Display device, viewing angle control method, computer program storage device with viewing angle control program, and mobile terminal

A display device comprising:

• a display panel unit having predetermined viewing angle characteristics;
• a data and table holding unit having a non-transitory storage device configured to hold data in a conversion table used for predetermined gamma curve conversion corresponding to the predetermined viewing angle characteristics of the display panel unit and to hold predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit;
• a gamma curve conversion unit configured to perform the predetermined gamma curve conversion on original image data to converted image data to be displayed on the display panel unit using the data in the conversion table;
• and
• an image combining unit configured to combine the converted image with the predetermined oblique-view image data to generate composite image data,
• wherein the composite image data generated by the image combining unit is displayed on the display panel unit.

A method for controlling a viewing angle of a display device including a display panel unit having predetermined viewing angle characteristics, comprising:

• converting, by an image data conversion unit, original image data to converted image data to be displayed on the display panel unit so that a luminance difference in a low gray level region does not substantially change after conversion and so that a luminance difference in a high gray level region after conversion becomes smaller than a luminance difference obtained before conversion;
• combining, by an image combining unit, the converted image data with predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit to generate composite image data;
• and
• displaying the composite image data generated by the image combining unit on the display panel unit.

A method for controlling a viewing angle of a display device including a display panel unit having predetermined viewing angle characteristics, comprising:

• performing, by a gamma curve conversion unit, predetermined gamma curve conversion on original image data to converted image data to be displayed on the display panel unit using data in a conversion table used for predetermined gamma curve conversion corresponding to the predetermined viewing angle characteristics of the display panel unit;
• combining, by an image combining unit, the converted image data with predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit to generate composite image data;
• and
• displaying the composite image data on the display panel unit.

A non-transitory computer storage device having instructions that when executed by a computer processor perform a method of controlling a viewing angle of a display device including a display panel unit having predetermined viewing angle characteristics, the method including:

• converting original image data to converted image data to be displayed on the display panel unit so that a luminance difference in a low gray level region does not substantially change after conversion and so that a luminance difference in a high gray level region after conversion becomes smaller than a luminance difference obtained before conversion;
• combining the converted image data with predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit to generate composite image data;
• and
• displaying the composite image data generated by the image combining unit on the display panel unit.

A non-transitory computer storage device having instructions that when executed by a computer processor perform a method of controlling a viewing angle of a display device including a display panel unit having predetermined viewing angle characteristics, the method including:

• performing with the computer processor gamma curve conversion on original image data to provide converted image data to be displayed on the display panel unit using data in a conversion table used for predetermined gamma curve conversion corresponding to the predetermined viewing angle characteristics of the display panel unit;
• combining the converted image data with predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit to generate composite image data;
• and
• displaying the composite image data on the display panel unit.

A mobile terminal comprising:

• a display panel unit having predetermined viewing angle characteristics;
• an image data conversion unit configured to convert original image data to converted image data to be displayed on the display panel unit so that
• a luminance difference in a low gray level region is not substantially changed after conversion, and
• a luminance difference in a high gray level region after conversion becomes smaller than a luminance difference obtained before conversion;
• a data holding unit configured to hold predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit;
• and
• an image combining unit configured to combine the converted image data with the predetermined oblique-view image data to generate composite image data,
• wherein the composite image data generated by the image combining unit is displayed on the display panel unit.

A mobile terminal comprising:

• a display panel unit having predetermined viewing angle characteristics;
• a data and table holding unit having a non-transitory storage device configured to hold data in a conversion table used for predetermined gamma curve conversion corresponding to the predetermined viewing angle characteristics of the display panel unit and to hold predetermined oblique-view image data corresponding to the predetermined viewing angle characteristics of the display panel unit;
• a gamma curve conversion unit configured to perform the predetermined gamma curve conversion on original image data to converted image data to be displayed on the display panel unit using the data in the conversion table;
• and
• an image combining unit configured to combine the converted image data with the predetermined oblique-view image data to generate composite image data,
• wherein the composite image data generated by the image combining unit is displayed on the display panel unit.