![PDLC vs PNLC · Comparing the Two Smart Film Technologies · Which to Choose [2026] | InHouse](/assets/uploads/portfolio/analog-devices-thailand-meeting-room/smart-film-analog-devices-thailand-meeting-room-opaque-mode-exterior-view.jpg)
The Shortest Summary · in One Sentence
PDLC = standard smart film, "opaque" by default and clear when powered · PNLC = Reverse Mode smart film, "clear" by default and opaque when powered — choose based on whether you want the glass "opaque" or "clear" when the power is off.
How It Works · How the Liquid Crystals Align
Both PDLC and PNLC use the same Liquid Crystal — a semi-solid, semi-liquid material that changes its alignment under an electric field. The difference lies in the polymer structure that encapsulates the liquid crystal and how it behaves when no current flows.
PDLC · Polymer Dispersed Liquid Crystal
The liquid crystals sit in tiny droplets dispersed through a polymer layer (like peppercorns scattered in a thick soup). With no power, the crystals point randomly and scatter light → opaque; when powered, they line up in a single row and let light through → clear.
Rule of thumb: switch on = clear · switch off = opaque
PNLC · Polymer Network Liquid Crystal
The liquid crystals sit within a polymer network engineered to force them into a tidy alignment when no power is applied → clear · when powered, the crystals are pushed into disorder and scatter light → opaque (Reverse Mode).
Rule of thumb: switch on = opaque · switch off = clear
Why the "Default State" Matters Most
Choosing PDLC vs PNLC isn't about "which one is better" — it's about "what state you want the glass to be in when the power goes out", because the default state is the state the film reverts to when no current flows — and that has a big impact on:
- 1) Safety — rooms that need privacy at all times (a bathroom, for example) should use PDLC so they turn opaque on power loss.
- 2) Presentation — a showroom that needs the glass clear at all times to display products should use PNLC so it stays clear on power loss.
- 3) Energy cost — match the default state to the state you use for the longest → save on power.
Real case: some large-meeting-room clients choose PNLC because they keep the glass clear as the default 80% of the time and only switch it opaque for confidential meetings — cheaper to run than PDLC, which would need power kept on to stay clear.
Choosing PDLC or PNLC by Use Case
| Use Case | Recommended | Why |
|---|---|---|
| Sexy Bathroom | PDLC | privacy by default · safe on power loss |
| Bedroom · Family room | PDLC | privacy as normal, clear when you need it |
| Boardroom (privacy default) | PDLC | opaque by default, clear when opening the meeting up |
| Glass Wall meeting room (showroom-style) | PNLC | clear throughout, opaque only for confidential talks → saves power |
| Car / watch / fashion showroom | PNLC | clear all opening hours, opaque only when closed |
| Clinic / hospital exam room | PDLC | privacy default to protect patients |
| Building facade (day-night) | PDLC + Aquaris™ | privacy at night · clear by day with power applied |
| Reception hall | PNLC | clear to welcome guests · opaque during private meetings |
Energy Cost · Which Is More Economical?
Short answer: it depends on which state you keep for longer. Neither PDLC nor PNLC is inherently more economical.
- · PDLC draws power when "clear" — if you want it clear for 12 hours a day → you pay for 12 hours of power.
- · PNLC draws power when "opaque" — if you want it opaque for only 2 hours a day → you pay for just 2 hours.
- · Power rate: ~3W/sqm/hr · a 15 sqm meeting room · clear for 8 hours = ~0.36 units/day ≈ 1.5 THB/day
Rule: set the default state (the unpowered state) to match the state you use for the longest in daily life → lowest energy cost.
Power Loss · What Happens?
PDLC · Safe on Power Loss
The film reverts to opaque instantly — privacy is preserved, so bathrooms, bedrooms and exam rooms have no issue. Ideal where privacy matters most.
PNLC · Clear on Power Loss
The film reverts to clear instantly — great where you don't want it to "go dark", such as showrooms · corridors · lobbies, but should not be used in bathrooms or confidential rooms.
Note: if you're concerned about privacy during a power loss with PNLC, you can add a small UPS or battery backup to keep the film powered only during critical moments.
Availability in the Thai Market
In the Thai market, PDLC is widely available from many brands, while PNLC is still rarer because its production process is more complex and it serves a niche. InHouse Technology is an R&D Brand Owner that controls production of both PDLC and PNLC in Thailand, so it can order in either mode with a custom MOQ of just 3 sqm/color, choosing shades from a film color catalog of over 33,000 shades.
- · InHouse Smart Film 3 Series (Indoor / Outdoor / Performance) come in both PDLC and PNLC
- · InHouse Smart Glass uses PDLC as standard · PNLC available to order per project
- · Production lead time: PDLC in 18 featured stock colors 1–3 days · custom 10–20 days
PDLC/PNLC + InHouse R&D Enhancement Layers
InHouse smart film isn't just ordinary PDLC or PNLC — we R&D proprietary enhancement layers no one else in Thailand can:
Aquaris™ (Outdoor Series)
A layer against water, humidity and UV — extending lifespan by +80% versus standard market PDLC · for facades, balconies and outdoor areas.
Lucida™ (Performance Series)
A Pure Clarity layer that reduces haze several-fold versus standard PDLC, until it's nearly indistinguishable from bare glass. Ideal for labs, hospitals and glass houses.
Frequently Asked Questions · PDLC vs PNLC
Which lasts longer, PDLC or PNLC?
By the nature of the technology, both have similar lifespans — the bigger factors are the enhancement layers and production quality · InHouse PDLC Indoor 12+ years · with the Aquaris™/Lucida™ +80% boost · InHouse PNLC uses the same base, so its lifespan is no different.
Is PNLC more expensive than PDLC?
Generally slightly more (~10–20%) because its production MOQ is lower and it's more complex · but over the long term, if PNLC fits your use case → the energy savings offset the difference within 2–3 years.
Can I choose PDLC now and switch to PNLC later?
You can't switch modes on the existing film · you have to remove it and install PNLC afresh · smart film peels off easily in 1 day · Smart Glass requires replacing the whole pane.
Can I mix PDLC + PNLC in a single project?
Yes, and it's common — for example: bathroom + bedroom on PDLC · lobby + front-of-house showroom on PNLC · the control system (remote / Smart Home app) manages them all in one app.
How does PDLC + Aquaris™ differ from standard PDLC?
Aquaris™ is an InHouse R&D layer applied on top of the base PDLC · adding resistance to water, humidity and UV degradation · increasing lifespan by +80% versus standard market PDLC · it's not a separate technology, but an enhancement layer that makes Outdoor PDLC withstand real-world conditions.
Consult an InHouse Engineer · Free
Tell us whether your project will keep the glass "clear" or "opaque" for longer, and we'll advise whether it should be PDLC or PNLC · at no charge.
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