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HOME > R&D Institute > BLU inspection algorithm development

BLU (Back Light Unit) Configuration

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Protector Sheet (Scratch easily occurs during assembly)
➡ prevents moire which is occurred by prism sheet and gives wide view angle by light diffusion
Prism Sheet ➡ refract and condense the light to rarise the grey level by diffuser sheet
Diffuser Sheet ➡ uniformly disperse the light which has passed through LGP to the entire surface
LGP (Light Guide Panel) ➡ uniformly distribute the light which comes from Lamp
Reflector Sheet ➡ reflect the bottom light of LGP
Mold Frame ➡ cases for fixing each BLU part
Lamp Reflector ➡ prevent light leakage
FPCB (Flexible Printed Circuits Board) ➡ flexible circuit board which supplies power and drives the Lamp

BLU Inspection System

BLU structure is same as the above image. Defective BLU will be produced depending on surface dirt or assembly incompleteness of each sheet.
Because dust and pollution of sheets may cause defective BLUs leading huge losses, preliminary quality inspection is highly required.If inspection is conducted manually, the quality of inspection may be differ and instable depending on skill, health and attitude of each operator.
With defect related data base accumulated during inspection process, this BLU inspection system is automatically operated in high speed and inspects very accurately.
Thus our customers will achieve high productivity and enhanced quality control.

BLU Assembly System

BLU Assembly System is developed to minimize the possibility of producing defective BLUs by the operators and operating environment.
This machine assembles BLU in high speed and inspects accurately with defect related data base making high productivity.
BLU assembly and inspection processes can be integrated as IN_LINE Type.

* This advanced system is operating with higher process improvement and achieves more productivity.

Sample Images of Inspecting Defect

Our own inspection algorithm shows the process of precise defect detection.

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Mura Defect

Point type Dark Mura

Point type Bright Mura

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Line Defect Image

Bright Line (Scratch)

Dark Line (Thread)

Bright Mura (Line type)

Fault Fabrication (Missing Sheet)

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