CN115086568A - Interframe power consumption compensation method of vehicle-mounted analog camera - Google Patents
Interframe power consumption compensation method of vehicle-mounted analog camera Download PDFInfo
- Publication number
- CN115086568A CN115086568A CN202210693155.2A CN202210693155A CN115086568A CN 115086568 A CN115086568 A CN 115086568A CN 202210693155 A CN202210693155 A CN 202210693155A CN 115086568 A CN115086568 A CN 115086568A
- Authority
- CN
- China
- Prior art keywords
- vehicle
- analog camera
- mounted analog
- frame image
- resistor
- 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
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000012790 confirmation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000872 buffer Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Abstract
The invention provides a method for compensating interframe power consumption of a vehicle-mounted analog camera, which comprises the following steps of: the duty ratio of a PWM signal of a pulse width modulator is adjusted to compensate the working power of a vehicle-mounted analog camera when the vehicle-mounted analog camera transmits a front frame image, the vehicle-mounted analog camera transmits a plurality of pairs of front frame images and rear frame images, the data of the rear frame images are copied to the data of the front frame images of the same pair, and the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is smaller than the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the rear frame images in each pair, so that the compensation of the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is realized; the effective time of the PWM signal is determined through the timer, so that the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image is determined, the accurate confirmation of the compensation time of the working power consumption when the vehicle-mounted analog camera transmits the previous frame image is realized, the inter-frame power consumption step of the vehicle-mounted analog camera is compensated at low cost, and the quality of the output video of the vehicle-mounted analog camera is improved.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to an interframe power consumption compensation method for a vehicle-mounted analog camera.
Background
The camera photosensitive effect under the low-illumination environment is used as an important index for measuring the performance of the vehicle-mounted analog camera. In a night scene, the frame reducing strategy of reducing the frame rate of data stream flowing out of the photosensitive element is used for improving the time of the photosensitive element for energy charging and exposure, so that the photosensitive performance of the camera in a low-illumination environment is improved. In the vehicle-mounted analog camera, a three-core wire or a four-core wire is generally required to be used for supplying power, and the power supply mode has the condition that an input power supply and an output signal are in common ground, namely, the current ground wire must be referred to when hardware generates an analog video signal, wherein the common ground of the current ground wire and the input power supply and the output signal are not the same ground. This causes the light sensing element to cause power consumption fluctuation before and after the frame dropping strategy is started, and such fluctuation affects the analog video signal output of the vehicle-mounted analog camera, which appears as a splash screen on the vehicle-mounted camera video.
Aiming at the problems, the problem of screen flashing of the vehicle-mounted analog camera is solved by adding an external constant current hardware module for optimization, but the hardware cost is increased.
Disclosure of Invention
The invention aims to provide a method for compensating interframe power consumption of a vehicle-mounted analog camera, which solves the problem of screen flashing of the vehicle-mounted analog camera on the basis of not increasing hardware cost.
In order to solve the above problem, the present invention provides a method for compensating inter-frame power consumption of a vehicle-mounted analog camera, comprising the following steps:
step S1: compensating the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits a front frame image by adjusting the duty ratio of a PWM signal of a pulse width modulator, wherein the vehicle-mounted analog camera transmits a plurality of pairs of front frame images and rear frame images, the data of the rear frame images are copied to the data of the front frame images of the same pair, and in each pair, the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is less than the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the rear frame images; and
step S2: and determining the effective time of the PWM signal through a timer so as to determine the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image.
Optionally, in step S1, in each pair, the operating current of the in-vehicle analog camera when transmitting the previous frame image is smaller than the operating current of the in-vehicle analog camera when transmitting the subsequent frame image.
Optionally, the pulse width modulator includes first resistance, second resistance, third resistance, electric capacity and switching transistor, the power is connected to the one end of first resistance, the other end of first resistance is connected the source electrode of switching transistor, the grid connection of switching transistor the one end of second resistance, the one end of electric capacity still is connected simultaneously, the PWM signal is imported to the other end of second resistance, the drain electrode of switching transistor is connected the one end of third resistance, the other end of third resistance with the other end of electric capacity is all grounded.
