CN109740393A - Bar code scanning system and method - Google Patents
Bar code scanning system and method Download PDFInfo
- Publication number
- CN109740393A CN109740393A CN201811485945.1A CN201811485945A CN109740393A CN 109740393 A CN109740393 A CN 109740393A CN 201811485945 A CN201811485945 A CN 201811485945A CN 109740393 A CN109740393 A CN 109740393A
- Authority
- CN
- China
- Prior art keywords
- exposure
- bar code
- time
- light filling
- described image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Studio Devices (AREA)
- Image Input (AREA)
Abstract
The present invention provides a kind of bar code scanning system and its method.The bar code scanning system includes: an imaging sensor, to acquire bar code image and convert digital signal for image；One light filling unit, light filling when to Image Acquisition；One main control unit starts to expose acquisition image and trigger the light filling unit to start simultaneously at light filling to generate trigger signal triggering described image sensor；The main control unit is further to control the exposure cycle of described image sensor and the light filling cycle synchronisation of the light filling unit；Described image sensor is in standby before being waken up by trigger signal triggering.The power consumption of whole system can be reduced in this way.
Description
Technical field
The present invention relates to a kind of bar code scanning system and method, espespecially a kind of bar code scanning system to reduce power consumption and
Method.
Background technique
Bar code scan speed can greatly influence user experience.A kind of existing bar code scan equipment includes: a shell,
It is contained in the camera, light source and CPU of shell, camera is to read bar code, while light source is to emit illumination light,
CPU is to decode.The working condition of camera can be generally divided into tri- kinds of states of Active, Standy and ShutDown, tradition
Bar code scan equipment, be in Shutdown state when, camera is usually required by entering after powering on, being arranged register
Active state, and when being in Standby state, camera still needs and enters Active state by the way that register is arranged,
Process is complicated, either requires longer time from Standy or ShutDown pattern switching to Active mode, leads
Power consumption and real-time is caused to cannot be considered in terms of.In the industry in order to improve scanning speed, in advance by camera and light source usually before barcode scanning
It opens, so that camera is in Active state for a long time, in barcode scanning, camera no longer needs to carry out state switching, when saving
Between.
However, power consumption is high, and especially in radio scan equipment, this defect is outstanding when camera is in Active state
It is protruded, and is caused radio scan equipment cruising ability insufficient, is unable to satisfy the demand of continuation of the journey for a long time.
The present invention is in view of the above problems, provide a kind of new bar code scanning system and method, using new methods and techniques
Means are to solve these problems.
Summary of the invention
For background technique problem encountered, it is an object of the present invention to a kind of bar code scanning system and sides
Method, the trigger signal generated by main control unit trigger described image sensor and start exposure acquisition image and trigger the light filling
Unit starts simultaneously at light filling, and described image sensor is in standby before being waken up by trigger signal triggering, whole to reduce
The power consumption of a system.
To achieve the above object, invention uses following technological means:
The present invention provides a kind of bar code scanning system.The bar code scanning system includes:
One imaging sensor, to acquire the image of bar code and convert digital signal for described image；
One light filling unit acquires light filling when image with image taking sensor；
One main control unit starts exposure acquisition generating trigger signal triggering described image sensor and image and triggers
The light filling unit starts simultaneously at light filling；The main control unit to further control the exposure cycle of described image sensor with
The light filling cycle synchronisation of the light filling unit；
Wherein, described image sensor is in standby before being waken up by trigger signal triggering.
Optionally, the main control unit is to be generated the trigger signal by external signal triggering；The external signal
For continuous signal, the trigger signal is single pulse signal, and the duration of the exposure cycle is greater than the trigger signal
Duration and be less than the external signal duration.
Optionally, the lighting time in the light filling period and blanking time respectively with the time for exposure of the exposure cycle and
Signal transmission time is synchronous.
Optionally, the exposure cycle of described image sensor is fixed value, and the time for exposure of the exposure cycle is preset with
The time for exposure of one maximum value and a minimum value, each exposure cycle is automatic according to the time for exposure of previous exposure cycle
Adjustment, time for exposure first time after described image sensor is waken up is a preset initial value, and the initial value is greater than institute
It states minimum value and is less than the maximum value.
Optionally, at the end of bar code scan, described image sensor reenters standby mode.
Optionally, the main control chip has a GPIO pin dedicated to transmit the trigger signal, described image sensing
Device has a triggering pin dedicated to receive the trigger signal.
