Display device and method for packaging same

A display device and a method for packaging the display device are disclosed. The display device includes an optical module including multiple light-emitting units disposed apart from one another and a first plastic layer. Each light-emitting unit includes at least three LEDs, and the first plastic layer fills the gaps between the light-emitting units. The display device further includes a driver IC including a second plastic layer, driving chips, through-holes, a first structure and a second structure. The second plastic layer fills the gaps between the driving chips, and the second plastic layer has a third layer. The through-holes penetrate through the second plastic layer along a thickness direction of the through-holes and are filled with a conductive material. The first structure is electrically connected to the driving chips and to the conductive material in the through-holes. The second structure is electrically connected to the conductive material in the through-holes.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority of Chinese patent application number 201811191210.8, filed on Oct. 12, 2018, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to the field of display technology and, in particular, to a display device and a method for packaging it.

BACKGROUND

Display devices, which convert acquired or stored information into visual information and display the visual information, have been widely used in various applications such as homes or commercial facilities.

A display device may be a monitor connected to a personal computer (PC) or a server computer, a portable computer device, a navigation device, a conventional television (TV), an internet protocol television (IPTV), a smart phone, a tablet PC, a personal digital assistant (PAD), a portable terminal such as a cellular phone, any one of various display devices for reproducing an advertisement or a movie, or an audio/video system of any type. Display devices can display still or moving images to the users in many display forms.

However, some commonly-used conventional display devices, such as liquid crystal displays (LCDs) which include an LCD module and a backlight module, require a stringent selection of lamps or LEDs used in the backlight module so as to achieve a desired brightness and a color temperature. Additionally, the LCD module is further required to be capable of color temperature control and even have a special design to this end. This imposes demanding requirements on the whole structure and leads to a large footprint. Some other commonly-used conventional display devices, such as an organic light-emitting diode (OLED) display devices which include a display module but not any backlight module, are not based on a mature technology and thus associated with various issues such as a lower transmittance or a short service lifetime. Moreover, when light-emitting units are driven by driving chips, the driving chip is incapable of individually controlling light-emitting units.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a display device and a method for packaging such a display device so as to allowing space savings and electrical adjustments in terms of LED brightness and color temperature.

To this end, in one aspect, the present invention provides a display device comprising: an optical module comprising a plurality of light-emitting units disposed apart from one another and a first plastic layer, each of the light-emitting units comprising at least three light-emitting diodes LEDs with different colors, the LEDs disposed apart from one another, each of the LEDs comprising a light-emitting layer and a first soldering layer, the first soldering layer provided with solder pads, the first plastic layer filling gaps between the plurality of light-emitting units and between the LEDs such that the LEDs and the light-emitting units fixed and electrically isolated, the first plastic layer comprising a first layer and a second layer opposing the first layer, the first soldering layers and the second layer located on a same side of the optical module, the solder pads provided on the first soldering layers exposed at the second layer; and

a driver IC comprising a plurality of driving chips, a second plastic layer, a plurality of through-holes, a first structure and a second structure, each of the driving chips comprising a second soldering layer and a backside opposing the second soldering layer, the second soldering layer provided with solder pads, the driving chips disposed apart from one another, the second plastic layer filling gaps between the plurality of driving chips such that the driving chips are fixed together while electrically isolated, the second plastic layer comprising a third layer and a fourth layer opposing the third layer, the second soldering layers and the third layer located on a same side of the driver IC, the plurality of through-holes penetrating through the second plastic layer along a thickness direction of the second plastic layer, the first structure located on the third layer, the first structure electrically connected to the driving chips via the solder pads on the second soldering layers, the first structure electrically connected to the conductive material in the through-holes, the second structure arranged on the fourth layer, the second structure electrically connected to the conductive material in the through-holes,

wherein the optical module is bonded to the driver IC, with the second layer facing toward the third layer, such that each bonded driving chip is able to independently control turn on/off of the LEDs in at least one of the light-emitting units and independently electrically adjust their brightness and color temperatures of the LEDs in at least one of the light-emitting units.

