Light emitting circuit structure for a light emitter

Abstract

This invention discloses a light-emitting circuit structure, comprising a first bottom line segment, a second bottom line segment, a first pad, a second pad, a diaphragm, and a light-emitting element. The first bottom line segment extends along the bottom line direction and includes a first bottom line end extending along the electrode connection direction. The bottom line direction and the electrode connection direction have a tolerance angle. The second bottom line segment includes a second bottom line end extending along the electrode connection direction. The first pad includes a connected first pad rear end and a first pad front end. The first pad rear end extends along the bottom line direction and connects to the first bottom line end. The first pad front end and the second pad front end do not include branch structures located on or around the orthographic projection of the light-emitting element. This invention utilizes branch structures at the overlap of the printed bottom line layer and the printed pad layer, so that even if the printed pad layer experiences printing misalignment during the manufacturing process, the first / second pad rear ends of the printed pad layer can still smoothly overlap and connect to the first / second bottom line ends of the printed bottom line layer.

Description

Technical Field

[0001] This invention relates to a light-emitting circuit structure for a light-emitting body, and more particularly to a light-emitting circuit structure that achieves fault tolerance in printing by utilizing the overlapping design of a printed base layer and a printed pad layer. Background Technology

[0002] In recent years, there has been an increasing demand for placing light-emitting elements on circuit boards, such as placing light-emitting elements on the circuit board of a keyboard, and turning on the light-emitting elements when the keys are pressed, thereby making them emit light.

[0003] Since most existing printed circuit boards are formed on an insulating substrate using an etching process, if a light-emitting element is to be placed on a printed circuit board, solder paste is usually used to connect the electrode pins of the light-emitting element to the metal lines on the circuit board. However, the soldering process requires a high-temperature furnace, which increases the manufacturing cost.

[0004] To address the high cost of using high-temperature furnaces for soldering light-emitting elements, existing technology has been improved by using conductive adhesive to bond the light-emitting element to the metal circuitry. Please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is a planar schematic diagram showing a prior art light-emitting circuit structure that uses conductive adhesive to bond the light-emitting element. (Example) Figure 1 As shown, a light-emitting circuit structure PA100 includes a printed base layer PA1 and a conductive adhesive layer PA2. The printed base layer PA1 includes a first printed circuit PA11 and a second printed circuit PA12. The conductive adhesive layer PA2 includes a first conductive adhesive PA21 and a second conductive adhesive PA22.

[0005] The first conductive adhesive PA21 is connected to the first printed circuit PA11, and the second conductive adhesive PA22 is connected to the second printed circuit PA12. In this way, the user can connect the first electrode PA201 and the second electrode PA202 of the light-emitting body PA200 to the first conductive adhesive PA21 and the second conductive adhesive PA22 respectively, so that the printed bottom layer PA1 can conduct light-emitting body PA200 through the conductive adhesive layer PA2.

[0006] Please continue reading. Figure 2 , Figure 2 A planar schematic diagram showing how the conductive adhesive of the prior art deviates from the printed base layer due to errors in printing and coating. (See diagram for example.) Figure 1As shown, although the conductive adhesive layer PA2 can conduct light-emitting element PA200 and printed base layer PA1, since the conductive adhesive layer PA2 is formed on the printed base layer PA1 by screen printing, in practice, the conductive adhesive layer PA2 is easily deviated from the original preset position of contacting the printed base layer PA1 due to printing and coating errors. Even if the light-emitting element PA200 can be accurately connected to the conductive adhesive layer PA2, it will not be electrically connected to the printed base layer PA1 through the conductive adhesive layer PA2 due to printing errors of the conductive adhesive layer PA2. Summary of the Invention

[0007] This invention proposes a light-emitting circuit structure for a light-emitting body, which achieves fault tolerance in printing by utilizing the overlapping design of the printed bottom layer and the printed pad layer.

[0008] An embodiment of the present invention provides a light-emitting circuit structure, comprising: a first bottom line segment, a second bottom line segment, a first contact pad, a second contact pad, a diaphragm, and a light emitter. The first bottom line segment extends along a bottom line direction and includes a first bottom line end extending along an electrode connection direction. The first bottom line end has a first length in the electrode connection direction and a fifth length in the same direction. The first length is substantially greater than the fifth length. The bottom line direction and the electrode connection direction have a tolerance angle, such that the first bottom line end on the first bottom line segment forms a branch structure. The second bottom line segment includes a second bottom line end extending along the electrode connection direction. The first contact pad includes a phase... The first pad has a connected rear end and a connected front end, the rear end of the first pad extending along the bottom line direction and connecting to the end of the first bottom line; the second pad has a connected rear end and a connected front end, the rear end of the second pad extending along the bottom line direction and connecting to the end of the second bottom line; the first bottom line segment, the second bottom line segment, the first pad, and the second pad are disposed on the diaphragm; the light emitter has a pair of electrodes, the electrode connection direction is defined according to the pair of electrodes, the pair of electrodes are electrically connected to the front end of the first pad and the front end of the second pad respectively, and the front end of the first pad and the front end of the second pad do not contain branch structures located on or around the orthographic projection of the light emitter.

[0009] In one embodiment, the first bottom line segment further includes a first bottom line lead, which extends along the bottom line direction, and the first bottom line end is integrally connected to the first bottom line lead to form a branch structure.

[0010] In one embodiment, the sixth length of the first pad as a whole in the bottom line direction is greater than the fifth length of the first bottom line end.

[0011] In one embodiment, the second bottom line segment has a second bottom line lead, which extends along the bottom line direction to form another branch structure with the end of the second bottom line.

[0012] In one embodiment, the second bottom line end has a second length in the direction of the electrode connection line and a seventh length in the direction of the bottom line line, the second length being substantially greater than the seventh length.

[0013] In another embodiment, the present invention also provides a light-emitting circuit structure, comprising: a first bottom line segment, a second bottom line segment, a first pad, a second pad, a diaphragm, and a light emitter. The first bottom line segment includes a first bottom line end extending along the bottom line direction, the first bottom line end having a first length in the electrode connection direction; the second bottom line segment includes a second bottom line end extending along the bottom line direction; the first pad includes a connected rear end and a front end of a first pad, the rear end of the first pad extending along the electrode connection direction and having a third length in the electrode connection direction, the third length being greater than the first length, and the rear end of the first pad being connected to the first bottom line end, wherein the bottom... The line direction has a tolerance angle with the electrode connection direction, so that the rear end of the first pad on the first pad forms a branch structure; the second pad includes a connected rear end and a front end of the second pad, the rear end of the second pad extends along the electrode connection direction and is connected to the end of the second bottom line; the first bottom line segment, the second bottom line segment, the first pad and the second pad are disposed on the diaphragm; the light emitter has a pair of electrodes, the electrode connection direction is defined according to the pair of electrodes, the pair of electrodes are electrically connected to the front end of the first pad and the front end of the second pad respectively, and the front end of the first pad and the front end of the second pad do not include branch structures located on or around the orthographic projection of the light emitter.

[0014] In one embodiment, the first pad further includes a first pad front end that extends along the bottom line direction, and the first pad rear end is integrally connected to the first pad front end to form a branch structure.

[0015] In one embodiment, the first pad and the second pad have the same shape but are arranged asymmetrically to each other.

[0016] In one embodiment, the front end of the first pad is integrally connected to the middle or end of the rear end of the first pad.

[0017] In one embodiment, the first bottom line end and the rear end of the first pad form a cross-shaped intersection.

[0018] In one embodiment, the light emitter, the front end of the first pad, and the front end of the second pad are all located between the first bottom line segment and the second bottom line segment.

[0019] In one embodiment, the sum of the lengths of the light emitter, the first pad, and the second pad in the direction of the electrode connection is greater than the distance between the first bottom line segment and the second bottom line segment.

[0020] In one embodiment, the front section of the first pad and the front section of the second pad are respectively perpendicular to the direction of the electrode connection line.

[0021] In one embodiment, the first bottom line segment further includes a first bottom line lead extending along the bottom line direction, and the second bottom line segment further includes a second bottom line lead extending along the bottom line direction. The first bottom line lead and the second bottom line lead are respectively spaced apart in the bottom line direction and / or the electrode connection direction.

[0022] In another embodiment, the present invention also provides a light-emitting circuit structure, comprising: at least one first bottom line segment, at least one second bottom line segment, at least one first pad, at least one second pad, a diaphragm, and at least one light emitter. The at least one first bottom line segment extends along an electrode connection direction and includes a first bottom line end, which extends along a bridging direction. The at least one second bottom line segment extends along the electrode connection direction and includes a second bottom line end. The at least one first pad includes a connected rear end and a front end, the rear end of which extends along the electrode connection direction and is connected to the first bottom line end. The bridging direction has a tolerance angle with the electrode connection direction, and a branch structure is formed at the junction of the first bottom line end and the rear end of the first pad; at least one second pad extends along the electrode extension direction and is connected to the second bottom line end; the first bottom line segment, the second bottom line segment, the first pad and the second pad are disposed on the diaphragm; at least one light emitter has at least one pair of electrodes, the electrode connection direction is defined according to the at least one pair of electrodes, and the at least one pair of electrodes of the light emitter are electrically connected to the first pad and the second pad respectively; wherein, the branch structure is not located in or around the orthographic projection of the light emitter, and the branch structure has the tolerance angle.