Further, the power supply voltage is 3.3V, the resistance of the first resistor is 51 Ω, the resistance of the second resistor is 1000 Ω, the resistance of the third resistor is 0, and the value of the capacitor is 1000F.
Further, the PWM signal is periodically given a high level and a low level, and when the vehicle-mounted analog camera transmits a previous frame image, the PWM signal is at the high level, the switching transistor is turned on, and at this time, a current is generated between a power supply and the ground, and the current flows from the first resistor through the switching transistor and the third resistor.
Optionally, a frame break is provided between the adjacent previous frame image and the adjacent subsequent frame image, and a timer is designed in the frame break to determine the working power compensation time.
Optionally, the working power compensation time includes an on-time and an off-time of the PWM signal and a duty ratio of the PWM signal.
Further, when the PWM signal is turned on, the duty ratio of the PWM signal is a preset value, and when the PWM signal is turned off, the duty ratio of the PWM signal is 0.
Optionally, step S2 includes:
acquiring and obtaining a current timing diagram of the working current of the vehicle-mounted analog camera by using an oscilloscope so as to obtain time points of working power step of a front frame image and a rear frame image when the vehicle-mounted analog camera transmits the front frame image and the rear frame image; and
and the timer confirms the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image according to the time point of the working power step, and the PWM signal controls the power consumption of the vehicle-mounted analog camera according to the working power compensation time.
Further, the time point of the working power step includes a time point when the working current for transmitting the previous frame image by the vehicle-mounted camera starts, and a time point when the working current for transmitting the previous frame image by the vehicle-mounted camera is stepped to a time point when the working current for transmitting the subsequent frame image by the vehicle-mounted camera.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for compensating interframe power consumption of a vehicle-mounted analog camera, which comprises the following steps of: compensating the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits a front frame image by adjusting the duty ratio of a PWM signal of a pulse width modulator, wherein the vehicle-mounted analog camera transmits a plurality of pairs of front frame images and rear frame images, the data of the rear frame images are copied to the data of the front frame images of the same pair, and in each pair, the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is less than the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the rear frame images, so that the compensation of the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is realized; and determining the effective time of the PWM signal through a timer so as to determine the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image, and realizing accurate confirmation of the compensation time of the working power consumption when the vehicle-mounted analog camera transmits the previous frame image, thereby realizing the compensation of the inter-frame power consumption step of the vehicle-mounted analog camera with low cost and improving the quality of the video output by the vehicle-mounted analog camera.
Drawings
Fig. 1 is a schematic flowchart illustrating a method for compensating inter-frame power consumption of a vehicle-mounted analog camera according to an embodiment of the present invention;
FIG. 2 is a current timing diagram of the operating current of the vehicle-mounted analog camera according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a modulation pulse width modulator according to an embodiment of the present invention;
fig. 4 is a current timing diagram of the working current after compensation when the vehicle-mounted camera transmits the previous frame image according to an embodiment of the present invention.
Description of reference numerals:
a, working current when a vehicle-mounted analog camera transmits a rear frame image; b, working current when the vehicle-mounted analog camera transmits the previous frame image; m-frame interruption; 1-PWM signal.
Detailed Description
The inter-frame power consumption compensation method of an in-vehicle analog camera according to the present invention will be described in further detail below. The present invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.
In order to make the objects and features of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly aiding in the description of the embodiments of the invention.
Under the condition of low-illumination environment, the vehicle-mounted analog camera adopts a frame reduction strategy for reducing the frame rate of data stream flowing out of the photosensitive element to improve the charging exposure time of the photosensitive element, and at the moment, the frame rate of output data stream of the photosensitive element is reduced, for example, the frame rate of the output data stream is reduced from 30 to 15; meanwhile, a buffer module in the vehicle-mounted analog camera buffers and copies each frame of image data into two frames of image data for use. Therefore, the working power of the whole vehicle-mounted analog camera is low when the data of the front frame image and the rear frame image are transmitted, and the working power of the whole vehicle-mounted analog camera is high when the data of the front frame image and the rear frame image are transmitted, wherein the working power is low when the data of the other frame image are transmitted, and the working current of the vehicle-mounted analog camera is low when the data of the low-power frame image are transmitted; when one frame of image data with high power is transmitted, the working current of the vehicle-mounted analog camera is high, and the current difference of the two frames of image data is obvious, so that the working power step is generated between frames of video transmitted by the vehicle-mounted analog camera, and the image transmitted by the vehicle-mounted analog camera appears a splash screen.
