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DGF Segment answers situations where full frosting would be too much. A room can retain a view above eye level, a home can screen the lower window area, and a display can reveal only a selected part. It requires discipline: the zone line after lamination is not an app setting.
First describe the view that should disappear and what should remain visible. Then test the division from seated and standing positions, corridor, camera and under daylight and evening lighting.
1. Define scenes before drawing lines
Instead of asking how many zones, ask when users need to screen a view and what should stay visible. A room may only need open–private, so Classic is simpler. Segment is justified when independent fields change how space works, not merely how a wall looks.
Name each scene plainly: meeting at table, screen work, street privacy, product display. If it cannot be named, switch labels, automation and handover testing will be difficult.
| Scene | Privacy extent | Control logic |
|---|---|---|
| Open space | All agreed zones clear | One labelled entrance scene |
| Table discussion | Screen zones along participant sightlines | Locally selected scene |
| Partial display | Reveal the selected product area | Staff switch or agreed schedule |
2. Sightlines matter more than symmetry
Equal divisions may look good in elevation yet fail to screen a seated person or unnecessarily close a view. Check eye level for user and observer, desk, monitor and camera. Mark them on plan or photo.
For windows, street views and neighbouring buildings matter. For a consulting room, reception and corridor. For a display, passer-by and display lighting. One product does not create a universal division.
3. Zoning is a manufacturing and electrical decision
Zones, boundaries, pane format, holes, cable-exit edge and field positions must be unambiguous on drawings before lamination. A finished active pane is not reworked on site. A late functional change can mean redesigning the complete pane.
Each independent field needs thought about circuits and controls. Do not plan maximum scenes merely because they are possible. Users should understand what a switch changes and how to return to ordinary mode.
4. Check light in both states
The frosted state scatters light, yet a strong source behind a user can reveal a shadow. Zones do not remove this physics; they can create new contrasts between fields. A sample, visual review and evening check are better than promising complete invisibility.
Where blackout, solar control or acoustic confidentiality is required, state it separately. Selecting the complete partition and other shading happens beyond the zoning decision.
5. Zoning brief
Send a plan or photo with sightlines drawn, not only a zoning pattern. It lets the team check whether fields answer what users actually see.
- views to retain and screen
- user heights and furniture/screen positions
- size, frame and all processing
- scenes that should switch with one action
- cable, power-supply and switch locations
In practice: Segment is a good choice when it reduces a compromise. If it does not change use, a simpler full pane may be better.