Light emitting module

Abstract

The present application relates to a light emitting module, which includes a first power supply wire, a second power supply wire and a light emitting device. The light emitting device includes M light emitting elements arranged in a column, M being an integer greater than 3. A first end of an Nth light emitting element of the light emitting device is connected to a first power supply node through the first power supply wire, and a second end of an (M-N+1)th light emitting element of the light emitting device is connected to a second power supply node through the second power supply wire. N is an integer greater than 1 but not greater than M / 2. By adjusting the positions of the first end point P1 and the second end point P2, the present application can reduce the brightness difference between adjacent light emitting elements, and can achieve the effect of optimizing the brightness uniformity of the light emitting device of the light emitting module.

Description

Technical Field

[0001] The present invention relates to a light-emitting module, and in particular to a light-emitting module capable of making light-emitting elements in the light-emitting module emit light uniformly. Background Art

[0002] With the popularity of personal computers, personal computers can be used in various environments, such as in low-light environments. In order to meet the needs of use in low-light environments, self-luminous keyboards are widely used. Traditional luminous keyboards are equipped with multiple light-emitting diodes to illuminate the keyboard with the light emitted by the light-emitting diodes. Figure 1 and Figure 2 , Figure 1 is an equivalent circuit diagram of a light emitting module 10 used in a traditional light emitting keyboard, and Figure 2 for Figure 1 The wiring diagram of the light-emitting module 10. The light-emitting module 10 includes a light-emitting device 110, and the light-emitting device 110 is coupled between a first power node VCC and a second power node GND. The first power node VCC is used to provide a positive voltage, and the second power node GND is used to be grounded. The light-emitting device 110 includes a plurality of light-emitting elements D1 to D15, and the light-emitting elements D1 to D15 are arranged in a row along a first direction X. Each light-emitting element D1 to D15 can be a light-emitting diode. The first terminal P1 and the second terminal P2 of the light-emitting device 110 are coupled to the first power node VCC and the second power node GND, respectively, wherein the first terminal P1 is the anode of the light-emitting element D1, the second terminal P2 is the cathode of the light-emitting element D15, and the resistance value between the anodes of two adjacent light-emitting elements and the resistance value between the cathodes of two adjacent light-emitting elements are both R. The light-emitting elements D1 to D15 are arranged Figure 2 On the film 21, there are conductive circuits 24, 25, 26 and 27 and contact pads 22 and 23 formed by printing technology. Among them, the contact pad 22 serves as the first power node VCC, and the contact pad 23 serves as the first power node GND. Among them, in order to save manufacturing costs, the contact pads 22 and 23 and the conductive circuits 24, 25, 26 and 27 are not copper circuits, but are formed by printing conductive paste (for example: silver paste) on the film 21. The conductive circuits 24, 25, 26 and 27 formed by the conductive paste all have resistance. Theoretically, if the resistance value between the anodes of two adjacent light-emitting elements and the resistance value between the cathodes of two adjacent light-emitting elements are both R, the current of each light-emitting component D1 to D15 will be equal. However, when the current of the light-emitting elements D1 to D15 is actually measured, there will be Figure 3 curve. Figure 3 for Figure 1The relationship between the light emitting elements D1 to D15 of the light emitting module 10 and the current flowing through each light emitting element D1 to D15 is shown in the figure. Since the internal resistance of the light emitting diode is not linear, the current flowing through each light emitting element is different, which makes the brightness of each light emitting diode different, thus causing the keyboard to illuminate unevenly. Figure 2 As shown, the current flowing through the light emitting elements D1 and D15 is the largest, while the current flowing through the light emitting element D8 is the smallest. Therefore, the brightness of the light emitting elements D1 and D15 is the largest, while the brightness of the light emitting element D8 is the smallest. Summary of the Invention

[0003] According to one aspect of the present invention, the present invention provides a light-emitting module, comprising:

[0004] At least one first power conductor connected to a first power node;

[0005] at least one second power conductor connected to a second power node; and

[0006] A plurality of light-emitting devices, each light-emitting device comprising:

[0007] A first terminal connected to the at least one first power conductor;

[0008] A second terminal connected to the at least one second power supply wire;

[0009] a third power supply wire connected to and passing through the first terminal;

[0010] a fourth power supply wire connected to and passing through the second terminal; and

