Display devices and methods are disclosed. In one example, a display device includes display elements arranged in a two-dimensional matrix, data lines for respective display element columns, and a source driver that supplies a video signal voltage to the data lines. In the data lines, display element row includes display elements belonging to first and second groups different from each other. The source driver generates a ramp signal and includes a switch circuit that causes a data line to hold a video signal voltage. When output of the ramp signal and a data line are switched from a connected state to a disconnected state in order to cause the data line corresponding to a certain display element to hold a video signal voltage, a data line corresponding to a display element belonging to a different group and the ramp signal are switched from the disconnected state to the connected state.

According to the present invention, provided are an optical laminate which has excellent adhesiveness between two optically anisotropic layers, and in which an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, which is as an optically anisotropic layer, has excellent liquid crystal alignment properties, a polarizing plate, and an image display device. An optical laminate of the present invention has: a first optically anisotropic layer formed of a first liquid crystal compound; a second optically anisotropic layer formed of a second liquid crystal compound; and a mixed layer which is disposed between the first optically anisotropic layer and the second optically anisotropic layer and contains a component derived from the first liquid crystal compound and a component derived from the second liquid crystal compound, the first optically anisotropic layer is a C plate, the second optically anisotropic layer is an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, the mixed layer further contains a photo-alignment compound, and in an analysis of components of the optical laminate in a depth direction by time-of-flight secondary ion mass spectrometry with ion beam irradiation from a surface of the optical laminate on a first optically anisotropic layer side toward a second optically anisotropic layer side, predetermined requirements are satisfied.

Disclosed are an electrical connection method for an electronic element, and a backlight module, a display panel, and a display apparatus which include an electronic element to which the electrical connection method is applied. The electrical connection method comprises: providing a driving back plane, wherein the driving back plane comprises multiple contact electrodes; forming an anti-oxidation protection film on the contact electrodes; coating a position of the anti-oxidation protection film corresponding to each contact electrode with a binding material; and transferring multiple electronic elements to the positions of the corresponding contact electrodes, binding each electronic element to the corresponding contact electrode, and removing the anti-oxidation protection film at the position of each contact electrode before completing the binding of each electronic element to the corresponding contact electrode.

Provided is a compound of Chemical Formula 1:

##STR00001##

wherein: Y.sub.1 to Y.sub.9 are each independently N, C—H, C-D, or C-L′-R, provided that at least one of Y.sub.1 to Y.sub.9 is N; L′ is a single bond or a substituted or unsubstituted C.sub.6-60 arylene; R is a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing any one or more of N, O and S; L is a single bond, a substituted or unsubstituted C.sub.6-60 arylene, or a substituted or unsubstituted C.sub.2-60 heteroarylene containing any one or more of N, O and S; L.sub.1 and L.sub.2 are each independently a single bond or a substituted or unsubstituted C.sub.6-60 arylene; and Ar.sub.1 and Ar.sub.2 are each independently a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing any one or more of N, O and S;
and an organic light emitting device including the same.

The present specification provides a compound of Chemical Formula 1, and an organic light emitting device including the same. The compound provides a low driving voltage, high light emission efficiency and a long lifetime of the organic light emitting device. ##STR00001##

A display device includes a plate-like substrate having a first surface and a second surface, pixel units on the first surface, and a power supply voltage feeder on the second surface. The power supply voltage feeder outputs first and second power supply voltages applicable to the pixel units. The second power supply voltage is lower in potential than the first power supply voltage. The display device includes a first wiring conductor electrically connecting the power supply voltage feeder and the pixel units and a second wiring conductor electrically connecting the power supply voltage feeder and the pixel units. At least one of the first or second wiring conductor includes a planar conductive portion covering the first surface. The planar conductive portion includes connectors connected to the power supply voltage feeder on at least two sides of the substrate.

A heater for an evaporator includes a heating wire and a support, and the heating wire includes a tunnel part that surrounds an outer surface of a container in which an organic material is accommodated and is coiled in a cylindrical shape, a flange part that is connected to an upper end of the tunnel part and has a spiral structure in which a radius increases in a plane direction, a first straight part extending downward from a lower end of the tunnel part, and a second straight part extending downward from a distal end of the flange part, and the support includes a ring part that supports a lower surface of the flange part, and a plurality of bars extending downward form the ring part.

Provided is an organic light emitting device comprising an anode, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode, wherein the light emitting layer comprises a compound of Chemical Formula 1 and a compound of Chemical Formula 2:

##STR00001##

wherein: A is a benzene ring; Ar.sub.1 and Ar.sub.2 are independently a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing one or more of N, O and S; X.sub.1 to X.sub.3 are independently N or CH, provided that at least one of them is N; L is a substituted or unsubstituted C.sub.2-60 heteroarylene or a C.sub.6-60 arylene substituted with a C.sub.2-20 heteroaryl, the heteroarylene or heteroaryl containing one or more of N, O and S; and Ar.sub.3 and Ar.sub.4 are independently a substituted or unsubstituted C.sub.6-60 aryl or C.sub.2-60 heteroaryl containing one or more of N, O and S.

A display apparatus capable of improving image quality is provided. In the display apparatus, an adder circuit is provided inside and outside a display region, and the adder circuit has a function of adding a plurality of pieces of data supplied from a source driver. Some components of the adder circuit are separately arranged in a pixel region. Thus, limitation on the size of a component included in the adder circuit can be eased, and data addition can be performed efficiently. In addition, by providing the other components included in the adder circuit outside the display region, the number of wirings in the display region can be reduced and the aperture ratio of the pixel can be increased.

Provided is an organic light emitting device that includes an anode, a cathode, a light emitting layer containing a compound of Chemical Formula 1:

##STR00001##

and a hole transport region that includes a compound of Chemical Formula 2:

##STR00002##

the organic light emitting device having improved driving voltage, efficiency and lifetime.