Light emitting device
By employing a combination structure of multiple light-emitting element arrays and transmission thyristors in the light-emitting device, and utilizing the first and second wirings to achieve independent control of multiple light-emitting element arrays, the problem of increasing the number of signal lines is solved, and the number of light-emitting element arrays and line scanning effect are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-07
AI Technical Summary
When increasing the number of light-emitting element arrays, existing technologies require an increase in the number of signal lines, leading to increased control complexity.
The system employs a combination structure of multiple light-emitting element arrays and transmission thyristors, wherein the number of transmission thyristors is greater than the number of light-emitting element arrays. Independent control of the multiple light-emitting element arrays is achieved through first and second wiring, and the light-emitting element arrays are arranged in adjacent directions to achieve line scanning.
While suppressing the increase in the number of signal lines, the number of independently controllable light-emitting element arrays was increased, and simultaneous lighting and line scanning of multiple light-emitting element arrays were achieved, expanding the range of paper size selection.
Smart Images
Figure CN121815482A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a light-emitting device. Background Technology
[0002] A technique is known to irradiate different regions of an irradiated surface using multiple segmented irradiation light sources (see, for example, Japanese Patent No. 5316589). Additionally, a technique is known in which, in a structure having multiple blocks that perform shifting operations and a shift signal line commonly disposed among the multiple blocks and selecting the block to perform the shifting operation based on a shift signal, the states are reversed in each block, for example, block #1 and block #2 (see, for example, Japanese Patent Application Publication No. 2023-112927). Summary of the Invention
[0003] To control each of the multiple light-emitting element arrays, a separate signal line is required. When adding light-emitting element arrays for independent control, multiple signal lines are needed for each light-emitting element array.
[0004] The purpose of this invention is to increase the number of independently controllable light-emitting element arrays while suppressing the increase in the number of signal lines.
[0005] According to a first aspect of the present invention, a light-emitting device is provided, comprising: a plurality of light-emitting element arrays, each of the plurality of light-emitting element arrays having a plurality of light-emitting elements; a first wiring connection connected to the plurality of light-emitting element arrays; a second wiring connection connected to each of a plurality of light-emitting element array groups formed by dividing the plurality of light-emitting element arrays; and a transmission unit comprising a plurality of transmission thyristors, which control the lighting of the plurality of light-emitting elements in each of the plurality of light-emitting element arrays via the first wiring connection and the second wiring connection, wherein the number of transmission thyristors is greater than the number of light-emitting element arrays, and adjacent transmission thyristors are connected to the same first light-emitting element array in the plurality of light-emitting element arrays.
[0006] According to a second aspect of the present invention, in the light-emitting device involved in the first aspect, the second light-emitting element array in the plurality of light-emitting element arrays is adjacent to the first light-emitting element array and is lit simultaneously, and the second light-emitting element array is connected to a transmission thyristor disposed next to the transmission thyristor connected to the first light-emitting element array.
[0007] According to a third aspect of the present invention, in the light-emitting device involved in the first or second aspect, the plurality of light-emitting elements constituting the first light-emitting element array are arranged to be longer in the direction in which the plurality of light-emitting element arrays are adjacent to each other when lit simultaneously.
[0008] According to a fourth aspect of the present invention, in the light-emitting device involved in the third aspect, two of the plurality of light-emitting element arrays are arranged in the adjacent direction, and n (n is an integer value of 2 or more) are arranged in the direction orthogonal to the adjacent direction.
[0009] According to a fifth aspect of the present invention, in the light-emitting device involved in the second or third aspect, the combination of the transmission section and the plurality of light-emitting element arrays forms a chip, and the light-emitting element arrays of two chips arranged in an opposing manner are simultaneously lit in the adjacent direction.
[0010] According to a sixth aspect of the present invention, in the light-emitting device involved in the fifth aspect, the two chips share a line connected to the first wiring.
[0011] According to a seventh aspect of the present invention, in the light-emitting device involved in the sixth aspect, the structures of the two chips arranged in a relative manner are approximately linearly symmetrical.
[0012] According to the eighth aspect of the present invention, in the light-emitting device involved in the sixth aspect, with respect to the two chips, the connection of the first wiring and the second wiring connecting the light-emitting element array and the transmission section is approximately mirror-symmetrical, and they share the line connected to the second wiring.
[0013] According to a ninth aspect of the present invention, in the light-emitting device involved in the sixth aspect, the structures of the two chips arranged in a relative manner are approximately point-symmetrical.
[0014] (Effect)
[0015] According to the first scheme, the number of independently controllable light-emitting element arrays can be increased while suppressing the increase in the number of signal lines.
[0016] According to the second scheme, multiple adjacent arrays of light-emitting elements can be lit simultaneously. As a result, line scanning can be achieved.
[0017] According to the third scheme, multiple light-emitting element arrays can be simultaneously illuminated in a long linear pattern. As a result, the range of paper sizes that can be scanned in a line is expanded.
[0018] According to the fourth scheme, the range of possible combinations of multiple light-emitting element arrays is expanded, which is not limited to the 2 rows and 6 columns of the implementation.
[0019] According to the fifth scheme, wiring can be shared between chips.
[0020] According to the sixth scheme, wiring can be shared between chips.
[0021] According to the seventh scheme, wiring can be shared between chips.
[0022] According to the eighth scheme, mass production can be achieved while suppressing the increase in the types of chips, and signals can be shared at the same time.
[0023] According to the ninth scheme, mass production can be achieved while suppressing the increase in the types of chips, and signals can be shared at the same time. Attached Figure Description
[0024] Figure 1 Figure (A) is an example of a combination of a light-emitting part and a transmission part constituting a light-emitting device according to this embodiment. Figure 1 (B) is a timing diagram that explains the operation of the light-emitting part and the transmission part;
[0025] Figure 2 This diagram illustrates an example of a light-emitting device according to this embodiment having two chips composed of a combination of a light-emitting section and a transmitting section.
