Light emitting device

Abstract

A light-emitting device comprises a flexible circuit board, a battery, a plurality of light-emitting diodes with predetermined colored light, a sensor and a control chip. Wherein the battery, the plurality of predetermined colored light emitting diodes, the sensor and the control chip are all arranged on the flexible circuit board, the sensor is used for detecting an external force to generate a control signal, and the control chip is connected with the sensor, the plurality of predetermined colored light emitting diodes and the battery. According to the light-emitting device, the flexible circuit board is used for sensing external force or vibration to emit light, an external circuit is not needed, the overall size is reduced, and the light-emitting device can be arranged on a detachable object and can be attached to a wearable object at will.

Description

Technical Field

[0001] The utility model relates to a light emitting device, in particular to a light emitting device which integrates a predetermined color light emitting diode, a sensor and a chip on a flexible circuit board. Background Art

[0002] With the continuous development of technology, people's demand for wearable devices is also increasing. Wearable devices can not only provide practical functions, but sometimes also become one of the accessories with decorative effects. For example, in recent years, light-emitting devices have been installed in shoes, so that shoes can not only be used to alert passers-by, but also as a decorative effect.

[0003] However, in conventional shoes with light-emitting functions, the light-emitting device is usually designed with a rigid circuit board, the battery and the controller are arranged on the rigid circuit board, and the predetermined color light-emitting diode (such as LED chip) is connected to the rigid circuit board using wires. The rigid circuit board needs to be packaged, so it is usually designed to be placed on the sole, but it also increases the weight of the shoe, takes up space, and is inconvenient to install. Once the conventional rigid circuit board is installed on the shoe, it is impossible to update a new light-emitting mode or make any adjustments.

[0004] When using a rigid circuit board for design, additional external wires are required to electrically connect multiple predetermined color LEDs to the rigid circuit board. However, when more light-emitting devices or multiple light-emitting modes are required, more external wires are required to meet the design requirements; further, if the predetermined color LEDs are to be placed in different positions, the required wire lengths are also different. All these problems not only lead to inconveniences in production and installation, but also greatly increase the weight of the shoes, which may affect the comfort and appearance of the shoes.

[0005] In addition, in conventional shoes with luminous functions, different predetermined color light-emitting diodes are usually used at the same time to emit different colors of light. For example, light-emitting components that emit red light, yellow light, yellow-green light, orange light, etc. (such as red light LED chips, yellow light LED chips, orange light LED chips) require a lower driving voltage or operating voltage Vf (such as 1.8.~2.4V); in contrast, light-emitting components that emit blue light (such as blue light LED chips) require a higher driving voltage or operating voltage Vf (such as 3V). When the red light-emitting component of the shoe emits light, the light-emitting device needs to output the driving voltage value required by the red light-emitting component. However, when switching to the blue light-emitting component to emit light, the light-emitting device needs to provide a higher voltage to drive the blue light LED chip, thereby causing the complexity of the power supply circuit design. On the other hand, when the red light LED chip with a low Vf voltage is lit, the battery voltage circuit is pulled down to the low Vf voltage of the red light LED chip. When the high Vf voltage blue light LED chip needs to be lit, the battery voltage circuit has not yet recovered to a sufficient voltage. Therefore, the high Vf voltage blue light LED chip will not light up, resulting in insufficient life.

[0006] Therefore, it is necessary to provide a light emitting device that can effectively reduce and lighten the circuit board and is easy to replace to solve the conventional problems. Utility Model Content

[0007] In view of this, the purpose of the utility model is to provide a light-emitting device with a simple structure, convenient operation and maintenance, effective energy reduction, lightweight circuit board, easy replacement, and effectively solving the problems of the prior art.

[0008] To achieve the above object, the utility model discloses a light emitting device, which is characterized by comprising:

[0009] A flexible printed circuit board;

[0010] a battery, disposed on the flexible printed circuit board;

[0011] A plurality of predetermined color light emitting diodes are disposed on the flexible circuit board and electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode and a second predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip; wherein the driving voltage of each predetermined color light emitting diode is the same or substantially the same;

[0012] A sensor is disposed on the flexible printed circuit board to detect an external force to generate a control signal; and

[0013] A control chip is arranged on the flexible circuit board. The control chip is electrically coupled to the sensor, the predetermined color light emitting diodes and the battery to receive the control signal generated by the sensor and drive the predetermined color light emitting diodes to emit light in a light emitting mode according to the control signal.

[0014] Among them, the light emitting color of the first predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode, and the light emitting color of the first predetermined color light emitting diode is a little pink, a little pink green, a little pink yellow, a little pink orange, a little pink emerald green, a little pink lemon green, a little pink purple, a little pink pink, a little pink ice blue or a little pink white; wherein the first light emitting diode chip and the second light emitting diode chip are both blue light diode chips, and the second light emitting diode chip is not covered with a fluorescent layer.

[0015] Among them, the multiple predetermined color light emitting diodes further include a third predetermined color light emitting diode, and the third predetermined color light emitting diode includes a third light emitting diode chip and a third phosphor layer covering it, wherein the light color of the third predetermined color light emitting diode is different from the light color of the second predetermined color light emitting diode.

[0016] Among them, the light emitting color of the first predetermined color light emitting diode is a little pink orange, a little pink emerald green, a little pink lemon green, a little pink purple, a little pink pink, a little pink ice blue or a little pink white; the second predetermined color light emitting diode further includes a second phosphor layer covering the second light emitting diode chip, and the light emitting color of the second predetermined color light emitting diode is a little pink orange, a little pink emerald green, a little pink lemon green, a little pink purple, a little pink pink, a little pink ice blue or a little pink white; wherein the first light emitting diode chip and the second light emitting diode chip are both blue light diode chips.