Fig. 1 is a schematic flowchart of a method for compensating inter-frame power consumption of a vehicle-mounted analog camera according to this embodiment. As shown in fig. 1, in order to implement compensation of a working power step when the whole vehicle-mounted analog camera transmits two frames of images, the embodiment provides a method for compensating inter-frame power consumption of the vehicle-mounted analog camera, which implements accurate compensation of inter-frame power consumption of the video output by the whole vehicle-mounted analog camera by using a control strategy based on adjusting a Pulse Width Modulator (PWM) and a timer, thereby ensuring power consumption stability of the whole vehicle-mounted analog camera in a use period and avoiding the inter-frame power consumption step phenomenon of the vehicle-mounted analog camera.
The interframe power consumption compensation method of the vehicle-mounted analog camera comprises the following steps of:
step S1: compensating the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits a front frame image by adjusting the duty ratio of a PWM signal of a pulse width modulator, wherein the vehicle-mounted analog camera transmits a plurality of pairs of front frame images and rear frame images, the data of the rear frame images are copied to the data of the front frame images of the same pair, and in each pair, the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is less than the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the rear frame images; and
step S2: and determining the effective time of the PWM signal through a timer so as to determine the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image.
The inter-frame power consumption compensation method of the in-vehicle analog camera according to the present embodiment will be described in detail below with reference to fig. 1 to 4.
Step S1 is executed first, in which the duty ratio of the PWM signal of the pulse width modulator (i.e. PWM) is adjusted to compensate the working power of the on-board analog camera for transmitting the previous frame image, wherein the on-board analog camera transmits a plurality of pairs of the previous frame image and the next frame image, the data of the next frame image is copied to the data of the previous frame image of the same pair, and in each pair, the working power of the on-board analog camera for transmitting the previous frame image is less than the working power of the on-board analog camera for transmitting the next frame image.
In this step, since the operating power of the on-board analog camera when transmitting the previous frame image is smaller than the operating power of the on-board analog camera when transmitting the subsequent frame image in each pair, the operating current b of the on-board analog camera when transmitting the previous frame image is smaller than the operating current of the on-board analog camera when transmitting the subsequent frame image in each pair. Therefore, the difference between the working current b when the vehicle-mounted analog camera transmits the front frame image and the working current a when the vehicle-mounted analog camera transmits the rear frame image is reduced by compensating the working current when the vehicle-mounted analog camera transmits the front frame image, so that the working power compensation of the vehicle-mounted analog camera for transmitting the front frame image can be realized, the inter-frame power consumption compensation of the vehicle-mounted analog camera is realized, and the problem of screen flashing of the vehicle-mounted analog camera is solved on the basis of not increasing the hardware cost.
Fig. 3 is a circuit diagram of the modulation pulse width modulator of the present embodiment. As shown in fig. 3, the pulse width modulator includes a first resistor R1, a second resistor R2, a third resistor R3, a capacitor C, and a switching transistor Q, wherein one end of the first resistor R1 is connected to a power supply VDD, the other end of the first resistor R1 is connected to a source of the switching transistor Q, a gate of the switching transistor Q is connected to one end of the second resistor R2 and to one end of the capacitor C, a PWM signal is input to the other end of the second resistor R2, a drain of the switching transistor Q is connected to one end of the third resistor R3, and the other end of the third resistor R3 and the other end of the capacitor C are both grounded to GND.
In this embodiment, the voltage of the power supply VDD is, for example, 3.3V, the resistance of the first resistor R1 may be 51 Ω, the resistance of the second resistor R2 may be 1000 Ω, the resistance of the third resistor R3 is 0, and the value of the capacitor C is 1000F. In other embodiments, values of the power supply VDD, the first resistor R1, the second resistor R2, the third resistor R3, and the capacitor C may be changed according to actual requirements, for example, only values of the third resistor R3 are changed.