The present invention also provides a kind of bar code scanning methods.The bar code scanning method includes:
A. external signal triggering main control unit generates trigger signal；
B. trigger signal, which wakes up and triggers described image sensor, starts exposure acquisition image, and triggers light filling unit simultaneously
Start light filling；
C. the exposure cycle of the main control unit control described image sensor and the light filling period of the light filling unit are same
Step；
D. the main control unit decodes acquired image.
Optionally, in step, the external signal is continuous signal, and the trigger signal is single pulse signal, institute
The duration for stating exposure cycle is greater than the duration of the trigger signal and is less than the duration of the external signal.
Optionally, in stepb, the exposure cycle of described image sensor is fixed value, the exposure of the exposure cycle
Time is preset with a maximum value and a minimum value, and time for exposure of each exposure cycle is according to the exposure of previous exposure cycle
Adjust automatically between light time, time for exposure first time after described image sensor is waken up is a preset initial value, described first
Initial value is greater than the minimum value and is less than the maximum value；In step C, the lighting time in the light filling period and blanking time point
It is not synchronous with the time for exposure of the exposure cycle and signal transmission time.
Optionally, when successfully decoded or decoding time-out or the external signal terminate, this bar code scan terminates；
At the end of this bar code scan, described image sensor reenters standby mode.
Compared with prior art, the invention has the following advantages:
The trigger signal generated by main control unit triggers described image sensor and starts exposure acquisition image and trigger institute
It states light filling unit and starts simultaneously at light filling, described image sensor is in standby before being waken up by trigger signal triggering, with
Reduce the power consumption of whole system.To promote response real-time simultaneously, the present invention triggers CMOS by trigger signal and enters exposure in real time
Photoperiod starts to acquire image, promotes the response speed of CMOS.The main control unit further controls described image sensor
The light filling cycle synchronisation of exposure cycle and the light filling unit, further decreases system power dissipation.
Detailed description of the invention
Fig. 1 is the perspective view of scanning means of the present invention；
Fig. 2 is the schematic diagram of bar code scanning system of the present invention；
Fig. 3 is the timing diagram of bar code scanning system barcode scanning of the present invention；
Fig. 4 is the flow chart of bar code scanning system barcode scanning of the present invention.
The drawing reference numeral of specific embodiment illustrates:
Bar code scanning system 100；Imaging sensor 1；Camera lens 11；CMOS chip 12；Trigger pin 121；Light filling unit 2；
Light compensating lamp 21；Light filling control unit 22；Main control unit 3；GPIO pin 31；Scanning means 200；Shell 201；Button 202；Display
Screen 203；Bar code B.
Specific embodiment
Purpose, structure, feature and effect to facilitate the understanding of the present invention etc., now in conjunction with attached drawing and specific implementation
The invention will be further described for mode.
Bar code scanning system 100 of the invention is suitable for radio scan equipment (PDA), scanner and the fixed scanning of industry
In a variety of scanning means 200 such as instrument.
As shown in Figure 1, the scanning means 200 in the present embodiment is by taking radio scan equipment (PDA) as an example, the scanning means
200 there is a shell 201 and a button 202 set on 201 upper surface of shell, a display screen 203 to be embedded at institute
It states on shell 201, for showing bar code B information, the button 202 generates an external signal with for pressing, and the bar code is swept
System 100 is retouched to be contained in the shell 201.In other embodiments (not shown), the button 202 may be configured as it is touch and
It is integrated on the display screen 203.
As shown in Fig. 2, the bar code scanning system 100 includes 1, light filling unit 2 of an imaging sensor and electricity
Property connection described image sensor 1 and the light filling unit 2 a main control unit 3.
Described image sensor 1 includes a camera lens 11 and a CMOS chip 12 to acquire bar code B image.It is described
CMOS chip 12 and the camera lens 11 cooperate, to convert digital signal for collected bar code B image.
The CMOS chip 12 have a dedicated triggering pin 121 be connected to one of the main control unit 3 it is dedicated
GPIO pin 31.Described image sensor 1 uses global exposure mode, according to preset frame per second, and periodically exposure acquisition is schemed
Picture.
The light filling unit 2 includes that two light compensating lamps 21 and two light fillings control corresponding with two light compensating lamps 21 are single
Member 22, two light compensating lamps 21 are integrated in the front end of described image sensor 1, positioned at the two sides of the camera lens 11.The benefit
Light control unit 22 controls the light compensating lamp 21 and periodically shines.
