Samsung Electronics Co., Ltd.

Samsung Display Co., Ltd.

Pu-lyong National University Industry-university Foundation

Byung-Choon Yang

Gi-Cherl Kim

Se-Ki Park

Byoung-Dae Ye

Seok-Hyun Nam

Dong-Min Yeo

Young-Jun Seo

Sang-Yu Lee

Joo-Woan Cho

Ju-Young Yoon

Young-keun Lee

Sang-chul Byun

Yong-Hoon Kwon

Si-Joon Song

Eui-Jeong Kang

Young-Min Park

Seong-Sik Choi

Chi-O Cho

Du-Hwan Chung

Myeong-ju Shin

Eun-Jeong Kang

Hyo-Sun Kim

Si-joon Song

Seung-Hwan Baek

Eun-Chae Jeon

Young-Sic Kim

Gi-Cheri Kim

Jeom-Oh Kim

Yeong-Bae Lee

Jong-Su Kim

Kwang-Won Park

Yun-Hyoung Park

Ji-Su Yu

Hyung-Seok Lim

Sang-Chul Byun

A transparent display device includes a transparent display panel which displays an image, a scan driver which provides a scan signal to the transparent display panel, a data driver which driver converts image data into a data signal based on an applied gamma curve and provides the data signal to the transparent display panel, a timing controller which controls the scan driver and the data driver, and a gamma curve adjuster which adjusts the applied gamma curve based on a reference gamma value of a reference gamma curve, luminance of incident light that enters the transparent display panel, light transmittance of the transparent display panel, and panel-luminance of the transparent display panel.

Transparent display device and method of compensating an image for the same

A method of compensating color of a transparent display device includes generating a first pixel data by adding an input image pixel data and an external optical data which represents an effect of an external light on the transparent display device, generating a second pixel data having the same color as the input image pixel data by scaling the first pixel data, and generating an output image pixel data by subtracting the external optical data from the second pixel data.

Method of compensating color of transparent display device

A silicate phosphor composition is provided having a &#x3b3;-phase of an orthorhombic crystal structure whose space group is Pbnm 62, and whose composition is represented by the following chemical formula:CaMSiOCeN(0&#x2266;&#x3c;0.5,0&#x3c;&#x2266;0.1,0&#x2266;&#x3c;0.15) In the formula, M represents at least one member selected from the group consisting of Mg, Sr, Ba, Zn, Na, Al, Ga, Ge, P, As and Fe, and N represents at least one member selected from the group consisting of Eu, Mn, Tb, Yband Tm. The silicate phosphor has a maximum absorbance for a wavelength of about 450 nm to about 475 nm corresponding to a main part of a blue excitation light, and has a great stability at a high temperature. As such the silicate phosphor may be used in combination with a blue light source to produce a white light.

Silicate phosphor, method of manufacturing silicate phosphor, and light-generating device having silicate phosphor

A display device comprises a optical member, a plurality of light sources to illuminate the optical member, a representative determining part to determine representative values of image blocks based on image signals applied to the image blocks, wherein the image blocks are arranged in a matrix and correspond to portions of a display panel, a representative integration part to integrate the representative values of the image blocks in one of a row and a column direction of the matrix and determine integrated representative values, and a light control part to control the plurality of light sources based on the integrated representative values.

Display device and driving method thereof

A liquid crystal display (LCD) includes: a light source unit to provide light to a liquid crystal panel and includes first point light sources and second point light sources; a first timing controller to transmit a first image signal and a second image signal to the liquid crystal panel; a second timing controller to transmit optical data, which includes first information to turn on the first point light sources and the second point light sources at different times; and a light source driver to control the first point light sources and the second point light sources to be turned on and off according to the optical data. A method of driving an LCD includes turning on and off first and second point light sources according to received first and second image signals.

Liquid crystal display and method of driving the same

A backlight unit assembly, a liquid crystal display having the same, and a dimming method thereof are provided. The dimming method for a liquid crystal display includes setting a plurality of lookup tables, each lookup table having different data for adjusting luminance corresponding to a same grayscale, calculating a grayscale average of a whole liquid crystal display panel and grayscale averages of individual liquid crystal display panel blocks with respect to an image signal input to the liquid crystal display panel, selecting one of the plurality of lookup tables in accordance with the whole grayscale average, and calculating the data for obtaining the luminance corresponding to the individual grayscale averages in the selected lookup table, and adjusting and applying power to a light emitting diode assembly using the calculated data. In the case of displaying an image, which is dark on the whole and only a part of which is bright, power is applied with a wider pulse width at the same grayscale, and thus the image can be displayed with a desired luminance to minimize image distortion.

