Lighting control device and lighting control method for vehicle lamp, and vehicle lamp system

Abstract

The present invention aims to reduce the discomfort felt when providing sequential turn signals. A lighting control device for a vehicle lamp is provided, configured to control the lighting of the vehicle lamp. The lighting control device controls the vehicle lamp so that a bright spot, obtained by lighting a portion of the vehicle lamp's light-emitting region, moves in a predetermined direction within the light-emitting region. The bright spot is moved so that a first region, a portion of the region corresponding to the bright spot during a first period, partially overlaps with a second region, a portion of the region corresponding to the bright spot during a subsequent second period.

Description

Technical Field

[0001] The present invention relates to a vehicle lamp system used as, for example, a turn signal lamp (a blinker). Background Art

[0002] As a type of vehicle turn signal, a type of turn signal in which multiple light-emitting components are sequentially illuminated with time differences is known (see, for example, Patent Document 1). This lighting method is referred to herein as sequential turn signaling. A vehicle lamp that performs this sequential turn signaling is, for example, controlled to repeatedly perform the following operation: after each light-emitting component is sequentially illuminated from the inside of the vehicle toward the outside, all light-emitting components are simultaneously extinguished.

[0003] In a vehicle lamp that performs sequential turn signals as described above, it is considered to increase the size of the area (bright spot) that lights up at a certain time to further improve its visual recognition. In this case, for example, it is considered to light up multiple light-emitting parts at the same time at each specified time, or to increase the size of each light-emitting part itself. However, since there is a limit to the width of the place where the turn signal can be set, it is not possible to make the number of bright spots that can be formed from one end to the other end of the turn signal so large. Therefore, for example, in the case where the bright spot is moved faster, the movement of the bright spot ends immediately, which may cause a sense of incongruity as a sequential turn signal. On the other hand, for example, in the case where the bright spot is moved slower, the movement of the bright spot will not end immediately, but the movement will not become smooth, so it will still cause a sense of incongruity as a sequential turn signal.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6066829 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] One of the objects of a specific embodiment of the present invention is to provide a technique that can reduce the uncomfortable feeling when providing sequential turn instructions.

[0009] Means for solving problems

[0010] [1] The present invention relates to a lighting control device for a vehicle lamp in one embodiment, which (a) is a control device for controlling the lighting of the vehicle lamp, and (b) performs the following control: a bright spot obtained by lighting a part of the light-emitting area of ​​the vehicle lamp moves in a predetermined direction within the light-emitting area, and at this time, the bright spot is moved in such a way that a first area, a part of the area corresponding to the bright spot in a first period, and a second area, a part of the area corresponding to the bright spot in a subsequent second period, partially overlap.

[0011] [2] The present invention relates to a lighting control device for a vehicle lamp in one embodiment, which (a) is a control device for controlling the lighting of the vehicle lamp, and (b) controls the lighting and extinguishing of a light-emitting area of ​​the vehicle lamp, and controls the following: a dark spot obtained by extinguishing a part of the light-emitting area during the lighting period is moved in a specified direction within the light-emitting area, and at this time, the dark spot is moved in a manner such that a first area, a part of the area corresponding to the dark spot in a first period, and a second area, a part of the area corresponding to the dark spot in a subsequent second period, partially overlap.

[0012] [3] The present invention relates to a method for controlling the lighting of a vehicle lamp, (a) a method for controlling the lighting of a vehicle lamp, and (b) a method for controlling the lighting of a vehicle lamp, wherein a bright spot obtained by lighting a portion of a light-emitting area of ​​the vehicle lamp is moved in a predetermined direction within the light-emitting area, and the bright spot is moved so that a first area, a portion of an area corresponding to the bright spot in a first period, and a second area, a portion of an area corresponding to the bright spot in a subsequent second period, partially overlap.

[0013] [4] The present invention relates to a method for controlling the lighting of a vehicle lamp, which includes (a) controlling the lighting of the vehicle lamp, and (b) controlling the lighting and extinguishing of a light-emitting area of ​​the vehicle lamp, and controlling the dark spot obtained by extinguishing a portion of the light-emitting area during the lighting period to move in a predetermined direction within the light-emitting area, wherein the dark spot is moved in such a manner that a first region, a portion of the area corresponding to the dark spot in a first period, and a second region, a portion of the area corresponding to the dark spot in a subsequent second period, partially overlap.

