CN202261561U - Automatic focusing system - Google Patents
Automatic focusing system Download PDFInfo
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- CN202261561U CN202261561U CN2011203301568U CN201120330156U CN202261561U CN 202261561 U CN202261561 U CN 202261561U CN 2011203301568 U CN2011203301568 U CN 2011203301568U CN 201120330156 U CN201120330156 U CN 201120330156U CN 202261561 U CN202261561 U CN 202261561U
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- ccd sensor
- acquisition module
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Abstract
The utility model discloses an automatic focusing system, comprising a camera lens module, an image display screen, a CCD (Charge Coupled Device) sensor and a focusing driving module, wherein the camera lens module is respectively connected with the focusing driving module and the CCD sensor and the CCD sensor is connected with the image display screen. The system further comprises a video synchronous separation module, an AD (Analog to Digital) acquisition module and a control module, wherein the CCD sensor is connected with the video synchronous separation module and the video synchronous separation module is respectively connected with the AD acquisition module and the control module; the AD acquisition module is connected with the control module and the control module is connected with the focusing driving module. The automatic focusing system has the advantages that: the structure of the circuit is simple, the cost is low, the focusing speed is fast and the focusing accuracy is high.
Description
Technical field
The utility model relates to a kind of focusing system, especially relates to a kind of autofocus system.
Background technology
Traditional autofocus system is divided into two types of active autofocus system and passive type autofocus systems: active automatic focus is the distance of utilizing emission infrared ray or ultrasonic wave to measure object; Autofocus system drives the camera adjusting image distance according to the range data that is obtained, thereby accomplishes automatic focus; Passive type automatic focus is through the light of acceptance from object, and the mode of survey or phase difference detection of looking with electronics is accomplished automatic focus; Traditional focusing system generally all is to realize automatic focus through the distance of measuring between camera lens and the object, and image data is single, and focusing speed is slow and focusing accuracy is not high, and photographic images is fuzzy; Traditional in addition focusing system comprises the automatic detection of signal and adjusts two parts automatically that circuit structure is complicated, the cost height.
Summary of the invention
It is simple that the utility model technical problem to be solved provides a kind of circuit structure, and cost is low, and focusing speed is fast and focus on autofocus system accurately.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of autofocus system; Comprise camera lens module, image display panel, ccd sensor and focusing driver module; Described camera lens module is connected with described ccd sensor with described focusing driver module respectively; Described ccd sensor is connected with described image display panel; Also comprise audio video synchronization separation module, AD acquisition module and control module, described ccd sensor is connected with described audio video synchronization separation module, and described audio video synchronization separation module is connected with described control module with described AD acquisition module respectively; Described AD acquisition module is connected with described control module, and described control module is connected with described focusing driver module.
Described control module is mainly by forming based on the integrated chip and the peripheral cell of Cortex-M0 kernel.
Described audio video synchronization separation module is that integrated chip and the peripheral cell of LM1881 formed by model mainly.
Described AD acquisition module is that integrated chip and the peripheral cell of ADS828 formed by model mainly.
Compared with prior art, the utility model has the advantages that: isolate line synchronizing signal through the audio video synchronization separation module, parity field synchronizing signal and field sync signal; Be transferred to AD acquisition module and control module respectively, control module drives the AD acquisition module, and the AD acquisition module is given control module with the transfer of data of gathering; Control module outputs a control signal to the focusing driver module, focuses on driver module and drives camera lens module, the adjustment focal position; Not only circuit structure is simple; Cost is low, and the combination of AD acquisition module and control module enriched counting of image video signal collection, has improved focusing speed and focusing accuracy.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model;
Fig. 2 is the AD acquisition module of the utility model and the circuit diagram of control module;
Fig. 3 is the circuit diagram of the focusing driver module of the utility model.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1; A kind of autofocus system comprises camera lens module 1, image display panel 3, ccd sensor 2 and focuses on driver module 6 that camera lens module 1 is connected with ccd sensor 2 with focusing driver module 6 respectively; Ccd sensor 2 is connected with image display panel 3; Native system also comprises audio video synchronization separation module 4, AD acquisition module 5 and control module 7, and ccd sensor 2 is connected with audio video synchronization separation module 4, and audio video synchronization separation module 4 is connected with control module 7 with AD acquisition module 5 respectively; AD acquisition module 5 is connected with control module 7, and control module 7 is connected with focusing driver module 6.