Optionally, the first structure may comprise a first passivation layer, a first metal layer and a second passivation layer, the first metal layer comprising a plurality of first welding pads, the first passivation layer covering the third layer and the second soldering layers, the first metal layer located on a partial area of the first passivation layer, the second passivation layer covering the first passivation layer and the first metal layer, the first and second passivation layers configured to electrically isolate the first metal layer to prevent a short circuit in the first metal layer, the plurality of first welding pads exposed at the second passivation layer.

Optionally, a layer of the second passivation layer opposing the third layer and the fourth layer may constitute, together with the exposed plurality of first welding pads, a bonding layer of the driver IC.

Optionally, first and second connecting holes may be provided in the first passivation layer, the first and second connecting holes filled with a conductive material, the conductive material filled in the first and second connecting holes having a first end electrically connected to the first metal layer and a second end electrically connected the conductive material in the through-holes and to the solder pads arranged on the second soldering layers, thereby an electrical connection of the driver IC on the third layer is achieved.

Optionally, the second structure may comprise a third passivation layer, a second metal layer and a fourth passivation layer, the second metal layer comprising a plurality of second welding pads, the third passivation layer covering the fourth layer, the second metal layer located on a partial area of the third passivation layer, the fourth passivation layer covering the third passivation layer and the second metal layer, the third and fourth passivation layers configured to electrically isolate the second metal layer to prevent a circuit in the second metal layer, the plurality of second welding pads exposed at the fourth passivation layer.

Further, the third passivation layer is provided with third connecting holes, the third connecting holes filled with a conductive material, the conductive material filled in the third connecting holes having a first end electrically connected to the second metal layer and a second end electrically connected to the conductive material filled in the through-holes, thereby circuits on the third layer of the driver IC are electrically connected to circuits on the fourth layer of the driver IC.

Optionally, the solder pads on the first soldering layers may be electrically connected to the first welding pads exposed at the bonding layer of the driver IC by bonding.

Optionally, each of the light-emitting units may comprise three LEDs, the three LEDs sequentially having colors of red, green and blue.

Optionally, the LEDs may include gallium arsenide LEDs.

Optionally, each of the LEDs is provided with an anode solder pad and a cathode solder pad on the first soldering layer.

Optionally, the display device may have a thickness smaller than or equal to 0.5 mm.

Optionally, each pixel corresponding to a light-emitting unit is configured for red, green and blue light emissions.

Optionally, the driver IC is configured to control 4-8 pixels.

In another aspect, the present invention provides a method for packaging a display device, comprising the steps of: providing a first support plate and a second support plate, the first support plate provided with a first adhesive layer on one layer of the first support plate, the second support plate provided with a second adhesive layer on one layer of second support plate;

placing at least one optical module to be packaged onto the first adhesive layer at an interval, the optical module comprising a plurality of light-emitting units disposed apart from one another, wherein each of the light-emitting units comprises at least three light-emitting diodes LEDs with different colors, the at least three LEDs disposed apart from one another, each of the LEDs comprising a light-emitting layer and a first soldering layer, the first soldering layer provided with solder pads, the first soldering layer facing toward the first adhesive layer, wherein the LEDs in the plurality of light-emitting units have a same arrangement order and direction, and wherein the at least one optical module to be packaged is oriented in a same direction, placing at least one driver IC to be packaged onto the second adhesive layer at an interval, the driver IC comprising a plurality of driving chips, each of the driving chips comprising a second soldering layer and a backside opposing the second soldering layer, the second soldering layer provided with solder pads, the driving chips disposed apart from one another with a backside of each of the plurality of driving chips facing toward the second adhesive layer, the at least one driver IC to be packaged oriented in a same direction;

