CN110784700A - Dynamic power consumption control method of projector and low-power-consumption projector - Google Patents
Dynamic power consumption control method of projector and low-power-consumption projector Download PDFInfo
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- CN110784700A CN110784700A CN201911149377.2A CN201911149377A CN110784700A CN 110784700 A CN110784700 A CN 110784700A CN 201911149377 A CN201911149377 A CN 201911149377A CN 110784700 A CN110784700 A CN 110784700A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3155—Modulator illumination systems for controlling the light source
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
Abstract
The invention discloses a low-power-consumption projector, which comprises an image identification module, an LD driving module, an image compensation module and a projection display module; the LD driving module is respectively and electrically connected with the image recognition module, the image compensation module and the projection display module, and the image compensation module is electrically connected with the projection display module. The low-power-consumption projector can reduce the power consumption of the projector under the condition of keeping the brightness of the picture unchanged.
Description
Technical Field
The invention relates to the technical field of projectors, in particular to a dynamic power consumption control method of a projector and a low-power-consumption projector.
Background
With the continuous improvement of the technical level, the demand of people for videos is also continuously improved. The demand for ultra-large screen high brightness display is increasing day by day. In this background, the laser brightness of the projector is required to be increased. Along with the increasing of the laser brightness, the power consumption is continuously increased, the temperature of the whole projector is increased, and therefore the normal work of the projector cannot be guaranteed. Therefore, how to reduce the power consumption of the projector is an urgent problem to be solved under the condition of ensuring that the brightness of the picture is not changed.
Disclosure of Invention
The present invention is directed to overcome the above drawbacks in the background art, and provides a dynamic power consumption control method for a projector and a low power consumption projector, which can ensure that the power consumption of the projector is reduced under the condition of unchanged picture brightness.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a low-power consumption projector comprises an image identification module, an LD (laser diode) driving module, an image compensation module and a projection display module; the LD driving module is respectively and electrically connected with the image identification module, the image compensation module and the projection display module, and the image compensation module is electrically connected with the projection display module; the image identification module is used for receiving and analyzing the image signal and acquiring the highest R/G/B gray level state in the image signal; the LD driving module is used for dynamically adjusting and outputting an LD driving waveform according to the R/G/B gray level state of the image signal; the image compensation module is used for compensating R/G/B gray scale in the image signal; and the projection display module is used for emitting laser according to the corrected LD driving waveform and projecting the compensated image.
Meanwhile, the invention also discloses a dynamic power consumption control method of the projector, in particular to a dynamic power consumption control method based on independent control of R/G/B driving current, which is realized by the low-power-consumption projector and specifically comprises the following steps:
A. the image recognition module receives and analyzes the image signal, and acquires the highest R/G/B gray state in the current image signal, wherein the highest R/G/B gray state is (x, y, z);
the LD driving module compares the R/G/B highest gray state (x, y, z) acquired by the image identification module with a gray preset value (a, B, c) to obtain (x/a, y/B, z/c) that the R/G/B highest gray state is respectively the gray preset value;
C. correcting by taking m% as a first level, obtaining correction values (d%, e% and f%) according to the obtained (x/a, y/B and z/c), and correcting the LD driving waveform according to the correction values, wherein the corrected R/G/B current values are (d%, e% and f%) of the maximum current value, and d, e and f are the nearest corresponding to x/a, y/B and z/c when m% is taken as the first level and are not less than the percentage of the current level;
D. the image compensation module respectively compensates R/G/B gray values in the current image signals according to the corrected R/G/B current values obtained by the LD driving module, and the compensated R/G/B gray values are (x 100/d, y 100/e, z 100/f);
E. the projection display module emits laser according to the corrected LD driving waveform and projects an image after gray level compensation;
in the method, the R/G/B current value is corrected and controlled, so that the brightness of the laser light source is reduced by reducing the R/G/B control current on the premise of guaranteeing that the brightness of the current picture is not changed, and the aim of reducing the power consumption of the projector is fulfilled.
Further, the gradation predetermined value (a, b, c) is a full white signal gradation value (255, 255, 255).
Further, in the step C, correction is performed specifically with 10% as a level.