[0011] M light-emitting elements are arranged in a row, a first end of each light-emitting element is connected to the third power wire, and a second end of each light-emitting element is connected to the fourth power wire, where M is an integer greater than 3;

[0012] wherein, starting from the first end point, passing through any light-emitting element from the Nth to the (M-N+1)th light-emitting element in the row to reach the second end point, the total length of the third power supply wire and the fourth power supply wire passed through is equal to the first total length, and N is an integer greater than 1 but not greater than M / 2;

[0013] wherein, starting from the first end point, passing through any one of the first and M-th light-emitting elements in the row to reach the second end point, the total length of the third power supply wire and the fourth power supply wire passed through is greater than the first total length; and

[0014] Wherein, starting from the first power node, passing through any single light-emitting device to reach the second power node, the total length of the at least one first power wire and the at least one second power wire passed through is equal, wherein the first power wire, the second power wire, the third power wire and the fourth power wire are conductive paste printed circuits.

[0015] As an optional technical solution, N is an integer greater than 2 but not greater than M / 2. Starting from the first endpoint, passing through any single light-emitting element from the first to (N-1)th and (M-N+2)th to Mth light-emitting elements in the column to reach the second endpoint, the total length of the third power conductor and the fourth power conductor passed through is greater than the first total length.

[0016] As an optional technical solution, the portions of the third power supply wire between the first endpoints of any two adjacent light-emitting elements in the same light-emitting device have equal lengths, and the portions of the fourth power supply wire between the second endpoints of any two adjacent light-emitting elements in the same light-emitting device have equal lengths.

[0017] As an optional technical solution, the first power supply node provides a first voltage, the second power supply node provides a second voltage, and the first voltage is higher than the second voltage.

[0018] As an optional technical solution, each light-emitting element is a light-emitting diode, the first end of each light-emitting element is its anode, and the second end of each light-emitting element is its cathode.

[0019] As an optional technical solution, the at least one first power conductor includes a plurality of first power conductors, and the at least one second power conductor includes a plurality of second power conductors.

[0020] As an optional technical solution, the first end of each light emitting device is connected to a corresponding first power wire of the plurality of first power wires, and the second end of each light emitting device is connected to a corresponding second power wire of the plurality of second power wires.

[0021] According to another aspect of the present invention, the present invention also provides another light-emitting module, comprising:

[0022] a first power supply wire, one end of which is connected to a first power supply node;

[0023] A second power supply wire, one end of which is connected to a second power supply node; and

[0024] A light-emitting device comprising:

[0025] a first terminal connected to the first power conductor;

[0026] a second terminal connected to the second power supply wire;

[0027] a third power supply wire connected to and passing through the first terminal;

[0028] a fourth power supply wire connected to and passing through the second terminal; and

[0029] M light-emitting elements are arranged in a row, a first end of each light-emitting element is connected to the third power wire, and a second end of each light-emitting element is connected to the fourth power wire, where M is an integer greater than 3;

[0030] wherein, starting from the first end point, passing through any light-emitting element from the Nth to the (M-N+1)th light-emitting element in the row to reach the second end point, the total length of the third power conductor and the fourth power conductor passed through is equal to the first total length, and N is an integer greater than 1 but not greater than M / 2; and

[0031] Wherein, starting from the first end point, passing through any one of the first and M-th light-emitting elements in the row to reach the second end point, the total length of the third power conductor and the fourth power conductor passed through is greater than the first total length, wherein the first power conductor, the second power conductor, the third power conductor and the fourth power conductor are conductive paste printed circuits.

[0032] As an optional technical solution, N is an integer greater than 2 but not greater than M / 2. Starting from the first endpoint, passing through any single light-emitting element from the first to (N-1)th and (M-N+2)th to Mth light-emitting elements in the column to reach the second endpoint, the total length of the third power conductor and the fourth power conductor passed through is greater than the first total length.

[0033] As an optional technical solution, the portion of the third power wire arranged between the first endpoints of any two adjacent light-emitting elements has equal length, and the portion of the fourth power wire arranged between the second endpoints of any two adjacent light-emitting elements has equal length.

