Abstract: An application for a bezel with an internal graphics display system. The display system arranged to display static, dynamic or moving graphical images. The graphics display system consists of a bezel face and a display element. The bezel face is constructed of a transparent or translucent material such that light transmitted by the display element located behind the bezel face passes through the bezel face to the outside. The display element receives graphic images from a processing element and displays the image.

Abstract: A display device and a driving method thereof are provided. The display device comprises a plurality of pixels, each pixel includes: a light emitting element; a storage capacitor; a driving transistor that has a control terminal, an input terminal, and an output terminal and supplies a current to the light emitting element to emit light; a first switching transistor for supplying a data voltage to the storage capacitor in response to a scanning signal; a second switching transistor for diode-connecting the driving transistor in response to a previous scanning signal; and a third switching transistor for supplying a driving voltage to the driving transistor in response to an emission signal, wherein the storage capacitor stores a control voltage depending on a threshold voltage of the driving transistor and a threshold voltage of the light emitting element through the diode-connected driving transistor, and transmits the control voltage and the data voltage to the control terminal of the driving transistor.

Abstract: A method according to one embodiment may include supplying power to an LED array having at least a first string of LEDs and a second string of LEDs coupled in parallel, each of the strings includes at least two LEDs. The method of this embodiment may also include comparing a first feedback signal from the first string of LEDs and a second feedback signal from the second string of LEDs. The first feedback signal is proportional to current in said first string of LEDs and said second feedback signal is proportional to current in said second string of LEDs. The method of this embodiment may also include controlling a voltage drop of at least the first string of LEDs to adjust the current of the first string of LEDs relative to the second string of LEDs, based on, at least in part, the comparing of the first and second feedback signals. Of course, many alternatives, variations, and modifications are possible without departing from this embodiment.

Abstract: A display panel including a plurality of pixels. Each pixel includes: a light emitting element; a pixel circuit having a driving transistor connected to the light emitting element in series; a data line to which a data current is supplied through the pixel circuit; a scanning line for selecting the pixel circuit; a first insulation film to cover the data line; and a second insulation film made of a material different from the first insulation film, to cover the data line and the first insulation film, wherein the following expression is satisfied. C total 20 ? ? 0 ? ? a ? ? b ? a ? D b + ? b ? D a ? C total 5 Ctotal: parasitic capacitance of whole path to data line through pixel circuit; ?0: vacuum dielectric constant; ?a: relative dielectric constant of first insulation film; Da: first insulation film thickness; ?b: relative dielectric constant of second insulation film; Db: second insulation film thickness.

Abstract: An organic electroluminescent display device connected by a blocking diode in series to an organic light-emitting diode (OLED). Each pixel or subpixel of the electroluminescent display device comprises an OLED, a blocking diode to prevent the OLED from being reversed biased, a rectification diode to isolate the column electrode from unselected rows and a capacitor as a memory device. The charge stored in each memory capacitor may be increased by the blocking diode in series with each OLED. A frame period of the display device is divided into sub-frames that have address and light emission periods. Current mode data programming is used to address the device in each sub-frame. A ramp waveform is applied to the row electrode during the light emission period, to cause the capacitor to discharge through the OLED and control the forward current level.

Abstract: The present invention relates to electroluminescent polymers which contain structural units of the formula (1) and to the use thereof. The polymers according to the invention exhibit improved efficiency and a longer lifetime, in particular on use in polymeric organic light-emitting diodes.

Abstract: Disclosed is an organic light emitting display, which includes a large quantity of a hydroscopic layer having a good hydroscopic ability by changing a mounting structure of the hydroscopic layer. An organic light emitting display includes a first substrate. An organic emission portion is formed at one surface of the first substrate. A second substrate is formed at a surface of the first substrate on which the organic emission portion is formed for sealing the organic emission portion from external air. A first hydroscopic layer is formed between the first and second substrates. A third substrate is formed at another surface of the first substrate for sealing the first substrate. A second hydroscopic layer is formed between the first and third substrates.

Abstract: An emission driver includes a plurality of stages, each including: a first driver for outputting an emission control signal through a corresponding emission control line in accordance with either the emission control signal and an inverse emission control signal output from a previous stage of the plurality of stages or a start signal and an inverse start signal; and a second driver for outputting an inverse emission control signal in accordance with the emission control signal and the inverse emission control signal output from the previous stage or the start signal and the inverse start signal, wherein odd numbered stages of the plurality of stages coupled to corresponding odd numbered emission control lines are configured to be driven by a first clock signal, and even numbered stages of the plurality of stages coupled to corresponding even numbered emission control lines are configured to be driven by a second clock signal.

