阅读说明：本技术 一种双控双模式座舱照明系统及方法 (Double-control and double-mode cabin lighting system and method ) 是由 朱红宁 李静 于 2020-05-26 设计创作，主要内容包括：本发明公开一种双控双模式座舱照明系统及方法,其由导光板本体、照明模式转换开关、亮度调节电位器、信号采集模块、CPU控制模块、调光驱动模块及电源模块等部件组成。本发明的有益效果在于：在满足夜视兼容性需求的同时具有超大动态范围的调光性能。日状态下使用蓝白光,具有良好的可视性；夜状态下使用夜视绿,具有良好的夜视兼容性。通过采用高亮度时使用电压调光和低亮度时使用PWM调光的调光方法,无论是高亮度时还是低亮度时都具有良好的可调性和亮度均匀性,具备良好的调光效果。(The invention discloses a double-control and double-mode cabin lighting system and a method. The invention has the beneficial effects that: the requirement of night vision compatibility is met, and meanwhile, the dimming performance with an ultra-large dynamic range is achieved. The blue-white light is used in the daytime state, so that the visibility is good; the night vision is used in the night state, and the night vision compatibility is good. By adopting the dimming method of dimming by using the voltage during high brightness and dimming by using the PWM during low brightness, the dimming control circuit has good adjustability and brightness uniformity both during high brightness and during low brightness, and has good dimming effect.)

1. A dual-control dual-mode cabin lighting system is characterized by comprising,

the light guide plate body is arranged inside the cabin, and a blue-white light source and a night vision green light source are arranged inside the light guide plate body;

the illumination mode conversion switch corresponds to the light guide plate body and is used for providing an illumination mode analog quantity signal which is a blue-white light working signal or a night vision green working signal;

the brightness adjusting potentiometer corresponds to the light guide plate body and is used for providing a brightness adjusting analog quantity signal;

a signal acquisition module for receiving the illumination mode analog quantity signal from the illumination mode conversion switch and the brightness adjustment analog quantity signal from the brightness adjustment potentiometer and converting the illumination mode analog quantity signal and the brightness adjustment analog quantity signal into a corresponding illumination mode digital quantity signal and a corresponding brightness adjustment digital quantity signal;

the CPU control module is used for receiving the illumination mode digital quantity signal and the brightness adjusting digital quantity signal from the signal acquisition module, determining that only one of the blue-white light source and the night vision green light source in the light guide plate is driven to work according to the illumination mode digital quantity signal, and outputting a corresponding voltage adjusting signal and a corresponding PWM adjusting signal according to the brightness adjusting digital quantity signal; and the number of the first and second groups,

a dimming driving module having a voltage adjustment driving unit for outputting a corresponding light guide plate driving voltage according to the voltage adjustment signal from the CPU control module and a PWM adjustment driving unit for changing a duty ratio of the light guide plate driving voltage from the voltage adjustment driving unit according to the PWM adjustment signal from the CPU control module;

wherein the light guide plate body is driven by the light guide plate driving voltage from the PWM adjustment driving unit.

2. The dual-control dual-mode cabin lighting system according to claim 1, wherein the lighting mode switch has a first position and a second position; when the interior of the cabin needs blue-white light illumination, the illumination mode conversion switch is switched to the first gear, and the illumination mode analog quantity signal provided by the illumination mode conversion switch is a blue-white light working signal; when the interior of the cabin needs night vision green illumination, the illumination mode change-over switch is switched to the second gear, and the illumination mode analog quantity signal provided by the illumination mode change-over switch is a night vision green working signal.

3. The dual-control dual-mode cabin lighting system according to claim 1, further comprising a power module, wherein the power module is configured to supply power to the CPU control module and the dimming driving module.

4. A double-control double-mode cabin lighting method is characterized by comprising the following steps,

providing the cabin lighting system of any one of claims 1 to 3;

providing an illumination mode analog quantity signal by the illumination mode conversion switch, wherein the illumination mode analog quantity signal is a blue-white light working signal or a night vision green working signal;

providing a brightness adjustment analog quantity signal by the brightness adjustment potentiometer;

receiving, by the signal acquisition module, the illumination mode analog quantity signal from the illumination mode conversion switch and the brightness adjustment analog quantity signal from the brightness adjustment potentiometer and converting the illumination mode analog quantity signal and the brightness adjustment analog quantity signal into a corresponding illumination mode digital quantity signal and a brightness adjustment digital quantity signal;

