Light-emitting device driving module and camera module
AssigneeLG Innotek Co., Ltd.
InventorsMin KIM, Young Seop MOON, Joo Won KANG
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Abstract
A light-emitting device driving module according to an embodiment of the present disclosure comprises: a first switching device which connects a light-emitting device to a driving power source; a second switching device which connects the light-emitting device to a ground; a third switching device which connects the light-emitting device to a storage capacitor, and a controller which controls operations of the first to third switching devices, wherein charging of the light-emitting device is conducted by the driving power source and the storage capacitor and discharging of the light-emitting device is conducted by the ground and the storage capacitor.
Claims20
A light-emitting device driving module comprising:
- a first switching device connecting a light-emitting device and a driving power source;
- a second switching device connecting the light-emitting device and a ground;
- a third switching device connecting the light-emitting device and a storage capacitor;
- a fourth switching device connecting the light-emitting device and the storage capacitor and connected in parallel with the third switching device;
- and
- a controller controlling the operation of the first to fourth switching devices,
- wherein the light-emitting device is charged by the driving power source and the storage capacitor, and discharged by the ground and the storage capacitor.
A light-emitting device driving module comprising:
- a first switching device connecting a light-emitting device and a driving power source;
- a second switching device connecting the light-emitting device and a ground;
- a third switching device connecting the light-emitting device and a storage capacitor;
- and
- a controller configured to control the operation of the first to third switching devices,
- wherein the controller turns the third switching device on before turning the first switching device on to charge the energy of the storage capacitor to the light-emitting device.
A light-emitting device driving module comprising:
- a first switching device connecting a light-emitting device and a driving power source;
- a second switching device connecting the light-emitting device and a ground;
- a third switching device connecting the light-emitting device and a storage capacitor;
- and
- a fourth switching device connecting the light-emitting device and the storage capacitor and connected in parallel with the third switching device;
- and
- a controller configured to control the operation of the first to fourth switching devices,
- wherein the controller, during an initial operation for emitting light of the light-emitting device,
- turns the third switching device on for a first time, turns the first switching device on for a second time after the first time, turns the third switching device on for a third time after the second time, and turns the second switching device on after the third time.
Dependencies are inferred from the claim text.