KR20190110237A - System for controlling LED line light and method for controlling the same - Google Patents

Abstract

Embodiment of the present invention, the LED line illuminator is a plurality of LED channels grouped with LEDs for each channel are arranged in a line to be illuminated in a line form; And after adjusting the overall line brightness value so that the overall line brightness value of the LED line illuminator becomes a preset reference value, calculating the brightness change rate (%) for each channel when comparing the brightness of the LED channel with the brightness of the LED reference channel. And a line lighting controller configured to control the brightness of each channel as a value to which the brightness change rate for each channel is applied.

Description

LED line light brightness control system and its control method {System for controlling LED line light and method for controlling the same}

The present invention relates to a LED line illumination brightness control system and a control method thereof, and a system and method for controlling the illumination brightness of the LED line illuminator.

Recently, LED (Light Emitting Diode) devices have been in the spotlight as light sources of various lighting devices. LED devices have less heat generation than conventional illumination light sources, and have advantages such as low power consumption, long lifespan, and impact resistance. In addition, since mercury or a discharge gas is not used, such as a fluorescent lamp, the manufacturing process has an advantage of not causing environmental pollution.

If the LED device provides proper power supply and heat dissipation means, it can be kept on even after 100,000 hours of use. The light output of all the light sources gradually decreases over time. Up to 80% of the initial light intensity is not easily perceived by humans. Based on this, the lighting life of the LED device is currently estimated to be about 40,000 to 50,000 hours. Therefore, the LED element can be said to be a long lifespan light source with a very long life compared to 1500 hours of incandescent bulbs and 10,000 hours of fluorescent lamps.

In recent years, due to the advantages of being able to perform various color rendering, long life and low electricity consumption, LED line illuminators using LED (Light Emitting Diode) have been widely developed and used, and their shapes and shapes are also diversified. have. For example, as shown in FIG. 1, an LED line illuminator is a device in which LEDs are arranged in a line and illuminated in a line form, including a circuit board 1 having an LED L on which a lens 1a is mounted. And, as shown in the circuit board (1) is elongated by extrusion molding, a transparent plate (2) for shielding the circuit board (1) and the circuit board (1) transparently installed is installed, the cover is bolted fixed ( 12) is composed of a concave aluminum heat dissipation frame 10 of which both ends are closed.

On the other hand, such an LED line illuminator is composed of several channels of LEDs as a group, as shown in FIG.

Multiple channels should have the same brightness, so line illumination shows uniform brightness throughout. When the above function is correct, the device intended for inspection under the line light appears constant when viewed with the camera.

However, there is a problem that the lifetime of all LEDs is not always constant, and also because the brightness of the LEDs differs from the beginning, the brightness of all channel-specific and channel-to-channel LEDs is not constant.

Therefore, there is an urgent need for a means for detecting a case where the lifetime of the LED in use is partially reached or when the amount of light changes.

Korean Patent Registration No. 10-0883345

An object of the present invention is to provide a means for detecting and controlling the lighting of a case in which the lifetime of the LED in use or the amount of light changes.

Embodiment of the present invention, the LED line illuminator is a plurality of LED channels grouped with LEDs for each channel are arranged in a line to be illuminated in a line form; And after adjusting the overall line brightness value so that the overall line brightness value of the LED line illuminator becomes a preset reference value, calculating the brightness change rate (%) for each channel when comparing the brightness of the LED channel with the brightness of the LED reference channel. And a line lighting controller configured to control the brightness of each channel as a value to which the brightness change rate for each channel is applied.

The line lighting controller calculates a brightness change rate (%) for each channel for each channel by setting one LED channel among the LED channels in the LED line illuminator as an LED reference channel, and the set LED reference channel and each LED channel. By measuring the brightness deviation between the respective LED channels, the ratio of the brightness deviation of each LED channel compared to the brightness value of the LED reference channel can be converted for each channel as the brightness change rate (%) for each channel.

