CN102023755B - Method and device for removing image noise of electronic equipment - Google Patents
Method and device for removing image noise of electronic equipment Download PDFInfo
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- CN102023755B CN102023755B CN 200910092986 CN200910092986A CN102023755B CN 102023755 B CN102023755 B CN 102023755B CN 200910092986 CN200910092986 CN 200910092986 CN 200910092986 A CN200910092986 A CN 200910092986A CN 102023755 B CN102023755 B CN 102023755B
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Abstract
The invention provides a method for removing image noise of electronic equipment. The method comprises the following steps of: controlling an optical unit by first clock frequency to generate a first optical effect in a predetermined clock period, and capturing a first image in other clock periods except the predetermined clock period by an image acquisition unit, wherein the first image comprises noise; controlling the image acquisition unit by second clock frequency to ensure that a camera captures a second image in the predetermined clock, wherein the second image comprises a second optical effect image and noise image, each clock period of the image acquisition unit and a predetermined number of the clock periods of the optical unit are synchronized, the second clock frequency is less than or equal to the first clock frequency; and acquiring an image from which noise is removed according to the first image and the second image. The invention also provides electronic equipment for removing the image noise. The technical scheme avoids the interference of external rays and improves resolution ratio.
Description
Technical field
The present invention relates to electronic device field, relate in particular to a kind of method and device thereof of eliminating the picture noise of electronic equipment.
Background technology
At present, touching technique has obtained more general application, for example, adopts LED to illuminate screen area, and when finger touched screen, the reflective of finger caught by camera, and this reflective image is used for locating the position of finger.After but the outer light of screen enters into camera, can produce very big interference, cause systemic resolution to reduce the detection of finger.
In existing a solution, increase frame at screen edge, the acquisition range of camera is positioned in the screen frame, the purpose of this scheme is that the outer light of screen can not captured by camera.
The shortcoming of this scheme is: under the imperfect situation of the absorptive of frame, the outer light of screen can enter into through the reflection of frame in the visibility region scope of camera, thereby is captured and cause interference by camera.
Therefore, need a kind of method that reduces or eliminate background light interference in the optical touch system.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of reduce since in the environment interference of background light source for the dysgenic method that image caused of recognizing touch operation thing.
According to an aspect of the present invention, a kind of method of eliminating the picture noise of electronic equipment is provided, said electronic equipment has a physical surface, and comprises: optical unit, be arranged on the said physical surface, and be used to produce first optical effect; Image acquisition units is arranged on the said physical surface, and the visual range of said image acquisition units and said optical unit all can cover the touch area fully; Said image acquisition units is used to catch the image of said first optical effect, the image of second optical effect; And the image when not producing said first optical effect and said second optical effect; Wherein, the image of said second optical effect is on said first optical effect, to form after the operating body that is used to operate said electronic equipment gets into said touch operation zone; And processing unit, be connected with said image acquisition units, be used for image according to said second optical effect, confirm the scope of said operating body in said touch operation zone;
This method may further comprise the steps: with the said optical unit of first clock frequency control; Make said optical unit in the predetermined clock period, produce first optical effect; In the said predetermined clock period in addition clock period, make said image acquisition units catch first image, said first image is to comprise noisy image; With the said image acquisition units of second clock frequency control; Make in said predetermined clock; Said camera captures second image, and said second image packets contains the image of said second optical effect and the image of noise, wherein; Each clock period of said image acquisition units is synchronized with the clock period of the predetermined quantity of said optical unit, and wherein said second clock frequency is smaller or equal to said first clock frequency; And according to said first image and said second image, the image of the noise that has been eliminated.
Preferably, the K that said first clock frequency is said second clock frequency times, wherein K is the integer more than or equal to 1.
Preferably, said image acquisition units is a camera, and said optical unit is a led array; Said led array is total in K clock period not luminous to i * K (n+1)+K at its i * K (n+1)+1, in remaining cycle, said led array is luminous; Said camera is gathered said first image at its i * (n+1)+1 in the clock period; Wherein, K is the integer more than or equal to 1, and i, n are the integer more than or equal to 0.
