TWM478225U - Bluetooth fixed frequency LED sign bar - Google Patents

Abstract

The present invention is a fixed frequency LED flash stick with a Bluetooth transmission using persistence of vision to show an image by a single-row LED display apparatus, and manually swing to the left and right or up and down with a fixed-frequency, and generates a planar graph/text image; swing frequency sensor uses three-axis G-sensor (accelerometer), which compared to conventional mechanical sensors, it's more accurately to determine the back swing position; Bluetooth unit is used to download graphics and text from a computer or mobile phone with Bluetooth equipment device; or the Bluetooth unit can be set to 1-to-multipoint master / slave mode, control multiple sticks by a single stick which sends messages to achieve simultaneous display of content.

Description

Fixed-frequency LED flashing fuel stick with blue bud

This creation is a fixed-frequency LED flashing fuel stick with blue buds, especially a three-axis G-sensor to detect the folding frequency of the hand swing. The blue bud download displays the LED text/graphics and is used in multiple rods. LED flashing fuel stick.

LED sticks that use visual persistence effects, such as China CN1728197 and Taiwan I384438, use the effect of persistence of vision, using a single row of LEDs to produce flat graphics and text, and for the content to be displayed, Both of them use the LED of the LED rod itself as an inductive device to scan. Although the photoelectric crystal is not used, it is inconvenient to use, and it is impossible to scan accurate graphic content, and the ADC (analog-to-digital converter) is required for use. The processor is costly. As for the traditional swing sensor, mechanical springs and ball switches are generally used. When the swing is large or the swing is up and down, the swing angle is too large and the gravity of the up and down swing is affected, so that the foldback point cannot be correctly judged and cannot be correct. The resulting led graphics. Both of these designs only consider a single LED rod, and it is not possible to connect multiple LED rods together to form a larger image content.

This creation is to solve the problem of the old products, to join the wireless Bluetooth function, directly By downloading the displayed graphics and timing from a computer or mobile phone with a Bluetooth device, you can accurately input the graphic to be displayed. The sway sensor also uses the three-axis G-sensor of MEMS technology to completely track the trajectory of the fuel rod and determine that the turning point is more accurate than the mechanical sensing device. The Bluetooth module can be downloaded from the computer, or it can be set to a one-to-many master/slave mode. A main flash stick controls other flash sticks to simultaneously display a larger area of graphic information.

11‧‧‧RF MCU

12‧‧‧Antenna

13‧‧‧LED array

14‧‧‧Three-axis G-sensor

15‧‧‧Power supply

21‧‧‧return point S1

22‧‧‧return point S2

301~313‧‧‧ Main program flow chart modules

41~49‧‧‧T0 interrupt program flow chart module

501~511‧‧‧T1 interrupt program flow chart module

Figure 1, the original hardware block diagram.

In Fig. 2, the creation is a schematic diagram of the relative turning point.

Figure 3, the flow chart of the main program of this creation.

Figure 4, this creation T0 interrupt program flow chart.

Figure 5, this creation T1 interrupt program flow chart.

The system block shown in Figure 1 includes an RF (radio frequency) function MCU (microcontroller) (11), LED array (13), power supply (15), three-axis G-sensor (acceleration sensor) (14), antenna (12). The MCU (11) includes the 2.4G wireless transceiver required by Bluetooth. The SIP (System In Package) technology is used to seal the wireless transceiver and the digital MCU in the same package. The antenna (12) is not required due to power requirements. High, so use PCB antennas to reduce costs. The LED array (13) includes 16 LEDs arranged in a single row controlled by the MCU. The three-axis G-sensor (14) is used to sense the swinging state of the fueling rod, and is used to determine the turning point of the swing to calculate the frequency of the swing so that The microcontroller (11) can determine the LED matrix pattern of the display according to the frequency of the swing and the relative foldback time. The power supply (15) section includes a battery and a three-terminal voltage regulator.

