TWI761271B - Reflective structure - Google Patents

Abstract

A reflection structure includes a substrate, a light-emitting element, two first reflectors and two second reflectors. The light-emitting element is arranged on the substrate, and the virtual reference axis is parallel to the substrate and passes through the center of the light-emitting element. The two first reflectors are respectively arranged on opposite sides of the light-emitting element and perpendicular to the reference axis. The two second reflectors are respectively arranged on the other two opposite sides of the light-emitting element and the axis of the second reflector extending along the longitudinal direction is clamped 15 to 75 degrees with the reference axis.

Description

reflective structure

A reflective structure, especially a reflective structure of a light-emitting panel.

With the application of different occasions and states, the light-emitting panel will require a specific light field distribution. For example, the light-emitting panel for vehicles, according to the specific angle of the driver's seat and the passenger seat, the light field of the light-emitting panel must be concentrated on the left and right of the light-emitting panel. In order to increase the visibility of users in the driver's seat and the passenger's seat, the light-emitting panels for vehicles often cause the problem of light field loss on the side facing the front windshield of the vehicle and the opposite lower side.

In view of this, a reflection structure is provided, which includes a substrate, a light-emitting element, two first reflectors and two second reflectors. The light-emitting element is arranged on the substrate, and the virtual reference axis is parallel to the substrate and passes through the center of the light-emitting element. The two first reflectors are respectively disposed on opposite sides of the light-emitting element and perpendicular to the reference axis. The two second reflectors are respectively disposed on the other two opposite sides of the light-emitting element, and the axis extending along the longitudinal direction of the two second reflectors and the reference axis are sandwiched by 15 to 75 degrees.

According to some embodiments, the included angle between the axes extending along the longitudinal direction of the two second reflectors and the reference axis is 45 degrees.

According to some embodiments, the two first reflectors respectively have first reflecting surfaces, the angle between the first reflecting surfaces and the substrate is 10 to 80 degrees, and the two second reflectors respectively have second reflecting surfaces, the second reflecting surfaces and The angle between the substrates is 10 to 80 degrees.

According to some embodiments, the two first reflectors respectively have a first height, and the first height is 5 to 20 um, and the two second reflectors respectively have a second height, and the second height is 5 to 20 um.

According to some embodiments, the first height is 20um and the second height is 20um.

According to some embodiments, the first height and the second height are different heights.

According to some embodiments, the included angles of the axes of the two second reflectors extending along the longitudinal direction relative to the reference axis have an included angle difference between each other, and the included angle difference is between plus or minus 30 degrees.

According to some embodiments, the two second reflectors are parallel to each other.

According to some embodiments, the two first reflectors and the two second reflectors are not connected to each other.

According to some embodiments, another light-emitting element, another first reflector, and another two second reflectors are included, and the other light-emitting element is disposed along a reference axis on one of the two first reflectors and is opposite to the other one of the light-emitting elements. On one side, another first reflector is arranged along the reference axis, located on the side of the other light-emitting element without the first reflector, and is parallel to each other with the two first reflectors, and the other two second reflectors are respectively set. On the other two sides of the other light-emitting element relative to the first reflector and the other first reflector, and the included angle between the axes extending along the longitudinal direction of the other two second reflectors and the reference axis, and the two second reflectors The angle between the axis extending along the longitudinal direction of the reflector and the reference axis is the same.

To sum up, a reflection structure is provided. The light from the light-emitting element is reflected by the two first reflectors and emitted to the user side, so as to avoid the dispersion of the light emitted to the side of the two first reflectors. The two reflectors respectively reflect the light toward the side of the two second reflectors and emit the light to the user side, so as to avoid light loss caused by the light emitted from the two second reflectors.

Please refer to Figure 1 and Figure 2. FIG. 1 is a three-dimensional schematic diagram of a reflection structure according to a first embodiment. FIG. 2 is a top view of a reflective structure according to a first embodiment. The reflection structure 100 includes a substrate 10 , a light-emitting element 30 , two first reflectors 50A, 50B and two second reflectors 70A, 70B. The reflective structure 100 can be applied to a light-emitting panel, such as a light-emitting panel of a car screen.

The light-emitting element 30 is disposed on the substrate 10 , and the virtual reference axis A is parallel to the substrate 10 and passes through the center of the light-emitting element 30 . In the first embodiment, the light-emitting element 30 is, for example, an LED or a micro-LED. As shown in FIG. 2 , in the first embodiment, the light generated by the light emitting element 30 is emitted toward the upper and lower sides and the left and right sides of the light emitting element 30 respectively.

