Display device and method for driving same
Provided is a display device for carrying out seamless display so that a sense of strangeness is not given to a viewer or the sense of strangeness is reduced. In at least one embodiment, a display device includes a display panel on which a plurality of display elements are disposed in a matrix, the display panel having a frame area which is located at an end of the display panel and in which no display element is provided; a light guide element provided on the display panel, the light guide element changing a light path of part of light emitted from the plurality of display elements so that the part of light is guided to the frame area; a photosensor provided on the display panel, the photosensor detecting environment illuminance; an image signal correcting section which (i) corrects, in accordance with the environment illuminance detected by the photosensor, an image signal to be supplied to a display element included in an area where the light guide element is provided so that a reduction in luminance or coloring of display light of the image caused by the light guide element is reduced, and (ii) outputs a corrected image signal; and a driving section which drives the display element in accordance with the corrected image signal.
1. A display device that displays an image based on image signals, comprising:
at least one display panel on which a plurality of display elements for displaying the image are disposed in a matrix, the at least one display panel having a frame area which is located at an end of the at least one display panel and in which no display element is provided;
a light guide element provided on the at least one display panel, the light guide element changing a light path of part of light emitted from the plurality of display elements so that the part of light is guided to the frame area;
at least one photosensor provided on the at least one display panel, the at least one photosensor detecting environment illuminance;
an image signal correcting section which (i) corrects, in accordance with the environment illuminance detected by the at least one photosensor, an image signal to be supplied to a display element included in an area where the light guide element is provided out of the image signals, and (ii) outputs a result obtained by the correction as a corrected image signal; and
a driving section which drives the display element in accordance with the corrected image signal.
2. The display device according to claim 1 , wherein:
the at least one display panel includes plural kinds of display elements emitting different colors, and the image signal correcting section corrects an image signal to be supplied to at least one kind of display element.
3. The display device according to claim 1 , wherein:
the correction carried out by the image signal correcting section includes correction of reducing coloring of display light of the image caused by external light entering the light guide element.
4. The display device according to claim 1 , wherein:
the correction carried out by the image signal correcting section includes correcting at least one of (i) an image signal to be supplied to a display element in the area where the light guide element is provided and (ii) an image signal to be supplied to a display element in the area where the light guide element is not provided so that at least one of attenuation and coloring of light that occur in a case where light from the display element passes through the light guide element is compensated.
5. The display device according to claim 1 , wherein:
the image signal correcting section includes:
an illuminance judging section which receives an illuminance signal supplied from the at least one photosensor, judges an environment illuminance based on the illuminance signal, and outputs an illuminance judgment signal in accordance with a result of the judgment of the environment illuminance; and
a data correcting section which corrects the image signal in accordance with the illuminance judgment signal.
6. The display device according to claim 5 , wherein:
the image signal correcting section further includes a corrected position storage section which stores positional information specifying a position of a display element subjected to image signal correction out of the plurality of display elements disposed in a matrix.
7. The display device according to claim 5 , wherein:
the illuminance judging section (i) judges the environment illuminance in a case where positional information of a display element to which an image signal is to be supplied matches positional information specifying a position of the display element included in the area where the light guide element is provided, and (ii) outputs the illuminance judgment signal in accordance with a result of the judgment of the environment illuminance.
8. The display device according to claim 1 , wherein
the at least one photosensor is provided in proximity with the light guide element.
9. The display device according to claim 1 , wherein
the at least one photosensor is capable of detecting at least a wavelength range absorbed by the light guide element.
10. The display device according to claim 1 , wherein:
the at least one photosensor is a color sensor which has different sensitivities for respective colors and which is capable of detecting light amounts of the colors at a same time, and
the at least one photosensor includes a photosensor which receives light that has passed through the light guide element and a photosensor which receives light that does not pass through the light guide element.
11. The display device according to claim 1 , wherein:
the at least one display panel comprises a plurality of display panels including a first display panel and a second display panel which is provided in proximity with or in contact with the first display panel, and
a light guide element provided on the first display panel is in contact with a light guide element provided on the second display panel with no gap therebetween.
12. The display device according to claim 1 , wherein
the at least one display panel includes liquid crystal elements as the plurality of display elements.
13. The display device according to claim 1 , wherein the image signal correcting section corrects the image signal in accordance with the environment illuminance so that at least one of a reduction in luminance and a color shift that occur due to the light guide element is reduced.
14. A method for driving a display device including a display panel on which a plurality of display elements for displaying an image based on image signals are disposed in a matrix, the display panel having a frame area which is located at an end of the display panel and in which no display element is provided, the method comprising the steps of:
detecting an environment illuminance of the display device;
correcting, in accordance with the environment illuminance thus detected, an image signal to be supplied to a display element included in an area where a light guide element is provided out of the image signals, the light guide element being provided on the display panel, and the light guide element changing a light path of light emitted from the plurality of display elements so that the light is guided to the frame area; and
driving the display element in accordance with a corrected image signal obtained by the correction.
15. The method according to claim 14 , wherein in the step of correcting in accordance with the environment illuminance thus detected, the image signal is corrected in accordance with the environment illuminance so that at least one of a reduction in luminance and a color shift that occur due to the light guide element is reduced.