Display devices and methods for making and driving the display devices are provided. In one example, a device for driving a display panel including an array of pixels includes a timing controller. Each of the pixels includes a first light emitting element and a second light emitting element. The timing controller is configured to provide a first set of timing control signals for coordinating timing of gate scanning and timing of writing display data into the array of pixels. The timing controller is further configured to provide a second set of timing control signals for controlling timing of emitting light by the first and second light emitting elements of the array of pixels such that the first light emitting elements emit light in a first light emitting period and the second light emitting elements emit light in a second light emitting period, alternatively.

Provided is a compensation method of a cathode voltage drop of an OLED display device and a pixel driving circuit. The first pixel driving circuits having function of detecting the cathode voltage are arranged in a portion of sub pixels of the OLED display device and uses the first pixel driving circuits to detect the cathode voltages of these sub pixels. The cathode voltages inputted to all the sub pixels of the OLED display device are obtained by interpolation according to the detected cathode voltages of these detecting sub pixels. Then, the cathode voltage compensation look up table is obtained according to the cathode voltages of all the sub pixels of the OLED display device. Finally, the data signal voltage is compensated with the cathode voltage compensation look up table. The data signal voltage after compensation is used to drive the OLED display device to perform image display.

An organic light emitting display device according to an embodiment includes a lower substrate; a bank layer disposed on the lower substrate; a connection assistance unit disposed on the bank layer; a cathode disposed on the lower substrate so as to cover the bank layer; an auxiliary electrode disposed on the bank layer and electrically connected with the cathode; and an upper substrate provided to face the lower substrate.

A touch display device and a method of driving the same are provided. The touch display device includes a metal layer and a plurality of organic light-emitting unit groups. Each of the plurality of organic light-emitting unit groups includes a plurality of organic light-emitting units and the organic light-emitting units of each of the plurality of organic light-emitting unit groups shares one of the plurality of cathodes, the plurality of cathodes are insulated from each other, and each of the plurality of cathodes forms a capacitive pressure sensor with the metal layer.

Provided are a display device and a method for manufacturing the same. According to exemplary embodiments, a display device includes a substrate in which a display area and a non-display area disposed outside the display area are defined, an interlayer insulating film disposed on the substrate, a passivation film disposed on the interlayer insulating film, an anode disposed on the passivation film, an intermediate layer disposed on the anode, a cathode disposed on the intermediate layer, a capping layer disposed on the cathode, and an encapsulation film disposed on the capping layer.

An OLED display substrate and a display device are provided in the field of display devices. The OLED display substrate includes a plurality of pixel units arranged in an array. Each of the pixel units includes a plurality of sub-pixel units, and each of the sub-pixel units includes two light-emitting units arranged in a laminated mode. At most one of the two light-emitting units in the same sub-pixel unit emits light at one moment. Only one of the two light-emitting units in the same sub-pixel unit is made to emit light at one moment such that the two light-emitting units may be controlled to operate alternately to reduce the time during which each light-emitting unit is continuously on, such that each light-emitting unit has enough time to dissipate heat.

Devices, structures, materials and methods for carbon enabled vertical light emitting transistors (VLETs) and light emitting displays (LEDs) are provided. In particular, architectures for vertical polymer light emitting transistors (VPLETs) for active matrix organic light emitting displays (AMOLEDs) and AMOLEDs incorporating such VPLETs are described. Carbon electrodes (such as from graphene) alone or in combination with conjugated light emitting polymers (LEPs) and dielectric materials are utilized in forming organic light emitting transistors (OLETs). Combinations of thin films of ionic gels, LEDs, carbon electrodes and relevant substrates and gates are utilized to construct LETs, including heterojunction VOLETs.

A display device includes a pixel portion in which a pixel electrode layer is arranged in a matrix, and an inverted staggered thin film transistor having a combination of at least two kinds of oxide semiconductor layers with different amounts of oxygen is provided corresponding to the pixel electrode layer. In the periphery of the pixel portion in this display device, a pad portion is provided to be electrically connected to a common electrode layer formed on a counter substrate through a conductive layer made of the same material as the pixel electrode layer. One objection of our invention to prevent a defect due to separation of a thin film in various kinds of display devices is realized, by providing a structure suitable for a pad portion provided in a display panel.

A pixel structure of an organic light emitting diode (OLED) display panel and a manufacturing method thereof are disclosed. The pixel structure comprises a pixel region, anode conductive layers, pixel units, and a cathode conductive layer. The pixel region comprises sub-pixel regions arranged in sequence, at least two adjacent sub-pixel regions defined as a sub-pixel region group are disposed integrally. The anode conductive layers are disposed in the sub-pixel regions respectively, and separated from each other. The cathode conductive layer is electrically connected with the anode conductive layers to control the pixel units. Each of the pixel units comprises sub-pixels and is disposed in the pixel region. Each of the sub-pixels is disposed in one of the sub-pixel regions. The sub-pixels are formed integrally and have a same color in the sub-pixel region group. The pixel unit comprises a hole injection layer, a luminous layer and an electron injection layer.

A display substrate, a display panel and a display device are provided. The display substrate includes: a base substrate including a plurality of display units, wherein each of the plurality of display units is provided with an anode, an organic light-emitting layer and a cathode, wherein anodes of different display units are separated from each other; a plurality of cathode lines connected to the driving ICs, wherein the cathode lines are arranged between the cathode and the base substrate; an insulating layer arranged between the cathode lines and the cathodes, wherein a plurality of cathode windows corresponding to the cathode lines formed in the insulating layer, wherein at least part of the plurality of cathode windows respectively corresponds to at least two display regions, a cathode at each of the display region is connected to the respective cathode line via the cathode window corresponding to the display region.