[0023] In one embodiment, the first bottom line end on the first bottom line segment extends along the bridging direction, and the rear end of the first pad extends along the electrode connection direction, together forming the branch structure.

[0024] In one embodiment, the first bottom line end has a first length in the direction of the electrode connection and a fifth length in the direction of the bottom line, wherein the first length is substantially greater than the fifth length.

[0025] In one embodiment, the two first bottom line ends extend along the bridging direction, and the two first pad rear ends extend along the electrode connection direction. The two first bottom line ends and the two first pad rear ends each constitute a branch structure.

[0026] In one embodiment, the sum of the lengths of the first pad and the second pad in the bridging direction is greater than the distance between the first bottom line segment and the second bottom line segment.

[0027] In one embodiment, the light emitter is disposed on the keycap projection on the diaphragm or in the peripheral gap of the keycap projection.

[0028] In one embodiment, the light emitter is located in the peripheral gap of the incident light projection / incident light projection.

[0029] In one embodiment, the projections of the first bottom line end and the second bottom line end in the direction of the electrode connection overlap each other.

[0030] In one embodiment, the present invention also provides a light-emitting circuit structure, comprising: N parallel first bottom line segments, N parallel second bottom line segments, N first pads, N second pads, and N parallel light emitters. The N first bottom line segments extend along the electrode connection direction and each includes a first bottom line end, where N is a positive integer greater than 2. The N parallel second bottom line segments extend along the electrode connection direction and each includes a second bottom line end. The N first pads each include a connected first pad rear end and a first pad front end, and each first pad rear end is connected to its corresponding first bottom line end, at least two of which are connected to the first bottom line ends. The first pad extends along the bridging direction and has the tolerance angle; N second pads each include a connected second pad rear end and a second pad front end, and each second pad rear end is connected to its corresponding second bottom line end; the first bottom line segments, the second bottom line segments, the first pads, and the second pads are disposed on the diaphragm; N parallel light emitters each provide different colors of light and each has a pair of electrodes defining the direction of the electrode connection, and the pair of electrodes of each light emitter are electrically connected to the corresponding first pad front end and the corresponding second pad front end; wherein, the branch structure is not located in or around the orthographic projection of the light emitter.

[0031] In another embodiment, the present invention also proposes a light-emitting circuit structure, which includes a first bottom line segment, a second bottom line segment, a first pad, a second pad, a diaphragm, and a light emitter. The first bottom line segment includes a first bottom line end extending along the electrode extension direction, the first bottom line end having a first length in the bridging direction; the second bottom line segment includes a second bottom line end extending along the electrode extension direction; the first pad includes a connected rear end and a front end of a first pad, the rear end of the first pad extending along the bridging direction and having a third length in the bridging direction, the third length being greater than the first length, and the rear end of the first pad being connected to the first bottom line end, wherein the electrode extension direction and the bridging direction have a tolerance angle, such that the first bottom line segment and the second bottom line end have a first bottom line end. A first pad has a branched structure at its rear end; a second pad includes a connected second pad rear end and a second pad front end, the second pad rear end extending along the bridging direction and connecting to the second bottom line end; the first bottom line segment, the second bottom line segment, the first pad, and the second pad are disposed on the diaphragm; the light emitter has a pair of electrodes, the electrode connection direction is defined according to the pair of electrodes, the pair of electrodes are electrically connected to the first pad front end and the second pad front end respectively, and the first pad front end and the second pad front end do not include branched structures located on or around the orthographic projection of the light emitter.

[0032] In another embodiment, the present invention also proposes a light-emitting circuit structure, comprising: at least one first bottom line segment extending along the electrode connection direction, each first bottom line segment including a first bottom line end extending along the electrode direction; at least one second bottom line segment extending along the electrode connection direction, each second bottom line segment including a second bottom line end; at least one first pad including a connected first pad rear end and a first pad front end, the first pad rear end extending along the electrode connection direction, and the first pad rear end further having a first pad rear branch extending along a bridging direction, the first pad rear branch overlapping the first bottom line end, wherein... The bridging direction has a tolerance angle with the electrode connection direction, and a branch structure is formed at the junction of the first bottom line end and the first pad. At least one second pad extends along the electrode extension direction and is connected to the second bottom line end. The first bottom line segment, the second bottom line segment, the first pad, and the second pad are disposed on the diaphragm. At least one light emitter has at least one pair of electrodes, and the electrode connection direction is defined according to the at least one pair of electrodes. The at least one pair of electrodes of the at least one light emitter are electrically connected to the first pad and the second pad respectively. The branch structure is not located in or around the orthographic projection of the light emitter, and the branch structure has the tolerance angle.

[0033] As described above, this invention utilizes a branch structure at the overlap of the printed base layer and the printed pad layer, ensuring that even if the printed pad layer experiences printing misalignment during the manufacturing process, the rear ends of the first / second pads of the printed pad layer can still smoothly overlap and connect to the first / second base end of the printed base layer. Furthermore, the aforementioned branch structure is not located in or around the orthogonal projection of the light-emitting element, reducing the orthogonal projection range of the light-emitting element and the circuit density around the light-emitting element, thereby improving the manufacturing yield of the light-emitting circuit structure.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0035] Figure 1 A planar schematic diagram showing the prior art light-emitting circuit structure that uses conductive adhesive to bond the light-emitting body;

[0036] Figure 2 A planar schematic diagram showing how the conductive adhesive of the prior art deviates from the printed bottom layer due to errors in printing and coating.

[0037] Figure 3 This is a plan view of the light-emitting circuit structure provided in the first preferred embodiment of the present invention;

[0038] Figure 4 A plan view showing the light-emitting circuit structure provided in the first preferred embodiment of the present invention, which increases the permissible printing range during the printing of the printed pad layer by means of a first bottom line end and a second bottom line end extending along a first direction;

[0039] Figure 5 This is a planar schematic diagram showing the application of the light-emitting circuit structure provided in the first preferred embodiment of the present invention to a keyboard module;

[0040] Figure 6 This shows a cross-sectional schematic diagram of the light-emitting circuit structure provided in the first preferred embodiment of the present invention applied to another keyboard module;

[0041] Figure 7 for Figure 6 Enlarged diagram of circle A;

[0042] Figure 8 A plan view showing the light-emitting circuit structure provided in the second preferred embodiment of the present invention;

[0043] Figure 9 A plan view showing the light-emitting circuit structure provided in the third preferred embodiment of the present invention;

[0044] Figure 10 A plan view showing the light-emitting circuit structure provided in the fourth preferred embodiment of the present invention;

[0045] Figure 11 A plan view showing the light-emitting circuit structure provided in the fifth preferred embodiment of the present invention;

[0046] Figure 12 A plan view showing the light-emitting circuit structure provided in the sixth preferred embodiment of the present invention;

[0047] Figure 13 This is a plan view of the light-emitting circuit structure provided in the seventh preferred embodiment of the present invention;

[0048] Figure 14 A plan view showing the light-emitting circuit structure provided in the eighth preferred embodiment of the present invention;

[0049] Figure 15 A plan view showing the light-emitting circuit structure provided in the ninth preferred embodiment of the present invention; and

[0050] Figure 16 This is a plan view of the light-emitting circuit structure provided in the tenth preferred embodiment of the present invention. Detailed Implementation

[0051] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0052] Please see Figure 3 , Figure 3 This is a plan view of the light-emitting circuit structure provided in the first preferred embodiment of the present invention. (See diagram below.) Figure 3 As shown, a backlight circuit structure 100 includes a printed base layer 1 and a printed pad layer 2. The printed base layer 1 and the printed pad layer 2 are sequentially printed on a film 101 to electrically connect a pair of positive and negative electrodes of a light-emitting element 200. The light-emitting element mentioned in the following embodiments of the present invention may be, for example, a pre-packaged light-emitting diode (LED) package or a bare LED die requiring further packaging processes. The embodiments of the present invention have been verified to improve the yield of micro-light-emitting elements such as MiniLEDs or MicroLEDs in the film printing process.