Controlling the brightness of each channel as the value of applying the brightness change rate for each channel by the line lighting controller may be performed by adjusting the overall brightness of the line of the LED line illuminator by applying the brightness increase / decrease value requested by the user. The brightness of each channel may be controlled by applying the brightness change rate for each channel.

In addition, the embodiment of the present invention, in the LED line illumination brightness control method for controlling the brightness of the LED line light for the LED line illuminator that is arranged in a line form a plurality of LED channels grouped by LED for each channel, A line full brightness value tuning process, wherein the line light controller tunes a line overall brightness value such that the line overall brightness value of the LED line illuminator becomes a preset reference value; Calculating, by the line illumination controller, a brightness change rate for each channel to calculate a brightness change rate (%) for each channel when comparing the brightness of the LED channel with the brightness of the LED reference channel; And a channel-specific brightness control process of controlling the channel brightness by the line lighting controller as a value to which the brightness change rate of each channel is applied.

The brightness change rate calculation process for each channel may include: an LED reference channel setting process of setting, by the line illumination controller, any one LED channel among the LED channels in the LED line illuminator as an LED reference channel; A brightness deviation measuring step of measuring, by the line lighting controller, the brightness deviation between the LED reference channel and each LED channel for each LED channel; And converting, by the line illumination controller, a brightness change rate for each channel to convert the ratio of the brightness deviation of each LED channel to the brightness value of the LED reference channel as the brightness change rate (%) for each channel for each channel. have.

In the brightness control process for each channel, when the line illumination controller adjusts the overall brightness value of the line of the LED line illuminator by applying the brightness increase / decrease value requested by the user, the brightness change rate for each channel is applied from the brightness increase / decrease value. Each channel brightness can be controlled by the value.

According to the embodiment of the present invention, it is possible to detect the case where the lifetime of the LED in use is partially reached or the case where the amount of light is changed to control lighting.

1 is an illustration of an LED line illuminator.
2 shows each channel of an LED line illuminator.
3 is a block diagram of a LED line light brightness control system according to an embodiment of the present invention.
4 is an exemplary diagram showing a change rate of brightness for each channel according to an embodiment of the present invention.
5 is a flowchart showing the LED line illumination brightness control procedures according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and is provided to fully inform the scope of the invention to those skilled in the art. The invention is defined only by the scope of the claims. In addition, in the following description of the present invention, if it is determined that related related technologies and the like may obscure the gist of the present invention, detailed description thereof will be omitted.

3 is a configuration diagram of the LED line illumination brightness control system according to an embodiment of the present invention, Figure 4 is an exemplary view showing a change rate of brightness for each channel according to an embodiment of the present invention.

Dimming all channels of the LED line illuminator 100 (adjust the brightness of the light to the same brightness) is a method of changing the brightness of each LED channel is not easy to implement. There is usually a hassle to adjust the brightness of these channels and then tune the brightness of the entire channel again.

In order to solve this problem, the present invention, when tuning at a specific brightness, even if you adjust the brightness of the lights to be able to automatically and constantly adjust the entire channel constantly

To this end, the present invention tunes the entire channel to a constant brightness between channels once in a specific brightness portion in the lighting portion that can be adjusted brightness of a specific line light 0 ~ 255 levels. After tuning is finished, the brightness deviation between channels is calculated.

In applying calculations and channel changes, i) set any channel as the reference channel, calculate the amount of change between other channels relative to the reference channel, ii) store the changed channel in the program, and measure the amount of change relative to the reference channel. In terms of%, iii) the% of the changed channel compared to the reference channel is equally applied based on the amount of previously changed channel for each channel even if the overall channel brightness of the line illumination is changed. Hereinafter, the present invention will be described with reference to FIG. 3.

LED line illumination brightness system according to an embodiment of the present invention, as shown in Figure 3 includes an LED line illuminator 100 and a line illumination controller 200.