[0026] Figure 3 (A) is a diagram showing the structure of a conventional light-emitting device. Figure 3 (B) is a timing diagram that explains the operation of the light-emitting part and the transmission part of a conventional light-emitting device;
[0027] Figure 4 This diagram illustrates a specific example of a light-emitting device according to this embodiment having two chips composed of a combination of a light-emitting section and a transmitting section.
[0028] Figure 5 This diagram illustrates a specific example of a light-emitting device according to this embodiment having two chips composed of a combination of a light-emitting section and a transmitting section.
[0029] Figure 6 This diagram illustrates a specific example of a light-emitting device according to this embodiment having four chips composed of a combination of a light-emitting section and a transmitting section.
[0030] Figure 7 This diagram illustrates a specific example of a light-emitting device according to this embodiment having eight chips composed of a combination of a light-emitting section and a transmission section. Detailed Implementation
[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[0032] <Structure of Light-emitting Device 1>
[0033] Figure 1 (A) is a diagram showing an example of the combination of the light-emitting part 11 and the transmission part 12 constituting the light-emitting device 1 of this embodiment.
[0034] The light-emitting device 1 is, for example, an exposure unit used in a print head or similar device, typically referred to as a tandem image forming apparatus. Figure 1 As shown in (A), the light-emitting device 1 has a light-emitting part 11, a transmission part 12, a first wiring 13 and a second wiring 14.
[0035] [Light-emitting part 11]
[0036] The light-emitting section 11 is composed of blocks, each having an array of multiple light-emitting elements. Figure 1 In (A), there are rectangular blocks representing each of the 12 arrays of light-emitting elements having multiple light-emitting elements, and each block is marked with a number "B1" to "B12". In the light-emitting section 11, each block is arranged in 2 rows and 6 columns facing the transmission section 12, with odd-numbered blocks arranged on the first side of the main scanning direction and even-numbered blocks arranged on the second side of the main scanning direction.
[0037] Specifically, blocks B1, B3, B5, B7, B9, and B11, which are odd-numbered and located on the first side of the main scanning direction, are arranged in this order from the third side of the sub-scanning direction toward the fourth side. Similarly, blocks B2, B4, B6, B8, B10, and B12, which are even-numbered and located on the second side of the main scanning direction, are arranged in this order from the third side of the sub-scanning direction toward the fourth side.
[0038] In addition, Figure 1 In example (A), the light-emitting unit 11 consists of 12 blocks arranged in 2 rows and 6 columns facing the transmission unit 12, but it is not limited to this. For example, it can also be arranged in 2 rows and n columns (n is an integer value of 2 or more), that is, two blocks are arranged in the adjacent direction (main scanning direction), and n blocks are arranged in the direction orthogonal to the adjacent direction (sub-scanning direction). It is also possible that three or more blocks are arranged in the adjacent direction (main scanning direction).
[0039] [Transportation Department 12]
[0040] The transmission unit 12 is equipped with multiple transmission thyristors to control the lighting of multiple light-emitting elements in each of the multiple light-emitting element arrays. Figure 1 The transmission unit 12 of (A) has 24 transmission thyristors, and each transmission thyristor is marked with a number "1" to "24". Figure 1 In example (A), the transmission thyristor numbered "2" is connected to block B1 of the light-emitting section 11, and the transmission thyristors numbered "3" and "4" are connected to block B2 of the light-emitting section 11. In addition, the transmission thyristor numbered "5" is connected to block B3 of the light-emitting section 11, and the transmission thyristors numbered "6" and "7" are connected to block B4 of the light-emitting section 11.
[0041] It can only be set to a simultaneously "ON" state (lit state) when the transmitting thyristors are adjacent. Therefore, in Figure 1 In example (A), to make adjacent blocks B1 and B2 emit light simultaneously via the light-emitting unit 11, the connection is as follows: The transmitting thyristor numbered "2" is connected to block B1, and the transmitting thyristor numbered "3" next to it and the transmitting thyristor numbered "4" next to it are connected to the same block B2. Alternatively, to make adjacent blocks B3 and B4 emit light simultaneously, the connection is as follows: The transmitting thyristor numbered "5" is connected to block B3, and the transmitting thyristor numbered "6" next to it and the transmitting thyristor numbered "7" next to it are connected to the same block B4.
[0042] Thus, in the light-emitting device 1, there are cases where one transmission thyristor is connected to one block of the light-emitting section 11, and cases where two adjacent transmission thyristors are connected to one block. Therefore, in the light-emitting device 1, the number of transmission thyristors configured as the transmission section 12 is greater than the number of light-emitting element arrays (blocks) of the light-emitting section 11.
[0043] The transmission section 12 is connected to a first wiring 13 (Phi1 (master)) and a second wiring 14 (Phi2). The transmission section 12 causes blocks B1 to B12 of the light-emitting section 11 to emit light via the first wiring 13 and the second wiring 14. The combination of the transmission section 12 and the light-emitting section 11 constitutes a chip 101 that can operate independently.
[0044] [First Wiring 13]
[0045] The first wiring 13 is a wiring that connects to multiple light-emitting element arrays. Figure 1 In example (A), the first wiring 13 is a wiring that connects to blocks B1 to B12 of the light-emitting portion 11 of chip 101 and other arrays of multiple light-emitting elements. Furthermore, see later... Figure 2 A specific example of "other arrays of multiple light-emitting elements" is described.
[0046] [Second wiring 14]
[0047] The second wiring 14 is a wiring connected to each of the multiple light-emitting element array groups formed by dividing the arrays into multiple light-emitting element arrays. Figure 1 In example (A), the second wiring 14 is a wiring that connects to multiple light-emitting element array groups, namely blocks B1 to B12, and other multiple light-emitting element array groups. Furthermore, refer to... Figure 2 Specific examples of "other multiple light-emitting element array groups" will be described later.
[0048] Figure 1(B) is a timing diagram illustrating the operation of the light-emitting unit 11 and the transmission unit 12. Figure 1 In the timing diagram (B), "H" represents a high-level potential, and "L" represents a low-level potential. Furthermore, it is assumed that time flows from left to right in the diagram. Figure 1 In the timing diagram of (B), Phi1 (master) represents the above. Figure 1 The first wiring 13 of (A), Phi2 represents Figure 1 (A) Second wiring 14.