[0053] The printed bottom layer 1 includes a first bottom layer segment 11 and a second bottom layer segment 12, which can be implemented using a paste containing metal microflakes, such as silver paste or copper paste. The first bottom layer segment 11 includes a first bottom layer end 111 and a first bottom layer lead 112. In various embodiments of the present invention, three directions are defined: bottom layer direction Do, electrode connection direction De, and bridging direction Db. The bottom layer direction Do is the first bottom layer segment 11 (see...). Figure 3 and Figure 4 ), 11a~11g (see) Figures 8 to 14 ), 12g (see) Figure 14 ), 13g (see) Figure 14 ), 11h (see) Figure 15 and Figure 16 ), 12h (see Figure 15 and Figure 16 ), 13h (see) Figure 15 and Figure 16 The extension direction of the electrode connection De is the predetermined connection direction of the positive and negative electrodes of the light emitter 200, which can be parallel (or substantially parallel) to the bottom line direction Do (e.g. Figure 11 , Figure 14 , Figure 15 Or, not parallel to the bottom line direction (e.g., Do) Figure 3 , Figure 4 , Figure 8 , Figure 9 , Figure 10 , Figure 12 , Figure 13 When the electrode connection direction De is not parallel to the baseline direction Do, the electrode connection direction De and the baseline direction Do have a tolerance angle A between them. The tolerance angle A can be from 60 degrees to 120 degrees, and in some embodiments it may be close to 90 degrees. The bridging direction Db is a direction that is not parallel to the baseline direction Do.

[0054] Figure 3 In this design, the baseline direction Do is not parallel to the electrode connection direction De, but has a tolerance angle A. The first baseline end 111 extends along the electrode connection direction De, and the first baseline lead 112 extends along the baseline direction Do, and is integrally connected to the middle of the first baseline end 111 to form a T-shaped branch structure as a tolerance design. The first baseline end 111 has a first length d1 in the electrode connection direction De and a fifth length d5 ​​in the baseline direction Do. The first length d1 of the first baseline end 111 must be significantly greater than the fifth length d5 ​​or the width of the first baseline lead 112, for example, 1.5 times, 2 times, or 2.5 times or more, to achieve the printing tolerance effect and ensure that the branch structure does not extend into the light-emitting body 200 or even fall within the orthographic projection range of the light-emitting body 200.

[0055] The second bottom line segment 12 extends parallel to the first bottom line segment 11 along the bottom line direction Do, and the second bottom line segment 12 and the first bottom line segment 11 have a considerable distance between them in both the bottom line direction Do and the electrode connection direction De. The second bottom line segment 12 includes a second bottom line end 121 and a second bottom line lead 122. The second bottom line end 121 extends along the electrode connection direction De, and the second bottom line lead 122 extends along the bottom line direction Do and is integrally connected to the middle of the second bottom line end 121. Since the bottom line direction Do and the electrode connection direction De have a tolerance angle A, the first bottom line end 111 on the first bottom line segment 11 forms a T-shaped branch structure relative to the first lead bottom line 112 as a tolerance design; wherein, the second bottom line end 121 has a second length d2 in the electrode connection direction De and a seventh length d7 in the bottom line direction Do, and the second length d2 is considerably larger than the seventh length d7.

[0056] The printed pad layer 2 includes a first pad (rod-shaped) 21 and a second pad (rod-shaped) 22. The first pad 21 and the second pad 22 can also be made of a metal microparticle adhesive containing micron- or nano-sized gold, silver, copper, nickel, or combinations thereof. The conductivity of the printed pad layer 2 can be higher than that of the printed base layer 1. The first pad (rod-shaped) 21 includes a first pad rear end 211 and a first pad front end 212. The first pad rear end 211 extends along the base direction Do and overlaps with the middle of the first base end 111. The first pad rear end 211 has a third length d3 in the electrode connection direction De, which is less than the first length d1. The first pad 11 as a whole has a sixth length d6 in the base direction Do, which is greater than the fifth length d5.

[0057] The second pad (rod-shaped) 22 includes a second pad rear end 221 and a second pad front end 222. The second pad rear end 221 extends along the bottom line direction Do and overlaps with the middle of the second bottom line end 121. The second pad rear end 221 has a fourth length d4 in the electrode connection direction De, which is less than the second length d2. The second pad 12 as a whole has an eighth length d8 in the bottom line direction Do, which is greater than the seventh length d7. In principle, the first pad front ends 212, 212b, 212c, 212e, 212g, 232g, 212h, 232h or the second pad front ends 222, 222b, 222c, 222e, 242g, 262g in various embodiments of the present invention are all perpendicular to the electrode connection direction De. Figure 3In this embodiment, the first pad front end 212 or the second pad front end 222 extends along the bottom line direction Do. In principle, the first pad front ends 212, 212b, 212c, 212e, 212g, 232g, 212h, 232h or the second pad front ends 222, 222b, 222c, 222e, 242g, 262g in each embodiment of the present invention do not have branch structures, so as to improve the printing offset problem of the printed pad layer, while reducing the orthographic projection range of the light emitter 200 and the circuit density around the light emitter 200, improving the process yield, and avoiding the circuit layout limiting the relative position of the light emitter 200 and the corresponding light-emitting keycap.

[0058] As described above, the rear end 211 of the first pad (rod-shaped) 21 is superimposed on the first electrode of the light emitter 200 (the circular dashed line on the left inside the light emitter 200 in the figure), and the rear end 221 of the second pad (rod-shaped) 22 is superimposed on the second electrode of the light emitter 200 (the circular dashed line on the right inside the light emitter 200 in the figure), thereby forming an electrical connection so that the circuit connected by the first baseline segment 11 and the second baseline segment 12 can conduct the light emitter 200. The light-emitting circuit structure 100 is, for example, formed by printing the circuit of the printed baseline layer 1 on the film 101 by printing, and then coating the film 101 and the printed baseline layer 1 by screen printing to form a printed pad layer 2 partially on the printed baseline layer 1. The film 101 can be made of, for example, PE (polyethylene), PC (polycarbonate), PP (polypropylene), PI (polyimide), PVC (polyvinyl chloride), and PET (polyethylene terephthalate) or other polymer film plastics. Furthermore, the printed pad layer 2 and the light-emitting element 200 can still be electrically connected using solder paste, which can be, for example, made of tin-bismuth alloy, tin-silver-copper alloy or a combination thereof.

[0059] Please continue reading. Figure 4 The diagram shows a plan view of the light-emitting circuit structure provided in the first preferred embodiment of the present invention, which increases the permissible printing range of the printed pad layer 2 by means of a first bottom line end 111 and a second bottom line end 121 extending along the electrode connection direction De.

[0060] like Figure 3 and Figure 4As shown, since both the first bottom wire end 111 and the second bottom wire end 121 extend along the electrode connection direction De, and respectively have a first length d1 greater than the third length d3 of the first pad rear end 211 and a second length d2 greater than the fourth length d4 of the second pad rear end 221, when the first pad rear end 211 and the second pad rear end 221 are printed and coated with the middle of the first bottom wire end 111 and the second bottom wire end 121 respectively, even if they deviate from the first bottom wire end 111 and the second bottom wire end 121 due to process errors... In the middle of 21, the first pad rear end 211 and the second pad rear end 221 can also be formed on the first bottom line end 111 and the second bottom line end 121 respectively within the range of the first length d1 and the third length d3. That is, the design of the first bottom line end 111 and the second bottom line end 121 extending along the electrode connection direction De can effectively improve the allowable error range of the printed pad layer 2 in the printing process, thereby effectively preventing the printed pad layer 2 from failing to contact the printed bottom line layer 1 due to errors, and relatively improving the manufacturing yield of the light-emitting circuit structure 100.

[0061] Furthermore, since the first pad rear end 211 and the second pad rear end 221 have a sixth length d6 that is greater than the fifth length d5 ​​of the first bottom line end 111 and an eighth length d8 that is greater than the seventh length d7 of the second bottom line end 121 respectively in the bottom line direction Do, the first pad rear end 211 and the second pad rear end 221 can be effectively used as extensions of the first bottom line end 111 and the second bottom line end 121 respectively for the light emitter 200 to be subsequently installed.

[0062] Please continue reading. Figure 5 , Figure 5 This is a planar schematic diagram showing the light-emitting circuit structure provided in the first preferred embodiment of the present invention applied to a keyboard module. (See diagram below.) Figure 3 and Figure 5 As shown, the light-emitting circuit structure 100 of the present invention can be practically applied to electronic devices such as keyboard modules 300. The keyboard module 300 includes a circuit film 301, a keyboard base frame 302, keycaps 303, and key assemblies 304 (see reference). Figure 6 The keycaps 303 are connected to the keyboard bottom frame 302 via the key assembly 304. The circuit membrane 301 can be positioned above or below the keyboard bottom frame 302. The circuit membrane 301 has membrane switches (not shown) corresponding to each keycap 303, and these membrane switches are interconnected to form a key circuit. When the membrane switches on the circuit membrane 301 are triggered as the keycap 303 is pressed down, a corresponding key signal is generated. The backlight circuit structure 100 and its diaphragm 101, which act as backlight, are located below the keyboard bottom frame 302 of the keyboard module 300.

