Organic light-emitting diode module

Organic Light Emitting Diode Module

The present invention relates to a light-emitting module, and particularly an organic light-emitting diode module.

Organic electroluminescence display is a kind of self-luminous (Emissive) display. Because organic electroluminescent display has no viewing angle limitation, low manufacturing cost, high response speed (about 100 times that of liquid crystal), power saving, DC drive that can be used for portable machines, large operating temperature range, light weight and With hardware equipment miniaturization and thinning, etc. Therefore, organic electroluminescent devices have great development potential and are expected to become the next generation of novel flat-panel displays.

The organic electroluminescent display is composed of two wire layers and an organic light-emitting layer sandwiched between the two wire layers. The lower wire layer is generally made of transparent conductive material so that the light generated by the organic light-emitting layer can penetrate out. However, the longer the organic light-emitting layer is from the external electrode, the longer the lead, the greater the resistance, and the greater the voltage drop caused by the resistance. Therefore, the smaller the voltage across the organic light-emitting layer, the greater the brightness. Small.

Therefore, when the organic electroluminescent display develops toward a large size, the pressure drop across the organic light-emitting layer will be significantly different. As a result, the uniformity of the display will be poor.

The conventional solution to the above situation is usually to increase the cross-sectional area of the wire layer to increase the amount of power transmission, or to increase the position of the contact point between the flexible circuit board and the substrate to increase the number of signal input contacts. However, the former will increase the size of the substrate or reduce its aperture ratio, while the latter will increase the volume of the flexible circuit board providing the contacts and the cost of the wiring process. Therefore, the above-mentioned problems cannot be effectively solved.

The present invention provides an organic light emitting diode module, which has a stable voltage supply and produces relatively uniform brightness.

An embodiment of the present invention provides an organic light emitting diode module, which includes a substrate, at least one wire, a wire layer disposed on the substrate, an organic light emitting element layer, and a plurality of conductive units. The organic light emitting element layer and the conductive unit are respectively electrically connected to the wire layer. The wire is arranged beside the conductive unit and is electrically connected to the conductive unit at the same time.

In an embodiment of the present invention, the connection between each of the above-mentioned conductive units and the wire layer has a rough surface.

In an embodiment of the present invention, it further includes a conductive adhesive layer disposed between the conductive units and the wire layer.

In an embodiment of the present invention, the aforementioned conductive unit is located on the periphery of the substrate.

In an embodiment of the present invention, the above-mentioned organic light-emitting element layer includes a plurality of organic light-emitting diode units arranged in an array. The wire passes through the substrate to connect the conductive unit between any two organic light emitting diode units.

In an embodiment of the present invention, the above-mentioned conductive unit is substantially a conductive bump or a conductive bump disposed on the substrate.

In an embodiment of the present invention, the above-mentioned conductive unit is substantially an elastic member arranged on a substrate and having a conductive material.

In an embodiment of the present invention, the voltage drop of each conductive unit with respect to the substrate after the above-mentioned conduction is less than 10Ω.

Based on the above, in the above-mentioned embodiments of the present invention, the organic light-emitting diode module provides the voltage source required by the organic light-emitting element layer through the conductive units on the module and the wires electrically connecting the conductive units. What's more, by this, every part of the organic light-emitting element layer can receive a stable voltage, thereby avoiding the conventional voltage drop caused by the difference in the distance of the wire layer, and the voltage received by the organic light-emitting element layer is different. , Resulting in the problem of different luminous efficacy of the organic light-emitting device layer.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a top view of an organic light emitting diode module according to an embodiment of the invention. 2 is a cross-sectional view of the organic light emitting diode module of FIG. 1 along the line AA'. Please refer to FIGS. 1 and 2 at the same time. In this embodiment, the organic light emitting diode module 100 includes a substrate 110, a wire layer 120, an organic light emitting element layer 130, and a plurality of conductive units disposed on the substrate 110 140. Wires 150 arranged beside the conductive units 140 and electrically connected to the conductive units 140 at the same time, and a frame 160 for accommodating the above-mentioned components. The organic light emitting element layer 130 and the conductive unit 140 are electrically connected to the wire layer 120 respectively. In this embodiment, only two wires 150 are shown, but this embodiment is not limited to this. Based on the above, the organic light-emitting diode module 100 of this embodiment uses the conductive unit 140 disposed on the substrate 110 as a voltage source for providing the organic light-emitting element layer 130, so that the voltage across the organic light-emitting element layer 130 The values are close to the same, so that the light-emitting brightness of the organic light-emitting element layer 130 can be uniformized everywhere.

In detail, the substrate 110 is a transparent substrate, which may be a transparent glass substrate or a transparent flexible substrate. The substrate 110 is mainly used to carry the components of the organic electroluminescence device. In order to allow the light generated by the organic electroluminescence element to be transmitted from the substrate 110, the substrate 110 is made of a transparent or light-transmitting material. Generally speaking, the organic electroluminescence device that emits light from the substrate 110 is also called a bottom emission type organic electroluminescence device.

