. The method comprises determining whether an image to be displayed on the display comprises a high-resolution still image, and, if the image comprises a high-resolution still image, then disabling the DBC.
摘要:
A computer-implemented method for automatically controlling a dynamic backlight control (DBC) of a display is disclosed according to one aspect of the subject technology. The method comprises determining whether an image to be displayed on the display comprises a high-resolution still image, and, if the image comprises a high-resolution still image, then disabling the DBC.
摘要:
A backlight for providing light to a computer-controlled display device, includes a plurality of first light sources, a plurality of second light sources, and a light guide panel (LGP). The LGP has at least one edge and a surface facing a display surface of the display device and is adapted for guiding light emitted by, and received from, the first and second light sources at one or more edges of the LGP to the surface of the LGP. The first light sources include first light emitting diodes (LEDs) having a peak emission wavelength of greater than 500 nm. The second light sources include second LEDs having a peak emission wavelength of less than 480 nm and phosphor material that absorbs a portion of light emitted from the second LEDs and converts the absorbed light into light emitted from the phosphor material having a peak emission wavelength greater than 500 nm.
摘要:
Disclosed are devices and methods for intradevice communication in a mobile communication device having a display. A method includes providing a supply signal and superimposing a data signal onto the supply signal. The method further includes driving a light source with the supply signal and the superimposed data signal to produce light to illuminate the display. Also included is sensing the light illuminating the display with an optical sensor, which is coupled to a receiver circuit, and then distinguishing the data signal from the sensed light with the receiver circuit. An image is formed on the display using the data signal distinguished with the receiver circuit.
摘要:
A liquid crystal display screen of an electronic device is formed on a glass substrate. The glass substrate has an active display area with liquid crystal display elements disposed thereon. The active display area is bordered by an edge area of the glass substrate. Antenna elements are disposed in the edge area of the substrate. The antenna elements are coupled to wireless communications circuitry in the electronic device.
摘要:
A light source can include an LED configured to emit light having a spectrum of first wavelengths when provided with electrical current, a pumped material configured to absorb at least some of the light emitted by the LED and to emit light having a spectrum of second wavelengths, a power supply configured to provide a series of electrical current pulses to the LED, and a current controller configured to control a time-averaged chromaticity coordinate of a combination of light emitted from the LED and the pumped material by controlling the series of current pulses provided to the LED.
摘要:
The preferred embodiments of the present invention provide a system and method for reducing the battery power required by a handheld device (300) that incorporates a graphical display (301). Graphical display (301), display drivers (307), LCD controller (403) and a memory (405) are optimized such that several pixels of information may be clocked simultaneously when the device is operating in a partial display mode. The optimized circuitry reduces the required refresh clock frequency (411) and thus the current drain on a device battery (319) thereby improving device operation time.
摘要:
An ionizer includes an alternating current (AC) voltage source having an output outputting a waveform with a positive half-cycle and a negative half-cycle, an electrode electrically coupled to the output of the AC voltage source, a reference proximate the electrode and a sensing circuit. The sensing circuit includes a return current nulling node electrically coupled to the output of the AC voltage source and the reference, a ground node separately electrically coupled to ground, a positive ion current sensor and a negative ion current sensor. The positive ion current sense node is configured to output a positive ion signal proportionate to a sensed positive ion current. The negative ion current sense node is configured to output a negative ion signal proportionate to a sensed negative ion current.
摘要:
A method for controlling an emission current (134) in a field emission display (100) includes measuring an emission current (134), measuring a portion of the plurality of pixels receiving emission current (134) as a percentage of the plurality of pixels on the anode (138) to define a set point, comparing measured value to set point value and adjusting gate voltage to cause emission current to approach set point value. A field emission display (100) includes a control circuit (111), which has an analog-to-digital converter (150), a current controller (154), as display timing controller (151) and a gate voltage source (158). Analog-to-digital converter (150) is designed to be connected to power supply (146). Gate voltage source (158) is connected to gate extraction electrode (126) and applies thereto the offset voltage, which is manipulated by current controller (154) in response to an output signal (152) of analog-to-digital converter (150) and an output signal of display timing controller (151).
摘要:
A liquid crystal display screen of an electronic device is formed on a glass substrate. The glass substrate has an active display area with liquid crystal display elements disposed thereon. The active display area is bordered by an edge area of the glass substrate. Antenna elements are disposed in the edge area of the substrate. The antenna elements are coupled to wireless communications circuitry in the electronic device.