Infrared pair tube touch screen AGC (automatic gain control) adjusting method and system
A technology of infrared alignment and adjustment method, which is applied in the field of educational interactive smart tablet, can solve the problems of abnormal touch of the tablet, user inconvenience, and the tablet cannot realize the touch function, etc., and achieves the effect of eliminating the problem of abnormal instantaneous touch.
Active Publication Date: 2016-02-17
GUANGZHOU SHIRUI ELECTRONICS
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Problems solved by technology
The specific method is: when the educational interactive smart blackboard is used in the classroom, the teacher closes the blackboard on the front of the tablet without turning off the whole machine after class. Since the back of the blackboard has a high reflectivity to infrared light, the existing reflection will cause the ADC in the tablet to (that is, the A / D converter) signal is too high, and in this case the AGC will automatically adjust to lower the ADC signal; after that, when the blackboard is turned on next time, the ADC signal is too low even if the panel is in a normal environment, resulting in Instantaneous touch abnormality occurs on the tablet
Although in this case, AGC will automatically adjust to make the ADC increase to a suitable value, but it will take some time for the AGC to automatically adjust until the ADC recovers to an appropriate level. During this period, the tablet will not be able to realize the touch function, which will cause inconvenience to users.
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[0053] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0054] The embodiments provided by the present invention include the embodiment of the AGC adjustment method of the infrared paired tube touch screen, and also include the corresponding embodiment of the AGC adjustment system of the infrared paired tube touch screen. Each will be described in detail below.
[0055] figure 1 It i...
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The invention relates to an infrared pair tube touch screen AGC (automatic gain control) adjusting method and system. the method comprises the steps of acquiring the light value of a surrounding environment of a touch screen to obtain the change condition of the light value of the surrounding environment of the touch screen; judging a touch screen sheltering event and a touch screen sheltering removing event according to the change condition of the light value; setting the touch screen AGC into a lock state if the touch screen sheltering event is monitored; setting the touch screen AGC into an unlock state if the touch screen sheltering removing event is monitored. Through the infrared pair tube touch screen AGC adjusting method and system, the abnormal problem of instant touch when the touch screen sheltering is removed is solved.
Description
technical field [0001] The invention relates to the technical field of educational interactive intelligent flat panels, in particular to an AGC adjustment method and system for an infrared paired tube touch screen. Background technique [0002] Taking the educational interactive smart panel as an example, the AGC (automatic gain control, automatic gain control) of the existing infrared pair tube touch screen will be adjusted in real time during use. The specific method is: when the educational interactive smart blackboard is used in the classroom, the teacher closes the blackboard on the front of the tablet without turning off the whole machine after class. Since the back of the blackboard has a high reflectivity to infrared light, the existing reflection will cause the ADC in the tablet to (that is, the A / D converter) signal is too high, and in this case the AGC will automatically adjust to lower the ADC signal; after that, when the blackboard is turned on next time, the AD...
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IPC IPC(8): G06F3/042G06F3/041
CPCG06F3/0416G06F3/0421G06F2203/04109G06F3/042
Inventor 魏洋洋张维元侯旻翔胡隽鹏
Owner GUANGZHOU SHIRUI ELECTRONICS