Projection system, driving device and driving method

A driving device and driving current technology, applied in the field of projection systems, can solve the problems of increasing electromagnetic interference, affecting the normal operation of the projection system, increasing the deployment cost of the driving device, etc., and achieving the effect of low deployment cost

Active Publication Date: 2022-03-18
CORETRONIC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the projection system requires more light-emitting elements, the deployment cost of the driving device will also increase
In addition, once the number of driving devices increases, the on / off switching of multiple switches inside the driving device will increase electromagnetic interference, thereby affecting the normal operation of the projection system

Method used

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  • Projection system, driving device and driving method
  • Projection system, driving device and driving method
  • Projection system, driving device and driving method

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Embodiment Construction

[0019] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings.

[0020] Please refer to figure 1 , figure 1 It is a schematic diagram of the projection device 10 according to the first embodiment of the present invention. In this embodiment, the projection device 10 is such as a projector, and the projection device 10 includes a light source module LM and a driving device 100 . The light source module LM has light emitting elements LD_1 to LD_n, and the light emitting elements LD_1 to LD_n are connected in series to each other. The driving device 100 is used to drive the light source module LM. In this embodiment, the light emitting elements LD_1˜LD_n may be implemented by laser diodes (laser diodes), but are not limited thereto, they may also be implemented by light emitting diodes (Light emitting diod...

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Abstract

The invention provides a projection system, a driving device and a driving method. The driving device is used to drive the light source module with multiple light emitting elements connected in series. The drive device includes a power supply circuit, a current controller and a voltage follower circuit. The power supply circuit adjusts the output voltage according to the adjustment signal, and drives the light source module by the output voltage. The current controller includes switches. The current controller controls the switch to maintain the current value of the driving current flowing through the light source module at a preset driving current value, and provides a control signal according to the energy consumed by the switch. The voltage following circuit provides adjustment signals according to the control signals. In this way, the projection system can have a driving device with low deployment cost, and the driving device will not generate large electromagnetic interference.

Description

technical field [0001] The present invention relates to a projection system, a driving device and a driving method, and the driving device and the driving method of the present invention particularly relate to a driving device and a driving method for driving a plurality of light-emitting elements connected in series. Background technique [0002] Most current projection systems convert a fixed DC input power into multiple power sources, so as to control multiple driving devices to drive multiple groups of light emitting elements. In other words, each group of light emitting elements needs to be driven by a driving device. Therefore, when the projection system requires more light emitting elements, the deployment cost of the driving device will also increase. In addition, once the number of driving devices increases, switching on / off of multiple switches inside the driving device will increase electromagnetic interference, thereby affecting the normal operation of the proje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14G03B21/20H05B47/105
CPCG03B21/14G03B21/2013
Inventor 陈振旺纪信维叶英杰
Owner CORETRONIC
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