Seiko Epson Corporation

Shinsuke Fujikawa

Hiroaki Jo

Takehiko Kubota

Tokuro Ozawa

Toru Nimura

Hiroyuki Oikawa

Shin Fujita

Tsukasa Eguchi

Nariya Takahashi

A liquid crystal device includes a common electrode as a first electrode, a pixel electrode as a second electrode, a liquid crystal layer to which a drive voltage is applied for one refresh period as a first refresh period, and a measurement circuit that applies an inspection voltage to the liquid crystal layer between the common electrode and the pixel electrode, sets a period that is longer than one refresh period after the application of the inspection voltage is stopped, and measures a voltage between the common electrode and the pixel electrode.

Liquid crystal device, electronic apparatus, and physical property measurement method for liquid crystal layer

A liquid crystal apparatus includes a first electrode disposed between a first substrate and a liquid crystal layer, a second electrode disposed between a second substrate and the liquid crystal layer, an electrode lead line electrically coupled to the first electrode, a plurality of drive signal lines including a first drive signal line that intersects with the electrode lead line in plan view, a first conductive layer disposed between the electrode lead line and the first drive signal line and electrically coupled to the second electrode, and a measurement circuit, and the measurement circuit supplies a potential to each of the first electrode and the second electrode in a first period and a second period, and stops the supply of the potential to the first electrode and supplies the same potential as that in the second period to the second electrode in a third period.

Liquid crystal apparatus and electronic device

An electro-optical device includes a temperature detecting element and an electrostatic protection circuit configured to protect the temperature detecting element from a surge current. The electrostatic protection circuit includes a transistor electrically connected to the temperature detecting element in parallel, a first capacitance element electrically connected to the transistor, and a resistance element electrically connected to the first capacitance element in parallel. The electrostatic capacity of the first capacitance element is greater than a gate capacity between a gate electrode and a semiconductor layer that constitutes the transistor. In addition, a dielectric layer of the first capacitance element is thicker than a gate insulating film of the transistor.

Electro-optical device and electronic device

A liquid crystal apparatus includes a first electrode, a liquid crystal layer, a second electrode facing the first electrode via the liquid crystal layer, a first node electrically coupled to the first electrode, a first switch having one end coupled to the first node, a second node electrically coupled to the other end of the first switch, and a measurement circuit that applies a potential to each of the second node and the second electrode, and the measurement circuit brings the first switch into a conduction state and applies a potential to the second node and the second electrode so that a potential difference between the first electrode and the second electrode becomes a predetermined potential difference in a third period, and brings the first switch into a non-conduction state and applies a feedback potential that is a potential based on a potential of the first node to the second node in a fourth period after the third period.

A liquid crystal device includes: a first electrode; a second electrode; a liquid crystal layer; and a measurement circuit configured to supply a potential to the first electrode and the second electrode and measure a first electrode potential, wherein the measurement circuit supplies a potential to the first electrode and the second electrode so that a potential difference between the first electrode and the second electrode becomes a first potential difference during a first period, supplies a potential to the first electrode and the second electrode so that the potential difference becomes a second potential difference having a polarity different from that of the first potential difference during a second period after the first period, and stops supplying the potential to the first electrode and supplies the same potential as during the second period to the second electrode during a third period after the second period.

Liquid crystal device, electronic device, and diagnostic system for measuring state of liquid crystal panel

A liquid crystal apparatus includes a first electrode, a liquid crystal layer, a second electrode, and a measurement circuit, and the measurement circuit supplies a first potential to the first electrode and supplies a second potential higher than the first potential to the second electrode in a first period, supplies the first potential to the first electrode, and supplies a third potential higher than the first potential and lower than the second potential to the second electrode in a second period, supplies a fourth potential higher than the third potential and lower than the second potential to the first electrode and supplies a third potential to the second electrode in a third period, and stops the supply of the potential to the first electrode and supplies the third potential to the second electrode in a fourth period.

In an electro-optical device, a first substrate is provided with a temperature detection element and an electro-static protection circuit that protects the temperature detection element from a surge current. A first resistor element is electrically coupled to the temperature detection element in series. The electro-static protection circuit includes a transistor electrically coupled to the first resistor element and the temperature detection element in parallel. A first capacitance element is provided on a wiring substrate electrically coupled to the first substrate, and is provided between a first coupling wiring line electrically coupled to one side of the temperature detection element and a second coupling wiring line electrically coupled to the other side thereof.

