Optical Bonding

Optical Bonding is used to combine the Glass or T/P with LCM.

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Optical Bonding enhances the LCD to restrict the conditions of the application environment, such as strong sunbeams or damp environment.

Under the outdoor sun (approx. 10000 nits), the surface of the LCD tends to reflect sunbeams so that the content of the LCD cannot be clearly identified.

Humidity effect: To strengthen the bonding of film-coated Glass onto the surface of LCD, Optical Bonding can prevent moisture and dust from entering the inner side of LCD.
Tempered glass can be selected to enhance the impact resistance of the LCD in order that the surface of the LCD will sustain certain foreign force without damage.

 

Conventional way of solving the problem in enhancing the brightness of backlight with outdoor optical method

Increase the light-enhancing film.CCFL (boost the current of the tube).Increase the number of LED dice.The above-said method brings about effects on cost, life, heat radiation and contrast, etc.

Solutions with Optical Bonding

Optical Bonding is used to combine Glass and LCD to minimize the light reflection during the process.Glass surface treatment is utilized to reduce the reflection rate and permeability rate of the light.Reduced influence to the backlight of the lamp tube and LED in the aspects of cost, heat radiation and life

Light Reflection Scheme and Typical Calculation Example

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ReflectedLight No enhancement Optical Bonding
R1 4.5% 0.3%
R2 4.5% 0.1%
R3 4.5% 0.1%
TOTAL 13.5% 0.5%

Sunlight brightness is 10,000 nits LCD Brightness=400 nits CR = 1 +(display brightness / reflected light)

No enhancement

CR=1+(400 / 10000*13.5%)=0.296 0.296:1
The beam calculated at 13.5% for the LCM Reflection Rate will be 1350 nits.
Reflection light 1350 nits > LCD 400 nits LCD (content non-identifiable).

Optical Bonding

CR=1+(400 / 10000*0.5%)=9 9:1
When calculating the reflection rate of LCM at 0.5%, the light reflected will be 50 nits.
Reflection light 50 nits > LCD 400 nits LCD (content identifiable).