[0034] In summary, the light-emitting device of the light-emitting module of any embodiment of the present invention includes M light-emitting elements arranged in a row. The first endpoint P1 of the light-emitting device is the first endpoint of the Nth light-emitting element, and the second endpoint P2 of the light-emitting device is the second endpoint of the (M-N+1)th light-emitting element. N is an integer greater than 1 but not greater than M / 2. By adjusting the positions of the first endpoint P1 and the second endpoint P2, the brightness difference between adjacent light-emitting elements can be reduced, thereby achieving the effect of optimizing the brightness uniformity of the light-emitting device of the light-emitting module.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is an equivalent circuit diagram of a light-emitting module used in a traditional light-emitting keyboard.

[0037] Figure 2 for Figure 1 Wiring diagram of the light emitting module.

[0038] Figure 3 for Figure 1 A diagram showing the relationship between the light-emitting elements of the light-emitting module and the current flowing through each light-emitting element.

[0039] Figure 4 FIG. 4 is an equivalent circuit diagram of a light-emitting module according to an embodiment of the present invention.

[0040] Figure 5 for Figure 4 A diagram showing the relationship between the light-emitting elements of the light-emitting module and the current flowing through each light-emitting element.

[0041] Figure 6 FIG. 4 is a schematic diagram of a light emitting module according to another embodiment of the present invention.

[0042] Figure 7 for Figure 6 Equivalent circuit diagram of the light-emitting module.

[0043] Figure 8 FIG. 4 is a schematic diagram of a light emitting module according to another embodiment of the present invention. DETAILED DESCRIPTION

[0044] Please refer to Figure 4 and Figure 5 , Figure 4 is an equivalent circuit diagram of the light emitting module 20 according to an embodiment of the present invention, and Figure 5 for Figure 4A diagram showing the relationship between each light-emitting element D1 to D15 of the light-emitting module 20 and the current flowing through each light-emitting element D1 to D15. The light-emitting module 20 includes a light-emitting device 210, which is coupled between a first power node VCC and a second power node GND. The voltage of the first power node VCC is higher than the voltage of the second power node GND. For example, the first power node VCC is used to provide a positive voltage, while the second power node GND is used for grounding, but the present invention is not limited to this. The light-emitting device 210 includes a plurality of light-emitting elements D1 to D15, which are arranged in a row along a first direction X. Each light-emitting element D1 to D15 can be a light-emitting diode. The first terminal P1 and the second terminal P2 of the light-emitting device 210 are coupled to the first power node VCC and the second power node GND, respectively (i.e., the first terminal P1 of the light-emitting device 210 is coupled to the first power node VCC, and the second terminal P2 is coupled to the second power node GND). The first terminal P1 is the anode of the light-emitting element D4, and the second terminal P2 is the cathode of the light-emitting element D12. The resistance between the anodes of two adjacent light-emitting elements and the resistance between the cathodes of two adjacent light-emitting elements are both R. Since the first terminal P1 and the second terminal P2 of the light-emitting device 210 are the anode of the light-emitting element D4 and the cathode of the light-emitting element D12, respectively, the current flowing through the light-emitting elements D4 and D12 is the largest, making the current of the light-emitting elements D1 to D15 of the light-emitting device 210 more evenly distributed than the current of the light-emitting elements D1 to D15 of the light-emitting device 110. Figure 5 As shown, the solid line 410 is used to represent the current flowing through each light emitting element D1 to D15 of the light emitting device 210, and the dotted line 420 is used to represent the current flowing through Figure 1 The current of each light emitting element D1 to D15 of the light emitting device 110 is Figure 1 The light emitting device 110, Figure 4 The currents of the light emitting elements D1 to D15 of the light emitting device 210 are more average. Figure 1 The light generated by the light emitting device 110 and the light emitting device 210 will be more uniform.

[0045] In addition to being the anode of the light-emitting element D4, the first terminal P1 of the light-emitting device 210 can also be the anode of the light-emitting element D2, D3, D5, D6, or D7; and in addition to being the cathode of the light-emitting element D12, the second terminal P2 of the light-emitting device 210 can also be the cathode of the light-emitting element D9, D10, D11, D13, or D14. In detail, the first terminal P1 of the light-emitting device 210 can be the anode of one of the light-emitting elements D2 to D7, and the second terminal P2 of the light-emitting device 210 can be the cathode of one of the light-emitting elements D9 to D14. When the positions of the first terminal P1 and the second terminal P2 meet the above conditions, the light generated by the light-emitting device 210 will be greater than Figure 1 Therefore, by adjusting the positions of the first endpoint P1 and the second endpoint P2, the brightness difference between adjacent light-emitting elements can be reduced, thereby achieving the effect of optimizing the brightness uniformity of the light-emitting device 210 of the light-emitting module 20.

