It’s possible to represent logical OR and AND gates in PlantUML component diagrams by using custom shapes or annotations, though PlantUML doesn’t natively provide specific symbols for logic gates like a dedicated digital circuit design tool would. PlantUML is primarily designed for UML diagrams (e.g., component, class, sequence diagrams), but it’s flexible enough to allow customization through its syntax. Here's how you can approach this:

@startuml
[OR Gate] #--> [Output]
[Input 1] --> [OR Gate]
[Input 2] --> [OR Gate]
[AND Gate] #--> [Output]
[Input 3] --> [AND Gate]
[Input 4] --> [AND Gate]
@enduml