The PWM signal is periodically endowed with a high level and a low level, when the vehicle-mounted analog camera transmits a previous frame image, the PWM signal is at the high level, the switching transistor Q is turned on, at the moment, current is generated between a power supply VDD and a ground GND, and the current flows through the switching transistor Q and the third resistor R3 from the first resistor R1, namely, the current is generated in the PWM, so that the power of the first resistor R1 is loaded as an additional load generated by the pulse width modulator, and the working current of the vehicle-mounted analog camera is increased by the current; when the in-vehicle analog camera transmits a subsequent frame image, the switching transistor Q is turned off, and at this time, no current is generated between the power supply VDD and the ground GND, and no additional load is generated by the pulse width modulator. That is to say, by adjusting the duty ratio of the PWM signal, an additional load may be generated in cooperation with the first resistor R1 to compensate the working power of the vehicle-mounted analog camera when transmitting the previous frame image, so that the working power of the vehicle-mounted analog camera when transmitting the previous frame image is as close as possible to the working power of the vehicle-mounted analog camera when transmitting the subsequent frame image, thereby realizing the compensation of the working power consumption of the vehicle-mounted analog camera when transmitting the previous frame image.
In order to accurately compensate the working power of the vehicle-mounted analog camera for transmitting the previous frame image, step S2 is executed to determine the effective time of the PWM signal 1 by a timer to determine the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image. Wherein the working power compensation time comprises the on-time and the off-time of the PWM signal 1 and the duty ratio of the PWM signal 1.
Because frame interrupt m exists between every two frames of image data (namely between the adjacent previous frame image and the adjacent subsequent frame image) transmitted by the vehicle-mounted analog camera, a timer is designed in the frame interrupt m to determine the opening time and the closing time of the PWM signal 1 and the duty ratio of the PWM signal 1, so that the effective time of the PWM signal 1 is accurately controlled. In this step, when the PWM signal 1 is turned on, the duty ratio of the PWM signal 1 is a preset value, and when the PWM signal 1 is turned off, the duty ratio of the PWM signal 1 is 0.
The method specifically comprises the following steps:
fig. 2 is a current timing chart of an operating current of the on-vehicle analog camera of the on-vehicle video camera of the present embodiment. As shown in fig. 2, firstly, in order to accurately control the effective timing of the PWM signal, an oscilloscope is required to acquire and obtain a current timing chart of the operating current of the on-board analog camera, based on which the time point of the operating power step when the on-board analog camera transmits the previous frame image and the next frame image can be determined.
Fig. 4 is a current timing chart of the working current after compensation when the vehicle-mounted camera of the present embodiment transmits the previous frame image. As shown in fig. 4, next, the timer confirms the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image according to the time point of the working power step (i.e. the time point when the working current for transmitting the previous frame image by the vehicle-mounted camera starts, and the time point when the working current for transmitting the previous frame image by the vehicle-mounted camera steps to the working current for transmitting the next frame image by the vehicle-mounted camera), and the PWM signal controls the power consumption of the vehicle-mounted analog camera according to the working power compensation time, that is, the inter-frame power consumption compensation of the vehicle-mounted analog camera is accurately realized.
Through repeated tests, in actual measurement, the power consumption step of the inter-frame power consumption compensation method of the vehicle-mounted analog camera, which is provided by the embodiment, is very small when the vehicle-mounted analog camera transmits the front frame image and when the vehicle-mounted analog camera transmits the rear frame image and does not have power to perform working power compensation, so that the accurate compensation of the inter-frame power consumption in the frame-down application scene of the vehicle-mounted analog camera is realized, and the problem of screen flashing of the vehicle-mounted analog camera is solved.
The specific steps of the inter-frame power consumption compensation method for the vehicle-mounted analog camera may further include executing step S2 first and then executing step S1.
In summary, the present invention provides a method for compensating inter-frame power consumption of a vehicle-mounted analog camera, which compensates working power of the vehicle-mounted analog camera when transmitting a previous frame image by adjusting a duty ratio of a PWM signal of a pulse width modulator, wherein the vehicle-mounted analog camera transmits a plurality of pairs of previous frame images and subsequent frame images, data of the subsequent frame images is copied to data of the previous frame images of the same pair, and in each pair, the working power of the vehicle-mounted analog camera when transmitting the previous frame image is less than the working power of the vehicle-mounted analog camera when transmitting the subsequent frame image, thereby implementing compensation of the working power of the vehicle-mounted analog camera when transmitting the previous frame image; and determining the effective time of the PWM signal through a timer so as to determine the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image, and realizing accurate confirmation of the compensation time of the working power consumption when the vehicle-mounted analog camera transmits the previous frame image, thereby realizing the compensation of the inter-frame power consumption step of the vehicle-mounted analog camera with low cost and improving the quality of the video output by the vehicle-mounted analog camera.
