Patent ID: 12237438

DETAILED DESCRIPTION

Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.

Embodiment 1

Referring toFIGS.1to12, a light-emitting device in accordance with a first embodiment of the disclosure is illustrated. The light-emitting device includes a substrate100, a first mesa structure111, a second mesa structure112, at least one current blocking element130, at least one conductive bridging element150, a first conductive pad171, and a second conductive pad172.

The substrate100may be made of sapphire (Al2O3), but is not Limited thereto.

The first and second mesa structure111,112are separately disposed on the substrate100with a groove120formed therebetween. As shown inFIG.3, the substrate100is formed with a first trench121and a second trench122surrounding the first mesa structure111and the second mesa structure112, respectively. The first and second trenches121,122may be formed by a deep trench isolation process. A portion of the first trench121and a portion of the second trench122that are located between the first mesa structure111and the second mesa structure112define the groove120having a bottom, as shown inFIG.2. In this embodiment, the first and second mesa structure111,112are arranged along an X-direction, as shown inFIG.1.

Each of the first and second mesa structures111,112includes a first type semiconductor layer111A,112A disposed on the substrate100, an active layer1110,112C disposed on the first type semiconductor layer111A,112A, and a second type semiconductor layer111B,112B disposed on the active layer1110,112C. A portion1111of the first type semiconductor layer111A of the first mesa structure111is exposed from the second type semiconductor layer111E and the active layer1110of the first mesa structure111, and a portion1121of the first type semiconductor layer.112A of the second mesa structure112is exposed from the second type semiconductor layer112B and the active layer112C of the second mesa structure112. The first mesa structure111has a side surface1112that is defined by the first type semiconductor layer111A, the active layer111C and the second type semiconductor layer111B of the first mesa structure111. The second mesa structure112has a side surface1122that is defined by the first type semiconductor layer112A, the active layer112C and the second type semiconductor layer.1128of the second mesa structure112.

The first type semiconductor layers111A,112A have a conductivity type opposite to that of the second type semiconductor layers111B,112B. In some embodiments, each of the first type semiconductor layers111A,112A may be formed as a multi-layered structure that includes a buffer layer disposed on the substrate100and an n-type semiconductor layer disposed on the buffer layer. Each of the active layers111C,112C may be formed as a multi-quantum-well structure. Each of the second type semiconductor layers111B,1128may be formed as a multi-layered structure that includes a p-type semiconductor layer.

In this embodiment, the first type semiconductor layer112A of the second mesa structure112has two of the exposed portions1121exposed from the active layer.112C and the second types semiconductor layer112B, as shown inFIG.4. In other embodiments, the number of the exposed portion1121of the first type semiconductor layer112A of the second mesa structure112may be one.

The at least one current blocking element130is disposed on the second type semiconductor layer111B of the first mesa structure111to expose a portion of the second type semiconductor layer111E of the first mesa structure111, and extends to the side surface1112of the first mesa structure111, the bottom of the groove120and a portion1123of the side surface1122of the second mesa structure112defined by the first type semiconductor layer112A in a continuous manner.

The at least one current blocking element130has a number corresponding to a number of the exposed portion(s)1121of the first type semiconductor layer112A of the second mesa structure112. In this embodiment, the number of the current blocking element130of the light-emitting device is two. For purposes of simplicity and clarity, only one of the current blocking elements130is taken as an example for description hereinafter.

The current blocking element130may be made of a transparent insulating material, such as silicon dioxide, but is not limited thereto.

In this embodiment, the current blocking element130includes a head portion1301that is disposed on the second type semiconductor layer111B of the first mesa structure111, and a tail portion1302that extends from the head portion1301to the side surface1112of the first mesa structure111, the bottom of the groove120and the portion1123of the side surface1122of the second mesa structure112defined by the first type semiconductor layer112A in a continuous manner, as shown inFIGS.5and6. To be specific, the tail portion1302of the current blocking element130is disposed on the side surface1112of the first mesa structure111to expose a portion of the side surface1112of the first mesa structure111, and is disposed on the side surface1122of the second mesa structure112to expose a portion of the side surface1122of the second mesa structure112.

The tail portion1302has a width W32that is larger than a width W31of the head portion1301, so as to ensure completeness of the tail portion1302. In this embodiment, the width W32and the width W31are widths defined in a Y-direction that is perpendicular to the X-direction, as shown inFIG.5.

