US 10,771,772 B2Granted

Image display device

AssigneeHitachi-LG Data Storage, Inc.

InventorsRyuji Ukai, Yoshiho Seo

Life of this patent

Estimating the term…

Loading patent…

Abstract

According to the present invention, in an image display device that displays two images in parallel, a peak current for light source driving and continuation of a peak current are suppressed without reducing luminance of a display image. An image display device includes a light source unit, two panel units, and a timing control unit. A period of one frame of an image displayed by each panel unit has a standby period in which the panel unit is not illuminated by the light source unit for image generation and a lighting period in which the panel unit is illuminated by the light source unit. The timing control unit controls an operation timing such that the periods of one frame of the images displayed by the respective panel units overlap, and frame start times of the periods are shifted from each other by a predetermined delay time.

Claims13

Dependent claims

An image display device that displays a first image and a second image in parallel, comprising:

a light source unit;
a first panel unit which is illuminated by light emitted from the light source unit, and generates and displays the first image;
a second panel unit which is illuminated by light emitted from the light source unit and generates and displays the second image;
a timing control unit that controls operation timings of the light source unit, the first panel unit, and the second panel unit,
wherein a period of one frame of the first image displayed by the first panel unit includes a standby period in which the first panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the first panel unit is illuminated by the light from the light source unit,
wherein a period of one frame of the second image displayed by the second panel unit includes a standby period in which the second panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the second panel unit is illuminated by the light from the light source unit, and
wherein the timing control unit performs control such that the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit overlap and frame start times of the respective periods are shifted from each other by a predetermined delay time Td,
wherein the timing control unit sets the delay time Td so that a sum Tsum of overlap lighting periods in which a lighting period in which the light source unit illuminates the first panel unit and a lighting period in which the light source unit illuminates the second panel unit overlaps in the period of one frame of the first image displayed by the first panel unit is a minimum.

5 more elements

An image display device that displays a first image and a second image in parallel, comprising:

a light source unit;
a first panel unit which is illuminated by light emitted from the light source unit, and generates and displays the first image;
a second panel unit which is illuminated by light emitted from the light source unit and generates and displays the second image;
and
a timing control unit that controls operation timings of the light source unit, the first panel unit, and the second panel unit,
wherein a period of one frame of the first image displayed by the first panel unit includes a standby period in which the first panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the first panel unit is illuminated by the light from the light source unit,
wherein a period of one frame of the second image displayed by the second panel unit includes a standby period in which the second panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the second panel unit is illuminated by the light from the light source unit,
wherein the timing control unit performs control such that the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit overlap and frame start times of the respective periods are shifted from each other by a predetermined delay time Td,
wherein the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit are divided into a plurality of sub frame periods in order to display images of a plurality of colors sequentially,
wherein each of the sub frame periods has a standby period of the first panel unit or the second panel unit and a lighting period of the light source unit,
wherein a time sequence of the period of one frame of the first image displayed by the first panel unit is identical to a time sequence of the period of one frame of the second image displayed by the second panel unit, and
wherein lengths Twait of the standby periods of the first panel unit or the second panel unit in the respective sub frames are identical,
wherein, when the length of the period of one frame of the first image displayed by the first panel unit is indicated by Tframe, a length of a longest lighting period among the light source periods of the light source unit in the respective sub frames is indicated by Tlight, and a length Twait of standby period≥Tlight, and
wherein the timing control unit sets the delay time Td to satisfy
Tlight≤Td≤Twait, or
Tframe−Twait≤Td≤Tframe−Tlight.

13 more elements

An image display device that displays a first image and a second image in parallel, comprising:

a light source unit;
a first panel unit which is illuminated by light emitted from the light source unit, and generates and displays the first image;
a second panel unit which is illuminated by light emitted from the light source unit and generates and displays the second image;
and
a timing control unit that controls operation timings of the light source unit, the first panel unit, and the second panel unit,
wherein a period of one frame of the first image displayed by the first panel unit includes a standby period in which the first panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the first panel unit is illuminated by the light from the light source unit,
wherein a period of one frame of the second image displayed by the second panel unit includes a standby period in which the second panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the second panel unit is illuminated by the light from the light source unit,
wherein the timing control unit performs control such that the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit overlap and frame start times of the respective periods are shifted from each other by a predetermined delay time Td,
wherein the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit are divided into a plurality of sub frame periods in order to display images of a plurality of colors sequentially,
wherein each of the sub frame periods has a standby period of the first panel unit or the second panel unit and a lighting period of the light source unit,
wherein a time sequence of the period of one frame of the first image displayed by the first panel unit is identical to a time sequence of the period of one frame of the second image displayed by the second panel unit,
wherein lengths Twait of the standby periods of the first panel unit or the second panel unit in the respective sub frames are identical,
wherein, when the length of the period of one frame of the first image displayed by the first panel unit is indicated by Tframe, a length of a longest lighting period among the light source periods of the light source unit in the respective sub frames is indicated by Tlight, a length of a shortest lighting period is indicated by Tlight0, and a length Twait of standby period≥Tlight0 and length Twait of standby period≤Tlight, and
wherein the timing control unit sets the delay time Td to satisfy
Td=Twait, or
Td=Tframe−Twait.

13 more elements

An image display device that displays a first image and a second image in parallel, comprising:

a light source unit;
a first panel unit which is illuminated by light emitted from the light source unit, and generates and displays the first image;
a second panel unit which is illuminated by light emitted from the light source unit and generates and displays the second image;
and
a timing control unit that controls operation timings of the light source unit, the first panel unit, and the second panel unit;
wherein a period of one frame of the first image displayed by the first panel unit includes a standby period in which the first panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the first panel unit is illuminated by the light from the light source unit,
wherein a period of one frame of the second image displayed by the second panel unit includes a standby period in which the second panel unit is not illuminated by the light from the light source unit for image generation preparation and a lighting period in which the second panel unit is illuminated by the light from the light source unit,
wherein the timing control unit performs control such that the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit overlap and frame start times of the respective periods are shifted from each other by a predetermined delay time Td,
wherein the period of one frame of the first image displayed by the first panel unit and the period of one frame of the second image displayed by the second panel unit are divided into a plurality of sub frame periods in order to display images of a plurality of colors sequentially,
wherein each of the sub frame periods has a standby period of the first panel unit or the second panel unit and a lighting period of the light source unit,
wherein a time sequence of the period of one frame of the first image displayed by the first panel unit is identical to a time sequence of the period of one frame of the second image displayed by the second panel unit,
wherein lengths Twait of the standby periods of the first panel unit or the second panel unit in the respective sub frames are identical,
wherein, when a length of a shortest lighting period among the lighting periods of the light source units in the respective sub frames is indicated by Tlight0, and a length Twait of the standby period≤Tlight0, and
wherein the timing control unit sets the delay time Td to satisfy
Twait≤Td≤Tlight0, or
Tframe−Tlight0≤Td≤Tframe−Twait.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/059,138Filed 9 Aug 2018
Priority: JP 2017-16536630 Aug 2017
Published: US 2019/0068959 A128 Feb 2019
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

G09G 3/3413
Control of illumination source: details of control of colour illumination sources
H04N 13/332
Image reproducers: displays for viewing with the aid of special glasses or head-mounted displays [HMD]
G02B 6/122
Of the integrated circuit kind: basic optical elements, e.g. light-guiding paths
G02B 27/017
Head-up displays: head mounted

Family

US 2019/0068959 A1Pre-grant publication · published 28 Feb 2019
US 10,771,772 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key