the CPU control module receives the illumination mode digital quantity signal and the brightness adjusting digital quantity signal from the signal acquisition module, determines that only one of the blue-white light source and the night vision green light source in the light guide plate is driven to work according to the illumination mode digital quantity signal, and outputs a corresponding voltage adjusting signal and a corresponding PWM adjusting signal according to the brightness adjusting digital quantity signal;

outputting a corresponding light guide plate driving voltage by the voltage regulation driving unit according to the voltage regulation signal from the CPU control module;

changing, by the PWM adjustment driving unit, a duty ratio of the light guide plate driving voltage from the voltage adjustment driving unit according to the PWM adjustment signal from the CPU control module;

the light guide plate body is driven by the light guide plate driving voltage from the PWM adjustment driving unit.

5. The dual-control dual-mode cabin lighting method according to claim 4, wherein when the brightness value corresponding to the brightness adjusting digital quantity signal is higher, the CPU control module maintains the PWM adjusting signal unchanged, and performs brightness adjustment on the light guide plate body through the voltage adjusting signal; when the brightness value corresponding to the brightness adjusting digital quantity signal is lower, the CPU control module maintains the voltage adjusting signal unchanged, and the brightness of the light guide plate body is adjusted through the PWM adjusting signal.

Technical Field

The invention relates to illumination of a cockpit, in particular to a dual-control dual-mode cockpit illumination system and method.

Background

At present, with the continuous development of lighting technology and the requirement of night vision compatibility, single white light illumination is far from meeting the requirements of illumination and display of instrument panels in a cabin and signs, characters and marks on a control console. The blue-white light has friendly visibility in a daytime state, and the blue-white light illumination can remarkably reduce the visual fatigue of people under the daytime condition, so that the blue-white light is suitable for being used in a cabin in the daytime state; the night vision green can greatly improve the glare, shadow and reflection of the cockpit in night navigation, has good night vision compatibility, and is suitable for illumination in the cockpit at night.

In order to meet the requirement of night vision compatibility, the light guide plate and the instrument in the cockpit have the dual-mode illumination function of blue-white light/night vision green, and the light guide plate and the instrument in the cockpit use blue-white light in the daytime state and use night vision green in the night state.

Also, the conventional LED type light source has two dimming ways: voltage dimming and PWM dimming. Voltage dimming is the most common dimming mode, and mainly controls the brightness of a light source by adjusting a voltage source, so that when the voltage of the adjustable voltage source is changed, the working current of a dimmed LED can be changed, and the brightness adjustment is realized; the biggest disadvantage of voltage dimming is poor adjustability and brightness uniformity at low brightness, and it is difficult to achieve wide-range adjustment at low brightness. The working principle of PWM dimming is as follows: the voltage of a voltage source is kept unchanged, dimming is carried out by changing the duty ratio, specifically, the duty ratio of an electronic switch is controlled, the proportion of on-off time is further adjusted, and then the brightness of a light source is averaged based on the persistence of vision principle of human eyes, so that the aim of adjusting the brightness is fulfilled. The biggest defects of pure PWM dimming are as follows: the dimming effect of the LED is poor at low brightness, and the adjustment of very low brightness cannot be achieved.

Therefore, a large-range and wide-dynamic illumination system and method capable of realizing blue-white light and night vision green dual-mode illumination, namely, the illumination system has good night vision compatibility and simultaneously has voltage dimming and PWM dimming are urgently needed.

Disclosure of Invention

The invention provides a novel double-control and double-mode cabin lighting system, aiming at solving the defect that voltage dimming or PWM dimming is independently used in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows: a dual-control dual-mode cabin lighting system comprises,

the light guide plate body is arranged inside the cabin, and a blue-white light source and a night vision green light source are arranged inside the light guide plate body;

the illumination mode conversion switch corresponds to the light guide plate body and is used for providing an illumination mode analog quantity signal which is a blue-white light working signal or a night vision green working signal;

the brightness adjusting potentiometer corresponds to the light guide plate body and is used for providing a brightness adjusting analog quantity signal;

a signal acquisition module for receiving the illumination mode analog quantity signal from the illumination mode conversion switch and the brightness adjustment analog quantity signal from the brightness adjustment potentiometer and converting the illumination mode analog quantity signal and the brightness adjustment analog quantity signal into a corresponding illumination mode digital quantity signal and a corresponding brightness adjustment digital quantity signal;