[0014] [5] A vehicle lighting system according to one embodiment of the present invention includes any one of the above-mentioned lighting control devices and a vehicle lighting device controlled by the lighting control device.

[0015] According to the above configuration, it is possible to reduce the uncomfortable feeling when performing sequential turn instructions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a block diagram showing the configuration of a vehicle lighting system according to one embodiment.

[0017] Figure 2 It is a plan view showing the external structure of the lamp unit.

[0018] Figure 3 It is a diagram for explaining the operating state of the vehicle lighting system according to the present embodiment.

[0019] Figure 4 (A)~ Figure 4 (D) is a timing chart showing the driving current waveform of the LED corresponding to each light emitting portion of the lamp unit.

[0020] Figure 5 (A) Figure 5 (B) is a diagram for explaining another operating state of the vehicle lighting system.

[0021] Figure 6 (A)~ Figure 6 (D) is a diagram for explaining other operating states of the vehicle lighting system.

[0022] Figure 7 It is a diagram for explaining the operating state of a vehicle lighting system according to a modified example.

[0023] Figure 8 (A)~ Figure 8 (D) is a timing chart showing a driving current waveform of an LED corresponding to each light emitting portion of the lamp unit in a modified example in which the dark spot is moved. DETAILED DESCRIPTION

[0024] Figure 1 This is a block diagram showing the configuration of a vehicle lighting system according to one embodiment. The illustrated vehicle lighting system is used, for example, as a direction indicator (turn signal), and includes a control device 1 and a pair of lamp units (vehicle lighting) 2L and 2R whose operation is controlled by the control device 1.

[0025] When a turn signal indicating that the direction indicator has been operated is input from the vehicle, the control device 1 controls the lighting state of one of the lamp units 2L, 2R according to the turn signal to emit light indicating the traveling direction of the vehicle.

[0026] A pair of lamp units 2L and 2R each include a drive circuit 20 and an LED array 21. Lamp unit 2L is located on the left side of the front of the vehicle. Lamp unit 2R is located on the right side of the front of the vehicle. Alternatively, a pair of lamp units can be located on the left and right sides of the rear of the vehicle. For simplicity, this embodiment only considers the pair of lamp units 2L and 2R located on the front of the vehicle.

[0027] The drive circuit 20 supplies drive power to each LED (light emitting element) included in the LED array 21 to turn each LED on and off.

[0028] The LED array 21 includes a plurality of LEDs, and each LED emits light by the driving power supplied from the driving circuit 20 .

[0029] Figure 2: This is a top view showing the external structure of the lamp unit. Lamp unit 2L is shown here, but lamp unit 2R also has a bilaterally symmetrical and similar structure. As shown in the figure, lamp unit 2L has a plurality of (18 in the example shown) light-emitting sections 22 arranged from the inside (center side) of the vehicle to the outside of the vehicle. Each light-emitting section 22 corresponds to one or more LEDs included in the LED array 21, can be individually lit and extinguished by the control of the drive circuit 20, and its brightness (luminance) can be freely set. In addition, for the sake of convenience, each light-emitting section 22 corresponds to one LED.

[0030] Figure 3 1 and 2 are diagrams for explaining the operating state of the vehicle lighting system according to the present embodiment. Here, the lamp unit 2L is described, but the lamp unit 2R also operates in a similar manner with bilateral symmetry.

[0031] When a turn signal is input, at time t1, each LED corresponding to each of the light-emitting sections 22 of the lamp unit 2L, excluding two light-emitting sections 22 from the vehicle interior, is driven with a rated current, and each light-emitting section 22 emits light at a first brightness. Since the brightness of the corresponding LEDs in each light-emitting section 22 may vary, the "first brightness" described above does not necessarily have to be a fixed value; for example, it may be a brightness within a tolerance range of approximately ±10%.

[0032] At time t1, the LEDs corresponding to the two light-emitting sections 22 located from the inner side are temporarily driven with a current higher than the rated current, causing these light-emitting sections 22 to emit light at a second brightness higher than the first brightness. Consequently, a bright spot, or partial area, is formed in the area corresponding to the two light-emitting sections 22 located on the inner side of the vehicle, where the brightness is higher than that of the other light-emitting sections 22.

