Light-emitting device for automotive sunroof with transformable display pattern

Abstract

The present invention discloses a lighting device for a car sunroof with changeable display patterns, which comprises a light guide layer, a lighting module and a fixing strip; a coating is provided on the first surface of the light guide layer, the coating has a first pattern and a second pattern, and a third pattern is provided on the second surface of the light guide layer; the lighting module includes a first lighting element, a second lighting element, a third lighting element and a limiting block; after the lighting module is arranged on the fixing strip, it is installed on the surface of the car sunroof together with the light guide layer; the first lighting element emits ultraviolet light to cause a fluorescence reaction of the first pattern; the second lighting element emits infrared light to cause a fluorescence reaction of the two patterns; the third lighting element emits primary colors of light to make the third pattern appear through reflection and refraction.

Description

Technical Field

[0001] The present invention relates to a lighting device installed on the surface of an automobile sunroof glass to create an atmosphere, in particular a lighting device for an automobile sunroof capable of changing display patterns. Background Art

[0002] The sunroof is a commonly configured device in automobiles. In addition to allowing good ventilation inside and outside the vehicle when the sunroof is opened, or allowing passengers to expose their bodies outside the vehicle to enjoy the fresh air in the suburbs, people also hope to enjoy the night sky view outside when the sunroof is closed. However, the functions of ordinary automobile sunroofs are limited to this. Therefore, in order to create an in-vehicle atmosphere to enhance the driving experience, the application of ambient lighting technology to automobile sunroofs has been widely used in the sunroofs of mid- to high-end vehicle models.

[0003] For example, Chinese Patent CN107471978A discloses a light-emitting window glass; Chinese Patent CN109624837B discloses a sunroof glass for adjusting the interior atmosphere; Chinese Patent CN103770696B discloses a glass for vehicle assembly. The light-emitting window glass disclosed in Chinese Patent CN107471978A includes a first transparent plate, a first transparent adhesive layer, a flexible transparent substrate, a second transparent adhesive layer, and a second transparent plate that are stacked in sequence from top to bottom. The refractive index of the second transparent adhesive layer is the same as that of the second transparent plate, the refractive index of the second transparent adhesive layer is greater than that of the flexible transparent substrate, and a linear light source is provided at the side edge of the second transparent plate, so that the incident light of the linear light source enters from the side edge of the second transparent plate and / or the second transparent adhesive layer, and is guided and transmitted between the second transparent plate and the second transparent adhesive layer. A scattering layer for scattering the incident light of the linear light source is provided on the lower surface of the flexible transparent substrate. The sunroof glass for adjusting the interior atmosphere disclosed in Chinese Patent CN109624837B includes a first glass plate, an adhesive layer, a flexible sheet layer, and a second glass plate that are stacked in sequence from top to bottom. A light source is arranged on the side of the second glass plate. The refractive index of the second glass plate is greater than that of the flexible sheet layer. A reflective pattern is provided on the lower surface of the flexible sheet layer. The boundary of the flexible sheet layer is shrunk inward by 3-30 mm relative to the boundary of the second glass plate. The adhesive layer and the second glass plate jointly enclose and cover the flexible sheet layer. The lower surface of the flexible sheet layer is closely attached to the upper surface of the second glass plate. The reflective pattern is directly made on the flexible sheet layer, so it can better fit the glass shape with a small curvature and a large arch height. The lower surface of the flexible sheet layer is closely attached to the upper surface of the second glass plate, and the reflective pattern is directly in contact with the upper surface of the second glass plate. The glass for vehicle assembly disclosed in Chinese Patent CN103770696B includes a glass plate, a light guide layer, a refractive layer, and a light source; the light guide layer is configured to guide the light coupled and input on its end surface and has a coupling output device, and the guided light is output through the coupling output device on at least one main surface of the light guide layer; the light guide layer is connected to the glass plate by material locking; the refractive layer is arranged between the glass plate and the light guide layer, the refractive layer has a lower refractive index than the light guide layer, and the refractive layer is simultaneously configured as a sheet layer; the light source is arranged to be light-coupled and input on at least one end surface of the light guide layer.

[0004] The common feature of the above-mentioned multiple disclosed patent documents is that they only enable the glass to have a light-emitting effect, or can only produce a single reflective pattern without a changing effect. In addition, no structure is configured to protect the light-emitting element, so that the light-emitting element is easily damaged by collision during assembly. Summary of the Invention

[0005] The present invention provides a light-emitting device for a car sunroof with a transformable display pattern.

