Samsung Display Co., Ltd.

Hee-Chul Hwang

Jin-Woo Park

Hideo Yoshimura

Sang-Uk Kim

Mu-Kyung Jeon

Joo-Hyung Lee

Dong-Won Lee

Eun-Gyeong Choe

Sang-Jin Pak

Jong-Woong Park

Ja-seung Ku

Jae-Shin Kim

Ji-eun Park

Ji-Gong Lee

Sang-Kwon Ha

Seung-Hyun Moon

My-Kyung Jeon

Min-Jeung Lee

A display device includes a display panel including a pixel block that includes pixels, a degradation sensor for measuring degradation information of the pixel block, and a degradation calculator for accumulating input data provided to each of the pixels and for calculating pixel degradation data of each of the pixels based on accumulated input data and the degradation information.

Display device utilizing a degradation sensor and method of driving the same

A touch sensing method for a touch screen including an image display device with a touch-sensitive screen. The method includes a filtering process that includes calculating an output signal of an nframe from a sensing signal of the nframe output from a touch sensing unit configured to sense touches of the touch-sensitive screen, the calculating using an equation()=()&#xd7;()+(&#x2212;1)&#xd7;[1&#x2212;()],wherein F(n) represents the output signal of the nframe, I(n) represents the sensing signal of the nframe, F(n&#x2212;1) represents an output signal of an (n&#x2212;1)frame, and W(n) represents a filtering coefficient; and outputting the output signal of the nframe to an output end. The filtering coefficient is calculated by an equation wherein R is a scale constant. The touch sensing method has high touch sensitivity in an environment with heavy noise while being capable of correctly detecting touch coordinates.

Touch sensing method, recording medium in which program for realizing the same is recorded, and touch sensing system

A method of operating an organic light emitting diode (OLED) display device and an OLED display using the method are disclosed. In one aspect, input data is received, the input data is converted into mapped data based on random data mapping information, one sub-frame pattern is selected from a plurality of sub-frame patterns based on the random data mapping information, and an image is formed for the display device based on the mapped data and the selected sub-frame pattern.

Method of operating an organic light emitting display device, and organic light emitting display device

A display panel driver including a moving image determining part, a sensing part and a dithering part. The moving image determining part determines whether an input image data represents a moving image or a static image. The sensing part senses a movement of a display apparatus or a user of the display apparatus. The dithering part performs a dithering operation to the input image data when the input image data represents the moving image or when at least one of the display apparatus and the user moves when the input image data represents the static image.

Display panel driver, method of driving display panel using the same and display apparatus having the same

A mobile device including a first display, a second display, a foldable coupling portion for coupling the first display to the second display, an angle sensing unit for sensing a folding angle between the first display and the second display, a direction-of-sight sensing unit for sensing a direction of sight of a user, and a controller for determining whether to use a touch input sensed by either the first display or the second display based on the sensed folding angle and the sensed direction of sight.

Mobile device and method for operating the same

A touch screen panel is disclosed. The touch screen panel includes a pixel unit, a touch sensing unit, and a data driver configured to provide data voltages to the pixel unit and to provide driving signals to the touch sensing unit.

Touch screen panel with integrated touch and data drivers

A touch sensing system comprises: a touch sensing unit which includes regions having predetermined coordinates; and a baseline updating unit for updating a baseline by reflecting sensing signals outputted from the touch sensing unit. The baseline updating unit includes a comparator for calculating difference values between the sensing signal of an n-th frame and the baseline of an n&#x2212;1-th frame for each region, and for comparing the difference values with predetermined reference values. The touch sensing system further comprises an arithmetic unit for setting the baseline of the n&#x2212;1-th frame as the baseline of the n-th frame for a region in which the difference values are larger than the reference values and for the region adjacent to it, and for updating the baseline of the n-th frame by a predetermined arithmetic for a remaining region.

