Samsung Electronics Co., Ltd.

Hewlett-packard Development Company, L.p.

Seung-ju Kim

Saburo Yokota

Beom-jun Kim

Hwan-koo Lee

Kyung-yol Yon

Ji-Young Lee

Moto Makino

Kwang-il Park

In Huh

Tae-ho Lee

Youn-sik Park

Hyo-jin Choi

Chang-wook Jeong

Joon-wan Chai

Ji-uk Kim

Jeong-hoon Ko

Young-min Oh

Jun-haeng Lee

Hyun-sun Park

So-hyeon An

Hun Jung

Il-sun Hwang

Young-soo Ha

Sung-hoon Kang

Yong-jun Kwon

A method of reinforcement learning of a neural network device for generating a verification vector for verifying a circuit design comprising a circuit block includes inputting a test vector to the circuit block, generating one or more rewards based on a coverage corresponding to the test vector, the coverage being determined based on a state transition of the circuit block based on the test vector, and applying the one or more rewards to a reinforcement learning.

Device for generating verification vector for circuit design verification, circuit design system, and reinforcement learning method of the device and the circuit design system

A device for verifying a circuit design including a first circuit block and a second circuit block includes a verification vector generator and a design verifier. The verification vector generator determines a first verification vector by performing reinforcement learning through neural network computation based on a coverage corresponding to a first test vector, the coverage being determined based on a state transition of the first circuit block generated by inputting the first test vector to the first circuit block. The design verifier performs design verification for the first circuit block by using the first verification vector.

A photosensitive body is provided. The photosensitive body includes a photosensitive layer, and a protective layer formed on the photosensitive layer, and the protective layer includes a urethane oligomer acrylate and a modified perfluoropolyether acrylate.

Photosensitive body including protective layer formed on photosensitive layer

Provided is a photoreceptor having an appropriate surface frictional force that enables a cleaning angle, at which the slipping between the surface of the photoreceptor surface and the blade is prevented and the overturning and vibrating of the blade are prevented, to be easily obtained.

Electro-photographic photoreceptor and image forming apparatus including the same

An electrophotographic photoreceptor including a photosensitive layer which includes a titanyl phthalocyanine crystal having a major absorption peak at a wavelength of 780 nm&#xb1;10 nm and a minor absorption peak having an intensity of &#xbe; or less of the major absorption peak at 690 nm&#xb1;10 nm in the visible-infrared absorption spectrum and a distyryl compound having a predetermined structure. An electrophotographic image forming apparatus employing the electrophotographic photoreceptor is also provided. The electrophotographic photoreceptor and the electrophotographic image forming apparatus have good photosensitivity and charging properties and good stability over repeated charging obtained by using an optimum combination of a new crystal type of a highly photosensitive titanyl phthalocyanine and a distyryl compound which is a charge transporting material that is compatible with the titanyl phthalocyanine.

Electrophotographic photoreceptor and electrophotographic imaging apparatus employing the photoreceptor

An electrophotographic photoreceptor and an electrophotographic imaging apparatus include an asymmetric naphthalenetetracarboxylic acid diimide derivative. The asymmetric naphthalenetetracarboxylic acid diimide derivative has increased solubility in organic solvents and improved compatibility with binder resins, thus providing excellent electron transporting ability. The electrophotographic photoreceptor containing the asymmetric naphthalenetetracarboxylic acid diimide compound according to the present invention can maintain a constant surface potential after being repeatedly used for an extended time. The electrophotographic photoreceptor according to the present invention can provide a high image quality for an extended time.

Electrophotographic photoreceptor containing asymmetric naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the same

A two-layered electrophotographic photoreceptor is formed. The two-layered electrophotographic photoreceptor includes an electrically conductive substrate and a charge generating layer and a charge transporting layer form on the electrically conductive substrate, wherein the charge generating layer is a naphthalenetetracarboxylic acid diimide derivative represented by:  The two-layered electrophotographic photoreceptor has high photosensitivity and low residual potential.

Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives as electron transport materials in charge generating layer and the electrophotographic imaging apparatus using the photoreceptor

An electrophotographic photoreceptor is provided containing a specific asymmetric naphthalenetetracarboxylic acid diimide derivative having a nitro group. An electrophotographic imaging apparatus, an electrophotographic cartridge, and an electrophotographic drum employing the electrophotographic photoreceptor are also provided. The naphthalenetetracarboxylic acid diimide derivative has high solubility in an organic solvent, compatibility with a binder resin, and electron transporting ability. The electrophotographic photoreceptor manufactured using the naphthalenetetracarboxylic acid diimide derivatives has an excellent electrostatic property.