Meanwhile, the invention also discloses a dynamic power consumption control method of the projector, in particular to a dynamic power consumption control method when the R/G/B driving current can not be controlled independently, which is realized by the low-power consumption projector and comprises the following steps:
s1, an image recognition module receives and analyzes an image signal to obtain the highest R/G/B gray level state in the current image signal, wherein the highest R/G/B gray level state is (x, y, z);
s2, extracting a maximum value w in the R/G/B highest gray state (x, y, z) by the LD driving module, and comparing the maximum value w with a maximum value k in gray preset values (a, B, c) to obtain w/k with the R/G/B highest gray state as the gray preset value;
s3, correcting by taking m% as a first grade, obtaining a corrected value d% according to the obtained w/k, then correcting the R/G/B current value after correction to be d% of the maximum current value, and correcting the LD driving waveform according to the corrected value, wherein d is the percentage which is closest to the w/k when m% is the first grade and is not less than the current grade;
s4, the image compensation module respectively compensates R/G/B gray values in the current image signals according to the corrected R/G/B current values obtained by the LD driving module, and the compensated R/G/B gray values are (x 100/d, y 100/d, z 100/d);
and S5, the projection display module emits laser according to the corrected LD driving waveform and projects the image after gray level compensation.
Further, the gradation predetermined value (a, b, c) is a full white signal gradation value (255, 255, 255).
Further, in the step S3, the correction is specifically performed at 10% level.
Compared with the prior art, the invention has the following beneficial effects:
the dynamic power consumption control method of the projector and the low-power-consumption projector can reduce the R/G/B control current as much as possible under the condition of ensuring that the image brightness is not changed, thereby regulating and controlling the brightness of the laser light source and finally achieving the purpose of reducing the power consumption of the projector.
Drawings
Fig. 1 is a schematic diagram of a low power consumption projector of the present invention.
Detailed Description
The invention will be further elucidated and described with reference to the embodiments of the invention described hereinafter.
Example (b):
the first embodiment is as follows:
as shown in fig. 1, a low power consumption projector includes an image recognition module, an LD (laser diode) driving module, an image compensation module, and a projection display module; the LD driving module is respectively and electrically connected with the image identification module, the image compensation module and the projection display module, and the image compensation module is electrically connected with the projection display module; the image identification module is used for receiving and analyzing the image signal and acquiring the highest R/G/B gray level state in the image signal; the LD driving module is used for dynamically adjusting and outputting an LD driving waveform according to the R/G/B gray level state of the image signal; the image compensation module is used for compensating R/G/B gray scale in the image signal; and the projection display module is used for emitting laser according to the corrected LD driving waveform and projecting the compensated image.
Specifically, the low power consumption projector of the present embodiment can be applied to a scenario in which the R/G/B driving current can be controlled individually and a scenario in which the R/G/B driving current cannot be controlled individually.
Specifically, when the R/G/B driving current can be controlled individually, the method for controlling dynamic power consumption of the low power consumption projector of the embodiment specifically includes the following steps:
A. the image recognition module receives and analyzes the image signal, and acquires the highest R/G/B gray state in the current image signal, wherein the highest R/G/B gray state is (x, y, z);
the LD driving module compares the R/G/B highest gray state (x, y, z) acquired by the image identification module with a gray preset value (a, B, c) to obtain (x/a, y/B, z/c) that the R/G/B highest gray state is respectively the gray preset value;
C. correcting by taking m% as a first level, obtaining correction values (d%, e% and f%) according to the obtained (x/a, y/B and z/c), and correcting the LD driving waveform according to the correction values, wherein the corrected R/G/B current values are (d%, e% and f%) of the maximum current value, and d, e and f are the nearest corresponding to x/a, y/B and z/c when m% is taken as the first level and are not less than the percentage of the current level;
D. the image compensation module respectively compensates R/G/B gray values in the current image signals according to the corrected R/G/B current values obtained by the LD driving module, and the compensated R/G/B gray values are (x 100/d, y 100/e, z 100/f);
E. the projection display module emits laser according to the corrected LD driving waveform and projects an image after gray level compensation;
specifically, when the R/G/B driving current cannot be controlled individually, the dynamic power consumption control method of the low power consumption projector according to the embodiment specifically includes the following steps:
s1, an image recognition module receives and analyzes an image signal to obtain the highest R/G/B gray level state in the current image signal, wherein the highest R/G/B gray level state is (x, y, z);
s2, extracting a maximum value w in the R/G/B highest gray state (x, y, z) by the LD driving module, and comparing the maximum value w with a maximum value k in gray preset values (a, B, c) to obtain w/k with the R/G/B highest gray state as the gray preset value;
s3, correcting by taking m% as a first grade, obtaining a corrected value d% according to the obtained w/k, then correcting the R/G/B current value after correction to be d% of the maximum current value, and correcting the LD driving waveform according to the corrected value, wherein d is the percentage which is closest to the w/k when m% is the first grade and is not less than the current grade;
s4, the image compensation module respectively compensates R/G/B gray values in the current image signals according to the corrected R/G/B current values obtained by the LD driving module, and the compensated R/G/B gray values are (x 100/d, y 100/d, z 100/d);
and S5, the projection display module emits laser according to the corrected LD driving waveform and projects the image after gray level compensation.
