Abstract: An electroluminescent device comprises a cathode, an anode, and has therebetween a light emitting layer (LEL), the device further containing an electron transport layer (ETL) comprising an anthracene compound on the cathode side of the LEL and an organic electron injection layer (EIL) between the ETL and the cathode comprising a phenanthroline compound, wherein the thickness of the EIL and LEL are such that the ratio of the thickness of the EIL to LEL is greater than 0.125.

Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light-emitting layer wherein the light-emitting layer comprises (a) a 2-arylanthracene compound and (b) a light-emitting second anthracene compound having amino substitution at a minimum of two positions, wherein at least one amine is substituted at the 2 position of the second anthracene compound.

Abstract: A method for controlling an electroluminescent display to produce first and second images for display wherein the second image has reduced luminance to reduce burn-in on the display, includes providing the electroluminescent (EL) display having a plurality of EL emitters, the luminance of the light produced by each EL emitter being responsive to a respective drive signal; receiving a respective input image signal for each EL emitter for each of a plurality of frames; transforming the input image signals for a first frame to provide a plurality of first drive signals to produce an image on the display; and transforming the input image signals for a second frame to a plurality of second drive signals using a dimming transform that operates on the input image signals for each frame to provide a peak frame luminance value for the second frame wherein the dimming transform includes an exponential function.

Abstract: An OLED display with a plurality of pixels for displaying an image having a target display white point luminance and chromaticity, each pixel including three red, green and blue gamut-defining emitters defining a display gamut and a magenta emitter with two of cyan, yellow or white emitters as three additional emitters which emit light within the display gamut; the display including a means for receiving a three-component input image signal; transforming the three-component input image signal to a six component drive signal; and providing the drive signal to display an image corresponding to the input image signal. One embodiment is where the pixels have red, green, blue, cyan, magenta and yellow colored subpixels.

Abstract: Checking failures in transistors including driving transistors, switching transistors, and sampling transistors before light emitting elements are formed in a display device. I-V characteristics including threshold voltage of the driving transistor 10C in one pixel circuit can be detected. In a pixel circuit, the sampling transistor 10A and switching transistor 10D are made conductive and the signal potential is given to the gate electrode of the driving transistor 10C from the signal line DTCm. At this time, the current which flows between the drain electrode and source electrode of driving transistor 10C flows through the switching transistor 10D and a reference potential line Vref_r to a test point, and is measured by a current measuring device connected to the test point.

Abstract: An EL light-emitting element is driven digitally to reduce power consumption using a pixel having three transistors and two capacitors. A reset transistor for diode connection writes the threshold voltage of the drive transistor onto a coupling capacitor. The data voltage plus threshold voltage is then written onto the gate of the drive transistor. This reduces the amplitude of the data voltage required, further reducing power consumption.

Abstract: A radiant energy transfer panel is resized from an array of individually sealed segments by cutting the array along a cut line, thereby damaging some segments by breaking their seals. Other segments adjacent to the damaged segments are left intact. Each segment has two electrodes for power connection. Electrodes of the damaged segments remain electrically connected to electrodes of undamaged segments after cutting. An edge member may be positioned to overlap damaged segments and redirect light from undamaged segments to compensate for the damaged segments. In alternative embodiments, the edge member may be light-blocking. The radiant energy transfer panel may be an electroluminescent panel or a photovoltaic panel.

Abstract: A circuit is provided to drive a controlled current from a drive transistor into one electroluminescent element of a pixel array. The circuit is operable to compensate for threshold voltage variation of the drive transistor, thereby providing improved image quality. The circuit is suitable for implementation with p-channel MOSFETs and a conventional geometry having in order: substrate, TFT layer(s), anode, electroluminescent layer(s), cathode. A driving method for this circuit is provided. A display incorporating this circuit is provided. The circuit is operable to provide an inspection function prior to fabrication of the electroluminescent layer(s). An inspection method is provided.

Abstract: A display device includes a substrate having a display area; row electrodes formed over the substrate in the display area extending in a row direction and column electrodes formed over the substrate in the display area extending in a column direction different from the row direction, the row and column electrodes overlapping to form pixels; wherein the pixels are divided into two or more separate pixel groups, each pixel group having group row electrodes and separate group column electrodes; two or more spaced column driver chiplets located in the display area, each column driver chiplet uniquely connected to a different pixel group wherein in at least one of the column driver chiplets is located between pixel groups, and the two or more spaced column driver chiplets adapted to drive the group column electrodes of the one pixel group; and one or more row driver(s) connected to the row electrodes.

Abstract: An electroluminescent display or lighting product incorporates a panel including a collection of distinct light-emitting elements formed on a substrate. A plurality of distinct local seals are formed below respective individual light-emitting elements or groups of light-emitting elements. Some embodiments combine a metal foil substrate and glass local seals in a flexible bottom-emitting product. The local seal may be used in conjunction with a continuous thin film encapsulation structure. Optical functions can be provided by each local seal, including refraction, filtering, color shifting, and scattering. Each local seal is formed by depositing a low melting temperature glass powder suspension or paste using inkjet technology, and fusing the glass powder using a scanning laser beam having a tailored beam profile. In other embodiments, a lower encapsulation substrate incorporating local window seals is wholly or partially pre-formed.

Abstract: A display, lighting, window, or signage product incorporates a panel including a collection of distinct electro-optical elements formed over a substrate. The substrate is in the form of a matrix with multiple openings that are filled with respective rigid local encapsulation seals. A second set of rigid local encapsulation seals are adhered over the electro-optical elements, so that each electro-optical element has a local seal below it, and another local seal above it. The electro-optical elements may be light-emissive, light-controlling, and/or light-sensing.

