TW201347597A - Adjustable light organic LED plane lighting device - Google Patents

Abstract

An adjustable light organic LED plane lighting device is electrically connected to a switch unit, which includes a substrate, first electrode unit covers on the substrate covers the first electrode unit of the second electrode unit, and is interposed between the first, second electrode unit of the organic film structure. The first electrode unit contains a patterned electrode layer. A patterned electrode layer having a plurality of first, second strip electrodes respectively in the first direction from the substrate extends from the first side toward the second side portion, and the first, second linear electrode along a first direction substantially perpendicular to the second direction respectively in turn spacing are provided. The first, second strip electrodes along the second unequal direction has a pair of first, second width. Each of the first, second strip electrodes are respectively connected in parallel to the switch unit of a first switch and a second switch.

Description

Dimmable organic light emitting diode planar lighting device

The invention relates to an organic light emitting diode (OLED) planar illumination device, in particular to a dimmable organic light emitting diode planar illumination device.

Referring to FIG. 1, a conventional dimmable organic light emitting diode planar illumination device 1 is electrically connected to an external power supply circuit 10, which comprises: a transparent substrate 11 and a formation An anode layer (eg, ITO transparent conductive layer) 12 on the transparent substrate 11, an organic light-emitting film layer structure 13 formed on the anode layer 12, and a structure formed on the organic light-emitting film layer structure 13 A cathode layer 14, and a dimming circuit 15 electrically connected to the anode layer 12 and the cathode layer 14. The dimming circuit 15 is electrically connected to the power supply circuit 10.

The dimming circuit 15 achieves the desired brightness by transmitting a different voltage to the anode layer 12 and the cathode layer 14. As shown in FIG. 2, after obtaining different input voltages, the dimmable organic light-emitting diode planar illumination device 1 exhibits that its brightness is increased as the input voltage is increased. However, as can be seen from FIG. 3, the chrominance coordinates of the dimmable organic light-emitting diode planar illumination device 1 analyzed by a colorimeter at different input voltages show that the chrominance coordinates are from 3.5. The CIE 1931 (0.443, 0.422) of V is changed to CIE 1931 (0.458, 0.434) of 4.75 V; therefore, the dimmable organic light-emitting diode planar illumination device 1 can adjust the overall brightness of the illumination device, but A problem of light color shift has occurred. Furthermore, the dimming circuit 15 also causes an additional power loss to the dimmable organic light-emitting diode planar illumination device 1.

As can be seen from the above description, the problem that the organic light-emitting diode planar illumination device can improve the light color shift while adjusting the brightness of the light is a problem that needs to be improved by those skilled in the art.

Accordingly, it is an object of the present invention to provide a dimmable organic light emitting diode planar illumination device.

Another object of the present invention is to provide another dimmable organic light emitting diode planar illumination device.

Therefore, the dimmable organic light emitting diode planar illumination device of the present invention is electrically connected to a switching unit, and comprises: a substrate, a first electrode unit, a second electrode unit, and an organic light emitting film layer structure. The substrate has a first side portion and a second side portion disposed oppositely. The first electrode unit covers the substrate. The second electrode unit covers the first electrode unit. The organic light emitting film layer structure is interposed between the first electrode unit and the second electrode unit.

The one of the first electrode unit and the second electrode unit has a patterned electrode layer. The patterned electrode layer has a plurality of first strip electrodes and a plurality of second strip electrodes. The first strip electrodes and the second strip electrodes respectively extend from a first side portion adjacent to the second side portion toward the second side portion in a first direction, and the first strip electrodes and the first strip electrodes The two strip electrodes are arranged in a sequential interval along a second direction substantially perpendicular to the first direction. The first strip electrodes and the second strip electrodes respectively have a first width W ₁ and a second width W ₂ , W ₁ ≠W ₂ along the second direction, and the first strip electrodes Is a first switch connected to the switch unit, and the second strip electrodes are connected to a second switch of the switch unit.

