OLED module and OLED module lamp with reduced failure rate

Abstract

The present invention discloses an OLED module and an OLED module lamp with reduced failure, comprising an OLED panel, a flexible circuit board, a chip and an electronic component connected to the flexible circuit board, a groove is provided at the edge of the OLED panel, a flexible circuit board is covered on the groove, a corresponding pad is provided on the flexible circuit board, the chip is welded and connected to the pad, and the current flows into the OLED panel through the chip; the lamp comprises a plurality of OLED modules, and the plurality of OLED modules are connected in parallel or in a series-parallel combination mode, and when connected in parallel, a fuse is connected in series on each of the OLED modules. The present invention can maintain the consistency of constant current output and brightness without affecting the light and thin characteristics of the OLED panel. When a single-chip panel module is short-circuited or open-circuited in the OLED lamp, it does not affect the continued operation of other lamps, thereby reducing the failure probability of the OLED lamp.

Description

Technical Field

[0001] The present invention relates to the technical field of OLED lighting, and in particular to an OLED module and an OLED module lamp with reduced failure rate. Background Art

[0002] Organic electroluminescent devices (OLEDs) have attracted more and more attention from scholars and companies in the field of lighting and display due to their advantages such as energy saving, health, lightness, environmental protection, self-luminescence, short response time, simple structure and flexibility, and have broad development prospects.

[0003] The structure of an OLED device generally includes a substrate, two thin-film electrodes are made on the substrate, and multiple layers of organic thin films are made between the two electrodes. When power is applied between the two electrodes, the device will emit light. The most commonly used substrate is made of transparent glass. When the device is powered on, the light emitted by the device passes through the glass substrate and enters the air for display or lighting. These are called bottom-emitting devices. There are also some devices whose light is emitted from the device surface, which are called top-emitting devices.

[0004] OLED devices are currently used in two main areas: OLED lighting and OLED display. In OLED lighting, OLED devices are often processed into OLED panels of various sizes and patterns, and then each OLED panel is designed and processed to make an OLED panel module. Due to the characteristics of OLED lighting such as energy saving, health, environmental protection, and simple structure, OLED lighting panel modules are currently commonly used in table lamps, car lights, baby lights, wall lamps, etc. In these lighting applications, due to considerations of lighting structure design, brightness requirements or other factors, it is usually necessary to use several, dozens or even dozens of OLED panel modules in combination. This combination design requires that the brightness of the lamps must be consistent. Since the characteristic of OLED panels is that current density affects panel brightness, current drive is usually used to control the brightness of OLED panels and OLED modules.

[0005] Due to the current driving characteristics of OLED panels, in the current design of OLED lighting fixtures, there are usually two ways to combine and connect OLED panel modules: a series combination method and a parallel combination method.

[0006] There are two problems with the series combination: 1. When one of the panel modules is short-circuited, the entire OLED lamp will not light up; 2. The lamp requires an external constant current power supply.

[0007] The parallel combination method also has problems: when driven by voltage, due to the differences in products, the actual input current of each OLED panel is different, resulting in inconsistent brightness and failure to meet the use requirements of the lamp.

[0008] In summary, it is very difficult to solve the problem of series failure while keeping the brightness of the OLED panel consistent in OLED lamps.

[0009] In order to solve this problem, the current method in the industry is to drive each OLED module with a separate current so that each OLED panel can be controlled individually. Although this method can solve the above problems, the circuit is complicated. Lamps assembled with 5 OLED modules can still be selected. When a lamp has more than a dozen OLED modules, this solution cannot be implemented quickly. Summary of the invention

[0010] In order to solve the above problems, the present invention provides an OLED module, which enables the OLED module to generate a constant current internally, thereby meeting the requirement of the lamp for brightness consistency of the OLED panel and reducing the risk of failure of the OLED module and the lamp, while having a simple and feasible structure.

[0011] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0012] The present invention is an OLED module, comprising an OLED panel, a flexible circuit board, a chip and electronic components connected to the flexible circuit board. A groove is arranged at the edge of the OLED panel, the groove is covered with a flexible circuit board, a corresponding pad is arranged on the flexible circuit board, the chip is welded and connected to the pad, and current flows into the OLED panel through the chip.

[0013] A further improvement of the present invention is that the number of the grooves is 1-4, and the number of the flexible circuit boards corresponds to the number of the grooves.

[0014] A further improvement of the present invention is that a patterned conductive film is provided on the groove, and the conductive film at least leads out a group of positive and negative electrodes on the OLED panel.