[0017] The plurality of predetermined color light emitting diodes are arranged on a first surface of the flexible circuit board, the battery is arranged on a second surface of the flexible circuit board corresponding to the first surface, and the flexible circuit board further includes a first connecting member and a second connecting member, the first connecting member is connected to a first electrode of the battery and bypasses a side wall of the battery, and the second connecting member is connected to a second electrode of the battery but does not bypass the side wall of the battery.

[0018] The flexible circuit board further includes a first connecting member and a second connecting member, one end of the first connecting member is welded to the first surface of the flexible circuit board, one end of the second connecting member is welded to the first surface of the flexible circuit board and passes through the flexible circuit board, a shell of the sensor is electrically connected to a first surface of the flexible circuit board, and an electrode of the sensor is electrically connected to the first surface or a second surface of the flexible circuit board.

[0019] The flexible circuit board includes a cavity, the sensor is arranged in the cavity, and the cavity width is smaller than the width of the sensor.

[0020] The maximum width of the flexible circuit board is the same as or greater than the diameter of the battery, and the battery is arranged on a second surface of the flexible circuit board corresponding to the first surface.

[0021] The light-emitting mode includes a sequential flashing mode, a simultaneous flashing mode, a back-and-forth flashing mode, an alternating flashing mode, a marquee flashing mode, a gradually brightening and dimming mode, or a gradually dimming and brightening mode.

[0022] A light emitting device is also disclosed, characterized in that it comprises:

[0023] a circuit board;

[0024] a battery, disposed on the circuit board;

[0025] A plurality of predetermined color light emitting diodes are electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode and a second predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip; the driving voltage of each predetermined color light emitting diode is the same or substantially the same;

[0026] A sensor is disposed on the circuit board to detect an external force to generate a control signal; and

[0027] A control chip is disposed on the circuit board, the control chip is electrically coupled to the sensor, the plurality of predetermined color light emitting diodes and the battery to receive the control signal generated by the sensor and drive the predetermined color light emitting diodes to emit light in a light emitting mode according to the control signal;

[0028] The light-emitting pattern includes a first light-emitting sequence and a second light-emitting sequence after the first light-emitting sequence. The first light-emitting sequence is that the multiple predetermined color light-emitting diodes emit light at a first flashing rate, and the second light-emitting sequence is that the multiple predetermined color light-emitting diodes emit light at a second flashing rate, and the second flashing rate is different from the first flashing rate.

[0029] The first LED chip and the second LED chip are both blue light diode chips, and the second LED chip is not covered with a phosphor layer.

[0030] Among them, the multiple predetermined color light emitting diodes further include a third predetermined color light emitting diode, the third predetermined color light emitting diode includes a third light emitting diode chip and a third phosphor layer covering it, the light emitting color of the third predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode, and the third light emitting diode chip is a blue light diode chip.

[0031] The first light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light in sequence at the first flashing rate; the second light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light in sequence at the second flashing rate, wherein the second flashing rate is a gradual frequency.

[0032] In the first light-emitting sequence, the light-emitting period of each predetermined color light-emitting diode is the same, and the light-emitting periods of two adjacent predetermined color light-emitting diodes are adjacent, or the light-emitting periods of two adjacent predetermined color light-emitting diodes include a non-lighting interval.

[0033] The first light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light N times in sequence at the first flashing rate; the second light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light simultaneously at the second flashing rate.

[0034] A light emitting device is also disclosed, characterized in that it comprises:

[0035] a circuit board;

[0036] A battery is disposed on the circuit board;

[0037] A plurality of predetermined color light emitting diodes are electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode and a second predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip; the driving voltage of each predetermined color light emitting diode is the same or substantially the same;

[0038] A sensor is disposed on the circuit board to detect an external force to generate a control signal;

[0039] a counting device for counting the number of times the sensor generates the control signal and selectively generating a counting signal; and

[0040] A control chip is disposed on the circuit board, and the control chip is electrically coupled to the sensor, the counting device, the plurality of predetermined color light emitting diodes and the battery;

[0041] The control chip includes a memory device for storing a plurality of light-emitting modes, so that the control chip selects a light-emitting mode from the plurality of light-emitting modes according to the control signal and the counting signal to drive the plurality of predetermined color light-emitting diodes to emit light.

[0042] The first LED chip and the second LED chip are both blue light diode chips, and the second LED chip is not covered with a phosphor layer.

[0043] Among them, the multiple predetermined color light emitting diodes further include a third predetermined color light emitting diode, the third predetermined color light emitting diode includes a third light emitting diode chip and a third phosphor layer covering it, the light emitting color of the third predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode, and the third light emitting diode chip is a blue light diode chip.

[0044] The plurality of light emitting modes include a sequential flashing mode, a simultaneous flashing mode, a back and forth flashing mode, an alternating flashing mode, a marquee flashing mode, a gradually brightening and dimming mode, or a gradually dimming and brightening mode.

[0045] A light emitting device is also disclosed, characterized in that it comprises:

[0046] a circuit board;

[0047] A battery is disposed on the circuit board;

[0048] A plurality of predetermined color light emitting diodes are electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode, a second predetermined color light emitting diode, and a third predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip, and the third predetermined color light emitting diode includes a third light emitting diode chip and a third phosphor layer covering the third light emitting diode; the driving voltage of each predetermined color light emitting diode is the same or substantially the same;

[0049] a sensor disposed on the circuit board to detect an external force to generate a control signal; and

[0050] A control chip is disposed on the circuit board, the control chip is electrically coupled to the sensor, the plurality of predetermined color light emitting diodes and the battery to receive the control signal generated by the sensor and drive the predetermined color light emitting diodes to emit light in a light emitting mode according to the control signal;

[0051] The light-emitting mode includes a first light-emitting sequence and a second light-emitting sequence after the first light-emitting sequence. The first light-emitting sequence is that the plurality of predetermined color light-emitting diodes flash in sequence at least once; the second light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light simultaneously at least once.