The frame per second of described image sensor 1 can be previously written the main control unit 3.Frame per second 20- in the present embodiment
50FPS, preferably 40FPS, the corresponding exposure cycle of described image sensor 1 are 50-20ms, preferably 25ms.Further,
The exposure cycle is made of time for exposure and transmission time, and the time for exposure is preset with a maximum of TmaxAnd minimum value
Tmin, so that time for exposure adjust automatically Shi Junjie of the time for exposure of each exposure cycle according to previous exposure cycle
In the maximum of TmaxWith minimum value TminBetween.In the present embodiment, the maximum of TmaxPreferably 12ms, minimum value TminIt is preferred that
For Tmax/500.Further, the time for exposure of first frame image is acquired after described image sensor 1 is waken up every time through pre-
It is set as an initial value, which is less than in maximum of TmaxAnd it is greater than minimum value Tmin, preferably 9ms in the present embodiment, so that
For described image sensor 1 in the convergence process of automatic exposure, the time for exposure can quickly converge on suitable target value, when saving
Between, reduce power consumption.
Referring to figure 2. and shown in Fig. 3, after the scanning means 200 booting, the display screen 203 is first turned on, to mention
Show that user carries out next step operation, when user's push button 202 starts scanning, the compression of button 202 formation one continuous external
Signal, main control unit 3 are triggered and the trigger signal of one single-impulse of generation by the external signal, described in trigger signal warp
The dedicated GPIO pin 31 to transmit the trigger signal of main control unit 3 is transmitted to the dedicated next of the CMOS chip 12
The triggering pin 121 of the trigger signal is received to wake up CMOS chip 12.Described image sensor 1 starts periodicity
Exposure, and first frame bar code B image is acquired with initial exposure time, first frame bar code B image is converted number by CMOS chip 12
Word signal and the ISP module for being transmitted to main control unit 3, after ISP module analyzes the data informations such as the brightness of image, according to this frame
The time for exposure of image data carrys out the time for exposure of appropriate adjustment next frame image, to obtain clearer image.Due to described
GPIO pin 31 and the triggering pin 121, which are distinguished, dedicated transmits and receives the trigger signal, fast response time.
While CMOS chip 12 is waken up, two light filling control units 22 by the trigger signal triggering,
Two light compensating lamps 21 of control, which start periodically to shine, carries out light filling, and the main control unit 3 controls the light compensating lamp 21
Fluorescent lifetime is synchronous with the time for exposure of described image sensor 1, controls blanking time and the described image of the light compensating lamp 21
The transmission time of sensor 1 is synchronous, further decreases power consumption.It (is used when successfully decoded or decoding time-out or external signal terminate
Family release button 202), this end of scan to bar code B, the CMOS chip 12 of described image sensor 1 is again introduced into standby
State is waken up again when waiting user's push button 202 next time；The display screen 203 enters in the CMOS chip 12
Standby mode (can be set) by user oneself close afterwards for a period of time.In the present embodiment, the external signal is continuous signal, institute
Stating trigger signal is single pulse signal, and duration of the exposure cycle is greater than duration of the trigger signal and small
In the duration of the external signal.In the present embodiment, the external signal is the generation of user's push button 202, Qi Tashi
It applies in example (not shown), the external signal can also be incuded by IR to be generated, and when IR senses bar code B, is then passed external signal
Transport to main control unit 3.
As shown in figure 4, the bar code scanning system 100 scans bar code B especially by following method:
410, user's button press 202 generates the external signal, and the external signal triggering main control unit 3 generates described
Trigger signal.
In step 410, the external signal is continuous signal, and the trigger signal is single pulse signal, the exposure
The duration of photoperiod is greater than the duration of the trigger signal and is less than the duration of the external signal.
420, the trigger signal is spread out of via GPIO pin 31 dedicated on the main control unit 3, and via the figure
As the dedicated trigger pin 121 of sensor 1 is transmitted to described image sensor 1, wakes up and trigger the beginning of described image sensor 1
Exposure acquisition image, and trigger the light filling unit 2 and start simultaneously at light filling.