filling gaps between the at least one optical module to be packaged, between the plurality of light-emitting units and between the LEDs with a plastic material and curing the plastic material to form a first plastic layer, the first plastic layer comprising a first layer and a second layer opposing the first layer, the first soldering layers and the second layer located on a same side of the optical module, the solder pads on the first soldering layers exposed at the second layer, filling gaps between the at least one driver IC to be packaged and between the plurality of driving chips with the plastic material and curing the plastic material to form a second plastic layer, the second plastic layer comprising a third layer and a fourth layer opposing the third layer, the second soldering layers and the third layer located on a same side of the driver IC;

removing the first and second support plates;

forming a plurality of through-holes in the second plastic layer, each through-hole penetrating through the second plastic layer along a thickness direction of the second plastic layer, filling the through-holes with a conductive material, forming a first structure on the third layer, the first structure first structure electrically connected to the driving chips via the solder pads on the second soldering layers and to the conductive material in the through-holes, and forming a second structure on the fourth layer, the second structure electrically connected to the conductive material in the through-holes;

bonding the optical module and the driver IC with the second layer facing toward the third layer, such that the bonded driving chips is able to independently turn on/off of the LEDs in at least one of the light-emitting units and independently electrically adjust brightness and color temperatures of the at least one of the light-emitting units; and

separating the bonded optical and driver ICs so as to obtain as the display device.

Optionally, the first structure may comprise a first passivation layer, a first metal layer and a second passivation layer, the first metal layer comprising a plurality of first welding pads, the first metal layer configured to electrically connection of the solder pads in the driving chips of the driver IC and to electrically connect the conductive material in the through-holes, the second passivation layer covering the first metal layer with the plurality of first welding pads exposed at the second passivation layer, wherein a layer of the second passivation layer opposing the third layer and the fourth layer constitutes, together with the exposed first welding pads, a bonding layer of the driver IC.

Optionally, the second structure may comprise a third passivation layer, a second metal layer and a fourth passivation layer, the second metal layer comprising a plurality of second welding pads, the fourth passivation layer covering the second metal layer with the plurality of second welding pads exposed at the fourth passivation layer, the second metal layer electrically connected to the conductive material filled in the through-holes.

Compared to the prior art, in the display device and the packaging method of the present invention. The various constituent components of the optical module are fixed by the first plastic layer, and the various constituent components of the driver IC are fixed by the second plastic layer. Additionally, the circuits on the third layer are transferred onto the fourth layer by the first and second structures and by the conductive material filled in the through-holes in the second plastic layer. Further, the optical module is bonded to the driver IC, so that the optical module is electrically connected to the driving chips, and the driving chip can individually control the light-emitting units so as to electrically adjust their brightness and color temperatures as practically desired. This dispenses with the need for applying strict color temperature and brightness control during the selection of the LEDs, and space in the display device can be saved.

DETAILED DESCRIPTION

A specific embodiment of the present invention will be described in greater detail below with reference to the accompanying drawing. Features and advantages of the invention will be more readily apparent from the following detailed description and from the FIGURE. However, it is noted that the concept of the invention can be implemented in various forms and not limited to the specific embodiment disclosed herein. The FIGURE is provided in a very simplified form not necessarily presented to scale, with the only intention to facilitate convenience and clarity in explaining the embodiment.

It is noted that, for the sake of simplicity and clarity, the appended schematic cross-sectional view only shows two light-emitting units as an example.

The schematic cross-sectional view ofFIG. 1illustrates a display device according to the embodiment. As shown, the embodiment provides a display device. The display device includes an optical module100including a plurality of light-emitting units110(i.e., pixels). Each light-emitting unit includes at least three light-emitting diodes (LEDs) with different colors. The at least three light-emitting diodes are disposed apart from one another and adjacent two light-emitting units110are disposed apart from one another. Each of the order of the color arrangement and position of the at least three light-emitting diodes of each light-emitting unit100is the same.

