why we need
Brightness Enhancement
Enhancing brightness for LCD displays is critical for ensuring optimal visibility, contrast, color accuracy, and longevity, ultimately enhancing the user experience and effectiveness of the display in various applications.
LCM Structure
- 1. LED Modification With Heat Dissipation
LED light strip replacement
| LEDs @20-25mA | LEDs @50-70mA | LEDs @100-150mA | |
|---|---|---|---|
| Brightness | 100% | 120-130% | 150-160% |
- 2. Films Adjustment And Replacement
Addition or replacement of BEF for brightness enhancement
| Without BEF | Add BEF | Add DBEF | |
|---|---|---|---|
| Brightness | 100% | 110-115% | 115-125% |
- 3. LGP Module Customization
Dual Side Technology: redesign lightguide panel without lightguide tool investment
| One Side LEDs @20-25mA | Dual Side LEDs @20-25mA | Dual Side LEDs @50-70mA | Dual Side LEDs @100-150mA | |
|---|---|---|---|---|
| Brightness | 100% | 150-160% | 190-200% | 200-250% |
- 4. Thermal Management
| LEDs @20-25mA | LEDs @50-70mA | LEDs @100-150mA | |
|---|---|---|---|
| Temperature | Normal | Hot | Very Hot |
- 4-1. LGP Structure
- 4-2. Heat Dissipation Method I
- 4-3. Heat Dissipation Method II
- 4-4. Heat Dissipation Chart – 24 hours
- 4-5. Power Efficient Solutions
Many standard LCMs in the market are designed for, either, normal temperature range usage, or utilizing low power (or low forward current) LED in its backlight.
EB-LCM can work on the following:
– LED Modification where the application can have a wider temperature range of -40 ℃ to 85 ℃.
– Upgrading low power LEDs that have forward current of 20~30 mA/LED to high power LEDs that have a forward current of 75~150 mA/LED. It will be coupled with a power efficient design that are adapted in industry such as automotive, industrial, aviation and more.
- 5. What Difference EB-LCM Can Offer
Micro-Size dotting gives a significant improvement on backlight brightness
For specimen size of 82 x 28 cm
- EB-LCM Laser: Dots quantity: 120,000 dots
- Others Laser: Dots quantity: 80,000 dots
| Silk Screen | Others Laser Dotting | EB-LCM Laser Dotting | |
|---|---|---|---|
| Dot Size | 0.8-1.0mm | 0.6-0.7mm | 0.2-0.3mm |
- 5-1. Core Technology LGP Laser Dotting
- Advantage: Dot Patterns
Laser dotting can achieve 0.2~0.3mm diameter.
Crater shaped dots can enhance brightness by 30% more than flat dots done by silk screen printing.
0.8~1.0mm
Flat surface dotting produced by silk-screen printing
- Advantage: Brightness
Why micro-size is better?
1. Higher dot density makes lightguide panel much brighter.
2. Micro-size concentrate higher energy for better brightness efficiency.
| Silk Screen | Others Laser Dotting | EB-LCM Laser Dotting | |
|---|---|---|---|
| Dot size | 0.8-1.0mm | 0.6-0.7mm | |
| Brightness | 100% | 115% | 130% |
- Advantage: Uniformity
To achieve outdoor legibility on standard LCM, backlight brightness must be increased to achieve over 1000 nits, brightness when measured on LCD surface. To meet this level of brightness, the prevailing market practice is to use high-powered LEDs. With conventional silk screen method of printing the pattern on the lightguide in most standard LCM, hot spots(or spot lights) can be clearly seen as a result of the LED pitch and the LED’s high brightness.
To fix this, EB-LCM is able to design and fabricate hot-spots-eliminating dotting patterns on the lightguide panel that corresponds to the LED pitch and shape of the LED strip.
- 5-2. Silk Screen Print VS. Laser Dotting
- What EB-LCM can do
LCM Brightness Enhancement.
Enhance standard LCM brightness of 400~500 nits become 1000 nits. With brightness enhanced to this level, outdoor application, with regards to legibility, will be achieved.