Preferably, said second clock frequency equals the frame frequency of said image acquisition units.
Preferably, said optical unit comprises: first light source, be arranged on a side of said physical plane, and be used to shine said physical plane; Said image acquisition units comprises: first camera and second camera are separately positioned on the place, two summits with the identical or relative side of said first light source; Wherein, the light that sends of said first light source and the visual range of first camera and second camera all can cover the touch area fully; Said first camera and second camera are used to gather owing to the operating body reflection that gets into said touch operation zone or stop the image that said first source light forms.
Preferably, said optical unit comprises: first light source and secondary light source, and two summits that are separately positioned on said physical plane are located, and are used to shine said physical plane; Said image acquisition units comprises: first camera and second camera are separately positioned on and said first light source and the identical or different place, two summits of secondary light source; Wherein, the light that sends of said first light source and secondary light source and the visual range of first camera and second camera all can cover the touch area fully; Said first camera and second camera are used to gather owing to the operating body reflection that gets into said touch operation zone or stop the image that said first source light forms.
Preferably, said optical unit comprises: first light source, and a summit that is arranged on said physical plane is located, and is used to shine said physical plane; Said image acquisition units comprises: first camera is arranged on the place, a summit with the identical or different said physical surface of said first light source; Wherein, the light and the first camera visual range that send of said first light source all can cover the touch area fully; Said first camera is used to be captured on the said touch operation zone owing to the reflection of touch operation body or stops the image that said first source light forms.
Wherein, said first optical effect is to see from said image acquisition units, the effect that said optical unit comes out light emission; Said second optical effect is to see from collecting unit, after said operating body gets into said touch operation zone back reflection or stops said light, thereby in said optically detecting unit, forms the effect of image.
Wherein, optical unit is arranged on the said physical surface, is used to produce first optical effect; Image acquisition units is arranged on the said physical surface, and the visual range of said image acquisition units and said optical unit all can cover the touch area fully; Said image acquisition units is used to catch the image of said first optical effect, the image of second optical effect; And the image when not producing said first optical effect and said second optical effect; Wherein, the image of said second optical effect is on said first optical effect, to form after the operating body that is used to operate said electronic equipment gets into said touch operation zone; And processing unit, be connected with said image acquisition units, be used for image according to said second optical effect, confirm the scope of said operating body in said touch operation zone;
Wherein, This electronic equipment comprises: first clock control module; Be used for the said optical unit of first clock frequency control; Make said optical unit in the predetermined clock period, produce first optical effect, in the said predetermined clock period in addition clock period, make said image acquisition units catch first image, said first image is to comprise noisy image; The second clock control module; Be used for the said image acquisition units of second clock frequency control, make that said camera captures second image in said predetermined clock; Said second image packets contains the image of said second optical effect and the image of noise; Wherein, each clock period of said image acquisition units is synchronized with the clock period of the predetermined quantity of said optical unit, and wherein said second clock frequency is smaller or equal to said first clock frequency; And noise cancellation module, be arranged in said processing unit, be used for according to said first image and said second image, the image of the noise that has been eliminated.
Preferably, said image acquisition units is a camera, and said optical unit is a led array; Said led array is total in K clock period not luminous to i * K (n+1)+K at its i * K (n+1)+1, in remaining cycle, said led array is luminous; Said camera is gathered said first image at its i * (n+1)+1 in the clock period; Wherein, K is the integer more than or equal to 1, and i, n are the integer more than or equal to 0.
Realized following technique effect through technical scheme of the present invention: overcome the interference problem of extraneous light, improved the resolution of system.