[0033] At the next moment t2, the driving current of the LED corresponding to one of the inner light-emitting sections 22 returns to the rated current, and light is emitted from this light-emitting section 22 at the first brightness. Furthermore, at this moment t2, the driving current of the LED corresponding to the second light-emitting section 22 from the inner side remains at a current higher than the rated current, and the driving current of the LED corresponding to the third light-emitting section 22 from the inner side is also temporarily driven at a current higher than the rated current. As a result, these two light-emitting sections 22 emit light at a second brightness higher than the first brightness. Consequently, the areas corresponding to the second and third light-emitting sections 22 from the inner side of the vehicle form partial areas, or bright spots, with a brightness higher than that of the other light-emitting sections 22.

[0034] Similarly, at times t3, t4, ..., and t9, the two light-emitting units 22 driven with a current higher than the rated current are sequentially switched. As shown in the figure, the bright spot formed by emitting light at the second brightness moves sequentially from the inside of the vehicle to the outside. Furthermore, as the bright spot moves, a portion of the area corresponding to the bright spot (the first area) during a first period (e.g., between t1 and t2), specifically, a portion on the side of the bright spot's movement, remains as part of the area corresponding to the bright spot (the second area) during the following second period (e.g., between t2 and t3), repeatedly remaining as part of the area corresponding to the bright spot (the second area). In this embodiment, a portion of the bright spot corresponds to a single light-emitting unit 22. By allowing a portion of the bright spot to remain until the next moment while causing it to undergo phi phenomenon movement, the size of the bright spot can be made relatively large and its movement can be smooth. Subsequently, for a certain period after time t19, all light-emitting units 22 are extinguished. After the extinguishing period, the next cycle begins, repeating the operation starting at time t1.

[0035] Each light emitting portion 22 of the lamp unit 2L maintains a state of emitting light at the first brightness as a whole during the period from time t1 to time t18. Hereinafter, this state is referred to as basic lighting. In this way, while each light emitting portion 22 is basically lit, a portion of the two light emitting portions 22 that are lit at the second brightness and emit light are repeatedly switched in sequence, so that the bright spots move in sequence. During a certain period after time t19, all the light emitting portions 22 are extinguished. By combining these actions, the lamp unit 2L as a whole repeatedly flashes (lights up and goes out) at regular intervals, and operates in a manner that moves the bright spot from the inside of the vehicle to the outside of the vehicle during the lighting period. That is, it is possible to achieve a display of a direction indication in which a sequential turn indication is superimposed on the previous simple flashing direction indication.

[0036] Furthermore, when providing a hazard signal instead of a turn signal, the lamp units 2L and 2R may be operated simultaneously by the above-mentioned control method.

[0037] Figure 4 (A)~ Figure 4 (D) is a timing chart showing the driving current waveform of the LED corresponding to each light emitting portion of the lamp unit. Here, the driving current for the lamp unit 2L is also described, but the same applies to the lamp unit 2R. Figure 4 (A) is the driving current waveform of the LED corresponding to the innermost light emitting portion 22, Figure 4 (B) is the driving current waveform of the LED corresponding to the second light-emitting portion 22 from the inner side. Figure 4 (C) is the driving current waveform of the LED corresponding to the third light-emitting portion 22 from the inner side, Figure 4 (D) is a driving current waveform of the LED corresponding to the outermost light emitting portion 22 .

[0038] like Figure 4 As shown in (A), at time t1, the driving current of the LED corresponding to the innermost light-emitting portion 22 is set higher than the rated current, and this state is maintained until time t2, after which the driving current returns to the rated current. As a result, during the period from time t1 to t2, the light emitted from the area corresponding to the light-emitting portion 22 reaches the second brightness, forming a bright spot in this area. In addition, as Figure 4 As shown in (B), at time t1, the driving current of the LED corresponding to the second light-emitting portion 22 from the inside is set to be higher than the rated current, and this state is maintained until time t3, after which the driving current returns to the rated current. As a result, during the period from time t1 to t3, the light emitted from the area corresponding to the light-emitting portion 22 becomes the second brightness, forming a bright spot in this area. By synthesizing these bright spots, a bright spot of a size corresponding to the two light-emitting portions 22 is formed between time t1 and t2 (refer to Figure 3 ). At this time, if Figure 4 (A)~ Figure 4 As shown in (D), the driving current of the LED corresponding to the other light emitting units 22 is set to the rated current, so the light emitted from each light emitting area corresponding to the other light emitting units 22 becomes the first brightness (basic lighting).

