Abstract: The present invention relates to an LED driver for driving a plurality of light emitting diodes (LEDs), comprising a current controller to control power supply of a predetermined power source unit to make a current flowing in the plurality of LEDs reach a predetermined target current value which sequentially changes corresponding to the respective LEDs; a plurality of divergence switches to flow or interrupt the current with respect to each of the plurality of LEDs; a bypass switch being connected in parallel with respect to the plurality of divergence switches and the plurality of LEDs and to flow or bypass the current supplied to the plurality of LEDs by being open or short-circuited; and a switch controller to sequentially open and close the plurality of divergence switches corresponding to change of the target current value and control the bypass switch to be short-circuited in a range where the current supplied to the LEDs increases, corresponding to the rise of the target current value.

Abstract: A Red, Green, Blue Light Emitting Device (RGB LED) backlight color control system includes an RGB LED backlight comprising a red LED, a green LED, and a blue LED. A driving current regulator is coupled to each of the red LED, the green LED, and the blue LED. A backlight power control is coupled to each of the driving current regulators and operable to receive adjustment data and use the adjustment data to adjust the driving current supplied by at least one of the driving current regulators to at least one of the red LED, the green LED, and the blue LED. By adjusting the driving current supplied to the red LED, green LED, and/or the blue LED, color pallet points on a color triangle (associated with a display that uses the RGB LED backlight) are shifted to achieve the color desired by the user, avoiding the loss of color pallet points in the color triangle that occurs with conventional re-mapping techniques.

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 multi-color pixel array and method includes an organic active layer of a material emitting a first spectral distribution of visible light having a first color; a transparent conducting layer, each of which include portions that correspond to individual pixels and sub-pixels of the array; one or more pairs of electrodes for selectively energizing sub-pixel areas of the organic active layer to generate an emission of visible light of a first spectral distribution; wherein different sub-pixels within individual pixels of the array have different optical thicknesses based at least on corresponding sub-pixel portions of the transparent conducting layer having different optical thicknesses; and wherein at least one sub-pixel of has a selected color different from the first color due to at least one narrowed spectral band being selected out of the first spectral distribution as emitted light is coupled out of the display through the transparent conducting layer.

Abstract: An organic light emitting display including a demultiplexer on each data line that splits and supplies each data signal to a plurality of data lines, thereby decreasing the number of output lines required and reducing production cost. Further, voltages corresponding to the data signals are sequentially charged in data capacitors, while the charged voltages are supplied to the pixels simultaneously allowing the organic light emitting display to display an image with uniform brightness. Scan periods for supplying the scan signals do not overlap with data periods for supplying the data signals thus yielding a stable image. Also, the capacitance of the data capacitor is set to compensate the voltage drop in the first power source line, thereby displaying an image with uniform brightness.

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: Color management and color-managed workflow concepts are applied to lighting apparatus configured to generate multi-colored light, including lighting apparatus based on LED sources. In particular, color management principles are employed to facilitate the generation of variable color light from a given lighting apparatus based on any of a number of possible input specifications for a desired color. In one example, a transformation between an arbitrary input specification for a desired color and a lighting command processed by the lighting apparatus is accomplished via the use of a source color management profile for the input specification of the desired color, a target color management profile for the lighting apparatus, and a common working color space. Colors defined in the common working color space may be reproduced or approximated (e.g., according to one or more rendering intents) by one or more lighting apparatus.

Abstract: This invention relates to an ambient lighting system for a display device including an image display region. Controllable light sources that are substantial point-like and disposed in an array are provided, each being adapted to emit a light beam of at least one wavelength onto an region visually appearing to the viewer peripherally surrounding the display. An image analyzer determines the color information from video data of the displayed image, the color information being used as a control parameter for controlling the emission color of the emitted light beams. Due to the substantial point-like property of the light sources along with their arrangement within the array the emitted light beams onto the region forms a pixelated image so as to provide at least a partial extension of the image display region.