Be noted that above explanation and following detailed description all are exemplary, being intended to provides further explanation to desired the present invention.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.Below with reference to accompanying drawings, other purpose, characteristic and effect of invention done further detailed explanation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the touch screen structure synoptic diagram in a kind of electronic equipment;
Fig. 2 is an optical touch system structural representation in a kind of electronic equipment;
Fig. 3 is a finger imaging synoptic diagram under the optical touch system perfect condition in the electronic equipment according to an embodiment of the invention;
Fig. 4 be according to an embodiment of the invention in the electronic equipment optical touch system have finger imaging synoptic diagram under the external interference light status;
Fig. 5 is a method flow diagram of eliminating the picture noise of electronic equipment according to an embodiment of the invention;
Fig. 6 is the clock sequence synoptic diagram of optical touch system in the electronic equipment according to an embodiment of the invention;
Fig. 7 is the image synoptic diagram of optical touch system ground unrest in the electronic equipment according to an embodiment of the invention; And
Fig. 8 is an electronic equipment synoptic diagram according to an embodiment of the invention.
Embodiment
To the defective of the problems referred to above and existing solution, the background interference problem that following scheme solves touch-screen is proposed among the present invention.
Core concept of the present invention is: the clock frequency of control LED and camera; Make LED in non-luminous cycle and LED collect first image (ground unrest image) and second image respectively in luminous cycle; With the second figure image subtraction, first image, obtain the not image of noisy.
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Fig. 1 is a kind of touch screen structure and principle of work synoptic diagram of electronic installation;
As shown in the figure, a side of touch-screen is provided with row's led array, and place, two summits is provided with a camera respectively about touch-screen.
When finger touch was to touch-screen, finger can be blocked the transmission of light, and part light can be reflected.Two cameras can capture the reflective of finger, form the image of said finger, and utilize the triangle location Calculation to go out the actual position of finger.
Fig. 2 is an optical touch system structural representation in the electronic equipment according to an embodiment of the invention;
Like Fig. 2; Optical touch system structure in the electronic equipment has been shown among the figure according to an embodiment of the invention: the left and right corner at screen is settled light source and camera; Adopt the light source screen that throws light on; When touch objects touch screen surface, touch objects can be blocked the transmission of light, and part light can be reflected.Two cameras can capture the reflective of touch objects, and utilize the triangle location Calculation to go out the actual position of touch objects.Below more specify.
As shown in Figure 2, this optical touch system comprises two light sources 204, is arranged at the upper left corner and the upper right corner of physical surface 208 respectively, is used to launch light, shines said physical surface surface; Two cameras 206 are separately positioned on the upper left corner and the upper right corner of physical surface 208, respectively towards physical surface, are used to gather the light of the operating body reflection in the touch operation zone that gets into physical surface, thereby in camera, form the image of operating body; Processor 202 links to each other with camera, is used for utilizing the triangle location Calculation to go out the actual position of touch objects according to two images that camera became.Baffle plate 210 is arranged on the both sides of physical surface, is used to stop the light of light source, prevents outside its Petting Area that shines physical surface.
The concrete principle of work of this system is following: use the light source irradiation physical surface, and when the operation object, touch objects for example, when touching the physical surface surface, touch objects can stop the transmission of the light of light emitted, part light can be reflected.Two cameras can capture the light of touch objects reflection, thereby in camera, form the image of touch objects.Camera links to each other with processor, gives processor with image transfer, and processor utilizes the triangle location Calculation to go out the actual position of touch objects according to two images that become in the distance between two cameras and two cameras.Through baffle plate is set, can prevent that irradiate light from arriving outside the Petting Area of physical surface.
The embodiment that adopts two cameras of two light sources and light source and camera to be set together has been shown among this figure; But in fact; Can adopt other set-up mode as required, for example camera and light source branch are arranged, utilize reflected light or the light that stops is surveyed.Even can adopt camera of a light source.For example,, be arranged on the place, a summit of physical plane, be used to shine physical plane light source; First camera is arranged on the place, a summit with the identical or different physical surface of first light source; Wherein, the visual range of first light source and first camera all can cover the touch area fully; First camera is used to be captured on the touch operation zone owing to the reflection of touch operation body or stops the image that first source light forms.
