Multi-display device and image display device

Patent metadata

Field	Value
Publication number	US-9240145-B2
Application number	US-201214113629-A
Country	US
Kind code	B2
Filing date	Apr 20, 2012
Priority date	Apr 27, 2011
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

A multi-display device includes an image-display-light emitting backlight which includes a light emitting element arranged in each of a plurality of areas to emit light to form planar light; and a light emission controller configured or programmed to generate emission luminance data, for each of the areas, to drive the light emitting element. The light emission controller includes a luminance correcting controller configured or programmed to correct the emission luminance data on the basis of installation directions of image display devices and connection information that is information on connection positions thereof.

First claim

The invention claimed is:

1. A multi-display device comprising:
a plurality of image display devices configured to display a continuous image, each of the image display devices comprising:
an image-display-light emitting backlight configured to cause a light emitting element arranged in each of a plurality of areas to emit light to form planar light;
a light emission controller configured or programmed to generate emission luminance data, for each area, to drive the light emitting element; and
a memory of the light emission controller which is configured to store a multi-luminance correction filter group including a correction data table for correction of the emission luminance data of each of the plurality of image display devices, wherein
the light emission controller is configured or programmed to correct the emission luminance data with reference to the correction data table selected from the multi-luminance correction filter group on the basis of connection information on the image display device.

2. The multi-display device according to claim 1 ,
wherein the connection information at least includes information about any one of the number of connections, an installation direction, and a connection position.

3. The multi-display device according to claim 1 ,
wherein the light emission controller corrects the emission luminance data so that the planar light emitted from the image-display-light emitting backlight included in each of the image display devices is controlled to have a decreased luminance in a peripheral portion of an image display section of the multi-display device.

4. The multi-display device according to claim 1 ,
wherein the light emission luminance correcting controller corrects the emission luminance data so that the planar light has a uniform luminance distribution and thereafter performs luminance correction on the basis of the connection information about the image display device.

5. The multi-display device according to claim 1 ,
wherein the image-display-light emitting backlight is configured to generate planar light with a non-uniform luminance distribution.

6. The multi-display device according to claim 1 ,
wherein the memory includes luminance inclination information along at least two directions of the multi-display device, and
the light emission controller is configured or programmed to generate the multi-luminance correction filter group corresponding to each of the image display devices on the basis of the luminance inclination information.

7. The multi-display device according to claim 1 ,
wherein each of the image display devices includes connection state detector that includes a sensor configured to detect an installation direction and/or a connection position detector configured to detect a connection position of the image display device in the multi-display device.

8. The multi-display device according to claim 1 ,
wherein the multi-display device includes an external controller that is connected to all of the plurality of image display devices and configured or programmed to transmit the connection information to each of the image display devices.

9. The multi-display device according to claim 1 ,
wherein the multi-display device includes an external controller that is connected to all of the plurality of image display devices and configured or programmed to transmit, to each of the image display devices, information to select the corresponding correction data table from the multi-luminance correction filter group on the basis of the connection information.

10. The multi-display device according to claim 1 ,
wherein the multi-display device includes a detecting sensor configured to detect the position of an observer,
the multi-luminance correction filter group includes a correction data table to correct the emission luminance data of each of the image display devices in accordance with the position of the observer, and
the corresponding correction data table is selected on the basis of the connection information and the position of the observer.

11. The multi-display device according to claim 1 ,
wherein the multi-luminance correction filter group includes the correction data table that matches with image data, and
wherein the light emission controller is configured or programmed to receive the emission luminance data and information indicating a characteristic of an image to be displayed and refers to the correction data table on the basis of the connection information and the information indicating the characteristic of the image.

12. An image display device that constitutes the multi-display device according to claim 1 .

13. A multi-display device comprising:
a plurality of image display devices configured to display a continuous image, each of the image display devices comprising:
an image-display-light emitting backlight configured to cause a light emitting element arranged in each of a plurality of areas to emit light to form planar light;
a light emission controller configured or programmed to generate emission luminance data, for each area, to drive the light emitting element; and
a memory which is configured to store a multi-luminance correction filter group including a correction data table for correction of the emission luminance data of each of the plurality of image display devices, wherein
the light emission controller is configured or programmed to correct the emission luminance data with reference to the correction data table selected from the multi-luminance correction filter group on the basis of connection information on the image display device, and
the multi-display device further includes an external controller that is connected to all of the plurality of image display devices, that includes therein the memory including the correction data table for correction of the emission luminance data, and that is configured or programmed to transmit, to each of the image display devices, the correction data table selected for each of the image display devices from the multi-luminance correction filter group on the basis of the connection information.

14. The multi-display device according to claim 13 ,
wherein the memory stores luminance inclination information along at least two directions of the multi-display device, and
the external controller is configured or programmed to generate the multi-luminance correction filter group corresponding to each of the image display devices on the basis of the luminance inclination information.

Assignees

• Ichioka Hideki
• Murai Takayuki
• Kondoh Naoko
• Sharp Kk

Inventors

• Ichioka Hideki
• Murai Takayuki
• Kondoh Naoko

Classifications

• G09G2320/0238

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• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• G09G2300/026

  Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions · CPC title

• H04N21/42202

  environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes · CPC title

• G09G2320/08

  Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal · CPC title