Abstract: A liquid crystal display (“LCD”) includes: a first substrate; a sensor pad disposed on the first substrate; a second substrate which faces the first substrate; a sensor spacer and a supporting spacer disposed on the second substrate; and a supporting dielectric portion disposed between the supporting spacer and the first substrate. The sensor spacer is spaced apart from the sensor pad, and includes a sensor electrode disposed on a portion of the sensor spacer which faces the sensor pad. The supporting spacer is spaced apart from the first substrate, and the supporting dielectric portion uniformly maintains a cell gap between the first substrate and the second substrate.

Abstract: A light sensing panel includes a scan line transmitting a scan signal, a power source line transmitting a bias voltage, a readout line transmitting a light sensing signal and a light sensing device. The light sensing device includes a control electrode that is electrically connected to the scan line to receive the scan signal, a first current electrode that is electrically connected to the power source line to receive the bias voltage, and a second current electrode that is electrically connected to the readout line to apply a light sensing signal to the readout line when the light sensing signal senses an external light. The light sensing panel requires only one thin film transistor in order to detect a position wherein the external light is incident. Therefore, electrical coupling between devices is reduced and aperture ratio is increased, thereby enhancing a display quality.

Abstract: A method for controlling a backlight luminance in which a reference voltage is set, a sampling voltage is generated based on the reference voltage, and a net photo current signal is generated by a photo current sensing element and a dark current sensing element. The net photo current signal is generated independently of temperature variations. A luminance control signal is generated based on the sampling voltage. The luminance of the backlight assembly is controlled using the luminance control signal. Therefore, variation of the luminance of the backlight assembly may be minimized, although external luminance, temperature, and variation between different photo sensors, the deterioration of the elements, and the like, may be changed.

Abstract: A liquid crystal display apparatus comprising a liquid crystal display panel and a touch panel is disclosed. A first transparent electrode is disposed on an upper surface of the liquid crystal display panel for displaying an image. A second transparent electrode is disposed on a lower surface of a retardation member and the second transparent electrode is opposite to the first transparent electrode. Accordingly, the entire thickness of the liquid crystal display apparatus may be decreased, and the manufacturing cost of the liquid crystal display apparatus may be reduced.

Abstract: A display substrate includes a pixel, first, second and third gate lines, and a source line. The pixel includes first, second and third unit pixels, each generating a different color. The first, second and third gate lines are electrically connected to respective ones of the first, second and third unit pixels. The source line is electrically connected to each of the first, second and third unit pixels. Each of the first, second and third unit pixels includes a common electrode and a respective pixel electrode. The common electrode is formed on a substrate. The pixel electrodes are disposed over the common electrode such that the pixel electrode face the common electrode. Each of the pixel electrodes has a plurality of openings therethrough. This arrangement results in a wider display viewing angle and a reduction in the required number of source driver chips.

Abstract: A method of manufacturing an alignment substrate includes preparing a first substrate on which an alignment film aligned in a first alignment direction is formed; forming a plurality of fluoro-polymer patterns on the first substrate; changing the alignment direction of regions of the alignment film on which the fluoro-polymer patterns are not formed; and removing the fluoro-polymer patterns by using a fluoro-solvent.

Abstract: In a light sensing element having simplified structure, an array substrate having the light sensing element and an LCD apparatus having the light sensing element, the light sensing element includes a first electrode, a control electrode and a second electrode. An alternating bias voltage is applied to the first electrode. An off voltage is applied to the control electrode. The second electrode outputs a light-induced leakage current based on an externally provided light and the bias voltage. Therefore, the array substrate includes one light sensing switching element corresponding to one pixel so that structure of the array substrate is simplified and opening ratio is increased.

Abstract: A display apparatus may include touch detection circuitry including a light sensing circuit and a physical parameter sensing circuit (e.g., a pressure sensing circuit). The display apparatus may further include processing circuitry implementing a power-saving mode and a normal mode, and configured to generate touch information. An display driver may include a photo sensing circuit and a pressure sensing circuit. An embodiment of the display driver may include: an amplifying unit amplifying a photo sensing signal and a pressure sensing signal; a parallel-to-serial converting unit converting the amplified photo sensing signal and the amplified pressure sensing signal into serial sensing signals; and an analog-to-digital converter converting the serial sensing signals into digital sensing signals, wherein the amplifying unit, the parallel-to-serial converting unit, and the analog-to-digital converter operate in one of a normal mode and a power saving mode according to the pressure sensing signal.