Fig. 3 is a finger imaging synoptic diagram under the optical touch system perfect condition in the electronic equipment according to an embodiment of the invention;
As shown in the figure, the finger among Fig. 1 forms images in camera, and black part is divided into the frame of touch-screen among the figure, and white ovals shape is reflective for finger, and two ellipses among the figure are represented reflective by the viewed finger of left and right sides camera respectively.This image is not for comprising the situation imaging of noise.Can have extraneous stray light in the reality unavoidably, can cause being difficult to when serious accurately judging is the image of touch objects or the image of external interference, thereby influences the normal operation of system.
Fig. 4 be according to an embodiment of the invention in the electronic equipment optical touch system have finger imaging synoptic diagram under the external interference light status;
As shown in the figure, the finger that arrived by left and right sides camera collection respectively of two images reflective up and down among the figure, and external interference light is reflective, and wherein, the reflective scope of noise is very big, and brightness is very high, has had a strong impact on the resolution of camera to touch objects.
Fig. 5 is a method flow diagram of eliminating the picture noise of electronic equipment according to an embodiment of the invention;
In this method, mainly comprise:
1) clock frequency that makes LED more than or equal to for the clock frequency of camera (clock frequency that for example can make LED be camera clock frequency K doubly; Wherein K is the integer more than or equal to 1), and make clock period of camera be synchronized with the clock period of the predetermined quantity of LED;
2) in certain or some cycles, make LED not luminous; And, make LED luminous in other cycles;
3) in non-luminous cycle of LED, the image that camera captures is image as a setting; According to the background image (for example the two being subtracted each other) that the LED image that camera captures in the luminous cycle and LED captured in non-luminous cycle, the image of the background interference that has been eliminated.
Followingly more describe technical scheme of the present invention in detail according to specific embodiment.
Eliminate the method for the picture noise of electronic equipment according to an embodiment of the invention, said electronic equipment has a physical surface, and comprises: optical unit, be arranged on the said physical surface, and be used to produce first optical effect; Image acquisition units is arranged on the said physical surface, and the visual range of said image acquisition units and said optical unit all can cover the touch area fully; Said image acquisition units is used to catch the image of said first optical effect, the image of second optical effect; And the image when not producing said first optical effect and said second optical effect; Wherein, the image of said second optical effect is on said first optical effect, to form after the operating body that is used to operate said electronic equipment gets into said touch operation zone; And processing unit, be connected with said image acquisition units, be used for image according to said second optical effect, confirm the scope of said operating body in said touch operation zone;
This method may further comprise the steps: with the said optical unit of first clock frequency control; Make said optical unit in the predetermined clock period, produce first optical effect; Make said image acquisition units catch first image in clock period beyond said predetermined clock period, said first image is to comprise noisy image (this first image is the image when not producing first optical effect and second optical effect); With the said image acquisition units of second clock frequency control; Make in said predetermined clock; Said camera captures second image, and said second image packets contains the image of said second optical effect and the image of noise, wherein; Each clock period of said image acquisition units is synchronized with the clock period of the predetermined quantity of said optical unit, and wherein said second clock frequency is more than or equal to said first clock frequency; And according to said first image and said second image, the image of the noise that has been eliminated.
Preferably, with said first image of the said second figure image subtraction, the image of the noise that has been eliminated.
Preferably, the K that said second clock frequency is said first clock frequency times, wherein K is the integer more than or equal to 1.
Preferably, said image acquisition units is a camera, and said optical unit is a led array; Said led array is total in K clock period not luminous to i * K (n+1)+K at its i * K (n+1)+1, in remaining cycle, said led array is luminous; Said camera is gathered said first image at its i * (n+1)+1 in the clock period; Wherein, K is the integer more than or equal to 1, and i, n are the integer more than or equal to 0.
Preferably, said second clock frequency equals the frame frequency of said image acquisition units.
Preferably, said optical unit comprises: first light source, be arranged on a side of said physical plane, and be used to shine said physical plane; Said image acquisition units comprises: first camera and second camera are separately positioned on the place, two summits with the identical or relative side of said first light source; Wherein, the light that sends of said first light source and the visual range of first camera and second camera all can cover the touch area fully; Said first camera and second camera are used to gather owing to the operating body reflection that gets into said touch operation zone or stop the image that said first source light forms.