[0006] The object of the present invention is to solve the problems that the existing automotive sunroof glass only has a lighting effect or can only produce a single reflective pattern without a changing effect, and the lighting elements are easily damaged by collision during assembly. The present invention is installed on the automotive sunroof glass and can change the displayed lighting pattern, creating a richer, more variable and more comfortable atmosphere inside the vehicle. The structure for protecting the lighting elements can prevent the lighting elements from being damaged by collision when the lighting device is assembled on the sunroof.

[0007] The technical solution adopted by the present invention for the above technical problems is: a lighting device for an automotive sunroof with a changeable display pattern, including: a light guide layer, a lighting module and a fixing strip. A coating with a first pattern is provided on the first surface of the light guide layer. The first pattern is formed by a first type of ink that fluoresces in response to ultraviolet light. A first adhesive layer is also provided around the first surface. A third pattern is formed on the second surface of the light guide layer opposite to the first surface. The third pattern is composed of a plurality of concave holes that can reflect and refract light. The lighting module includes a printed circuit board, at least one first lighting element arranged on the printed circuit board, and at least one limiting block. The first lighting element is used to emit ultraviolet light, and the limiting block is closer to one side of the printed circuit board than the first lighting element. The lighting module is arranged on the fixing strip, so that the light incident side of the light guide layer contacts the limiting block and is adjacent to the plurality of first lighting elements. A second adhesive layer is also provided on the fixing strip. The light guide layer is fixed to the surface of the automotive sunroof through the first adhesive layer, and the fixing strip is also fixed to the surface of the automotive sunroof through the second adhesive layer.

[0008] Preferably, there are at least two first lighting elements, and the first lighting elements are ultraviolet LEDs.

[0009] Preferably, at least one third lighting element is provided on the printed circuit board.

[0010] Preferably, there are at least two third lighting elements, and the third lighting elements are primary color LEDs.

[0011] Preferably, the coating further includes a second pattern, which is formed by a second type of ink that fluoresces in response to infrared light and does not overlap with the first pattern;

[0012] Preferably, at least one second lighting element is provided on the printed circuit board. The second lighting element is used to emit infrared light, and the limiting block is closer to one side of the printed circuit board than the second lighting element.

[0013] Preferably, there are at least two second lighting elements, and the second lighting elements are infrared LEDs.

[0014] Preferably, the third pattern is formed by laser engraving a plurality of concave holes on the second surface of the light guide layer.

[0015] Preferably, the first light-emitting elements are linearly arranged on the printed circuit board, and each of the limiting blocks is disposed between two adjacent first light-emitting elements.

[0016] Preferably, one first light-emitting element, one second light-emitting element, and one third light-emitting element are sequentially arranged to form a light-emitting unit, and a plurality of the light-emitting units are linearly arranged on the printed circuit board, and each of the limiting blocks is disposed between adjacent light-emitting units.

[0017] Preferably, a first protrusion and a second protrusion are formed on the upper surface of the fixed bar, a recessed portion is formed between the first protrusion and the second protrusion, a third adhesive layer is provided at the recessed portion of the fixed bar, and the printed circuit board is fixed to the bottom surface of the recessed portion through the third adhesive layer.

[0018] The beneficial effects of the present invention are as follows: When the present invention is installed on the automotive sunroof glass, by switching different light-emitting elements to emit light, fluorescent or reflective patterns can be displayed in a more variable manner, so as to create a richer and more comfortable atmosphere inside the vehicle. And during the installation process onto the sunroof, the light-emitting elements in the light-emitting module can be appropriately protected to avoid collision damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the state of the light-emitting device of the present invention after being installed on the automotive sunroof glass;

[0020] Figure 2 A partial perspective view of the light-emitting device of the present invention;

[0021] Figure 3 A planar cross-sectional exploded view of the component combination relationship of the light-emitting device of the present invention;

[0022] Figure 4 A planar cross-sectional view of the combined structure of the light-emitting device of the present invention;

[0023] Figure 5 A partial planar schematic diagram of the configuration relationship between the light-emitting elements and the limiting blocks of the light-emitting device of the present invention;