Touch sensing system and driving method thereof

A liquid crystal display device having a built in touch screen including a first substrate having pixel units comprising: a plurality of pixels displaying an image and sensor regions having light sensors formed adjacent to the corresponding pixel units to sense a position of a contacted object; a second substrate disposed on the first substrate, comprising: color filters formed on regions corresponding to the pixel units and first black matrices formed on regions corresponding to the sensor regions of the pixel units; a liquid crystal layer interposed between the first substrate and the second substrate; and a backlight assembly disposed on a bottom portion of the first substrate and providing light to the first substrate and the second substrate. The liquid crystal display device with the built in touch screen determines a point of contact on the touch screen.

Liquid crystal display device with a built in touch screen with light sensor

A liquid crystal display (LCD) with a built-in touch screen includes: a first substrate including a sensor area having a plurality of photosensors; a second substrate positioned over the first substrate, and including a color filter, a light receiving portion, and a transparent electrode layer and a front polarizing plate; an LCD panel including a liquid crystal layer interposed between the first and second substrates; a touch screen driver circuit to measure a capacitance variation sensed through a first sensing line connected to the transparent electrode layer and to calculate a touch area using optical information sensed through a second sensing line connected to the photosensors when a contact object is in contact with the LCD panel, and to output position information of the contact object, sensed by determining whether a touch occurs and whether a multi-touch occurs using the capacitance variation and the touch area.

Liquid crystal display having a built-in touch screen using capacitance and sense lines for detecting a touch position

A liquid crystal display (LCD) with a built-in touch screen includes: a first substrate including a pixel area having a plurality of pixels and a sensor area having a plurality of photosensors; a second substrate positioned over the first substrate, and including a color filter, a light receiving portion, a transparent electrode layer, and a front polarizing plate; an LCD panel including a liquid crystal layer interposed between the first and second substrates; and a touch screen driver circuit to sense a capacitance variation provided through a first sensing line connected to the transparent electrode layer when an object is in contact with the LCD panel, and to output position information of the object, sensed by using optical information sensed through a second sensing line connected the plurality of photosensors when the capacitance variation is greater than or equal to a predetermined threshold value.

Liquid crystal display having a built-in touch screen using capacitance and optical information for detecting a touch position

A flat panel display (FPD) with a photo sensor type built-in touch screen capable of performing a scan operation. The FPD with the built-in touch screen includes a plurality of unit pixels disposed in a display region of the FPD and arranged in pixel groups and photo sensors adjacent to the unit pixels of the respective pixel groups. In a scan operation mode, the plurality of unit pixels in each of the pixel groups sequentially emit light to perform a scan operation using the light emitted from the unit pixels and reflected by a scan object to be scanned to be incident on the photo sensors.

Flat panel display with built-in touch screen and a method of driving the same

A sensor scan driver may include a shift register unit for driving photodiodes, a transmission gate unit for changing a voltage range of sensor scan signals generated by the shift register unit, and a buffer unit for supplying the sensor scan signals supplied from the transmission gate unit to the photodiodes, wherein the transmission gate unit includes first and second transmission gates, each including an electrode adapted to receive an output signal of the shift register unit, another electrode adapted to receive the inverted output signal of the shift register unit, an input terminal coupled to first and second power sources, respectively, and an output terminal coupled to an output terminal of the transmission gate unit.

Sensor scan drivers, flat panel displays with built-in touch screen including such a sensor scan driver, and methods of driving such flat panel displays

A method of detecting a touch point includes detecting an edge image of a finger image from an input image, generating a touch point image utilizing the detected edge image, and calculating coordinates of the touch point from the touch point image. The touch point image may be generated by setting a center at a position separated by a set distance in a gradient direction with respect to a position where the edge image is detected, and generating the touch point image by summing up gradient magnitude values with respect to a set area based on the set center. The coordinates of multiple touch points may be calculated by updating coordinates of the multiple touch points according to the gradient magnitude values accumulatively summed up in the multiple touch points based on a comparison between the coordinates of the multiple touch points and the set distance.

Growing community of inventors

Yongin, South Korea

Hee-Chul Hwang