[0039] As described above, during the period from time t1 to t3, the light emitted from the area corresponding to the second light emitting portion 22 from the inner side becomes the second brightness, forming a bright spot in this area. Figure 4 As shown in (C), at time t2, the driving current of the LED corresponding to the third light-emitting portion 22 from the inside is set to be higher than the rated current, and this state is maintained until time t4, after which the driving current returns to the rated current. As a result, during the period from time t2 to t4, the light emitted from the area corresponding to the light-emitting portion 22 becomes the second brightness, forming a bright spot in this area. By synthesizing these bright spots, a bright spot of a size corresponding to the two light-emitting portions 22 is formed between time t2 and t3 (refer to Figure 3 ). At this time, if Figure 4 (A)~ Figure 4 As shown in (D), the driving current of the LED corresponding to the other light emitting units 22 is set to the rated current, so the light emitted from each light emitting area corresponding to the other light emitting units 22 becomes the first brightness (basic lighting).

[0040] The driving current is also supplied in the same manner at the following moments. Figure 4As shown in (D), at time t17, the driving current of the LED corresponding to the outermost light-emitting portion 22 is set to be higher than the rated current, and this state is maintained until time t19, after which the driving current returns to the rated current. As a result, during the period from time 17 to t19, the light emitted from the area corresponding to the light-emitting portion 22 becomes the second brightness, forming a bright spot in this area (refer to Figure 3 ). At this time, from time t17 to t18, the light emitted from the area corresponding to the left adjacent light emitting portion 22 also becomes the second brightness, and during this period, the size of the bright spot becomes the size corresponding to the two light emitting portions 22. In addition, as Figure 4 (A)~

[0041] Figure 4 As shown in (D), the driving current of the LED corresponding to the other light emitting units 22 is set to the rated current, so the light emitted from each light emitting area corresponding to the other light emitting units 22 becomes the first brightness (basic lighting).

[0042] Then, at time t19, the driving current to each light-emitting unit 22 is turned off, and each light-emitting unit 22 is turned off. This off period is set to, for example, the same length as the period from time t1 to time t19. Furthermore, the length from a certain time (e.g., time t1) to the next time (e.g., time t2) is preferably set to, for example, approximately 35 milliseconds.

[0043] By supplying the above-mentioned driving current from the driving circuit 20 to the LED array 21 under the control of the control device 1, it is possible to realize Figure 3 The conventional simple blinking direction indication is shown in a display in which a sequential turn signal is superimposed on the direction indication.

[0044] Figure 5 (A) Figure 5 (B) is a diagram for explaining other operating states of the vehicle lighting system. Figure 3 In the example shown, two light emitting units 22 are simultaneously lit at the second brightness to form a bright spot, but more light emitting units 22 may be simultaneously lit to form a bright spot. Figure 5 In the example shown in (A), three light-emitting units 22 are lit at the same time to form a bright spot. As time passes, one light-emitting unit 22 on the left goes out and is replaced by one light-emitting unit 22 on the right. As a result, the areas corresponding to two light-emitting units 22 in the bright spot overlap before and after the movement of the bright spot. Similarly, in Figure 5In the example shown in (B), three light-emitting units 22 are simultaneously illuminated to form a bright spot. Over time, the two light-emitting units 22 on the left turn off, and the two light-emitting units 22 on the right turn on instead. As a result, the area of ​​the bright spot corresponding to a single light-emitting unit 22 overlaps before and after the bright spot's movement. In other words, by continuously illuminating a number of light-emitting units 22 that is one less than the total number of light-emitting units 22 corresponding to the bright spot, overlapping areas can be created before and after the bright spot's movement. This approach allows the bright spot's size to be increased while maintaining smooth movement.

