Bright spot flicker control system

Abstract

The utility model provides a bright spot flicker control system, comprising a main controller used for controlling the current of an adjustable constant current driver and an enabling switch so as to control the brightness and flicker frequency of a test lamp bead; and the adjustable constant-current driver is used for controlling the test lamp bead so as to realize color adjustability of the test lamp bead. According to the utility model, the brightness of the flash fusion test lamp bead can be adjusted: the LED lamp is lightened through the adjustable constant-current driver, the brightness of the lamp is controlled by using high-frequency PWM, and the brightness control precision is high; color adjustment of the flash fusion test lamp bead can be realized: through color adjustment of RGB LEDs, each color is controlled by an independent adjustable constant current driver, brightness of each color is controlled through PWM, and combination of multiple colors can be realized; the frequency change step length of light flashing is variable according to the rotating speed, so that the test time is effectively shortened, and the frequency control precision can be ensured; a photosensitive sensor is used for monitoring the brightness and the frequency of the lamp in real time, and the accuracy of the brightness and the frequency is ensured.

Description

Technical Field

[0001] This utility model relates to the field of human eye flash fusion testing technology, and in particular to a bright spot flashing control system. Background Technology

[0002] Currently, flash fusion testing equipment typically uses lamps of fixed brightness, which are not adjustable, and the lamp color is also fixed. The flash frequency is usually controlled by CPU delay, and there is no loop closure detection, resulting in low accuracy. This leads to inaccurate flash fusion threshold values ​​being obtained from the tests. This is because the human eye perceives different flash fusion threshold values ​​for lamps of different brightness and color.

[0003] Therefore, it is necessary to provide a new approach to solve the aforementioned technical problems. Utility Model Content

[0004] To achieve the above-mentioned objectives and other advantages of this utility model, the first objective of this utility model is to provide a bright spot flashing control system, comprising:

[0005] The main controller is used to control the current of the adjustable constant current driver and the enable switch to control the brightness and flashing frequency of the test LED.

[0006] The adjustable constant current driver is used to control the test LED beads so that the color of the test LED beads can be adjusted.

[0007] Furthermore, the main controller includes a PWM controller, which is connected to the current control terminal and enable switch of the adjustable constant current driver.

[0008] Furthermore, the test LED is an RGB LED, which includes R LEDs, G LEDs, and B LEDs.

[0009] Furthermore, the number of adjustable constant current drivers is three. The current control terminals and enable switches of the three adjustable constant current drivers are all connected to the PWM controller, and the output terminals of the three adjustable constant current drivers are respectively connected to the R LED, the G LED, and the B LED.

[0010] Furthermore, it also includes a photosensitive sensor, which is connected to the analog-to-digital converter of the main controller. The photosensitive sensor is installed on the side of the test LED and converts the light signal into an electrical signal and transmits it to the main controller to monitor the brightness and flicker frequency of the test LED in real time.

[0011] Furthermore, it also includes a rotary encoder, which is connected to the interrupt pin of the main controller and adjusts the step size by changing the frequency based on the rotation direction and rotation speed.

[0012] Furthermore, the rotary encoder uses an EC11 pulse rotary knob.

[0013] Furthermore, the main controller determines the rotation speed by the timing of two adjacent pulses of the EC11 pulse knob, and the timing of the two adjacent pulses is negatively correlated with the pulse adjustment step size.

[0014] Furthermore, the clockwise rotation of the EC11 pulse knob corresponds to an increase in frequency with a step size, and the counterclockwise rotation corresponds to a decrease in frequency with a step size.

[0015] Furthermore, the PWM controller is a 16-bit controller.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The brightness of the flash fusion test LED is adjustable: the LED is lit by an adjustable constant current driver, and the brightness of the LED is controlled by a high-frequency 16-bit PWM, which has high brightness control accuracy.

[0018] The color of the flash fusion test LED is adjustable: each color is controlled by an independent adjustable constant current driver through RGB LED color adjustment, and the brightness of each color is controlled by 16-bit PWM, which can achieve a variety of color combinations.

[0019] The frequency adjustment step size of the light flashing can be made variable according to the rotation speed: when the rotation speed is fast, the frequency adjustment step size is larger, and when the rotation speed is slow, the frequency adjustment step size is smaller, so as to achieve both rapid frequency adjustment, effectively reducing test time, and ensuring the accuracy of frequency control.

[0020] The flashing frequency of the lamp is achieved by a high-precision, low-frequency 16-bit hardware PWM.