Abstract: Emissive quantum photonic imagers comprised of a spatial array of digitally addressable multicolor pixels. Each pixel is a vertical stack of multiple semiconductor laser diodes, each of which can generate laser light of a different color. Within each multicolor pixel, the light generated from the stack of diodes is emitted perpendicular to the plane of the imager device via a plurality of vertical waveguides that are coupled to the optical confinement regions of each of the multiple laser diodes comprising the imager device. Each of the laser diodes comprising a single pixel is individually addressable, enabling each pixel to simultaneously emit any combination of the colors associated with the laser diodes at any required on/off duty cycle for each color. Each individual multicolor pixel can simultaneously emit the required colors and brightness values by controlling the on/off duty cycles of their respective laser diodes.

Abstract: A control circuit for controlling light emitting diodes comprises a switch for turning on or off a string of light emitting diodes. A combiner generates a control signal from a data signal and a noise signal. A sigma delta modulator receives the control signal and a clock signal with a clock period and generates a switching signal for controlling the switch.

Abstract: Method and apparatus for simulating an operating television for the purpose of deterring potential intruders by providing the appearance that one or more occupants are at home. Realistic simulation of a television is accomplished via perceived random combinations, amplitudes, colors, and durations of television program scene modes, these scene modes comprised of fades, swells, flicks, and static periods. Efficient, reliable, and inexpensive super-bright LEDs serve as light sources.

Abstract: The present invention provides a semiconductor device and its driving method in which amplitude of a data line is decreased to reduce power consumption. In a reset period, a reset transistor and a switch transistor are turned on. In the reset period, an input of a potential from the reset transistor is dominant in a node D, and a selection transistor is turned off when a potential of the node D gets higher than a gate potential of the selection transistor. Thus, even though a potential of the data line changes, a potential of the node G does not change. Since the potential of the data line is not directly written in a gate of a driver transistor, it is possible to separately set an on/off potential to be applied to the gate of the driver transistor and the amplitude of the data line.

Abstract: A method for selecting paints is disclosed. This method includes the steps of selecting true paint colors, displaying device-dependent colors corresponding to the true paint colors in a simulated full size room and interacting with the buyers to change the displayed colors and select the desired colors. The method also includes the step of dispensing paints corresponding to the selected colors. The displayed colors are generated by multiple color and/or white LEDs to provide a wider gamut of displayable colors and more color saturation and chromatic. A full-size apparatus for displaying paint colors using device-dependent colors is also disclosed.

Abstract: A control circuit having a drive circuit and a controller adapted for use in optical mice is disclosed. The drive circuit is connected between first and second ports and passes a current between those ports having an amplitude determined by a control signal that is generated by the controller. The first port is connected to an illumination device and the second port is connected to a power rail. The control circuit also includes a potential measuring circuit that generates a signal indicative of a drive circuit potential between the first and second ports. The controller records the drive circuit potential for a predetermined current when the first port is connected to an illumination device. The controller sets the control signal based on the recorded drive circuit potential. The control circuit can record the drive circuit potential when the controller is powered.

Abstract: The invention relates to an LED current driving system. The LED current driving system comprises an LED driver. The LED driver comprises at least one LED driving unit for outputting a driving current to an LED. Each LED driving unit comprises a plurality of current sources and a plurality of switches. The switches are connected to the corresponding current source. Each switch controls the ON/OFF state of the corresponding current source in accordance with the duty cycle control signal and a current control signal. Therefore, by integrating the LED driver on the LCOS panel, the LED current driving system of the invention can decrease the pin number of the LCOS chip, the overall area and the system cost so as to improve the yield of the LED current driving system. Besides, the LED current driving system utilizes the current sources to form the driving current to stably and precisely control the driving current flowing through the corresponding LED so that the color quality of the image can be improved.

Abstract: A luminous display for automotive satellite navigation systems includes a panel equipped with light sources, for example made up of LEDs, arranged in a pre-ordered configuration of discrete segments, which can be combined with one another according to paths corresponding to the representation of a plurality of encoded generally arrow-shaped pictograms, each of which indicates a respective direction to follow indicated by the navigation system. The path to follow is highlighted with respect to possible alternative paths represented by the pictograms.

