DE202018004666U1 - Display visual acuity correction - Google Patents

Abstract

The protection claim relates to the use of a built-in a display individually adjustable visual acuity correction, which makes it unnecessary by changing the transmitter information on the eye visual optics in the viewer.

Description

State of the art, problematic:

Usually, in people with poor eyesight optical corrective aids such as glasses and contact lenses are necessary to allow the "sharpness", which is initially perceived as annoying. In the course of increasing use of displays to display image information - e.g. Mobile phones, tablets, vehicle instrument panels, monitors - it makes sense to process the image information in this case so that the image correction using glasses, etc. can be omitted. Depending on the correction requirement, the image information should be individually adjustable to the display user.

Usual displays are designed in the present time initially to represent an extremely "sharp" image with high resolution (pixels) and high frequency, which is perceived as realistic for the healthy eye. In addition, corrections to displays in the area of contrast image brightness or even magnifier function are offered, if at all, in order to adapt individual requirements to the image information.

In applications of state-of-the-art display technology, in addition, high depth-of-field shades up to 3D effects (without additional eyeglasses) are created to convey a plastic image impression. The difficulties of refraction, or retinal projection, are not taken into account by the display configuration.

Example hyperopia:

Essential: The angle of incidence of the pixels on the lens of the eye is changed by the spectacle lens in such a way that by focusing it is still possible to focus on the retina.

to protection

The protection claim relates to the use of a built-in a display individually adjustable visual acuity correction, which makes it unnecessary by changing the transmitter information on the eye visual optics in the viewer.

The problem that image correction always occurs at the receiver e.g. by means of glasses and not already at the transmitter, the display, can be countered with different approaches. All solutions shown here follow the basic principle that only the sensory nerve cells of the retina are stimulated which are necessary for a sharp representation of the image information and that the visual acuity correction already takes place at the transmitter of the image information.

1) By using extremely thin screens with high resolution and their individually adjustable curvature or a lens function on the transmitter. This function ensures that pre-focusing already takes place at the transmitter.

2) An algorithm that allows one pixel to appear multiple times at different locations on available high-resolution displays at the appropriate clock rate (e.g., target 11K resolution) at different levels so that it is perceived by the eye as a directed light beam.

Due to this "direction" of the light beam, the additional refraction of light otherwise made by the spectacle lens becomes unnecessary.

As a result, the assumed depth of field or 3D simulation is reduced in the image, but this is irrelevant for the application of visual acuity correction at first, since this is limited to the 2D range (for example, the reading of writing and symbols).

3) If the image information from the transmitter / display is higher-resolution than the eye / even the healthy eye can perceive at all, the image information can be focused in advance and be emitted more intensely in terms of brightness.

As an example: With a poor resolution with few and therefore large pixels, the image information encounters a relatively large number of sensory nerve cells of the retina in the healthy eye, forming a rough image. With added visual impairment even more visual cells are activated, the picture becomes even blurred. With a high resolution of the display, the image information in the center of the transmitting pixels and in the brightness must be intensified so that the visually impaired eye compensates for this prefocusing by the defective vision.

The smallest perceptible pixel (A) differentiated from the eye is focused in the healthy eye through the lens (B) on the retina (C). ( 1 ) Here, min. a sensory nerve cell (D) irritated.

For the same transmitter behavior as in 1 described the pixel (A) in case of ametropia, eg farsightedness through the lens (B) is no longer focused on the retina (C). ( 2 ) In doing so, significantly more sensory nerve cells (E) are irritated. By this scattering a blurred overall image is perceived, as thus adjacent pixels are superimposed.

Now the sent pixel (A ') at the transmitter is reduced ( 3 ) and the differential area to the pixel A is not illuminated by the lens (B) is not focused on the retina (C). Since, however, this pixel can not be perceived differently by the eye, the scattering is reduced so that only the sensory nerve cells are analogous to the healthy eye (F) as in 1 be irritated described. This eliminates a superposition resulting in a sharp overall picture.

Claims (1)

The protection claim relates to the use of a built-in a display individually adjustable visual acuity correction, which makes it unnecessary by changing the transmitter information on the eye visual optics in the viewer.

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