In this embodiment, each of the light-emitting units110includes, for example, three LEDs111,112,113with different colors. The colors of the three LEDs111,112,113are red, green and blue respectively. The LEDs are, for example, gallium arsenide (AsGa) LEDs. The three LEDs111,112,113are disposed apart from one another and adjacent two light-emitting units110are disposed apart from one another. Each of the order of the color arrangement and position of the LEDs111,112,113of each light-emitting unit100is the same. For example, from left to right, the three LEDs with red light, blue light and green light are arranged in a line.

In other embodiments, each of the light-emitting units110may also include four LEDs with, for example, red, green, blue and white or a different set of colors. The colors may be selected based on practically requirements. Certainly, each of light-emitting units110may also include more than four LEDs with different colors.

Each of the LEDs has a light-emitting layer110aand a backside (i.e., a first soldering layer110b) opposing the light-emitting layer110a. On the first soldering layers110bof the LED are provided with solder pads130. In particular, an anode solder pad131and a cathode solder pad132are provided on the first soldering layer110bof the LED.

The optical module100further includes a first plastic layer120that fills the gaps between the plurality of light-emitting units110and between the LEDs so as to fix and electrically isolate the LEDs from one another. The first plastic layer120includes a first layer120aand a second layer120bopposing the first layer120a. That is, the first plastic layer120includes a first layer120ahaving a direction as same as a direction of the light-emitting layers110aand a second layer120bhaving a direction as same as a direction of the first soldering layers130b. In other words, the light-emitting layers110aand the first layer120aare located on the same side of the optical module100, while and first soldering layers130band the second layer120bare located on the other side of the optical module100. The light-emitting layers110aare exposed at the first layer120a, and the solder pads130on the first soldering layers130bare exposed at the second layer120b. That is, the second layer120bexposes the anode solder pads131and the cathode solder pads132of the LED. The first plastic layer120has a thickness smaller than 0.5 mm. That is, a distance between the first layer120aand the second layer120bis smaller than 0.5 mm.

The display device further includes a driver IC200including a plurality of driving chips210. Each driving chip210has a second soldering layer210aand a backside opposing the second soldering layer210a. The second soldering layers210aof all the driving chips210are located on the same side of the driver IC200, while the backsides of all the driving chips210are located on the other side of the driver IC200. Solder pads are provided on the second soldering layers210aof the driving chips210. These driving chips210are disposed apart from one another. The driving chips210are configured to switch on or off the LEDs and electrically adjust their brightness levels and color temperatures.

The driver IC200further includes a second plastic layer220that fills the gaps between the plurality of the driving chips210so as to fix and electrically isolate the driving chips from one another. The second plastic layer220has a third layer220aand a fourth layer220bopposing the third layer220a. The third layer220aof the second plastic layer220has a direction as same as the direction of second soldering layers210a, and the fourth layer220bhas a direction as same as the direction of the backsides opposing the second soldering layers210a. In other words, the second soldering layers210aand the third layer220aare located on the same side of the driver IC200, and the fourth layer220band the backsides of the driving chips210are located on the other side of driver IC200. The solder pads211in the driving chips210are exposed at the third layer220a. The second plastic layer220has a thickness smaller than 0.5 mm. That is, a distance between the third layer220aand the fourth layer220bis smaller than 0.5 mm.

The driver IC200further includes a plurality of through-holes221formed in the second plastic layer220. Each of the through-holes221penetrates through the second plastic layer220along a thickness direction of the second plastic layer. The through-holes221are filled with a conductive material so as to electrically connect circuits on the third layer220ato circuits on the fourth layer220b. Specifically, the conductive material filled in the through-holes221accomplishes electrical connection of the solder pads211in the driving chips to the fourth layer220bvia the filled conductive material in the through-holes221so that the driving chips210in the driver IC are allowed to be selected from chips of different manufacturers or models with identical functions based on the practical needs, without having to integrate chips specially designed to address the need, thereby diversifying the chip source.

