The present disclosure relates to a touch display device, a driving signal output circuit, and a driving signal output method of the touch display device. The present disclosure provides a touch display device, a driving signal output circuit, and a driving signal output method of the touch display device, for selectively outputting to a panel a display driving signal and a touch driving signal, which have different voltage levels.

A method of controlling a display device is a method for controlling a display device including a light modulation sheet switchable between a transparent state and an opaque state. When an operation to turn on the display device is obtained, a PWM waveform for generating an alternating voltage based on a direct voltage is output, the alternating voltage having a duty cycle of 50% at a phase of 0 degrees or 180 degrees, the alternating voltage is generated from the direct voltage, based on the PWM waveform output, and the alternating voltage generated is output to the light modulation sheet.

The display apparatus includes a substrate including an auxiliary circuit area and an auxiliary display area, an auxiliary pixel circuit on the auxiliary circuit area, an auxiliary display element on the auxiliary display area, and a connection line extending from the auxiliary circuit area to the auxiliary display area and configured to connect the auxiliary pixel circuit to the auxiliary display element. The connection line includes a first sub-line and a second sub-line which are on different layers, and the first sub-line is electrically connected to the second sub-line through a contact portion.

A display device includes a display module having a folding area and a non-folding area adjacent to the folding area. A glass substrate is disposed on the display module and comprises a first layer and a second layer disposed on the first layer. The second layer has a compressive strength that is higher than a compressive strength of the first layer. The first layer and the second layer of the glass substrate each include a folding portion overlapping the folding area and having a first thickness and a non-folding portion overlapping the non-folding area and having a second thickness greater than the first thickness. The second layer of the non-folding portion has a thickness that is greater than a thickness of the second layer of the folding portion.

Disclosed is a display device including a first output part, a second output part, a power supply circuit connected to input terminals of the first output part and the second output part, a first sensing part connected to an output terminal of the first output part, a second sensing part connected to an output terminal of the second output part, a first voltage output terminal connected to the first sensing part and the second sensing part, a plurality of pixels connected to the first voltage output terminal and configured to display an image, and a defect determination part controlling shutdown of the power supply circuit by comparing a first sensing value and a second sensing value, which are received from the first sensing part and the second sensing part, with a first reference value and a second reference value having a level lower than the first reference value.

A power voltage generator includes a first sensor, a second sensor, a comparator and a shutdown controller. The first sensor is configured to sense a first power voltage output node that outputs a first power voltage. The second sensor is configured to sense a second power voltage output node that outputs a second power voltage. The comparator is configured to compare a first sensing signal of the first sensor with a second sensing signal of the second sensor. The shutdown controller is configured to shut down the power voltage generator based on a comparison signal from the comparator.

A driving method of a display device including a power source which supplies a power voltage to a power base line, and pixels connected to power branch lines commonly connected to the power base line, includes calculating a first scale factor based on input grayscales received during a first frame period; calculating first output grayscales by applying the first scale factor to first input grayscales received during a second frame period, where the second frame period is a frame period immediately next to the first frame period; displaying an image by at least a part of the pixels based on the first output grayscales; and providing a first current limiting signal to the power source and calculating a second scale factor smaller than the first scale factor when a current of the power base line exceeds a reference value.

A display device and a driving circuit are discussed. According to an embodiment of the present disclosure, it is possible to stably maintain the output signal of the driving circuit when the lock signal indicating the synchronization state of the clock signal is changed due to an operation error such as overcurrent in a display device using a point-to-point interface. In addition, according to an embodiment of the present disclosure, it is possible to prevent damage to the display panel due to an overload generated in the output signal of the driving circuit by an operation error. In addition, according to an embodiment of the present disclosure, it is possible to prevent overload of the driving circuit and damage to the display panel by controlling the operation of the driving circuit through a differential input voltage between the timing controller and the driving circuit.

A display device includes a substrate including a display configured to display an image and a non-display area disposed on at least one side of the display area. A plurality of pixels is disposed in the display area. An organic insulating layer is disposed on the substrate. A pixel defining layer is disposed on the organic insulating layer. A sealing layer at least partially covers the display area and the non-display area and includes an inorganic material. The organic insulating layer and the pixel defining layer have a valley disposed therein. The valley is formed by removing portions of the organic insulating layer and the pixel defining layer along a circumference of the display area.

A control method of a display includes a statistics circuit, a backlight determining circuit and a backlight control circuit. The display includes a backlight module having a maximum power. The statistics module receives frame, and generates luminance statistical information of a plurality of blocks included in the frame. The backlight determining circuit determines a backlight intensity corresponding to each of the blocks according to the luminance statistical information of the blocks and the maximum power. At least one of the backlight intensities corresponding to the blocks is greater than a normal luminance, which is a backlight intensity corresponding to one of the blocks when the maximum power is evenly distributed on light emitting elements of the display. The backlight control circuit controls the luminance of the backlight module according to the backlight intensities.