[0052] Among them, the second LED chip is not covered with a phosphor layer; the first LED chip, the second LED chip and the third LED chip are all blue light diode chips, and the light color of the first predetermined color light LED and the light color of the third predetermined color light LED are different from the light color of the second predetermined color light LED.

[0053] In summary, the utility model provides a light-emitting device with circuit lines in a flexible circuit board, which allows the battery, predetermined color light-emitting diode, sensor and control chip to be directly arranged on the surface of the flexible circuit board without external circuits, thereby greatly reducing the overall volume. In addition, the utility model can also provide multiple light-emitting modes without increasing the complexity of the circuit and adding external circuits, allowing the control chip to select the corresponding light-emitting mode according to the control signal detected by the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic structural diagram of a light emitting device according to a specific embodiment of the utility model is shown.

[0055] Figure 2 Shows the Figure 1 A structural schematic diagram of the light-emitting device at another viewing angle.

[0056] Figure 3 Shows the Figure 1 A structural schematic diagram of the light-emitting device at another viewing angle.

[0057] Figure 4 A structural schematic diagram of a light emitting device according to another specific embodiment of the utility model is shown.

[0058] Figure 5 Shows the Figure 4 A schematic cross-sectional view of the light-emitting device taken along section line AA.

[0059] Figure 6 Shows the Figure 4 A structural schematic diagram of the light-emitting device at another viewing angle.

[0060] Fig. 7A Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0061] Figure 7BShows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0062] Figure 7C Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0063] Fig.7D Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0064] Fig. 7E Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0065] Figure 7F Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0066] Figure 7G Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0067] Figure 7H Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes.

[0068] Figure 8 A schematic diagram of a wearable object with luminous function according to another specific embodiment of the present invention is shown. DETAILED DESCRIPTION

[0069] In order to make the advantages, spirit and features of the present invention easier and clearer to understand, the following will be described and discussed in detail with reference to the attached drawings and specific embodiments. It should be noted that these specific embodiments are only representative embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding specific embodiments. In addition, the components in the figure are only used to express their relative positions and are not drawn according to their actual proportions. The step numbers of the present invention are only used to separate different steps and do not represent the order of the steps, so it is necessary to explain them first.

[0070] Please also read Figure 1 as well as Figure 2 , Figure 1 The structure diagram of a light emitting device 1 according to a specific embodiment of the utility model is shown. Figure 2 Shows the Figure 1 A schematic diagram of the structure of the light-emitting device from another perspective. Figure 1 as well as Figure 2As shown, the light emitting device 1 of the present embodiment comprises a flexible circuit board 11 (length L; width W), a battery 12, a plurality of predetermined color light emitting diodes 131, 132, 133, 134, 135, 136, a sensor 14 and a control chip 15. The battery 12, the predetermined color light emitting diodes 131-136, the sensor 14 and the control chip 15 are all disposed on the flexible circuit board 11, and the width W of the flexible circuit board 11 is smaller than the width or diameter of the battery 12. The sensor 14 can be a motion sensor for detecting external force to generate a control signal. The control chip 15 is electrically connected to the battery 12, the predetermined color light emitting diodes 131-136 and the sensor 14 through the flexible circuit board 11. The control chip 15 selects a light emitting mode according to the control signal or sensing signal generated by the sensor 14 detecting the external force, and drives the predetermined color light emitting diodes 131-136 to emit light according to the selected light emitting mode.

[0071] In practice, the flexible circuit board of the present invention uses a flexible printed circuit board (FPCB), and the flexible circuit board is a double-sided board. Figure 1 , Figure 2 as well as Figure 3 , Figure 3 Shows the Figure 1 A schematic structural diagram of the light emitting device 1 at another viewing angle. Figure 2 As shown, the predetermined color light emitting diodes 131-136 and the sensor 14 are disposed on the first surface 111 of the flexible circuit board 11; Figure 3 As shown, the control chip 15 and the battery 12 can be arranged on the second surface 112 corresponding to the first surface. That is to say, when the light emitting device 1 of the utility model is arranged on the surface of any product, the first surface 111 can emit light outward; in addition, the control chip 15 and the battery 12 are arranged on the second surface 112 of the flexible circuit board 11, thereby saving space on the first surface 111 of the flexible circuit board 11, which is more conducive to the layout of the predetermined color light emitting diodes 131-136. Based on the above configuration, the predetermined color light emitting diodes may not be limited to Figures 1 to 3 Instead of being arranged in a single row, the light emitting device 1 can be arranged more flexibly (for example, in a staggered arrangement) to make the light emitted by the light emitting device 1 more variable.

[0072] In addition, the first surface 111 and the second surface 112 of the flexible circuit board 11 respectively include a plurality of circuit lines (not shown in the figure) flatly arranged on the flexible circuit board 11, so that the battery 12, the predetermined color light emitting diodes 131-136, the sensor 14, and the control chip 15 are electrically connected through the plurality of circuit lines. In the traditional rigid circuit board structure, the control chip 15 and the battery 12 are arranged on the rigid circuit board, and the predetermined color light emitting diode is arranged on the wearable object away from the rigid circuit board, so an additional external circuit is required to connect the predetermined color light emitting diode to the rigid circuit board. The utility model uses the flexible circuit board, and in the design process, the capacitance, inductance, characteristic impedance, etc. can be controlled to design the internal circuit line with the characteristics of the transmission line, so that the predetermined color light emitting diode, the control chip 15 and the battery 12 can be directly arranged on the surface of the flexible circuit board, and the predetermined color light emitting diodes at different positions on the flexible circuit board are matched to correspond to the positions of different wearable objects. Therefore, the flexible circuit board of the light emitting device of the present invention can simplify the overall circuit structure design, reduce external circuits, and reduce the overall volume.