The focus of the software is on the judgment of the turning point when the hand is placed and how to calculate the time. The same swing position shows different LED matrix patterns, as shown in Figure 2S1 (21) is the leftmost position of the hand swing and S2 (22) is the rightmost position, and there are 16 LEDs arranged in a row on the stick, we must be three The value of the axis G-sensor is used to calculate the position of the current display bar from the position of S1 (21) to S2 (22) and the position of the current fuel bar relative to S1. For convenience, we use a separate interrupt program T1, fixed to read the value of the three-axis G-sensor (14) to determine whether it is currently at the turn-back point, and another interrupt program T0 fixed time to determine the current fuel stick relative to S1 ( 21), S2 (22) position to determine the current LED pattern to display 2D text/graphics with a 1D LED array for visual persistence. The following is a description of each program: the main program flow chart is shown in Figure 3: Start (301), initialize the MCU (302), and then the MCU reads the acceleration values on the X, Y, and Z axes when the three-axis G-SENSOR is stationary, and assigns them separately. Give x0, y0, z0 (303). Check the RF to see if there is any data to receive and update the operating mode and LED data (304). Then it is judged whether it is the stand-alone mode (305), if yes, the stand-alone mode is executed; otherwise, the multi-bar mode is executed. When the stand-alone mode is executed, the display LED data is first displayed (306), and then it is judged whether the currently displayed LED data is the same as the previous one (307), and the update is the currently displayed LED data (308), and the update is not required. . It is then determined whether the power switch is turned off (312), if so, it ends (313), otherwise it returns (304).

When the multi-rod mode is executed, it is first judged whether it is the MASTER mode (309). If the MASTER mode is executed, the MASTER takes out the LED data and issues a time signal for controlling the SLAVE (310). When the SLAVE mode is executed, according to MASTER time signal, take out different LED data (311). The LED data source is transmitted via Bluetooth (304). According to the transmitted data, we can know whether the working mode of the flash stick is single stick or MASTER (main) / SLAVE (slave) mode, in addition to LED moment The data displayed by the array includes a total of several pictures, the LED row and column values of each picture and the time of display of each picture. The time signal is provided by the system itself in stand-alone or MASTER mode. The time signal of SLAVE mode is provided by MASTER via wireless Bluetooth. The time of multiple SLAVE can be synchronized with MASTER.

After calculating the display LED data (306), we first judge whether the current LED data to be displayed is the same as the previous one (307), and update the displayed LED data (308). Then it is judged whether the power switch is turned off (312), and it ends (313), otherwise it returns to 304.

It is judged that the T0 interrupt program flow chart of the column of the display LED matrix is as shown in Fig. 4. First, it is judged whether it is a turn-back point (42), and it is a turn-back point, and it is judged whether it is a S1 turn-back point (42), not a turn-back point, and the program jumps to It is judged whether or not it moves from S1 to S2 (46). When it is a turn-back point, it is judged whether it is the S1 turn-back point (42). If it is the S1 turn-back point, the system time is assigned to s1_t and a column display time col_t(43) is calculated; if it is the S2 turn-back point, the system time is assigned to s2_t and calculated. A column shows the time col_t(44). Then calculate the time between S1 and S2 (45). Then it is judged whether to move from S1 to S2 (46), if yes, the calculation shows the column Col=(sys_t-s1_t)/col_t(47); No, the calculation shows the column Col=15-(sys_t-s2_t)/ Col_t(48). The timer T0 interrupt is then returned (49).

This creation has not been mentioned in similar products and literatures, it is a novel design; and it can be used in a great way and with the use of three-axis G-senser to accurately position and stabilize the picture, which is more advanced than current products; This creative implementation method has patent requirements and is filed in accordance with the law.

11‧‧‧RF MCU

12‧‧‧Antenna

13‧‧‧LED array

14‧‧‧Three-axis G-sensor

15‧‧‧Power supply

Claims (3)

A fixed-frequency LED flashing fuel stick with blue buds includes a Bluetooth-enabled microcontroller, LED array, power supply, three-axis G-sensor, antenna; a microcontroller connected to an LED matrix, a three-axis G-sensor, Antenna, power supply connected to the microcontroller, LED matrix, three-axis G-sensor. For example, the fixed-frequency LED flashing fuel stick with blue bud as described in the first paragraph of the patent application has a Bluetooth wireless transmission device, and can download the displayed graphic and text style from a device with a Bluetooth device such as a computer or a mobile phone; The Bluetooth device can also be set to a one-to-many master/slave mode. A single fueling rod can be used to send messages to other fueling rods to simultaneously display the flash word content of multiple fueling rods. The three-axis G-sensor is used to sense the swing state of the fuel stick, and is used to determine the swinging point of the swing to calculate the frequency of the swing, as in the case of the fixed-frequency LED flashing fuel stick with the blue bud as described in claim 1. Therefore, the microcontroller can determine the LED matrix pattern of the display according to the frequency of the swing and the relative turn-back time.