Head mounted display device

PURPOSE: A head mounted display device is provided to eccentrically dispose a display element by using a rotation-asymmetric optical system for using a reflective LCD as the display element, thereby obtaining HD images with minimum distortion. CONSTITUTION: A head mounted display device includes a display element using self-luminous element or a backlight, and a prism(20) in a triangular structure on the whole. The display element is eccentrically disposed with respect to an optical axis(b) of an observer to keep a minimum distance of 7.5mm from the prism so that a reflective LCD displaying images by external light is utilized as the display element. An angle(γ) between the optical axis of the display element and an optical axis(b) of the observer is an acute angle, so a polarized beam splitter keeps an angle of 45° sufficiently. The prism has an incident surface(21) for transmitting the light of the display element, and first and second reflecting surfaces(22,23). The first surface forms an acute angle(α) with the incident surface and an acute angle(β) with the second reflecting surface. The light transmitted via the incident surface advances to the first reflecting surface, the light reflected from the first reflecting surface advances to the second reflecting surface, and the light reflected from the second reflecting surface is radiated to the observer. 본 발명은 두부 탑재형 디스플레이장치에 관한 것으로, 디스플레이소자(10)와, 상기 디스플레이소자(10)의 빛을 통과시키는 입사면(21)과, 상기 입사면(21)과의 사이각(α)이 예각이 되게 구비되고 상기 입사면(21)을 통과한 빛을 반사하는 제1반사면(22) 및, 상기 제1반사면(22)과의 사이각(β)이 예각이 되게 구비되고 상기 제1반사면(22)에서 반사된 빛을 반사하여 관찰자의 눈측으로 조사하는 제2반사면(23)을 포함하여, 회전비대칭 광학계의 사용에 의해 디스플레이소자를 편심배치할 수 있게 되어 반사형 LCD를 디스플레이소자로 사용할 수 있게 됨으로써 고해상도의 선명한 상과 최소의 왜곡을 제공할 수 있도록 된 것이다.