The at least one conductive bridging element150is disposed on the at least one current blocking element130. The at least one conductive bridging element150has a number corresponding to a number of the current blocking element130. In this embodiment, the number of the conductive bridging element150is two, which equals to the number of the current blocking elements130, as shown inFIG.9. Hence, chip failure is avoidable even if one of the conductive bridging elements150is damaged.

In this embodiment, each of the conductive bridging elements150is disposed on a corresponding one of the current blocking elements130. The conductive bridging elements150are respectively located in corresponding position proximate to two opposite boundaries of the light-emitting device as viewed from top thereof to electrically connect the first and second mesa structures111,112in series, as shown inFIG.7. Such positional configuration of the conductive bridging elements150may reduce chip failure caused by damage of the conductive bridging elements150due to improper operation of push-up needles during picking up of the light-emitting device, thereby increasing reliability of final products.

For purposes of simplicity and clarity, only one of the conductive bridging elements150is taken as an example for description hereinafter.

The conductive bridging element150may be made of a conductive material including a metallic material, a conducting metal oxide, etc. The metallic material, for example, may be selected from the group consisting of copper, silver, gold and alloys thereof, but is nut limited thereto.

The conductive bridging element150includes a body portion1503, a first portion1501that extends from the body portion1503and that is electrically connected to the second type semiconductor layer111E of the first mesa structure111, and a second portion1502that extends from the body portion1503and that is electrically connected to the first type semiconductor layer112A of the second mesa structure112, as shown inFIG.8. In this embodiment, the first portion1501and the second portion1502of the conductive bridging element150extends from the body portion1503in opposite directions. In this embodiment, the first portion1501of the conductive bridging element150is electrically connected to the second type semiconductor layer1118of the first mesa structure111.

As shown inFIG.7, the first portion1501has a finger-like shape and has a width W51that is less than a width W53of the body portion1503, and the second portion1502has a width W52that is larger than a width W53of the body portion1503. That is, the second portion1502is relatively blunt with respect to the body portion1503and the first portion1501. In this embodiment, the width W51, the width W52, and the width W53are widths defined in the Y-direction.

Each of the first, second and body portions1501,1502,1503of the conductive bridging element150defines a bisecting line that geometrically divides each of the first, second and body portions1501,1502,1503into two symmetrical halves in the top view of the light-emitting device. The bisecting lines of the first, second and body portions1501,1502,1503coincide with each other in a straight line. Thus, the conductive bridging element150has an axisymmetric projection relative to the straight line in the top view of the light-emitting device. In this embodiment, the conductive bridging element150has a nail-like shape with mirror-symmetry.

Owing to the width configuration of the conductive bridging element150, the body portion1503is able to continuously extend across the groove120, and the second portion1502has a large contact area on the first type semiconductor layer112A of the second mesa structure112, which leads to a lower resistance and is beneficial for improving reliability of final products.

It is noted that a respective one of the exposed portions1121of the first type semiconductor layer112A of the second mesa structure112has a shape corresponding to that of the second portion1502of the conductive bridging element150, as shown inFIGS.1,4, and7. Further, the respective one of the exposed portions1121of the first type semiconductor layer112A of the second mesa structure112is adjacent to the first mesa structure111, and is located in position corresponding to the conductive bridging element150, so that the second portion1502of the conductive bridging element150is able to be electrically connected to the first type semiconductor layer112A of the second mesa structure112.

FIG.9is a top view illustrating positional and dimensional relationship of the current blocking element130and the conductive bridging element150. In this embodiment, the body portion1503of the conductive bridging element150is disposed on the tail portion1302of the current blocking element130so as to extend across the groove120, and has a projection image located within that of the tail portion1302in the top view of the light-emitting device. The first portion1501of the conductive bridging element150is disposed on the head portion1301of the current blocking element130, and has a projection image located within that of the head portion1301in the top view of the light-emitting device. The second portion1502of the conductive bridging element150has a projection image extending outside that of the current blocking element130in the top view of the light-emitting device so as to be disposed on the respective one of the exposed portions1121of the first type semiconductor layer112A of the second mesa structure112.