The LED line illuminator 100 is a lighting device in which a plurality of LED channels in which LEDs are grouped for each channel are arranged in a line and illuminated in a line form. That is, the plurality of LEDs 131 are mounted on the PCB substrate at regular intervals, the PCB substrate is formed to have a predetermined length, the plurality of LEDs are mounted on the PCB substrate, and the LEDs are arranged at predetermined intervals along the length direction. It is formed spaced apart.

It can also be formed in a line on a PCB substrate, furthermore, the LEDs can be arranged in a zigzag shape in both directions, or the PCB substrate is formed of a flexible member to form a constant gradient and have multiple rows on such PCB substrates. LEDs can be arranged to extend the range of irradiation.

Except for the parts where each LED is mounted on the PCB, the white light is coated using any one of Ag, Al2O3, TiO2, Al, PEN, PET, or a separate reflector is attached to reflect the light source when emitting each LED 131. You can also At this time, the LED can be used by mixing at least one or a plurality of light emitting diodes of red (R), green (G), blue (B) and white (W).

In particular, as shown in FIG. 4, the LEDs are grouped to form respective channels, and the LEDs belonging to each channel are controlled by the line lighting controller 200 as a channel unit.

The line illumination controller 200 tunes the entire line brightness value such that the overall line brightness value of the LED line illuminator 100 is a preset reference value. This tuning is to tune the entire channel to a constant brightness between channels once in a specific brightness part in an illumination part of which brightness of 0-255 brightness of a specific line light is adjustable.

After the tuning of the entire line brightness is completed, the deviation of the brightness between the channels is calculated. That is, the brightness change rate (%) for each channel is calculated for each channel when the brightness of the LED channel is compared with the brightness of the LED reference channel. In order for the line illumination controller 200 to calculate the brightness change rate (%) for each channel for each channel, first, the overall line brightness value of the LED line illuminator 100 is measured. Therefore, the overall brightness value of the line may correspond to the overall brightness value (luminance) of the LED line illuminator 100. For reference, the measurement of the overall brightness value of the line may be directly performed by providing a luminance sensor in the line lighting controller 200 or a separate brightness meter may be measured to measure the overall brightness value of the line.

After the measurement of the entire line brightness value, one of the LED channels in the LED channel in the LED line illuminator 100 is set as the LED reference channel, and the brightness deviation between the set LED reference channel and each LED channel for each LED channel By measuring, the ratio of the brightness deviation amount of each LED channel to the brightness value of the LED reference channel is converted into each channel as the brightness change rate (%) for each channel and stored. For example, when the LED third channel 10c, which is the third LED channel, is set as the LED reference channel, as shown in FIG. 4, when the brightness value of the reference channel is '100', when compared with the LED reference channel The brightness change rate of each channel of the LED first channel 10a becomes + 15%, and the brightness change rate of each channel of the LED second channel 10b becomes -20% when compared with the LED reference channel, and when compared with the LED reference channel. The brightness change rate of each channel of the LED fourth channel 10d will be + 5%, and the brightness change rate of each channel of the LED fifth channel 10e will be -5% as compared to the LED reference channel.

For reference, the storage device for storing the brightness change rate (%) for each channel includes a hard disk drive, a solid state drive, a flash memory, a compact flash card, and an SD. A module capable of inputting / outputting information such as a card (Secure Digital Card), an SM Card (Smart Media Card), an MMC Card (Multi-Media Card), or a Memory Stick, may be provided inside the device or may be provided separately. It may be provided in the apparatus.

Meanwhile, as described above, after calculating the brightness change rate (%) for each channel for each channel, each channel brightness is controlled as a value to which the brightness change rate for each channel is applied. That is, in the case where the overall line brightness value of the LED line illuminator 100 is adjusted by applying the brightness increase / decrease value requested by the user, the channel brightness is controlled by applying the brightness change rate for each channel in the brightness increase / decrease value. That is, the brightness control of each LED channel is determined by "brightness increase / decrease value + (brightness increase / decrease value x brightness change rate for each channel)".