Abstract: A light-emissive module (114), typically utilizing one or more LEDs (132R, 132G, and 132B), is configured so that the maximum intensity of the module's light emission occurs along a direction (138) materially non-perpendicular to the back surface (136) of the module's supporting body (130). An active image-generating screen (102) contains a plurality of block facets (112), each containing a plurality of the light-emissive modules arranged so that their maximum light-intensity directions are largely the same. The block facets are configured to approximate a curved surface. The maximum light-intensity directions (158) of the block facets are thus materially slanted to one another. The image-generating screen presents a video image. A display system suitable for a motion simulator, such as a flight simulator, is formed by combining the screen with a reflective collimator (104).

Abstract: This invention describes an apparatus, methods and a system for high speed hierarchical multiplexing the native color primaries of SSL-based display systems in order to improve color quality and stability as well as brightness and the efficiency of the display system.

Abstract: A system and method for configuring LED BLU with high NTSC is provided in this invention by using algorithm to compute concentration of multiple phosphors. After the mixed with the LED, an LED BLU with high NTSC can be provided.

Abstract: A method of compensating an OLED display device having light-emitting elements that change with use, comprising the steps of: a) using the device to display images; b) sequentially displaying an ordered series of calibration images, wherein each of the calibration images have one or more corresponding flat fields, at least one of the corresponding flat fields of each calibration image of the ordered series has a different luminance value, and the calibration images are arranged in the ordered series so as to reduce perceived luminance discontinuities; c) measuring and recording current used by the display for each sequentially displayed calibration image; d) calculating compensation parameters based on the measured currents; e) compensating an input image using the compensation parameters; and f) displaying the compensated input image.

Abstract: In an organic light emitting display with a data integrated circuit using the same, a buffer circuit comprises: a first capacitor receiving gradation voltage through a first terminal; a first inverter having an input terminal connected to a second terminal of the first capacitor; a second capacitor having a first terminal connected to an output terminal of the first inverter; a second inverter having an input terminal connected to a second terminal of the second capacitor; a third capacitor having a first terminal connected to an output terminal of the second inverter; and a first transistor connected to a second terminal of the third capacitor and controlling current flowing from a first power source to a data line so as to supply the gradation voltage to the data line in correspondence to the voltage supplied by the third capacitor. With this configuration, the gradation voltage is supplied regardless of the threshold voltages of the transistors.

Abstract: Embodiments of the present invention include circuits and methods for electrical current control. In one embodiment, a regulator provides power to the anode end of a set of LED strings. A current setting circuit derives its current from a current reference and generates multiple matching currents that drive the low side (cathode end) of the set of LED strings. The current setting circuit also contains a feedback signal to the regulator that helps maintain a desired voltage level to the anode end of the LED strings. This embodiment is designed to be expandable and drive any number of LED strings. The present invention may be implemented with a high or low side driver scheme to drive the current. Also, the present invention may be implemented with bipolar, nmos, pmos, or any device that operates as a transistor.

Abstract: A driving arrangement for a plurality of light emitting diodes (LEDs), comprising a first power supply line (Vcc), a second power supply line (GND) and a set of signal lines (1a, 1b, 1c) for carrying brightness intensity and or chromatic information for the plurality of light emitting diodes (54). In a first possible configuration of use, the first (Vcc) and second (GND) power supply line jointly supply power to an “active” lighting source and the light emitting diodes (54) are driven as a function of the brightness intensity information provided via the signal lines (1a, 1b, 1c). In a second possible configuration of use for driving a “passive” source, the second power supply line (GND) is not used and the brightness of the light emitting diodes (54) is controlled by switching signals applied via the first power supply line (Vcc) and the set of signal lines (1a, 1b, 1c).

Abstract: The invention provides a display device and a light adjusting method thereof capable of carrying out light adjustment effectively by the output control of a light source and, preferably, of effecting light adjustment according to color distribution of a displayed image. The display device of the invention that is capable of adjusting a displayed image by changing light flux can include a plurality of light sources having light emitting diodes, an image analyzing unit for outputting a light control signal for controlling the output of each of the light sources, based on an image signal of the displayed image, and a light control device for controlling the output of each of the light sources based on the light control signals.