In actual practice, the tail portion1302of the current blocking element130may have an uneven thickness. In particular, the tail portion1302in corresponding position on the side surface1112of the first mesa structure111may have a relatively less thickness due to over-etching during patterning of the current blocking element130.

Hence, as shown inFIG.9, the width W53of the body portion1503and the width W32of the tail portion1302have a first width difference D1therebetween, and the width W51of the first portion1501and the width W31of the head portion1301have a second width difference D2therebetween. The first width difference D1is larger than the second width difference D2. That is, the width W32of the tail portion1302is configured to be large enough to ensure the body portion1503of the conductive bridging element150is continuously disposed thereon, such that current leakage may be avoidable and reliability of final products is further improved.

In some embodiments, the first width difference D1ranges from 6 μm to 200 μm. For example, the first width difference D1may be 10 μm, 20 μm, 40 μm, 60 μm, or 100 μm. Each of the width difference D1aims to ensure that current leakage is avoided and that conductivity of the conductive bridging element150is maintained.

In some embodiments, the second width difference D2ranges from 0 μm to 60 μm. For example, the second width difference D2may be 1 μm, 2 μm, 10 μm, or 20 μm.

The first conductive pad171is located in corresponding position above the first mesa structure111, and is electrically connected to the first type semiconductor layer111A of the first mesa structure111. The second conductive pad172is located in corresponding position above the second mesa structure112, and is electrically connected to the second type semiconductor layer112B of the second mesa structure112. The first and second conductive pads171,172may be made of a metal or an alloy.

It is noted that the at least one conductive bridging element150has a projection image that is spaced apart from those of the first and second conductive pads171,172in the top view of the light-emitting device.

In this embodiment, the projection image of the first conductive pad171has an intervening part located between the projection images of two of the conductive bridging elements150, as shown inFIG.1. The intervening part of the first conductive pad171extends toward the second conductive pad172, as shown inFIG.12.

In this embodiment, the light-emitting device further includes a first conductive block151disposed on the exposed portion1111of the first type semiconductor layer111A of the first mesa structure111, as shown inFIG.8. The first conductive block151has a projection image located within that of the exposed portion1111in the top view of the light-emitting device, as shown inFIG.1. The exposed portion1111of the first type semiconductor layer111A of the first mesa structure111has a shape corresponding to that of the first conductive block151. In this embodiment, the first conductive block151is in a form of circle in the top view of the light-emitting device, as shown inFIG.7.

Furthermore, the first conductive block151is equidistant from the conductive bridging elements150, as shown inFIG.1.

In terms of process, the first conductive block151and the at least one conductive bridging element150are made from the same conductive layer.

In this embodiment, the light-emitting device further includes a current blocking structure132that is disposed on the second type semiconductor layer112B of the second mesa structure112to expose a portion of the second type semiconductor layer112B of the second mesa structure112, as shown inFIG.6. In actual practice, the current blocking structure132and the current blocking element130may be made from the same transparent insulating layer.

In this embodiment, the current blocking structure132includes a central portion1321and two extending portions1322that independently extend from the central portion1321, as shown inFIG.5. The central portion1321has a width larger than each width of the extending portions1322. In this embodiment, the widths of central portion1321and the two extending portions1322are defined in the X-direction.

In this embodiment, each of the extending portions1322extends in a direction perpendicular to that of the tail portion1302of the current blocking structure132. In other embodiments, each of the extending portions1322may extend in a direction parallel to that of the tail portion1302of the current blocking structure132.

In this embodiment, the light-emitting device further includes a second conductive block152that is disposed on the current blocking structure132. The second conductive block152has a projection image located within that of the current blocking structure132in the top view of the light-emitting device, and may be formed with a shape similar to that of the current blocking structure132. In this embodiment, the second conductive block152includes a central part1521and two extending parts1522that independently extends from the central part1521, as shown inFIG.7. Each of the extending parts1522extends in a direction perpendicular to that of the tail portion1302of the current blocking structure132. In other embodiments, each of the extending parts1522may extend in a direction parallel to that of the tail portion1302of the current blocking structure132.

As shown inFIG.9, the central part1521has a width larger than each width of the extending parts1522, and has a projection image located within that of the central portion1321of the current blocking structure132in the top view of the light-emitting device. Each of the extending parts1522has a projection image located within that of a corresponding one of the extending portions1322of the current blocking structure132in the top view of the light-emitting device. In this embodiment, the widths of the central part1521and the two extending parts1522are defined in the X-direction.