Electrophotographic photoreceptor containing asymmetrical naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the photoreceptor

An electrophotographic photoreceptor including: an electrically conductive substrate; a charge generating layer disposed on the electrically conductive substrate and includes a charge generating material dispersed or dissolved in a binder resin and an asymmetric naphthalenetetracarboxylic acid diimide derivative having a nitro group dispersed or dissolved in the binder resin. The photoreceptor also has a charge transporting layer that is disposed on the charge generating layer and includes a charge transporting material that is dispersed or dissolved in the binder resin. An electrophotographic image forming apparatus including the electrophotographic photoreceptor. The two-layered type electrophotographic photoreceptor has good interlayer adhesive force and good electrical properties such as good photosensitivity and low residual potential after exposure.

Electrophotographic photoreceptor containing asymmetrical naphthalenetetracarboxylic acid diimide derivative as electron transporting material in a charge generating layer and electrophotographic image forming apparatus employing the photoreceptor

An electrophotographic photoreceptor containing a naphthalenetetracarboxylic acid diimide derivative of Formula (1), which has a branched alkyl group substituted with an aryl group at the &#x3b1;-position with regard to nitrogen atoms of imide groups:  The naphthalenetetracarboxylic acid diimide derivative has high solubility in organic solvents and compatibility with binder resins, thus providing better electron transporting ability. The invention is also directed to an electrophotographic imaging apparatus using the photoreceptor.

Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the same

New compounds having an electron transferring capability, and an electrophotographic photoreceptor including the new compounds are disclosed. The compound according to the present invention is represented by the following Formula 2: where R, Rand Rare independently selected from the group consisting of a substituted or unsubstituted Cto Calkyl group, a substituted or unsubstituted Cto Calkoxy group, a substituted or unsubstituted Cto Caryl group, a substituted or unsubstituted Cto Caralkyl group, and a halogen; m is 0 or an integer of 1 to 4; and n is 0 or an integer of 1 to 5. These compounds can be used an electron transferring material of an undercoating layer or a photoconductive layer of an electrophotographic photoreceptor. The electron transferring material of the invention produces an electrophotographic photoreceptor having improved electrical characteristics.

Electrophotographic photoreceptor using the electron transferring compound

A phenylazomethylene-cyclohexadienone derivative and an electrophotographic photoreceptor include a compound that is represented by the following formula: wherein Rand Rare independently selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 20 carbon atom(s), a substituted or unsubstituted alkoxy group having 1 to 20 carbon atom(s), a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, and a halogen; A is selected from the group consisting of nitro group, cyano group and sulfone group; l is a natural number of 0 to 4; m is a natural number of 0 to 4; and n is a natural number of 1 to 5, and the electrophotographic photoreceptor according to the present invention comprises the phenylazomethylene-cyclohexadienone derivative. An electrophotographic photoreceptor having an improved electrical characteristic and a desirable image quality is provided.

Phenylazomethylene-cyclohexadienone derivatives comprising electron withdrawing group and electrophotographic photoreceptor comprising the derivatives

Naphthalenetetracarboxylic acid diimide derivatives and an electrophotographic photoconductive material containing the naphthalenetetracarboxylic acid diimide derivatives. The naphthalenetetracarboxylic acid diimide derivatives have a structure represented by the following formula: in which, Rand Rare each independently selected from the group consisting of a substituted or non-substituted C-Calkyl group; a substituted or non-substituted C-Calkoxy group; a substituted or non-substituted C-Caryl group; and a substituted or non-substituted C-Caralkyl group; and halogen. The electrophotographic photoconductive material includes the naphthalenetetracarboxylic acid diimide derivatives as an electron transferring material.

Naphthalenetetracarboxylic acid diimide derivatives and electrophotographic photoconductive material using the derivatives

An electrophotographic photoreceptor includes a conductive substrate, a photoconductive layer formed on the conductive substrate containing a charge generating material and a charge transferring material, and a protective layer formed on the photoconductive layer for protecting the photoconductive layer. The protective layer contains an alcohol-soluble polyamide resin and an alcohol-soluble chelate compound. According to the present invention, the electrophotographic photoreceptor has the protective layer with chelate compound has improved adhesive properties to the photoconductive layer and improved the electrostatic characteristic and productivity.

Electrophotographic photoreceptor containing a chelate compound

Naphthalenetetracarboxylic acid diimide derivatives include a structure represented by the following formula: in which, R, R, and Rare each independently any one selected from the group consisting of hydrogen; halogen; substituted or unsubstituted alkyl of Cto C; substituted or unsubstituted alkoxy of Cto C; substituted or unsubstituted aryl of Cto C; and substituted or unsubstituted aralkyl of Cto C. An electrophotographic photoconductive material includes the naphthalenetetracarboxylic acid diimide derivatives as an electron transferring material.

Growing community of inventors

Suwon-si, South Korea

Seung-ju Kim