The two first reflectors 50A and 50B are respectively disposed on opposite sides of the light-emitting element 30 and are perpendicular to the reference axis A. As shown in FIG. The two second reflectors 70A and 70B are respectively disposed on the other two opposite sides of the light-emitting element 30 and clamped at 15 to 75 degrees with respect to the reference axis. In the first embodiment, the two first reflectors 50A, 50B perpendicular to the reference axis A can concentrate the light emitted from the light-emitting element 30 toward the left and right sides and improve the visibility. In the first embodiment, the two first reflectors 50A and 50B respectively reflect and concentrate the light emitted from the light-emitting element 30 toward the left and right sides and emit light toward the user side (the upper part shown in FIG. direction), the second reflector 70A reflects the light from the light-emitting element 30 toward the upper side and guides it to the left side of the light-emitting element 30 to emit light toward the side of the user, and the second reflector 70B reflects the light from the light-emitting element 30 toward the lower side. And guide the light-emitting element 30 to the right side to emit light toward the user side located on the side.

Specifically, the reflective structure 100 of the first embodiment is a light-emitting panel applied to a car screen. Generally speaking, the car screen is arranged between the driver's seat and the passenger's seat, but the light-emitting panel faces upwards (for example, toward the shield). The light on the windshield side) is easy to reflect on the windshield and affect the visibility, and the light facing the lower side is easy to cause the loss of light. In order to effectively utilize the light generated by the light-emitting panel and avoid the loss of light, the reflective structure 100 uses The two first reflectors 50A and 50B reflect the light emitted by the light-emitting element 30 toward the two first reflectors 50A and 50B and emit light toward the side of the user (ie, the driver's seat and the passenger seat), respectively, so as to avoid being emitted toward the second and second reflectors 50A and 50B. The light on the side of a reflector 50A, 50B is dispersed, and the light directed to the side of the two second reflectors 70A, 70B is also reflected by the two second reflectors 70A, 70B respectively, and the light is emitted toward the user side located on the side, In order to avoid the loss of light caused by light emitted from the two second reflectors 70A and 70B.

In the first embodiment, the included angle α between the axes extending along the longitudinal direction of the two second reflectors 70A, 70B and the reference axis A is 15 to 75 degrees, and the preferred included angle α is 45 degrees. As shown in FIG. 2 , specifically, the axes extending in the longitudinal direction of the two second reflectors 70A and 70B intersect the reference axis A and form an included angle α. As shown in FIG. 2 , the light emitted from the light emitting element 30 toward the two second reflectors 70A and 70B is guided to the left and right sides of the light emitting element 30 by the two second reflectors 70A and 70B.

Please refer to Figure 3 and Figure 4. FIG. 3 is a schematic diagram of the first reflector according to the direction indicated by the reference numeral 3 in FIG. 1 . FIG. 4 is a schematic diagram of the second reflector according to the direction indicated by the reference numeral 4 in FIG. 1 . As shown in FIG. 3 , in the first embodiment, the two first reflectors 50A and 50B respectively have first reflecting surfaces 51A and 51B, and the included angle β between the first reflecting surfaces 51A and 51B and the substrate 10 is 10 to 80 Spend. In the first embodiment, the side view surfaces of the two first reflectors 50A and 50B are, for example, but not limited to a trapezoid shape. change to a triangle. Specifically, the light emitted from the light-emitting element 30 to the left and right is reflected and concentrated by the first reflecting surfaces 51A and 51B respectively, so as to improve the light-extraction efficiency of the light-emitting panel. The included angle β is preferably 30 degrees.

As shown in FIG. 4 , the two second reflectors 70A and 70B respectively have second reflection surfaces 71A and 71B, and the included angle γ between the second reflection surfaces 71A and 71B and the substrate 10 is 10 to 80 degrees. In the first embodiment, the side view surfaces of the two second reflectors 70A, 70B are, for example, trapezoidal shapes, but not limited to this. change to a triangle. Specifically, the light emitted from the upper and lower sides of the light-emitting element 30 is respectively reflected by the second reflecting surfaces 71A and 71B and concentrated to the left and right sides of the light-emitting element 30 to emit light. For the light extraction efficiency of the left and right sides, the included angle γ between the second reflecting surfaces 71A, 71B and the substrate 10 is preferably 80 degrees.