[0046] Furthermore, if the light-emitting device of the light-emitting module of any embodiment of the present invention includes M light-emitting elements arranged in a row, and the first terminal P1 of the light-emitting device is the first terminal of the Nth light-emitting element, the second terminal P2 of the light-emitting device is the second terminal of the (M-N+1)th light-emitting element, and M is an integer greater than 3, then as long as N is an integer greater than 1 but not greater than M / 2, the light generated by the light-emitting device of the light-emitting module of the present invention can be made uniform. The first terminal P1 is the connection point of the light-emitting device connected to the first power supply node VCC via a power supply wire, and the second terminal P2 is the connection point of the light-emitting device connected to the second power supply node GND via a power supply wire. Therefore, M is at least 4, and N is at least 2. In other words, each light-emitting device of the light-emitting module of any embodiment of the present invention includes at least four light-emitting elements. In the case where the light-emitting device includes four light-emitting elements, the first terminal P1 can be the first terminal of the second light-emitting element (e.g., light-emitting element D2) of the light-emitting device, and the second terminal P2 of the light-emitting device is the second terminal of the third light-emitting element.

[0047] Please refer to Figure 6 and Figure 7 , Figure 6 is a schematic diagram of a light emitting module 30 according to another embodiment of the present invention, and Figure 7 for Figure 6FIG3 is an equivalent circuit diagram of the light-emitting module 30. The light-emitting module 30 includes a first power supply wire A, a second power supply wire B, a third power supply wire C, a fourth power supply wire D, and M light-emitting elements (e.g., light-emitting elements D1 to D15), where M is an integer greater than 3. For example, in this embodiment, M is equal to 15. The first power supply wire A is connected between the first power supply node VCC and the first terminal P1 of the light-emitting device 310, the second power supply wire B is connected between the second terminal P2 of the light-emitting device 310 and the second power supply node GND, the third power supply wire C is connected to and passes through the first terminal P1, and the fourth power supply wire D is connected to and passes through the second terminal P2. The light-emitting elements D1 to D15 are arranged in a row. Each light-emitting element D1 to D15 can be a light-emitting diode. The first end of each light-emitting element D1 to D15 is connected to the third power supply wire C, and the second end of each light-emitting element D1 to D15 is connected to the fourth power supply wire D. That is, in this embodiment, the anode of each light-emitting element D1 to D15 is connected to the third power conductor C, and the cathode of each light-emitting element D1 to D15 is connected to the fourth power conductor D. The third power conductor C and the fourth power conductor D have the same length, are made of the same material, and have the same resistance. In one embodiment of the present invention, the first power conductor A, the second power conductor B, the third power conductor C, and the fourth power conductor D are conductive paste printed circuits formed by printing a conductive paste (e.g., silver paste) on a film. The film may be made of polyethylene terephthalate (PET), polyimide (PI), or polyethylene terephthalate (PEN).

[0048] For convenience of explanation, in this embodiment, the first power supply wire A and the second power supply wire B are arranged in a manner of extending along a first direction X and a second direction Y, and the second direction Y may be perpendicular to the first direction X. The lengths of the first power supply wire A extending along the first direction X and the second direction Y are L and L respectively. A1 and L A2 The lengths of the second power supply wire B along the first direction X and the second direction Y are L and B1 and L B2 , and the equivalent resistance of the portion of the first power supply wire A extending in the first direction X is R A1 The equivalent resistance of the portion of the first power supply wire A extending in the second direction Y is R A2 The equivalent resistance of the portion of the second power supply wire B extending in the first direction X is R B1 The equivalent resistance of the portion of the second power supply wire B extending in the second direction Y is R B2In addition, in this embodiment, the portion of the third power supply wire C disposed between the first terminals of any two adjacent light emitting elements (i.e., the anodes of the light emitting diodes) and the portion of the fourth power supply wire D disposed between the second terminals of any two adjacent light emitting elements (i.e., the cathodes of the light emitting diodes) have equal lengths. Figure 6 For example, the length L C1 To L C14 and length L D1 To L D14 In contrast, the third power supply wire C disposed between the first terminals of any two adjacent light emitting elements (i.e., the anodes of the light emitting diodes) and the fourth power supply wire D disposed between the second terminals of any two adjacent light emitting elements (i.e., the cathodes of the light emitting diodes) have equal resistance values. Figure 7 For example, the resistance value R C1 to R C14 And the resistance value R D1 to R D14 All are equal.

