No, not all LEDs need a driver. While most standalone LEDs typically require a driver to operate properly, there are situations where LEDs can function without one:

1. Integrated Driver LED Bulbs: Some LED bulbs have built-in driver circuits and can be directly connected to standard household power sources without needing an external driver.

2. Low-Power LEDs: Some low-power LEDs (usually under 5 watts) can operate on standard power sources without additional drivers.

3. High-Temperature Environments: In certain high-temperature environments, LEDs can operate without specialized drivers, often used in industrial and automotive applications.

4. Driverless LED Technology (DOB Technology): This technology uses integrated circuits to regulate voltage, allowing LEDs to connect directly to AC power without an external driver.

However, for most LED applications, drivers are necessary as they provide stable voltage and current, ensuring optimal performance and longevity of the LEDs.