Patent ID: 8320041

Claim:
A three-dimensional image display device, comprising: a display panel where a plurality of pixel sections, each of which includes pixels displaying an image for a right eye and pixels displaying an image for a left eye, are arrayed in matrix form, the pixels sections being periodically arranged in a horizontal direction; and an optical unit that emits light emitted from the pixels displaying said image for the right eye and light emitted from the pixels displaying said image for the left eye in directions different from each other, wherein a three-dimensional visible range is defined as positions where a midpoint between a viewer's right eye and left eye is positioned such that the light emitted from the pixels displaying said image for the right eye is made incident to said right eye and the light emitted from the pixels displaying said image for the left eye is made incident to said left eye, and wherein the pixel sections are arrayed such that a number of pixel sections per inch in the horizontal direction or the definition X of the pixel sections, is configured such that a definition of the image in the horizontal direction (X) as projected in the three-dimensional visible range when D(mm), which is defined as the distance between said display panel and a point which is most distant from said display panel within said three-dimensional visible range, is set to satisfy the equation below, so that viewing angles of images of pixel sections incident to the right and left eyes are smaller than or equal to 1 minute: X>25.4/D*tan(1′).