[0073] In addition, if Figure 1 As shown, the flexible printed circuit board 11 may further include two sets of connecting components, one of which is a connecting component 161, one end of which is connected to the positive electrode of the battery 12 and the flexible printed circuit board 11; the other connecting component 162 is connected to the negative electrode of the battery 12 and the flexible printed circuit board 11, and the connecting components 161 and 162 are electrically coupled to the flexible printed circuit board 11. For example, one end of the connecting component 161 is connected or welded to the first surface 111 of the flexible printed circuit board 11, bypassing the side wall of the battery 12 and being welded to the positive electrode of the battery 12; one end of the connecting component 162 is connected or welded to the first surface 111 of the flexible printed circuit board 11, not bypassing the side wall of the battery 12 but being directly welded to the negative electrode of the battery 12, wherein the connecting component 162 may pass through the flexible printed circuit board 11. In practice, the battery may be a primary battery such as a carbon-zinc battery or an alkaline battery, or a rechargeable secondary battery or a rechargeable battery with a USB port may also be used.

[0074] Since the use of a flexible circuit board can effectively reduce the number of external circuits to reduce the overall volume, and can also adjust the overall size of the light-emitting device according to design requirements. In addition, the flexible circuit board of the utility model is not limited to the long strip shape of the aforementioned specific embodiment, and can also be in other shapes. The following provides another embodiment of the state, please refer to Figures 4 to 6 . Figure 4 A structural schematic diagram of a light emitting device 2 according to another specific embodiment of the utility model is shown. Figure 5 Shows the Figure 4 A schematic cross-sectional view of the light emitting device 2 taken along the AA section line. Figure 6 Shows the Figure 4 A schematic diagram of the structure of the light emitting device 2 from another viewing angle. Figures 4 to 6 As shown, the flexible circuit board 11 of the light emitting device 2 of the present embodiment may be circular, and further comprises a concave hole 17, and the sensor 14 is disposed in the concave hole 17. It is worth noting that the width of the concave hole 17 is smaller than the width of the sensor 14 (i.e., the diameter of the cylindrical sensor 14), so when the sensor 14 is accommodated in the concave hole 17, one side of the sensor 14 may be located in the hole 17, such as Figure 5 As shown. For example, when the width (diameter) of the sensor 14 is 1.96 mm, the width of the recess 17 can be 1.85 mm. In this specific embodiment, the predetermined color light emitting diode 131, the control chip 15 and the sensor 14 can be arranged on the front side (i.e., the first side) of the flexible circuit board 11, and the battery 12 can be arranged flatly on the back side (i.e., the second side) of the flexible circuit board 11, wherein the housing (negative electrode) and the positive electrode of the sensor 14 are electrically connected to the negative electrode and the positive electrode of the front side of the flexible circuit board 11 through welding, and the battery 12 can be connected to the negative electrode and the positive electrode of the flexible circuit board 11 through two connecting members as in the above specific embodiment. In addition, in practice, the maximum width of the flexible circuit board 11 can be the same as or greater than the diameter of the battery 12, for example, the flexible circuit board 11 covers the entire battery 12, so that the battery 12 cannot be seen from the first side of the flexible circuit board 11; or the length and width of the flexible circuit board 11 are the same as or greater than the diameter of the battery 12.

[0075] The predetermined color light emitting diodes 131-136 of the light emitting device 1 of this specific embodiment can be LED lights of different colors, such as pink, green, yellow, orange, emerald green, lemon green, purple, pink, ice blue, white, white, etc., but the LED lights of different colors have the same light emitting diode chip, such as a blue light emitting diode chip, and the surface of the blue light emitting diode is selectively coated with phosphors of different colors or proportions, and these phosphors will emit light of other colors after absorbing the blue light emitted by the blue light emitting diode. For example, a pink LED lamp is a blue light emitting diode chip coated with phosphors that produce pink light, a pink green LED lamp is a blue light emitting diode chip coated with phosphors that produce pink green light, and so on. As a result, the predetermined color light emitting diodes coated with phosphor layers in the light emitting device 1 can emit light of different colors. Since all predetermined color LEDs of the light emitting device 1 use the same LED chip (e.g., a blue LED chip), the driving voltage or operating voltage Vf required for all predetermined color LEDs to emit light is the same or substantially the same (e.g., even if the blue LED chip is the same, the driving voltage may have slight differences due to the manufacturing process. For example, when the intermediate value is 3V, the blue LED chip may have a difference in the range of plus or minus 1% to 5%, such as between 2.85V and 3.15V, between 2.9V and 3.1V, or between 2.97V and 3.03V). By the above technical means, even if several predetermined color LEDs in the light emitting device emit light of several different colors, the battery still continuously and stably outputs the same voltage, thereby extending the service life of the light emitting device. Of course, the predetermined color LEDs 131 to 136 of the light emitting device 1 of the specific embodiment may include at least one predetermined color LED that is a blue diode chip, but it is not covered with a phosphor layer, so the predetermined color LED emits blue light. For example, the predetermined color light emitting diodes 131 to 136 are respectively the first predetermined color light emitting diode 131, the second predetermined color light emitting diode 132, the third predetermined color light emitting diode 133, the fourth predetermined color light emitting diode 134, the fifth predetermined color light emitting diode 135 and the sixth predetermined color light emitting diode 136, wherein the first, third to sixth predetermined color light emitting diodes are all covered with a phosphor layer on their chips, and can emit light of other colors except blue light, while the second predetermined color light emitting diode chip is not covered with a phosphor layer, so the second predetermined color light emitting diode emits blue light. The conventional technology uses different light emitting diodes that can emit light of different colors to present different light color changes. When switching different color light emitting diodes to emit light, the battery also needs to switch the corresponding output voltage to drive the light emitting diode. When the switching is frequent, the battery voltage change speed is slower than the switching speed, which will cause the battery and the light emitting diode to have a reduced lifespan.Therefore, compared with the prior art, the light emitting device of the present invention has the advantage of longer service life.