Example two
A method for controlling dynamic power consumption of a projector according to a first embodiment of the present invention is a method for controlling dynamic power consumption of a projector, specifically, in this embodiment, the projector can individually control R/G/B driving currents, and specifically includes the following steps:
step 1, inputting a pair of images of R/G/B highest gray state (200, 200, 100) to a low-power-consumption projector.
And 2, receiving and analyzing the image signal by the image identification module, and acquiring the R/G/B highest gray level state of the current image signal (200, 200 and 100).
And 3, comparing the highest R/G/B gray state (200, 200, 100) with a preset gray value (a full white signal gray value) (255, 255, 255) by the LD driving module to obtain (200/255, 200/255, 100/255) that the highest R/G/B gray state is respectively the preset gray value, and rounding to obtain (79%, 79%, 40%).
In this embodiment, when correction is performed in 10% steps, R/G/B correction values (80%, 80%, 40%) are obtained, and the waveform of LD driving is corrected based on the correction values, that is, the R/G/B current is adjusted to the maximum value (80%, 80%, 40%).
And 4, respectively compensating the R/G/B gray scale values in the image signals by the image compensation module according to the correction values obtained by the LD driving module, wherein the compensation coefficients are respectively (100/80,100/80,100/40), and the compensated R/G/B gray scale values are respectively (200 × 100/80,200 × 100/80,100 × 100/40).
And 5, the projection display module emits laser according to the LD driving waveform and projects the image after gray compensation.
EXAMPLE III
Specifically, in this embodiment, the low power consumption projector cannot individually control the R/G/B driving current, and specifically includes the following steps:
step 1, inputting a pair of images of R/G/B highest gray state (200, 200, 150) respectively to a low-power-consumption projector.
And 2, receiving and analyzing the image signal by the image identification module, and acquiring the R/G/B highest gray level state of the current image signal (200, 200 and 150).
And 3, comparing the highest gray state 200 in the R/G/B with a maximum value 255 of a gray preset value (gray value of a full white signal) by the LD driving module to obtain 200/255 of which the highest gray state of the R/G/B is the gray preset value, and rounding to obtain 79%.
In this embodiment, correction is performed in 10% steps to obtain a correction value of R/G/B of 80%, and the waveform of LD driving is corrected based on the correction value to adjust the LD driving current to 80% of the maximum value.
And 4, respectively compensating the R/G/B gray-scale values in the image signals by the image compensation module according to the correction values obtained by the LD driving module, wherein the compensation coefficient is (100/80,100/80,100/40), and the compensated R/G/B gray-scale values are respectively (200 × 100/80,200 × 100/80,150 × 100/80).
And 5, the projection display module emits laser according to the LD driving waveform and projects the image after gray compensation.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (7)
1. A low-power consumption projector is characterized by comprising an image identification module, an LD driving module, an image compensation module and a projection display module; the LD driving module is respectively and electrically connected with the image identification module, the image compensation module and the projection display module, and the image compensation module is electrically connected with the projection display module;
the image identification module is used for receiving and analyzing the image signal and acquiring the highest R/G/B gray level state in the image signal; the LD driving module is used for dynamically adjusting and outputting an LD driving waveform according to the R/G/B gray level state of the image signal; the image compensation module is used for compensating R/G/B gray scale in the image signal; and the projection display module is used for emitting laser according to the corrected LD driving waveform and projecting the compensated image.