Abstract: In a transflective-type display panel and a display apparatus having the transflective-type display panel, the transflective-type display panel includes a first display substrate, a second display substrate and a liquid crystal layer. The first display substrate includes a first substrate and a common electrode arranged on the first substrate. The second display substrate includes a second substrate having a main pixel area where a plurality of sub pixel areas are formed, a plurality of transmission electrodes formed in the sub pixel areas and coupled with each other, and a reflection electrode arranged in at least one sub pixel area. Thus, the transflective-type display panel improves a viewing angle and a display quality thereof and improves productivity.

Abstract: A display device may include a display panel, a plurality of pixels that are disposed on the display panel, a plurality of sensing units that are disposed on the display panel to generate sensing signals based on touch of the display panel, a sensing signal processor that receives the sensing signals and performs predetermined signal processes to generate sensing data, and a touch detection unit. The touch detection unit may include a first controller that determines, based on the sensing data from the sensing signal process, whether or not there is a touch occurrence of the sensing units and whether or not the sensing signal is in an appropriate state. The touch detection unit may also include a second controller that determines the touch occurrence and touch positions on the sensing units based on the sensing data and controls the sensing signals to be in the desired range.

Abstract: A touch position detecting method, a device using the method, and a touch screen display device having the device are disclosed. A touch sensing unit senses a touch event and outputs a sensing data. A reference update unit updates a reference data with an n-th frame sensing data provided from the touch sensing unit, based on a predetermined update signal. A position detecting unit detects the touch position by using the reference data and an (n+i)-th frame sensing data from the touch sensing unit. Therefore, the touch position is easily detected by determining a difference between the reference data and the sensing data at a certain time.

Abstract: A shift register and a display device having the shift register are provided. The shift register has a plurality of stages which sequentially generate output signals in synchronization with a plurality of clock signals. Each of the stages includes an input unit for receiving a scan start signal or an output signal from a previous stage and outputting the scan start signal or the output signal as a first voltage, a first unit for passing at least two clock signals, a second unit for outputting at least one of the at least two clock signals or a second voltage in response to an output signal from a next stage, and an output unit for generating an output signal synchronized with at least one of the at least two clock signals in response to the outputs of the input unit and the second unit.

Abstract: A display device includes a plurality of first and second sensing data lines; a plurality of first and second sensors connected to the first and second sensing data lines, respectively; a plurality of first signal converters which compare a first sensing data signal with a first reference voltage and output a first sensing output signal; a plurality of second signal converters which compare a second sensing data signal with the first reference voltage and output a second sensing output signal; a first position signal output unit which outputs a predetermined bit of a first position signal; a second position signal output unit which outputs a predetermined bit of a second position signal; a signal output unit which outputs a digital sensing signal in series; and a contact determiner which determines a contact position of the first and second sensors.

Abstract: According to an embodiment of the present invention, a display device may include a display panel, a plurality of pixels disposed on the display panel, a plurality of first sensing units disposed on the display panel and generating first sensing signals in response to a touch exerted on the display panel, and a sensing signal processor configured to process the first sensing signals and generate second sensing signals for a plurality of frames, the sensing signal processor determining whether a touch occurs based on the second sensing signals for the plurality of frames.

Abstract: The present invention relates to a touch sensitive display device, the display device including a display panel unit, a sensing unit formed on the display panel unit, receiving a sensor control signal, and generating a sensor data signal based on a touch exerted on the display panel unit, an output unit generating a sensing signal based on the sensor data signal from the sensing unit, and a compensation unit adjusting the sensor control signal such that the sensing signal is bounded in a predetermined range.

Abstract: The present invention is related to a liquid crystal display. The liquid crystal display includes a display panel, a plurality of pixels formed on the display panel, a sensing unit disposed among the pixels and generating a sensor data signal based on a touch to the display panel, a plurality of image data lines connected to the pixels and transmitting image data signals, and a sensor data line connected to the sensing unit and transmitting the sensor data signal. The sensor data line is separated from an image data line adjacent thereto with respect to the pixel.

Abstract: In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.

Abstract: The present invention relates to a touch sensitive display device, the display device including a display panel unit, a sensing unit formed on the display panel unit, receiving a sensor control signal, and generating a sensor data signal based on a touch exerted on the display panel unit, an output unit generating a sensing signal based on the sensor data signal from the sensing unit, and a compensation unit adjusting the sensor control signal such that the sensing signal is bounded in a predetermined range.

Abstract: A method of economically manufacturing display devices having a matrix of drivable pixels arranged in rows and columns arranged to be driven by IC drivers, including the steps of including a plurality of sensor signal lines in the display device that are selectively connectable to certain of the pixel rows, a plurality of sensor signal lines selectively connectable to certain of the pixel columns, transmitting test signals to test predetermined ones of the rows and columns of pixels, and connecting pixel driving circuits to those display devices exhibiting uniform pixel brightness in response to the test signals.

Abstract: In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.