[0076] In addition, the same light-emitting diodes with the same voltage output can greatly simplify the time cost of designing circuit boards. Furthermore, in addition to the aforementioned advantages of small size and long service life, the light-emitting device of the present invention also pre-stores multiple light-emitting modes in the control chip (such as in the memory of the control chip). Please also refer to Figure 2 , 7A to 7H . Fig. 7A Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Figure 7B Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Figure 7C Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Fig.7D Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Fig. 7E Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Figure 7F Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Figure 7G Shows the Figure 1 Schematic diagram of the light emitting modes of multiple predetermined color light emitting diodes. Figure 7H Shows the Figure 1 A schematic diagram of the light emitting modes of a plurality of predetermined color light emitting diodes. 7A to 7H The horizontal axis is the time axis, and the vertical axis is the serial numbers of the plurality of predetermined color light emitting diodes 131, 131, 132, 133, 134, 135, 136. Each square wave peak in each figure indicates that the predetermined color light emitting diode is emitting light. 7A to 7H Each of the figures depicts a lighting cycle of a lighting mode. In other embodiments, a plurality of predetermined color light emitting diodes may emit light at the trough of the square wave.

[0077] like Fig. 7A As shown, when the control chip selects the external force value detected by the sensor or the control signal generated by the sensor Fig. 7A When the light-emitting mode is set to , the control chip 15 drives the plurality of predetermined color light-emitting diodes 131 to 136 to emit light once in sequence, and then forms a light-emitting cycle and repeats the light-emitting cycle N times, where N is an integer greater than 0, to form a light-emitting mode with a sequential flashing effect. Furthermore, the flashing direction is not limited to this, such as Figure 7BAs shown, the control chip 15 drives the plurality of predetermined color light emitting diodes 131 to 136 to emit light once in sequence, and then the plurality of predetermined color light emitting diodes 136 to 131 to emit light once in sequence. Figure 2 From a viewing angle in the middle, multiple predetermined color light emitting diodes will be seen emitting light from right to left and then from left to right in a cycle to form a back-and-forth flashing light pattern, and the light emission cycle will be repeated N times subsequently, where N is an integer greater than 0.

[0078] In addition, in another embodiment, after the plurality of predetermined color light emitting diodes 131, 133, 132, 135, 134, 136 flash in the same order once or twice, the flashing length or flashing rate of the flashing again may be different from the flashing length or flashing rate of the previous flashing in order, so as to provide a visual effect of different flashing rates. For example, the flashing length of the subsequent flashing one or more times gradually becomes longer or shorter; or the flashing rate of the subsequent flashing one or more times may gradually increase or decrease.

[0079] Next, in addition to the above-mentioned flashing modes, other flashing modes can also be pre-stored in the control chip. Figure 7C As shown, the control chip 15 drives a plurality of predetermined color light emitting diodes 131-136 to emit light in the order of light emitting diodes 131, 133, 132, 135, 134, 136 to form a light-emitting cycle N times, where N is an integer greater than 0. However, the number of times and the order of each predetermined color light emitting diode are not limited thereto. For example, in another embodiment, a plurality of predetermined color light emitting diodes each emit light M times and emit light in the above order. When M is 2, after light emitting diode 131 emits light twice, light emitting diode 133 then emits light twice, and M is a natural number; in another embodiment, K predetermined color light emitting diodes emit light at the same time, and when K is 2, light emitting diodes 131 and 133 emit light at the same time, and K is a natural number less than or equal to the number of the plurality of predetermined color light emitting diodes.

[0080] In addition, the lighting mode can also be designed with different lighting durations according to needs, such as Fig.7D As shown, Fig.7D and Figure 7C The difference in the light emitting mode is that after the LED 136 finishes flashing at time t6, the LEDs 131, 133, 132, 135, 134, and 136 flash one or more times in the same order, but the flashing length or flashing rate from time t6 to t12 may be different from the previous flashing length or flashing rate, so as to provide a visual effect of different flashing rates. For example, the flashing length of the subsequent flashing one or more times gradually becomes longer or shorter; or the flashing rate of the subsequent flashing one or more times may gradually increase or decrease.

[0081] In addition to the above-mentioned alternating flashing mode and marquee flashing mode, the present invention provides other light-emitting modes, such as Fig. 7E As shown, the control chip first controls the predetermined color light emitting diodes 131~136 to emit light simultaneously once, and then controls each predetermined color light emitting diode to emit light in sequence at least once to form a light-emitting cycle, and repeats the light-emitting cycle N times, N is an integer greater than 0. In other embodiments, the control chip can control all the predetermined color light emitting diodes to emit light simultaneously L times, L is an integer greater than 0.

[0082] Furthermore, the lighting mode of the predetermined color light emitting diode may also include the control of the flashing brightness to achieve different visual effects. Figure 7F As shown, the control chip can control the predetermined color light emitting diode 131 to emit light to the brightest and then gradually dim, and the predetermined color light emitting diodes 132 to 136 also sequentially emit light in the same light emitting mode. Figure 7G As shown, the control chip can control the predetermined color light emitting diode 131 to gradually brighten to a brightness and maintain the brightness until it is turned off, and then the predetermined color light emitting diodes 132 to 136 also emit light in sequence according to the same light emitting mode. In addition, the above-mentioned light emitting mode with adjustable brightness to gradually brighten or dim can further change the light emitting order of the predetermined color light emitting diodes 131 to 136 at will according to user needs, or make the predetermined color light emitting diodes 131 to 136 emit light together in a gradually brighten or dim light emitting mode. In addition, the light emitting mode of a single predetermined color light emitting diode also includes a gradually brighten and dim light emitting mode. In detail, a predetermined color light emitting diode can gradually emit light to a brightness, then maintain the brightness for a period of time and then gradually dim.

[0083] In addition, the utility model further provides another light-emitting mode for adjusting brightness, such as Figure 7H As shown, the luminous brightness of the predetermined color light emitting diode 131 is S1, the luminous intensity of the predetermined color light emitting diode 132 is S2, the luminous brightness of the predetermined color light emitting diode 133 is S3, and the luminous brightness of the predetermined color light emitting diode 134 is S4. When the control chip controls the predetermined color light emitting diodes 131 to 134 to emit light in sequence, since the luminous brightness S4 is less than the luminous brightness S3 which is less than the luminous brightness S2 which is less than the luminous brightness S1, a visual effect can be generated in which the luminous brightness of each predetermined color light emitting diode is less than the luminous brightness of the previous predetermined color light emitting diode.

