Samsung Electronics Co., Ltd.

Tsutomu Uemoto

Michiru Senda

Ryoichi Yokoyama

A display substrate includes a plurality of pixels. Each of the pixels includes a switching element, a storage capacitor, a storage line and a pixel electrode. The switching element includes a polycrystalline silicon layer having a channel portion and a doped portion, a gate electrode, a source electrode and a drain electrode. The gate electrode is formed on the channel portion and has a lower layer and an upper layer. The source electrode and the drain electrode make contact with the doped portion. The storage capacitor includes a first storage electrode formed from a layer substantially same as the polycrystalline silicon layer and a second storage electrode formed from a layer substantially same as the lower layer of the gate electrode.

Display substrate, method of manufacturing the same and display apparatus having the same

In a liquid crystal display device includes; a plurality of pixels arranged substantially in a matrix pattern; wherein each of the plurality of pixel includes; first and second thin film transistors including current paths connected to a source line in series, a storage capacitor line, a first capacitor connected between the first and second thin film transistors and connected to the storage capacitor line, a second capacitor connected between one of the source and the drain of the second thin film transistor and a pixel electrode and connected to the storage capacitor line, and a third capacitor including the pixel electrode, a common electrode, and a liquid crystal between the pixel electrode and the common electrode, wherein an overdrive voltage Vover satisfying equation is added to a display signal voltage Vsig and a resultant voltage is applied to the source line.

Liquid crystal display device, method of driving the same, and method of manufacturing the same

A display device that includes a first substrate having pixel electrodes; a second substrate having a color filter corresponding to the pixel electrodes to display images; a photo switching element disposed at the first substrate; a red or green color filter corresponding to the photo switching element formed at the second substrate to sense an amount of external light; a driving controller configured to output a driving control signal responsive to the amount of external light sensed by the light sensing unit; and a light generation unit configured to provide the display unit with an internal light controlled by the driving control signal. This photo sensor is well suited to human-eye luminosity and uses external light to determine how much backlight is needed.

Photo sensor, display panel having the same and display device having the display panel

A luminance control circuit for controlling the luminance levels of different colored light sources that lends itself to easy incorporation into display devices is presented. A light emitting diode (LED) substrate includes a plurality of driving thin film transistors (TFTs) including a semiconductor layer deposited on a substrate. A plurality of LEDs for generating lights of different wavelengths is mounted respectively on the plurality of driving TFTs. A plurality of thin film sensors for sensing the luminous intensities of the plurality of LEDs is formed between the plurality of LEDs and the substrate. A luminance control circuit for controlling the driving TFTs has of a plurality of controlling TFTs including a semiconductor layer deposited on the substrate and is connected to the plurality of thin film sensors.

Light emitting diode substrate, method of manufacturing the same, and liquid crystal display device using the same

A backlight assembly may include a light guide unit, a light source and a reflection module. The light source provides light onto an incident face of the light guide unit. The reflection module may include a first substrate having reflection regions, a lower electrode disposed in each reflection region, a switch element applying an on or off signal to the lower electrode, and an upper electrode. The upper electrode makes contact with or is spaced apart from a reflective face of the light guide unit in accordance with the on or off signal. Thus, light selectively exits the light guide unit through an exiting face of the light guide unit corresponding to each reflection region. A display device has a display module disposed on the exiting face of the light guide unit to display an image. Therefore, the display device has a simplified structure.

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Seoul, South Korea

Tsutomu Uemoto