[0049] like Figure 1 As shown in (B), the signal transmitted from the transmission unit 12 to the light-emitting unit 11 via Phi1 (master) (hereinafter referred to as the "first signal") repeatedly moves from "L" to "H" and from "H" to "L" at approximately constant intervals, and this state is maintained when it moves from "L" to "H" at time t3. Furthermore, when the second signal (hereinafter referred to as the "second signal") transmitted from the transmission unit 12 to the light-emitting unit 11 via Phi2 moves from "L" to "H" at time t1, this state is maintained. As a result, adjacent blocks B1 and B2 in the light-emitting unit 11 are simultaneously illuminated. Additionally, when the second signal in the second signal moves from "L" to "H" at time t2, this state is maintained. As a result, adjacent blocks B5 and B6 in the main scanning direction in the light-emitting unit 11 are simultaneously illuminated.
[0050] Here, the plurality of light-emitting elements constituting each block of the light-emitting section 11 are configured to become longer in the direction (main scanning direction) in which the plurality of blocks are adjacent to each other when they are lit simultaneously. Specifically, for example, in Figure 2 In example (A), the multiple light-emitting elements that constitute blocks B1 and B2 that emit light simultaneously are configured to vary in length in the direction adjacent to blocks B1 and B2 (main scanning direction).
[0051] Figure 2 This diagram illustrates an example of a light-emitting device 1 according to this embodiment having two chips composed of a combination of a light-emitting part 11 and a transmission part 12.
[0052] By arranging multiple chips, which are composed of a combination of a light-emitting unit 11 and a transmission unit 12, side by side along the main scanning direction, it is possible to achieve "line scanning", in which multiple light-emitting element arrays are simultaneously lit in a linear fashion along the main scanning direction. Figure 2 This illustrates an example of a light-emitting device 1 that achieves line scanning by arranging two chips 201 and 202 side by side in a relative manner.
[0053] Figure 1 The structure of the chip 201 shown is the same as described above. Figure 2The structure is the same as that of chip 101 shown in (A). That is, in the light-emitting part 11 of chip 201, each block is arranged in 2 rows and 6 columns toward the transmission part 12, with odd-numbered blocks arranged on the first side of the main scanning direction and even-numbered blocks arranged on the second side of the main scanning direction. Specifically, the odd-numbered blocks B1, B3, B5, B7, B9 and B11 arranged on the first side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side. In addition, the even-numbered blocks B2, B4, B6, B8, B10 and B12 arranged on the second side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side.
[0054] Figure 1 The structure of the chip 202 shown is also the same as described above. Figure 1 The structure is the same as that of chip 101 shown in (A). That is, in the light-emitting part 11 of chip 202, each block is arranged in 2 rows and 6 columns facing the transmission part 12. However, since chip 202 is arranged opposite to chip 201, the odd-numbered blocks are arranged on the second side of the main scanning direction, and the even-numbered blocks are arranged on the first side of the main scanning direction. Specifically, the odd-numbered blocks B1, B3, B5, B7, B9 and B11 arranged on the second side of the main scanning direction are arranged in this order from the fourth side of the sub-scanning direction toward the third side. In addition, the even-numbered blocks B2, B4, B6, B8, B10 and B12 arranged on the first side of the main scanning direction are arranged in this order from the fourth side of the sub-scanning direction toward the third side.
[0055] Each of chips 201 and 202 has a transmission section 12 equipped with 24 transmission thyristors, and each thyristor is marked with a number from "1" to "24". The connection state between the light-emitting section 11 and the transmission section 12 of each of chips 201 and 202 is... Figure 2 The connection state of the light-emitting part 11 and the transmission part 12 of the chip 101 shown in (A) is the same.
[0056] A first wiring 13 (Phi1 (master)) is connected to the respective transmission section 12 of chips 201 and 202. Figure 2 In this example, the first wiring 13 is a wiring that is connected to blocks B1 to B12 of the light-emitting portion 11 of chip 201 and blocks B1 to B12 of the light-emitting portion 11 of chip 202. The first wiring 13 is connected to the controller 15 of the control chips 201 and 202.
[0057] A second wiring 14-1 (Phi2-1) is connected to the transmission section 12 of chip 201. Figure 2In this example, the second wiring 14-1 is a wiring that connects to blocks B1 to B12 of the light-emitting portion 11 of the chip 201, which constitutes a plurality of light-emitting element array groups. The second wiring 14-1 is connected to the controller 15 of the control chips 201 and 202. The transmission portion 12 of the chip 201 causes blocks B1 to B12 of the light-emitting portion 11 of the chip 201 to emit light via the first wiring 13 and the second wiring 14-1.
[0058] A second wiring 14-2 (Phi2-2) is connected to the transmission section 12 of chip 202. Figure 2 In this example, the second wiring 14-2 is a wiring that connects to blocks B1 to B12 of the light-emitting portion 11 of the chip 202, which constitutes a plurality of light-emitting element array groups. The second wiring 14-2 is connected to the controller 15 of the control chips 201 and 202. The transmission portion 12 of the chip 202 causes blocks B1 to B12 of the light-emitting portion 11 of the chip 202 to emit light via the first wiring 13 and the second wiring 14-2.
[0059] Thus, in Figure 2 In the example, chips 201 and 202 are arranged in a relative manner. Therefore, for example, it is possible to simultaneously illuminate blocks B3 and B4 adjacent in the main scanning direction in the light-emitting portion 11 of chip 201 and blocks B9 and B10 adjacent in the main scanning direction in the light-emitting portion 11 of chip 202. Figure 3 As shown, since blocks B3 and B4 of chip 201 and blocks B9 and B10 of chip 202 form the same line in the main scanning direction, the above-mentioned line scanning is achieved.