Abstract: Method and apparatus for simulating an operating television for the purpose of deterring potential intruders by providing the appearance that one or more occupants are at home. Realistic simulation of a television is accomplished via perceived random combinations, amplitudes, colors, and durations of television program scene modes, these scene modes comprised of fades, swells, flicks, static periods, and low frequency noise. Color shifts, both subtle and dramatic, effectively emulate true television output. Efficient, reliable, and inexpensive super-bright LEDs serve as light sources.

Abstract: An active matrix organic LED display having a matrix of multiple light emitting pixels and electronic drive circuitry for selectively addressing the pixels, each pixel containing an organic LED. The electronic drive circuitry includes row scan electrodes and column data electrodes that interconnect the matrix of pixels. The circuitry also includes a MEMS switching device and a memory capacitor for each pixel, the MEMS switching device connecting the memory capacitor to a column data electrode during addressing of a pixel and connecting the memory capacitor to the organic LED of each pixel during light emission.

Abstract: Each pixel includes: a light emitting element; a capacitor; a driving transistor that has a control terminal, an input terminal, and an output terminal and supplies a driving current to the light emitting element to emit light; a first switching unit that diode-connects the driving transistor and supplies a data voltage to the driving transistor in response to a scanning signal; and a second switching unit that supplies a driving voltage to the driving transistor and connects the light emitting element and the capacitor to the driving transistor in response to an emission signal, wherein the capacitor is connected to the driving transistor through the first switching unit, stores a control voltage being a function of the data voltage and the threshold voltage of the driving transistor, and is connected to the driving transistor through the second switching unit to supply the control voltage to the driving transistor.

Abstract: To reduce the time for writing a voltage onto a gate of a driving transistor. In an initialization period, a node B is fixed to an initial voltage VINI, transistors are turned on, and a current flows into an OLED element, such that a voltage according to the current is held at the node A. Thereafter, the transistors are sequentially turned off, such that a threshold voltage of a driving transistor is held at the node A. In a writing period, a transistor is turned on and a data signal X-j is supplied, such that a voltage of the node B varies by the amount according to the current flowing into the OLED element. The voltage of the node A varies from the threshold voltage by the amount which is obtained by dividing the voltage variation by a capacitance ratio. In a light-emitting period, the transistor is turned on, such that a current according to the voltage of the node A flows into the OLED element.

Abstract: A display apparatus for displaying indications using liquid crystal or Light-Emitting Diodes (LEDs) that includes a 12-segment display, including a first segment horizontally disposed with an inverted trapezoidal shape, a second segment disposed under the right end of the first segment with a parallelogram shape, a third segment disposed under the second segment with an isosceles triangle shape, a fourth segment disposed under the third segment with a parallelogram shape, a fifth segment horizontally disposed beside the bottom end of the fourth segment with a trapezoidal shape, a sixth segment disposed over the left end of the fifth segment with a parallelogram shape, a seventh segment disposed over the sixth segment with an isosceles triangle shape, an eighth segment with a parallelogram shape, ninth and tenth segments horizontally disposed between the triangular segments with a square shape, and eleventh and twelfth segments respectively disposed over and under the ninth segment with a square shape.

Abstract: A backlight assembly driving apparatus for a liquid crystal display device includes a light emitting diode string of serially connected light emitting diodes, and switching devices connected in parallel to and in a one-to-one correspondence with the light emitting diodes to conduct or turn off current applied to a correspondingly parallel-connected light emitting diode.

Abstract: A fluorescent material includes first and second phosphors. The first phosphor is a light-storing phosphor, which is represented by the general formula (M1-a-bEuaQb)Al2O4, wherein M is one type selected from the group consisting of Mg, Ca, Ba, Sr and Zn; Q is one type selected from the group consisting of Pr, Nd, Dy, Er and Ho; a is a number that satisfies 0.0001?a?0.5; and b is a number that satisfies 0.010?b?0.5. When the fluorescent material is excited for about 15 minutes by ultraviolet irradiation having about 365.0 nm wavelength with an intensity of 0.5 mW/cm2, and the color of the afterglow of the fluorescent material is measured 1 minute and 10 minutes after excitation is terminated, an amount of change between chromaticity measured 1 minute after excitation and that measured 10 minutes is in the range of ?0.001?x?0.009 and ?0.009?y?0.006.