[0063] In addition, the circuit film 301 is also provided with a first circuit 1011 and a second circuit 1012. The first circuit 1011 is turned on when a key is pressed. The first ground wire 112 and the second ground wire 122 of the light-emitting circuit structure 100 are electrically connected to the first circuit 1011 and the second circuit 1012, respectively. Thus, when a key is pressed, the first circuit 1011 is turned on, sending a key signal. This allows current to pass through the light-emitting circuit structure 100 to the light-emitting body 200, causing the light-emitting body 200 to emit light. It should be noted that since the light emitted by the light-emitting body 200 must pass through the perforation 3021 of the keyboard bottom frame 302, the circuit gaps on the circuit film 301, and be refracted or reflected by the key assembly 304 before passing through the keycap 303, to achieve the best key top illumination effect, there should not be a complex circuit design around the light-emitting body 200, so as not to limit the placement of the light-emitting body 200, and also to avoid overflow, padding, short circuit problems that may occur in the printing process, affecting the process yield. Therefore, neither the first pad (rod-shaped) 21 nor the second pad (rod-shaped) 22 of the printed pad layer 2 should have T-shaped or L-shaped bends (or branch structures) and / or enlarged areas in the overlapping portion with the orthographic projection of the light-emitting element 200 or around the light-emitting element. In other words, only the first bottom edge end 111 and the second bottom edge end 121 of the printed bottom edge layer 1, and the first pad rear end 211 of the first pad (rod-shaped) 21 and the second pad rear end 221 of the second pad (rod-shaped) 22 of the printed pad layer 2 are suitable for setting branch structures such as T-shaped or L-shaped bends for fault tolerance design; on the other hand, adding additional circuit structures to the first pad front end 212 of the first pad (rod-shaped) 21 or the second pad front end 222 of the second pad (rod-shaped) 22 may reduce yield and limit the position of the light-emitting element, and is not suitable for setting branch structures. Therefore, the first pad front end 212 and the second pad front end 222 do not contain branch structures located in or around the orthographic projection of the light-emitting element 200. Similarly, the first length d1 of the first bottom line end 111 is preferably several times greater than the fifth length d5 ​​(e.g., more than 3 times), and the second length d2 of the second bottom line end 121 is preferably several times greater than the seventh length d7. The smaller fifth length d5 ​​and seventh length d7 can prevent the branch structure from being close to the light source 200 or even located within the orthographic projection range of the light source 200.

[0064] Please continue reading. Figure 6 and Figure 7 , Figure 6 This shows a cross-sectional schematic diagram of the light-emitting circuit structure provided in the first preferred embodiment of the present invention applied to another keyboard module; Figure 7 for Figure 6 A magnified diagram of circle A. First, please refer to... Figure 5 , Figure 6 , Figure 7The text discusses the positional configuration of the light-emitting element 200. The light emitted by the light-emitting element 200 enters the keyboard module 300 through one or more perforations 3021 in the keyboard bottom frame 302. The projections of these perforations 3021 onto the diaphragm 101 of the light-emitting circuit structure 100 define a light-transmitting incident projection 1021 and a light-blocking incident gap projection 1022. In various embodiments of the present invention, the light-emitting element 200 can be selectively positioned on the incident projection 1021 on the diaphragm 101, allowing its light to directly enter upwards corresponding to a certain perforation 3021. Alternatively, the light-emitting element 300 can be positioned on the incident gap projection 1022, allowing its light to be transversely transmitted to the incident projection 1021 via a light guide plate (not shown) and then upwards into the keyboard module 300. More specifically, the light from the light-emitting element 200 can shine upwards from the incident projection, but the light from the light-emitting element 200 cannot shine upwards from the incident gap projection. From another perspective, the aforementioned incident light projections all fall within the keycap projections (the range of the keycap 303 outline projected onto the diaphragm 101) of the keycap 303, while the incident light gap projections cover the outer gaps between two adjacent keycaps 303.

[0065] like Figure 3 , Figure 6 and Figure 7 As shown, the light-emitting circuit structure 100 of the present invention can also be applied to another keyboard module 300. The keyboard module 300 includes a circuit film 301, a key assembly 304, and keycaps 303. The circuit film 301 is also a circuit board. The key assembly 304 is disposed on the circuit film 301, and the keycaps 303 are assembled to the key assembly 304. The light-emitting circuit structure 100 of the present invention is disposed on the circuit film 301, and by… Figure 6 and Figure 7 It can be seen that the first electrode 201 and the second electrode 202 of the light-emitting body 200 are respectively connected to the rear end of the first pad 211 and the rear end of the second pad 221.

[0066] Please see Figure 8 The image shows a planar schematic diagram of the light-emitting circuit structure provided in the second preferred embodiment of the present invention. A light-emitting circuit structure 100a includes a printed base layer 1a and a printed pad layer 2a printed on a film (not shown) to electrically connect a pair of positive and negative electrodes of the light-emitting body 200.

[0067] The printed base layer 1a includes a first base layer segment 11a and a second base layer segment 12a. The first base layer segment 11a includes a first base layer end 111a and a first base layer lead 112a. The first base layer end 111a extends along the electrode connection direction De, and the first base layer lead 112a extends along the base layer direction Do and is integrally connected to the end of the first base layer end 111a. The first base layer end 111a has a first length d1a in the electrode connection direction De and a fifth length d5a in the base layer direction Do. Since the base layer direction Do and the electrode connection direction De have a tolerance angle A, the first base layer end 111a on the first base layer segment 11a forms an L-shaped branch structure relative to the first base layer lead 112a.

[0068] The second bottom line segment 12a includes a second bottom line end 121a and a second bottom line lead 122a. The second bottom line end 121a extends along the electrode connection direction De, and the second bottom line lead 122a extends along the bottom line direction Do and is integrally connected to the end of the second bottom line end 121a. The second bottom line end 121a has a second length d2a in the electrode connection direction De and a seventh length d7a in the bottom line direction Do.

[0069] The printed pad layer 2a includes a first pad (rod-shaped) 21a and a second pad (rod-shaped) 22a. The first pad (rod-shaped) 21a includes a first pad rear end 211a, which overlaps with the middle of the first bottom line end 111a, and has a third length d3a in the electrode connection direction De, which is less than the first length d1a. The first pad (rod-shaped) 21a as a whole has a sixth length d6a in the bottom line direction Do, which is greater than the fifth length d5a, and the fifth length d5a is also less than the first length d1a, ensuring that the branch structure does not approach the light emitter 200. The second pad (rod-shaped) 22a includes a second pad rear end 221a, which overlaps with the second bottom line end 121a, and has a fourth length d4a in the electrode direction De, which is less than the second length d2a. The second pad 22a as a whole has an eighth length d8a in the bottom line direction Do, which is greater than the seventh length d7a. because Figure 8 The branch structure is located at the first bottom line end 111a and the second bottom line end 121a, which are far away from the light-emitting body 200a. The branch structure located in or around the orthographic projection of the light-emitting body 200a, which is not included in the first pad front end 212a and the second pad front end 222a, can improve the printing offset problem of the printed pad layer, while also reducing the circuit density within and around the orthographic projection of the light-emitting body 200a, improving the process yield, and avoiding the circuit layout limiting the relative position of the light-emitting body 200a and the corresponding light-emitting keycap.

[0070] As described above, the first pad rear end 211a is used to connect to the first electrode (not shown) of the light emitter 200a, and the second pad rear end 221a is used to connect to the second electrode (not shown) of the light emitter 200a, so that the circuit connected by the first ground line segment 11a and the second ground line segment 12a can conduct the light emitter 200a.

[0071] Please see Figure 9 The diagram shows a planar schematic of the light-emitting circuit structure provided in the third preferred embodiment of the present invention. A light-emitting circuit structure 100b includes a printed base layer 1b and a printed pad layer 2b printed on a film (not shown) to electrically connect a pair of positive and negative electrodes 201b / 202b of the light-emitting body 200b.

[0072] The printed bottom layer 1b includes a first bottom layer segment 11b and a second bottom layer segment 12b. The first bottom layer segment 11b includes a first bottom layer end 111b, which extends along the bottom layer direction Do and has a first length d1b in the electrode connection direction De.

[0073] The second bottom line segment 12b includes a second bottom line end 121b, which extends along the bottom line direction Do and has a second length d2b in the electrode connection direction De.

[0074] The printed pad layer 2b includes a first pad (rod-shaped) 21b and a second pad (rod-shaped) 22b. The first pad (rod-shaped) 21b includes a first pad rear end 211b and a first pad front end 212b. The first pad rear end 211b extends along the electrode connection direction De and has a third length d3b in the electrode connection direction De that is greater than the first length d1b. The first pad rear end 211b overlaps with the end of the first bottom line end 111b at the middle. The first pad front end 212b extends along the bottom line direction Do and is integrally connected to the end of the first pad rear end 211b.

[0075] The second pad (rod-shaped) 22b includes a second pad rear end 221b and a second pad front end 222b. The second pad rear end 221b extends along the electrode connection direction De and has a fourth length d4b in the electrode connection direction De that is greater than the second length d2b. The second pad rear end 221b overlaps with the end of the second bottom line end 121b at the middle. The second pad front end 222b extends along the bottom line direction Do and is integrally connected to the end of the second pad rear end 221b. Since the bottom line direction Do and the electrode connection direction De have a tolerance angle A, the first pad rear end 211b on the first pad 21b forms an L-shaped branch structure relative to the first pad front end 212b. Furthermore, both the first pad rear end 211b and the second pad rear end 221b face towards... Figure 9Extending to the right (in this embodiment, parallel to the direction of the electrode connection line De), the first pad 21b and the second pad 22b, although having the same shape, do not need to be restricted to a symmetrical arrangement.