In addition, another dimmable organic light emitting diode planar illumination device of the present invention comprises: a substrate, a first electrode unit, a second electrode unit, an organic light emitting film layer structure, and a switching unit. The substrate has a first side portion and a second side portion disposed oppositely. The first electrode unit covers the substrate. The second electrode unit covers the first electrode unit. The organic light emitting film layer structure is interposed between the first electrode unit and the second electrode unit. The switch unit has a first switch and a second switch.

Wherein, one of the first electrode unit and the second electrode unit has a patterned electrode layer, the patterned electrode layer has a plurality of first strip electrodes and a plurality of second strip electrodes, the first strips And the second strip electrodes extend from a first side portion adjacent to the substrate toward the second side portion in a first direction, and the first strip electrodes and the second strip electrodes are along a second direction substantially perpendicular to the first direction, which is respectively disposed in turn, wherein the first strip electrodes and the second strip electrodes respectively have a first width W ₁ and a along the second direction The second width W ₂ , W ₁ ≠ W ₂ , and the first strip electrodes are connected in parallel to the first switch, and the second strip electrodes are connected in parallel to the second switch.

The beneficial effect of the present invention is that each of the first strip electrodes and the second strip electrodes are respectively connected in parallel to the first switch and the second switch, and the corresponding input voltage can be fixed, and the switch is controlled. The unit achieves the purpose of changing the overall brightness of the light and avoids the problem of light color shift.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 4 and FIG. 5, a first preferred embodiment of the dimmable organic light-emitting diode planar illumination device of the present invention comprises: a substrate 2, a first electrode unit 3, a second electrode unit 4, and a The organic light-emitting film layer structure 5, and a switching unit 6. The switch unit 6 is electrically connected to an external power supply circuit 8 to provide an input voltage to the switch unit 6 through the power supply circuit 8.

The substrate 2 is a light transmissive substrate and has a first side portion 21 and a second side portion 22 disposed oppositely. The first electrode unit 3 covers the substrate 2. The second electrode unit 4 covers the first electrode unit 3. The organic light emitting film layer structure 5 is interposed between the first electrode unit 3 and the second electrode unit 4. The switch unit 6 has a first switch 61 and a second switch 62. In the first preferred embodiment of the present invention, the switch unit 6 is a flexible printed circuit board (FPCB) bonded to the first electrode unit 3. The flexible printed circuit board is internally provided with the first switch 61 and the second switch 62, and the first switch 61 and the second switch 62 are connected in parallel to the power supply circuit 8. The organic light-emitting film layer structure 5 has a hole injection layer, a hole transfer layer, and a hole in a direction from the first electrode unit 3 toward the second electrode unit 4. An organic light emitting layer, an electron transfer layer, and an electron injection layer. As is well known to those skilled in the art, the basic aspect of the organic light-emitting film layer structure 5 is as described above, and the detailed structure of the organic light-emitting film layer structure 5 is not the technical focus of the present invention. More details.

The first electrode unit 3 has a patterned electrode layer 30, a first bus bar line 31 and a second bus bar line 32. In the first preferred embodiment of the present invention, the patterned electrode layer 30 is formed of a transparent conductive material (eg, ITO), and the first bus bar line 31 and the second bus bar line 32 are respectively It consists of a metal material with high electrical conductivity and working function. The patterned electrode layer 30 has a plurality of first strip electrodes 301 and a plurality of second strip electrodes 302. The first strip electrodes 301 and the second strip electrodes 302 extend in a first direction Y from the first side portion 21 adjacent to the substrate 2 toward the second side portion 22, and the first The strip electrodes 301 and the second strip electrodes 302 are sequentially spaced apart in a second direction X substantially perpendicular to the first direction Y. The first strip electrodes 301 and the second strip electrodes 302 respectively have a first width W ₁ and a second width W ₂ along the second direction X; wherein W ₁ <W ₂ .

The first bus bar 31 is disposed on the first side portion 21 of the substrate 2 and connected to the first strip electrodes 301, and one end portion of the first bus bar line 31 is electrically connected to the first switch 61. So that the first strip electrodes 301 are connected in parallel to the first switch 61.