Abstract: A display device includes: a plurality of pixels; a signal controller generating data accumulations for current image data for the pixels based on an accumulation of input image data, calculating modification coefficients according to the data accumulations, and modifying the current input image data based on the modification coefficients to generate modified image data; and a data driver generating data voltages corresponding to the modified image data and supplying the data voltages to the pixels.

Abstract: A method for adjusting white balance includes generating a first matrix according to values in axes of a color gamut corresponding to optical characteristics of a plurality of first LEDs; generating a second matrix according to values in the axes of the color gamut corresponding to optical characteristics of the plurality of first LEDs while in white balance; generating a third matrix according to values in the axes of the color gamut corresponding to optical characteristics of a plurality of second LEDs; storing the first matrix, second matrix, and third matrix; generating a calibration matrix by multiplying the second matrix with an inverse of the first matrix; generating a fourth matrix by multiplying the third matrix with the calibration matrix. As a result, the optical characteristics of the plurality of second LEDs can be effectively and rapidly adjusted simply referring to the differences between the second and fourth matrices.

Abstract: A method, equipment and frequency converter for displaying information on a moving object, the information being displayed using a light source row arranged to the moving object. The method comprises the steps of generating the information to be displayed; controlling the movement of the moving object by the frequency converter; generating control data for the light source row in accordance with information obtained from the frequency converter on the motion state of the moving object and the information to be displayed; and controlling the light sources in the light source row arranged to the moving object in accordance with the control data.

Abstract: An apparatus and method for controlling the emitted color of visible light according to the current communication state in a visible light communication (VLC) device. The method includes storing one or more communication states and emitting colors that are correspondingly matched to the one or more communication states to indicate each of the various communication states. The VLC also checks, which can be based upon selection of a VLC mode, the current communication state and an emits a color that corresponds to the current communication state and emits the checked color of light to provide a visible light signal that indicates communication status to a user.

Abstract: A light emitting display increases the lifetime of a light emitting element by reverse biasing the light emitting element without using an additional power source and a power source line. The light emitting element is reverse biased without using the power source and the power source line for the reverse bias because a low level light emitting scan signal is used. The aperture ratio, contrast ratio, and lifetime of the light emitting display are increased.

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: A light emitting apparatus comprises at least two light emitting elements with different chromaticities; and a light emitting element controller that controls light emitted from the light emitting apparatus so as to be a desired chromaticity. The light emitting element controller controls the light emitting elements based on a predetermined function of light emitting element temperature variation. Accordingly, it is possible to provide a light emitting apparatus that, even if the temperature varies, has a stable desired chromaticity without chromaticity variation. In addition, since control is performed based on a property function of wavelength fluctuation due to light emitting element temperature variation, it is possible to provide more reliable reproduction characteristics, and a desired chromaticity.

Abstract: A composite display is disclosed. In some embodiments, a composite display includes a paddle configured to sweep out an area, a plurality of pixel elements mounted on the paddle, and one or more optical sensors mounted on the paddle and configured to measure luminance values of the plurality of pixel elements. Selectively activating one or more of the plurality of pixel elements while the paddle sweeps the area causes at least a portion of an image to be rendered.

Abstract: Systems for displaying images are provided.

Abstract: A method of converting a three-or-more-color-component image input signal to an image output signal includes acquiring an input signal having a plurality of pixel signals, each pixel signal having three, or more, color components; determining a residual difference for each color component of each pixel signal; determining a limit value of the residual differences; calculating a common scale factor for each of the color components based upon the limit value; and applying the common scale factor to the image input signal to produce the image output signal.