Referring to FIG. 3 and FIG. 4 again, in the first embodiment, the two first reflectors 50A and 50B respectively have a first height H1 , and the first height H1 is 5 to 20 um. That is to say, the heights of the two first reflectors 50A and 50B can be adjusted to adjust the light extraction efficiency of the two first reflectors 50A and 50B, and the preferred height of the first height H1 is 20um. The two second reflectors 70A, 70B respectively have a second height H2, and the second height H2 is 5 to 20 um. That is to say, the heights of the two second reflectors 70A and 70B can also be adjusted to adjust the light extraction efficiency of the two second reflectors 70A and 70B, and the preferred height of the second height H2 is 20um. In the first embodiment, the higher the heights of the two first reflectors 50A, 50B and the two second reflectors 70A, 70B, the higher the light extraction efficiency. In other embodiments, the first height H1 and the second height H2 may also be different heights.

As shown in FIG. 2 , in the first embodiment, the two first reflectors 50A, 50B and the two second reflectors 70A, 70B are not connected to each other. Specifically, the two first reflectors 50A, 50B and the two second reflectors 70A, 70B are fabricated in different processes, so the two first reflectors 50A, 50B and the two second reflectors 70A, 70B There will be a certain interval between them.

See Figure 2 again. In the first embodiment, another light-emitting element 30', another first reflector 50' and another two second reflectors 70A' and 70B' are included. Another light-emitting element 30 ′ is disposed along the reference axis A on one of the two first reflectors 50A and 50B and is opposite to the other side of the light-emitting element 30 . Another first reflector 50' is arranged along the reference axis A, is located on the side of the other light-emitting element 30' without the reflector, and is parallel to the two first reflectors 50A, 50B, and the other two second reflectors The reflectors 70A', 70B' are respectively disposed on the other two sides of the other light-emitting element 30' relative to the first reflector and the other first reflector 50', and the other two second reflectors 70A', 70B' are along the length of the The angle δ between the axis extending in the side direction and the reference axis A is the same as the angle α between the axis extending along the longitudinal direction and the reference axis A of the two second reflectors 70A and 70B. As shown in FIG. 2 , in the first embodiment, another light-emitting element 30 ′ is disposed on the other side of the first reflector 50B relative to the light-emitting element 30 along the reference axis A, that is, it is located on the first reflector as shown in the drawing. the right side of the device 50B. Another first reflector 50 ′ is arranged along the reference axis A and is located on the right side of the other light-emitting element 30 ′. Specifically, the reflective structures 100 can be extended to form multiple groups of reflective structures 100 according to the arrangement rule.

Referring to FIG. 2 again, in the first embodiment, the plurality of groups of reflective structures may also extend in a direction perpendicular to the reference axis A. As shown in FIG. The reflection structure 100 further includes a reference axis B, and the reference axis B is perpendicular to the reference axis A. As shown in FIG. Specifically, the two first reflectors 50A and 50B extend along the direction of the reference axis B, and the light emitting element 30 ″ is disposed on the other side of the second reflector 70B relative to the light emitting element 30 along the reference axis B, such as the drawing surface The lower side of the second reflector 70B is shown. On the side of the light-emitting element 30'' without the reflector, that is, the lower side of the light-emitting element 30'', a second reflector 70'' can be provided. That is to say, the reflective structures 100 can be extended in multiple groups along the reference axis A, and can also be extended in multiple groups along the reference axis B to form multiple rows and multiple columns of the reflective structures 100, so as to improve the light extraction efficiency of the light-emitting panel according to the usage conditions .

As shown in FIG. 2 , in the first embodiment, the two second reflectors 70A and 70B are parallel to each other but not limited thereto. See Figure 5. FIG. 5 is a top view of a reflection structure according to a second embodiment. In the second embodiment, the included angles α1 and α2 of the axes extending along the long sides of the two second reflectors 70A and 70B relative to the reference axis A have an included angle difference between plus or minus 30 degrees. Specifically, the axis of the second reflector 70A located on the upper side of the light-emitting element 30 extends along the longitudinal direction at an angle α1 relative to the reference axis A, and the second reflector 70B located on the lower side of the light-emitting element 30 extends along the longitudinal direction. The angle α2 of the axis relative to the reference axis A is different, and the angle difference between the angle α1 and the angle α2 is plus or minus 30 degrees, for example, the angle α1 is 30 degrees, the angle α2 is 45 degrees, and the angle difference between the angle α1 and the angle α2 That is 15 degrees. That is, the angles of the two second reflectors 70A and 70B can be adjusted respectively according to the structure or usage of the light-emitting panel.