[0049] Assuming that the total length of the third power conductor C and the fourth power conductor D passing through the first terminal P1 and reaching the second power node GND is equal to the first total length, the first total length will be equal to (L D4 +L D5 +L D6 +L D7 +L D8 +L D9 +L D10 +L D11 ). Due to the length L C1 To L C14 and length L D1 To L D14 =L1 = (L2) = (L3) = (L4) = (L5) = (L6) = (L7) = (L8) = (L9) = (L10) = (L11) = (L12) = (L2) = (L13) = (L14) = (L15) = (L16) = (L17) = (L18) = (L19) = (L21) = (L11) = (L12) = (L13) = (L14) = (L15) = (L16) = (L17) = (L18) = (L19) = (L1 ... C3 +L C2 +L C1 +L D1 +L D2 +L D3 +L D4 +L D5 +L D6 +L D7 +L D8 +LD9 +L D10 +L D11 ), and is greater than the first total length (L C3 +L C2 +L C1 +L D1 +L D2 +L D3 ), that is, starting from the first end point P1, passing through the first light emitting element D1 of the light emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through is 6L greater than the first total length mentioned above C1 Similarly, starting from the first end point P1, passing through the second light emitting element D2 of the light emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be greater than the first total length (L C3 +L C2 +L D2 +L D3 ), that is, starting from the first end point P1, passing through the second light emitting element D2 of the light emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be 4L greater than the first total length mentioned above C1 Starting from the first terminal P1, passing through the third light-emitting element D3 of the light-emitting device 310 and reaching the second terminal P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be greater than the first total length (L C3 +L D3 ), that is, starting from the first end point P1, passing through the third light-emitting element D3 of the light-emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be 2L greater than the first total length mentioned above C1 Starting from the first terminal P1, passing through the thirteenth light-emitting element D13 of the light-emitting device 310 and reaching the second terminal P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be greater than the first total length (L C12 +L D12 ), that is, starting from the first end point P1, passing through the thirteenth light-emitting element D13 of the light-emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through is 2L greater than the first total length mentioned above C1 Starting from the first terminal P1, passing through the fourteenth light-emitting element D14 of the light-emitting device 310 and reaching the second terminal P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be greater than the first total length (L C12 +L C13 +L D12 +L D13), that is, starting from the first end point P1, passing through the fourteenth light-emitting element D14 of the light-emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through is 4L greater than the first total length mentioned above. C1 Starting from the first terminal P1, passing through the fifteenth light-emitting element D15 of the light-emitting device 310 and reaching the second terminal P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be greater than the first total length (L C12 +L C13 +L C14 +L D14 +L D13 +L D12 ), that is, starting from the first end point P1, passing through the fifteenth light-emitting element D15 of the light-emitting device 310 and reaching the second end point P2, the total length of the third power supply wire C and the fourth power supply wire D passed through is 6L greater than the first total length mentioned above. C1 In short, starting from the first terminal P1, passing through any single light-emitting element among the first light-emitting element D1 to the third light-emitting element D3 and the thirteenth light-emitting element D13 to the fifteenth light-emitting element D15 of the light-emitting device 310 to reach the second terminal P2, the total length of the third power supply wire C and the fourth power supply wire D passed through is greater than the first total length mentioned above.