[0015] A further improvement of the present invention is that the flexible circuit board is bound to the conductive film on the groove through ACF or ACP, wherein at least one of the flexible circuit boards has a positive electrode pad and a negative electrode pad for leading out the positive and negative electrodes on the OLED panel, and the distance between the positive electrode pad and the negative electrode pad is close to or equal to the length of the chip.

[0016] A further improvement of the present invention is that a heat sink is provided on the chip.

[0017] A further improvement of the present invention is that three pins are arranged on the chip, namely pins A, B and C, pin A is welded to connect the positive electrode of the pad and the positive input line, pin B is welded to connect the negative electrode of the pad, and pin C is welded to connect the negative input line of the pad.

[0018] A further improvement of the present invention is that the width of the chip is smaller than the width of the groove, and the height of the chip is lower than the depth of the groove.

[0019] An OLED module lamp with reduced failure rate of the present invention comprises a plurality of the above-mentioned OLED modules, wherein the plurality of OLED modules are connected in parallel or in a series-parallel combination. When connected in parallel, a fuse is connected in series to each OLED module.

[0020] The beneficial effects of the present invention are as follows: the OLED module lamp of the present invention, when the OLED panels are connected in parallel, the luminous brightness remains consistent, avoiding the risk of open-circuit failure of the OLED modules in series, and the current limiting chip of the OLED module, when the circuit voltage of the OLED panel fluctuates, the current limiting chip stabilizes the current output, so that the OLED panel is not affected by the fluctuation, and the groove structure is adopted, which does not affect the external dimensions of the OLED panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the OLED module of the present invention.

[0022] Figure 2 This is the electrode lead diagram of the OLED panel in Example 1 of the present invention

[0023] Figure 3 This is the module structure diagram in Example 1 of the present invention

[0024] Among them: 10-OLED panel, 20-FPC, 30-chip, 11-groove, 12-first cutting groove, 13-second cutting groove, 14-third cutting groove, 15-fourth cutting groove, 101-first anode lead-out area, 102-second anode lead-out area, 103-third anode lead-out area, 104-fourth anode lead-out area, 105-first cathode lead-out area, 106-second cathode lead-out area, 21-first circuit board, 22-second circuit board, 23-third circuit board, 24-fourth circuit board, 201-first positive electrode pad, 202-first negative electrode pad, 203-second positive electrode pad, 204-second negative electrode pad, 31-pin A, 32-pin B, 33-pin C. DETAILED DESCRIPTION

[0025] In order to enhance the understanding of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0026] like Figure 1-3As shown, the present invention is an OLED module, including an OLED panel 10 driven by current, a flexible circuit board 20, a chip 30 and electronic components connected to the flexible circuit board 20, a groove 11 is arranged at the edge of the OLED panel 10, the flexible circuit board 20 is covered on the groove 11, a corresponding pad is arranged on the flexible circuit board 20, the chip 30 is welded and connected to the pad, and the current flows into the OLED panel 10 through the chip 30. The substrate and back cover of the OLED panel 10 are made of glass. The groove 11 is processed by one or more processing methods such as laser cutting and diamond cutting. The groove is arranged around the OLED panel 10. The number of the grooves is at least one and can be four. A pattern is etched on the conductive film material on the groove 11. The positive and negative electrodes on the OLED panel can be led out through the pattern. The conductive film leads out at least one set of positive and negative electrodes on the OLED panel 10. The conductive film is made of ITO, MoAlMo or other conductive film materials. Three pins are arranged on the chip 30, namely, pin A31, pin B32 and pin C33. Pin A31 is welded to connect the positive electrode of the pad and the positive input line, pin B32 is welded to connect the negative electrode of the pad, and pin C33 is welded to connect the negative electrode of the pad. The width of the chip 30 is smaller than the width of the groove 11, and the height of the chip 30 is lower than the depth of the groove 11. A heat sink is arranged on the chip. The input voltage range of the chip is optional, and the output current is constant. According to the input current required by the OLED panel, a chip with corresponding parameters is selected. The chip 30 in the present invention can be used as a simple constant current device. Under voltage input conditions within a certain range, the current output to the OLED panel through the chip 30 is fixed, thereby ensuring that the brightness of the OLED lamp is consistent.

[0027] In the OLED lamp of the present invention, several OLED modules of the present invention can be connected in parallel or in a combination of series and parallel. When connected in parallel, a fuse is usually connected in series to each OLED module to prevent the entire lamp from failing when a single OLED module is short-circuited.

