Double block refraction image display device with visual focal length compressing set

Abstract

A birefraction image display apparatus with focus compression group comprises two display units; two reflection units located by one side of the display unit; two focus compression units separately located between the first and second display units; two refracting sets located by one side of said reflection unit but the refracting set isn't located in the line formed by the reflection unit and the display unit; and two virtual image forming sets separatedly located by two other sides of the two refractor sets to polarizedly refract the light sent from refractor and its image is converted into virtual image through virtual image forming set. The refractor set is located between reflection unit and virtual image forming set; the image displayed in the display unit goes to the reflection unit through the focus compression unit and is polarizedly refracts to reflecting set and is formed into a handstand real image to the original through refracting set and then is converted into a virtual image with handstand direction with original image through virtual image forming set.

Description

technical field [0001] The invention relates to an image display device, especially an image display device suitable for glasses or helmets. Background technique [0002] In recent years, various audio-visual equipment and display devices have been improved with each passing day. In addition to enhanced functions, thin, light, small, and portable displays are also the mainstream of display development. One of the emerging display devices is virtual reality (virtual reality) technology. The integration of various technologies, such as display technology, computer technology, sensory technology, and sound effect technology, reduces the original large-sized audio-visual equipment to a square inch and becomes a portable glasses-type projection display device. Although the general flat panel display is light in weight, its size is limited by material weight and cost, and it cannot achieve the effect of enlarging the image size and being easy to carry at the same time. Therefore,...

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Problems solved by technology

Moreover, in the process of quickly adjusting the focus, a large number of blood vessels around the eyeball will cause pressure on the eyeball. The high intraocular pressure caused by long-term and frequent adjustment of the focus not only causes discomfort to the human eye, but also causes discomfort to the human eye. In severe cases, there may be a risk of retinal detachment! Therefore, if this kind of real image projection device is applied to a glasses-type display device, when the observation time (within a few hours) is prolonged, the intraocular pressure of the observer will increase, resulting in symptoms of dizziness and discomfort, and even severe retinal detachment. Therefore, it is not suitable for young children or those with heart disease or high blood pressure

However, if the real image is projected on the eyeball, if the magnification is to be increased, the distance between the projection lens group and the eyeball needs to be lengthened. In this way, if the image magnification is to be increased, the space occupied by the projection system needs to be increased, which is not practical. Not practical

[0004] In addition, when the user's head moves, the display device that forms a projected real image in the eyes will produce image blur or severe shaking due to ghosting and Doppler effect, so the display quality is not good, and the application field is not wide.

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