Abstract: The present invention provides a method and apparatus for controlling the thermal gradient and therefore the thermal stress in light-emitting elements in which the light-emitting elements are exposed to temperature gradients caused by varying drive current under operating conditions. The method and apparatus according to the present invention can reduce the thermal stress in a light-emitting element by adaptively determining a drive current transient for a required change in the drive current from a first drive current state to a desired second drive current state, wherein the drive current transient is adaptively determined in order to substantially minimize the change in applied voltage over time, during the transition time period.

Abstract: A system and method of producing an image using a plurality of independent pixel devices, each of which includes one or more light emitting or polarizing elements. The pixel devices are fixed (e.g. on the side of a building) or are moving (e.g. on water or falling in air) within an image space in which an image is to be formed. A controller determines, based upon the locations of the pixel devices within the image space, what portion of the image each pixel device is to reproduce, and then commands the pixel devices to use the emitting devices to reproduce the corresponding portion of the image. As the pixel devices move, the new locations of the pixel devices are mapped onto the image, and the control of the pixel devices is modified accordingly so that the image produced by the pixel devices is not distorted by their movement.

Abstract: A LED driver is connectible to several series connected RGB LEDs which connect in series with a current generator. A plurality of LED switches are respectively connectible across one RGB LED. Each LED switch, operating in response to a binary signal is either open to permit electrical current to flow through the RGB LED, or closed to shunt current around that RGB LED. By varying respective duty cycles of the binary signals the LED driver is adapted for controlling operation of the combined RGB LEDs so they emit differing colors of light. An adaptive boost converter LED driver continuously adjusts voltage applied across the series connected RGB LEDs to be only that required for operating those LEDs through which open LED switches permit current to flow.

Abstract: Emissive quantum photonic imagers comprised of a spatial array of digitally addressable multicolor pixels. Each pixel is a vertical stack of multiple semiconductor laser diodes, each of which can generate laser light of a different color. Within each multicolor pixel, the light generated from the stack of diodes is emitted perpendicular to the plane of the imager device via a plurality of vertical waveguides that are coupled to the optical confinement regions of each of the multiple laser diodes comprising the imager device. Each of the laser diodes comprising a single pixel is individually addressable, enabling each pixel to simultaneously emit any combination of the colors associated with the laser diodes at any required on/off duty cycle for each color. Each individual multicolor pixel can simultaneously emit the required colors and brightness values by controlling the on/off duty cycles of their respective laser diodes.

Abstract: This invention is an architecture of Driver IC used by the LED light systems. Each Driver IC comprises at least one Drive Cell that connects to an individual LED. The LED data are transmitted via a sequential scanning method from Drive Cell to Drive Cell, and from Driver IC to Driver IC that are connected in a cascade manner.

Abstract: A waveform generator generates LED signal values that define an LED waveform and period. Each signal value is scaled by a particular scaling value to scale the amplitude of the LED waveform. The scaled LED waveform is then transmitted to an LED to cause the light emitted by the LED to pulse at a variable brightness.

Abstract: A system and drive method for compensating intensity variation due to variation of operating cycles in a dynamically controlled system comprising a plurality of light emitting devices are provided in this invention.

Abstract: A method and apparatus for driving LED's is disclosed, comprising the steps of receiving a desired intensity value, wherein the desired intensity value represents the desired intensity for the LED's; generating a first switching control signal, wherein the first switching control signal is a pulse width modulated signal whose duty cycle is based on the desired intensity value; switching the LED's on and off based on the first switching control signal, wherein the switching takes place when the desired intensity value is less than a first desired intensity value threshold; generating a desired constant current value based on the desired intensity value, wherein the desired constant current value represents the value of the desired constant current to drive the LED's; determining an actual constant current value, wherein the actual constant current value represents the value of the actual constant current driving the LED's; comparing the actual constant current value with the desired constant current value; and

Abstract: An LED current control device (100) includes a set of one or more LEDs (10) connected to a current-sensing element (20) and an external voltage source (VEXT). A sense signal produced by the current-sensing element may be amplified by a sense signal amplifier (30) and sent to a switching controller (40 and 50). The switching controller may perform hysteretic control on the amplified sense signal by controlling a switching element 70 to turn on and off. The on and off states of the switching element respectively enables and disables power from the external voltage source to the LEDs. As such, hysteretic control may be performed on the current in the LEDs.

