Optical navigation device and optical navigation method
An optical navigation and light source technology, applied in the field of optical navigation devices and optical navigation, can solve the problems of power consumption, storage power reduction, calculation amount and power consumption increase, etc. Effect
Active Publication Date: 2017-06-30
PIXART IMAGING INC
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However, in this way, since the light source 101 continuously illuminates the surface 102, the image sensor 105 continuously captures images, and the controller 103 also needs to continuously calculate, it consumes a lot of power.
Especially when the optical navigation device is moving at high speed, because it will increase the difficulty of tracking, it will need to perform lighting, image capture and calculation at a higher frequency, so the amount of calculation and power consumption will increase significantly
Modern electronic devices are constantly evolving in the direction of lightness and miniaturization, so the volume of the battery 109 will be greatly limited, and the storage energy will also be reduced, which will lead to the problem of insufficient battery life of optical navigation devices such as optical mice.
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[0023] Certain terms are used throughout the specification and following claims to refer to particular elements. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same element. The description and the preceding claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and the preceding claims is an open-ended term, so it should be interpreted as "including but not limited to".
[0024] The schematic diagram of the tracking action of the optical navigation device disclosed in the present invention will be described in detail below. It should be noted that the following description starts with figure 1 The optical mouse 100 shown is illustrated as an example, but does not mean that the disclosed content of the present invention can only be obtained through f...
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The invention discloses an optical navigation device, comprising: a light source, used to illuminate a surface to form an image; an image sensor, used to capture a frame in the image; and a controller, based on the first frame in the frame and the location The second frame after the first frame is used to calculate the first estimated speed of the optical navigation device and to define the first frame group, the first frame group includes a plurality of frames with the second frame, and according to the first frame group An estimated speed controls the parameters of the first frame group to process all the frames in the first frame group, wherein the parameters of the first frame group include: the light source does not illuminate the frames in the first frame group non-illumination frequency, and at least one of the following parameters: the non-capture frequency at which the image sensor does not capture frames in the first frame group, and the controller calculates the frequency of frames captured by the image sensor in the first frame group Calculate the frequency and search range for the frames in the first frame group.
Description
technical field [0001] The present invention relates to an optical navigation device and an optical navigation method, in particular to an optical navigation device and an optical navigation method that can estimate the moving speed of the optical navigation device and adjust the lighting frequency accordingly. Background technique [0002] The optical navigation device in the prior art first illuminates a surface with a light source to form an image, and then uses an image sensor to capture frames in the image, and calculates each frame in the image one by one to calculate The speed of movement of the optical navigation device is used to perform tracking. [0003] see figure 1 , which shows an optical mouse 100 in the prior art, which is a kind of optical navigation device. Such as figure 1 As shown, the optical mouse 100 includes a light source 101 , a controller 103 , and an image sensor 105 . The light source 101 , the controller 103 , and the image sensor 105 are joi...
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IPC IPC(8): G06F3/0354
Inventor 陈之悠吴志彦
Owner PIXART IMAGING INC