2. A dynamic power consumption control method of a projector, which is implemented by the low power consumption projector of claim 1, comprising the steps of:
A. the image recognition module receives and analyzes the image signal, and acquires the highest R/G/B gray state in the current image signal, wherein the highest R/G/B gray state is (x, y, z);
the LD driving module compares the R/G/B highest gray state (x, y, z) acquired by the image identification module with a gray preset value (a, B, c) to obtain (x/a, y/B, z/c) that the R/G/B highest gray state is respectively the gray preset value;
C. correcting by taking m% as a first level, obtaining correction values (d%, e% and f%) according to the obtained (x/a, y/B and z/c), and correcting the LD driving waveform according to the correction values, wherein the corrected R/G/B current values are (d%, e% and f%) of the maximum current value, and d, e and f are the nearest corresponding to x/a, y/B and z/c when m% is taken as the first level and are not less than the percentage of the current level;
D. the image compensation module respectively compensates R/G/B gray values in the current image signals according to the corrected R/G/B current values obtained by the LD driving module, and the compensated R/G/B gray values are (x 100/d, y 100/e, z 100/f);
E. and the projection display module emits laser according to the corrected LD driving waveform and projects the image after gray compensation.
3. The dynamic power consumption control method of a projector according to claim 2, wherein the gradation predetermined value (a, b, c) is a full white signal gradation value (255, 255, 255).
4. The method as claimed in claim 2, wherein the modification is performed in step C with 10% as a level.
5. A dynamic power consumption control method of a projector, which is implemented by the low power consumption projector of claim 1, comprising the steps of:
s1, an image recognition module receives and analyzes an image signal to obtain the highest R/G/B gray level state in the current image signal, wherein the highest R/G/B gray level state is (x, y, z);
s2, extracting a maximum value w in the R/G/B highest gray state (x, y, z) by the LD driving module, and comparing the maximum value w with a maximum value k in gray preset values (a, B, c) to obtain w/k with the R/G/B highest gray state as the gray preset value;
s3, correcting by taking m% as a first grade, obtaining a corrected value d% according to the obtained w/k, then correcting the R/G/B current value after correction to be d% of the maximum current value, and correcting the LD driving waveform according to the corrected value, wherein d is the percentage which is closest to the w/k when m% is the first grade and is not less than the current grade;
s4, the image compensation module respectively compensates R/G/B gray values in the current image signals according to the corrected R/G/B current values obtained by the LD driving module, and the compensated R/G/B gray values are (x 100/d, y 100/d, z 100/d);
and S5, the projection display module emits laser according to the corrected LD driving waveform and projects the image after gray level compensation.
6. The dynamic power consumption control method of a projector according to claim 5, wherein the gradation predetermined value (a, b, c) is a full white signal gradation value (255, 255, 255).
7. The method according to claim 2, wherein the step S3 is modified by 10%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000112030A (en) * | 1998-10-08 | 2000-04-21 | Minolta Co Ltd | Projection type picture display device |
| CN1722853A (en) * | 2004-07-15 | 2006-01-18 | 精碟科技股份有限公司 | Display device |
| CN1892800A (en) * | 2005-07-08 | 2007-01-10 | 精工爱普生株式会社 | Image display device and image display method |
| CN101600120A (en) * | 2008-06-04 | 2009-12-09 | 绎立锐光科技开发(深圳)有限公司 | Reduce the method for displaying image and the device of power consumption |
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- 2019-11-21 CN CN201911149377.2A patent/CN110784700A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000112030A (en) * | 1998-10-08 | 2000-04-21 | Minolta Co Ltd | Projection type picture display device |
| CN1722853A (en) * | 2004-07-15 | 2006-01-18 | 精碟科技股份有限公司 | Display device |
| CN1892800A (en) * | 2005-07-08 | 2007-01-10 | 精工爱普生株式会社 | Image display device and image display method |
| CN101600120A (en) * | 2008-06-04 | 2009-12-09 | 绎立锐光科技开发(深圳)有限公司 | Reduce the method for displaying image and the device of power consumption |
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Application publication date: 20200211 |