Abstract: In a light emitting apparatus, all pixels are fabricated using monochrome light-emitting materials. Since the light transmittances of color filters or color conversion layers are not uniform among red (R), green (G), and blue (B), exact white color cannot be displayed. In the present invention, dots for producing these colors of light, i.e., red (R), green (G), and blue (B), are arranged parallel to writing scan lines and to erasing scan lines. The brightnesses are made uniform by controlling the emission times of the emitted colors of light. According to the brightnesses obtained after passage through the colored layer with the lowest light transmittance, the emission times of colors of light passed through the other colored layers are shortened. Thus, as the brightness differences after passage can be reduced, the light emitting apparatus can display exact white color.

Abstract: A light source panel according to an embodiment includes a plurality of light-emitting parts having a plurality of light-emitting substances to be divided into a predetermined number of partial areas. A light source driving part provides each of the light-emitting substances with a current. An adaptive dimming control part receives an image signal from an external device and sets the light-emitting parts into a first dimming block corresponding to a first color class of the first image signal or a second dimming block corresponding to a second color class of the first image signal to control the backlight assembly, in order to prevent color artifacts from being generated at a boundary area between the first dimming block and the second dimming block, the adaptive dimming control part controlling the backlight assembly, so that the first dimming block performs a second dimming operation.

Abstract: A display for generating changing or still images is shown and described. The display includes a plurality of display light emitting diodes (LEDs), each display LED generating light at an intensity related to current applied thereto. The display further includes a circuit which controls the current applied to each display LED to generate at least a portion of an image on the display, wherein the current is changed to change the portion of the image. The display yet further includes at least one reference LED coupled to the circuit, wherein the circuit applies a current to the reference LED dependent upon the current applied to at least one display LED, the circuit periodically applying a reference current to the reference LED.

Abstract: A display unit includes: a display section including a plurality of pixels, each of the pixels including a plurality of light-emitting devices; an operation section that performs calculations for correcting drive signals to be inputted into the light-emitting devices of the pixels included in the display section in order to correct luminances and chromaticities of the pixels; and a coefficient data input section where a bit number of an element having smaller variations in coefficient in the display section, among elements of each of coefficient matrixes necessary for the correction calculations, the coefficient matrixes to be inputted into the operation section, is set to a value smaller than a bit number of an element having larger variations.

Abstract: A display including a plurality of discrete pixel means supported on cables and arranged to form a display of a size not possible with prior art. Advantageously the cables are also used to distribute power and data to the pixels. The pixel means may also include a processor and sensing means that enable the pixel means to operate with significant autonomy.

Abstract: A display controller which outputs a grayscale clock signal for specifying a change point of a pulse width modulated signal. The display controller includes: a grayscale clock generation section which generates a grayscale clock signal having first to Nth (N is an integer greater than one) grayscale pulses within a predetermined period starting from a reference timing; and first to Nth grayscale pulse setting registers for setting edges of the first to Nth grayscale pulses. The grayscale clock generation section sets an interval between the reference timing and an edge of the first grayscale pulse and an interval between edges of the (i?1)th grayscale pulse (2?i?N, i is an integer) and the ith grayscale pulse, based on values set in the first to Nth grayscale pulse setting registers, and outputs the grayscale clock signal having the first to Nth grayscale pulses.

Abstract: Disclosed herein is a method for driving an image display apparatus including: an image display panel whereon pixels each having first to third sub-pixels are laid out in first and second directions to form a 2-dimensional matrix, at least each specific pixel and an adjacent pixel adjacent to the specific pixel in the first direction are used as first and second pixels respectively to create one of pixel groups, and a fourth sub-pixel is placed between the first and second pixels in each of the pixel groups; and a signal processing section configured to generate first to third sub-pixel output signals for the first pixel on the basis of respectively first to third sub-pixel input signals and to generate first to third sub-pixel output signals for the second pixel on the basis of respectively first to third sub-pixel input signals.

Abstract: A bar-top refrigerated liquid dispenser in which one or more housing walls include integrated back-lighted billboard display panels having side edges with embedded light emitting diodes and other edges with associated reflectors.