[0024] Figure 6 A side cross-sectional schematic diagram of the first light-emitting element of the light-emitting device of the present invention emitting ultraviolet light to cause a fluorescence reaction of the first pattern of the coating;

[0025] Figure 7A side cross-sectional schematic view of the second light-emitting element of the light-emitting device of the present invention emitting infrared light to cause a fluorescence reaction of the second pattern of the coating;

[0026] Figure 8 A side cross-sectional schematic view of the first light-emitting element and the second light-emitting element of the light-emitting device of the present invention emitting light simultaneously to cause a fluorescence reaction of the first pattern and the second pattern simultaneously;

[0027] Figure 9 A side cross-sectional schematic view of the third light-emitting element of the light-emitting device of the present invention emitting light to reflect and refract the third pattern;

[0028] Figure 10 A plan view of the first light-emitting element of the light-emitting device of the present invention emitting ultraviolet light to generate a light-emitting first pattern;

[0029] Figure 11 A plan view of the second light-emitting element of the light-emitting device of the present invention emitting infrared light to generate a light-emitting second pattern;

[0030] In the figure: 1: Light-emitting module, 10: Printed circuit board, 11A: First light-emitting element, 11B: Second light-emitting element, 12: Current driving element, A: Light-emitting element module, U: Light-emitting unit, 16: Limit block, 2: Light guide layer, 21: Concave hole, 3: Fixed pressing strip, 31: Depressed part, 32: First protruding part, 33: Second protruding part, 4A: First adhesive layer, 4B: Second adhesive layer, 4C: Third adhesive layer, 5: Skylight glass, 51: Glass frame, C: Coating, C1: First pattern, C2: Second pattern, L1: Ultraviolet light, L2: Infrared light, L3: Three primary color lights. Detailed implementation manners

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] As shown in the figure, a light-emitting device for an automobile skylight capable of changing a display pattern according to the present invention is a light-emitting device for being installed on an automobile skylight glass 5. It includes a light guide layer 2, a light-emitting module 1, and a fixed pressing strip 3. The light guide layer 2 is a plate-shaped body made of a transparent material having good light guiding properties and an appropriate thickness. Preferably, a soft light-guiding transparent material can be used for manufacturing, so that it can be cut, assembled, and attached thereto according to the size and curvature of the automobile skylight glass.

[0033] The two opposite planes of the light guide layer 2 are respectively a first surface and a second surface. Preferably, in the present invention, the first ink and the second ink can be used to form non-overlapping first pattern C1 and second pattern C2 on the first surface of the light guide layer 2 by means of imprinting or printing, and the first pattern C1 and the second pattern C2 together constitute a coating C on the first surface of the light guide layer 2 (as Figure 6 shown).

[0034] The first pattern C1 is formed of a first ink that produces a fluorescence reaction to ultraviolet light, and a first adhesive layer 4A is further provided around the first surface. A third pattern C3 is formed on the second surface of the light guide layer 2 relative to the first surface, and the third pattern C3 is constituted by a plurality of concave holes 21 that can reflect and refract light. The second pattern C2 is formed of a second ink that produces a fluorescence reaction to infrared light.

[0035] The basic components of the first ink and the second ink include: pigments, binders and additives; they are all inorganic compounds or organic compounds, and are made into printing inks with different characteristics by appropriately adjusting the proportion of the components. For example, by adding appropriate fluorescent or phosphorescent pigment powder to the ink, the printed pattern can have a fluorescence or phosphorescence reaction. The present invention uses colorless fluorescent pigments as one of the components of the first ink and the second ink respectively, and different additives are added to the first ink and the second ink, so that the first pattern C1 printed by the first ink produces a fluorescence reaction and emits light when receiving ultraviolet light, but does not produce a fluorescence reaction and is almost invisible to the naked eye when receiving other lights, that is, the first ink can be regarded as invisible ink; the second pattern C2 printed by the second ink produces a fluorescence reaction and emits light when receiving infrared light that belongs to invisible light, but does not produce a fluorescence reaction when receiving other lights, and is almost invisible to the naked eye, that is, the second ink is also invisible ink.

[0036] As Figure 9 shown, the first pattern C1 can be any pattern; the second pattern C2 can be any pattern different from the first pattern C1, or even a pattern complementary to the first pattern C1, but the first pattern C1 and the second pattern C2 do not overlap with each other.