Preferably, said optical unit comprises: first light source and secondary light source, and two summits that are separately positioned on said physical plane are located, and are used to shine said physical plane; Said image acquisition units comprises: first camera and second camera are separately positioned on and said first light source and the identical or different place, two summits of secondary light source; Wherein, the light that sends of said first light source and secondary light source and the visual range of first camera and second camera all can cover the touch area fully; Said first camera and second camera are used to gather owing to the operating body reflection that gets into said touch operation zone or stop the image that said first source light forms.
Preferably, said optical unit comprises: first light source, and a summit that is arranged on said physical plane is located, and is used to shine said physical plane; Said image acquisition units comprises: first camera is arranged on the place, a summit with the identical or different said physical surface of said first light source; Wherein, the light and the first camera visual range that send of said first light source all can cover the touch area fully; Said first camera is used to be captured on the said touch operation zone owing to the reflection of touch operation body or stops the image that said first source light forms.
Wherein, said first optical effect is to see from said image acquisition units, the effect that said optical unit comes out light emission; Said second optical effect is to see from collecting unit, after said operating body gets into said touch operation zone back reflection or stops said light, thereby in said optically detecting unit, forms the effect of image.
Fig. 6 is the clock sequence synoptic diagram of optical touch system in the electronic equipment according to an embodiment of the invention;
As scheme visiblely, the clock frequency of camera and the frequency of LED have been shown among the figure, camera the 1st, (n+1)+1 gathers background image constantly, this moment, Led was non-luminous.
The image of camera collection comprises the image of background image and finger in all the other cycles.
Corresponding with the frequency of camera, in the cycle of camera collection background image, promptly 1 of LED arrive K, in the cycle, LED is not luminous to K (n+1)+K for K (n+1)+1, and LED is luminous in all the other cycles.
And can find out that each clock of camera is with K the clock synchronization of LED.
Fig. 7 is the image synoptic diagram of the ground unrest that optical touch system is gathered in the electronic equipment according to an embodiment of the invention.
Image among this figure is the image that is collected under the non-luminous situation of LED.With can the be eliminated image of ground unrest of the image among Fig. 4 and this image subtraction.
Through above-mentioned processing, can eliminate light or the reflective influence of chaff interference of finger beyond sending out reflective well, thereby improve the accuracy of touch greatly.
Fig. 8 is an electronic equipment synoptic diagram according to an embodiment of the invention.
Electronic equipment according to an embodiment of the invention, said electronic equipment has a physical surface, and comprises: optical unit 802, be arranged on the said physical surface, be used to produce first optical effect; Image acquisition units 804 is arranged on the said physical surface, and the visual range of said image acquisition units and said optical unit all can cover the touch area fully; Said image acquisition units is used to catch the image of said first optical effect, the image of second optical effect; And the image when not producing said first optical effect and said second optical effect; Wherein, the image of said second optical effect is on said first optical effect, to form after the operating body that is used to operate said electronic equipment gets into said touch operation zone; And processing unit 810, be connected with said image acquisition units, be used for image according to said second optical effect, confirm the scope of said operating body in said touch operation zone;
This electronic equipment also comprises:
First clock control module 806; Be used for the said optical unit of first clock frequency control; Make said optical unit in the predetermined clock period, produce first optical effect; In the said predetermined clock period in addition clock period, make said image acquisition units catch first image, said first image is to comprise noisy image;
Second clock control module 808; Be used for the said image acquisition units of second clock frequency control, make that said camera captures second image in said predetermined clock; Said second image packets contains the image of said second optical effect and the image of noise; Wherein, each clock period of said image acquisition units is synchronized with the clock period of the predetermined quantity of said optical unit, and wherein said second clock frequency is more than or equal to said first clock frequency; And
Noise cancellation module 810-2 is arranged in processing unit, is used for according to said first image and said second image, the image of the noise that has been eliminated.