The conductive material is, for example, a conductive metal such as Cu (copper), W (tungsten), Ag (silver) or Au (gold), a conductive alloy or a conductive adhesive.

Provided on the third layer220ais a first structure230electrically connected to the conductive material in the through-holes221. The first structure230is electrically connected to the driving chips210via the solder pads211arranged on the second soldering layers210a. The first structure230includes a first passivation layer231, a first metal layer232and a second passivation layer233. The first metal layer232includes a plurality of first welding pads2321. The first passivation layer231covers the third layer220aand the second soldering layers210a. The first metal layer232is located on part of the first passivation layer231, and the second passivation layer233covers both the first passivation layer231and the first metal layer232. The first passivation layer231and second passivation layer233are configured for electrical isolation of the first metal layer232so as to immunize the first metal layer from any short circuit. The plurality of first welding pads2321are exposed from the second passivation layer233. A layer of the second passivation layer233that faces away from the third layer220aand the fourth layer220bconstitutes a bonding layer230aof the driver IC200, together with the exposed plurality of first welding pads2321.

Preferably, each of the first and second passivation layers231,233is an insulating material such as a polymer. For example, each of the first and second passivation layers is polyimide, benzocyclobutene (BCB), poly(p-phenylene benzobisoxazole) (PBO) or a combination thereof. The first and second passivation layers231,233may be either formed by the same material or different materials.

In this embodiment, the first and second passivation layers231,233are formed by the same material such as polyimide.

The first metal layer232may be an inorganic material such as Cu, Ag, W, Au or another metal, a conductive alloy or a conductive oxide (e.g., ITO), or a conductive organic material such as a conductive polymer. The first metal layer232has a thickness above the layer of the first passivation layer231of about 3-10 μm, preferably 3-5 μm.

The first passivation layer231may be provided with first and second connecting holes filled with a conductive material electrically. The conductive material filled in the first and second connecting holes has a first end connected to the first metal layer232and a second end connected to the conductive material in the through-holes221and to the solder pads211in the driving chips210, thus an electrical connection of the driver IC200on the third layer220ais achieved.

A second structure240is provided on the fourth layer220b. The second structure240is electrically connected to the conductive material in the through-holes221. The second structure240includes a third passivation layer241, a second metal layer242and a fourth passivation layer243. The second metal layer242includes a plurality of second welding pads2421, and the third passivation layer241covers the fourth layer220b. The second metal layer242is located on part of the third passivation layer241, and the fourth passivation layer243covers both the third passivation layer241and the second metal layer242. The third passivation layer241and the fourth passivation layer243are configured for electrical isolation of the second metal layer242so as to avoid a short in the second metal layer. The plurality of second welding pads2421are exposed from the fourth passivation layer243. The plurality of second welding pads2421are connected the display device to other devices.

Preferably, each of the third and fourth passivation layers241,243is an insulating material such as a polymer. For example, each of them is polyimide, benzocyclobutene (BCB), poly(p-phenylene benzobisoxazole) (PBO) or a combination thereof. It is possible that all of the first, second, third and fourth passivation layers231,233,241and243are made of the same material, or some of them are made of the same material, or each of them is made of a different material.

In this embodiment, the third and fourth passivation layers241,243are formed by the same material such as polyimide.

The second metal layer242may be an inorganic material such as Cu, Ag, W, Au or another metal, a conductive alloy or a conductive oxide (e.g., ITO), or a conductive organic material such as a conductive polymer. The second metal layer242has a thickness above the layer of the third passivation layer241of about 3-10 μm, preferably 3-5 μm.

The third passivation layer241may be provided with third connecting holes filled with a conductive material. The conductive material of the third connecting hole has a first end electrically connected to the second metal layer242and a second end connected to the conductive material in the through-holes221such that electrical connection of circuits on the third layer220aof the driver IC200to circuits on the fourth layer220bis achieved, that is, an electrical connection of the driver IC200is achieved.