For example, if the brightness increase / decrease value of the entire line brightness value is requested to increase the brightness in units of '+10', the channel brightness of the LED first channel 10a is " brightness increase / decrease value + (brightness increase / decrease value x LED). The brightness change rate of one channel) "=" (+10) + ((+10) × (+ 15%) "=" (+11.5) "The brightness of the second channel 10b of LEDs will be increased. The channel brightness is in the unit of "brightness increase value + (brightness increase value x brightness change rate of LED 2nd channel)" = "(+10) + ((+10) x (-20%)" = "(+8)" The brightness of the LED 4th channel 10d is increased, and the brightness of the LED 4th channel 10d is "brightness increase value + (brightness increase value × brightness change rate of LED 4th channel)" = "(+10) + ((+10) x ( + 5%) "=" (+10.5) "in brightness increments, and the channel brightness of the fifth LED channel 10e is" brightness increase value + (brightness increase value x brightness change rate of LED fifth channel) "= The brightness will be increased in units of "(+10) + ((+10) x (-5%)" = "(+9.5)".

As a result, even if the total channel brightness of the line illumination is changed to the percentage of the changed channel relative to the reference channel, the same amount is applied to each channel based on the amount of the previously changed channel.

5 is a flowchart illustrating the process of controlling LED line illumination brightness according to an embodiment of the present invention.

The LED line illumination brightness control method of the present invention for controlling the brightness of the LED line illumination for the LED line illuminator 100 is arranged in a line, the plurality of LED channels grouped by LED for each channel in a line form, As shown, the line light controller tunes the overall line brightness value so that the line light intensity of the LED line illuminator 100 is a preset reference value (S510), and the line light controller is connected to the LED channel. Channel brightness change rate calculation process (S520) for calculating the brightness change rate (%) for each channel when comparing the brightness with the brightness of the LED reference channel (S520), and the line brightness controller applies the brightness change rate for each channel. It may include a brightness control process (S530) for controlling the channel. This will be described in detail below.

The overall line brightness value tuning process (S510) is a process in which the line light controller tunes the line brightness value so that the line brightness value of the LED line illuminator 100 is a preset reference value.

The brightness change rate calculation process for each channel (S520) is a process in which the line lighting controller calculates the brightness change rate (%) for each channel when comparing the brightness of the LED channel with the brightness of the LED reference channel for each channel. This channel-specific brightness change rate calculation process (S520), the line reference controller is a LED reference channel setting process (S521) for setting any one LED channel of the LED channel in the LED line illuminator 100 as the LED reference channel, and the line illumination The brightness deviation measurement process in which the controller measures the brightness deviation between the LED reference channel and each LED channel for each LED channel (S522), and the brightness deviation amount of each LED channel compared to the brightness value of the LED reference channel by the line lighting controller It may include a process of converting the brightness change rate for each channel by converting the ratio as the brightness change rate (%) for each channel (S523).

The brightness control process for each channel (S530) is a process in which the line illumination controller controls the brightness of each channel as a value to which the brightness change rate for each channel is applied, and the overall brightness value of the line of the LED line illuminator 100 is requested by the user. In the case of adjusting by applying the brightness increase / decrease value, the brightness of each channel is controlled by applying the brightness change rate for each channel in the brightness increase / decrease value.

For example, as shown in FIG. 4, when the brightness value of the LED fourth channel 10d serving as the reference channel is '100', the LED first channel is compared with the LED third channel 10c serving as the LED reference channel. The brightness change rate of each channel of the channel 10a is calculated to be + 15%, and the brightness change rate of each channel of the LED second channel 10b is calculated to be -20% when compared to the LED third channel 10c, which is an LED reference channel. When compared with the LED third channel 10c, the LED reference channel, the brightness change rate of each channel of the LED fourth channel 10d is calculated as + 5%, and when compared with the LED third channel 10c, the LED reference channel, It is assumed that the brightness change rate of each channel of the fifth channel 10e is calculated as -5%.