[0037] The second surface of the light guide layer 2 is formed with a plurality of fine concave hole 21 structures on its surface by means of laser engraving, and the third pattern C3 is constituted by the plurality of concave holes 21. Through the structure of the plurality of fine concave holes 21, the light conducted in the light guide layer 2 will produce reflection and refraction when hitting the concave holes 21, so that the light is brighter at the concave holes 21 than at the non-concave holes, thereby showing the luminous third pattern C3.

[0038] As Figure 2 and Figure 5As shown, the light-emitting module 1 preferably includes a printed circuit board 10, a plurality of first light-emitting elements 11A, a plurality of second light-emitting elements 11B, a plurality of third light-emitting elements 11C, and a plurality of limiting blocks 16 disposed on the printed circuit board 10. The plurality of first light-emitting elements 11A preferably use ultraviolet light-emitting diodes (UV LEDs) to emit ultraviolet light; the second light-emitting elements 11B preferably use infrared light-emitting diodes (IR LEDs) to emit infrared light; the plurality of third light-emitting elements 11C preferably use primary color light-emitting diodes (RGB LEDs) to emit three primary colors of red, green, and blue light; the plurality of limiting blocks 16 are closer to one side edge of the printed circuit board 10 than the plurality of first light-emitting elements 11A, second light-emitting elements 11B, and third light-emitting elements 11C. The light incident side of the light guide layer 2 contacts the limiting blocks 16.

[0039] One first light-emitting element 11A, one second light-emitting element 11B, and one third light-emitting element 11C are sequentially arranged to form a light-emitting unit U. A plurality of the light-emitting units U are linearly arranged on the printed circuit board 10, and each of the limiting blocks 10 is disposed between adjacent light-emitting units.

[0040] More specifically, when a coating C including a first pattern C1 and a second pattern C2 is provided on the first surface of the light guide layer 2, and a third pattern C3 is provided on the second surface of the light guide layer 2, as Figure 5 shown, the light-emitting module 1 to be matched arranges one first light-emitting element 11A, one second light-emitting element 11B, and one third light-emitting element 11C in sequence to form a light-emitting unit U, and then linearly arranges a plurality of the light-emitting units U on the printed circuit board 10. The limiting blocks 16 can be unrestrictedly disposed between the first light-emitting element 11A and the second light-emitting element 11B, or between the second light-emitting element 11B and the third light-emitting element 11C, or between the first light-emitting element 11A and the third light-emitting element 11C; each of the limiting blocks 16 is disposed on a side closer to the printed circuit board 10 than the first light-emitting element 11A, second light-emitting element 11B, and third light-emitting element 11C. Therefore, a gap T exists between the limiting blocks 16 and the light-emitting surfaces of the first, second, and third light-emitting elements 11A, 11B, and 11C (as Figure 5 shown). In addition, a plurality of current driving elements 12 (such as resistors) are combined with one first light-emitting element 11A, or one second light-emitting element 11B, or one third light-emitting element 11C to form a light-emitting element module A. Each light-emitting element module A can be separately controlled to conduct current to cause the first light-emitting element 11A, second light-emitting element 11B, or third light-emitting element 11C to emit light.

[0041] The fixing strip 3 is a fixing member on which the light-emitting module 1 is provided and the entire light-emitting device is mounted and fixed to the automotive sunroof glass 5. As Figures 2 to 4 shown, the fixing strip 3 can be integrally formed into an annular frame shape. A first protrusion 32 and a second protrusion 33 are formed on the upper surface of the fixing strip 3, a recess 31 is formed between the first protrusion and the second protrusion, the upper surfaces of the first protrusion 32 and the second protrusion 33 are flush, and the bottom surface of the recess 31 is lower than the upper surfaces of the first protrusion 32 and the second protrusion 33. A third adhesive layer 4C is provided at the recess 31 of the fixing strip, and the printed circuit board 10 is fixed to the bottom surface of the recess 31 through the third adhesive layer 4C.

[0042] A second adhesive layer 4B is further provided on the fixing strip 3; the light guide layer 2 is fixed to the surface of the automotive sunroof 5 through the first adhesive layer 4A, and the fixing strip 3 is also fixed to the surface of the automotive sunroof 5 through the second adhesive layer 4B.