Preferably, said image acquisition units is a camera, and said optical unit is a led array; Said led array is total in K clock period not luminous to i * K (n+1)+K at its i * K (n+1)+1, in remaining cycle, said led array is luminous; Said camera is gathered said first image at its i * (n+1)+1 in the clock period; Wherein, K is the integer more than or equal to 1, and i, n are the integer more than or equal to 0.
Be that example is described with the touch-screen in the foregoing description; Obviously, this electronic equipment is not limited only to computing machine, but can be televisor, computer keyboard, mobile device; On equipment such as notebook, all-in-one display screen, perhaps we can say any electronic equipment with physical plane.
Realized following technique effect through technical scheme of the present invention:
1, can reduce the influence of ground unrest, improved the signal to noise ratio (S/N ratio) of system, improve the performance of touch-screen;
2, scheme is simple, and cost is low, realizes easily.
More than be merely embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. method of eliminating the picture noise of electronic equipment, said electronic equipment has a physical surface, and comprises:
Optical unit is arranged on the said physical surface, is used to produce first optical effect;
Image acquisition units is arranged on the said physical surface, and the visual range of said image acquisition units and said optical unit all can cover the touch operation zone fully; Said image acquisition units is used to catch the image of said first optical effect, the image of second optical effect; And the image when not producing said first optical effect and said second optical effect; Wherein, the image of said second optical effect is on said first optical effect, to form after the operating body that is used to operate said electronic equipment gets into said touch operation zone; And
Processing unit is connected with said image acquisition units, is used for the image according to said second optical effect, confirms the scope of said operating body in said touch operation zone;
It is characterized in that this method may further comprise the steps:
With the said optical unit of first clock frequency control; Make said optical unit in the predetermined clock period, produce first optical effect; In the said predetermined clock period in addition clock period, make said image acquisition units catch first image, said first image is to comprise noisy image;
With the said image acquisition units of second clock frequency control; Make in said predetermined clock; Said image acquisition units captures second image, and said second image packets contains the image of said second optical effect and the image of noise, wherein; Each clock period of said image acquisition units is synchronized with the clock period of the predetermined quantity of said optical unit, and wherein said second clock frequency is smaller or equal to said first clock frequency; And
According to said first image and said second image, the image of the noise that has been eliminated.
2. the method for the picture noise of elimination electronic equipment according to claim 1 is characterized in that:
The K that said first clock frequency is said second clock frequency times, wherein K is the integer more than or equal to 1.
3. the method for the picture noise of elimination electronic equipment according to claim 1 is characterized in that:
Said image acquisition units is a camera, and said optical unit is a led array;
Said led array is total in K clock period not luminous to i * K (n+1)+K at its i * K (n+1)+1, in remaining cycle, said led array is luminous;
Said camera is gathered said first image at its i * (n+1)+1 in the clock period;
Wherein, K is the integer more than or equal to 1, and i, n are the integer more than or equal to 0.
4. the method for the picture noise of elimination electronic equipment according to claim 1 is characterized in that:
Said second clock frequency equals the frame frequency of said image acquisition units.
5. method according to claim 1 is characterized in that:
Said optical unit comprises: first light source, be arranged on a side of said physical plane, and be used to shine said physical plane;
Said image acquisition units comprises: first camera and second camera are separately positioned on the place, two summits with the identical or relative side of said first light source;
Wherein, the light that sends of said first light source and the visual range of first camera and second camera all can cover the touch operation zone fully;
Said first camera and second camera are used to gather owing to the operating body reflection that gets into said touch operation zone or stop the image that said first source light forms.
6. method according to claim 1 is characterized in that:
Said optical unit comprises: first light source and secondary light source, and two summits that are separately positioned on said physical plane are located, and are used to shine said physical plane;
Said image acquisition units comprises: first camera and second camera are separately positioned on and said first light source and the identical or different place, two summits of secondary light source;
Wherein, the light that sends of said first light source and secondary light source and the visual range of first camera and second camera all can cover the touch operation zone fully;
Said first camera and second camera are used to gather owing to the operating body reflection that gets into said touch operation zone or stop the image that said first source light forms.