The second bus bar 32 is disposed on the second side portion 22 of the substrate 2 and connected to the second strip electrodes 302, and one end portion of the second bus bar 32 is electrically connected to the second switch 62. So that the second strip electrodes 302 are connected in parallel to the second switch 62.

In the first preferred embodiment of the present invention, a length of each of the first strip electrodes 301 and each of the second strip electrodes 302 along the first direction Y is 100 mm, respectively, and W ₁ and W ₂ respectively It is 40 μm and 60 μm, that is, W ₁ :W ₂ is equal to 2:3.

When the first switch 61 and the second switch 62 are both open (refer to Table 1. below), and the power supply circuit 8 supplies the input voltage to the first bus bar 31 and the second bus bar 32, When the input voltage is transmitted to each of the first strip electrodes 301 and the second strip electrodes 302, the brightness of the first preferred embodiment of the present invention is 100%.

It should be noted that the first strip electrodes 301 and the second strip electrodes 302 of the first preferred embodiment of the present invention are respectively connected in parallel to the first bus bar line 31 and the second bus bar. a cable 32, and the first bus bar 31 and the second bus bar 32 are also connected in parallel to the power supply circuit 8; therefore, when the first switch 61 and the second switch 62 are respectively turned on and off, and When the power supply circuit 8 supplies the input voltage to the first bus bar 31 and the second bus bar 32, each of the first strip electrodes 301 is in an equipotential state, thereby making the first preferred embodiment of the present invention The brightness of the example is 40%. As can be seen from the foregoing description, the first preferred embodiment of the present invention is a "four-stage adjustment" dimmable light-emitting diode planar illumination device that utilizes each of the first strip electrodes 301 and each of the second strip electrodes. The concept of the first switch 61 and the second switch 62 are respectively connected in parallel to fix the input voltage corresponding to each of the first strip electrodes 301 and the second strip electrodes 302, and the switch unit 6 is controlled. Achieve the purpose of changing the overall brightness of the light, and avoid the problem of light color shift.

Referring to FIG. 6 and FIG. 7, a second preferred embodiment of the dimmable organic light emitting diode planar illumination device of the present invention is substantially the same as the first preferred embodiment, and the difference is that the first The second preferred embodiment further includes a patterned insulating layer 7; the patterned electrode layer 30 further has a plurality of third strip electrodes 303; the first electrode unit 3 further has a first bus bar 33 and a second The bus bar 34, a third bus bar 35 and a plurality of inner connecting wires 36; and the switch unit 6 further has a third switch 63. In the third preferred embodiment of the present invention, the first switch 61, the second switch 62 and the third switch 63 are connected in parallel to the power supply circuit 8.

The third strip electrodes 303 extend from the first side portion 21 adjacent to the substrate 2 toward the second side portion 22 along the first direction Y, and the first strip electrodes 301 and the second strips The third electrode 302 and the third strip electrodes 303 are arranged alternately in the second direction X. The third strip electrodes 303 have a third width W ₃ , W ₁ ≠ W ₂ ≠ W ₃ along the second direction X; wherein W ₁ < W ₂ < W ₃ .

The patterned insulating layer 7 is interposed between the first electrode unit 3 and the organic light-emitting film layer structure 5, and the patterned electrode layer 30 and the organic light-emitting film layer structure 5 are in contact with each other. The first bus bar 33, the second bus bar 34, and the third bus bar 35 are respectively spaced apart from the second side portion 22 of the substrate 2 and extend along the second direction X, respectively. The two ends of the inner connecting wires 36 are respectively penetrated through the patterned insulating layer 7 to respectively connect the first strip electrodes 301 and the first bus bar lines 33 (as shown in FIG. 7 and FIG. 8 ). a second strip electrode 302 and the second bus bar line 34 (shown in Figures 7 and 9), and each of the third strip electrode 303 and the third bus bar line 35 (as shown in Figures 7 and 10) The first bus bar 33, the second bus bar 34, and one end of the third bus bar 35 are electrically connected to the first switch 61, the second switch 62, and the third switch, respectively. 63, such that the first strip electrodes 301, the second strip electrodes 302, and the third strip electrodes 303 are respectively connected in parallel to the first switch 61, the second switch 62, and the third Switch 63.

