- 8 months ago (Mj 8 months ago)
- Gabriel Tjappa
True Tone found on iPad since 2016 and iPhone since 2017, is a feature that manages the white balance of the screen so that it gives the same appearance as the user's environment on the screen, regardless either the situation.
A white balance setting can display a more blue or orange, "cooler" or "warmer" white, depending on where the user is located, with the True Tone setting compensating for this change to minimize the effect.
Apple has an idea to improve its True Tone system.
A material improvement from True Tone coming?
There are still drawbacks to current technology. Indeed, a display and color management system may not necessarily be able to provide sufficient color accuracy if the screen is used to display shades of white different from those produced by backlighting. Generally, the screens are adjusted to allow the user to see what he perceives as a "correct" white, but the display can take these modifications into account by adjusting the pixel values, for example by reducing the blue pixels and green to display warmer white.
Improved white balance
In a patent granted by the US Patent and Trademark Office to Apple, the document "Display with a suitable backlight color for the environment" attempts to resolve these problems by incorporating changes in the white balance to those used for backlighting. Rather than relying on a single backlight providing a single shade of white, Apple suggests using several different light sources within the backlight system.
The document explains in detail how backlighting could include a light guide layer with opposing surfaces capable of reflecting it, as well as an ambient color light sensor and control circuits.
Multiple light sources in the backlight can set different color temperatures between hot and cold lights, with the control circuits adjusting the light intensity of each to create a mixture of a specific color temperature. In certain implementations, these light sources could be light-emitting diodes putting blue and intravenous light, covered with red, green and yellow phosphorus. It is also possible to use a third light source providing a different color temperature than the other two, in order to further refine the light produced.
Using an ambient light sensor gives the screen the ability to determine the type of light in the local environment it is facing, allowing it to adjust the backlight to perform a similar function. that of True Tone software. It could also monitor the brightness, allowing the screen to darken or become brighter and maintain comparable readability over time. This means that the system would not need to use a software solution to perform the True Tone effect, something that could potentially improve the performance of the system. Likewise, we imagine that the battery would be less stressed.
Apple and its patents.
Apple files numerous patent applications with the USPTO every week, but if the existence of document repositories does not guarantee that a product or service will have this functionality in the future, it at least suggests areas of interest. for society. The next iPhone 11 and iPad Pro could be the first to benefit.