Display system and method capable of adjusting image focal length automatically

Abstract

The invention discloses a display system and method capable of adjusting the image focal length automatically. The display system comprises a handheld display device, an image capturing device, an electric control lens and a control device. The display system captures an image through the image capturing device, the control device judges whether the face of a user wears a pair of glasses or not according to the captured image and then drives the electric control lens to adjust and control the image focal length of the handheld display device automatically, and therefore a display image of the handheld display device is made to be suitable for watching through the vision of the user.

Description

technical field [0001] The present invention relates to a display system and method, in particular to a display system and method for automatically adjusting image focus. Background technique [0002] With the popularization of current handheld display devices, there are certain users of various age groups, but limited by the convenience of portability, the display screens of handheld display devices such as mobile phones, tablet computers, personal digital assistants or notebook computers, etc. It cannot be too large, so for users who have both myopia and presbyopia symptoms, the user cannot clearly watch the displayed image on the display screen due to the change of viewing distance during use. If a user with normal vision has symptoms of presbyopia due to age, he can usually correct the focal length of the object imaging by wearing convex lens glasses to watch a handheld display device at a close distance; but if the user is originally myopic, when When you have symptoms...

AI Technical Summary

Problems solved by technology

[0002] With the popularization of current handheld display devices, there are certain users of various age groups, but limited by the convenience of portability, the display screens of handheld display devices such as mobile phones, tablet computers, personal digital assistants or notebook computers, etc. It cannot be too large, so for users who have symptoms of myopia and presbyopia at the same time, the user cannot clearly watch the displayed image on the display screen due to the change of viewing distance during use

If a user with normal vision has symptoms of presbyopia due to age, he can usually correct the focal length of the object imaging by wearing convex lens glasses to watch a handheld display device at a close distance; but if the user is originally myopic, when When you have symptoms of presbyopia, although you can see distant objects normally by wearing myopia glasses, you need to remove the myopia glasses to obtain a normal viewing focus for short-distance hand-held display devices without blurring. This action often causes users Therefore, for users in this situation, the following solutions can generally be adopted, such as carrying presbyopia glasses and nearsighted glasses at the same time or wearing a pair of multifocal glasses, but carrying multiple pairs of glasses will still cause the user to use them alternately Inconvenience; while multi-focal glasses have different lens curvatures in different viewing angle areas. For example, the upper half of the glasses is generally designed to see distant objects, so it can be used for myopia correction. The lower half of the glasses is generally designed to see near objects, so it can be used For the correction of presbyopia, but the use of different areas of the glasses varies according to the user's habits, which may cause some users to adapt poorly and cause dizziness

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