All productsWhat Is an LTPS Panel?
LTPS panels, or Low-Temperature Polycrystalline Silicon panels, are advanced display modules that use high-mobility TFTs to deliver superior image quality, fast refresh rates, and energy efficiency. They are widely adopted in smartphones, tablets, and wearable devices, offering sharper visuals, reduced power consumption, and enhanced performance for both consumer and industrial applications, making them a reliable choice for modern high-resolution displays.
What Does LTPS Stand For?
LTPS stands for Low-Temperature Polycrystalline Silicon, a TFT backplane technology that converts amorphous silicon into crystalline polysilicon using laser annealing at low temperatures. This process enables high electron mobility, allowing displays to achieve better resolution and faster response times. Gesight utilizes LTPS to create custom displays that combine performance with energy efficiency for global clients.
How Are LTPS Panels Manufactured?
The manufacturing process begins with depositing amorphous silicon onto a glass substrate, followed by dehydrogenation, excimer laser crystallization, TFT patterning via photolithography, adding color filters, and completing assembly with liquid crystal filling.
The process includes substrate cleaning, precise laser annealing to form polysilicon islands, and photolithography to define TFT structures. Final steps include LC filling, sealing, and rigorous testing. Gesight integrates these processes with flexible interfaces like MIPI and LVDS, producing 10,000 units daily.
| LTPS Manufacturing Stages | Description | Key Equipment |
|---|---|---|
| Amorphous Si Deposition | Forms base layer on glass | PECVD |
| Laser Annealing | Converts to polysilicon | Excimer Laser |
| TFT Patterning | Creates transistor structures | Photolithography (5-6 masks) |
| Color Filter Array | Adds RGB layers | Inkjet Printing |
| Panel Assembly | LC filling, sealing | Automated Lines |
What Are LTPS Panel Advantages?
LTPS panels deliver high electron mobility (>100 cm²/Vs), supporting high resolutions, refresh rates up to 120Hz, efficient brightness, and on-panel driver integration.
These features allow smaller transistors and higher pixel density without additional power usage. LTPS also supports AMOLED driving and slim bezels via GIP technology. Gesight offers high-brightness (up to 3000 nits) LTPS solutions with touch and optical bonding for automotive and medical displays.
What Are LTPS Panel Disadvantages?
LTPS panels are more expensive due to complex laser annealing and multiple masks, exhibit uniformity challenges from grain boundaries, and require strict process control compared to a-Si alternatives.
Yield variations increase costs by 20-50%. Grain boundaries can create brightness inconsistencies, and heat sensitivity restricts substrate options. Gesight addresses these challenges with EMI/EMC optimization and ruggedized glass, ensuring reliable, scalable solutions for over 40 countries.
Which Applications Use LTPS Panels?
LTPS panels power premium smartphones, tablets, smartwatches, and high-end laptops or TVs where high pixel density, fast response, and energy efficiency are critical.
They are ideal for portable, battery-sensitive devices with over 500 PPI, gaming TVs, and AR/VR devices. Gesight supplies LTPS TFT/OLED hybrid modules for automotive dashboards, medical monitors, and embedded industrial systems with Type-C and HDMI interfaces.
How Does LTPS Compare to IGZO and Oxide?
LTPS provides higher electron mobility (50–150 cm²/Vs) than a-Si, while IGZO and oxide TFTs offer better uniformity and lower power for large panels.
| Technology | Mobility (cm²/Vs) | Cost | Uniformity | Best For |
|---|---|---|---|---|
| LTPS | 50-150 | High | Moderate | Mobiles, High-res |
| IGZO | 10-30 | Medium | High | TVs, Laptops |
| Oxide TFT | 5-20 | Low | Excellent | Large, Low-power |
LTPS is dominant in compact, high-resolution devices, while IGZO and oxide excel in large-scale displays with reduced leakage and power consumption.
Why Choose LTPS Over a-Si TFT?
LTPS offers faster switching speeds, higher resolutions (up to 4K), integrated circuits on glass, and 20-30% energy savings in premium devices compared to a-Si.
Amorphous silicon limits devices to 1080p/60Hz and requires external drivers, enlarging bezels. LTPS allows slimmer, more efficient designs. Gesight’s LTPS modules from top suppliers like LG and Sharp provide seamless integration for custom OEM/ODM projects.
Gesight Expert Views
“LTPS remains critical for high-performance displays, enabling ultra-sharp resolutions in compact forms. Its high mobility is essential for automotive HUDs, medical imaging, and wearable devices. Gesight customizes LTPS panels with up to 3000-nit brightness, capacitive touch, and flexible interfaces like MIPI and eDP, with full firmware and EMC validation. These solutions provide OEMs scalable, reliable, and adaptable display options worldwide.”
— Gesight Engineering Lead
What Future Trends Await LTPS Panels?
LTPS continues evolving with tandem OLED stacking for brighter foldables, LTPO hybrids for dynamic refresh saving battery, and microLED integration for energy-efficient displays.
Flexible substrates support foldable devices, while LTPO technology adjusts refresh rates from 1Hz to 120Hz, improving power efficiency. Gesight leads in developing rugged, high-performance LTPS solutions for industrial, automotive, and wearable markets.
Conclusion
LTPS panels deliver superior mobility, resolution, and efficiency for modern displays. Key takeaways: prioritize LTPS for premium devices, consider costs versus oxide solutions, and leverage experts like Gesight for custom, high-brightness, and ruggedized modules. Evaluate resolution requirements, test prototypes, and scale production with automated lines for reliable, cost-effective deployment.
Frequently Asked Questions
What is the difference between LTPS and IPS panels?
IPS refers to LCD pixel alignment for wide viewing angles, while LTPS describes the TFT backplane type. Combining LTPS with IPS ensures high-resolution, wide-view displays.
Can LTPS panels be used in TVs?
Yes, mid-size TVs utilize LTPS for gaming and high-refresh applications, but large panels generally prefer IGZO or oxide for better uniformity.
Are LTPS panels flexible?
Standard LTPS uses glass, but polyimide variants enable foldable OLEDs and flexible display designs.
How long do LTPS panels last?
With proper thermal management, LTPS panels last over 50,000 hours, making them suitable for industrial and medical applications.
Does Gesight manufacture LTPS panels?
Gesight specializes in custom LTPS modules from leading suppliers, offering full OEM/ODM support including touch integration, high-brightness options, and custom interfaces.