At step 420, the exposure cycle of described image sensor 1 is fixed value.The time for exposure of the exposure cycle
A maximum value and a minimum value are preset with, when time for exposure of each exposure cycle is according to the exposure of previous exposure cycle
Between adjust automatically.Time for exposure first time after described image sensor 1 is waken up is preset initial value, and the initial value is big
In the minimum value and it is less than the maximum value.
430, the main control unit 3 controls the exposure cycle of described image sensor 1 and the light filling week of the light filling unit 2
Phase is synchronous.
In step 430, the lighting time in the light filling period and the blanking time exposure with the exposure cycle respectively
Time is synchronous with signal transmission time.
440, the main control unit 3 decodes acquired image signal.When successfully decoded or decoding time-out or external letter
Number terminate when (user's release button 202), bar code B-scan terminates.
At the end of bar code B-scan, described image sensor 1 is again introduced into standby mode.The display screen 203 is described
CMOS chip 12 (can be set) for a period of time by user oneself into standby mode and be closed afterwards.
Bar code scanning system and method for the invention has the advantages that
Start exposure acquisition image 1. the trigger signal generated by main control unit 3 triggers described image sensor 1 and touch
It sends out light filling unit 2 described and starts simultaneously at light filling, described image sensor 1 is in standby shape before being waken up by trigger signal triggering
State can reduce the power consumption of whole system 100.Meanwhile in order to promote response real-time, the present invention is also triggered by trigger signal
CMOS chip 12 enters exposure cycle in real time and starts to acquire image, promotes the response speed of CMOS chip 12.The main control unit 3
The exposure cycle of described image sensor 1 and the light filling cycle synchronisation of the light filling unit 2 are further controlled, further decreases and is
The power consumption of system 100.
2. described image sensor 1 is again introduced into standby mode at the end of bar code B-scan, compared to traditional image
For sensor 1 is still within operating state in a period of time after barcode scanning, power consumption can be effectively reduced.
Detailed description above is only the explanation of the preferred embodiments of the invention, the scope of the patents that is non-therefore limiting to the present invention,
So all, with this creation specification and diagramatic content institute, equivalence techniques change for it, are both contained in the scope of the patents of this creation
It is interior.
Claims (10)
1. a kind of bar code scanning system characterized by comprising
One imaging sensor, to acquire the image of bar code and convert digital signal for described image；
One light filling unit acquires light filling when image with image taking sensor；
One main control unit starts described in exposure acquisition image and triggering to generate trigger signal triggering described image sensor
Light filling unit starts simultaneously at light filling；The main control unit to further control the exposure cycle of described image sensor with it is described
The light filling cycle synchronisation of light filling unit；
Wherein, described image sensor is in standby before being waken up by trigger signal triggering.
2. bar code scanning system as described in claim 1, it is characterised in that: the main control unit by an external signal to be touched
Hair generates the trigger signal；The external signal is continuous signal, and the trigger signal is single pulse signal, the exposure
The duration in period is greater than the duration of the trigger signal and is less than the duration of the external signal.
3. bar code scanning system as described in claim 1, it is characterised in that: when the lighting time and blanking in the light filling period
Between it is synchronous with the time for exposure of the exposure cycle and signal transmission time respectively.
4. bar code scanning system as described in claim 1, it is characterised in that: the exposure cycle of described image sensor is to fix
Value, the time for exposure of the exposure cycle are preset with a maximum value and a minimum value, the time for exposure of each exposure cycle
According to the time for exposure adjust automatically of previous exposure cycle, time for exposure first time after described image sensor is waken up is
Preset initial value, the initial value are greater than the minimum value and are less than the maximum value.
5. bar code scanning system as described in claim 1, it is characterised in that: at the end of bar code scan, described image sensing
Device reenters standby mode.
6. bar code scanning system as described in claim 1, it is characterised in that: the main control chip has a GPIO pin dedicated
To transmit the trigger signal, described image sensor has a triggering pin dedicated to receive the trigger signal.
7. a kind of bar code scanning method characterized by comprising
A. external signal triggering main control unit generates trigger signal；
B. trigger signal, which wakes up and triggers imaging sensor, starts exposure acquisition image, and triggers light filling unit and start simultaneously at benefit
Light；
C. the light filling cycle synchronisation of the exposure cycle of the main control unit control described image sensor and the light filling unit；
D. the main control unit decodes acquired image.
8. bar code scanning method as claimed in claim 7, it is characterised in that: in step, the external signal is continuous letter
Number, the trigger signal is single pulse signal, duration of the exposure cycle be greater than the trigger signal it is lasting when
Between and be less than the external signal duration.