Backlight unit assembly, liquid crystal display having the same, and dimming method thereof

A method of driving a light source, a light source apparatus for performing the method, and a display apparatus having the light source apparatus are disclosed in accordance with one or more embodiments. In the method, a plurality of light source strings connected in parallel is driven by applying a driving voltage to a first terminal of the light source strings. A peak current due to a voltage deviation of each of the light source strings is switch-controlled to uniform an average current of the light source strings. Thus, a peak current flowing through light source strings in accordance with a voltage deviation of the light source strings is switch-controlled, so that an average current of the light source strings may be uniformly maintained. Therefore, a voltage deviation is not consumed as power, so that damage to circuit elements due to heat may be prevented.

Method of driving a light source, light source apparatus for performing the method, and display apparatus having the light source apparatus

A two-dimensional light source includes a base substrate having holes, wires disposed on a lower surface of the base substrate, a light emitting diode (LED) chip disposed on an upper surface of the base substrate, plugs that connect two electrodes of the LED chip to the wires through the holes, a buffer layer covering the LED chip, and an optical layer that is disposed on the buffer layer and has an optical pattern formed at a portion of the optical layer corresponding to the LED chip.

Two dimensional light source using light emitting diode and liquid crystal display device using the two dimensional light source

A method of driving light sources controls amounts of light from light-emitting diode (LED) strings based on pulse signals to operate the LED strings connected in parallel. Voltages are synchronized with the pulse signals at input terminals of control circuits to detect the voltages, the control circuits being connected to the LED strings and controlling resistance variations of the LED strings. The operation of the LED strings is stopped when the detected voltage is out of a predetermined allowable voltage range due to a short-circuited LED. Therefore, a light source device may be protected by stopping the operation of the LED strings.

Method of driving a light source, light source device for performing the same, and display device having the light source device

A method of driving a light source includes; driving a plurality of light source strings in response to a plurality of driving signals, when a light source module having the plurality of light source strings connected in parallel with each other receives a driving voltage, detecting a detection voltage from channel input terminals of a multichannel current control part, wherein the multichannel current control part controls a resistance difference of the plurality of light source strings based on the plurality of driving signals, and controlling a level of the driving voltage via adjusting a current applied to a feedback terminal of a driving voltage generating part, wherein the driving voltage generating part generates the driving voltage.

Method of driving a light source, light source apparatus for performing the method and display apparatus having the light source apparatus

A backlight unit and a display device having a backlight unit are disclosed. The backlight unit includes an LED substrate,. The LED substrate includes a plurality of emission regions. An LED is provided in each emission region. An LED driver drives the LED. An LED controller supplies a dimming control signal to the LED driver. The LED controller is provided on a driving board. A first connection unit is provided in the LED substrate. A second connection unit is provided in the driving board. The second connection unit is capable of coupling with the first connection unit.

Blacklight unit and display device including the same

To drive light-emitting blocks, currents are sensed through the light-emitting blocks arranged in an M&#xd7;N matrix (wherein M and N are natural numbers), wherein M rows are connected to a row switching part and N columns are connected to a column switching part. The light-emitting blocks are driven by a local dimming method with feedback control responsive to the sensed currents.

Feedback control of lighting-emitting blocks in a display apparatus

A backlight unit and a liquid crystal display including the same are provided. The backlight unit includes a circuit board, at least one internal interconnection formed on the circuit board, and a plurality of light emitting devices mounted to be connected with the at least one internal interconnection on the circuit board, each of the plurality of light emitting devices including at least one light emitting chip and at least one driving chip.

Backlight unit and display including the same

The present invention relates to a backlight unit with a light emitting diode block assembly connected thereto, and a liquid crystal display having the backlight unit. In one embodiment, the backlight unit includes a plurality of light source blocks each of which includes a substrate having a light source and an electrode portion formed thereon; a connector electrically connecting the light source blocks to each other, coupled to the light source blocks in contact with one side of the connector, and fastening the light source blocks to each other by cross-coupling the light source blocks; and a supporter disposed on the other side of the connector. In this manner, LED blocks can be simultaneously both electrically and mechanically coupled, using a relatively small and simple number of connectors, facilitating reliability and ease of manufacture.

Light source block assembly and backlight unit and liquid crystal display having the same

A light source driving apparatus includes; a boosting part which boosts an input voltage received from an input part and generates a driving voltage, a boosting transistor which controls an operation of the boosting part, a rectification part connected between the boosting part and an output part and which transmits the driving voltage to the output part, an integrated circuit which generates a gate signal which controls the boosting transistor, and a protection circuit which generates a protection signal which controls a voltage level of the gate signal according to an output current of the boosting transistor.

Growing community of inventors

Seoul, South Korea

Byung-Choon Yang