In the second preferred embodiment of the present invention, each of the first strip electrodes 301, each of the second strip electrodes 302, and each of the third strip electrodes 303 has a length along the first direction Y of 100. Mm, and W ₁ , W ₂ and W ₃ are 30 μm, 60 μm and 110 μm, respectively, that is, W ₁ :W ₂ :W ₃ is equal to 3:6:11.

The concept of the second preferred embodiment of the present invention in adjusting its brightness is the same as the first preferred embodiment. For example (refer to the following Table 2.), when the first switch 61, the second switch 62 and the third switch 63 are respectively in an open, open and closed state, and the power supply circuit 8 provides the input voltage When the first bus bar line 31, the second bus bar line 32, and the third bus bar line 33 are given, each of the first strip electrodes 301 and each of the second strip electrodes 302 are in an equipotential state, thereby The brightness of the third preferred embodiment of the invention is 45%. As can be seen from the foregoing description, the second preferred embodiment of the present invention is an "eight-stage adjustment" dimmable light-emitting diode planar illumination device that utilizes each of the first strip electrodes 301 and each of the second strip electrodes. 302 and each of the third strip electrodes 303 are respectively connected to the first switch 61, the second switch 62 and the third switch 63 to fix the first strip electrodes 301 and the second strip electrodes 302 and The input voltage corresponding to each of the third strip electrodes 303 is controlled by the switch unit 6 to achieve the purpose of changing the overall luminance, and avoids the problem of light color shift.

In summary, the dimmable organic light-emitting diode planar illumination device of the present invention uses each of the first strip electrodes 301, each of the second strip electrodes 302, and each of the third strip electrodes 303 to be respectively connected to the first switch. 61. The second switch 62 and the third switch 63 are configured to fix an input voltage corresponding to each of the first strip electrodes 301, each of the second strip electrodes 302, and each of the third strip electrodes 303. The purpose of the present invention is achieved by controlling the switching unit 6 to achieve the purpose of changing the overall luminance of the light and avoiding the problem of light color shift.

The above is only the preferred embodiment and the specific examples of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent change according to the scope of the invention and the description of the invention. And modifications are still within the scope of the invention patent.

2. . . Substrate

twenty one. . . First side

twenty two. . . Second side

3. . . First electrode unit

30. . . Patterned electrode layer

301. . . First strip electrode

302. . . Second strip electrode

303. . . Third strip electrode

31. . . First bus line

32. . . Second bus line

33. . . First bus line

34. . . Second bus line

35. . . Third bus line

36. . . Inner connecting wire

4. . . Second electrode unit

5. . . Organic luminescent film layer structure

6. . . Switch unit

61. . . First switch

62. . . Second switch

63. . . Third switch

7. . . Patterned insulation

8. . . Power supply circuit

X. . . First direction

Y. . . Second direction

W ₁ . . . First width

W ₂ . . . Second width

W ₃ . . . Third width

1 is a front elevational view showing a conventional dimmable organic light emitting diode planar illumination device;

2 is a luminance versus voltage graph illustrating the brightness of the dimmable organic light emitting diode planar illumination device;

3 is a CIE chromaticity coordinate value versus voltage graph illustrating the problem of color shifting of the dimmable organic light emitting diode;

4 is a front elevational view showing a first preferred embodiment of the dimmable organic light emitting diode planar illumination device of the present invention;

5 is a top plan view showing a detailed structure of a first electrode unit and a connection relationship between the first electrode unit and a switch unit according to the first preferred embodiment of the present invention;

6 is a front elevational view showing a second preferred embodiment of the dimmable organic light emitting diode planar illumination device of the present invention;