Abstract: An organic electroluminescent display supplies a reverse bias voltage to an Organic Light-Emitting Diode (OLED) for emitting light. The organic electroluminescent display additionally includes a reverse bias transistor to supply the reverse bias voltage. The reverse bias transistor is connected between an anode of the OLED and a reverse bias power supply, between the anode of the OLED and a first power line supplying a positive source voltage, or between the anode of the OLED and a data line. Furthermore, the reverse bias transistor can be connected between an initialization line and the anode of the OLED. The reverse bias voltage is supplied to the OLED before displaying an image or within a non-display period of a vertical synchronous signal, thereby enabling detection of whether or not the OLED has a defect.

Abstract: A control device for work lamp includes a microprocessor, which is able to receive signals sent from a power supply unit and a switch. The microprocessor is able to determine the number of times that the switch is pressed and then send out a command to the activation unit, which will in turn activate the light unit. All or a part (a quarter, half or three quarters) of the lights of the light unit may be turned on in their full brightness, half of their full brightness or a portion of the full brightness or in flashing light. Hence, the control device of the present invention allows a user to select from several brightness levels according to the actual needs so as to save electricity.

Abstract: A pixel unit for an organic electroluminescence display device includes four switching transistors, a driving transistor, a capacitor and an organic light emitting diode, configured in a circuit to prevent picture quality deterioration of the display device due to deterioration of the transistors characteristics in a pixel unit.

Abstract: A control circuit for regulating current supplied from a power source to at least one load. The control circuit has a current mirror circuit electrically coupled between the power source and the at least one load, and being capable of regulating current supplied from the power source to the at least one load at different levels; a real-time clock (RTC) circuit adapted for recording real time; and a micro control unit (MCU) electrically coupled between the RTC circuit and the current mirror circuit, and configured such that when the real time changes from a first time period to a second time period, the MCU generates control signals to trigger the current mirror circuit to regulate current supplied from the power source to the at least one load from a first level corresponding to the first time period to a second level corresponding to the second time period.

Abstract: The present invention relates to a method for simulating the scenes of image signals, which comparing different image signals in alternation time to decide the emitting type and the emitting conversion of a light-emitting device so as to accomplish simulating the scenes of the image signals.

Abstract: A large scale LED display has a cable and rigid link support structure for a number of LED modules. The cable and rigid link support structure is flexible but has sufficient structural integrity to prevent misalignment of the pixel modules. The LED modules are removable from the support structure individually and as a group so as to facilitate repair of the display. The LED modules are rugged so as to withstand harsh outdoor conditions and they provide sufficient luminescence for use in sunlight.

Abstract: A system and method are provided for a pixel module to determine its location in a large scale LED display. The system and method determine the pixel module's location based upon the data received by the module and the identity of the module's port via which the data was received.

Abstract: A large scale LED display has a number of display panels each having a cable and spacer support structure for a number of LED modules. Adjacent display panels are connected together by a number of seam links that snap onto one cable of one of the display panels and one cable of the adjacent display panel. The cables may include a number of seam link engagement members spaced along the length of the cable and onto which the seam links snap wherein each of the seam link engagement members locates an LED module on the support structure. The LED modules include top and bottom housing sections that snap together, wherein one of the housing sections includes a seat for an electrical connector. The seat locates the connector and a printed circuit assembly within the LED module.

Abstract: A dynamic messaging system comprises a balloon, a lighting array disposed within the balloon and further comprising a plurality of light-emitting diodes, a power source connected to the lighting array, and a means for rotating the lighting array within the balloon. In a first preferred embodiment, the lighting arrays includes a plurality of light-emitting diodes that are capable of generating monochrome visible light, thereby providing simple graphics and alphanumeric messages. In a second preferred embodiment, the lighting array includes a plurality of light-emitting diodes are capable of generating colored visible light, thereby providing complex graphics and messages. In a third embodiment, the lighting array includes a plurality of ultraviolet laser diodes that generate graphics and messages on an inner, flourescent-coated surface of the balloon.

Abstract: An amplifier circuit for generating a predetermined constant voltage required for resetting organic EL elements or capacitors is provided and an operating current switching circuit switches the operating current of the amplifier circuit to an idling current in a display period and to a steady operation current required to performing a reset operation in a reset period, so that a shifting time of the amplifier circuit from the idling state to the steady operation state can be shortened and a constant control voltage for resetting the organic EL elements or the capacitors can be generated in an initial portion of the reset period.