In addition, unless otherwise specified or indicated, the description of the terms "first" and "second" in the specification is only used for distinguishing various components, elements, steps and the like in the specification, and is not used for representing logical relationships or sequential relationships among the various components, elements, steps and the like.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. An interframe power consumption compensation method of a vehicle-mounted analog camera is characterized by comprising the following steps of:
step S1: compensating the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits a front frame image by adjusting the duty ratio of a PWM signal of a pulse width modulator, wherein the vehicle-mounted analog camera transmits a plurality of pairs of front frame images and rear frame images, the data of the rear frame images are copied to the data of the front frame images of the same pair, and in each pair, the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the front frame images is less than the working power of the vehicle-mounted analog camera when the vehicle-mounted analog camera transmits the rear frame images; and
step S2: and determining the effective time of the PWM signal through a timer so as to determine the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image.
2. The method for compensating for interframe power consumption of an in-vehicle analog camera according to claim 1, wherein in step S1, in each pair, an operating current at which the in-vehicle analog camera transmits the previous frame image is smaller than an operating current at which the in-vehicle analog camera transmits the subsequent frame image.
3. The method for compensating the inter-frame power consumption of the vehicle-mounted analog camera according to claim 1, wherein the pulse width modulator comprises a first resistor, a second resistor, a third resistor, a capacitor and a switching transistor, one end of the first resistor is connected with a power supply, the other end of the first resistor is connected with a source electrode of the switching transistor, a gate electrode of the switching transistor is connected with one end of the second resistor and one end of the capacitor, a PWM signal is input into the other end of the second resistor, a drain electrode of the switching transistor is connected with one end of the third resistor, and the other end of the third resistor and the other end of the capacitor are both grounded.
4. The method for compensating the inter-frame power consumption of the vehicle-mounted analog camera according to claim 3, wherein the power supply voltage is 3.3V, the resistance of the first resistor is 51 Ω, the resistance of the second resistor is 1000 Ω, the resistance of the third resistor is 0, and the value of the capacitor is 1000F.
5. The method for compensating for power consumption between frames of a vehicle-mounted analog camera according to claim 3, wherein the PWM signal is periodically applied with a high level and a low level, and when the vehicle-mounted analog camera transmits a previous frame image, the PWM signal is applied with the high level, the switching transistor is turned on, and when a current is generated between a power supply and ground, and a current flows from the first resistor through the switching transistor and the third resistor.
6. The method for compensating for interframe power consumption of an in-vehicle analog camera according to claim 1, wherein adjacent preceding frame images and subsequent frame images have a frame break therebetween, and a timer is designed within the frame break to determine the operating power compensation time.
7. The method for compensating for power consumption between frames of an in-vehicle analog camera according to claim 1, wherein the operating power compensation time includes an on time, an off time of the PWM signal, and a duty ratio of the PWM signal.
8. The method for compensating for the power consumption between frames of an on-vehicle analog camera according to claim 7, wherein when the PWM signal is turned on, the duty ratio of the PWM signal takes a preset value, and when the PWM signal is turned off, the duty ratio of the PWM signal is 0.
9. The method for compensating for the inter-frame power consumption of the in-vehicle analog camera according to claim 1, wherein the step S2 includes:
acquiring and obtaining a current timing chart of the working current of the vehicle-mounted analog camera by using an oscilloscope so as to obtain the time point of working power step when the vehicle-mounted analog camera transmits the front frame image and the rear frame image; and
and the timer confirms the working power compensation time when the vehicle-mounted analog camera transmits the previous frame image according to the time point of the working power step, and the PWM signal controls the power consumption of the vehicle-mounted analog camera according to the working power compensation time.