FIG. 7 is a top plan view showing a detailed structure of a first electrode unit covered by a patterned insulating layer, and a connection relationship between the first electrode unit and a switching unit;

Figure 8 is a side cross-sectional view taken along line VIII-VIII of Figure 7, illustrating the electrical connection between a first strip electrode and a first bus bar of the second preferred embodiment of the present invention;

Figure 9 is a side cross-sectional view taken along line IX-IX of Figure 7, illustrating the electrical connection between a second strip electrode and a second bus bar of the second preferred embodiment of the present invention;

Figure 10 is a side cross-sectional view taken on line X-X of Figure 7, illustrating the electrical connection between a third strip electrode and a third bus bar of the second preferred embodiment of the present invention.

2. . . Substrate

twenty one. . . First side

twenty two. . . Second side

3. . . First electrode unit

30. . . Patterned electrode layer

301. . . First strip electrode

302. . . Second strip electrode

31. . . First bus line

32. . . Second bus line

6. . . Switch unit

61. . . First switch

62. . . Second switch

8. . . Power supply circuit

X. . . First direction

Y. . . Second direction

Claims (12)

A dimmable organic light emitting diode planar illumination device is electrically connected to a switch unit, comprising: a substrate having a first side portion and a second side portion disposed oppositely; a first electrode unit covering a second electrode unit covering the first electrode unit; and an organic light emitting film layer structure interposed between the first electrode unit and the second electrode unit; wherein the first electrode unit and the first electrode unit One of the second electrode units has a patterned electrode layer having a plurality of first strip electrodes and a plurality of second strip electrodes, the first strip electrodes and the second strips The electrodes extend from a first side portion adjacent to the substrate toward the second side portion along a first direction, and the first strip electrodes and the second strip electrodes are substantially perpendicular to the first direction The first strip electrodes and the second strip electrodes respectively have a first width W ₁ and a second width W ₂ , W ₁ in the second direction. ≠ W _2, and such is the first stripe electrode and A first switch to the switching unit, such second strip electrode is connected in parallel to a second switch of the switch unit. The dimmable organic light-emitting diode planar illumination device of claim 1, wherein the first electrode unit has the patterned electrode layer, and the patterned electrode layer is composed of a transparent conductive material. ;W ₁ <W ₂ . The dimmable organic light-emitting diode planar lighting device of claim 2, wherein the first electrode unit further has a first bus bar and a second bus bar, the first bus bar a wire is disposed on the first side of the substrate and connected to the first strip electrodes, and one end of the first bus bar is electrically connected to the first switch, so that the first strip electrodes are connected in parallel The first switch, the second bus bar is disposed on the second side of the substrate and connected to the second strip electrodes, and one end of the second bus bar is electrically connected to the second switch to The second strip electrodes are connected in parallel to the second switch. The dimmable organic light emitting diode planar illumination device of claim 2, wherein the patterned electrode layer further has a plurality of third strip electrodes, wherein the third strip electrodes are respectively The first direction extends from the first side portion adjacent to the substrate toward the second side portion, and the first strip electrodes, the second strip electrodes, and the third strip electrodes are along the second direction, respectively Arranging in sequence, the third strip electrodes have a third width W ₃ , W ₁ ≠W ₂ ≠W ₃ along the second direction, and the third strip electrodes are connected in parallel to the switch unit A third switch. A dimmable organic light-emitting diode planar lighting device according to claim 4, wherein W ₁ &lt; W ₂ &lt; W ₃ . The dimmable organic light-emitting diode planar illumination device of claim 4, further comprising a patterned insulating layer, wherein the first electrode unit further has a first bus bar and a second bus bar a line, a third bus bar and a plurality of inner connecting wires; the patterned insulating layer is sandwiched between the first electrode unit and the organic light emitting film layer structure, and the patterned electrode layer and the organic light emitting film layer The first bus bar, the second bus bar, and the third bus bar are respectively disposed at intervals on the second side of the substrate and extend along the second direction, respectively. The two ends of the inner connecting wires respectively penetrate the patterned insulating layer to respectively connect the