Écrans lisibles en plein soleil et haute luminosité
Comment choisir des écrans TFT LCD à haute luminosité (≥800 cd/m²) pour extérieur et exposition solaire directe.Why 500 nits Fails in the Sun
Direct sunlight delivers roughly 10,000 lux or more onto the glass surface. A 500-nit panel — perfectly readable indoors — washes out because reflected ambient light swamps the backlight. The working rule: an outdoor-readable panel needs to be several times brighter than any indoor part, which pushes real sunlight-readable modules into the 800–1500+ cd/m² range depending on mounting and shading.
The Brightness Tiers That Matter
| Tier | Typical luminance | Where it works |
|---|---|---|
| Standard indoor | 250–500 cd/m² | Offices, roofed kiosks |
| High-bright | 800–1200 cd/m² | Semi-outdoor, shaded, vehicle dash |
| Sunlight readable | 1500+ cd/m² | Direct sun, EV chargers, fuel dispensers |
Trade-offs: Power, Heat and Backlight Lifetime
Every extra nit costs power and heat. Backlight current scales roughly linearly with luminance, so a 1500-nit module may draw 3–4× the current of a 400-nit one of the same size. Plan the thermal path — metal frame, airflow or reduced duty cycle — and check backlight lifetime data at the higher current, not at the nominal rating.
Optical Bonding for Outdoor Contrast
Even a bright panel loses contrast to reflections at the air gap between cover glass and cell. Optical bonding fills that gap: it typically recovers a large share of outdoor contrast and eliminates internal fogging in humid, temperature-cycling environments. Many of our high-brightness models are available with optical bonding — send us the part number and we will quote the bonded version.
Modèles standard DISEA correspondants
Ces numéros de pièce de notre catalogue correspondent à ce guide — chacun est un modèle standard avec spécifications complètes et demande de fiche en un clic :
- DS-T034BOIA-01 — 3.4″ 800x800 IPS Round, 1000 cd/m²
- DS-T039BPSA-01 — 3.9″ 480x128 IPS Bar, 1000 cd/m²
- DS-T043QPS-02 — 4.3″ 480x272 TN, 1000 cd/m²
- DS-T043BPSA-02 — 4.3″ 480x272 IPS, 1000 cd/m²
- DS-T050QWH-05 — 5.0″ 800x480 TN, 1000 cd/m²
- DS-T050BWSA-02 — 5.0″ 800x480 IPS, 1000 cd/m²
- DS-T050BWSWA-02 — 5.0″ 800x480 IPS, 1000 cd/m²
- DS-T070QWHW-02 — 7.0″ 800x480 TN, 1000 cd/m²