TWI535344B - OLED flat lighting device - Google Patents

Description

OLED planar lighting device

The invention relates to a lighting device, in particular to an OLED planar lighting device.

Referring to FIG. 1 , an OLED (Organic Light Emitting Diode) planar illumination device 1 includes a substrate 11 , an OLED light emitting module 12 , and a flexible printed circuit board (FPC). The substrate 11 includes a mounting surface 110 having a light emitting region 111 for the OLED light emitting module 12 and a peripheral region 113 disposed outside the light emitting region 111 and having two spaced electrode bonding regions 112. . The electrode bonding regions 112 are respectively connected to the flexible printed circuit boards 13 to provide power supply and signal transmission corresponding to the OLED lighting module 12.

Since the OLED planar illumination device 1 is in operation, a large current of more than one ampere flows through the junction of the electrode bonding region 112 and the flexible printed circuit board 13, and thus is designed on the OLED planar illumination device. The two sets of power supply contacts of the bonding area 112 are shunted, and one of the contacts of each group of power supply contacts (the contacts of the numerals 14 and 15 in the figure) is electrically connected to the anode of an external power supply (not shown). , and the other contact of each group of power supply contacts (the contacts of the numbers 16 and 17 in the figure) Connect the cathode of the external power supply to avoid large currents flowing only through a certain joint and burning.

However, since the arrangement of the contacts in the electrode bonding regions 112 is different, it is necessary to design two flexible printed circuit boards 13 having different line distributions to respectively correspond to the arrangement of the contacts of the electrode bonding regions. Not only the production cost of the flexible printed circuit board 13 is increased, but also the risk of mixing the above-described different specifications of the flexible printed circuit board 13 is easily caused, once one of the electrode bonding regions 112 is completed to be bonded to a non-corresponding flexibility. When the printed circuit board 13 is printed, not only the function of the OLED planar illumination device is disabled, but more serious, the internal OLED planar illumination device is electrically short-circuited and burned, instead of re-engaging the correctly corresponding flexible printed circuit board. 13 can remedy.

Accordingly, it is an object of the present invention to provide an OLED planar illumination device that can effectively reduce production costs and avoid mis-engagement of flexible printed circuit boards.

Therefore, the OLED planar illumination device of the present invention comprises a substrate, a first electrode unit, an organic light emitting film layer structure, a second electrode unit, at least two overlapping electrode groups, and at least two identical flexible printed circuit boards.

The substrate includes a mounting surface. The setting mask has a light emitting area and a peripheral area outside the light emitting area.

The first electrode unit covers the light emitting region.

The organic light emitting film layer structure is covered and electrically connected to the first electrode unit.

The second electrode unit is covered and electrically connected to the organic light emitting film layer.

The overlapping electrode groups are spaced apart from the peripheral region. Each of the overlapping electrode groups includes a plurality of overlapping electrodes that are spaced apart and electrically connected to one of the first electrode unit and the second electrode unit, respectively.

The flexible printed circuit boards are respectively attached to the overlapping electrode groups, and each flexible printed circuit board comprises a flexible substrate and a plurality of conductive lines spaced apart from the flexible substrate. The conductive lines each have a lap end. The overlapping ends are respectively achievable in a one-to-one manner by the overlapping electrodes.

Wherein, each of the overlapping electrodes overlaps the overlapping end of one of the conductive lines.

The effect of the present invention is to use a flexible printed circuit board of the same design specification, and each of the lap electrodes can be overlapped in a one-to-one manner on the overlapping end of the conductive line of the flexible printed circuit board, It is customary to design and manufacture flexible printed circuits of different specifications, thereby reducing production costs and avoiding the risk of mixing of flexible printed circuits.

