32results about How to "Maximize luminance" patented technology

An optical manifold for efficiently combining a plurality of LED outputs into a single, substantially homogeneous output, in a small, cost-effective package. The optical manifolds can be used to combine multiple LEDs of the same color and provide a high intensity output aperture with very high uniformity and sharp borders, or they can be used to generate a multiwavelength output, such as red, green, and blue LEDs that are combined to generate white light. Embodiments are also disclosed that use a single or multiple LEDs and a remote phosphor and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. The optical manifolds are designed to alleviate substantial luminance inhomogeneities inherent to LEDs. The optical manifold utilizes principles of non-imaging optics to transform light and provide directed, substantially uniform light sources.

An optical manifold for efficiently combining a plurality of LED outputs into a single, substantially homogeneous output, in a small, cost-effective package. The optical manifolds can be used to combine multiple LEDs of the same color and provide a high intensity output aperture with very high uniformity and sharp borders, or they can be used to generate a multiwavelength output, such as red, green, and blue LEDs that are combined to generate white light. Embodiments are also disclosed that use a single or multiple LEDs and a remote phosphor and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. The optical manifolds are designed to alleviate substantial luminance inhomogeneities inherent to LEDs. The optical manifold utilizes principles of non-imaging optics to transform light and provide directed, substantially uniform light sources.

An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.

There are provided a light emitting device package and a method for manufacturing the same. The light emitting device includes: a plurality of barriers provided above a metal circuit board; a plurality of light emitting devices placed in a space between the barriers; and a lens unit provided at an upper side of the barrier. Accordingly, the plurality of light emitting devices can be conveniently seated as a module format, and a luminance can be increased. Also, an efficiency of heat sink can be increased.

An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.

One aspect of the present invention relates to a new alternative to the Bayer pattern for spatial subsampling in color imaging applications. One aspect of the present invention relates to a new design paradigm for spatio-spectral sampling, which is also described. The proposed scheme offers the potential to significantly reduce hardware complexity in a wide variety of applications, while at the same time improving output color image quality. According to another aspect, it is realized that conventional processing techniques are subject to diminishing returns, and with the exception of the most sophisticated processing techniques generate imperfections perceptible to a practiced eye. According to one aspect, a framework for CFA design in presented. In one embodiment the physical characteristics of the CFA are generated so that the spectral radii of luminance and chrominance channels are maximized. In another embodiment, the CFA designed to subject to the conditions of perfect reconstruction. In one aspect, the physical characteristics of CFA design are constrained to require physically realizable CFA(s). Alternatively, certain physical characteristics can be emphasized to generate easier to manufacture CFA(s). According to another aspect, conventional methods and systems are evaluated, confirming shortcomings regarding aliasing in imaging and bandwidth, against which certain embodiments are benchmarked, showing improved performance under at least some embodiments of proposed designs and methods. According to another aspect, a display device CFA is evaluated in terms of throughput of stimuli as limited by aliasing. It is shown the spectral replicas of the chrominance signals induced by existing CFA patterns are centered around frequencies that are not sufficiently far from the DC, consequently overlapping with the luminance signal spectrum and reducing the throughput of the stimuli. By reinterpreting the interactions between the stimuli, display CFA, and CSF in terms of amplitude modulation, an alternative CFA coding scheme that modulates the chrominance signals to a higher frequency relative to common schemes is provided in some embodiments.

There are provided a light emitting device package and a method for manufacturing the same. The light emitting device includes: a plurality of barriers provided above a metal circuit board; a plurality of light emitting devices placed in a space between the barriers; and a lens unit provided at an upper side of the barrier. Accordingly, the plurality of light emitting devices can be conveniently seated as a module format, and a luminance can be increased. Also, an efficiency of heat sink can be increase.

Disclosed is a lighting device which comprises: an optical member comprising a protruding optical pattern forming a gap with an adjacent layer; at least one light emitting unit inserted into the optical member; and a resin layer formed on the optical member and the at least one light emitting unit, whereby it is possible to obtain an effect that the shapes of light change depending on the viewing angle when viewing the light source by producing various protruding optical patterns, an effect that the whole thickness can be reduced, and an effect that the degree of design freedom can be enhanced when designing products thanks to an enhanced flexibility.

