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COB (Chip-on-Board) LCDs are, as explained by Focus LCDs, display modules where the controller/driver IC is mounted directly onto a printed circuit board (PCB) and sealed with epoxy, offering a robust, cost-effective solution for industrial and consumer devices. Known for durability, high contrast, and reliability in harsh environments, they are ideal for character and simple graphic displays.
Key Aspects of COB LCDs:
- Structure: The driver chip is placed on the PCB and connected via bonding wires, then sealed with a protective epoxy drop.
- Reliability: These modules are highly robust and often used in automotive, medical, and industrial equipment, according to DISPLAY VISIONS.
- Cost: Generally cheaper to produce than SMD-based modules.
- Applications: They are common in applications requiring character displays (e.g., ,characters) or simple graphics, as shown in the DISPLAY VISIONS product list.
- COB vs. COG: While COB is popular, it is often replaced by COG (Chip-on-Glass) technology, which offers a slimmer design and higher integration, notes AV-Display.
Advantages:
- High Durability: The potted chip design makes them strong against shocks and environmental impact.
- High Reliability: Fewer solder joints reduce failure rates.
- Low Cost: Highly cost-effective for large-volume, simple display needs.
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Web results
What is the Difference Between COG and COB LCD?
av-display.hk
https://www.av-display.hk › blog › what-is-the-differenc...
av-display.hk
https://www.av-display.hk › blog › what-is-the-differenc...
Jul 27, 2024 — COB (Chip-on-Board) is another method of integrating the driving IC with the LCD. In this technology, the IC is mounted directly onto a PCB ( ...Read more
People also ask
What is a COB in LCD?
A COB LCD (chip-on-board liquid crystal display) involves the LCD controller or driver being directly connected to the printed circuit board. The character display consists of a few basic components that have a very low probability of being discontinued.Jul 19, 2019
The Anatomy of a COB Character LCD - Focus LCDs
Focus LCDs
https://focuslcds.com › Journals
Focus LCDs
https://focuslcds.com › Journals
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A Complete LCD Display Screen Guide – Types, Working ...
Seeed Studio
https://www.seeedstudio.com › blog › 2025/12/05 › lcd-...
Seeed Studio
https://www.seeedstudio.com › blog › 2025/12/05 › lcd-...
What is a COB display?
COB, short for Chip-on-Board, is a cutting-edge LED display technology. In the COB LED manufacturing process, LEDs are integrated directly onto the Printed Circuit Board (PCB), almost as if they are printed onto the surface.
What is COB (Chip-On-Board) technology? - LED Studio
LED Studio
https://www.theledstudio.co.uk › what-is-cob-technology
LED Studio
https://www.theledstudio.co.uk › what-is-cob-technology
What is the difference between PCB and COB?
COB (Chip-on-Board) Technology is an advanced method of packaging electronic chips, especially LEDs, by mounting them directly onto the PCB (sealed with epoxy for protection), instead of in individual packages. COB merges two levels of packaging into one: The chip (component-level) and the PCB wiring (board-level).
Chip-on-Board (COB) - PCB Technologies
PCB Technologies
https://www.pcb-technologies.com › applications › chip-...
PCB Technologies
https://www.pcb-technologies.com › applications › chip-...
Web results
Chip on Board (COB) for displays
LCD-Module
https://www.lcd-module.com › displays › chip-on-board
LCD-Module
https://www.lcd-module.com › displays › chip-on-board
Display Visions supplies LCD modules from 1x8 characters (DIP module as COB) up to 4x40 characters (standard displays) in COB technology. Chip-on-board is ...Read more
COB vs COG vs COF LCD Modules
Longtech Optics
https://longtech-display.com › cob-vs-cog-vs-cof-lcd-m...
Longtech Optics
https://longtech-display.com › cob-vs-cog-vs-cof-lcd-m...
COB LCD Modules are created through a process of attaching microchips directly onto the circuit board, then covering them with epoxy or a similar protective ...Read more
What is COB LED Technology?
ViewSonic
https://www.viewsonic.com › library › tech › what-is-c...
ViewSonic
https://www.viewsonic.com › library › tech › what-is-c...
May 6, 2024 — Chip on board (COB) technology is a method of directly mounting red, green, and blue chips onto a printed circuit board (PCB).Read more
What Is the Difference Between COG and COB LCD?
Hua Xian Jing Display Limited
https://huaxianjing.com › Blog
Hua Xian Jing Display Limited
https://huaxianjing.com › Blog
Jun 11, 2025 — The COB and COG LCD difference comes from where the control chip, or driver IC, is placed in the display structure.
COB LCD displays, LCD module panels for industry
Display Visions
https://www.displayvisions.us › displays › cob-lcd-displ...
Display Visions
https://www.displayvisions.us › displays › cob-lcd-displ...
COB (Chip-on-Board) LCD displays for industry, automotive and medical technology. LCD displays each require one or more driver modules (s) to control them.Read more
Web results
The Anatomy of a COB Character LCD
Focus LCDs
https://focuslcds.com › Journals
Focus LCDs
https://focuslcds.com › Journals
Jul 19, 2019 — A COB LCD (chip-on-board liquid crystal display) involves the LCD controller or driver being directly connected to the printed circuit ...
COB Graphic LCD
Shenzhen Team Source Display Technology co.,ltd
https://www.tslcd.com › COB-Graphic-LCD_c12
Shenzhen Team Source Display Technology co.,ltd
https://www.tslcd.com › COB-Graphic-LCD_c12
TSD presents our advanced Chip-on-Board (COB) Graphic LCD modules, engineered for superior performance in harsh environments. These rugged displays combine ...Read more
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Chip-On-Glass (COG) -vs- Chip-On-Board (COB)
Newhaven Display
https://support.newhavendisplay.com › en-us › articles
Newhaven Display
https://support.newhavendisplay.com › en-us › articles
Dec 13, 2021 — COG displays are designed without a PCB. Instead, the LCD's driver/controller is directly bonded to the glass of the display.Read more
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