2‧‧‧Substrate

21‧‧‧Setting surface

211‧‧‧Lighting area

212‧‧‧ surrounding area

3‧‧‧First electrode unit

31‧‧‧ patterned electrode layer

311‧‧‧Block electrodes

32‧‧‧ bus bar

4‧‧‧Organic luminescent layer structure

5‧‧‧Second electrode unit

6‧‧‧lap electrode group

61‧‧‧lap electrodes

62‧‧‧Virtual electrode

7‧‧‧Flexible printed circuit boards

71‧‧‧Flexible substrate

72‧‧‧Electrical circuit

721‧‧‧ lap end

X‧‧‧ first direction

Y‧‧‧second direction

The other features and advantages of the present invention will be apparent from the detailed description of the preferred embodiments of the invention, wherein: FIG. 1 is a schematic diagram illustrating a conventional OLED planar illumination device; FIG. 2 is a schematic diagram illustrating An embodiment of the OLED planar illumination device of the present invention; and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; Fig. 4 is a schematic view showing a different embodiment of the two overlapping electrode groups of the embodiment.

Referring to FIG. 2 and FIG. 3, an embodiment of the OLED planar illumination device of the present invention comprises a substrate 2, a first electrode unit 3, an organic light emitting film layer structure 4, a second electrode unit 5, and a second overlapping electrode group. 6, and two identical flexible printed circuit boards 7.

The substrate 2 includes a setting surface 21. The installation surface 21 has a light-emitting area 211 and a peripheral area 212 located outside the light-emitting area 211. The substrate 2 is selected from a flexible or non-flexible material, wherein the flexible material is made of a polymer material, and the polymer material may be selected from polyethylene terephthalate. Polycarbonate, polyacrylic acid, and combinations of the foregoing, the non-flexible material may be selected from the group consisting of glass, quartz, or acrylic sheets.

The first electrode unit 3 covers the light-emitting region 211 of the installation surface 21 of the substrate 2. The organic light emitting film layer structure 4 is covered and electrically connected to the first electrode unit 3. The second electrode unit 5 is a conductive film layer that is covered and electrically connected to the organic light-emitting film layer structure 4. The OLED layer 4 has a hole injection layer, a hole transfer layer, and a hole transfer layer from the first electrode unit 3 toward the second electrode unit 5 . An organic light emitting layer, an electron transfer layer, and an electron injection layer. Those skilled in the art are familiar with It is to be understood that the basic aspect of the organic light-emitting film layer structure 4 is as described above, and the detailed structure of the organic light-emitting film layer structure 4 is not the technical focus of the present invention, and will not be further described herein.

The first electrode unit 3 has a patterned electrode layer 31 and a plurality of bus bar lines 32. The patterned electrode layer 31 has a plurality of bulk electrodes 311. The bulk electrodes 311 are spaced apart from each other along a first direction X and a second direction Y substantially perpendicular to the first direction X and arranged in a matrix. The bus bars 32 extend parallel to the second direction and are disposed between the block electrodes 311 along the first direction X, and each of the bus bars 32 is connected to the plurality of block electrodes. It should be noted that the structural design of the patterned electrode layer 31, the number of the bus bars 32, and the connection relationship with the above two are not limited to the above, and may be changed according to different illumination function designs.

In the present embodiment, the first electrode unit 3 is used as an anode, and the second electrode unit 5 is used as a cathode. The patterned electrode layer 31 is composed of a transparent conductive material (for example, ITO), and the number of the bus bars 32 is two and each is made of a metal material having a high electrical conductivity and a working function. Composition. The second electrode unit may use a transparent conductive material or a highly conductive metal as needed.

The overlapping electrode groups 6 are spaced apart from the peripheral region 212 of the mounting surface 21 of the substrate 2. Each of the overlapping electrode groups 6 includes a plurality of spaced-apart lap electrodes 61. The lap electrodes 61 of the lap electrode groups 6 are electrically connected to one of the bus bars 32 in a one-to-one manner, but the remaining lap electrodes 61 of the lap electrode groups 6 are electrically connected. Second electrode unit 5. In this embodiment, the number of overlapping electrodes 61 of the overlapping electrode groups 6 is the same ten, and the arrangement between the overlapping electrodes 61 of the two is the same. Further, the area of each of the lap electrodes 61 is not less than 0.16 mm ² .

The flexible printed circuit boards 7 are respectively overlapped with the overlapping electrode groups 6, and each of the flexible printed circuit boards 7 includes a flexible substrate 71 and a plurality of conductive lines 72 spaced apart from the flexible substrate 71. . The conductive lines 72 each have a lap end 721. The overlapping end portions 721 are respectively overlapped to the overlapping electrodes 61 in a one-to-one manner.