[0060] <Comparative Example>
[0061] Figure 3 (A) is a diagram showing the structure of a conventional light-emitting device. Figure 3 (B) is a timing diagram explaining the operation of the light-emitting section and the transmission section of a conventional light-emitting device. Figure 3 In the timing diagram (B), "H" represents a high-level potential, and "L" represents a low-level potential. Furthermore, it is assumed that time flows from left to right in the diagram. Figure 1 In the timing diagram of (B), Phi1 (master) represents the first wiring and Phi2 represents the second wiring.
[0062] Conventional light-emitting devices and the above Figure 2 and Figure 3The light-emitting device 1 of this embodiment also includes a light-emitting section and a transmission section, and the combination of the light-emitting section and the transmission section constitutes a chip. In the light-emitting section, the blocks are arranged in 2 rows and 6 columns facing the transmission section, with odd-numbered blocks arranged on the first side of the main scanning direction and even-numbered blocks arranged on the second side of the main scanning direction. The transmission section has 24 transmission thyristors, and each transmission thyristor is marked with a number "1" to "24".
[0063] In conventional light-emitting devices, because a second wiring is connected to each chip, the block illuminated by each chip is designated. Specifically, such as... Figure 1 As shown in (B), blocks B1 to B12 are sequentially illuminated using a first signal transmitted from the transmission unit to the light-emitting unit via a common first wiring and a second signal transmitted from the transmission unit to the light-emitting unit via a second wiring connected to each chip.
[0064] However, conventional light-emitting devices are different from the above. Figure 2 and Figure 4 The light-emitting device 1 shown in this embodiment differs from the one shown in that only the even-numbered transmission thyristors among the 24 transmission thyristors in the transmission section share the first wiring (Phi1(master)) connected to the light-emitting section. Therefore, it is not possible to simultaneously illuminate two adjacent blocks in the main scanning direction.
[0065] <Variation Example 1>
[0066] Figure 4 This diagram illustrates a specific example of a light-emitting device 1 according to this embodiment having two chips composed of a combination of a light-emitting part 11 and a transmission part 12.
[0067] As described above, line scanning can be achieved by arranging multiple chips, which are composed of a combination of a light-emitting unit 11 and a transmission unit 12, side by side along the main scanning direction. Figure 4 This illustrates an example of a light-emitting device 1 that achieves line scanning by arranging two chips 401 and 402 in a manner that is approximately mirror-symmetrical along the main scanning direction.
[0068] Figure 1 The structure of the chip 401 shown is the same as described above. Figure 4 The structure is the same as that of chip 101 shown in (A). That is, in the light-emitting part 11 of chip 401, each block is arranged in 2 rows and 6 columns toward the transmission part 12, with odd-numbered blocks arranged on the first side of the main scanning direction and even-numbered blocks arranged on the second side of the main scanning direction. Specifically, the odd-numbered blocks B1, B3, B5, B7, B9 and B11 arranged on the first side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side. In addition, the even-numbered blocks B2, B4, B6, B8, B10 and B12 arranged on the second side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side.
[0069] Figure 1 The structure of the chip 402 shown is also the same as described above. Figure 1 The structure of chip 101 shown in (A) is basically the same. That is, in the light-emitting part 11 of chip 402, each block is arranged in 2 rows and 6 columns toward the transmission part 12. However, since chip 402 is arranged in a manner that is approximately mirror-symmetrical to chip 401, the odd-numbered blocks are arranged on the second side of the main scanning direction, and the even-numbered blocks are arranged on the first side of the main scanning direction. Specifically, the odd-numbered blocks B1, B3, B5, B7, B9, and B11 arranged on the second side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side. In addition, the even-numbered blocks B2, B4, B6, B8, B10, and B12 arranged on the first side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side.
[0070] Each of chips 401 and 402 has a transmission section 12 equipped with 24 transmission thyristors, and each thyristor is marked with a number from "1" to "24". Furthermore, the connection method between the light-emitting section 11 and the transmission section 12 of chips 401 and 402 is similar to... Figure 4 The connection method of the light-emitting part 11 and the transmission part 12 of the chip 101 shown in (A) is basically the same, so the depiction of a part of the figure is omitted.
[0071] A first wiring 13 (Phi1 (master)) is connected to the respective transmission section 12 of chips 401 and 402. Figure 4 In this example, the first wiring 13 is a wiring that connects to blocks B1 to B12 of the light-emitting portion 11 of chip 401 and blocks B1 to B12 of the light-emitting portion 11 of chip 402. The first wiring 13 is connected to blocks B1 to B12 of the light-emitting portion 11 via terminal B of the transmission portion 12 of chip 401, and also to blocks B1 to B12 of the light-emitting portion 11 via terminal B of the transmission portion 12 of chip 402. Additionally, the first wiring 13 is connected to the controller 15 of the control chips 401 and 402.
[0072] Additionally, a second wiring 14 (Phi2) is connected to the transmission section 12 of both chips 401 and 402. Figure 4 In this example, the second wiring 14 is a wiring that is connected to blocks B1 to B12 of the light-emitting portion 11 of chip 401 and chip 402, which respectively constitute multiple light-emitting element array groups. The second wiring 14 is connected to blocks B1 to B12 of the light-emitting portion 11 via terminal A of the transmission portion 12 of chip 401, and also to blocks B1 to B12 of the light-emitting portion 11 via terminal A of the transmission portion 12 of chip 402. The second wiring 14 is connected to the controller 15 of the control chips 401 and 402.
[0073] The transmission section 12 of chip 401 emits light from blocks B1 to B12 of the light-emitting section 11 via the first wiring 13 and the second wiring 14. Similarly, the transmission section 12 of chip 402 emits light from blocks B1 to B12 of the light-emitting section 11 via the first wiring 13 and the second wiring 14. That is, by arranging the two chips 401 and 402 in a substantially mirror-symmetrical manner along the main scanning direction, not only is the first wiring 13 shared, but the second wiring 14 is also shared.