[0076] As described above, the front end 212b of the first pad is connected to the first electrode 201b of the light-emitting element 200b, and the front end 222b of the second pad is connected to the second electrode 202b of the light-emitting element 200b, so that the circuit connected by the first bottom line segment 11b and the second bottom line segment 12b can conduct the light-emitting element 200b. Furthermore, the light-emitting circuit structure 100b of this embodiment mainly utilizes the fact that the rear end 211b of the first pad has a third length d3b in the electrode connection direction De that is greater than the first length d1b, and the rear end 221b of the second pad has a fourth length d4b in the electrode connection direction De that is greater than the second length d2b. The third length d3b is, for example, 1.5 to 2.5 times greater than the first length d1b, and the fourth length d4b can also be 1.5 to 2.5 times greater than the second length d2b. This allows the printed pad layer 2b to have a tolerance range in the electrode connection direction De during the printing and coating process, effectively preventing the printed pad layer 2b from failing to contact the printed base layer 1b due to errors, thereby relatively improving the manufacturing yield of the light-emitting circuit structure 100b. Because... Figure 9 The branch structure is located at the first wiring rear end 211b and the second wiring rear end 221b, which are far away from the light-emitting element 200b. The first pad front end 212b and the second pad front end 222b do not contain branch structures located in or around the orthographic projection of the light-emitting element 200b. This can improve the printing offset problem of the printed pad layer, reduce the circuit density within and around the orthographic projection range of the light-emitting element 200b, improve the process yield, and avoid circuit layout restrictions on the relative position of the light-emitting element 200b and the corresponding light-emitting keycap.

[0077] Please see Figure 10 The image shows a planar schematic diagram of the light-emitting circuit structure provided in the fourth preferred embodiment of the present invention. A light-emitting circuit structure 100c includes a printed base layer 1c and a printed pad layer 2c printed on a film (not shown).

[0078] The printed bottom layer 1c includes a first bottom layer segment 11c and a second bottom layer segment 12c. The first bottom layer segment 11c includes a first bottom layer end 111c, which extends along the bottom layer direction Do and has a first length d1c in the electrode connection direction De, which is nearly perpendicular to the electrode connection direction De.

[0079] The second bottom line segment 12c includes a second bottom line end 121c, which extends along the bottom line direction Do and has a second length d2c in the electrode connection direction De.

[0080] The printed pad layer 2c includes a first pad (rod-shaped) 21c and a second pad (rod-shaped) 22c. The first pad (rod-shaped) 21c includes a first pad rear end 211c and a first pad front end 212c. The first pad rear end 211c extends along the electrode connection direction De and has a third length d3c in the electrode connection direction De that is greater than the first length d1c. The first pad rear end 211c overlaps with the end of the first bottom line end 111c at the middle. The first pad front end 212c extends along the bottom line direction Do and is integrally connected to the middle of the first pad rear end 211c. Since the bottom line direction Do and the electrode connection direction De have a tolerance angle A, the first pad rear end 211c on the first pad 21c forms a T-shaped branch structure relative to the first pad front end 212c.

[0081] The second pad (rod-shaped) 22c includes a second pad rear end 221c and a second pad front end 222c. The second pad rear end 221c extends along the electrode connection direction De and has a fourth length d4c in the electrode connection direction De that is greater than the second length d2c. The second pad rear end 221c overlaps with the end of the second bottom line end 121c at its middle portion. The second pad front end 222c extends along the bottom line direction Do and is integrally connected to the middle portion of the second pad rear end 221c.

[0082] As described above, the first pad front end 212c is connected to the first electrode 201c of the light-emitting element 200c, and the second pad front end 222c is connected to the second electrode 202c of the light-emitting element 200c, so that the circuit connected by the first ground line segment 11c and the second ground line segment 12c can conduct the light-emitting element 200c. Because Figure 10 The branch structure is set at the rear end 211c of the first pad and the rear end 221c of the second pad, which are far away from the light-emitting element 200c. The front end 212c of the first pad and the front end 222c of the second pad do not contain branch structures located on or around the orthographic projection of the light-emitting element 200c. This improves the printing offset problem of the printed pad layer, reduces the orthographic projection range of the light-emitting element 200c and the circuit density around it, improves the process yield, and avoids the circuit layout limiting the relative position of the light-emitting element 200c and the corresponding light-emitting keycap.

[0083] Furthermore, the light-emitting circuit structure 100c in this embodiment mainly utilizes the fact that the first pad rear end 211c has a third length d3c in the electrode connection direction De that is greater than the first length d1c, and the second pad rear end 221c has a fourth length d4c in the electrode connection direction De that is greater than the second length d2c. This allows the printed pad layer 2c to have a permissible error space in the electrode connection direction De when it is formed using a printing coating process. This effectively prevents the printed pad layer 2c from failing to contact the printed bottom layer 1c due to errors, thereby improving the manufacturing yield of the light-emitting circuit structure 100c.

[0084] Please see Figure 11 The image shows a planar schematic diagram of the light-emitting circuit structure provided in the fifth preferred embodiment of the present invention. A light-emitting circuit structure 100d includes a printed base layer 1d and a printed pad layer 2d printed on a film (not shown).

[0085] The printed base layer 1d includes a first base layer segment 11d and a second base layer segment 12d. The first base layer segment 11d includes a first base layer end 111d, which extends along the electrode connection direction De and has a first length d1d in the bridging direction Db. In this embodiment, the electrode connection direction De is parallel (or substantially parallel) to the base layer direction Do, and the bridging direction Db has a tolerance angle A with the electrode connection direction De, for example, perpendicular (or nearly perpendicular). The first base layer end 111d also has an edge 1111d. In actual operation, the bridging direction Db and the base layer direction Do have a tolerance angle of 60 degrees to 120 degrees, and in some embodiments (such as this embodiment), it is close to 90 degrees.

[0086] The second bottom line segment 12d includes a second bottom line end 121d, which extends along the electrode connection direction De and has a second length d2d in the bridging direction Db. The second bottom line end 121d also has an edge 1211d.

[0087] The printed pad layer 2d includes a first pad (rod-shaped) 21d and a second pad (rod-shaped) 22d. The first pad (rod-shaped) 21d includes a first pad rear end 211d and a first pad front end 212d. The first pad 21d extends linearly along the bridging direction Db and has a third length d3d in the bridging direction Db that is greater than the first length d1d. The first pad rear end 211d overlaps with the edge 1111d at intervals to the first bottom line end 111d. That is, the first bottom line end 111d and the first pad rear end 211d form a cross-shaped branch structure, and this branch structure has a tolerance angle A.

[0088] The second pad (rod-shaped) 22d includes a second pad rear end 221d and a second pad front end 222d. The second pad 22d extends along the bridging direction Db and has a fourth length d4d in the bridging direction Db that is greater than the second length d2d. The second pad rear end 221d overlaps with the edge 1211d at intervals to the second bottom line end 121d. That is, the second bottom line end 121d and the second pad rear end 221d form a cross-shaped branch structure, and this branch structure also has a tolerance angle A.

[0089] As described above, the first pad tip 212d is connected to the first electrode 201d of the light emitter 200d, and the second pad tip 222d is connected to the second electrode 202d of the light emitter 200d, so that the circuit connected by the first bottom line segment 11d and the second bottom line segment 12d can conduct the light emitter 200d. In this example, the light emitter 200d and the first pad tip 212d and the second pad tip 222d are all located between the substantially parallel first bottom line segment 11d and the second bottom line segment 12d. Therefore, a larger spacing is required between the first bottom line segment 11d and the second bottom line segment 12d compared to other embodiments. The first pad 21d and the second pad 22d will also have a longer overall length, and the rear ends 211d and 221d of the first pad and the second pad must be long enough to extend beyond the outer sides of the first bottom line segment 11d and the second bottom line segment 12d, respectively. For example, the sum of the lengths of the first pad 21d and the second pad 22d in the bridging direction Db is greater than the spacing between the first bottom line segment 11d and the second bottom line segment 12d. If necessary, to overcome printing errors in the bottom line direction Do, the projections of the first bottom line ends 111d and the second bottom line ends 121d of the first bottom line segment 11d and the second bottom line segment 12d in their normal direction (bridging direction Db) can overlap each other. However, the aforementioned methods will also increase the overall occupied area and relatively reduce the freedom of the arrangement of the light-emitting element 200d, which must be carefully considered when adopting them.

[0090] Furthermore, the aforementioned cross-shaped branch structure is not located in or around the orthographic projection of the light-emitting element 200d, and the front end 212d of the first pad and the front end 222d of the second pad do not contain branch structures located in or around the orthographic projection of the light-emitting element 200d, in order to improve the printing yield. The light-emitting circuit structure 100d in this embodiment mainly utilizes the fact that the first pad 21d as a whole has a third length d3d in the bridging direction Db that is greater than the first length d1d, and the second pad 22d as a whole has a fourth length d4d in the bridging direction Db that is greater than the second length d2d, so that when the printed pad layer 2d is formed using the printing coating process, there can be a margin of error in the bridging direction Db, effectively preventing the printed pad layer 2d from failing to contact the printed bottom layer 1d due to errors, thereby relatively improving the manufacturing yield of the light-emitting circuit structure 100d.