Electro-optical device and electronic apparatus

An electro-optical device includes: a liquid crystal panel; a particle aligned type anisotropic conductive film having a plurality of electrically conductive particles that are arranged in a state of being aligned along a first direction and a second direction intersecting with the first direction; and a printed circuit board coupled to a connection terminal portion of the liquid crystal panel via the particle aligned type anisotropic conductive film, wherein the connection terminal portion includes a plurality of connection terminals, a plurality of recessed portions that are arranged in a state of being aligned along a third direction and a fourth direction intersecting with the third direction are formed on a surface of the connection terminal, and at least one of the first direction and the second direction along which the electrically conductive particles are arranged is different in arrangement direction from both the third direction and the fourth direction.

Electro-optical device comprising a plurality of terminals having a plurality of recessed portions including first and second recessed portions and electronic apparatus

In a liquid crystal device serving as an electro-optical device, a liquid crystal layer as an electro-optical element is disposed between a base materialas a first substrate and a base materialas a second substrate which are disposed to face each other via a photo-curable type seal material, the substrateand the substrateare transmissive and include a plurality of light-shielding patterns disposed at intervals in a seal region of the substratewhere the seal material is disposed, and on the substrate, a semiconductor layer of a transistor included in a driving circuit for driving the electro-optical element is disposed to overlap, in plan view, with at least one of the plurality of light-shielding patterns.

An electro-optical device includes a liquid crystal panel, and a printed circuit board that is electrically coupled to a terminal portion of the liquid crystal panel by electrically conductive particles arranged in a state of being aligned as viewed in plan view, wherein the terminal portion has a plurality of panel terminals arranged along a first direction extending along one side of the liquid crystal panel, the panel terminal has a long side extending along a second direction obliquely intersecting with the first direction and a short side extending along a direction intersecting with the second direction, and an arrangement direction of the electrically conductive particles is arranged along a third direction intersecting with the second direction.

A first substrate of an electro-optical device is provided with a temperature detection circuit including a temperature detection element, and a first wiring line and a second wiring line of the temperature detection element are electrically connected to a first terminal and a second terminal, respectively. Between the first terminal and the second terminal, a third terminal that is not electrically connected to the temperature detection element is provided. Thus, through detection of a current at the time of applying a ground potential from a first probe and a second probe of an inspection device to the first terminal and the second terminal and applying a predetermined voltage from a third probe to the third terminal, insulation between the first terminal and the second terminal can be inspected.

In an electro-optical device, a temperature detection element is provided on a first substrate having a pixel region, on which a plurality of pixel electrodes are provided, in a position overlapping a light shielding portion that is formed on a second substrate so as to surround the pixel region. Further, the first substrate is provided with an electrostatic protection circuit that includes a semiconductor element and is electrically coupled to the temperature detection element. The semiconductor element is disposed in a position which is farther distanced from the center of the pixel region than the temperature detection element is, and at which a temperature is lower than a temperature at a position in which the temperature detection element is provided.

Electro-optical panel, electro-optical device, and electronic apparatus

Electro-optical device comprising an anisotropic conductive film having a plurality of electrically conductive particles and a terminal having a plurality of recessed portions and electronic apparatus

A substrate for an electro-optical device includes a first mounting terminal and a second mounting terminal connected to a sensor element. The substrate for an electro-optical device includes a first resistive element including a first end electrically connected to the first mounting terminal and a second end electrically connected to the second mounting terminal, a second resistive element including a first end electrically connected to the first resistive element and a second end electrically connected to the second mounting terminal, and a third mounting terminal electrically connected to the second end of the first resistive element and the first end of the second resistive element.

Substrate for electro-optical device, electro-optical device, and electronic apparatus, method for manufacturing electro-optical device, and inspection circuit

Provided is an electro-optical device including an electro-optical panel that includes a display region, a holder that holds the electro-optical panel, a first temperature detecting element that is disposed on the electro-optical panel and detects the temperature of the electro-optical panel, and a second temperature detecting element that is disposed on the holder and detects the temperature of the holder. When four quadrants are defined by an X axis line passing through a center of the display region and a Y axis line passing through the center of the display region and orthogonal to the X axis line, the first temperature detecting element and the second temperature detecting element are disposed in the same quadrant.

Growing community of inventors

Chino, Japan

Shinsuke Fujikawa