Disclosed is to decrease a fabrication cost and reduce a thickness of a liquid crystal display device by processing light transmitted through a liquid guide plate by virtue of a single optical sheet, the optical sheet including a base film, a plurality of prism patterns extending from one side to another side of the base film, and refraction layers between the prism patterns, thereby totally reflecting light incident from the light guide plate to be supplied to a liquid crystal display panel.

Presented are new alternatives to the Bayer pattern for spatial subsampling in color imaging. One aspect relates to a new design paradigm for spatio-spectral sampling The proposed scheme offers the potential to significantly reduce hardware complexity in a wide variety of applications, while at the same time improving output color image quality. In some embodiments, a framework for CFA design in presented. In one embodiment the physical characteristics of the CFA are generated so that the spectral radii of luminance and chrominance channels are maximized. The physical characteristics of CFA design are constrained to require physically realizable CFA(s). Alternatively, certain physical characteristics can be emphasized to generate easier to manufacture CFA(s). By reinterpreting the interactions between the stimuli, display CFA, and CSF in terms of amplitude modulation, an alternative CFA coding scheme that modulates the chrominance signals to a higher frequency relative to common schemes is provided in some embodiments.

A light emitting diode module for a line light source includes a circuit board having a wire pattern formed thereon and a plurality of LED chips directly mounted and disposed in a longitudinal direction on the circuit board and electrically connected to the wire pattern. The module also includes a reflecting wall installed on the circuit board to surround the plurality of LED chips, reflecting light from the LED chips. The module further includes a heat sink plate underlying the circuit board to radiate heat generated from the LED chip.

The invention provides a transflective liquid crystal display device capable of obtaining a high contrast display in a transmissive display and a reflective display. In particular, in a liquid crystal display device according to the invention, a reflective display region and a transmissive display region can be formed in one pixel region, a reflection layer is provided on an array substrate in the reflective display region, an inclined region, in which the thickness of a liquid crystal layer varies consecutively between the transmissive display region and the reflective display region, is provided between the transmissive display region and the reflective display region, an edge of the inclined region at the transmissive display region side being formed in a plane region of the reflection layer, a first color material layer is formed in the reflective display region, and a second color material layer is formed in the inclined region and the transmissive display region, the degree of coloration of the second color material layer being higher than that of the first color material layer. The first color material layer and the second color material layer may overlap each other in the plane region of the inclined region.

There are provided a light emitting device package and a method for manufacturing the same. The light emitting device includes: a plurality of barriers provided above a metal circuit board; a plurality of light emitting devices placed in a space between the barriers; and a lens unit provided at an upper side of the barrier. Accordingly, the plurality of light emitting devices can be conveniently seated as a module format, and a luminance can be increased. Also, an efficiency of heat sink can be increase.

Chromic luminescent compositions, and methods for the preparation and use of thereof, combining luminescent and non-luminescent materials that are capable of modulating color and brightness and frequency as a function of incident electromagnetic radiation intensity (dynamic camouflage) in combination with binders have been developed which do not have a detrimental effect on the hand of the textiles, fabrics and other materials to which it is applied.

A bottom emission type electroluminescent display in which light emitted from a light emitting layer undergoes constructive interference between a first electrode and a second electrode. The bottom emission type electroluminescent display has a transparent substrate, a first electrode and a second electrode. The first electrode and the second electrode are formed on the same side of the transparent substrate. The electroluminescent display also has a medium layer interposed between the first electrode and the second electrode and includes a light emission layer that emits light when the first electrode and the second electrode are electrically driven. The first electrode is formed as a translucent conductive layer that partially reflects the light emitted from the light emission layer and the second electrode is formed as a reflection layer that reflects the light emitted from the light emission layer.

A method of printing an image using a printing system having first and second overlapping printhead segments. The method includes the steps of: (i) identifying a strip of the image to be printed in an overlap region of the first and second printhead segments; (ii) identifying a foreground image and a background image for image content contained in the strip; (iii) determining a seam in the foreground image; (iv) printing the foreground image using only nozzles from the first printhead segment at one side of the seam and only nozzles from the second printhead segment at the other side of the seam; and (v) printing the background image using nozzles from both the first and second printhead segments across the overlap region.