[0091] Please see Figure 12 The image shows a planar schematic diagram of the light-emitting circuit structure provided in the sixth preferred embodiment of the present invention. A light-emitting circuit structure 100e includes a printed base layer 1e and a printed pad layer 2e printed on a film (not shown).

[0092] The printed base layer 1e includes a first base layer segment 11e and a second base layer segment 12e. In this embodiment, the electrode connection direction De and the base layer direction Do have a tolerance angle A, for example, they are perpendicular (or nearly perpendicular). The first base layer segment 11e includes a first base layer end 111e, which extends along the base layer direction Do and has a first length d1e in the electrode connection direction De. The first base layer end 111e also has an edge 1111e.

[0093] The second bottom line segment 12e includes a second bottom line end 121e, which extends along the bottom line direction Do and has a second length d2e in the electrode connection direction De. The second bottom line end 121e also has an edge 1211e.

[0094] The printed pad layer 2e includes a first pad (rod-shaped) 21e and a second pad (rod-shaped) 22e. The first pad (rod-shaped) 21e includes a first pad rear end 211e and a first pad front end 212e. The first pad rear end 211e extends along the electrode connection direction De and has a third length d3e in the electrode connection direction De that is greater than the first length d1e. The first pad rear end 211e overlaps with the edge 1111e at intervals and is attached to the first bottom line end 111e. The first pad front end 212e extends along the bottom line direction Do and is integrally connected to the end of the first pad rear end 211e. Since the bottom line direction Do and the electrode connection direction De have a tolerance angle A, the first pad rear end 211e on the first pad 21e forms an L-shaped branch structure relative to the first pad front end 212e.

[0095] The second pad (rod-shaped) 22e includes a second pad rear end 221e and a second pad front end 222e. The second pad rear end 221e extends along the electrode connection direction De and has a fourth length d4e in the electrode connection direction De that is greater than the second length d2e. The second pad rear end 221e overlaps with the edge 1211e at intervals and is attached to the second bottom thread end 121e. The second pad front end 222e extends along the bottom thread direction Do and is integrally connected to the end of the second pad rear end 221e. Furthermore, since the first bottom thread end 111e and the first pad rear end 211e form a cross-shaped cross, printing offset is allowed in both the electrode connection direction De and the bottom thread direction Do; the second bottom thread end 121e and the second pad rear end 222e can also have a similar design.

[0096] As described above, the first pad tip 212e is connected to the first electrode 201e of the light-emitting element 200e, and the second pad tip 222e is connected to the second electrode 202e of the light-emitting element 200e, thereby enabling the circuit connected by the first bottom line segment 11e and the second bottom line segment 12e to conduct the light-emitting element 200e. In this example, the light-emitting element 200e and the first pad tip 212e and the second pad tip 222e are all located between the substantially parallel first bottom line segment 11e and the second bottom line segment 12e. Therefore, a larger spacing is required between the first bottom line segment 11e and the second bottom line segment 12e compared to other embodiments, only slightly smaller than... Figure 11 The distance between the first bottom line segment 11d and the second bottom line segment 12d must be such that the rear ends 211e and 221e of the first and second pads are long enough to extend beyond the outer sides of the first bottom line segment 11e and the second bottom line segment 12e, respectively. For example, the sum of the lengths of the light emitter 200e, the first pad 21e, and the second pad 22e in the electrode connection direction De is greater than the distance between the first bottom line segment 11e and the second bottom line segment 12e. If necessary, to overcome printing errors in the bottom line direction Do, the projections of the first bottom line ends 111e and 121e of the first bottom line segment 11e and the second bottom line end 121e in their normal direction (electrode connection direction De) can overlap each other. However, and Figure 11 Similarly, the aforementioned methods also increase the overall footprint, relatively reducing the freedom of arrangement of the 200e light-emitting element, and must be carefully considered when adopting them. Because Figure 12 The branch structure is located at the rear end 211e and the rear end 221e of the first pad away from the light emitter 200e. The front end 212e of the first pad and the front end 222e of the second pad do not contain branch structures located on or around the orthographic projection of the light emitter 200e. This can improve the printing offset problem of the printed pad layer, reduce the orthographic projection range of the light emitter 200e and the surrounding circuit density, improve the process yield, and avoid the circuit layout limiting the relative position of the light emitter 200e and the corresponding light key cap.

[0097] Overall, in the electrode connection direction De, the sum of the third length d3e of the first pad rear end 112e, the width of the light emitter 200e, and the fourth length d4e of the second pad rear end 122e is greater than the inner spacing (even greater than the outer spacing) of the first bottom line segment 11e and the second bottom line segment 12e, which provides a tolerance margin in the electrode connection direction De during printing. Furthermore, the light-emitting circuit structure 100e of this embodiment is similar to the light-emitting circuit structure 100 described above. Both primarily utilize a third length d3e greater than the first length d1e and a fourth length d4e greater than the second length d2e, allowing the printed pad layer 2e to have tolerance space in both the electrode connection direction De and the bottom line direction Do during the printing and coating process. This effectively prevents the printed pad layer 2e from failing to contact the printed bottom line layer 1e due to errors, thereby improving the manufacturing yield of the light-emitting circuit structure 100e.

[0098] Please see Figure 13 This is a planar schematic diagram of the light-emitting circuit structure provided in the seventh preferred embodiment of the present invention. A light-emitting circuit structure 100f includes a printed base layer 1f and a printed pad layer 2f printed on a film (not shown) to electrically connect a pair of electrodes of the light-emitting body 200f.

[0099] The printed bottom layer 1f includes a first bottom layer segment 11f and a second bottom layer segment 12f. In this embodiment, the electrode connection direction De and the bottom layer direction Do have a tolerance angle A, and the two are, for example, perpendicular (or nearly perpendicular). The first bottom layer segment 11f includes a first bottom layer end 111f, which extends along the bottom layer direction Do; wherein, the first bottom layer end 111f has a first length d1f in the electrode connection direction De.

[0100] The second bottom line segment 12f includes a second bottom line end 121f, which extends along the bottom line direction Do; wherein, the second bottom line end 121f has a second length d2f in the electrode connection direction De.

[0101] The printed pad layer 2f includes a first pad (circular) 21f and a second pad (circular) 22f. The first pad (circular) 21f includes a first pad rear end 211f, which has a third length d3f in the electrode connection direction De that is greater than the first length d1f, and the first pad rear end 211f is connected to the first bottom line end 111f.

[0102] The second pad (circular) 22f includes a second pad rear end 221f, the second pad rear end 221f having a fourth length d4f greater than the second length d2f in the electrode connection direction De, and the second pad rear end 221f is connected to the second bottom line end 121f.

[0103] As described above, the first pad rear end 211f is used to connect to the first electrode 201f of the light emitter 200f, and the second pad rear end 221f is used to connect to the second electrode 202f of the light emitter 200f, so that the circuit connected by the first bottom line segment 11f and the second bottom line segment 12f can conduct the light emitter 200f.

[0104] In this embodiment, the light-emitting circuit structure 100f mainly uses a third length d3f that is greater than the first length d1f and a fourth length d4f that is greater than the second length d2f, so that the printed pad layer 2f can have a tolerance space in the electrode connection direction De when it is formed by the printing coating process. This effectively prevents the printed pad layer 2f from failing to contact the printed bottom layer 1f due to errors, thereby improving the manufacturing yield of the light-emitting circuit structure 100f.

[0105] Please see Figure 14 The diagram shows a planar schematic of the light-emitting circuit structure provided in the eighth preferred embodiment of the present invention. The light-emitting circuit structure 100g includes a printed base layer 1g and a printed pad layer 2g printed on a film (not shown), for electrically connecting a pair of positive and negative electrodes of each of the three light emitters 200R, 200G, and 200B (e.g., including three light-emitting diodes; three in total, red, green, and blue). Figure 14 In this embodiment, three light emitters, 200R, 200G, and 200B, are arranged in a straight line, all sharing the same electrode connection direction De, which is parallel (or substantially parallel) to the baseline direction Do. In this embodiment, both the electrode connection direction De and the baseline direction Do form a tolerance angle A with the bridging direction De. In actual operation, the bridging direction Db and the baseline direction Do have a tolerance angle of 60 to 120 degrees, approaching 90 degrees in some embodiments (such as this one).