Abstract: An image display apparatus includes a light emitting element that emits light depending on an injected electric current; a driver that includes at least a first terminal and a second terminal, and controls the light emitting element based on a potential difference, applied between the first terminal and the second terminal, of a level higher than a predetermined threshold; a storage capacitor that serves to retain a potential on the first terminal of the driver; and a controller that changes the potential on the first terminal via the storage capacitor at writing of electric data current corresponding to a display in a black level.

Abstract: An inexpensive light emitting device capable of displaying a bright image and an electric appliance using the light emitting device. In the light emitting device having a pixel portion and a driver circuit formed on one insulating member, all of semiconductor elements for the pixel portion and the driver circuit are formed by n-channel semiconductor elements, thereby enabling the manufacturing process to be simplified. Each of light-emitting elements provided in the pixel portion emits light in such a direction that most of the light travels away from the insulating member, so that substantially the whole of the pixel-forming segment electrode (corresponding to a cathode of an EL element) is formed as an effective light-emitting area. Therefore, a low-priced light-emitting device capable of displaying a bright image can be obtained.

Abstract: To provide a current output type semiconductor circuit and a display device which are capable of realizing a reduction in cost by reducing the number of output stages and reducing a chip area. A display device includes three reference current generating units which generate reference currents corresponding to three display colors and outputs the reference currents, a selector which outputs an optimum reference current among the outputs of the three reference current generating units according to a display color of display data in response to a changing display color switching signal, a current output unit which outputs a current corresponding to a value of the display data with respect to a current per one gradation determined by the reference currents, and a selector for distributing the output of the current output unit to respective source signal lines corresponding to the display color.

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 display unit is provided. The display unit includes a light-emitting diode, a driving transistor, and a power supply system. The light-emitting diode comprises a cathode and an anode. The driving transistor comprises a source, a drain, and a gate, wherein the gate receives a first voltage, the drain is coupled to a second voltage via the light-emitting diode and the gate receives a third voltage. The power supply system is coupled to the drain of the driving transistor, providing the second voltage in response to the voltage of the drain of the driving transistor.

Abstract: A content-adaptive adjustment system and method for a light-emitting display is disclosed. An analysis unit analyzes, for example, the average data intensity/power consumption and the data distribution of the image data to be displayed. An adjustment unit then adjusts, for example, the pixel values of the image data or the drive levels of the light-emitting display according to the analyzed data distribution, such that the consumed power in the light-emitting display could be considerably reduced.

Abstract: A device for generating at least blue light comprises a control circuit (4) which receives a control signal (CS) defining a variation of a spectrum of the blue light to control a photo-biological effect of a vertebrate. Therefore, first blue light (BL1) is generated with a first predominant wavelength (PW1) having a first photo-biological effect, or second blue light (BL2) is generated with both a second predominant wavelength (PW2), being shorter than the first predominant wavelength, and a third predominant wavelength (PW3), being longer than the first predominant wavelength; the second blue light (BL2) has a second photo-biological effect different from the first photo-biological effect, while the first blue light (BL1) and the second blue light (BL2) have substantially identical colors and intensities.

Abstract: A pixel driving circuit with threshold voltage and EL power compensation. The pixel circuit includes a storage capacitor, a transferring circuit, a driving element, and a switching circuit. The transferring circuit transfers a data signal or a variable reference signal to a first node of the storage capacitor. The driving element has a first terminal coupled to a first fixed potential and a second terminal coupled to a second node of the storage capacitor. The switching circuit is coupled to a third terminal of the driving element and the second node of the storage capacitor. The switching circuit can be controlled to make the driving element diode-connected in one time period and allowing a driving current to be output to a display element in another time period.

Abstract: A lighting device including a supporting member, a light emitting element disposed on the supporting member, and emitting light from an upper and side surfaces thereof, a first fluorescent layer containing an organic phosphor and disposed on the supporting member, and a second fluorescent layer containing only an inorganic phosphor and disposed on the supporting member, wherein the second fluorescent layer is disposed to cover the upper and side surfaces of the light emitting element, and the first fluorescent layer is disposed on at least side surface of the light emitting element with the second fluorescent layer being interposed between the light emitting element and the first fluorescent layer.