Since the overlapping electrodes 61 of the overlapping electrode groups 6 are arranged in the same manner, the flexible printed circuit boards 7 can be made to use the flexible printed circuit boards 7 of the same design specifications, that is, the flexible printed circuit boards 7 The upper wire lines 71 are arranged and routed the same.

In addition, referring to FIG. 4, when the OLED planar illumination device is changed according to different illumination function designs, that is, when the number of the overlapping electrodes 61 of one or both of the overlapping electrode groups 6 is changed, that is, the above-mentioned The number of the lap electrodes 61 electrically connected to the first electrode unit 3 and the second electrode unit 5 is smaller than the number of the conductive lines 71 of the flexible printed circuit board 7, and the lap electrode group 6 is only One or more dummy pads 62 need to be added to make up, so that the overlapping electrodes 61 and the dummy electrodes 62 in the overlapping electrodes 6 can respectively overlap the respective flexible printed circuit boards 7 . The overlapping ends 721 of all of the conductive traces 72. Thereby, the flexible printed circuit boards 7 can also be used with flexible printed circuit boards of the same design specifications. It is additionally noted that the dummy electrode 62 described above is not electrically connected to any of the elements of the OLED planar illumination device.

In summary, the OLED planar illumination device of the present invention is The lap electrode 6 has the same arrangement of the lap electrodes 61, so that the flexible printed circuit board 7 of the same design specification can be used to solve the conventional need to design and manufacture the flexible printed circuit 7 of different specifications, thereby The production cost is reduced and the risk of mixing the flexible printed circuit 7 is avoided. In addition, when the number of the overlapping electrodes 61 of each of the overlapping electrode groups 6 is smaller than the number of the conductive lines 72 of the flexible printed circuit board 7, the dummy electrodes 62 can be added to supplement the conductive electrodes. The overlapping ends 721 of the line 72 are correspondingly overlapped, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

2‧‧‧Substrate

21‧‧‧Setting surface

211‧‧‧Lighting area

212‧‧‧ surrounding area

3‧‧‧First electrode unit

31‧‧‧ patterned electrode layer

311‧‧‧Block electrodes

32‧‧‧ bus bar

5‧‧‧Second electrode unit

6‧‧‧lap electrode group

61‧‧‧lap electrodes

7‧‧‧Flexible printed circuit boards

71‧‧‧Flexible substrate

72‧‧‧Electrical circuit

721‧‧‧ lap end

X‧‧‧ first direction

Y‧‧‧second direction

Claims (4)

An OLED planar illumination device comprising: a substrate comprising a setting surface, the setting mask having a light emitting area and a peripheral area outside the light emitting area; a first electrode unit covering the light emitting area; an organic light emitting a film structure, covered and electrically connected to the first electrode unit; a second electrode unit, covered and electrically connected to the organic light-emitting film layer structure; at least two overlapping electrode groups, spaced apart in the peripheral region, each The lap electrode group includes a plurality of lap electrodes that are spaced apart and electrically connected to one of the first electrode unit and the second electrode unit, respectively; and at least two identical flexible printed circuit boards respectively lapped to the laps An electrode assembly, and each flexible printed circuit board comprises a flexible substrate and a plurality of conductive lines spaced apart from the flexible substrate, the conductive lines respectively having a lap end, wherein the lap ends are respectively available for the electrodes The lap electrodes are overlapped in a one-to-one manner; wherein each lap electrode is overlapped with the lap end of one of the conductive lines. The OLED planar lighting device of claim 1, wherein the number of conductive lines of the flexible printed circuit boards is not less than the number of overlapping electrodes of each of the overlapping electrode groups. The OLED planar lighting device of claim 2, wherein the number of conductive lines of the flexible printed circuit boards is greater than the lapped power The number of the lap electrodes of the at least one of the pole groups, the lap electrode group further comprising at least one dummy electrode, such that the lap electrode of the lap electrode and the dummy electrode are matched to each other The overlapping ends of all conductive lines on the printed circuit board. The OLED planar illumination device of any one of claims 1 to 3, wherein the area of each of the lap electrodes is not less than 0.16 mm ² .