[0021] A photosensitive sensor is used to monitor the brightness and frequency of the lamp in real time to ensure the accuracy of brightness and frequency.

[0022] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1Schematic diagram of the bright spot flashing control system;

[0025] Figure 2 Schematic diagram of the main controller;

[0026] Figure 3 Schematic diagram of an adjustable constant current driver;

[0027] Figure 4 This is a schematic diagram of a photosensitive sensor;

[0028] Figure 5 This is a schematic diagram of a rotary encoder;

[0029] Figure 6 Schematic diagram of a bright spot flashing control system. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0031] In the accompanying drawings, shapes and dimensions may be enlarged for clarity, and the same reference numerals will be used in all figures to indicate the same or similar parts.

[0032] In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, and lower are defined relative to the structure shown in the accompanying drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These are relative concepts and may vary depending on their location and usage. Therefore, these or other orientations should not be interpreted as restrictive terms.

[0033] Terms involving attachment, connection, etc. (e.g., “connection” and “attachment”) refer to the relationship in which these structures are directly or indirectly fixed or attached to each other through an intermediate structure, as well as movable or rigid attachments or relationships, unless otherwise explicitly stated.

[0034] In existing flash fusion measurement equipment, the brightness and color of the lights are fixed, the flash frequency is usually controlled by CPU delay, and there is no frequency lap feedback, resulting in low accuracy. However, the human eye perceives different flash fusion thresholds for different brightness and color lights.

[0035] This utility model provides a bright spot flashing control system that enables control over both the brightness and color of the light. The flashing frequency is controlled by hardware PWM, and feedback detection is added to the terminal output to ensure that the flashing frequency is completely consistent with the set frequency. The frequency adjustment knob adopts intelligent variable step size, which can effectively reduce the testing time and ensure the accuracy of the test.

[0036] Example 1

[0037] A bright spot flickering control system, such as Figure 1 , Figure 6 As shown, it includes:

[0038] The main controller 100 is used to control the current of the adjustable constant current driver 200 and the enable switch to control the brightness and flashing frequency of the test lamp 300.

[0039] The adjustable constant current driver 200 is used to control the test lamp 300 so that the color of the test lamp 300 can be adjusted.

[0040] In some embodiments, such as Figure 2 , Figure 6 As shown, the main controller 100 includes a PWM controller 110, which is connected to the current control terminal and enable switch of the adjustable constant current driver. The current is controlled by the duty cycle of the PWM. The larger the duty cycle, the larger the current; the smaller the duty cycle, the smaller the current.

[0041] Preferably, the PWM controller is a 16-bit controller, and the brightness can be divided into 65,535 levels.

[0042] In some embodiments, such as Figure 6 As shown, the test LED is an RGB LED, which includes RLED, GLED and BLED.

[0043] In some embodiments, the number of adjustable constant current drivers is three, and the three adjustable constant current drivers control the R, G, and B LEDs of the RGB LED respectively, thereby achieving color adjustment. Specifically, the current control terminals and enable switches of the three adjustable constant current drivers are all connected to the PWM controller, and the output terminals of the three adjustable constant current drivers are connected to the R LED, the G LED, and the B LED respectively.

[0044] like Figure 3 , Figure 6As shown, the adjustable constant current driver 200 includes a first adjustable constant current driver 210, a second adjustable constant current driver 220, and a third adjustable constant current driver 230. The current control terminal of the first adjustable constant current driver 210 is connected to the PWM-R0 pin of the PWM controller, the current control terminal of the second adjustable constant current driver 220 is connected to the PWM-G0 pin of the PWM controller, and the current control terminal of the third adjustable constant current driver 230 is connected to the PWM-B0 pin of the PWM controller. The PWM-R0, PWM-G0, and PWM-B0 pins of the PWM controller are used to control the current of the corresponding adjustable constant current drivers, thereby controlling the brightness of the corresponding lamps.

[0045] The enable switch of the first adjustable constant current driver 210 is connected to the PWM-R1 pin of the PWM controller, the enable switch of the second adjustable constant current driver 220 is connected to the PWM-G1 pin of the PWM controller, and the enable switch of the third adjustable constant current driver 230 is connected to the PWM-B1 pin of the PWM controller. The PWM-R1, PWM-G1, and PWM-B1 pins of the PWM controller are used to control the enable switch of the adjustable constant current controller to control the flashing frequency of the lamp.