In the above-mentioned specific embodiment; Camera lens module 1 is 10 times of all-in-one camera lenses; Image display panel 3 is the white and black displays screen, and ccd sensor 2 can use the matured product of this area, and control module 7 is that integrated chip and the peripheral cell of LPC1114 formed by the model based on Cortex-M0 kernel mainly; Audio video synchronization separation module 4 is that integrated chip and the peripheral cell of LM1881 formed by model mainly, and AD acquisition module 5 is main to be that integrated chip and the peripheral cell of ADS828 formed by model.
Below in conjunction with Fig. 1 ~ Fig. 3 the operation principle of the utility model is specifically introduced as follows: camera lens module 1 is taken in the external image signal; But picture signal is converted into the signal of telecommunication of digital processing through ccd sensor 2; The signal of telecommunication one road after the conversion is delivered to image display panel 3 and is shown; Judge foundation the most intuitively with this as focusing effect; Audio video synchronization separation module 4 is delivered on another road; LM1881 chip in the audio video synchronization separation module 4 is isolated line synchronizing signal, parity field synchronizing signal and field sync signal; And these signals are transferred to AD acquisition module 5 and control module 7 respectively; Nine parallel input/output terminals of the ADS828 chip in the AD acquisition module 5 (bit0-bit9 end) respectively with control module 7 in the parallel input and output IO end of nine of LPC1114 chip (PIO0_0 ~ PIO0_9 end) is connected, the enable signal end (OE) of ADS828 chip holds (PIO0_10) to be connected with the tenth parallel input and output IO of LPC1114 chip, the 11 parallel input and output IO of clock signal terminal of ADS828 chip (CLK) and LPC1114 chip DE holds (PIO0_11) to be connected; The PA+ end that the signal output part of LPC1114 chip focuses on driver module 6 is connected with the PA-end, and the A+ end that focuses on driver module 6 is connected with camera lens module 1 with the A-end; When control module 7 successively receives audio video synchronization separation module 4 isolated strange field sync signals (rising edge triggering) and line synchronizing signal (rising edge triggering); Will be at the PIO0.10 of LPC1114 chip end output high level; Drive AD acquisition module 5; AD acquisition module 5 carries out image data acquiring, and the image data transmission of collection is in the LPC1114 chip, and control module 7 output control signal corresponding are to focusing on driver module 6; Focus on driver module 6 and drive camera lens module 1, carry out automatic focus.
Claims (4)
1. autofocus system; Comprise camera lens module, image display panel, ccd sensor and focusing driver module; Described camera lens module is connected with described ccd sensor with described focusing driver module respectively; Described ccd sensor is connected with described image display panel; It is characterized in that also comprising audio video synchronization separation module, AD acquisition module and control module, described ccd sensor is connected with described audio video synchronization separation module, and described audio video synchronization separation module is connected with described control module with described AD acquisition module respectively; Described AD acquisition module is connected with described control module, and described control module is connected with described focusing driver module.
2. a kind of autofocus system according to claim 1 is characterized in that described control module is mainly by forming based on the integrated chip and the peripheral cell of Cortex-M0 kernel.
3. a kind of autofocus system according to claim 1 is characterized in that described audio video synchronization separation module is that integrated chip and the peripheral cell of LM1881 formed by model mainly.
4. a kind of autofocus system according to claim 1 is characterized in that described AD acquisition module is that integrated chip and the peripheral cell of ADS828 formed by model mainly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203301568U CN202261561U (en) | 2011-09-05 | 2011-09-05 | Automatic focusing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203301568U CN202261561U (en) | 2011-09-05 | 2011-09-05 | Automatic focusing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202261561U true CN202261561U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203301568U Expired - Fee Related CN202261561U (en) | 2011-09-05 | 2011-09-05 | Automatic focusing system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202261561U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994268A (en) * | 2015-07-21 | 2015-10-21 | 广州众源网络科技有限公司 | Automatic focusing structure |
| CN105791666A (en) * | 2014-12-25 | 2016-07-20 | 北京展讯高科通信技术有限公司 | Automatic focusing device |
-
2011
- 2011-09-05 CN CN2011203301568U patent/CN202261561U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105791666A (en) * | 2014-12-25 | 2016-07-20 | 北京展讯高科通信技术有限公司 | Automatic focusing device |
| CN105791666B (en) * | 2014-12-25 | 2019-03-05 | 北京展讯高科通信技术有限公司 | Automatic focusing mechanism |
| CN104994268A (en) * | 2015-07-21 | 2015-10-21 | 广州众源网络科技有限公司 | Automatic focusing structure |
| CN104994268B (en) * | 2015-07-21 | 2018-05-15 | 广州众源网络科技有限公司 | A kind of automatic focusing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140905 |
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| EXPY | Termination of patent right or utility model |