Abstract: A light-emitting unit capable of setting an address easily and reliably and checking the result of address setting. The light-emitting unit, such as an LED unit that constructs the unit of light emission of a display unit or the unit of light emission of an ornamental display, includes an infrared receiving element that receives data including an address transmitted by infrared light; an address storage section that stores the address; and a controller that recognizes an address from the data and stores the address in the address storage section. Preferably, the controller stores the light-emission patterns of a display LED for a normal address setting and an erroneous address setting, wherein when normal setting is recognized, the display LED emits light in a normal-setting emission pattern, and when an error is recognized, the display LED emits light in a error-setting emission pattern.

Abstract: A pixel circuit includes a light emitting device, a storage device configured to represent a level of illumination, and a driving device used to drive the light emitting device. Configuring the storage device includes changing a voltage difference across the storage device to a level larger than a threshold voltage of the driving device. The driving device reduces driving of the light emitting device while the storage device is being configured. After the storage device has been configured, the driving device is permitted to drive the light emitting device to emit light having a luminance level corresponding to the level of illumination represented by the storage device.

Abstract: A double-faced light emitting diode display includes a pair of parallel shield panels (20, 20?), and a light emitting module (30) located between the shield panels. Each shield panel includes a video contrast enhancement assembly. The light emitting module includes an opaque insulative substrate (31) with a pair of pixel matrixes symmetrically formed on opposite surfaces (310, 310?) thereof and a circuit driving system formed at at least one of the surfaces. Each pixel matrix includes a plurality of pixel units (320, 320?). Symmetrically opposite pairs of pixel units are electrically interconnected so that the shield panels can simultaneously display same images. The double-faced light emitting diode display has a simple structure, a small size, low cost and full color display capability, and can be advantageously applied in traffic signal boards, large-scale display boards, surround cinemas and so on.

Abstract: A flat panel display with good color mixture of three primary colors to achieve different hues and little signal delay is provided. The display includes signal lines including scan lines and data lines intersecting the scan lines, both arranged along straight lines. Red, green, and blue pixel driving circuit regions are defined by the intersection of the scan lines and the data lines. The pixel driving circuit regions having the same color are arranged adjacent to one another along a column direction. Red, green, and blue pixel driving circuits are placed in the pixel driving circuit regions and are coupled to the red, green, and blue pixel electrodes. The pixel electrodes are adjacent to pixel electrodes of a different color along both row and column directions.

Abstract: An electronic display panel having a combination of aligned and connected forwardly located panels to which a plurality of rearwardly located LED modules easily and readily secure using three-point attachment to form an electronic display panel suitable for accommodation by and for securing to the structure and framework of a sign system. Configured spacer brackets offer mutual spaced support between the front and rear panels and are constructed using arcuate geometry for dimension minimalizing to prevent interference with the viewing of the LED pixels. Notches are located along the bottom edge of the electronic display panel for simple engagement, such as with an arcuate surface of a pivot bar incorporated in a lower structure of a sign system.

Abstract: The present invention relates to a light-emitting diode (“LED”) display apparatus used for a display such as a type of standing signboard. The light-emitting diode display is comprised of light-emitting diodes which use a plurality of colors, including blues, reds and greens, arranged in a specific pattern such as a matrix pattern. The display is appropriate for displaying either a moving or a stationary graphical image by powering the LEDs to combine to produce specific colors.

Abstract: A color curve control circuit includes: a data input unit, for entering values for changing colors on the screen of a monitor; a microcomputer, for processing color signals corresponding to color temperature using stored color temperature data and a color curve control program, in order to change the colors on the screen according to signals generated by the data input unit, and for generating color gain signals and color cutoff signals; and a digital to analog converter for converting the digital color gain and cutoff signals from the microcomputer into analog signals.