IMAGE DISPLAY DEVICE AND IMAGE DISPLAY METHOD

• Main Author: SHIMIZU KAZUE
• Format: Patent
• Language: English; Japanese
• Published: 23.06.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To provide an image display device that can expand a display viewing angle area while preventing color unevenness with a simple configuration to display a larger amount of information.SOLUTION: An image display device 10 comprises: an image forming unit 13 that has a plurality of pixels and emits rays of image light from the pixels; an optical system 12 that converts the rays of image light having respective image heights emitted from the image forming unit into rays of parallel light having an angle of view; a light guide plate 11 that makes the rays of image light converted by the optical system incident thereon, causes the light to propagate therein, and emits the light to the outside; a first diffraction grating 14 that is disposed on the light guide plate, and diffracts and reflects the rays of image light made incident on the light guide plate to cause the light to propagate inside the light guide plate; and a second diffraction grating 15 that is disposed on the light guide plate, and diffracts and reflects the rays of image light propagating inside the light guide plate to emit the light to the outside from the light guide plate. The image forming unit 13 divides the rays of image light into a plurality of rays of color light.SELECTED DRAWING: Figure 1 【課題】簡素な構成で色ムラを抑制しつつ、表示画角領域を拡大してより多くの情報を表示することが可能な画像表示装置を提供すること。【解決手段】画像表示装置１０は、複数の画素を有し、画素から画像光を出射する画像形成部１３と、画像形成部から出射された各像高の画像光を画角の平行光へ変換する光学系１２と、光学系で変換された画像光が入射され、内部を伝搬して外部へ出射される導光板１１と、導光板に配設され、導光板に入射された画像光を回折反射して導光板の内部を伝搬させる第１回折格子１４と、導光板に配設され、導光板の内部を伝搬した画像光を回折反射して導光板から外部へ出射する第２回折格子１５と、を備え、画像形成部１３は、画像光を複数の色光に分割する。【選択図】図１