[0028] Example 1

[0029] The OLED panel is square, and a groove is arranged on each of the four sides of the OLED panel, and the four grooves are respectively a first groove 12, a second groove 13, a third groove 14 and a fourth groove 15. ITO electrode patterns for leading out electrodes of the OLED device are arranged in the four grooves, and the first groove 12 and the third groove 14 are symmetrical structures, and the second groove 13 and the fourth groove 15 are symmetrical structures. A first anode region 101 is arranged on the first groove 12, a third anode region 103 is arranged on the third groove 14, a second anode region 102 and a first cathode region 105 are arranged in the second groove 13, and a fourth anode region 104 and a second cathode region 106 are arranged in the fourth groove 15. The flexible circuit board is referred to as FPC. In this embodiment, there are four flexible circuit boards 20, namely a first circuit board 21, a second circuit board 22, a third circuit board 23 and a fourth circuit board 24. Corresponding to the first groove 12, the second groove 13, the third groove 14 and the fourth groove 15 respectively, the second circuit board 22 is provided with a first positive electrode pad 201 connected to the second anode area 102 and a first negative electrode pad 202 connected to the first cathode area 105; the fourth circuit board 24 is provided with a second positive electrode pad 203 connected to the fourth anode area 104 and a second negative electrode pad 204 connected to the second cathode area 106, the upper edges of the first circuit board 21 and the third circuit board 23 are connected to the first positive electrode pad 201 of the second circuit board 22 through a wiring, and the lower edges of the first circuit board 21 and the third circuit board 23 are connected to the second positive electrode pad 203 of the fourth circuit board 24 through a wiring, the second circuit board 22 and the fourth circuit board 24 are equivalent, and both can simultaneously lead out the positive and negative electrodes of the OLED device, and the chip can be selectively set on the second circuit board 22 or the fourth circuit board 24.

[0030] In this embodiment, the chip 30 is arranged on the fourth circuit board 24, the chip model is ADA GHHG1, the rated input voltage is 9-16V, and the output current is 260mA. Pin A31 of the chip 30 is connected to the second positive electrode pad 203, and pin B32 is welded to the second negative electrode pad 204. Pin A31 is also connected to the positive input line, and pin C33 is connected to the negative input line. After the OLED module is connected to the circuit, the current input is connected to the chip pin A, and the current output is connected to the pin C33 of the chip 30. When the voltage of the OLED module is controlled at 9-16V, the current flowing into the OLED panel after the chip processing is stabilized at 250mA, and the light is uniform and the brightness is consistent.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An OLED module, comprising an OLED panel (10), a flexible circuit board (20), a chip (30), and an electronic component connected to the flexible circuit board (20), characterized in that: A groove (11) is provided at the edge of the OLED panel (10), a flexible circuit board (20) is covered on the groove (11), a corresponding solder pad is provided on the flexible circuit board (20), the chip (30) is soldered and connected to the solder pad, and current flows into the OLED panel (10) through the chip (30); A heat sink is arranged on the chip (30); The chip (30) is provided with three pins, namely, pin A (31), pin B (32) and pin C (33); the pin A (31) is welded to connect the positive electrode of the pad and the positive input line; the pin B (32) is welded to connect the negative electrode of the pad; and the pin C (33) is welded to connect the negative input line of the pad; The width of the chip (30) is smaller than the width of the groove (11), and the height of the chip (30) is lower than the depth of the groove (11).

2. An OLED module according to claim 1, characterized in that: The number of the grooves (11) is 1-4, and the number of the flexible circuit boards (20) corresponds to the number of the grooves (11).

3. An OLED module according to claim 2, characterized in that: A conductive film formed into a pattern is arranged on the groove (11), and the conductive film at least leads out a group of positive and negative electrodes on the OLED panel (10).

4. An OLED module according to claim 3, characterized in that: The flexible circuit board (20) is bound to the conductive film on the groove (11) via ACF or ACP, wherein at least one of the flexible circuit boards (20) has a positive electrode pad and a negative electrode pad for leading out the positive and negative electrodes on the OLED panel (10), and the distance between the positive electrode pad and the negative electrode pad is close to or equal to the length of the chip (30).

5. An OLED module lamp with reduced failure rate comprising the OLED module according to any one of claims 1 to 4, characterized in that: The invention comprises a plurality of OLED modules, which are connected in parallel or in a combination of series and parallel. When connected in parallel, a fuse is connected in series on each of the OLED modules.

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