Furthermore, the second conductive block152is equidistant from the conductive bridging elements150, as shown inFIG.7. In other words, the second conductive block152has a bisecting line coinciding with bisecting lines of the first and second conductive pads171,172, as shown inFIG.1.

In actual practice, the first and second conductive blocks151,152and the conductive bridging element150may be made from the same conductive layer.

In this embodiment, the light-emitting device further includes a first current spreading layer141that is disposed on the exposed portion of the second type semiconductor layer1118of the first mesa structure111and that is partially disposed between the current blocking element130and the conductive bridging element150. Thus, the conductive bridging element150is electrically connected to the second type semiconductor layer1118of the first mesa structure111by the first current spreading layer141, as shown inFIG.8.

In this embodiment, the first current spreading layer141has a shape similar to that of the second type semiconductor layer111B of the first mesa structure111, as shown inFIG.10. Furthermore, the first current spreading layer141has a projection image located within that of the second type semiconductor layer111B of the first mesa structure111in the top view of the light-emitting device. Hence, it can be seen that the projection image of the first current spreading layer141has a missing corner1411with a shape corresponding to the exposed portion1111of the first type semiconductor layer.111A of the first mesa structure111.

In this embodiment, the light-emitting device further includes a second current spreading layer142that is disposed on the exposed portion of the second type semiconductor layer112B of the second mesa structure112and that is disposed between the current blocking structure132and the second conductive block152. Thus, the second conductive block152is electrically connected to the second type semiconductor layer.112B of the second mesa structure112by the second current spreading layer142.

Owing to the projection image of the second conductive block152being located within that of the current blocking structure132, current injected from the second conductive block152is prone to spread along the second current spreading layer142first because the current is blocked from direct flowing downwardly from the second conductive block152to the second mesa structure112by the current blocking structure132.

In this embodiment, the second current spreading layer142has a shape similar to that of the second type semiconductor layer112B of the second mesa structure112, as shown inFIG.10. Furthermore, the second current spreading layer142has a projection image located within that of the second type semiconductor layer112B of the second mesa structure112in the top view of the light-emitting device. Hence, it can be seen that the projection image of the second current spreading layer.141has two missing corners1421, each of which has a shape corresponding to a corresponding one of the exposed portions1121of the first type semiconductor layer112A of the second mesa structure112.

In this embodiment, the light-emitting device further includes a first distributed Bragg reflective layer160that covers the first and second current spreading layers141,142, the conductive bridging element150, the first and second conductive blocks151,152, and the exposed portions of the side surfaces1112,1122of the first and second mesa structure111,112, and that is formed with a first via1601to expose the first conductive block151, and a second via1602to expose the second conductive block152at position corresponding to the central portion1321of the current blocking structure132. As shown inFIG.2, the first conductive pad171extends through the first via1601to be electrically connected to the first, conductive block151, and the second conductive pad172extends through the second via1602to be electrically connected to the second conductive block152.

In this embodiment, the first distributed Bragg reflective layer160simultaneously serves as a passivation layer, so as to not only simplify the structure of the light-emitting device but also improve reliability of final products. Furthermore, owing to the projection image of the conductive bridging elements150, and the first and second conductive pads171,172being spaced apart from each other, current leakage caused by damage of the first distributed Bragg reflective layer160can be avoided, thereby increasing reliability of final products.

In this embodiment, the first via1601is equidistant from the first portions1501of the conductive bridging elements150, as shown inFIG.1.

In this embodiment, the second via1602is located at position corresponding to the central part1521of the second conductive block152rather than any one of the extending parts1522, as shown inFIG.11, thereby ensuring that the second conductive pad172is electrically connected to the central part1521of the second conductive block152. Therefore, current injected from the second conductive pad172may be spread outwardly by two of the extending parts1522, thereby further facilitating current spreading from the central part1521so as to achieve a higher reliability.

In this embodiment, the light-emitting device further includes a second distributed Bragg reflective layer180that is disposed on a backside of the substrate100opposite to the first and second mesa structures111,112.

