Can LCD viewable angle become adjustable?

No, they cannot. LCD viewing angles are hardware, not software.

While you cannot change it with software, you can install a physical privacy filter.

3M makes privacy filters specifically for laptops.

Just search on Privacy Filters and you will find them.

Chas

While in theory you could be able to adjust anything with electronics, the practical reality is that you may not be able to afford the end product or even justify the R&D costs.

For all of the LCD and Plasma displays that I am aware of on the market today, the viewing angle and related parameters are all part of the physical hardware design and cannot be adjusted electronically.

Right now, resolution, sharpness of detail, response time, and a wide viewing angle are the critical parameters for display design.

I suppose that when we reach the practical limits of basic display design that manufactures might look at what "new" features could be offered. But, there would need to be at least a perception of a broad enough market to justify the research and design costs.

Chas