The optical module100is electrically connected to the driver IC200by bonding them together. The second layer120bis orientated to the third layer220a. Specifically, the solder pads130on the first soldering layers110bof the optical module100are electrically connected to the first welding pads2321exposed at the bonding layer230aof the driver IC200by bonding thereof. In other words, the solder pads130arranged on the first soldering layers are bonded and thereby electrically connected to the first welding pads2321exposed from the second passivation layer233, so that subsequent to the bonding, each of the driving chips210in the driver IC200is able to control at least one of the light-emitting units110. That is, the driving chip210can switch on/off at least three LEDs and electrically adjust their brightness and color temperatures. Further, each of the driving chips210can independently control at least one of the light-emitting unit110. That is, the driving chip210can independently turn on/off the at least three LEDs in each light-emitting unit110and independently adjust brightness levels and color temperatures of the at least three LEDs in each light-emitting unit110. The driving chips210can control and adjust currents following in the individual LEDs in the light-emitting units110, thereby electrically adjusting the color temperatures and brightness of the light-emitting units110as practically desired. This dispenses with the need for applying strict color temperature and brightness control during the selection of the LEDs, ensuring the availability of sufficient sources of these components. The bonded optical module100and driver IC200have a total thickness that is smaller than or equal to 0.5 mm. That is, the display device has a thickness of smaller than or equal to 0.5 mm. Therefore, compared to the conventional display devices (e.g., LCDs), the display device allows space savings.

Preferably, in order lower a circuit complexity between the optical module100and the driver IC200, the cathode solder pads132for some or all the LEDs in each of the light-emitting units110controlled by the driving chips210are electrically connected in parallel.

In this embodiment, each of the driving chips210independently turns on/off the three LEDs111,112,113in a corresponding one of the light-emitting units110and adjusts brightness and color temperatures of the three LEDs111,112,113in the light-emitting unit110.

With continued reference toFIG. 1, in this embodiment, there is also provided a packaging method for a display device, which includes the following steps.

In step S1, providing a first support plate and a second support plate. A first adhesive layer is formed on one layer of first support plate and a second adhesive layer is formed on one layer of the second support plate. The first and second support plates has s shape of, for example, square or circle.

In step S2, placing at least one optical module100to be packaged on the first adhesive layer at an interval. The optical module100includes a plurality of light-emitting units110. The adjacent two light-emitting units110are arranged apart from one another. Each of the light-emitting units110includes at least three LEDs111,112,113with different colors. For example, three LEDs111,112,113respectively emit, for example, red, green and blue light. The at least three LEDs are disposed apart from one another. Each of the LEDs has a light-emitting layer110aand a first soldering layer110b. The solder pads130are provided on the first soldering layer110b. The first soldering layers110bof the optical module100faces toward the first adhesive layer. Each of an arrangement and direction of the at least three LEDs with different colors in the plurality of light-emitting units110is the same. The at least one optical module100to be packaged is oriented identically. At least one driver IC200to be packaged is then placed on the second adhesive layer at an interval. The driver IC200includes a plurality of driving chips210. Each driving chip210includes a second soldering layer210aand a backside opposing the second soldering layer210a. Solder pads211are provided on the second soldering layers210a, and the driving chips210are arranged apart from one another. The backside of each driving chip210faces toward the second adhesive layer. The at least one driver IC200to be packaged is oriented in the same way.

In step S3, filling a plastic material in the gaps between the at least one optical module100to be packaged, between the plurality of light-emitting units110and between the LEDs therein. The plastic material is cured to form a first plastic layer120. The first plastic layer has a first layer120aand a second layer120bopposing the first layer120a. The first soldering layers110band the second layer120bare located on the same side of the optical module100, and the solder pads130on the first soldering layers110bare exposed at the second layer120b. A plastic material is then filled in the gaps between the at least one driver IC200to be packaged and between the plurality of driving chips210. And the plastic material is cured to form a second plastic layer220. The second plastic layer220has a third layer220aand a fourth layer220bopposing the third layer220a. The second soldering layers210aand the third layer220aare located on the same side of the driver IC200.