9. bar code scanning method as claimed in claim 7, it is characterised in that: in stepb, the exposure of described image sensor
Period is fixed value, and the time for exposure of the exposure cycle is preset with a maximum value and a minimum value, each exposure cycle
Time for exposure according to the time for exposure adjust automatically of previous exposure cycle, described image sensor be waken up after first time
Time for exposure is preset initial value, and the initial value is greater than the minimum value and is less than the maximum value；In step C, institute
Lighting time and the blanking time for stating the light filling period are synchronous with the time for exposure of the exposure cycle and signal transmission time respectively.
10. bar code scanning method as claimed in claim 7, it is characterised in that: when successfully decoded or decoding time-out or institute
When stating external signal termination, this bar code scan terminates；At the end of this bar code scan, described image sensor is reentered
Standby mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485945.1A CN109740393A (en) | 2018-12-06 | 2018-12-06 | Bar code scanning system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485945.1A CN109740393A (en) | 2018-12-06 | 2018-12-06 | Bar code scanning system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109740393A true CN109740393A (en) | 2019-05-10 |
Family
ID=66358508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485945.1A Pending CN109740393A (en) | 2018-12-06 | 2018-12-06 | Bar code scanning system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109740393A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111079464A (en) * | 2019-12-27 | 2020-04-28 | 深圳盈达信息科技有限公司 | Data terminal and data acquisition method thereof |
| CN111160056A (en) * | 2019-12-14 | 2020-05-15 | 无锡盈达聚力科技有限公司 | Data acquisition device and data acquisition method thereof |
| CN112040139A (en) * | 2020-09-09 | 2020-12-04 | 绍兴埃瓦科技有限公司 | Light supplementing method for camera imaging |
| CN112351214A (en) * | 2020-09-22 | 2021-02-09 | 智博汽车科技(上海)有限公司 | Method and device for assisting face image acquisition, readable storage medium and vehicle |
| CN112489322A (en) * | 2020-11-18 | 2021-03-12 | 上海商米科技集团股份有限公司 | Quick code scanning method for POS machine product |
| CN115146664A (en) * | 2022-09-06 | 2022-10-04 | 无锡盈达聚力科技有限公司 | Image acquisition method and device |
| CN115220286A (en) * | 2022-07-18 | 2022-10-21 | 上海商米科技集团股份有限公司 | Code scanning engine scanning method, system, code scanning device and storage medium |
| CN115396572A (en) * | 2022-08-11 | 2022-11-25 | 无锡盈达聚力科技有限公司 | Optical information collector and method |
| CN116132777A (en) * | 2023-01-30 | 2023-05-16 | 威海华菱光电股份有限公司 | Contact image sensor |
| WO2024032379A1 (en) * | 2022-08-11 | 2024-02-15 | 无锡盈达聚力科技有限公司 | Optical information collector and method therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096273A (en) * | 2010-12-29 | 2011-06-15 | 北京空间机电研究所 | Automatic exposure method of space camera based on target characteristics |
| CN102801920A (en) * | 2012-07-25 | 2012-11-28 | 中国科学院长春光学精密机械与物理研究所 | Sensorless continuous automatic exposure time adjusting and controlling device of camera |
| CN108416239A (en) * | 2018-01-31 | 2018-08-17 | 深圳盈达信息科技有限公司 | A kind of bar code identifies the control method of engine and its reduction power consumption |
-
2018
- 2018-12-06 CN CN201811485945.1A patent/CN109740393A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096273A (en) * | 2010-12-29 | 2011-06-15 | 北京空间机电研究所 | Automatic exposure method of space camera based on target characteristics |
| CN102801920A (en) * | 2012-07-25 | 2012-11-28 | 中国科学院长春光学精密机械与物理研究所 | Sensorless continuous automatic exposure time adjusting and controlling device of camera |
| CN108416239A (en) * | 2018-01-31 | 2018-08-17 | 深圳盈达信息科技有限公司 | A kind of bar code identifies the control method of engine and its reduction power consumption |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111160056B (en) * | 2019-12-14 | 2023-10-03 | 无锡盈达聚力科技有限公司 | Data acquisition device and data acquisition method thereof |