As shown in FIG. 5 , in the second embodiment, under the multi-group reflection structure, when the second reflector 70A located on the upper side of the light-emitting element 30 extends along the longitudinal direction, the included angle α1 relative to the reference axis A and the When the axis of the second reflector 70B on the lower side of the light-emitting element 30 extending along the longitudinal direction has a different angle α2 with respect to the reference axis A, the other second reflector 70A' located on the upper side of the other light-emitting element 30 ′ extends along the longitudinal direction. The included angle δ1 between the axis extending in the side direction and the reference axis A is the same as the included angle α1, and the other second reflector 70B' located on the lower side of the other light-emitting element 30 ′ extends along the axis along the longitudinal direction and the reference axis A The included angle δ2 between them is the same as the included angle α2.

In summary, a reflective structure 100 is provided. The two first reflectors 50A and 50B are used to reflect the light emitted by the light-emitting element 30 toward the two first reflectors 50A and 50B and emit light toward the user side respectively, so as to avoid the light emitted from the light-emitting element 30 . The light toward the two first reflectors 50A, 50B is dispersed, and the two second reflectors 70A, 70B also reflect the light toward the two second reflectors 70A, 70B and emit light toward the user side respectively, so as to To avoid light loss caused by the light emitted from the two second reflectors 70A and 70B, the user can also adjust the setting angles of the two second reflectors 70A and 70B to adjust the light extraction efficiency.

100: Reflective Structure 10: Substrate 30, 30": light-emitting element 30': Another light-emitting element 50': Another first reflector 50A, 50B: first reflector 51A, 51B: the first reflecting surface 70", 70A, 70B: Second reflector 70A', 70B': the other two second reflectors 71A, 71B: Second reflective surface A, B: Reference axis H1: first height H2: second height α, α1, α2, β, γ, δ, δ1, δ2: included angle

FIG. 1 is a three-dimensional schematic diagram of a reflection structure according to a first embodiment. FIG. 2 is a top view of a reflective structure according to a first embodiment. FIG. 3 is a schematic diagram of the first reflector according to the direction indicated by the reference numeral 3 in FIG. 1 . FIG. 4 is a schematic diagram of the second reflector according to the direction indicated by the reference numeral 4 in FIG. 1 . FIG. 5 is a top view of a reflection structure according to a second embodiment.

100: Reflective Structure

10: Substrate

30: Light-emitting element

50A, 50B: first reflector

70A, 70B: Second reflector

Claims (10)

A reflective structure comprising: a substrate; a light-emitting element, the light-emitting element is disposed on the substrate, and a virtual reference axis is parallel to the substrate and passes through the center of the light-emitting element; two first reflectors, respectively disposed on opposite sides of the light-emitting element and perpendicular to the reference axis; and Two second reflectors are respectively disposed on the other two opposite sides of the light-emitting element, and the axis extending along the longitudinal direction of the two second reflectors and the reference axis are sandwiched by 15 to 75 degrees. The reflection structure according to claim 1, wherein the included angle between the axes extending along the longitudinal direction of the two second reflectors and the reference axis is 45 degrees. According to the reflection structure of claim 1, the two first reflectors respectively have a first reflection surface, the included angle between the first reflection surface and the substrate is 10 to 80 degrees, and the two second reflectors respectively have a second reflective surface, and the included angle between the second reflective surface and the substrate is 10 to 80 degrees. The reflective structure of claim 1, wherein the two first reflectors have a first height respectively, the first height is 5 to 20um, the two second reflectors have a second height respectively, the second Height is 5 to 20um. According to the reflection structure of claim 4, the first height is 20um, and the second height is 20um. According to the reflective structure of claim 4, the first height and the second height are different heights. The reflective structure as claimed in claim 1, wherein an included angle between the axes of the two second reflectors extending along the longitudinal direction relative to the reference axis has an included angle difference between each other, and the included angle difference is between plus or minus 30 degrees between. The reflection structure of claim 1, wherein the two second reflectors are parallel to each other. The reflection structure of claim 1, wherein the two first reflectors and the two second reflectors are not connected to each other. The reflection structure according to claim 1, further comprising another light-emitting element, another first reflector and another two second reflectors, the other light-emitting element is disposed among the two first reflectors along the reference axis One and opposite to the other side of the light-emitting element, the other first reflector is arranged along the reference axis, located on the side of the other light-emitting element where the first reflector is not provided, and is connected with the two first reflectors. The reflectors are parallel to each other, the other two second reflectors are respectively arranged on the other two sides of the other light-emitting element relative to the first reflector and the other first reflector, and the other two second reflectors The included angle between the axis extending along the longitudinal direction and the reference axis is the same as the included angle between the axes extending along the longitudinal direction of the two second reflectors and the reference axis.

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