[0050] In summary, the light-emitting device of the light-emitting module of any embodiment of the present invention includes M light-emitting elements arranged in a row. The first terminal P1 of the light-emitting device is the first terminal (e.g., anode) of the Nth light-emitting element, and the second terminal P2 of the light-emitting device is the second terminal (e.g., cathode) of the (M-N+1)th light-emitting element. M is an integer greater than 3, and N is an integer greater than 1 but not greater than M / 2. In this architecture, assuming that the total length of the third power conductor C and the fourth power conductor D passed from the first terminal P1 through the Nth light-emitting element of the light-emitting device to the second power node GND is equal to the first total length. Therefore, the total length of the third power conductor C and the fourth power conductor D passed from the first terminal P1 through any of the (N+1)th to (M-N+1)th light-emitting elements of the light-emitting device to the second terminal P2 is equal to the first total length. In other words, starting from the first terminal P1, passing through any light-emitting element from the Nth to the (M-N+1)th light-emitting element of the light-emitting device to reach the second terminal P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be equal to the first total length. In addition, starting from the first terminal P1, passing through the first and Mth light-emitting elements of the light-emitting device (e.g., Figure 6The total length of the third power supply wire C and the fourth power supply wire D passed through by any single light emitting element (the light emitting elements D1 and D15) to reach the second terminal P2 is greater than the first total length.

[0051] Furthermore, if N is an integer greater than 2 but not greater than M / 2 (for example, N is 3 and M is 9), then starting from the first endpoint P1 and passing through any single light-emitting element from the first to the (N-1)th and (M-N+2)th to the Mth light-emitting elements of the light-emitting device to reach the second endpoint P2, the total length of the third power supply wire C and the fourth power supply wire D passed through will be greater than the above-mentioned first total length.

[0052] Please refer to Figure 8 , Figure 8 FIG1 is a schematic diagram of a light emitting module 40 according to another embodiment of the present invention. The light emitting module 40 includes a plurality of first power supply wires (in this embodiment, the plurality of first power supply wires are A1, A2 and A3), a plurality of second power supply wires (in this embodiment, the plurality of second power supply wires are B1, B2 and B3) and a plurality of light emitting devices 310. The circuit of each light emitting device 310 in the light emitting module 40 is connected to the circuit of the light emitting device 310. Figure 5 and Figure 6The light-emitting devices 310 are similar to those in FIG. Therefore, further description is omitted here. The first terminals P1 of the plurality of light-emitting devices 310 are connected to the first power node VCC via first power conductors A1, A2, and A3, respectively. The second terminals P2 of the plurality of light-emitting devices 310 are connected to the second power node GND via second power conductors B1, B2, and B3, respectively. The first power conductors A1, A2, and A3 are of the same length, made of the same material, and have the same resistance. The second power conductors B1, B2, and B3 are also of the same length, made of the same material, and have the same resistance. Therefore, starting from the first power node VCC, passing through any single light-emitting device 310 to reach the second power node GND, the total length of the corresponding first power conductor A1, A2, or A3 and the corresponding second power conductor B1, B2, or B3 is equal. In other words, the total length of the first power conductor A1 and the second power conductor B1 is equal to the total length of the first power conductor A2 and the second power conductor B2, and is also equal to the total length of the first power conductor A3 and the second power conductor B3. Because the distances between the first terminal P1 and the first power node VCC differ among the three light-emitting devices 310, the first power conductors A2 and A3 connected to the light-emitting device 310 closer to the first power node VCC can have winding structures 52 and 53, respectively, to ensure that the lengths of the first power conductors A2 and A3 are equal to the length of the first power conductor A1. Similarly, because the distances between the second terminal P2 and the second power node GND differ among the three light-emitting devices 310, the second power conductors B2 and B3 connected to the light-emitting device 310 closer to the second power node GND can have winding structures 62 and 63, respectively, to ensure that the lengths of the second power conductors B2 and B3 are equal to the length of the second power conductor B1.

[0053] In summary, the light-emitting device of the light-emitting module of any embodiment of the present invention includes M light-emitting elements arranged in a row. The first endpoint P1 of the light-emitting device is the first endpoint of the Nth light-emitting element, and the second endpoint P2 of the light-emitting device is the second endpoint of the (M-N+1)th light-emitting element. N is an integer greater than 1 but not greater than M / 2. By adjusting the positions of the first endpoint P1 and the second endpoint P2, the brightness difference between adjacent light-emitting elements can be reduced, thereby achieving the effect of optimizing the brightness uniformity of the light-emitting device of the light-emitting module.