[0084] In summary, the user can store the above-mentioned sequential flashing mode, simultaneous flashing mode, back and forth flashing mode, alternating flashing mode, marquee flashing mode or a gradually brightening and dimming (or a gradually dimming and brightening) mode in the control chip according to needs, and no matter which light-emitting flashing mode is used, there can be a non-luminous gap between the light-emitting periods of any two adjacent predetermined color light-emitting diodes, or there can be no non-luminous gap between the light-emitting periods of any two predetermined color light-emitting diodes, or the light-emitting periods of any two predetermined color light-emitting diodes can be partially overlapped.

[0085] The sensor 14 can be a vibration sensor, a spring sensor, etc., which generates a control signal or a sensing signal when sensing an external force; the sensor 14 can also generate different control signals or sensing signals according to the size of the external force. In practical applications, the control chip can be further designed to store corresponding light patterns for different external force value ranges. For example, when the sensor senses a relatively small external force (such as a light touch by hand), the control chip selects the first type (such as the first sensing signal detected by the sensor) according to the first sensing signal detected by the sensor. Fig. 7A ) light emitting mode to drive multiple predetermined color light emitting diodes; when the sensor senses a greater force of knocking or a frequency with a larger vibration amplitude, the control chip selects a second mode (such as Figure 7B ) light-emitting mode to drive multiple predetermined color light-emitting diodes. The number, arrangement, color, and light-emitting mode of the predetermined color light-emitting diodes of the light-emitting device of the utility model are not limited to this, and users can design different types of light-emitting devices and light-emitting modes according to their own needs.

[0086] In another embodiment, the light emitting device of the utility model further includes a counting device (which can be located in the flexible circuit board or in the control chip), which can count the number of times the sensor 14 generates a control signal (or a sensing signal) and selectively generate a counting signal. The control chip selects a default light emitting mode from several light emitting modes stored in the memory to drive multiple predetermined color light emitting diodes according to the control signal generated by the sensor 14 and the counting signal generated by the counting device. The counting device has a certain number of digits, and it will be reset to zero and count again after exceeding it. For example, when the counting device is two-digit, the counting device does not generate a counting signal when the value of the counter is 0 and 1, and generates a counting signal when the value of the counting device is 2 and 3. If the counting device is three-digit, the counting device does not generate a counting signal when the value of the counting device is 0-2, and the first default counting signal is generated when the value of the counting device is 3-5, and the second default counting signal is generated when the value of the counting device is 6-7. The same applies to counting devices with other digits. When the control chip only receives a control signal but not a counting signal, the first default light-emitting mode is selected to drive a plurality of predetermined color light-emitting diodes; when the control chip receives a control signal and a first default counting signal, the second default light-emitting mode is selected to drive a plurality of predetermined color light-emitting diodes; when the control chip receives a control signal and a second default counting signal, the second default light-emitting mode is selected to drive a plurality of predetermined color light-emitting diodes.

[0087] In another embodiment, the light emitting device of the present invention further comprises a signal receiver disposed in the flexible circuit board or in the control chip. The user can connect the signal receiver of the present embodiment wirelessly or by wire through his own smart handheld device to transmit different flashing modes to the control chip and store them in the memory of the control chip.

[0088] In another embodiment, the light emitting device of the present invention further includes an ON / OFF switch disposed on the flexible circuit board. When the ON / OFF switch is turned off, the battery does not supply power. Therefore, regardless of whether the sensor 14 detects external force, the control chip will not drive the predetermined color light emitting diode to emit light. When the ON / OFF switch is turned on, the battery supplies power. Therefore, when the sensor 14 detects external force, the control chip will drive the predetermined color light emitting diode to emit light.

[0089] In another embodiment, the light-emitting device of the present invention further includes a selection switch disposed on the flexible circuit board, and different flashing modes can be switched each time the selection switch is pressed. When the first flashing mode is selected, when the sensor 14 detects external force, the control chip drives the predetermined color light emitting diode to emit light according to the first flashing mode.

[0090] The utility model provides another light-emitting device, including a sealed housing, a circuit board, a battery, a sensor, a plurality of predetermined color light-emitting diodes and a control chip. The battery, the circuit board, the sensor, and the control chip are located in the sealed housing, and the battery, the sensor, and the control chip are arranged on the circuit board. A wire set extends from the circuit board, passes through the sealed housing and is connected to the plurality of predetermined color light-emitting diodes. The sensor detects external force to generate a control signal. Each predetermined color light-emitting diode has the same light-emitting diode chip, but different light-emitting diode chips are coated with different phosphors on their surfaces. The phosphors absorb the light emitted by the light-emitting diode chip and convert it into light of other colors, and the driving voltage of each predetermined color light-emitting diode is the same. In practice, a blue light-emitting diode can be used as the light-emitting diode chip. The control chip is electrically connected to the sensor and the plurality of predetermined color light-emitting diodes. The control chip stores a light-emitting mode. The control chip receives the control signal generated by the sensor, and controls the plurality of predetermined color light-emitting diodes to emit light in the light-emitting mode according to the control signal. In actual applications, the light-emitting device of this specific embodiment can also be Figure 7A to Figure 7G The light-emitting modes are stored in the control chip, allowing the user to store the required light-emitting modes according to needs, and can also be combined with the above-mentioned different embodiments to emit light.

[0091] The utility model provides another light emitting device, comprising a sensor, a plurality of predetermined color light emitting diodes and a control chip. The difference between this embodiment and the above embodiment is that the control chip of this embodiment further stores a first light emitting sequence and a second light emitting sequence, and the control chip receives a control signal generated by the sensor, and drives the predetermined color light emitting diode to emit light at a fixed light emitting frequency according to the first light emitting sequence according to the control signal, and then emits light at a gradually changing frequency according to the second light emitting sequence.