[0074] Thus, in Figure 4 In the example, chips 401 and 402 are arranged in a manner that is approximately mirror-symmetrical along the main scanning direction. Therefore, for example, it is possible to simultaneously illuminate blocks B3 and B4 adjacent in the main scanning direction in the light-emitting portion 11 of chip 401 and blocks B3 and B4 adjacent in the main scanning direction in the light-emitting portion 11 of chip 402. Figure 5 As shown, since blocks B3 and B4 of chip 401 and blocks B3 and B4 of chip 402 form the same line in the main scanning direction, the above-mentioned line scanning is achieved.
[0075] <Variation Example 2>
[0076] Figure 5 This diagram illustrates a specific example of a light-emitting device 1 according to this embodiment having two chips composed of a combination of a light-emitting part 11 and a transmission part 12.
[0077] As described above, line scanning can be achieved by arranging multiple chips, which are composed of a combination of a light-emitting unit 11 and a transmission unit 12, side by side along the main scanning direction. Figure 5 This illustrates an example of a light-emitting device 1 that achieves line scanning by arranging two chips 501 and 502 in a manner that is approximately point-symmetrical along the main scanning direction.
[0078] Figure 1 The structure of the chip 501 shown is the same as described above. Figure 5 The structure is the same as that of chip 101 shown in (A). That is, in the light-emitting part 11 of chip 501, each block is arranged in 2 rows and 6 columns toward the transmission part 12, with odd-numbered blocks arranged on the first side of the main scanning direction and even-numbered blocks arranged on the second side of the main scanning direction. Specifically, the odd-numbered blocks B1, B3, B5, B7, B9 and B11 arranged on the first side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side. In addition, the even-numbered blocks B2, B4, B6, B8, B10 and B12 arranged on the second side of the main scanning direction are arranged in this order from the third side of the sub-scanning direction toward the fourth side.
[0079] Figure 1The chip 502 shown is configured such that, during a shift operation, the lighting order is reversed, starting from the first wiring 13 (Phi1 (master)) and starting from the second wiring 14 (Phi2). However, other structures are the same as described above. Figure 1 The structure of chip 101 shown in (A) is basically the same. Furthermore, a structure is known that has multiple blocks performing shift operations and shift signal lines commonly disposed in the multiple blocks and selected according to a shift signal to perform the shift operation. In this structure, the states are reversed in each block, for example, the first block and the second block. In contrast, in this embodiment, this circuit structure is applied to the chip to designate blocks in a point-symmetrical state such that the chip transmitting signals to it in the forward direction and the chip transmitting signals to it in the reverse direction are in a point-symmetric relative state.
[0080] Here, in the light-emitting section 11 of chip 502, each block is arranged in 2 rows and 6 columns toward the transmission section 12. However, chip 502 is arranged in a manner that is approximately point-symmetrical to chip 501, so the odd-numbered blocks are arranged on the second side of the main scanning direction, and the even-numbered blocks are arranged on the first side of the main scanning direction. Specifically, the odd-numbered blocks B1, B3, B5, B7, B9, and B11 arranged on the second side of the main scanning direction are arranged in this order from the fourth side of the sub-scanning direction toward the third side. In addition, the even-numbered blocks B2, B4, B6, B8, B10, and B12 arranged on the first side of the main scanning direction are arranged in this order from the fourth side of the sub-scanning direction toward the third side.
[0081] Each of chips 501 and 502 has a transmission section 12 equipped with 24 transmission thyristors, and each thyristor is marked with a number from "1" to "24". Furthermore, the connection method between the light-emitting section 11 and the transmission section 12 of chips 501 and 502 is similar to... Figure 5 The connection method of the light-emitting part 11 and the transmission part 12 of the chip 101 shown in (A) is basically the same, so the depiction of a part of the figure is omitted.
[0082] A first wiring 13 (Phi1(master)) is connected to the transmission section 12 of each of chips 501 and 502. Furthermore, the first wiring 13 is connected to the controller 15 of the control chips 501 and 502. Figure 5 In this example, the first wiring 13 is a wiring that is connected to blocks B1 to B12 of the light-emitting portion 11 of chip 501 and blocks B1 to B12 of the light-emitting portion 11 of chip 502. The first wiring 13 is connected to blocks B1 to B12 of the light-emitting portion 11 via terminal A of the transmission portion 12 of chip 501, and is also connected to blocks B1 to B12 of the light-emitting portion 11 via terminal B of the transmission portion 12 of chip 502. That is, the terminals of the first wiring 13 connected to the transmission portion 12 are reversed in chip 501 and chip 502 (A and B are reversed). Figure 5In the example, chips 501 and 502 transmit signals in opposite directions when the signal starts from the first wiring 13 (Phi1 (master)) and when it starts from the second wiring 14 (Phi2). As a result, terminals A and B in chips 501 and 502 are reversed, so the blocks side by side with the point-symmetric chips light up simultaneously.
[0083] exist Figure 5 In the example, four blocks arranged in a row along the main scanning direction in chips 501 and 502 are designated to be lit simultaneously. For instance, blocks B1 and B2 adjacent to each other in the main scanning direction in the light-emitting portion 11 of chip 501 and blocks B11 and B12 adjacent to each other in the main scanning direction in the light-emitting portion 11 of chip 502 are designated to be lit simultaneously. Additionally, blocks B3 and B4 adjacent to each other in the main scanning direction in the light-emitting portion 11 of chip 501 and blocks B9 and B10 adjacent to each other in the main scanning direction in the light-emitting portion 11 of chip 502 are designated to be lit simultaneously.
[0084] In addition, combinations of blocks B5 and B6 of chip 501 and blocks B7 and B8 of chip 502, as well as combinations of blocks B7 and B8 of chip 501 and blocks B5 and B6 of chip 502, are also designated and lit simultaneously. Furthermore, combinations of blocks B9 and B10 of chip 501 and blocks B3 and B4 of chip 502, as well as combinations of blocks B11 and B12 of chip 501 and blocks B1 and B2 of chip 502, are also designated and lit simultaneously.