first strip electrodes and the first bus bar lines, the second strip electrodes and the second bus bar lines, and the first a third strip electrode and the third bus bar line; the first bus bar line, the second bus bar line and one end portion of the third bus bar line are electrically connected to the first switch and the second switch respectively And the third switch to make the first The strip electrodes, the second strip electrodes and the third strip electrodes are respectively connected in parallel to the first switch, the second switch and the third switch. A dimmable organic light emitting diode planar illumination device comprising: a substrate having a first side portion and a second side portion disposed oppositely; a first electrode unit covering the substrate; and a second electrode unit Covering the first electrode unit; an organic light-emitting film layer structure sandwiched between the first electrode unit and the second electrode unit; and a switch unit having a first switch and a second switch; One of the first electrode unit and the second electrode unit has a patterned electrode layer, the patterned electrode layer has a plurality of first strip electrodes and a plurality of second strip electrodes, and the first strip electrodes And the second strip electrodes are respectively extended from a first side portion adjacent to the substrate toward the second side portion along a first direction, and the first strip electrodes and the second strip electrodes are along a substantial The first strip electrodes and the second strip electrodes respectively have a first width W ₁ and a second direction along the second direction, respectively, in a second direction perpendicular to the first direction. a width _{W 2, W 1 ≠ W 2} , and the The first electrode is a strip parallel to the first switch, the second such strip electrodes is connected in parallel to the second switch. The dimmable organic light-emitting diode planar illumination device of claim 7, wherein the first electrode unit has the patterned electrode layer, and the patterned electrode layer is composed of a transparent conductive material. ;W ₁ <W ₂ . The dimmable organic light emitting diode planar lighting device of claim 8, wherein the first electrode unit further has a first bus bar line and a second bus bar line, and the first bus bar line Provided on the first side of the substrate and connected to the first strip electrodes, one end of the first bus bar is electrically connected to the first switch, so that the first strip electrodes are connected in parallel to the first strip electrode a first switch, the second bus bar is disposed on the second side of the substrate and connected to the second strip electrodes, and one end of the second bus bar is electrically connected to the second switch, so that The second strip electrodes are connected in parallel to the second switch. The dimmable organic light-emitting diode planar illumination device of claim 8, wherein the patterned electrode layer further has a plurality of third strip electrodes, and the switch unit further has a third switch. The third strip electrodes extend from the first side portion adjacent to the substrate toward the second side portion along the first direction, and the first strip electrodes, the second strip electrodes and the first portion The three strip electrodes are respectively disposed in the second direction along the second direction, and the third strip electrodes have a third width W ₃ , W ₁ ≠W ₂ ≠W ₃ along the second direction, and the same The three strip electrodes are connected in parallel to the third switch. A dimmable organic light-emitting diode planar lighting device according to claim 10, wherein W ₁ &lt; W ₂ &lt; W ₃ . The dimmable organic light emitting diode planar illumination device according to claim 10, further comprising a patterned insulating layer, wherein the first electrode unit further has a first bus bar line and a second bus bar line a third bus bar and a plurality of inner connecting wires; the patterned insulating layer is sandwiched between the first electrode unit and the organic light emitting film layer structure, and the patterned electrode layer and the organic light emitting film layer structure Contacting each other; the first bus bar, the second bus bar, and the third bus bar are respectively disposed at intervals on the second side of the substrate and extend in the second direction, respectively The two ends of the connecting wire are respectively penetrated through the patterned insulating layer to respectively connect the first strip electrodes and the first bus bar line, the second strip electrodes and the second bus bar line, and each third a strip electrode and the third bus bar; the first bus bar, the second bus bar, and one end of the third bus bar are electrically connected to the first switch, the second switch, and The third switch to make the first Electrodes, such second strip electrode with such third strip electrodes, respectively connected in parallel to the first switch, the second switch and the third switch.