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Electro-optical device and electronic apparatus

a technology of optical devices and electronic devices, applied in static indicating devices, non-linear optics, instruments, etc., can solve problems such as inability to resolve and achieve excellent appearance and reduce display irregularities in series

Inactive Publication Date: 2017-02-02
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a configuration for an electro-optical device that reduces display irregularities, such as streaks, caused by parasite capacitance. The configuration involves setting the overlapping amounts of the gate electrode and data lines of transistors in a way that reduces the potential difference between image signals on the pixel electrodes. This configuration can be applied to devices that use phase expansion driving or in devices with multiple pixels. The technical effect of the configuration is a more uniform display quality, reduced display irregularities, and an improved appearance of the display.

Problems solved by technology

However, in the display device in JP-A-2006-322959, it is possible to make uniform the rising timing of the video signal and the gate signal of the transistor as the switching means when seen from the signal line side, but there is a problem in that it is not possible to resolve display irregularities in series as streaks caused by the parasitic capacitance of the signal line.

Method used

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  • Electro-optical device and electronic apparatus
  • Electro-optical device and electronic apparatus
  • Electro-optical device and electronic apparatus

Examples

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first embodiment

[0034]The present embodiment is described with an active matrix type liquid crystal device which is provided with a thin film transistor (TFT) as a pixel switching element as an example of an electro-optical device. It is possible for this liquid crystal device to be appropriately used as, for example, an optical modulation element (liquid crystal light valve) of a projector type display device (liquid crystal projector) which will be described later.

[0035]Liquid Crystal Device

[0036]First, a schematic structure of a liquid crystal device as the electro-optical device of the present embodiment will be described with reference to FIGS. 1A and 1B. FIG. 1A is a schematic planar view illustrating a configuration of a liquid crystal device and FIG. 1B is a schematic cross-sectional view along a line IB-IB of the liquid crystal device illustrated in FIG. 1A.

[0037]As illustrated in FIGS. 1A and 1B, a liquid crystal device 100 as the electro-optical device of the present embodiment has an el...

second embodiment

[0079]Next, a liquid crystal device of a second embodiment will be described with reference to FIG. 5. FIG. 5 is a circuit diagram illustrating a main circuit configuration of the liquid crystal device according to the second embodiment. The liquid crystal device according to the second embodiment differs in terms of the method of driving the plurality of data lines 6a with regard to the liquid crystal device 100 of the first embodiment. Accordingly, the same reference numerals are attached to the same configurations as the liquid crystal device 100 and the detailed description is omitted.

[0080]As shown in FIG. 5, a liquid crystal device 200 of the present embodiment has a plurality of the pixels P which are partitioned by a plurality of the scanning lines 3a and a plurality of the data lines 6a and are arranged in a matrix formation in the pixel region E on the element substrate 10 side. In addition, a semiconductor integrated circuit (IC) 201 as a driving circuit which drives the ...

third embodiment

[0091]Next, a liquid crystal device of the third embodiment will be described with reference to FIG. 6. FIG. 6 is a circuit diagram illustrating a main circuit configuration of the liquid crystal device according to the third embodiment. The liquid crystal device of the third embodiment is an example where the hybrid driving method of the second embodiment is applied to 4k2k, so-called super Hi-Vision, which has four times the number of pixel of Hi-Vision (number of pixels; 1920×1080). Here, in FIG. 6, the circuit configuration of the main portions is shown and the circuit configuration across all of the pixels P is not shown. The same configurations as the liquid crystal device 200 of the second embodiment are given the same reference numeral and a detailed description is omitted.

[0092]As shown in FIG. 6, a liquid crystal device 300 has a plurality (4096×2160) of the pixels P which are partitioned by a plurality of scanning lines and a plurality of data lines and are arranged in a ...

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Abstract

An electro-optical device including an image signal line that is supplied with an image signal, a data line that is electrically connected to a pixel electrode through a switching transistor, and a transistor that is electrically connected between the image signal line and the data line and supplies the image signal to the data line. A gate electrode of the transistor overlaps with a part of the data line, and an insulating layer is disposed between the gate electrode of the transistor and the data line.

Description

[0001]The present application is a continuation application of U.S. patent application Ser. No. 13 / 610,075 filed on Sep. 11, 2012, which claims priority from Japanese Patent Application No. 2011-218975 filed Oct. 3, 2011, each of which are expressly incorporated by reference herein.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to an electro-optical device and an electronic apparatus which is provided with the electro-optical device.[0004]2. Related Art[0005]As the electro-optical device, a display device is known (JP-A-2006-322959) where, when the number of signal lines which are arranged for each pixel arranged in a matrix formation on a substrate is set as n and N lines (where N is an integer of two or more) is set as a unit with regard to each of the n signal lines, n / N video lines which are arranged so that an output terminal is positioned between every two adjacent signal lines, switching means for connecting between the output terminal of the video line...

Claims

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Application Information

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IPC IPC(8): G02F1/1345G02F1/1333G02F1/1362G09G3/36G02F1/1368
CPCG02F1/1345G09G3/36G02F1/1368G02F2201/123G02F1/133345G09G2300/0426G02F1/136286G09G3/3688
Inventor NAKAGAWA, MASASHI
Owner SEIKO EPSON CORP
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