[0085] Additionally, a second wiring 14 (Phi2) is connected to the transmission section 12 of both chips 501 and 502. Figure 5 In this example, the second wiring 14 is a wiring that is connected to blocks B1 to B12 of the light-emitting portion 11 of chip 501 and blocks B1 to B12 of the light-emitting portion 11 of chip 502, which respectively constitute multiple light-emitting element array groups. The second wiring 14 is connected to blocks B1 to B12 of the light-emitting portion 11 via terminal B of the transmission portion 12 of chip 501, and is connected to blocks B1 to B12 of the light-emitting portion 11 via terminal A of the transmission portion 12 of chip 502. That is, the terminals of the second wiring 14 connected to the transmission portion 12 are reversed in chip 501 and chip 502 (A and B are reversed). In addition, the second wiring 14 is connected to the controller 15 that controls chips 501 and 502.
[0086] The transmission section 12 of chip 501 emits light from blocks B1 to B12 of the light-emitting section 11 via the first wiring 13 and the second wiring 14. Similarly, the transmission section 12 of chip 502 emits light from blocks B1 to B12 of the light-emitting section 11 via the first wiring 13 and the second wiring 14. That is, by arranging the two chips 501 and 502 in a manner that is approximately point-symmetrical along the main scanning direction, not only is the first wiring 13 shared, but the second wiring 14 is also shared.
[0087] Thus, in Figure 5 In the example, chips 501 and 502 are arranged in a manner that is approximately point-symmetrical along the main scanning direction. Therefore, for example, it is possible to simultaneously illuminate blocks B3 and B4 adjacent in the main scanning direction in the light-emitting portion 11 of chip 501 and blocks B9 and B10 adjacent in the main scanning direction in the light-emitting portion 11 of chip 502. Figure 6 As shown, because blocks B3 and B4 of chip 501 and blocks B9 and B10 of chip 502 form the same line in the main scanning direction, the above-mentioned line scanning is achieved.
[0088] <Variation Example 3>
[0089] Figure 6 This diagram illustrates a specific example of a light-emitting device 1 according to this embodiment having four chips composed of a combination of a light-emitting section 11 and a transmission section 12.
[0090] As described above, line scanning can be achieved by arranging multiple chips, which are composed of a combination of a light-emitting unit 11 and a transmission unit 12, side by side along the main scanning direction. Figure 6 This describes an example of a light-emitting device 1 that achieves line scanning by arranging chips 601 and 602 and chips 603 and 604 in a manner that is approximately point-symmetrical along the main scanning direction when four chips 601 to 604 are configured.
[0091] Figure 5 The structures of chips 601 and 602 shown are respectively the same as those described above. Figure 6 The chips 501 and 502 shown have the same structure. Additionally, Figure 5 The structures of chips 603 and 604 shown are also the same as those described above. Figure 6 Chips 501 and 502 shown have identical structures. Therefore, a portion of the drawing is omitted.
[0092] Each of the transmission sections 12 of chips 601 to 604 is connected to a first wiring 13 (Phi1 (master)). Figure 6In the example, the first wiring 13 is a wiring that is connected to blocks B1 to B12 of the light-emitting parts 11 of each of the chips 601 to 604. The first wiring 13 is connected to blocks B1 to B12 of the light-emitting parts 11 via terminal A of the transmission part 12 of the chip 601, and is also connected to blocks B1 to B12 of the light-emitting parts 11 via terminal B of the transmission part 12 of the chip 602.
[0093] Additionally, the first wiring 13 is connected to blocks B1 to B12 of the light-emitting unit 11 via terminal A of the transmission section 12 of chip 603, and is also connected to blocks B1 to B12 of the light-emitting unit 11 via terminal B of the transmission section 12 of chip 604. Furthermore, the first wiring 13 is connected to the controller 15 of the control chips 601 to 604.
[0094] Additionally, a second wiring 14 (Phi2) is connected to the transmission section 12 of each of chips 601 to 604. Figure 6 In this example, the second wiring 14 is a wiring that is connected to blocks B1 to B12 of the light-emitting portions 11 of each of the chips 601 to 604, which respectively constitute multiple light-emitting element array groups. The second wiring 14 is connected to blocks B1 to B12 of the light-emitting portions 11 via terminal B of the transmission section 12 of the chip 601, and is also connected to blocks B1 to B12 of the light-emitting portions 11 via terminal A of the transmission section 12 of the chip 602.
[0095] Furthermore, the second wiring 14 is connected to blocks B1 to B12 of the light-emitting unit 11 via terminal B of the transmission section 12 of chip 603, and is also connected to blocks B1 to B12 of the light-emitting unit 11 via terminal A of the transmission section 12 of chip 604. Additionally, the second wiring 14 is connected to the controller 15 of the control chips 601 to 604.
[0096] The transmission section 12 of each of chips 601 to 604 emits light from blocks B1 to B12 of the light-emitting section 11 of each of chips 601 to 604 via the first wiring 13 and the second wiring 14. That is, when configuring four chips 601 to 604, by arranging chips 601 and 602 and chips 603 and 604 in a manner that is approximately point-symmetrical along the main scanning direction, not only is the first wiring 13 shared, but the second wiring 14 is also shared.
[0097] Thus, in Figure 6 In the example, chips 601 and 602, and chips 603 and 604 are arranged in a roughly point-symmetrical manner along the main scanning direction. Therefore, for example, blocks B3 and B4 of chip 601, blocks B9 and B10 of chip 602, blocks B3 and B4 of chip 603, and blocks B9 and B10 of chip 604 can be lit simultaneously. Figure 6As shown, blocks B3 and B4 of chip 601 and blocks B9 and B10 of chip 602 form the same line in the main scan direction. Furthermore, blocks B3 and B4 of chip 603 and blocks B9 and B10 of chip 604 form the same line in the main scan direction. Therefore, Figure 7 The light-emitting device 1 achieves the above-mentioned line scanning.
[0098] Furthermore, when it is desired to illuminate the light-emitting portions 11 of chips 601 and 602 respectively, but not the light-emitting portions 11 of chips 603 and 604 respectively, the controller 15 performs the same control.