The organic light emitting element layer 130 is located on the substrate 110. In particular, the organic light emitting element layer 130 includes a first electrode layer 132, a light emitting layer 134, and a second electrode layer 136. The first electrode layer 132 is disposed on the substrate 110, and the light emitting layer 134 is disposed on the first electrode layer 132, and The second electrode layer 136 is disposed on the light-emitting layer 134. The first electrode layer 132 is a transparent electrode layer, and its material can be metal oxide, such as indium tin oxide or indium zinc oxide. The light-emitting layer 134 is an organic light-emitting layer, which may include a red organic light-emitting pattern, a green organic light-emitting pattern, and a blue organic light-emitting pattern or different colors (for example, white, orange, purple, etc.) generated by mixing light of various spectrums. pattern. The second electrode layer 136 may be a metal electrode layer. According to other embodiments not shown, the organic light emitting element layer 130 may further include an electron input layer, a hole input layer, an electron transport layer, a hole transport layer, and so on.

In this embodiment, the conductive unit 140 is substantially a conductive bump or a conductive bump disposed on the periphery of the substrate 110. After the organic light emitting diode module 100 is assembled, the conductive unit 140 will directly press against the wire layer 120, so that the conductive unit 140 has a pressing pressure on the wire layer 120, which is preferably >50g/cm². Furthermore, the connection between the conductive unit 140 and the wire layer 120 has a rough surface S1 for increasing the local pressure on the conductive unit 140 and the substrate 110. In this embodiment, the rough surface S1 can be manufactured by embossing the surface of the conductive unit 140, but it is not limited to this as the only way.

In addition, the organic light emitting diode module 100 of the present embodiment further includes a conductive adhesive layer 170, which is, for example, a conductive adhesive is coated between the conductive unit 140 and the wire layer 120, which can also increase the conductive unit 140 and Electrical connection between the wire layers 120. Similarly, any means for increasing the electrical connection between the conductive unit 140 and the wire layer 120 can be applied to this embodiment.

On the other hand, the voltage drop of the conductive unit 140 to the substrate 110 after conduction must be less than 10Ω, so that the current passing through the conductive unit 140 tends to be uniform and the voltage value of the organic light-emitting element layer 130 is close to the same. The organic light-emitting diode module has a relatively stable luminous efficacy.

3 is a cross-sectional view of an organic light emitting diode module according to another embodiment of the invention. Please refer to FIG. 3, which is different from the above-mentioned embodiment. In this embodiment, the conductive unit 240 is essentially an elastic member that is disposed on the substrate 110 and has a conductive material, and the conductive unit 240 is clamped on the substrate 110. It can be electrically connected to the wire 110 at the same time. In other words, in this embodiment, the organic light emitting diode module 200 can also use a conductive clamp disposed on the substrate 110 as the conductive unit 240, and electrically connect the wires 110 to the conductive units 240 In order to provide the voltage source required by the organic light emitting element layer 130.

It can be seen from the above embodiments that any conductive bumps, conductive bumps, or conductive elastic members disposed on the substrate 110 can be electrically connected to the wires 150 to provide the organic light emitting element layer 130 The required voltage source, and thus the voltage values at all parts of the organic light emitting element layer 130 are nearly the same.

4 is a top view of an organic light emitting diode module according to another embodiment of the invention. 5 is a cross-sectional view of the organic light emitting diode module of FIG. 4 along the line BB'. Please refer to FIGS. 4 and 5 at the same time. In this embodiment, the organic light emitting element layer 330 includes a plurality of organic light emitting diode units 332 (only two of which are shown here) arranged in an array, and the wires 350 pass through the substrate 110. The conductive unit 340 between any two organic light emitting diode units 332 is connected (here, a conductive bump or a conductive bump is taken as an example). Therefore, no matter how the organic light-emitting diode unit 332 is configured, the organic light-emitting diode module 300 can be powered by the conductive unit 340 on the substrate 110, so as to prevent the conventional wire layer 120 from being affected by the distance. It is supplied to the voltage of the organic light emitting diode unit 332.

To sum up, in the above-mentioned embodiments of the present invention, the organic light-emitting diode module uses the conductive unit disposed on the substrate to stabilize the voltage of the organic light-emitting element layer, and avoid the distance and distance of the wire layer. The resistance affects the power supply efficiency to the organic light-emitting device layer. Furthermore, the conductive unit may be a conductive bump or a conductive bump on the substrate, or a conductive elastic clamp arranged on the substrate. In other words, using the existing components of the organic light emitting diode module itself can achieve the effect of providing a stable voltage source. In this way, the organic light emitting diode module has to have a stable luminous performance because of the stable voltage at every location.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be subject to those defined by the attached patent application scope.

<p>100. . . Organic Light Emitting Diode Module</p><p>110. . . Substrate</p><p>120. . . Wire layer</p><p>130, 330. . . Organic light-emitting element layer</p><p>132. . . First electrode layer</p><p>134. . . Luminescent layer</p><p>136. . . Second electrode layer</p><p>140, 240. . . Conductive unit</p><p>150, 350. . . wire</p><p>160. . . frame</p><p>170. . . Conductive adhesive layer</p><p>332. . . Organic Light Emitting Diode Unit</p><p>S1. . . Rough surface</p>

FIG. 1 is a top view of an organic light emitting diode module according to an embodiment of the invention.

FIG. 2 is a cross-sectional view of the organic light emitting diode module of FIG. 1 along the line AA'.

3 is a cross-sectional view of an organic light emitting diode module according to another embodiment of the invention.

4 is a top view of an organic light emitting diode module according to another embodiment of the invention.

5 is a cross-sectional view of the organic light emitting diode module of FIG. 4 along the line BB'.