[0045] Figure 6 (A)~ Figure 6 (D) is a diagram for explaining other operating states of the vehicle lighting system. Here, the vertical axis corresponds to brightness, and the horizontal axis corresponds to the left and right position of the lamp unit 2L, indicating the brightness distribution of the light emitted from each light emitting portion 22. In the above embodiment, as Figure 6 As shown in (A), a portion of the area of ​​the first brightness corresponding to the basic lighting becomes an area of ​​the second brightness corresponding to the bright spot. Figure 6 As shown in (B), it is also possible to set a region with a brightness intermediate between the first brightness and the second brightness before returning from the second brightness region to the first brightness region. In the example shown in the figure, two levels of brightness are set during the period of returning from the second brightness to the first brightness, but it can also be set to one level, or to three or more levels. Similarly, for example, Figure 6 As shown in (C), a region with a brightness intermediate between the first brightness region and the second brightness region may be provided before the region changes from the first brightness region to the second brightness region. In the example shown in the figure, two levels of brightness are provided during the change from the first brightness to the second brightness, but it may be provided at one level or at least three levels. Figure 6 As shown in (D), areas of graded brightness may also be provided before and after the area of ​​the second brightness. These controls can be achieved by increasing or decreasing the driving current of the LEDs corresponding to the light-emitting units 22 of each area. In this way, by making the area corresponding to the bright spot have a brightness distribution in which the brightness gradually decreases in at least one or both of the same direction and the opposite direction as the moving direction of the bright spot, the sharp brightness change between the first brightness and the second brightness can be alleviated to obtain a smoother brightness change. In particular, by setting Figure 6 In the manner of (D), the change in brightness becomes smooth like a wave.

[0046] Furthermore, while the descriptions thus far illustrate multiple light-emitting sections arranged in the vehicle width direction, the arrangement of the light-emitting sections is not limited to this. For example, the light-emitting sections can be arranged from the lower side of the vehicle toward the upper side, or arranged in an oblique direction, or a combination of these arrangement directions. This allows the bright spot to move from the lower side of the vehicle toward the upper side, move in an oblique direction, or move in a direction combining these multiple movement directions. Furthermore, the shape and area of ​​the light-emitting sections do not need to be identical.

[0047] According to the above embodiment, it is possible to display a direction indication based on a simple flashing direction indication superimposed with a sequential turn indication, and the size of the bright spot at this time can be made relatively large and the movement can be smooth, thereby reducing the sense of incongruity when performing sequential turn indication.

[0048] Furthermore, the movement of the bright spot creates what's known as phi phenomenon movement. This allows for increased attention and salience of the direction indicator display, even without significantly increasing the brightness relative to the base illuminated area. This improves visual legibility without significantly increasing the drive current. Furthermore, the movement of the bright spot enhances instantaneous attention from all visual angles, achieving a striking new appearance.

[0049] Furthermore, since all areas other than the area corresponding to the bright spot are illuminated simultaneously as a base, compared to conventional sequential turn indicators, the illumination can be instantly confirmed at all visual angles within the light distribution range. This allows, for example, easy identification of the turn signal even if part of the lamp unit is obscured by an obstruction (e.g., a two-wheeled vehicle).

[0050] Furthermore, since the base lit area flickers on and off as a whole, the entire group of light-emitting units is recognized as a single group. This is based on the principle of common fate in Gestalt psychology. Since the bright spot moves (pseudo-motion) within the area recognized as a group, its movement does not hinder the recognition of the flickering of the entire group.

[0051] Furthermore, the present invention is not limited to the above-described embodiments and can be implemented with various modifications within the scope of the present invention. For example, in the above-described embodiments, the rising period of the basic lighting and the rising period of the initial bright spot are the same period, but the two periods can also be different periods. Similarly, although the falling period of the basic lighting and the falling period of the final bright spot are the same period, they can also be different periods. In addition, the repetition period of the bright spot movement can also be different from the repetition period of the basic lighting.

[0052] In addition, the movement speed of the bright spot may not be fixed; for example, it may gradually increase in speed, gradually decrease in speed, or change irregularly. Furthermore, the number of bright spots formed in a certain period is not limited to one; two or more bright spots may be formed and move in the same period. Furthermore, the area and shape of the bright spot may not necessarily be fixed; for example, the area may gradually increase in size, gradually decrease in size, or change irregularly in size and shape.

[0053] In the above-described embodiment, a case has been described where a bright spot is moved within a light-emitting region of basic lighting. However, a dark spot may be moved instead of a bright spot by similar control.

[0054] Figure 7 This diagram illustrates the operating state of a modified vehicle lighting system. As shown in the example, control is performed so that, instead of the bright spots in the aforementioned embodiment, dark spots (regions with a third brightness lower than the first brightness) are sequentially moved over time. In this case, control is performed so that a portion of the dark spots are repetitively moved.