[0092] In summary, the light-emitting device provided by the utility model integrates all components through a double-sided flexible circuit board, and can significantly reduce the size of the light-emitting device without the need for an external circuit design. In addition, the flexible circuit board has good elasticity, heat resistance and solderability, so it can be further integrated into wearable objects currently on the market. Figure 8 , Figure 8 FIG. 1 is a schematic diagram showing a wearable object E with a light-emitting function according to another specific embodiment of the present invention. Figure 8 As shown, in this specific embodiment, the wearable object E includes a wearable object body 3 (such as Figure 8The light emitting device 1 is a light emitting device comprising a pair of light emitting elements, a light emitting element 31 and a light emitting device 1 as shown. The light emitting device 1 can be fixed to the wearable object body 3 by a fastener (such as a tape, an adhesive layer or a rivet, etc.) 21, or can be connected in various ways. Further, the light emitting device 1 can be covered with a cover (not shown, such as a translucent plate or an outer cover with a preset pattern) on the light emitting device 1. In actual applications, when the sensor 14 detects the external force generated when the user walks or runs, the sensor 14 generates a control signal. Then, after receiving the control signal from the sensor, the control chip 15 selects a light emitting mode, and controls the battery 12 and the predetermined color light emitting diodes 131 to 136 to emit light according to the light emitting mode, and then displays the designed light emitting color and light flashing mode through the cover. It is worth noting that, due to the advantages of good elasticity and small size, the flexible circuit board can be arbitrarily set at different positions of the shoe (such as the tongue, upper, side of the sole, etc.) through the joints to achieve different decorative effects, and can even be set in the wearable object body with a softer and more easily deformable material surface, thereby replacing the disadvantage that the conventional hard circuit board cannot be used in a variety of applications. Please note that the other devices and functions in the light-emitting device of this specific embodiment are the same as the corresponding components of the aforementioned specific embodiment, so they are not repeated here. In another embodiment, the light-emitting device of the wearable object with light-emitting function includes the above-mentioned signal receiver. Allow the user to operate the light-emitting mode control chip 15 on the upper through the smart handheld device according to the use requirements.

[0093] In summary, the utility model provides a light-emitting device with circuit lines in a flexible circuit board, which allows the battery, predetermined color light-emitting diode, sensor and control chip to be directly arranged on the surface of the flexible circuit board without external circuits, thereby greatly reducing the overall volume. In addition, the utility model can also provide multiple light-emitting modes without increasing the complexity of the circuit and adding external circuits, allowing the control chip to select the corresponding light-emitting mode according to the control signal detected by the sensor.

[0094] The above detailed description of the preferred embodiments is intended to more clearly describe the features and spirit of the present invention, but is not intended to limit the scope of the present invention by the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the patent scope to be applied for by the present invention. Therefore, the scope of the patent scope applied for by the present invention should be interpreted in the broadest sense based on the above description, so as to cover all possible changes and arrangements with equivalents.

Claims

1. A light emitting device, characterized in that Include: A flexible printed circuit board; a battery, disposed on the flexible printed circuit board; A plurality of predetermined color light emitting diodes are disposed on the flexible circuit board and electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode and a second predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip; wherein the driving voltage of each predetermined color light emitting diode is the same or substantially the same; A sensor is disposed on the flexible printed circuit board to detect an external force to generate a control signal; and A control chip is arranged on the flexible circuit board. The control chip is electrically coupled to the sensor, the predetermined color light emitting diodes and the battery to receive the control signal generated by the sensor and drive the predetermined color light emitting diodes to emit light in a light emitting mode according to the control signal.

2. The light emitting device according to claim 1, characterized in that: The light emitting color of the first predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode. The light emitting color of the first predetermined color light emitting diode is pink, green, yellow, orange, emerald green, lemon green, purple, pink, ice blue or white. The first light emitting diode chip and the second light emitting diode chip are both blue light diode chips, and the second light emitting diode chip is not covered with a fluorescent layer.

3. The light emitting device according to claim 2, characterized in that: The plurality of predetermined color light emitting diodes further include a third predetermined color light emitting diode, which includes a third light emitting diode chip and a third phosphor layer covering the third light emitting diode, wherein the light emitting color of the third predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode.

4. The light emitting device according to claim 1, characterized in that: The light emitting color of the first predetermined color light emitting diode is a little pink orange, a little pink emerald green, a little pink lemon green, a little pink purple, a little pink pink, a little pink ice blue or a little pink white; the second predetermined color light emitting diode further includes a second phosphor layer covering the second light emitting diode chip, and the light emitting color of the second predetermined color light emitting diode is a little pink orange, a little pink emerald green, a little pink lemon green, a little pink purple, a little pink pink, a little pink ice blue or a little pink white; wherein the first light emitting diode chip and the second light emitting diode chip are both blue light diode chips.

5. The light emitting device according to claim 1, characterized in that: The plurality of predetermined color light emitting diodes are arranged on a first surface of the flexible circuit board, the battery is arranged on a second surface of the flexible circuit board corresponding to the first surface, the flexible circuit board further comprises a first connecting member and a second connecting member, the first connecting member is connected to a first electrode of the battery and bypasses a side wall of the battery, and the second connecting member is connected to a second electrode of the battery but does not bypass the side wall of the battery.

6. The light emitting device according to claim 1, characterized in that: The flexible circuit board further includes a first connecting component and a second connecting component, one end of the first connecting component is welded to a first surface of the flexible circuit board, one end of the second connecting component is welded to the first surface of the flexible circuit board and passes through the flexible circuit board, a shell of the sensor is electrically connected to the first surface of the flexible circuit board, and an electrode of the sensor is electrically connected to the first surface or a second surface of the flexible circuit board.