[0046] In some embodiments, such as Figure 4 , Figure 6 As shown, it also includes a photosensor 300, which is connected to the analog-to-digital converter (ADC) of the main controller. The photosensor is mounted on the side of the test LED and is physically isolated from the outside world, only receiving the light emitted by the test LED. The photosensor converts the light signal into an electrical signal and transmits it to the main controller to monitor the brightness and flicker frequency of the test LED in real time.

[0047] In some embodiments, such as Figure 5 , Figure 6 As shown, it also includes a rotary encoder 400, which is connected to the interrupt pin (INT) of the main controller and adjusts the step size by changing the frequency by judging the rotation direction and rotation speed.

[0048] Preferably, the knob encoder is an EC11 pulse knob. Further, the main controller determines the rotation speed by the timing of two adjacent pulses from the EC11 pulse knob, the timing of which is negatively correlated with the pulse adjustment step size. Further, clockwise rotation of the EC11 pulse knob corresponds to a frequency that increases with the step size, and counterclockwise rotation corresponds to a frequency that decreases with the step size.

[0049] Specifically, the rotary encoder has two signal outputs. For each revolution, both signal pins emit 18 pulse signals. The phase difference between the two signals determines whether it rotates clockwise or counterclockwise. Clockwise rotation (forward rotation) corresponds to a frequency that increases by a step size, while counterclockwise rotation (reverse rotation) corresponds to a frequency that decreases by a step size. Both models are connected to the interrupt pin (INT) of the main controller.

[0050] The rotational speed of the knob is determined by detecting the time t between two adjacent pulses of one of the signals. For example, the adjustment step size of one pulse corresponding to the time t of two adjacent pulses is:

[0051] When t = < 80ms, the step size for one pulse adjustment is 0.7Hz;

[0052] 100ms >= t > 80ms, the step size of one pulse adjustment is 0.5Hz;

[0053] 120ms >= t > 100ms, the step size of one pulse adjustment is 0.3Hz;

[0054] For t>120ms, the step size of one pulse adjustment is 0.1Hz.

[0055] This invention drives RGB LEDs by controlling an adjustable constant current driver, enabling controllable brightness and color. The frequency is achieved through hardware PWM, resulting in high frequency output accuracy. Simultaneously, a photosensitive sensor monitors the brightness and frequency of the LEDs in real time, ensuring accuracy. The flashing frequency is adjusted by capturing signals from a rotary encoder, with a variable step size. The step size increases with faster rotation speed and decreases with slower rotation speed, thus achieving both rapid frequency adjustment, effectively reducing testing time, and ensuring precise frequency control.

[0056] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0057] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

[0058] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0060] The above description is merely an embodiment of this specification and is not intended to limit the scope of one or more embodiments of this specification. Various modifications and variations can be made to one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of one or more embodiments of this specification.

Claims

1. A bright spot flashing control system, characterized in that, include: The main controller is used to control the current of the adjustable constant current driver and the enable switch to control the brightness and flashing frequency of the test LED. The adjustable constant current driver is used to control the test LED beads so that the color of the test LED beads can be adjusted. The main controller includes a PWM controller, which is connected to the current control terminal and enable switch of the adjustable constant current driver. The test LED is an RGB LED, which includes R LED, G LED and B LED. The number of adjustable constant current drivers is three. The current control terminals and enable switches of the three adjustable constant current drivers are all connected to the PWM controller. The output terminals of the three adjustable constant current drivers are respectively connected to the R LED, the G LED, and the B LED. It also includes a rotary encoder, which is connected to the interrupt pin of the main controller and adjusts the step size by changing the frequency based on the rotation direction and rotation speed; The rotary encoder uses an EC11 pulse rotary knob; The main controller determines the rotation speed by the timing of two adjacent pulses from the EC11 pulse knob, and the timing of the two adjacent pulses is negatively correlated with the pulse adjustment step size. The clockwise rotation of the EC11 pulse knob corresponds to an increase in frequency with a step size, while the counterclockwise rotation corresponds to a decrease in frequency with a step size.

2. The bright spot flickering control system as described in claim 1, characterized in that: It also includes a photosensitive sensor, which is connected to the analog-to-digital converter of the main controller. The photosensitive sensor is installed on the side of the test LED and converts the light signal into an electrical signal and transmits it to the main controller to monitor the brightness and flicker frequency of the test LED in real time.

3. The bright spot flickering control system as described in claim 1, characterized in that: The PWM controller is a 16-bit controller.

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