7. method according to claim 1 is characterized in that:
Said optical unit comprises: first light source, and a summit that is arranged on said physical plane is located, and is used to shine said physical plane;
Said image acquisition units comprises: first camera is arranged on the place, a summit with the identical or different said physical surface of said first light source;
Wherein, the light and the first camera visual range that send of said first light source all can cover the touch operation zone fully;
Said first camera is used to be captured on the said touch operation zone owing to the reflection of touch operation body or stops the image that said first source light forms.
8. according to each described method in the aforementioned claim, it is characterized in that:
Said first optical effect is to see from said image acquisition units, the effect that said optical unit comes out light emission; Said second optical effect is to see from said image acquisition units, after said operating body gets into said touch operation zone back reflection or stops said light, thereby in said image acquisition units, forms the effect of image.
9. the electronic equipment of a removal of images noise, said electronic equipment has a physical surface, and comprises:
Optical unit is arranged on the said physical surface, is used to produce first optical effect;
Image acquisition units is arranged on the said physical surface, and the visual range of said image acquisition units and said optical unit all can cover the touch operation zone fully; Said image acquisition units is used to catch the image of said first optical effect, the image of second optical effect; And the image when not producing said first optical effect and said second optical effect; Wherein, the image of said second optical effect is on said first optical effect, to form after the operating body that is used to operate said electronic equipment gets into said touch operation zone; And
Processing unit is connected with said image acquisition units, is used for the image according to said second optical effect, confirms the scope of said operating body in said touch operation zone;
It is characterized in that this electronic equipment comprises:
First clock control module; Be used for the said optical unit of first clock frequency control; Make said optical unit in the predetermined clock period, produce first optical effect; In the said predetermined clock period in addition clock period, make said image acquisition units catch first image, said first image is to comprise noisy image;
The second clock control module; Be used for the said image acquisition units of second clock frequency control, make that said image acquisition units captures second image in said predetermined clock; Said second image packets contains the image of said second optical effect and the image of noise; Wherein, each clock period of said image acquisition units is synchronized with the clock period of the predetermined quantity of said optical unit, and wherein said second clock frequency is smaller or equal to said first clock frequency; And
Noise cancellation module is arranged in said processing unit, is used for according to said first image and said second image, the image of the noise that has been eliminated.
10. the electronic equipment of removal of images noise according to claim 9 is characterized in that:
Said image acquisition units is a camera, and said optical unit is a led array;
Said led array is total in K clock period not luminous to i * K (n+1)+K at its i * K (n+1)+1, in remaining cycle, said led array is luminous;
Said camera is gathered said first image at its i * (n+1)+1 in the clock period;
Wherein, K is the integer more than or equal to 1, and i, n are the integer more than or equal to 0.
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| CN 200910092986 CN102023755B (en) | 2009-09-21 | 2009-09-21 | Method and device for removing image noise of electronic equipment |
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| CN 200910092986 CN102023755B (en) | 2009-09-21 | 2009-09-21 | Method and device for removing image noise of electronic equipment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118083A (en) * | 1995-05-19 | 1996-03-06 | 珠海科健实业有限公司 | Infrared touch screen photoelectric detecting and positioning system |
| CN101359266A (en) * | 2008-09-11 | 2009-02-04 | 成都吉锐触摸技术股份有限公司 | Method for decreasing response time of circuit with resistance to light interference for infrared touch screen |
-
2009
- 2009-09-21 CN CN 200910092986 patent/CN102023755B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118083A (en) * | 1995-05-19 | 1996-03-06 | 珠海科健实业有限公司 | Infrared touch screen photoelectric detecting and positioning system |
| CN101359266A (en) * | 2008-09-11 | 2009-02-04 | 成都吉锐触摸技术股份有限公司 | Method for decreasing response time of circuit with resistance to light interference for infrared touch screen |
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