the CPU control module is used for receiving the illumination mode digital quantity signal and the brightness adjusting digital quantity signal from the signal acquisition module, determining that only one of the blue-white light source and the night vision green light source in the light guide plate is driven to work according to the illumination mode digital quantity signal, and outputting a corresponding voltage adjusting signal and a corresponding PWM adjusting signal according to the brightness adjusting digital quantity signal; and the number of the first and second groups,

a dimming driving module having a voltage adjustment driving unit for outputting a corresponding light guide plate driving voltage according to the voltage adjustment signal from the CPU control module and a PWM adjustment driving unit for changing a duty ratio of the light guide plate driving voltage from the voltage adjustment driving unit according to the PWM adjustment signal from the CPU control module;

wherein the light guide plate body is driven by the light guide plate driving voltage from the PWM adjustment driving unit.

As a preferable scheme of the double-control double-mode cabin lighting system, the lighting mode conversion switch is provided with a first gear and a second gear; when the interior of the cabin needs blue-white light illumination, the illumination mode conversion switch is switched to the first gear, and the illumination mode analog quantity signal provided by the illumination mode conversion switch is a blue-white light working signal; when the interior of the cabin needs night vision green illumination, the illumination mode change-over switch is switched to the second gear, and the illumination mode analog quantity signal provided by the illumination mode change-over switch is a night vision green working signal.

As a preferred scheme of the dual-control dual-mode cabin lighting system, the dual-control dual-mode cabin lighting system further comprises a power module, wherein the power module is used for supplying power to the CPU control module and the dimming driving module.

The invention also provides a double-control and double-mode cabin lighting method, which comprises the following steps,

providing a cabin lighting system;

providing an illumination mode analog quantity signal by the illumination mode conversion switch, wherein the illumination mode analog quantity signal is a blue-white light working signal or a night vision green working signal;

providing a brightness adjustment analog quantity signal by the brightness adjustment potentiometer;

receiving, by the signal acquisition module, the illumination mode analog quantity signal from the illumination mode conversion switch and the brightness adjustment analog quantity signal from the brightness adjustment potentiometer and converting the illumination mode analog quantity signal and the brightness adjustment analog quantity signal into a corresponding illumination mode digital quantity signal and a brightness adjustment digital quantity signal;

the CPU control module receives the illumination mode digital quantity signal and the brightness adjusting digital quantity signal from the signal acquisition module, determines that only one of the blue-white light source and the night vision green light source in the light guide plate is driven to work according to the illumination mode digital quantity signal, and outputs a corresponding voltage adjusting signal and a corresponding PWM adjusting signal according to the brightness adjusting digital quantity signal;

outputting a corresponding light guide plate driving voltage by the voltage regulation driving unit according to the voltage regulation signal from the CPU control module;

changing, by the PWM adjustment driving unit, a duty ratio of the light guide plate driving voltage from the voltage adjustment driving unit according to the PWM adjustment signal from the CPU control module;

the light guide plate body is driven by the light guide plate driving voltage from the PWM adjustment driving unit.

As a preferred scheme of the dual-control dual-mode cabin lighting method, when the brightness value corresponding to the brightness adjusting digital quantity signal is higher, the CPU control module maintains the PWM adjusting signal unchanged, and performs brightness adjustment on the light guide plate body through the voltage adjusting signal; when the brightness value corresponding to the brightness adjusting digital quantity signal is lower, the CPU control module maintains the voltage adjusting signal unchanged, and the brightness of the light guide plate body is adjusted through the PWM adjusting signal.

Compared with the prior art, the invention has the beneficial effects that: the requirement of night vision compatibility is met, and meanwhile, the dimming performance with an ultra-large dynamic range is achieved. The blue-white light is used in the daytime state, so that the visibility is good; the night vision is used in the night state, and the night vision compatibility is good. By adopting the dimming method of dimming by using the voltage during high brightness and dimming by using the PWM during low brightness, the dimming control circuit has good adjustability and brightness uniformity both during high brightness and during low brightness, and has good dimming effect.

In addition to the technical problems solved by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the dimming driving module according to the present invention.

Detailed Description

The invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, a dual-control dual-mode cabin lighting system is shown, which may be used in aircraft applications.

The cabin lighting system mainly comprises a light guide plate body 1, a lighting mode change-over switch 2, a brightness adjusting potentiometer 3, a signal acquisition module 4, a CPU control module 5, a dimming driving module 6, a power module 7 and the like.