In this case, the channel brightness of the LED first channel 10a is "brightness increase value + (brightness increase value x brightness change rate of LED first channel)" = "(+10) + ((+10) x (+15 %) "=" (+11.5) "in brightness increment control. Similarly, the channel brightness of the LED second channel 10b is" brightness increase value + (brightness increase value x brightness change rate of LED second channel) ". = "(+10) + ((+10) × (-20%)" = "(+8)" The brightness is increased in units, and the channel brightness of the LED fourth channel 10d is "brightness increase value + ( Brightness increase / decrease value × brightness change rate of 4th LED channel) "=" (+10) + ((+10) × (+ 5%) "=" (+10.5) "The brightness is increased in units of 5th LED ( Channel brightness of 10e) is " brightness increase / decrease value + (brightness increase / decrease value × brightness change rate of LED fifth channel) " = " (+ 10) + ((+10) × (-5%) " ) "Increases the brightness in units.

The embodiments in the above description of the present invention are presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, and the technical spirit of the present invention is not necessarily limited or limited only by the embodiments. However, various changes, modifications, and other equivalent embodiments may be made without departing from the technical spirit of the present invention.

100: LED line illuminator
200: line light controller

Claims (6)

An LED line illuminator in which a plurality of LED channels in which the LEDs are grouped for each channel are arranged in a line and illuminated in a line form; And
After tuning the overall line brightness value so that the overall line brightness value of the LED line illuminator becomes the preset reference value, calculate the brightness change rate (%) for each channel when comparing the brightness of the LED channel with the brightness of the LED reference channel. A line illumination controller controlling the brightness of each channel as a value to which the brightness change rate of each channel is applied;
LED line light brightness control system comprising a.
The method of claim 1, wherein the line lighting controller calculates the brightness change rate (%) for each channel for each channel,
Set any one LED channel among the LED channels in the LED line illuminator as the LED reference channel, and measure the brightness deviation between the set LED reference channel and each LED channel for each LED channel to prepare for the brightness value of the LED reference channel. LED line illumination brightness control system that converts the ratio of the brightness deviation of each LED channel as the brightness change rate (%) for each channel.
The method according to claim 2, wherein the line illumination controller is to control the brightness of each channel as a value to which the brightness change rate for each channel,
LED line illumination brightness control system for controlling the brightness of each channel by applying the brightness change rate for each channel from the brightness increase and decrease value when the overall line brightness value of the LED line illuminator is adjusted by applying the brightness increase value requested by the user .
In the LED line light brightness control method for controlling the brightness of the LED line light for the LED line illuminator in which a plurality of LED channels grouped with LEDs for each channel are arranged in a line and illuminated in a line form,
A line full brightness value tuning process, wherein the line light controller tunes a line overall brightness value such that the line overall brightness value of the LED line illuminator becomes a preset reference value;
Calculating, by the line illumination controller, a brightness change rate for each channel to calculate a brightness change rate (%) for each channel when comparing the brightness of the LED channel with the brightness of the LED reference channel; And
A brightness control process for each channel that the line illumination controller controls the brightness of each channel as a value to which the brightness change rate for each channel is applied;
LED line light brightness control method comprising a.
The method of claim 4, wherein the calculating of the brightness change rate for each channel comprises:
An LED reference channel setting process of setting, by the line lighting controller, any one LED channel among the LED channels in the LED line illuminator as an LED reference channel;
A brightness deviation measuring step of measuring, by the line lighting controller, the brightness deviation between the LED reference channel and each LED channel for each LED channel; And
A process of converting, by the line illumination controller, a brightness change rate conversion for each channel by converting a ratio of the brightness deviation of each LED channel relative to the brightness value of the LED reference channel as the brightness change rate (%) for each channel;
LED line light brightness control method comprising a.
The method of claim 4, wherein the brightness control process for each channel,
When the line illumination controller adjusts the overall brightness value of the line of the LED line illuminator by applying the brightness increase / decrease value requested by the user, controlling the brightness of each channel by using the brightness change rate for each channel in the brightness increase / decrease value. LED line light brightness control method.

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