In step S4, removing the first and second support plates.

In step S5, a plurality of through-hole221are formed in the second plastic layer220. The through-hole221penetrates through the second plastic layer220along a direction of thickness of the plastic layer22. A conductive material is filled in the through-holes221. The second plastic layer220has a third layer220aand a fourth layer220bopposing the third layer220a. A first structure230is formed on the third layer220a. The first structure230is electrically connected to the driving chips210through the solder pads211on the second soldering layers210aand is also to the conductive material in the through-holes221. The first structure230includes a first passivation layer231, a first metal layer232and a second passivation layer233. The first metal layer232includes a plurality of first welding pads2321. The first metal layer232is configured to electrically connect with the solder pads211in the driving chips210of the driver IC200as well as with the conductive material filled in the through-holes221. The second passivation layer233covers the first metal layer232with the plurality of first welding pads2321being exposed. A layer of the second passivation layer233that faces away from the third layer220aand the fourth layer220bconstitutes a bonding layer230aof the driver IC200, together with the exposed plurality of first welding pads2321. A second structure240is then formed on the fourth layer220b. The second structure240is electrically connected to the conductive material in the through-holes221. The second structure240includes a third passivation layer241, a second metal layer242and a fourth passivation layer243. The second metal layer242includes a plurality of second welding pads2421. The fourth passivation layer243covers the second metal layer242with the plurality of second welding pads2421being exposed. The second metal layer242is electrically connected to the conductive material filled in the through-holes221.

In step S6, bonding the optical module100and the driver IC200and hence an electrically connection is achieved between the optical module100and the driver IC200. The second layer120bfaces toward the third layer220a. Subsequent to the bonding, each driver IC200is configured to turn on/off the LEDs in at least one of the light-emitting units110and independently electrically adjusts their brightness and color temperatures of the LEDs of the at least one of the light-emitting units110. The first soldering layers110bin the optical module100face toward the bonding layer230aof the driver IC200.

In step S7, separating the bonded optical and driver ICs100,200so as to obtain the display device.

In this embodiment, the optical module100and the driver IC200are formed simultaneously. However, in practice, the formation of the optical module100may precede the forming of the driver IC200. Alternatively, the formation of the driver IC200may precede the forming of the optical module100.

In summary, in the display device and the packaging method for the present invention, the various constituent components of the optical module are fixed by the first plastic layer and the various constituent components of the driver IC are fixed by the second plastic layer. Additionally, the circuits on the third layer are transferred onto the fourth layer by the first and second structures and by the conductive material filled in the through-holes in the second plastic layer. Further, the optical module is bonded and thus electrically connected to the driver IC, so that the driving chips can individually control the light-emitting units so as to electrically adjust their brightness and color temperatures as practically desired. This dispenses with the need for applying strict color temperature and brightness control during the selection of the LEDs, and space in the display device can be saved.

It is to be noted that, unless otherwise stated or indicated, the terms “first”, “second”, “third”, “fourth” and the like are used herein to distinguish among various components, elements, steps, etc., without necessarily describing a particular logic or ordinal relationship among them.

It is to be understood that while the invention has been described above with reference to a preferred embodiment thereof, it is not limited to this disclosed embodiment. In light of the above teachings, any person familiar with the art may make various modifications and variations to the subject matter of the present invention or create equivalent embodiments based on equivalent changes without departing from the scope of the invention. Accordingly, any and all simple variations, equivalent changes and modifications made to the foregoing embodiments based on the substantive disclosure of the invention without departing from the scope thereof fall within the scope.