[0106] The printed baseline layer 1g comprises three first baseline segments 11g, 12g, and 13g, and three second baseline segments 14g, 15g, and 16g. The first baseline segments 11g, 12g, and 13g each comprise first baseline ends 111g, 121g, and 131g, and first baseline leads 112g, 122g, and 132g, respectively. The first baseline ends 111g, 121g, and 131g extend along the bridging direction Db, and the first baseline leads 112g, 122g, and 132g extend along the baseline direction Do / electrode connection direction De, and are integrally connected to the middle of the first baseline ends 111g, 121g, and 131g. The first baseline ends 111g, 121g, and 131g have a first length d1 in the bridging direction Db and a fifth length d5 ​​in the baseline direction Do / electrode connection direction De, where the fifth length d5 ​​is less than the first length d1.

[0107] The second bottom line segments 14g, 15g, and 16g respectively include second bottom line ends 141g, 151g, and 161g and second bottom line leads 142g, 152g, and 162g. The second bottom line ends 141g, 151g, and 161g extend along the bridging direction Db, and the second bottom line leads 142g, 152g, and 162g extend along the bottom line direction Do / electrode connection direction De. Among them, the second bottom line ends 141g, 151g, and 161g have a second length d2 in the bridging direction Db and a seventh length d7 in the bottom line direction Do / electrode connection direction De, and the seventh length d7 is less than the second length d2.

[0108] The printed pad layer 2g includes three first pads 21g, 22g, and 23g, and three second pads 24g, 25g, and 26g. The first pads 21g, 22g, and 23g each include a rear end 211g, 221g, and 231g, and a front end 212g, 222g, and 232g. The rear ends 211g, 221g, and 231g extend along the baseline direction Do / electrode connection direction De and overlap with the ends of the first baseline ends 111g, 121g, and 131g, respectively, and have a third length d3 in the bridging direction Db that is less than the first length d1. The front ends 212g and 232g extend along the bridging direction Db and are integrally connected to the ends of the rear ends 211g and 231g, respectively. The front ends of the first pads 212g, 222g, and 232g are respectively connected to the first electrodes 201g, 202g, and 203g of the light emitters 200B, 200R, and 200G.

[0109] The front end 222g of the first pad and the front end 252g of the second pad also extend along the bottom line direction Do / electrode connection direction De, and are integrally formed and connected to the ends of the rear ends 221g and 251g of the first pad, respectively. In comparison, the first pads 21g and 23g are mirror images of each other with similar structures, the only difference being that the front ends 212g and 232g of the first pads are connected to the opposite sides of the rear ends 211g and 231g of the first pads, respectively; the same applies to the second pads 24g and 26g.

[0110] The second pads 24g, 25g, and 26g respectively include the rear ends 241g, 251g, and 261g of the second pads and the front ends 242g, 252g, and 262g of the second pads. The front ends 242g and 262g of the second pads extend along the bridging direction Db and are connected to the second electrodes 204g and 206g of the light emitters 200B and 200G, respectively. The front end 252g of the second pads also extends along the bottom line direction Do / electrode connection direction De and is connected to the second electrode 205g of the light emitter 200R. The rear ends 241g, 251g, and 261g of the second pads extend along the bottom line direction Do / electrode connection direction De and are connected to the second bottom line ends 141g, 151g, and 161g, and the rear ends 241g, 251g, and 261g of the second pads have a fourth length d4 in the bridging direction Db that is smaller than the second length d2.

[0111] As described above, in this embodiment, the first bottom line segments 11g, 12g, and 13g respectively have first bottom line ends 111g, 121g, and 131g, and the second bottom line segments 14g, 15g, and 16g respectively have second bottom line ends 141g, 151g, and 161g as branch structures. Even if the first pads 21g, 22g, and 23g and the second pads 24g, 25g, and 26g are printed off in the bridging direction De, they can still be connected by the first bottom line ends 111g, 121g, and 131g overlapping to the front ends 212g, 222g, and 232g of the first pads, and by the second bottom line ends 141g, 151g, and 161g overlapping to the rear ends 241g, 251g, and 261g of the second pads. The rear ends 241g and 261g of the second pads can also be regarded as branch structures of the second pads 24g and 26g. In summary, a branch structure is formed at the junction of the bottom edge of the printed bottom layer 1g and the rear end of the pad of the printed pad layer 2g. These branch structures have a tolerance angle A, which not only facilitates connection under printing offset but also helps reduce the circuit density in the orthographic projection of the light-emitting element or around the light-emitting element. Furthermore, the first / second pads of this invention do not have T-shaped or L-shaped bends or other branch structures in the orthographic projection of the light-emitting element or around the light-emitting element, nor do they increase the occupied area. This avoids limiting the design of the light-emitting element position and also avoids overflow, overprinting, and short-circuit problems that may occur during the printing process, thus improving the yield of the printing process for micro-light-emitting elements such as Mini LEDs or Micro LEDs.

[0112] Furthermore, since the first length d1 of the first bottom wire ends 111g, 121g, and 131g in the bridging direction Db is greater than their respective fifth length d5 ​​in the bottom wire direction Do / electrode connection direction De, and the first length d1 is greater than the third length d3 of the first pad rear ends 211g, 221g, and 231g in the bridging direction Db, and the second length d2 of the second bottom wire ends 141g, 151g, and 161g in the bridging direction Db is also greater than their respective seventh length in the bottom wire direction Do / electrode connection direction De,... d7, and the second length d2 is greater than the fourth length d4 of the rear ends of the second pads 241g, 251g, and 261g in the bridging direction Db. Therefore, it can be ensured that the branch structure of the printed bottom layer 1g and the printed pad layer 2g falls away from the light emitters 200B, 200R, and 200G, thereby effectively solving the printing offset problem of the printed pad layer 2g, and without increasing the orthographic projection of the light emitters 200B, 200R, and 200G and the circuit density around them, thereby relatively improving the manufacturing yield of the light-emitting circuit structure 100g.

[0113] Please see Figure 15 This is a planar schematic diagram of the light-emitting circuit structure provided in the ninth preferred embodiment of the present invention. A light-emitting circuit structure 100h includes a printed baseline layer 1h and a printed pad layer 2h. In this example, the electrode connection direction De is parallel (or substantially parallel) to the baseline direction Do; both the electrode connection direction De and the baseline direction Do form a tolerance angle A with the bridging direction De. In actual operation, the bridging direction Db and the baseline direction Do have a tolerance angle of 60 degrees to 120 degrees, and in some embodiments (such as this embodiment), it may be close to 90 degrees.

[0114] The printed base layer 1h comprises three first base layer segments 11h, 12h, and 13h, and three second base layer segments 14h, 15h, and 16h. The first base layer segments 11h, 12h, and 13h respectively comprise first base layer ends 111h, 121h, and 131h, and first base layer leads 112h, 122h, and 132h. The structures of the first base layer segments 11h, 12h, and 13h are similar to those of the first base layer segments 11g, 12g, and 13g in the above embodiment, and therefore will not be described in detail here.

[0115] The second bottom line segments 14h, 15h, and 16h respectively include second bottom line ends 141h, 151h, and 161h extending along the bridging direction Db. The second bottom line ends 141h, 151h, and 161h have a wiring area length dah in the bridging direction Db; more specifically, the wiring area length dah refers to the total width of the two outermost of the second bottom line ends 141h, 151h, and 161h, meaning the distance from the other edge of the second bottom line end 141h relative to the other edge of the second bottom line end 151h to the other edge of the second bottom line end 161h relative to the second bottom line end 151h, which is equivalent to the sum of the widths of the second bottom line ends 141h, 151h, and 161h in the bridging direction Db and the gaps between them.

[0116] The printed pad layer 2h includes three first pads 21h, 22h, and 23h and a second pad 24h. The three first pads 21h, 22h, and 23h are respectively connected to the first electrodes 201h, 202h, and 203h of the light emitter, and the second pad 24h is connected to the second electrodes 204h, 205h, and 206h of the light emitters 200B, 200R, and 200G.

[0117] The first pads 21h, 22h, and 23h include the rear ends 211h, 221h, and 231h of the first pad and the front ends 212h, 222h, and 232h of the first pad. The first pads 21h, 22h, and 23h have similar structures to the first pads 21g, 22g, and 23g mentioned above, so they will not be described in detail here.

[0118] The second pad 24h extends along the bridging direction Db and has a second length d2 in the bridging direction Db that is greater than the wiring area length dah. Thus, the second pad 24h can cross the second bottom line ends 141h, 151h, and 161h and be connected to the second bottom line ends 141h, 151h, and 161h respectively.

[0119] In this embodiment, the front ends 212h, 222h, and 232h of the three first pads are respectively used to connect to the three first electrodes 201h, 202h, and 203h of the light emitter 200h. The three second electrodes 204h, 205h, and 206h of the light emitters 200B, 200R, and 200G are all connected to the second pad 24h. Therefore, the second pad 24h can achieve the effect of sharing a cathode or anode with respect to the light emitters 200B, 200R, and 200G. Figure 14 and Figure 15 The main difference is that the second pad 24h can also be considered as three independent pads connected to each other in the bridging direction Db.