[0099] <Variation Example 4>
[0100] Figure 7 This diagram illustrates a specific example of a light-emitting device 1 according to this embodiment having eight chips composed of a combination of a light-emitting section 11 and a transmission section 12.
[0101] As described above, line scanning can be achieved by arranging multiple chips, which are composed of a combination of a light-emitting unit 11 and a transmission unit 12, side by side along the main scanning direction. Figure 7 This describes an example of a light-emitting device 1 that achieves line scanning by arranging four opposing groups of chips in a manner that is approximately point-symmetrical along the main scanning direction when configuring eight chips 701 to 708.
[0102] like Figure 5 As shown, the structures of chips 701 and 702, chips 703 and 704, chips 705 and 706, and chips 707 and 708 are respectively the same as those described above. Figure 7 Chips 501 and 502 shown have identical structures. Therefore, a portion of the drawing is omitted.
[0103] Each of the transmission sections 12 of chips 701 to 708 is connected to a first wiring 13 (Phi1 (master)). Figure 7 In the example, the first wiring 13 is a wiring that is connected to blocks B1 to B12 of the light-emitting parts 11 of each of the chips 701 to 708. The first wiring 13 is connected to blocks B1 to B12 of the light-emitting parts 11 via terminal A of the transmission part 12 of the chip 701, and is also connected to blocks B1 to B12 of the light-emitting parts 11 via terminal B of the transmission part 12 of the chip 702.
[0104] Furthermore, the first wiring 13 is connected to blocks B1 to B12 of the light-emitting section 11 via terminal A of the transmission section 12 of chip 703, and is also connected to blocks B1 to B12 of the light-emitting section 11 via terminal B of the transmission section 12 of chip 704. Additionally, the first wiring 13 is connected to blocks B1 to B12 of the light-emitting section 11 via terminal A of the transmission section 12 of chip 705, and is also connected to blocks B1 to B12 of the light-emitting section 11 via terminal B of the transmission section 12 of chip 706.
[0105] Additionally, the first wiring 13 is connected to blocks B1 to B12 of the light-emitting unit 11 via terminal A of the transmission section 12 of chip 707, and is also connected to blocks B1 to B12 of the light-emitting unit 11 via terminal B of the transmission section 12 of chip 708. Furthermore, the first wiring 13 is connected to the controller 15 of the control chips 701 to 708.
[0106] Additionally, a second wiring 14 (Phi2) is connected to the transmission section 12 of each of chips 701 to 708. Figure 7 In this example, the second wiring 14 is a wiring that is connected to blocks B1 to B12 of the light-emitting portions 11 of each of the chips 701 to 708, which respectively constitute multiple light-emitting element array groups. The second wiring 14 is connected to blocks B1 to B12 of the light-emitting portions 11 via terminal B of the transmission section 12 of the chip 701, and is also connected to blocks B1 to B12 of the light-emitting portions 11 via terminal A of the transmission section 12 of the chip 702.
[0107] Furthermore, the second wiring 14 is connected to blocks B1 to B12 of the light-emitting section 11 via terminal B of the transmission section 12 of chip 703, and is also connected to blocks B1 to B12 of the light-emitting section 11 via terminal A of the transmission section 12 of chip 704. Additionally, the second wiring 14 is connected to blocks B1 to B12 of the light-emitting section 11 via terminal B of the transmission section 12 of chip 705, and is also connected to blocks B1 to B12 of the light-emitting section 11 via terminal A of the transmission section 12 of chip 706.
[0108] Furthermore, the second wiring 14 is connected to blocks B1 to B12 of the light-emitting unit 11 via terminal B of the transmission section 12 of chip 707, and is also connected to blocks B1 to B12 of the light-emitting unit 11 via terminal A of the transmission section 12 of chip 708. Additionally, the second wiring 14 is connected to the controller 15 of the control chips 701 to 708.
[0109] Each of the transmission sections 12 of chips 701 to 708 emits light from blocks B1 to B12 of their respective light-emitting sections 11 via the first wiring 13 and the second wiring 14. That is, when eight chips 701 to 708 are configured, by arranging the four opposing groups of chips in a roughly point-symmetrical manner along the main scanning direction, not only is the first wiring 13 shared, but the second wiring 14 is also shared.
[0110] Thus, in Figure 7 In the example, the four sets of chips are arranged in a roughly point-symmetrical manner along the main scanning direction. Therefore, for example, it is possible to simultaneously light up blocks B3 and B4 of chips 701, 703, 705 and 707, and blocks B9 and B10 of chips 702, 704, 706 and 708.
[0111] like Figure 7 As shown, blocks B3 and B4 of chips 701 and 703, and blocks B9 and B10 of chips 702 and 704, form the same line in the main scanning direction. Furthermore, blocks B3 and B4 of chips 705 and 707, and blocks B9 and B10 of chips 706 and 708, form the same line in the main scanning direction. Therefore, Figure 1 The light-emitting device 1 achieves the above-mentioned line scanning.
[0112] Furthermore, when it is desired to illuminate the light-emitting portions 11 of chips 701 to 704 but not the light-emitting portions 11 of chips 705 to 708, the controller 15 is operated in this manner. Similarly, when it is desired to illuminate the light-emitting portions 11 of chips 705 to 708 but not the light-emitting portions 11 of chips 701 to 704, the controller 15 is operated in this manner.
[0113] <Other Implementation Methods>
[0114] The embodiments described above are for illustrative purposes only; however, the present invention is not limited to the embodiments described above. Furthermore, the effects of the present invention are not limited to those described in the embodiments above. For example, Figure 2 (A) Figures 4 to 7 , The structures of the light-emitting devices 1 shown are merely illustrative examples for achieving the purpose of this invention and are not particularly limited.
[0115] Furthermore, in the above embodiments, specific examples were given for cases where the two opposing chips are approximately mirror-symmetrical or approximately point-symmetrical, but this is not a limitation. For example, the two opposing chips may also be approximately line-symmetrical.