[0043] In the present invention, only the first pattern C1 or only the second pattern C2 can be provided on the coating C on the first surface of the light guide layer 2, instead of providing the first pattern and the second pattern simultaneously (not shown in the figure). Although not shown in the figure, reference can be made to Figure 5 and Figure 6 to understand that when only the first pattern C1 or only the second pattern C2 is provided on the coating C on the first surface of the light guide layer 2, the paired light-emitting module 1 is only provided with a plurality of first light-emitting elements 11A and third light-emitting elements 11C arranged in a straight line, or a plurality of second light-emitting elements 11B and third light-emitting elements 11C on the printed circuit board 10. Limit blocks are provided between the first light-emitting elements arranged in a straight line on the printed circuit board 10.

[0044] The method of installing the light-emitting device of the present invention on the automotive sunroof is described as follows:

[0045] As Figure 3 shown, first, the printed circuit board 10 is fixed to the recess 31 of the fixing strip 3 through the third adhesive layer 4C

[0046] bottom surface; the third adhesive layer 4C can be a double-sided tape. After one side of the third adhesive layer 4C is adhered to the bottom surface of the printed circuit board 10, the other side is adhered to the bottom surface of the recess 31 to fix the printed circuit board 10.

[0047] Then, one side of the first adhesive layer 4A is adhered to the first surface of the light guide layer 2 provided with the coating C, and the other side of the first adhesive layer 4A is adhered to the surface of the automotive sunroof glass 5, so that the light guide layer 2 is fixed to the sunroof glass 5.

[0048] Finally, after pasting one side of a second adhesive layer 4B on the upper surface of the second protruding portion 33 of the fixing strip 3, paste the other side of the second adhesive layer 4B on the surface of the automotive sunroof glass 5. At the same time, press the first protruding portion 32 of the fixing strip 3 against the lower surface of the light guide layer 2, so that the light guide layer 2 is further firmly fixed to the sunroof glass 5. During the above installation process, appropriately adjust the position of the fixing strip 3 so that the outer edge of the fixing strip 3 abuts against the inner edge of the glass frame 51 of the sunroof to meet the visual aesthetics. At the same time, during the installation process, abut the light incident surface on one side of the light guide layer 2 against the limiting block 16 and then paste the second adhesive layer 4B on the sunroof glass 5. Thus, since the light guide layer 2 does not touch the first light-emitting element 11A and the second light-emitting element 11B during the installation process, each light-emitting element can be protected from damage.

[0049] Since the light-emitting device of the present invention preferably has a coating C including a first pattern C1 and a second pattern C2 provided on the first surface of the light guide layer 2, a third pattern C3 provided on the second surface, and a first light-emitting element 11A, a second light-emitting element 11B, and a third light-emitting element 11C configured in the light-emitting module 1, and the first light-emitting element 11A, the second light-emitting element 11B, and the third light-emitting element can be selectively switched through an IC circuit and a switch, the usage method of the present invention is described as follows:

[0050] As Figure 6 and Figure 10 shown, when the circuit is switched so that only the first light-emitting element 11A emits ultraviolet light L1, only the first pattern C1 fluoresces in response to the ultraviolet light L1 and emits light, while the second pattern C2 does not fluoresce and does not emit light, so that the glowing first pattern C1 reflects from the second surface of the light guide layer 2, and the passengers in the vehicle can see the first pattern on the sunroof when looking up. At the same time, the ultraviolet light L1 emitted by the first light-emitting element 11A is also reflected and refracted in the concave holes 21 of the third pattern C3, so that the third pattern C3 also emits light and reflects from the second surface of the light guide layer 2.

[0051] As Figure 7 and Figure 11 shown, when the circuit is switched so that only the second light-emitting element 11B emits infrared light L2, only the second pattern C2 fluoresces in response to the infrared light L2 and reflects light, while the first pattern C1 does not fluoresce and does not emit light, so that the glowing second pattern C2 reflects from the second surface of the light guide layer 2, and the passengers in the vehicle can see the second pattern on the sunroof when looking up. Since the infrared light L2 is invisible light, the third pattern C1 does not emit light when only the second light-emitting element 11B emits infrared light L2.