[0120] Please see Figure 16 This is a planar schematic diagram of the light-emitting circuit structure provided in the tenth preferred embodiment of the present invention. Figure 16 and Figure 15 Similar to other embodiments, all have branch structures located at the junctions of the first bottom line ends 111h, 121h, 131h and the first pad ends 211h, 221h, 231h. However, Figure 16 In this design, the first bottom line ends 111h, 121h, and 131h do not extend along the bridging direction Db. Instead, they extend along the electrode connection direction De / bottom line direction Do. Furthermore, the first pad rear ends 211h, 221h, and 231h extending along the electrode connection direction De / bottom line direction Do also have first pad rear branches 213h, 223h, and 233h. These first pad rear branches 213h, 223h, and 233h extend along the bridging direction Db and overlap with the first bottom line ends 111h, 121h, and 131h, forming three branch structures with a tolerance angle A. This also solves the aforementioned technical problem and achieves the same technical effect.

[0121] In summary, this invention primarily utilizes a branch structure at the overlap of the printed base layer and the printed pad layer. This ensures that even if the printed pad layer experiences printing misalignment during the manufacturing process, the rear ends of the first / second pads of the printed pad layer can still smoothly overlap and connect to the first / second base ends of the printed base layer. Furthermore, the aforementioned branch structure is not located in or around the orthogonal projection of the light-emitting element, reducing the orthogonal projection range of the light-emitting element and the circuit density around it, thereby improving the manufacturing yield of the light-emitting circuit structure.

[0122] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A light emitting circuit structure, characterized by Include: The first bottom line segment extends along the bottom line direction. The first bottom line segment includes a first bottom line end extending along the electrode connection line direction. The first bottom line end has a first length in the electrode connection line direction and a fifth length in the bottom line direction. The first length is greater than the fifth length. The bottom line direction and the electrode connection direction have a tolerance angle, so that the first bottom line end on the first bottom line segment forms a branch structure. The second bottom line segment includes a second bottom line end extending along the direction of the electrode connection line; The first pad includes a connected first pad rear end and a first pad front end, the first pad rear end extending along the bottom line direction and connected to the first bottom line end. The second pad includes a connected second pad rear end and a second pad front end, the second pad rear end extending along the bottom line direction and connected to the second bottom line end; A diaphragm, wherein the first bottom line segment, the second bottom line segment, the first pad and the second pad are disposed on the diaphragm; and The light emitter has a pair of electrodes, the electrode connection direction is defined by the pair of electrodes, the pair of electrodes are electrically connected to the front end of the first pad and the front end of the second pad respectively, and the front end of the first pad and the front end of the second pad do not contain any branch structures located on or around the orthographic projection of the light emitter.

2. The light-emitting circuit structure according to claim 1, characterized in that The first bottom line segment further includes a first bottom line lead, which extends along the bottom line direction, and the end of the first bottom line is integrally connected to the first bottom line lead to form a branch structure.

3. The light emitting circuit structure of claim 1, wherein, The sixth length of the first pad as a whole in the direction of the bottom line is greater than the fifth length of the first bottom line end.

4. The light emitting circuit structure of claim 1, wherein, The second bottom line segment has a second bottom line lead, which extends along the bottom line direction and forms another branch structure with the end of the second bottom line.

5. The light emitting circuit structure of claim 1, wherein, The second bottom line end has a second length in the direction of the electrode connection line and a seventh length in the direction of the bottom line, the second length being greater than the seventh length.

6. A light emitting circuit structure, characterized by Include: The first bottom line segment includes a first bottom line end extending along the bottom line direction, the first bottom line end having a first length in the direction of the electrode connection line; The second bottom line segment includes the second bottom line end extending along the direction of the bottom line; The first pad includes a connected first pad rear end and a first pad front end. The first pad rear end extends along the electrode connection line direction and has a third length in the electrode connection line direction. The third length is greater than the first length, and the first pad rear end is connected to the first bottom line end. The bottom line direction and the electrode connection line direction have a tolerance angle, so that the first pad rear end on the first pad forms a branch structure. The second pad includes a connected rear end and a front end of the second pad, the rear end of the second pad extending along the electrode connection direction and connected to the end of the second bottom line. A diaphragm, wherein the first bottom line segment, the second bottom line segment, the first pad and the second pad are disposed on the diaphragm; and The light emitter has a pair of electrodes, the electrode connection direction is defined by the pair of electrodes, the pair of electrodes are electrically connected to the front end of the first pad and the front end of the second pad respectively, and the front end of the first pad and the front end of the second pad do not contain any branch structures located on or around the orthographic projection of the light emitter.

7. The light-emitting circuit structure according to claim 6, characterized in that The front end of the first pad extends along the bottom line direction, and the rear end of the first pad is integrally connected to the front end of the first pad to form a branch structure.

8. The light emitting circuit structure of claim 6, wherein, The first pad and the second pad have the same shape but are arranged asymmetrically.

9. The light emitting circuit structure of claim 6, wherein, The front end of the first pad is integrally connected to the middle or end of the rear end of the first pad.

10. The light-emitting circuit structure according to claim 6, characterized in that, The first bottom edge and the rear end of the first pad form a cross shape.

11. The light emitting circuit structure of claim 6, wherein, The light-emitting element, the front end of the first pad, and the front end of the second pad are all located between the first bottom line segment and the second bottom line segment.

12. The light emitting circuit structure of claim 6, wherein, The sum of the lengths of the light emitter, the first pad, and the second pad in the direction of the electrode connection is greater than the distance between the first bottom line segment and the second bottom line segment in the direction of the electrode connection.

13. The light emitting circuit structure of claim 1 or 6, wherein, The front end of the first pad and the front end of the second pad are respectively perpendicular to the direction of the electrode connection line.

14. The light emitting circuit structure of claim 1 or 6, wherein, The first bottom line segment further includes a first bottom line lead extending along the bottom line direction, and the second bottom line segment further includes a second bottom line lead extending along the bottom line direction. The first bottom line lead and the second bottom line lead are respectively spaced apart in the bottom line direction and / or the electrode connection direction.

15. A light emitting circuit structure, characterized by Include: At least one first bottom line segment extends along the direction of the electrode connection line, and each first bottom line segment includes a first bottom line end; At least one second bottom line segment extends along the direction of the electrode connection line, and each second bottom line segment includes a second bottom line end; At least one first pad includes a connected first pad rear end and a first pad front end, the first pad front end extends along a bridging direction, and the first pad rear end is connected to the first bottom line end, wherein the bridging direction has a tolerance angle with the electrode connection direction, and a branch structure is formed at the junction of the first bottom line end and the first pad rear end. At least one second pad extends at least partially along the bridging direction and is attached to the end of the second bottom line; A diaphragm, wherein the first bottom line segment, the second bottom line segment, the first contact pad, and the second contact pad are disposed on the diaphragm; and At least one light-emitting element has at least one pair of electrodes, the electrode connection direction is defined according to the at least one pair of electrodes, and the at least one pair of electrodes of the at least one light-emitting element are respectively electrically connected to the first pad and the second pad; The branch structure is not located on or around the orthographic projection of the light source, and the branch structure has the tolerance angle. The first bottom line end on the first bottom line segment extends along the bridging direction, and the rear end of the first pad extends along the electrode connection direction, together forming the branch structure.

16. The light emitting circuit structure of claim 15, wherein, The first bottom line end has a first length in the bridging direction and a fifth length in the bottom line direction, the first length being greater than the fifth length.

17. The light emitting circuit structure of claim 15, wherein, Two first bottom line ends extend along the bridging direction, and two first pad rear ends extend along the electrode connection direction. The two first bottom line ends and the two first pad rear ends each form a branch structure.

18. The light-emitting circuit structure according to claim 15, characterized in that, The sum of the lengths of the first pad and the second pad in the bridging direction is greater than the distance between the first bottom line segment and the second bottom line segment.

19. The light emitting circuit structure of claim 1, 6 or 15, wherein, The light-emitting element is disposed on the keycap projection on the diaphragm or in the outer gap of the keycap projection.

20. A light emitting circuit structure, characterized by Include: At least one first bottom line segment extends along the electrode connection direction, and each first bottom line segment includes a first bottom line end that extends along the electrode connection direction. At least one second bottom line segment extends along the direction of the electrode connection line, and each second bottom line segment includes a second bottom line end; At least one first pad includes a connected first pad rear end and a first pad front end, the first pad rear end extends along the electrode connection direction, and the first pad rear end also has a first pad rear branch, the first pad rear branch extends along the bridging direction, the first pad rear branch overlaps with the first bottom line end, the first pad front end extends along the bridging direction, wherein the bridging direction and the electrode connection direction have a tolerance angle, and a branch structure is formed at the junction of the first bottom line end and the first pad rear branch; At least one second pad extends along the bridging direction and is attached to the end of the second bottom line; A diaphragm, wherein the first bottom line segment, the second bottom line segment, the first contact pad, and the second contact pad are disposed on the diaphragm; and At least one light-emitting element has at least one pair of electrodes, the electrode connection direction is defined according to the at least one pair of electrodes, and the at least one pair of electrodes of the at least one light-emitting element are respectively electrically connected to the first pad and the second pad; The branch structure is not located in or around the orthographic projection of the light source, and the branch structure has the tolerance angle.

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