Projection focusing method, micro projector and mobile terminal
A technology of micro-projection and focusing method, applied in the field of projection, can solve the problems of insufficient precision, affecting the appearance, exposed gears, etc., to achieve the effect of enhancing user experience
Active Publication Date: 2012-06-13
DONGGUAN YULONG COMM TECH
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Problems solved by technology
There are two obvious defects in the way of using fingers to adjust the gears. The first is that the accuracy is not enough, and the operating accuracy of the human hand is limited; the second is that the gears need to be exposed outside, which affects the appearance, especially in portable devices such as mobile phones.
[0003] There are also plans to use the method of receiving infrared reflection to control the movement of the motor, so as to complete the automatic focus, but the method of using infrared reflection to judge the projection distance to control the motor to adjust the focal length requires additional infrared radiation and receiving devices. The transparent window is opened on the top, which increases the device and cost
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0019] figure 1 It is a schematic diagram of the composition and structure of a micro-projection device in an embodiment of the present invention. As shown in the figure, the micro-projection device includes at least a motion sensing unit 10 and a projection focus control unit 20, wherein:
[0020] The motion sensing unit 10 is used to obtain directional operation control information implemented by the user on the micro projection device through the motion sensor. ...
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The embodiment of the invention provides a projection focusing method for a micro projector. The method comprises the following steps of: acquiring directional operating control information applied by a user to the micro projector through a motion sensor placed in the micro projector; and controlling a focusing motor according to the acquired operating control information to pull a lens to perform projection focusing. Correspondingly, the embodiment of the invention also provides the micro projector and a mobile terminal. According to the method, the user can conveniently adjust the projection focal length of the micro projector, and any influence on the appearance of the projector cannot be caused.
Description
technical field [0001] The invention relates to the field of projection, in particular to a projection focusing method, a miniature projection device and a mobile terminal. Background technique [0002] Micro-projection devices are also called portable projection devices. The current micro-projection devices can be divided into two categories: "embedded" micro-projection devices that can be built into mobile phones, notebook computers, and portable playback terminals, and those that can be directly played or acquired. "Stand-alone type" for connecting other devices. The existing miniature projection device pulls the projection lens forward and backward by manually adjusting the linkage gear, thereby adjusting the focal length to achieve a clearer projection effect. There are two obvious defects in the way of adjusting the gears with fingers. The first is that the precision is not enough, and the operating precision of the human hand is limited; the second is that the gears ...
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IPC IPC(8): G03B21/53G03B21/00
Inventor 冯舒宇张伟
Owner DONGGUAN YULONG COMM TECH