| CN111160056A (en) * | 2019-12-14 | 2020-05-15 | 无锡盈达聚力科技有限公司 | Data acquisition device and data acquisition method thereof |
| CN111079464A (en) * | 2019-12-27 | 2020-04-28 | 深圳盈达信息科技有限公司 | Data terminal and data acquisition method thereof |
| CN111079464B (en) * | 2019-12-27 | 2024-04-19 | 深圳盈达信息科技有限公司 | Data terminal and data acquisition method thereof |
| CN112040139A (en) * | 2020-09-09 | 2020-12-04 | 绍兴埃瓦科技有限公司 | Light supplementing method for camera imaging |
| CN112040139B (en) * | 2020-09-09 | 2022-07-29 | 绍兴埃瓦科技有限公司 | Light supplementing method for camera imaging |
| CN112351214A (en) * | 2020-09-22 | 2021-02-09 | 智博汽车科技(上海)有限公司 | Method and device for assisting face image acquisition, readable storage medium and vehicle |
| CN112351214B (en) * | 2020-09-22 | 2022-05-06 | 智博汽车科技(上海)有限公司 | Method and device for assisting face image acquisition, readable storage medium and vehicle |
| CN112489322A (en) * | 2020-11-18 | 2021-03-12 | 上海商米科技集团股份有限公司 | Quick code scanning method for POS machine product |
| CN115220286A (en) * | 2022-07-18 | 2022-10-21 | 上海商米科技集团股份有限公司 | Code scanning engine scanning method, system, code scanning device and storage medium |
| CN115220286B (en) * | 2022-07-18 | 2024-02-27 | 上海商米科技集团股份有限公司 | Code scanning engine scanning method and system, code scanning equipment and storage medium |
| CN115396572A (en) * | 2022-08-11 | 2022-11-25 | 无锡盈达聚力科技有限公司 | Optical information collector and method |
| CN115396572B (en) * | 2022-08-11 | 2023-12-15 | 无锡盈达聚力科技有限公司 | Optical information collector and method |
| WO2024032379A1 (en) * | 2022-08-11 | 2024-02-15 | 无锡盈达聚力科技有限公司 | Optical information collector and method therefor |
| CN115146664B (en) * | 2022-09-06 | 2022-12-23 | 无锡盈达聚力科技有限公司 | Image acquisition method and device |
| CN115146664A (en) * | 2022-09-06 | 2022-10-04 | 无锡盈达聚力科技有限公司 | Image acquisition method and device |
| CN116132777A (en) * | 2023-01-30 | 2023-05-16 | 威海华菱光电股份有限公司 | Contact image sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109740393A (en) | Bar code scanning system and method | |
| US7268924B2 (en) | Optical reader having reduced parameter determination delay | |
| CN108416239B (en) | A kind of bar code identifies the control method of engine and its reduction power consumption | |
| JP2011254317A (en) | Transmission device, transmission method, reception device, reception method, communication system and communication method | |
| US20110169999A1 (en) | Terminal having plurality of operating modes | |
| TW200813788A (en) | Operation control and data processing in an electronic pen | |
| TW200300913A (en) | Image input apparatus, subject identification system, subject verification system and image input method | |
| CN100545729C (en) | A kind of control method that is installed in the external camera flash-light on the portable terminal | |
| US7405755B2 (en) | Frame grabber | |
| Duque et al. | Unleashing the power of LED-to-camera communications for IoT devices | |
| US20040165233A1 (en) | Method of operating a double-sided scanner | |
| JPH10221692A (en) | Display device | |
| WO2019000848A1 (en) | Control method and processing apparatus | |
| CN111126343B (en) | Driving method and driving device for photoelectric sensor and display device | |
| CN110062145A (en) | Depth camera, electronic equipment and image acquiring method | |
| CN110333788B (en) | Operation device, position detection system, and control method for operation device | |
| CN103685974A (en) | Imaging device and control method | |
| CN108830160B (en) | Facial feature acquisition method, mobile terminal and storage medium | |
| CN109460686B (en) | Method and system for blanking aiming light of aiming device | |
| WO2024032379A1 (en) | Optical information collector and method therefor | |
| CN115426442B (en) | Optical information collector and method | |
| CN115396572B (en) | Optical information collector and method | |
| US20070230941A1 (en) | Device and method for detecting ambient light | |
| CN110852127A (en) | Bar code reading method and terminal | |
| TW200527176A (en) | Light source control module suitable for use in optical index apparatus and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190510 |