There are provided a light emitting device package and a method for manufacturing the same. The light emitting device includes: a plurality of barriers provided above a metal circuit board; a plurality of light emitting devices placed in a space between the barriers; and a lens unit provided at an upper side of the barrier. Accordingly, the plurality of light emitting devices can be conveniently seated as a module format, and a luminance can be increased. Also, an efficiency of heat sink can be increase.

The invention provides a transflective liquid crystal display device in which display is bright, with high contrast, and with less dependence on the viewing angle in the transmissive display mode. A liquid crystal display device includes a liquid crystal cell, the liquid crystal cell including an upper substrate, a lower substrate, a liquid crystal layer between the upper and lower substrates, and a transflective layer on the inner surface of the lower substrate. The liquid crystal display device further includes a first elliptical polarizer elliptical polarized light from the upper substrate being incident on the liquid crystal layer; and a second elliptical polarizer, elliptical polarized light from the lower substrate being incident on the liquid crystal layer. Only the first elliptical polarizer has a liquid crystal film in which a hybrid alignment is fixed.

An input / output device includes a pixel area; a light emission circuit provided in the pixel area and configured to emit light; and a photodetection circuit provided in the pixel area and configured to generate a voltage having a value corresponding to an intensity of incident light. The light emission circuit includes a drive transistor and a light emitting element. The light emitting element includes a first current terminal electrically connected to the source or the drain of the drive transistor and a second current terminal to which a first voltage is input, and emits light in accordance with a current flowing between the first and second current terminals. The light emission circuit includes a switching element including a first terminal to which a second voltage is input, and a second terminal electrically connected to the first current terminal of the light emitting element.

A semi-transmission type liquid crystal display that maximizes the luminance in reflection mode and transmission mode. The liquid crystal display comprises a lower substrate with thin film transistors, an opposite substrate facing the lower substrate, a liquid crystal layer between the lower substrate and the opposite substrate, a reflection electrode formed in a reflection area of the lower substrate, a transparent electrode formed in a transparent area of the lower substrate, a common electrode formed on the opposite substrate, and a drive circuit for applying a voltage between the reflection electrode and the transparent electrode and the common electrode. The potential difference between a drive voltage applied to that surface of the lower substrate which contacts the liquid crystal layer and a drive voltage applied to that surface of the opposite substrate which contacts the liquid crystal layer is lower in the transparent area than in the reflection area.

An input / output device includes a pixel area; a light emission circuit provided in the pixel area and configured to emit light; and a photodetection circuit provided in the pixel area and configured to generate a voltage having a value corresponding to an intensity of incident light. The light emission circuit includes a drive transistor and a light emitting element. The light emitting element includes a first current terminal electrically connected to the source or the drain of the drive transistor and a second current terminal to which a first voltage is input, and emits light in accordance with a current flowing between the first and second current terminals. The light emission circuit includes a switching element including a first terminal to which a second voltage is input, and a second terminal electrically connected to the first current terminal of the light emitting element.

A method of printing an image using a printing system having first and second overlapping printhead segments. The method includes the steps of: (i) identifying a strip of the image to be printed in an overlap region of the first and second printhead segments; (ii) determining a continuous seam in the strip based on a cost function, the cost function including a parameter selected from the group consisting of: (a) minimizing a density of printed ink along the seam; and (b) maximizing a luminance along the seam; and (iii) printing the image using the first and second printhead segments, the printing including stitching the first and second printhead segments across the seam. The strip contains variable image content and the seam has a varying position within the strip.

A power supply control device and a method for controlling the power supply of light sources, preferably light-emitting diodes (LEDs). The power supply device allows the thermal management of LEDs without requiring the use of a programmable DC-to-DC converter, but by systematically adjusting an automatic control value for the DC-to-DC converter used.

Different liquid crystal twist angles realize different luminescence efficiencies for reflection and transmission regions, respectively. Therefore, the difference of liquid crystal twist is used in reflection and transmission region, respectively, of a liquid crystal display to maximize their luminescence efficiency so that the total luminescence may reach the optimum state.

A power supply control device and a method for controlling the power supply of light sources, preferably light-emitting diodes (LEDs). The power supply device allows the thermal management of LEDs without requiring the use of a programmable DC-to-DC converter, but by systematically adjusting an automatic control value for the DC-to-DC converter used.