Embodiment 2

Referring toFIGS.13to18, a second embodiment of the light-emitting device is similar to the first embodiment of the light-emitting device, except that each of the conductive bridging elements150further includes a third portion1504that extends from the second portion1502and that is disposed on the exposed portion1121of the first type semiconductor layer112A of the second mesa structure112. Hence, the shape of the exposed portions1121of the first type semiconductor layer112A of the second mesa structure112and the shape of the second conductive pad172are adjusted accordingly. Besides, each of the extending portions1322of the current blocking structure132extends in a direction perpendicular to that of the first embodiment. Hence, the second conductive block152disposed on the current blocking structure132has a shape adjusted along with that of the current blocking structure132.

For purposes of simplicity and clarity, only one of the conductive bridging elements150and one of the current blocking elements130are taken as an example for description hereinafter.

In this embodiment, similar with the second portion1502of the conductive bridging element150, the third portion1504of the conductive bridging element150has a projection image extending outside that of the current blocking element130in the top view of the light-emitting device, as shown inFIG.17. Yet, the third portion1504has a finger-like shape, and has a width W54that is less than a width W53of the body portion1503, as shown inFIG.16. In some embodiments, the width W54of the third portion1504may be equal to that of the first portion W51. Such width configuration of the third portion1504may further optimize the light-emitting device in terms of structure and increase reliability thereof.

The third portion1504of the conductive bridging element150defines a bisecting line that geometrically divides itself into two symmetrical halves in the top view of the light-emitting device. As shown inFIG.16, the bisecting lines of the first portion1501and the body portion1503coincide with each other in a first line L1. The bisecting line of the third portion1504is parallel to the first line L1. Further, the second portion1502has a first end E1that is proximate to a respective one of the two opposite boundaries of the light-emitting device, and the third portion1504extends from the first end E1of the second portion1502in a direction of the first line. It is noted that an alignment offset may occur between the bisecting lines of the first portion1501and the body portion1503which is caused by process error during fabrication of reticles, and which is known to those skilled in the art of semiconductor fabrication.

In other embodiments, the bisecting line of the third portion1504may coincide with the bisecting line of the body portion1503in a second line. The body portion1503has a second end distal from the respective boundary of the light-emitting device, and the first portion1501extends from the second end of the second portion1502in a direction of the second line.

In this embodiment, the respective one of the exposed portions1121of the first type semiconductor layer112A of the second mesa structure112has an area larger than that of the first embodiment so as to allow the third portion1504of the conductive bridging element150to be disposed on the first type semiconductor layer112A of the second mesa structure112. It can be seen that the second type semiconductor layer.112B of the second mesa structure112has three different widths in the Y-direction, as shown by the dotted lines inFIG.14. Further, the conductive bridging element150has a larger contact area on the first type semiconductor layer.112A of the second mesa structure112with respect to that of the first embodiment, which is beneficial to connect the first and second mesa structures111,112in series with lower resistance, thereby improving reliability of final products.

In this embodiment, the tail portion1302of the current blocking element130has a width W32that is at least 1.5 times larger than a width W31of the head portion1301. For example, the tail portion1302may have a width W32that is 1.5 times, 2 times, or even 2.5 times larger than a width W31of the head portion1301.

In this embodiment, each of the central portion1321and two extending portions1322of the current blocking structure132have a bisecting line that geometrically divides each of the central portion1321and two extending portions1322of the current blocking structure132into two symmetrical halves in the top view of the light-emitting device. The bisecting lines of the central portion1321and two extending portions1322coincide with each other in a third line L3. The third line is parallel to the first line L1, as shown inFIG.15.

Accordingly, the central part1521and the two extending parts1522of the conductive bridging element150extend along the third line L3.

In this embodiment, the projection image of the second conductive pad172has an intervening part located between the projection images of the conductive bridging elements150. The projection images of the first and second conductive pads171,172are substantially two-fold rotationally symmetrical, as shown inFIG.18. That is, the projection images of the first and second conductive pads171,172are roughly two-fold rotationally symmetrical, except that the shape of the respective intervening part may be slightly different.

Embodiment 3

Referring toFIGS.19to21, a third embodiment of the light-emitting device is similar to the second embodiment of the light-emitting device, except that the first conductive block151is in a form of round head nail in the top view of the light-emitting device, and the shape of the exposed portion1111of the first type semiconductor layer111A of the first mesa structure111is adjusted accordingly.