7. The light emitting device according to claim 6, characterized in that: The flexible circuit board comprises a concave hole, the sensor is arranged in the concave hole, and the width of the concave hole is smaller than the width of the sensor.

8. The light emitting device according to claim 1, characterized in that: The maximum width of the flexible circuit board is the same as or greater than the diameter of the battery, and the battery is arranged on a second surface of the flexible circuit board.

9. The light emitting device according to claim 1, characterized in that: The light-emitting mode includes a sequential flashing mode, a simultaneous flashing mode, a back-and-forth flashing mode, a alternating flashing mode, a marquee flashing mode, a gradually brightening and dimming mode, or a gradually dimming and brightening mode.

10. A light emitting device, characterized in that Include: a circuit board; a battery, disposed on the circuit board; A plurality of predetermined color light emitting diodes are electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode and a second predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip; the driving voltage of each predetermined color light emitting diode is the same or substantially the same; A sensor is disposed on the circuit board to detect an external force to generate a control signal; and A control chip is disposed on the circuit board, the control chip is electrically coupled to the sensor, the plurality of predetermined color light emitting diodes and the battery to receive the control signal generated by the sensor and drive the predetermined color light emitting diodes to emit light in a light emitting mode according to the control signal; The light-emitting pattern includes a first light-emitting sequence and a second light-emitting sequence after the first light-emitting sequence. The first light-emitting sequence is that the multiple predetermined color light-emitting diodes emit light at a first flashing rate, and the second light-emitting sequence is that the multiple predetermined color light-emitting diodes emit light at a second flashing rate, and the second flashing rate is different from the first flashing rate.

11. The light emitting device according to claim 10, characterized in that: The first LED chip and the second LED chip are both blue light diode chips, and the second LED chip is not covered with a phosphor layer.

12. The light emitting device according to claim 11, characterized in that: The plurality of predetermined color light emitting diodes further include a third predetermined color light emitting diode, which includes a third light emitting diode chip and a third phosphor layer covering the third light emitting diode. The light emitting color of the third predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode, and the third light emitting diode chip is a blue light diode chip.

13. The light emitting device according to claim 10, characterized in that: The first light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light in sequence at the first flashing rate; the second light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light in sequence at the second flashing rate, wherein the second flashing rate is a gradual frequency.

14. The light emitting device according to claim 13, characterized in that: In the first light-emitting sequence, the light-emitting period of each predetermined color LED is the same, and the light-emitting periods of two adjacent predetermined color LEDs are adjacent, or the light-emitting periods of two adjacent predetermined color LEDs include a non-lighting interval.

15. The light emitting device according to claim 10, characterized in that: The first light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light N times in sequence at the first flashing rate; the second light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light simultaneously at the second flashing rate.

16. A light emitting device, characterized in that Include: a circuit board; A battery is disposed on the circuit board; A plurality of predetermined color light emitting diodes are electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode and a second predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip; the driving voltage of each predetermined color light emitting diode is the same or substantially the same; A sensor is disposed on the circuit board to detect an external force to generate a control signal; a counting device for counting the number of times the sensor generates the control signal and selectively generating a counting signal; as well as A control chip is disposed on the circuit board, and the control chip is electrically coupled to the sensor, the counting device, the plurality of predetermined color light emitting diodes and the battery; The control chip includes a memory device for storing a plurality of light-emitting modes, so that the control chip selects a light-emitting mode from the plurality of light-emitting modes according to the control signal and the counting signal to drive the plurality of predetermined color light-emitting diodes to emit light.

17. The light emitting device according to claim 16, characterized in that: The first LED chip and the second LED chip are both blue light diode chips, and the second LED chip is not covered with a phosphor layer.

18. The light emitting device according to claim 17, characterized in that: The plurality of predetermined color light emitting diodes further include a third predetermined color light emitting diode, which includes a third light emitting diode chip and a third phosphor layer covering the third light emitting diode. The light emitting color of the third predetermined color light emitting diode is different from the light emitting color of the second predetermined color light emitting diode, and the third light emitting diode chip is a blue light diode chip.

19. The light emitting device according to claim 16, characterized in that: The plurality of light emitting modes include a sequential flashing mode, a simultaneous flashing mode, a back and forth flashing mode, an alternating flashing mode, a marquee flashing mode, a gradually brightening and dimming mode, or a gradually dimming and brightening mode.

20. A light emitting device, characterized in that Include: a circuit board; A battery is disposed on the circuit board; A plurality of predetermined color light emitting diodes are electrically coupled to the battery, the plurality of predetermined color light emitting diodes include a first predetermined color light emitting diode, a second predetermined color light emitting diode, and a third predetermined color light emitting diode, the first predetermined color light emitting diode includes a first light emitting diode chip and a first phosphor layer covering the first light emitting diode, the second predetermined color light emitting diode includes a second light emitting diode chip, and the third predetermined color light emitting diode includes a third light emitting diode chip and a third phosphor layer covering the third light emitting diode; the driving voltage of each predetermined color light emitting diode is the same or substantially the same; a sensor disposed on the circuit board to detect an external force to generate a control signal; and A control chip is disposed on the circuit board, the control chip is electrically coupled to the sensor, the plurality of predetermined color light emitting diodes and the battery to receive the control signal generated by the sensor and drive the predetermined color light emitting diodes to emit light in a light emitting mode according to the control signal; The light-emitting mode includes a first light-emitting sequence and a second light-emitting sequence after the first light-emitting sequence. The first light-emitting sequence is that the plurality of predetermined color light-emitting diodes flash in sequence at least once; the second light-emitting sequence is that the plurality of predetermined color light-emitting diodes emit light simultaneously at least once.

21. The light emitting device according to claim 20, characterized in that: The second LED chip is not covered with a phosphor layer; the first LED chip, the second LED chip and the third LED chip are all blue light diode chips, and the light color of the first predetermined color LED and the light color of the third predetermined color LED are different from the light color of the second predetermined color LED.

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