Abstract: A circuit is provided to drive a controlled current from a drive transistor into one electroluminescent element of a pixel array. The circuit is operable to compensate for threshold voltage variation of the drive transistor, thereby providing improved image quality. The circuit is suitable for implementation with p-channel MOSFETs and a conventional geometry having in order: substrate, TFT layer(s), anode, electroluminescent layer(s), cathode. A driving method for this circuit is provided. A display incorporating this circuit is provided. The circuit is operable to provide an inspection function prior to fabrication of the electroluminescent layer(s). An inspection method is provided.

Abstract: The rate of reading from a memory for storing display irregularity correction data is lowered. At the time of display, calculation is carried out in a correction calculation section using an input signal and correction data in one or more memory units, and brightness inconsistency correction is carried out. The way in which correction calculation is carried out in the correction calculation section is changed for every frame.

Abstract: An electro-optical panel product comprises a collection of distinct light-emitting elements formed on a substrate. The product may be a display or lighting apparatus, and each electro-optical element may be an OLED. Distinct local seals are formed below respective individual electro-optical elements or groups of electro-optical elements. Some embodiments combine a metal foil substrate and glass local seals in a flexible bottom-emitting product. The local seal may be used in conjunction with a continuous thin film encapsulation structure. Optical functions can be provided by each local seal, including refraction, filtering, color shifting, and scattering. Each local seal is formed by depositing a low melting temperature glass powder suspension or paste using inkjet technology in openings formed in a starter substrate; the glass powder is fused using a scanning laser beam having a tailored beam profile. The lower encapsulation substrate incorporating local window seals may be wholly or partially pre-formed.

Abstract: An electroluminescent display or lighting product incorporates a panel comprising a collection of distinct light-emitting elements formed on a substrate. A plurality of distinct local seals are formed over respective individual light-emitting elements or groups of light-emitting elements. Each local seal is formed by depositing a low melting temperature glass powder suspension or paste, and fusing the glass powder. Fusing may be performed using selective heating by microwave or laser irradiation. Energy absorption may be enhanced by incorporating absorbing particles in the glass powder paste or suspension. The local seal may be used in conjunction with a continuous thin film encapsulation structure. Optical functions can be provided by each local seal, including refraction, filtering, color shifting, and scattering.

Abstract: An apparatus (10) for radiant energy transfer has at least one radiant energy transfer panel (20) having a light-energy transfer surface (21) and a back surface (23). The back surface has a panel electrode (42) for an electrical connection with the at least one radiant energy transfer panel. The panel electrode is conductively coupled to a first member of a separable flexible conductive fastener. A second member of the separable flexible conductive fastener has a power connection electrode. The power connection electrode is conductively coupled to a power device (12). Mechanically engaging the first and second members of the separable flexible conductive fastener connects the panel electrode on the at least one radiant energy transfer panel to the power connection electrode.

Abstract: An OLED display with a plurality of pixels for displaying an image having a target display white point luminance and chromaticity, each pixel including three red, green and blue gamut-defining emitters defining a display gamut and a magenta emitter with two of cyan, yellow or white emitters as three additional emitters which emit light within the display gamut; the display including a means for receiving a three-component input image signal; transforming the three-component input image signal to a six component drive signal; and providing the drive signal to display an image corresponding to the input image signal. One embodiment is where the pixels have red, green, blue, cyan, magenta and yellow colored subpixels.

Abstract: A method of presenting an image on a display device having color channel dependent light emission comprising receiving an image input signal including a plurality of three-component input pixel signals; selecting a reduction color component; calculating a reduction factor for each input pixel signal dependent upon a distance metric between the input pixel signal and the selected reduction color component; selecting a respective saturation adjustment factor for each color component of each pixel signal; producing an image output signal having four color components from the image input signal using the reduction factors and saturation adjustment factors to adjust the luminance and color saturation, respectively, of the image input signal; providing a four-channel display device having color channel dependent light emission; and applying the image output signal to the display device to cause it to present an image corresponding to the image output signal.

Abstract: A method of presenting an image on a display device having color channel dependent light emission comprising receiving an image input signal including a plurality of three-component input pixel signals; calculating a reduction factor for each input pixel signal dependent upon differences in luminance between blue and other color components; selecting a respective saturation adjustment factor for each color component of each pixel signal; selecting a luminance gain; producing an image output signal having four color components from the image input signal using the reduction factors, saturation adjustment factors, and luminance gain to adjust the luminance and color saturation, of corresponding components of the image input signal; providing a four-channel display device having color channel dependent light emission; and applying the image output signal to the display device to cause it to present an image corresponding to the image output signal.

Abstract: A four-color emissive display system comprises a display and a controller. The controller is configured to receive and process a three-color input image signal, and provide a four-color output image signal to the display. The controller comprises units respectively configured to (1) calculate a blue reduction factor for each pixel, dependent on luminance differences between blue and other color components, (2) produce respective saturation adjustment factors for red, green, and blue, (3) apply the blue reduction factor to reduce blue luminance, and apply the saturation adjustment factors to reduce saturation of other colors, (4) produce the output image signal. An optional sensor is operable to provide a control signal to the controller, whereby display power can be reduced. An optional estimating unit is configured to estimate current required to display the input image signal, whereby the output image signal can be adjusted accordingly.