[0116] (Postscript) (((1)))
[0118] A light-emitting device having:
[0119] Multiple light-emitting element arrays, wherein each of the multiple light-emitting element arrays has multiple light-emitting elements;
[0120] The first wiring is connected to the plurality of light-emitting element arrays;
[0121] The second wiring, the second wiring being connected to each of the plurality of light-emitting element array groups formed by dividing the plurality of light-emitting element arrays; and
[0122] The transmission unit includes multiple transmission thyristors, which control the lighting of the multiple light-emitting elements in each of the multiple light-emitting element arrays via the first wiring and the second wiring.
[0123] The number of transmission thyristors is greater than the number of light-emitting element arrays, and adjacent transmission thyristors are connected to the same first light-emitting element array in the plurality of light-emitting element arrays. (((2)))
[0125] According to the light-emitting device described in ((1)), wherein,
[0126] The second light-emitting element array in the plurality of light-emitting element arrays is adjacent to the first light-emitting element array and is lit simultaneously. The second light-emitting element array is connected to a transmission thyristor disposed next to the transmission thyristor connected to the first light-emitting element array. (((3)))
[0128] According to the light-emitting device described in ((1)) or ((2)), wherein,
[0129] The plurality of light-emitting elements constituting the first light-emitting element array are arranged to be relatively long in the direction in which the plurality of light-emitting element arrays are simultaneously lit. (((4)))
[0131] According to the light-emitting device described in ((3)), wherein,
[0132] The array of multiple light-emitting elements has two elements arranged in the adjacent direction and n elements arranged in the direction orthogonal to the adjacent direction (n is an integer value of 2 or more). (((5)))
[0134] According to the light-emitting device described in ((2)) or ((3)), wherein,
[0135] The combination of the transmission unit and the plurality of light-emitting element arrays forms a chip, and two light-emitting element arrays of the chip, arranged in an opposing manner, are simultaneously lit in the adjacent direction. (((6)))
[0137] According to the light-emitting device described in ((5)), wherein,
[0138] The two chips share a line connected to the first wiring. (((7)))
[0140] According to the light-emitting device described in ((6)), wherein,
[0141] The two chips, configured in a relative manner, have a structure that is approximately linearly symmetrical. (((8)))
[0143] According to the light-emitting device described in ((6)), wherein,
[0144] Regarding the two chips, the connections of the first wiring and the second wiring connecting the light-emitting element array and the transmission section are approximately mirror-symmetrical.
[0145] Share the line connected to the second wiring. ((9)))
[0147] According to the light-emitting device described in ((6)), wherein,
[0148] The two chips, configured in a relative manner, have a structure that is approximately point-symmetrical.
[0149] According to (((1)), it is possible to increase the number of independently controllable light-emitting element arrays while suppressing the increase in the number of signal lines.
[0150] According to ((2)), it is possible to simultaneously illuminate multiple adjacent arrays of light-emitting elements. As a result, line scanning can be achieved.
[0151] According to ((3)), it is possible to simultaneously illuminate multiple light-emitting element arrays in a linear pattern for a longer period. As a result, the range of paper sizes that can be scanned in a line is expanded.
[0152] According to (((4)), the range of possible combinations of multiple light-emitting element arrays is expanded, not limited to the 2 rows and 6 columns of the implementation.
[0153] According to ((5)), wiring can be shared between chips.
[0154] According to ((6)), wiring can be shared between chips.
[0155] According to (((7)), wiring can be shared between chips.
[0156] According to ((8)), it is possible to suppress the increase in the types of chips and achieve mass production, while sharing signals.
[0157] According to (9), it is possible to suppress the increase in the types of chips and achieve mass production, while sharing signals.
Claims
1. A light-emitting device, characterized in that, have: Multiple light-emitting element arrays, wherein each of the multiple light-emitting element arrays has multiple light-emitting elements; The first wiring is connected to the plurality of light-emitting element arrays; The second wiring is connected to each of the multiple light-emitting element array groups formed by dividing the multiple light-emitting element arrays; as well as The transmission unit includes multiple transmission thyristors, which control the lighting of the multiple light-emitting elements in each of the multiple light-emitting element arrays via the first wiring and the second wiring. The number of transmission thyristors is greater than the number of light-emitting element arrays, and adjacent transmission thyristors are connected to the same first light-emitting element array in the plurality of light-emitting element arrays.
2. The light-emitting device according to claim 1, wherein, The second light-emitting element array in the plurality of light-emitting element arrays is adjacent to the first light-emitting element array and is lit simultaneously. The second light-emitting element array is connected to a transmission thyristor disposed next to the transmission thyristor connected to the first light-emitting element array.
3. The light-emitting device according to claim 1 or 2, wherein, The plurality of light-emitting elements constituting the first light-emitting element array are arranged to be relatively long in the direction in which the plurality of light-emitting element arrays are simultaneously lit.
4. The light-emitting device according to claim 3, wherein, The plurality of light-emitting element arrays are arranged in two in the adjacent direction and in n in the direction orthogonal to the adjacent direction, where n is an integer value of 2 or more.
5. The light-emitting device according to claim 2 or 3, wherein, The combination of the transmission unit and the plurality of light-emitting element arrays forms a chip, and two light-emitting element arrays of the chip, arranged in an opposing manner, are simultaneously lit in the adjacent direction.
6. The light-emitting device according to claim 5, wherein, The two chips share a line connected to the first wiring.
7. The light-emitting device according to claim 6, wherein, The two chips, configured in a relative manner, have a structure that is approximately linearly symmetrical.
8. The light-emitting device according to claim 6, wherein, Regarding the two chips mentioned above, The connections of the first wiring and the second wiring connecting the light-emitting element array and the transmission section are approximately mirror-symmetrical. Share the line connected to the second wiring.
9. The light-emitting device according to claim 6, wherein, The two chips, configured in a relative manner, have a structure that is approximately point-symmetrical.
Citation Information
Patent Citations
Semiconductor pressure transducer
JP1978016589A
Light-emitting device, light source device, and measurement device
JP2023112927A