Title:
LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2020046674
Kind Code:
A
Abstract:
To provide a liquid crystal display device capable of preventing degradation in image quality and a method for driving the device, and to provide a liquid crystal display device performing image display that can be recognized in accordance with the environment of the device regardless of the conditions of the environment such as a bright environment or a dim environment, or capable of performing image display both in a reflective mode using external light as an illumination light source and in a transmissive mode using a light source.SOLUTION: The liquid crystal display device includes: a liquid crystal element having a pixel part 412 having a first region and a second region, and a plurality of light sources 407, in which transmittance in the first region and the second region is controlled according to a voltage of an input image signal; and a transistor for controlling retention of a voltage. Upon displaying a full-color image, light beams in different colors are sequentially supplied, following a first rotation, to the first area from the light source 407, while light beams in different colors are sequentially supplied, following a second rotation that is different from the first rotation, to the second area. Displaying a monochromatic image is performed by reflecting external light in a reflection area possessed by a pixel electrode.SELECTED DRAWING: Figure 1
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Inventors:
YAMAZAKI SHUNPEI
KOYAMA JUN
MIYAKE HIROYUKI
TOYOTAKA KOHEI
KOYAMA JUN
MIYAKE HIROYUKI
TOYOTAKA KOHEI
Application Number:
JP2019212231A
Publication Date:
March 26, 2020
Filing Date:
November 25, 2019
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB CO LTD
International Classes:
G09G3/36; G02F1/133; G02F1/1368; G09G3/20; G09G3/34
Domestic Patent References:
| JP2010056546A | 2010-03-11 | |||
| JP2016167587A | 2016-09-15 | |||
| JP2017194688A | 2017-10-26 | |||
| JP2006350310A | 2006-12-28 | |||
| JP2003315766A | 2003-11-06 | |||
| JP2001184015A | 2001-07-06 | |||
| JP2009167087A | 2009-07-30 | |||
| JP2007220820A | 2007-08-30 | |||
| JP2012032801A | 2012-02-16 |
Foreign References:
| WO2010014598A2 | 2010-02-04 |
Other References:
SEIKO AMANO他: "Low Power LC Display Using In-Ga-Zn-Oxide TFTs Based on Variable Frame Frequency", ＳＩＤ １０ ＤＩＧＥＳＴ, vol. Volume 41, Issue 1, JPN6015008696, May 2010 (2010-05-01), US, pages 626 - 629, ISSN: 0004593202