[0054] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A light emitting module, characterized in that: Include: At least one first power conductor connected to a first power node; at least one second power conductor connected to a second power node; as well as A plurality of light-emitting devices, each light-emitting device comprising: A first terminal connected to the at least one first power conductor; A second terminal connected to the at least one second power supply wire; a third power supply wire connected to and passing through the first terminal; a fourth power supply wire connected to and passing through the second terminal; as well as M light-emitting elements are arranged in a row, a first end of each light-emitting element is connected to the third power wire, and a second end of each light-emitting element is connected to the fourth power wire, where M is an integer greater than 3; wherein, starting from the first end point, passing through any light-emitting element from the Nth to the (M-N+1)th light-emitting element in the row to reach the second end point, the total length of the third power supply wire and the fourth power supply wire passed through is equal to the first total length, and N is an integer greater than 1 but not greater than M / 2; wherein, starting from the first end point, passing through any one of the first and M-th light-emitting elements in the row to reach the second end point, the total length of the third power supply wire and the fourth power supply wire passed through is greater than the first total length; and Wherein, starting from the first power node, passing through any single light-emitting device to reach the second power node, the total length of the at least one first power wire and the at least one second power wire passed through is equal, wherein the first power wire, the second power wire, the third power wire and the fourth power wire are conductive paste printed circuits.

2. The light emitting module according to claim 1, wherein: N is an integer greater than 2 but not greater than M / 2. Starting from the first endpoint, passing through any single light-emitting element from the first to (N-1)th and (M-N+2)th to Mth light-emitting elements in the row to reach the second endpoint, the total length of the third power conductor and the fourth power conductor passed through is greater than the first total length.

3. The light emitting module according to claim 1, wherein: The portions of the third power wire between the first endpoints of any two adjacent light-emitting elements in the same light-emitting device have equal lengths, and the portions of the fourth power wire between the second endpoints of any two adjacent light-emitting elements in the same light-emitting device have equal lengths.

4. The light emitting module according to claim 1, wherein: The first power supply node provides a first voltage, the second power supply node provides a second voltage, and the first voltage is higher than the second voltage.

5. The light emitting module according to claim 4, characterized in that: Each light emitting element is a light emitting diode, the first end of each light emitting element is an anode thereof, and the second end of each light emitting element is a cathode thereof.

6. The light emitting module according to claim 1, wherein: The at least one first power conductor includes a plurality of first power conductors, and the at least one second power conductor includes a plurality of second power conductors.

7. The light emitting module according to claim 6, characterized in that: The first terminal of each light emitting device is connected to a corresponding first power wire of the plurality of first power wires, and the second terminal of each light emitting device is connected to a corresponding second power wire of the plurality of second power wires.

8. A light emitting module, characterized in that: Include: a first power supply wire, one end of which is connected to a first power supply node; a second power supply wire, one end of which is connected to a second power supply node; and A light-emitting device comprising: a first terminal connected to the first power conductor; a second terminal connected to the second power supply wire; a third power supply wire connected to and passing through the first terminal; a fourth power supply wire connected to and passing through the second terminal; as well as M light-emitting elements are arranged in a row, a first end of each light-emitting element is connected to the third power wire, and a second end of each light-emitting element is connected to the fourth power wire, where M is an integer greater than 3; wherein, starting from the first end point, passing through any light-emitting element from the Nth to the (M-N+1)th light-emitting element in the row to reach the second end point, the total length of the third power conductor and the fourth power conductor passed through is equal to the first total length, and N is an integer greater than 1 but not greater than M / 2; and Wherein, starting from the first end point, passing through any one of the first and M-th light-emitting elements in the row to reach the second end point, the total length of the third power conductor and the fourth power conductor passed through is greater than the first total length, wherein the first power conductor, the second power conductor, the third power conductor and the fourth power conductor are conductive paste printed circuits.

9. The light emitting module according to claim 8, characterized in that: N is an integer greater than 2 but not greater than M / 2. Starting from the first endpoint, passing through any single light-emitting element from the first to (N-1)th and (M-N+2)th to Mth light-emitting elements in the row to reach the second endpoint, the total length of the third power conductor and the fourth power conductor passed through is greater than the first total length.

10. The light emitting module according to claim 8, wherein: The portion of the third power supply wire disposed between the first endpoints of any two adjacent light emitting elements has an equal length, and the portion of the fourth power supply wire disposed between the second endpoints of any two adjacent light emitting elements has an equal length.

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