[0052] As Figure 8As shown, when the circuit is switched and the first light-emitting element 11A emits ultraviolet light L1 and the second light-emitting element 11B emits infrared light L2 at the same time, the first pattern C1 fluoresces in response to the ultraviolet light L1 and emits light. At the same time, the second pattern C2 fluoresces in response to the infrared light L2 and emits light. Moreover, the ultraviolet light L1 is reflected and refracted by the concave holes 21 of the third pattern C3 and emits light. As a result, the first pattern C1, the second pattern C2, and the third pattern C3 are simultaneously presented on the second surface of the light guide layer 2. The first pattern C1, the second pattern C2, and the third pattern C3, which are properly designed and matched, can present a more three-dimensional visual effect through the distances between them.

[0053] As Figure 9 shown, when the circuit is switched and only the third light-emitting element 11C emits the primary color light L3, only the concave holes 21 of the third pattern C3 reflect and refract the primary color light L3 and emit light. The first pattern C1 and the second pattern C2 do not fluoresce and do not emit light. As a result, only the third pattern C3 is presented on the second surface of the light guide layer 2, and the passengers in the vehicle can view the third pattern on the sunroof when they look up. The third light-emitting element 11C can also be controlled to emit red, blue, or green light separately or simultaneously, so that the third pattern presents a more colorful visual effect.

[0054] The above are only preferred embodiments for explaining the present invention, and are not intended to limit the present invention in any form. Any modification or change to the present invention made under the same creative spirit should still be included in the scope of protection of the present invention.

Claims

1. A light-emitting device for a car sunroof capable of changing display patterns, characterized in that: The described light-emitting device includes a light guide layer, a light-emitting module, and a fixing bar. A coating with a first pattern is provided on the first surface of the light guide layer. The first pattern is formed by a first type of ink that fluoresces in response to ultraviolet light. A first adhesive layer is also provided around the first surface. A third pattern is formed on the second surface of the light guide layer opposite the first surface. The third pattern is composed of a plurality of concave holes that can reflect and refract light. The light-emitting module includes a printed circuit board, at least one first light-emitting element disposed on the printed circuit board, and at least one limiting block. The first light-emitting element is used to emit ultraviolet light. The limiting block is closer to one side of the printed circuit board than the first light-emitting element. The light-emitting module is disposed on the fixing bar such that the light incident side of the light guide layer contacts the limiting block and is adjacent to the plurality of first light-emitting elements. A second adhesive layer is also provided on the fixing bar. The light guide layer is fixed to the surface of the automobile sunroof through the first adhesive layer, and the fixing bar is also fixed to the surface of the automobile sunroof through the second adhesive layer.

2. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1, characterized in that: There are at least two of the first light-emitting elements, and the first light-emitting elements are ultraviolet LEDs.

3. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1, characterized in that: At least one third light-emitting element is provided on the printed circuit board.

4. The light-emitting device for a car sunroof capable of changing display patterns according to claim 3, characterized in that: There are at least two of the third light-emitting elements, and the third light-emitting elements are primary color LEDs.

5. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1, characterized in that: The coating further includes a second pattern formed by a second type of ink that fluoresces in response to infrared light and does not overlap with the first pattern. At least one second light-emitting element is provided on the printed circuit board. The second light-emitting element is used to emit infrared light, and the limiting block is closer to one side of the printed circuit board than the second light-emitting element.

6. The light-emitting device for a car sunroof capable of changing display patterns according to claim 5, characterized in that: There are at least two of the second light-emitting elements, and the second light-emitting elements are infrared LEDs.

7. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1, characterized in that: The third pattern is formed by laser engraving a plurality of concave holes on the second surface of the light guide layer.

8. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1, characterized in that: The first light-emitting elements are linearly arranged on the printed circuit board, and each limiting block is disposed between two adjacent first light-emitting elements.

9. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1 or 3 or 5, characterized in that: One first light-emitting element, one second light-emitting element, and one third light-emitting element are sequentially arranged to form a light-emitting unit. A plurality of the light-emitting units are linearly arranged on the printed circuit board, and each limiting block is disposed between adjacent light-emitting units.

10. The light-emitting device for a car sunroof capable of changing display patterns according to claim 1, characterized in that: A first protrusion and a second protrusion are formed on the upper surface of the fixing bar. A recessed portion is formed between the first protrusion and the second protrusion. A third adhesive layer is provided at the recessed portion of the fixing bar. The printed circuit board is fixed to the bottom surface of the recessed portion through the third adhesive layer.

Images