What Is A COB LED Display?
Structure Of COB
LED Screen Features Of COB Technology
COB LED Display Advantage And Disadvantages
Application Of COB
The LED display screen is composed of many LED lamp beads; COB is one of the main LED technology; let us take a detailed look at COB LED Display:
1. What Is A COB LED Display?
What does COB stand for? According to Wikipedia, COB is the abbreviation of the chip on board. In short, the light-emitting chip is directly integrated and packaged on a particular PCB board; no standoffs and no solder pins, not limited by package size; this allows for smaller dot pitch arrangements.
COB Display encapsulates LED chip technology (upstream), display technology (downstream), and packaging technology (midstream), which makes COB LED screens a widely used solution with multiple uses.
2. Structure of COB
3. LED Screen Features of COB Technology
- Ultra-small spacing, higher-definition display:
COB LED displays can easily achieve pitches smaller than 1.0mm and dot pitches that cannot be achieved with SMD LED pitches. We know that the more pixels a unit display, the better the display looks.
PCB boards with a thickness of 0.4mm~1.2mm can be used according to customer needs, about 1/3 lighter than traditional LED displays.
- Wide viewing angle:
The COB LED Screen viewing angle is greater than 175° and close to 180°.
4. COB LED Display Advantages and Disadvantages
- High protection:
COB LED is anti-collision, moisture-proof, dust-proof, anti-oxidation, anti-static, can usually work even at -30° and 80°, and can better adapt to the installation environment.
- Good heat dissipation:
COB LED Screen products encapsulate the lamp tube on the PCB board, which can quickly transfer the heat of the lamp wick through the copper foil on the PCB to achieve easy heat dissipation.
- Wear-resistant and easy to clean:
The surface of the COB LED Screen is smooth and hard, impact-resistant, and wear-resistant. If there is dust on the LED screen, wipe it with a cloth.
R&D can also achieve finer potential since there is no single LED diameter; R&D can also achieve more OK potential.
- Technical process:
Reduce the cost of COB LED lamps, simplify the production process, reduce the thermal resistance of LED chips, and achieve high-density packaging.
4 Technical Things to Consider When Buying COB LED Displays
- High maintenance costs:
Professional maintenance equipment and technicians are required.
- The color rendering is not uniform enough:
The first step of not choosing the lamp beads results in poor color and brightness consistency.
- Poor surface flatness:
Because each LED lamp bead will be individually packaged, the flatness of the surface will be sacrificed.
- High manufacturing cost:
Due to the high defect rate and high scrap rate, the manufacturing cost far exceeds the small pitch of SMD LEDs.
Due to the above four main problems, the accumulation of COB in industry and process details needs to be improved. Although COB technology has made certain breakthroughs in the display field, it does not mean that SMD LED has completely withdrawn and declined.
In this field, SMD LED packaging technology relies on mature and stable product performance and is deeply loved by buyers. It is still the choice direction suitable for users and the market.
5. Application of COB
COB packaging technology reflects its technical advantages and value in the range of 0.5mm~1.00, so there are many applications:
Monitoring center, command center, high-end conference room, studio, etc.
If any LED screen questions please contact us.