[0055] Figure 8 (A)~ Figure 8 (D) is a timing chart showing a driving current waveform of an LED corresponding to each light emitting portion of the lamp unit in a modified example in which the dark spot is moved. Figure 8 (A) is the driving current waveform of the LED corresponding to the innermost light emitting portion 22, Figure 8 (B) is the driving current waveform of the LED corresponding to the second light-emitting portion 22 from the inner side. Figure 8 (C) is the driving current waveform of the LED corresponding to the third light-emitting portion 22 from the inner side, Figure 8 (D) is the driving current waveform for the LED corresponding to the outermost light-emitting portion 22. As shown in the figures, the driving current is set to be higher than the rated current when the light is bright, while the driving current is temporarily set to be lower than the rated current when the light is dark. In the example shown, the driving current is set to the same level as when the light is dark, but different levels are possible.

[0056] By supplying the above-mentioned driving current from the driving circuit 20 to the LED array 21 under the control of the control device 1, it is possible to realize Figure 7 The conventional simple blinking direction indication is superimposed with a direction indication display in which dark dots are moved in order of turning directions instead of bright dots, and the size of the bright dots can be made relatively large and the movement can be smooth.

[0057] In addition, in the above-mentioned embodiment, the present invention is applied to a vehicle lighting system used as a turn signal, but the scope of application of the present invention is not limited to this. The present invention can be applied to various vehicle lighting systems that are mounted on a vehicle and irradiate light to its surroundings.

[0058] Label Description

[0059] 1: Control device 2L, 2R: Lamp unit (vehicle lamp), 20: Drive circuit, 21: LED array, 22: Light emitting unit

Claims

1. A lighting control device for a vehicle lamp, which is used to control the lighting of a vehicle lamp having a plurality of light-emitting units. The lighting control device repeatedly controls the plurality of light emitting units to light up and turn off at a first brightness as a whole. The lighting control device performs the following control: during the period when the multiple light-emitting portions are lit at the first brightness, a bright spot obtained by temporarily lighting a part of the light-emitting area formed by lighting the multiple light-emitting portions at a second brightness higher than the first brightness is moved to a specified direction within the light-emitting area; at this time, the bright spot is moved in such a way that a part of the area corresponding to the bright spot in the first period, i.e., the first area, and a part of the area corresponding to the bright spot in the subsequent second period, i.e., the second area, partially overlap; and during the extinguishing period after the lighting period, all of the multiple light-emitting portions are extinguished.

2. The lighting control device for a vehicle lamp according to claim 1, wherein: A portion of the area corresponding to the bright spot is formed by lighting at least two of the plurality of light-emitting sections. The first area and the second area are partially overlapped by continuing to light up light emitting portions that are one or more less than the total number of the at least two light emitting portions corresponding to the first area in the first period in the second period.

3. The lighting control device for a vehicle lamp according to claim 1 or 2, wherein: The partial region corresponding to the bright spot has a brightness distribution in which the brightness gradually decreases toward at least one direction along the predetermined direction.

4. The lighting control device for a vehicle lamp according to claim 1 or 2, wherein: The prescribed direction is a direction from the inside toward the outside of the vehicle, a direction from the outside toward the inside of the vehicle, a direction from the bottom toward the top of the vehicle, or a direction from the top toward the bottom of the vehicle, or a direction formed by combining two or more of the above directions.

5. A lighting control method for a vehicle lamp, which is used to control the lighting of a vehicle lamp having a plurality of light-emitting units. In the lighting control method, the plurality of light emitting units are repeatedly controlled to be turned on and off at a first brightness as a whole. In the lighting control method, the following control is performed: during the period when the multiple light-emitting portions are lit at the first brightness, a bright spot obtained by temporarily lighting a portion of the light-emitting area formed by lighting the multiple light-emitting portions at a second brightness higher than the first brightness is moved in a specified direction within the light-emitting area. At this time, the bright spot is moved in a manner such that a portion of the area corresponding to the bright spot in the first period, i.e., the first area, and a portion of the area corresponding to the bright spot in the subsequent second period, i.e., the second area, partially overlap, and during the extinguishing period following the lighting period, all of the multiple light-emitting portions are extinguished.

6. A vehicle lighting system comprising: The lighting control device according to any one of claims 1 to 4; as well as A vehicle lamp is controlled by the lighting control device.

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