10. The method for compensating for interframe power consumption of an on-vehicle analog camera according to claim 9, wherein the time point of the operating power step includes a time point when an operating current at which the previous frame image is transmitted by the on-vehicle video camera starts, and an operating current step at which the previous frame image is transmitted by the on-vehicle video camera to a time point of an operating current at which the subsequent frame image is transmitted by the on-vehicle video camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210693155.2A CN115086568A (en) | 2022-06-17 | 2022-06-17 | Interframe power consumption compensation method of vehicle-mounted analog camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210693155.2A CN115086568A (en) | 2022-06-17 | 2022-06-17 | Interframe power consumption compensation method of vehicle-mounted analog camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115086568A true CN115086568A (en) | 2022-09-20 |
Family
ID=83254568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210693155.2A Pending CN115086568A (en) | 2022-06-17 | 2022-06-17 | Interframe power consumption compensation method of vehicle-mounted analog camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115086568A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430198A (en) * | 2015-10-30 | 2016-03-23 | 宁波萨瑞通讯有限公司 | Device and method used for adjusting handset illumination brightness |
| WO2018205235A1 (en) * | 2017-05-12 | 2018-11-15 | 天彩电子（深圳）有限公司 | Method for improving night vision distance and reducing power consumption, apparatus and system |
| CN110214448A (en) * | 2017-01-31 | 2019-09-06 | 索尼公司 | Information processing unit and method |
| CN113301255A (en) * | 2021-05-21 | 2021-08-24 | 上海富瀚微电子股份有限公司 | Power consumption adjusting method and device and storage medium |
-
2022
- 2022-06-17 CN CN202210693155.2A patent/CN115086568A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430198A (en) * | 2015-10-30 | 2016-03-23 | 宁波萨瑞通讯有限公司 | Device and method used for adjusting handset illumination brightness |
| CN110214448A (en) * | 2017-01-31 | 2019-09-06 | 索尼公司 | Information processing unit and method |
| WO2018205235A1 (en) * | 2017-05-12 | 2018-11-15 | 天彩电子（深圳）有限公司 | Method for improving night vision distance and reducing power consumption, apparatus and system |
| CN113301255A (en) * | 2021-05-21 | 2021-08-24 | 上海富瀚微电子股份有限公司 | Power consumption adjusting method and device and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4801117B2 (en) | Afterimage avoidance method and apparatus | |
| CN102522070B (en) | Control circuit for eliminating glittering and shutdown ghosting phenomena of thin film field effect transistor | |
| KR100275087B1 (en) | Liquid crystal display device | |
| CN103544927B (en) | Display drive circuit, display device and display drive method | |
| JP4814028B2 (en) | Liquid crystal display | |
| CN104269148A (en) | Liquid crystal driving circuit, liquid crystal driving method and liquid crystal display device | |
| US9280927B2 (en) | Display device, imaging device and gray level voltage generation circuit | |
| WO2020087559A1 (en) | Overcurrent protection circuit and display drive device | |
| US10685615B2 (en) | Shift register and driving method thereof, gate driving circuit, and display device | |
| CN105027189A (en) | Liquid crystal display device and method for driving same | |
| CN215770465U (en) | Display driving circuit and display device | |
| TWI434254B (en) | Gate pulse modulation circuit and angle modulating method thereof | |
| CN101315747A (en) | LCD panel and its image element driving method | |
| CN108615510B (en) | Chamfering circuit and control method | |
| KR20070065797A (en) | Method for eliminating residual image in display device | |
| US10417988B2 (en) | Gate driver on array driving circuit and liquid crystal display device having the same | |
| CN115086568A (en) | Interframe power consumption compensation method of vehicle-mounted analog camera | |
| US20090212832A1 (en) | Load capacity driving circuit | |
| CN109616043A (en) | A kind of voltage control circuit and its control method, display device | |
| CN106328064B (en) | A kind of scan drive circuit | |
| KR19990016186A (en) | Driving Method of Liquid Crystal Display | |
| US9886892B2 (en) | Gate driving circuit, gate driving method, and display apparatus | |
| US20160112046A1 (en) | Driver circuit with device variation compensation and operation method thereof | |
| CN213277411U (en) | Timing adjustment device and display apparatus | |
| US10109229B2 (en) | Display panel driving circuit and compensation method thereof |
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 |