Image display apparatus of head mounted type

An image display apparatus of head mounted display type comprising:

• a right eye image display element for displaying a right image to be exclusively observed by a right eye of a user and having (a) an image display plane which includes an image display area and an image non-display area and (b) a frame member surrounding said image display plane;
• a left eye image display element for displaying a left image to be exclusively observed by a left eye of the user and having (a) an image display plane which includes an image display area and an image non-display area and (b) a frame member surrounding said image display plane of said left eye image display element;
• a right eye optical system for introducing the right eye image displayed on the image display area of the right eye image display element into the right eye of the user;
• a left eye optical system for introducing the left eye image displayed on the image display area of the left eye image display element into the left eye of the user;
• and
• an electronic control means for controlling said right and left eye image display elements such that the right and left eye images are displayed on the image display areas of the right and left eye image display elements, respectively, wherein said right and left eye image display elements and right and left eye optical systems are arranged on a main body which is adapted to be put on the head of the user, and said control means comprises a detecting means provided on said main body for detecting a deviation of the main body from a standard position to derive a detection signal, a calculating means for calculating amounts of shift and/or rotation of the right and left eye images displayed on said right and left eye image display elements, respectively, in accordance with said detection signal, and an image converting means for converting original image signals in accordance with said amounts of shift and/or rotation, and wherein said detecting means is formed to detect a horizontal rotation of the head and/or body of the user to derive a horizontal rotation angle signal, a vertical rotation of the head and/or body of the user to derive a vertical rotation angle signal and a swinging rotation of the head and/or body of the user to derive a swinging angle signal, and said calculating means calculates an amount of a horizontal shift in accordance with said horizontal rotation angle signal such that the right and left eye images displayed on the right and left eye image display elements are shifted horizontally in a direction which is opposite to a direction of said horizontal rotation of the head and/or body of the user, an amount of a vertical shift in accordance with said vertical rotation angle signal such that the right and left eye images displayed on the right and left eye image display elements are shifted vertically in a direction which is opposite to a direction of said vertical rotation of the head and/or body of the user, and a rotation angle in accordance with said swinging angle signal such that the right and left eye images displayed on the right and left eye image display elements are rotated in a direction which is opposite to a direction of said swinging rotation of the head and/or body of the user, whereby said amounts of horizontal shift and vertical shift and rotation angle are supplied to said image converting means and said original signal is converted by the image converting means such that said right and left eye images are seen by the user to be stationary on a virtual image plane even if the main body is deviated from the standard position.