The first conductive block151has a bisecting line that geometrically divides the first conductive block151into two symmetrical halves in the top view of the light-emitting device. The bisecting line of the first conductive block151is parallel to the first line L1, and coincides with that of the first mesa structure111, which is beneficial to current spreading.

In this embodiment, the first conductive block151includes a head part1511and a tail part1512that extends from the head part1511toward the second mesa structure112.

In this embodiment, the first via1601is formed to expose the head part1511of the first conductive block151.

Embodiment 4

Referring toFIG.22, a fourth embodiment of the light-emitting device is similar to the second embodiment of the light-emitting device, except that the second conductive block152has a projection image located within that of the second conductive pad172in the top view of the light-emitting device.

That is, the second conductive pad172has a boundary extending outside the projection image of the second conductive block152instead of intersecting with thereof, such that the second conductive pad172is smoothly disposed on the first distributed Bragg reflective layer.160, thereby allowing the second conductive pad172to receive uniform force when subjected to external pushing or pulling forces. Thereby, peeling of the boundary of the second conductive pad172, which often occurs in an area where the boundaries of the second conductive pad172and the second conductive block152intersects, is reduced.

In some embodiments, the boundaries of the second conductive pad172and the second conductive block152has a distance of at least 8 μm, which may further reduce probability of the boundary of the second conductive pad172being peeled off.

In some embodiments, although the current blocking structure132disposed beneath the second conductive block152is beneficial to light emitting, yet, in the case that a flexible chip carrier that is easily deformable is used in packaging, the current blocking structure132may be omitted from the light-emitting device for reducing the risk of breaking thereof caused by deformation of the chip carrier.

Embodiment 5

Referring toFIGS.23to27, a fifth embodiment of the light-emitting device is similar to the first embodiment of the light-emitting device, except that the number of the conductive bridging element150and the current blocking element130of the light-emitting device is one. Thus, the conductive bridging element150and the current blocking element130are located at a bisecting line of the first and second mesa structures111,112.

The number and shape of the exposed portion1121of the first type semiconductor layer.112kof the second mesa structure112are adjusted accordingly.

Further, the body portion1503of the conductive bridging element150and the tail portion1302of the current blocking element130are relatively larger than those of the first embodiment, which improves reliability of final products due to lower resistance.

In this embodiment, the head portion1301has a width W31that is larger than a width W32of the tail portion1301.

Accordingly, the first portion1501of the conductive bridging element150has a width W51which is larger than that of the body portion1503. Besides, the second portion1502has a width W52which is larger than that of the body portion1503. That is, the first and second portions1501,1502are relatively blunt with respect to the body portion1503.

Similarly, the first width difference D1is larger than the second width difference D2to ensure conductive function of the conductive bridging element150and to avoid current leakage, thus increasing reliability of final products. Details regarding the first width difference D1and the second width difference D2are similar to those described above with reference toFIG.7.

Embodiment 6

Referring toFIGS.28to32, a sixth embodiment of the light-emitting device is similar to the third embodiment of the light-emitting device, except that the number of the conductive bridging element150and the current blocking element130of the light-emitting device is one. The conductive bridging element150and the current blocking element130are located in corresponding position proximate to a boundary of the light-emitting device.

Besides, the first conductive block151is located at a diagonal corner of the first mesa structure112with respect to the conductive bridging element150in the top view of the light-emitting device, which is beneficial to current spreading. In this embodiment, the first conductive block151is located at upper left corner of the first mesa structure112.

In some embodiments, the light-emitting device may further include a third mesa structure that is similar in composition to that of the first mesa structure111. The third mesa structure may be electrically connected in series to the second mesa structure112by an extra conductive bridging element and an extra current blocking element, detailed structure of which may be obtained by referring to any of the above-mentioned embodiments. In other embodiments, the light-emitting device may include a fourth mesa structure or even more.

The light-emitting device of the disclosure may be further packaged into a module, and serves as a light source in a light-emitting module of a backlight display.

In some embodiments, a light-emitting module in accordance with the disclosure includes the light-emitting device as described in any of the above-mentioned embodiments.

In some embodiments, a display apparatus in accordance with the disclosure includes a backlighting module and the light-emitting device as described in any of the above-mentioned embodiments, which serves as a light source of the backlighting module.

In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.

While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.