The light guide plate body 1 is arranged inside the cabin. The light guide plate body 1 functions as illumination and/or indication. The light guide plate body 1 has two working modes of blue-white light and night vision green, namely, two groups of light sources are arranged inside the light guide plate body 1 and respectively are a blue-white light source and a night vision green light source, and the two groups of light sources do not work at the same time. That is, when the blue-white light source is active, the night vision green light source is inactive. When the night vision green light source works, the blue-white light source does not work.

The lighting mode switch 2 corresponds to the light guide plate body 1. By the illumination mode changeover switch 2, it is determined that only one of the blue-white light source and the night vision green light source in the light guide plate is operated. The illumination mode conversion switch 2 is used for providing an illumination mode analog quantity signal. The illumination mode analog quantity signal is a blue-white light working signal or a night vision green working signal. In this embodiment, the lighting mode switch 2 has two gears, which are a first gear and a second gear. When the interior of the cabin needs blue-white light illumination, the illumination mode switch 2 is switched to the first gear, and the illumination mode analog quantity signal provided by the illumination mode switch 2 is a blue-white light working signal. When night vision green illumination is needed inside the cabin, the illumination mode change-over switch 2 is switched to the second gear, and the illumination mode analog quantity signal provided by the illumination mode change-over switch 2 is a night vision green working signal.

The brightness adjustment potentiometer 3 corresponds to the light guide plate body 1. The brightness value of the light source working in the light guide plate body 1 is adjusted by the brightness adjustment potentiometer 3. The brightness adjusting potentiometer 3 is used for providing a brightness adjusting analog quantity signal. The brightness adjusting potentiometer 3 is rotated to adjust the magnitude of the brightness adjusting analog quantity signal.

It should be noted that the number of the light guide plate body 1 and the brightness adjustment potentiometer 3 may be 1, 2, or more, depending on the actual requirement.

The signal acquisition module 4 is configured to receive the illumination mode analog quantity signal from the illumination mode switch 2 and the brightness adjustment analog quantity signal from the brightness adjustment potentiometer 3, and convert the illumination mode analog quantity signal and the brightness adjustment analog quantity signal into a corresponding illumination mode digital quantity signal and a corresponding brightness adjustment digital quantity signal to output to the CPU control module 5.

The CPU control module 5 is configured to receive the illumination mode digital quantity signal and the brightness adjustment digital quantity signal from the signal acquisition module 4.

According to the illumination mode digital quantity signal, the CPU control module 5 determines the operation mode of the light guide plate. When the illumination mode digital quantity signal corresponds to a blue-white light working signal, the CPU control module 5 controls the blue-white light source in the light guide plate to work, and the night vision green light source does not work. When the illumination mode digital quantity signal corresponds to a night vision green working signal, the CPU control module 5 controls the night vision green light source in the light guide plate to work, and the blue-white light source does not work.

According to the brightness adjusting digital quantity signal, the CPU control module 5 outputs a voltage adjusting signal and a PWM adjusting signal to the dimming driving module 6.

Referring to fig. 2, the dimming driving module 6 has a voltage regulation driving unit 61 and a PWM regulation driving unit 62. The voltage adjustment driving unit 61 is configured to output a corresponding light guide plate driving voltage according to the voltage adjustment signal from the CPU control module 5. The PWM adjustment driving unit 62 is configured to change the duty ratio of the light guide plate driving voltage according to the PWM adjustment signal from the CPU control module 5. The light guide plate body 1 is driven by the light guide plate driving voltage from the PWM adjusting driving unit 62.

When the brightness value corresponding to the brightness adjustment digital quantity signal is higher, the CPU control module 5 maintains the PWM adjustment signal unchanged, and performs brightness adjustment on the light guide plate body 1 through the voltage adjustment signal.

When the brightness value corresponding to the brightness adjustment digital quantity signal is low, the CPU control module 5 maintains the voltage adjustment signal unchanged, adjusts the brightness of the light guide plate body 1 through the PWM adjustment signal, adjusts the on-off time ratio by controlling the duty ratio of the electronic switch in a duty ratio dimming manner, and averages the brightness of the light source based on the principle of persistence of vision of human eyes to achieve the purpose of adjusting the brightness.

The higher and lower luminance values are relative concepts, and the specific boundary between the higher luminance values and the lower luminance values is set according to actual needs.

The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.