Samsung Electronics Co., Ltd.

Samsung Display Co., Ltd.

Seog-Soon Baek

Yong-soo Oh

Min-Soo Kim

Seung-Joo Shin

Keon Kuk

Su-ho Shin

Jong-woo Shin

Chang-seung Lee

Ji-Hyuk Lim

Yong-Soo Lee

Hyung-taek Lim

Seong-jin Kim

Kye-Si Kwon

Gee-Young Sung

Dong-kee Sohn

Ki-deok Bae

Sang-Il Kim

Mi-jeong Song

Young-jae Kim

Mun-cheol Choi

You-seop Lee

Se-young Oh

Byeung-leul Lee

Sung-Joong Joo

Seung-joo Shin

Seong-Jin Kim

Yong-Soo Oh

Dong-Kee Sohn

A method of manufacturing an organic light emitting structure is provided as follows. A first electrode is formed on a lower substrate. A pixel defining layer is formed adjacent to the first electrode on the lower substrate. A preliminary charge transport layer is formed on the first electrode and the pixel defining layer. An organic light emitting layer is formed on the preliminary charge transport layer. The preliminary charge transport layer is selectively etched to form a charge transport layer. A second electrode is formed on the organic light emitting layer.

Method of manufacturing an organic light emitting structure and method of manufacturing an organic light emitting display device

A method of manufacturing an organic light emitting display apparatus includes preparing a substrate having a pixel electrode and a pixel defining layer exposing the pixel electrode, forming a hole injection layer (HIL) on the substrate to cover the pixel electrode and the pixel defining layer, forming a primer layer on the HIL, patterning the primer layer to leave a region corresponding to at least a portion of the pixel electrode, removing a portion of the HIL to expose an outer portion of the substrate, and forming an opposing electrode to cover the HIL and the outer portion of the substrate.

Method of manufacturing organic light emitting display apparatus

Provided are a print head error checking apparatus and method in which the residual oscillation of a piezoelectric element corresponding to each nozzle of a print head is sensed, the sensed residual oscillation of each piezoelectric element and a predetermined residual oscillation of the piezoelectric element are compared to each other, and whether a print head normally operates is checked in consideration of the results of the comparisons.

Print head error checking apparatus and method

An apparatus and method for fabricating a color filter by printing pixels on a substrate using an ink jet head, optically analyzing pixel quality and controlling printing in accordance with the pixel quality. Optically analyzing may include analyzing a number of ink droplets or a transmittance of a printed pixel.

Apparatus and method for fabricating a color filter

A nozzle plate and printhead allowing for control of a deflection direction of ejected droplets using electro-wetting, and methods of operating and manufacturing the same. The nozzle plate has at least one nozzle for ejecting fluid and includes electrode segments disposed along a circumference of the nozzle, an insulating layer disposed on a surface of each electrode segment so as to contact fluid in the nozzle, the insulating layer divided into at least two insulating layer segments corresponding to the electrode segments, and a wire pattern electrically coupled to the electrode segments.

Nozzle plate, printhead having the same and methods of operating and manufacturing the same

A nozzle plate, inkjet printhead with the same and method of manufacturing the same. The nozzle plate includes at least one nozzle and has at least one heater segment disposed adjacent to the nozzle. The heater segment is configured to heat a first fraction of the circumference to a greater degree than a second fraction of the circumference. Heater segments are disposed at intervals around a circumference of the nozzle and are independently operable.

Nozzle plate, inkjet printhead with the same and method of manufacturing the same

In an ink-jet printhead and a method for manufacturing the same, the ink-jet printhead includes a substrate, an ink chamber to be filled with ink formed on a front surface of the substrate, a manifold for supplying ink to the ink chamber formed on a rear surface of the substrate, and an ink passage in flow communication with the ink chamber and the manifold formed parallel to the front surface of the substrate; a nozzle plate including a plurality of passivation layers formed of an insulating material on the front surface of the substrate, a heat dissipating layer formed of a metallic material, and a nozzle in flow communication with the ink chamber; and a heater and a conductor, the heater being positioned on the ink chamber and heating ink in the ink chamber, and the conductor for applying a current to the heater.

Method for manufacturing ink-jet printhead

A monolithic ink-jet printhead, and a method of manufacturing the same, includes a substrate having an ink chamber, an ink channel, and a manifold, a nozzle plate formed on the substrate, a nozzle, a heater, and a conductor. The ink chamber includes sidewalls formed to a predetermined depth from the front surface of the substrate for defining side surfaces of the ink chamber and a bottom wall formed parallel to the front surface of the substrate at the predetermined depth from the front surface of the substrate for defining a bottom surface of the ink chamber. The nozzle plate includes a plurality of passivation layers, a heat dissipating layer being stacked on the passivation layers, and the nozzle for ejecting ink out of the printhead. The heater is positioned above the ink chamber and heats ink in the ink chamber and the conductor delivers a current to the heater.

Method of manufacturing a monolithic ink-jet printhead

An apparatus and method for driving an ink-jet printhead in which current is applied to a heater to heat ink to be supplied in an ink chamber to generate a bubble to eject ink from the ink chamber, the apparatus including a circuit that alternately applies current to the heater to alternate a direction of current flowing through the heater.

Apparatus and method for driving an ink-jet printhead

A thermally-driven ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected, a manifold for supplying ink, and an ink channel for providing flow communication therebetween. First and second sidewalls are formed to a predetermined depth from an upper surface of the substrate and define the ink chamber to have a substantially rectangular shape. A nozzle plate including a plurality of material layers is formed on the substrate. A nozzle passes through the nozzle plate and is in flow communication with the ink chamber. A heater is disposed between the nozzle and one of the first sidewalls above the ink chamber. A conductor is electrically connected to the heater. The conductor and the heater are disposed within the nozzle plate. A shifting feature moves cavitation points beyond an outer edge of the heater.

Thermally-driven ink-jet printhead capable of preventing cavitation damage to a heater

Monolithic ink-jet printhead

An ink-jet printhead includes an ink chamber to be filled with ink to be ejected, a manifold, which supplies ink to the ink chamber, an ink channel, which provides communication between the ink chamber and the manifold, a nozzle through which ink is ejected from the ink chamber, first and second heaters, which heat ink in the ink chamber to generate bubbles, and a conductor, which is electrically connected to the first and second heaters and applies a current to the first and second heaters, wherein the first and second heaters are positioned symmetrically around a center of the nozzle, and one of the first and second heaters is positioned adjacent to the ink channel.

Growing community of inventors

Suwon-si, South Korea

Seog-Soon Baek