Abstract: A light guiding plate is provided on the obverse side of a display for displaying a display image while varying the display image. Unevenness is formed at a predetermined position at a reverse surface of the light guiding plate. A light emitting element is disposed at the side surface of the light guiding plate in such a manner as to introduce the light to the light guiding plate. Alternatively, an uneven portion in conformity with a pattern of a desired display image may be formed at a reverse surface of the light guiding plate, and a light emitting element is disposed at the side surface of the light guiding plate in such a manner as to introduce the light to the light guiding plate.

Abstract: A LED system (100) for illumination and data transmission employs a LED driver (110), an electronic switch (130), and an illumination unit (150). In a first illumination state, illumination unit (150) receives LED current(s) from LED driver (110) to emit a first light output. In a second illumination state, the illumination unit (150) receives additional LED current(s) from LED driver 110 via the electronic switch as controlled by the LED driver where the illumination unit (150) additionally emits a second light output. LED system (100) optically communicates a data bit with each transition of the illumination unit (150) from the first illumination state to the second illumination state, and vice-versa.

Abstract: A plurality of common, modular panels attach to a support frame carrying power and data connections for an electronic display sign. LEDs are used as the light mechanisms for illumination of said sign. Each modular panel is under separate microcontroller control and includes its own on-board memory. The electronic display sign includes a master control element that connects to a PC or laptop computer for loading data or programs into the memory of each modular board. The master control sends out commands or data that is interrogated by every microcontroller on each modular panel of the entire sign such that only the panel with a unique identification number will process data intended therefore. The on-board memory allows for the creation of a virtual screen such that each modular panel of the entire sign is rendering the entire message being displayed on said sign even though each modular panel may only be actually illuminating a portion of said message on the LEDs of each panel.

Abstract: A method displays a single image on a graphical display for diagnostic purpose, without interrupting an observer's perception of the display of a sequence of images. Under that method, a sequence of images is displayed on a graphical display, interrupted only by the diagnostic image that is displayed for a time period not longer than 30 milliseconds. The diagnostic image may be used, for example, for calibrating colors and luminances of pixels in the graphical display. Another use of the diagnostic image may be, for example, determination of the ambient light reflected from the graphical display.

Abstract: An LED interface circuit provides connection options for one or more types of LEDs. In an embodiment, the circuit includes an input node that receives an LED control signal, and an output that has a first output node, and a second output node. A driving circuit is disposed between the input header and the output. The driving circuit has a non-inverted input node and an inverted output node. In an embodiment, the inverted output node is capable of sinking current. The non-inverted input node is coupled to the input header and to the first output node, while the inverted output node is coupled to the second output node. The output of the LED interface circuit is capable of driving a plurality of different types of LED displays.

Abstract: The objective of this invention is to provide a drive circuit and display system that can efficiently transfer prescribed information indicating an abnormality in the drive current supplied to the display elements to a control device. The control data used for controlling the turning on and off of LEDs are shifted sequentially from the first section to the final section of LED drivers 10-1-10-K connected in cascade. In the drive circuit of each section, the control data input from the previous section are held in the first data holding means synchronously with clock signal CLK. Then, the data held in the first data holding means are held in the second data holding means synchronously with latch signal XLAT. Current corresponding to the control data of the second data holding means is supplied to LEDs 40-1-40-M. On the other hand, when new control data are held in the second data holding means, the data indicating prescribed information concerning abnormal functioning of the LED, etc.

Abstract: A method for selecting paints is disclosed. This method includes the steps of selecting true paint colors, displaying device-dependent colors corresponding to the true paint colors in a simulated full size room and interacting with the buyers to change the displayed colors and select the desired colors. The method also includes the step of dispensing paints corresponding to the selected colors. The displayed colors are generated by multiple color and/or white LEDs to provide a wider gamut of displayable colors and more color saturation and chromatic. A full-size apparatus for displaying paint colors using device-dependent colors is also disclosed.

Abstract: A light-emitting diode (LED) light source control method is disclosed. The light-emitting diode light source control method is used for controlling a composite and a single color LED light source. The composite color LED light source can provide two of the three original red, green and blue color lights and the single color LED light source provides the third original color. The composite and the single color LED light sources provide illuminations sequentially so that the light sources need not to be turned on continually and the data generated by the composite and the single color lights on the red, green and blue channels of image sensors can be processed sequentially.