DISPLAY DEVICE AND AUTOMOBILE
To switch a view angle between a wide view angle and a narrow view angle and suppress the view angle from being excessively narrowed when the view angle is switched to the narrow view angle.SOLUTION: A display device 1 comprises a display panel 10, an ultraviolet lightguide plate 130, a film 131 and...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To switch a view angle between a wide view angle and a narrow view angle and suppress the view angle from being excessively narrowed when the view angle is switched to the narrow view angle.SOLUTION: A display device 1 comprises a display panel 10, an ultraviolet lightguide plate 130, a film 131 and an ultraviolet light source 132. The display panel includes pixels 120, 121. The ultraviolet lightguide plate is stacked on top of the display panel. A first principal surface 130a of the ultraviolet lightguide plate exists on the side where the pixels are arranged. A second principal surface 130b of the ultraviolet lightguide plate exists on the side opposite the side where the pixels are arranged. The film is arranged on the first principal surface of the ultraviolet lightguide plate. An opening 141 of the film is arranged on an optical path passing through the pixels and heading toward a first direction. A non-open portion 140 of the film is arranged on an optical path passing through the pixels and heading toward a second direction that is different from the first direction. The film is composed of a photochromic photosensitive substance. The ultraviolet light source irradiates an end face of the ultraviolent lightguide plate with an ultraviolent ray.SELECTED DRAWING: Figure 1
【課題】視野角を広い視野角と狭い視野角との間で切り替え、視野角を狭い視野角に切り替えた場合に視野角が過剰に狭くなることを抑制する。【解決手段】表示装置1は、表示パネル10、紫外線導光板130、膜131及び紫外線光源132を備える。表示パネルは、画素120,121を備える。紫外線導光板は、表示パネルに重ね合わされる。紫外線導光板の第1の主面130aは、画素が配置される側にある。紫外線導光板の第2の主面130bは、画素が配置される側と反対の側にある。膜は、紫外線導光板の第1の主面上に配置される。膜の開口141は、画素を通り第1の方向に向かう光路上に配置される。膜の非開口部分140は、画素を通り第1の方向と異なる第2の方向に向かう光路上に配置される。膜は、フォトクロミック感光物質からなる。紫外線光源は、紫外線導光板の端面に紫外線を照射する。【選択図】図1 |
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