FAQ
What is a COB LCD Display?
A COB LCD Display is a monochrome LCD module in which the driver IC is bonded directly onto the PCB. The module normally includes LCD glass, PCB, driver IC, connection structure and optional LED backlight.
Is COB LCD a display content type?
No. COB describes the module structure. The display content can be segment, character, graphic or dot matrix depending on the project.
What is the difference between COB and COG LCD?
COB bonds the driver IC on the PCB, while COG bonds the driver IC directly onto the LCD glass. COB normally provides more PCB-level integration flexibility, while COG is usually thinner and more compact.
When should I choose COB LCD?
Choose COB LCD when the project needs a stable PCB-based module with flexible connector, backlight, mounting, touch-button or circuit integration.
When should I choose COG LCD instead?
Choose COG LCD when product space is limited and a thinner, more compact glass-based module is more important than PCB-level flexibility.
Can a Segment LCD use COB structure?
Yes. Segment LCD describes the display content, while COB describes the module structure. A custom segment LCD can be assembled as a COB LCD module.
Can a Character LCD use COB structure?
Yes. Character LCD modules such as fixed text-row displays commonly use PCB-based COB construction.
Can a Graphic LCD use COB structure?
Yes. Selected monochrome graphic LCD modules can use COB construction when PCB-level integration, backlight and connector flexibility are required.
Can COB LCD modules use LED backlights?
Yes. LED backlight color, brightness, light guide, current and mechanical structure can be reviewed according to the project.
Can COB LCD modules include touch buttons?
Yes. Capacitive touch buttons or other front-panel functions can be reviewed for selected projects, depending on PCB and front-panel design.
What LCD technologies are available?
COB LCD projects can use TN, HTN, STN, FSTN or VA LCD technology depending on contrast, viewing angle, display color, multiplex ratio and cost.
What display modes are available?
Positive or negative display modes and reflective, transmissive or transflective optical modes can be reviewed.
What interfaces are available?
The interface depends on the driver IC and PCB design. I2C, SPI, parallel, segment-driver output or another project-based interface can be reviewed.
Can the PCB outline be customized?
Yes. PCB outline, mounting holes, connector position, pin header, cable direction and component layout can be reviewed according to the product structure.
Can you replace an existing COB LCD module?
Yes. Please provide the original module, photos, drawings, PCB outline, connector, pin definition, display content, backlight and product information.
Is COB LCD suitable for very compact products?
COB can be used in compact products, but when the smallest thickness and footprint are critical, COG LCD may be more suitable.
What is the main limitation of COB LCD?
COB modules are normally thicker and larger than COG modules, and highly customized PCB, IC and connector structures can make replacement more project-specific.
What information is required for quotation?
Please provide display content, LCD size, viewing area, LCD technology, positive or negative mode, optical mode, backlight, PCB outline, connector, interface, temperature, quantity, schedule and available drawings or samples.
