TWI398794B - An electrical device with pleds - Google Patents

Abstract

An electrical device with PLEDs comprises a electrical device, a PLED module and a control module. The PLED module position in a housing of the electrical device. When the PLED module emittes, the light of the PLED module exposed through a plurality of light-pervious zones form on the housing of the electrical device. Due to the characteristics of flexible and printable, the application filed of the the PLED module wider then conventional OLED and more facility to manufacture. Furthermore, compare with the conventional OLED, a light-guide plate can be omitted because of the planer-light-source characteristic of the PLED module.

Description

Electronic device with polymer light-emitting diode

The present invention relates to an electronic device having a light-emitting diode, and more particularly to an electronic device using a polymer light-emitting diode as a backlight.

As disclosed in Taiwan Patent No. M317029, it is a keyboard with a backlight function, which is provided with a plurality of light-emitting diodes (LEDs) on the keyboard, and the light source provided by the light-emitting diodes can be easily used by the user. Identify the location of each keycap on the keyboard. However, since the LED itself is a point light source, if it is not processed, it is easy to cause a problem of uneven brightness. In order to enable the light source of the LED to be evenly distributed, the conventional illuminating keyboard uses the light guiding element to appropriately disperse the light source of the LED (for example, the above case is to add a light guide plate). However, in addition to increasing the cost of the light guiding element, when the light passes through the light guiding element, the light intensity is likely to be attenuated due to problems such as light intensity degradation, or the light is still not effectively distributed even when the light guiding element is poorly fabricated. .

In addition, as disclosed in Taiwan Patent No. M335734, it is an illuminated keyboard using OLED as a keyboard backlight. Although the OLED has the characteristics of a surface light source, the arrangement of the light guiding element can be omitted, but due to the OLED system. It is a semiconductor process and the process is complicated.

In addition, in today's general electronic devices, such as notebook computers, the outer casing is decorated with the texture and characteristics of the pattern, the pattern or the material itself, and if the decoration of the electronic device casing is set to a dynamic manner, Its decorative ability is more vivid, and it can also increase the added value of electronic products.

Therefore, in order to solve the aforementioned problems, the present invention provides an electronic device using a polymerizable light-emitting diode (PLED) of a printable process as a backlight and a method of manufacturing the same.

The method for manufacturing an electronic device having a polymer light-emitting diode according to the present invention comprises the following steps:

Step A: forming an electrode group and a plurality of polymer light-emitting units on a film substrate by printing means to fabricate a polymer light-emitting diode module having a plurality of polymer light-emitting diodes unit.

Step B: covering an electronic device housing of the plurality of transparent regions to the polymer light emitting diode module, so that the polymer light emitting units respectively correspond to the light transmitting regions of the outer casing.

Preferably, in the step A, a plurality of polymer light-emitting units of a predetermined color are formed on the film substrate by a printing means.

Preferably, in the step A, the electrode group may be a conductive line printed on the film substrate or an anode or a cathode of the polymer light-emitting unit.

The electronic device having the polymer light emitting diode of the present invention comprises an electronic device and a polymer light emitting diode module. The electronic device includes a casing and an electronic component module disposed in the casing, and the casing has a plurality of light transmitting regions. The polymer light-emitting diode module comprises a flexible film substrate and a plurality of polymer light-emitting units disposed on the film substrate, wherein the outer casing of the electronic device covers the polymer light-emitting diode module And the polymer light-emitting units respectively correspond to the light-transmitting regions.

The electronic device of the present invention may be a keyboard or a notebook computer. When the electronic device is a keyboard, the referenced outer casing is a key cap of the keyboard. When the electronic device is a notebook computer, the referenced outer casing is the notebook type. The back panel of the computer's screen.

Since the polymer light-emitting diode module has the characteristics of a surface light source, the arrangement of the light guiding element can be omitted and the cost can be saved compared with the conventional method of using the conventional LED as a backlight. Compared with the OLED of the conductor process as the backlight of the electronic device, since the polymer light-emitting diode module can be manufactured by printing, and the film substrate has flexibility, it has simple manufacturing and low cost. And the advantages of a wider application level.

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.

Referring to FIG. 1 , FIG. 3 and FIG. 4 , a first preferred embodiment of an electronic device having a polymer light emitting diode includes an electronic device, a polymer light emitting diode module 2 and a control module. 3.

Referring to FIG. 2, a preferred embodiment of the method for fabricating an electronic device having a polymer light-emitting diode according to the present invention comprises the following steps:

Step 51: A plurality of transparent areas are disposed on the outer casing of the electronic device. The electronic device 1 includes a casing 11 and an electronic component module 112 disposed inside the casing 11, and the casing 11 has a plurality of light transmitting regions 111.

In the embodiment, if the electronic device 1 is a keyboard, the device further includes a base 13 , a plurality of key caps disposed on the base 13 , a circuit board and a support piece 14 , and the support piece 14 has a plurality of supports for supporting The support portion 141 of the key caps. In the first preferred embodiment, the so-called outer casing 11 can be a plurality of keycaps of the keyboard, and the so-called electronic component module 112 is a circuit board within the keyboard. Among them, the so-called light-transmissive area 111 on the outer casing 11 is an outer contour which is located on each of the keycaps and which is one of a number, a phonetic symbol, a character, a figure, and a symbol. In other words, the light-transmitting region 111 of the present embodiment is formed by setting a number, a phonetic symbol, a character, a figure, or a symbol disposed on the keycap to represent the function of the keycap to be permeable to light, but not For this reason, the light-transmitting region 111 may also be formed in a form in which a partial region of the key cap is disposed to be transparent or partially transparent.

Step 52: Providing a polymer light emitting diode module 2.

In the present embodiment, the polymer light-emitting diode module 2 has a film substrate 21, a plurality of polymer light-emitting units 22 disposed on the film substrate 21, and conductive lines electrically connected to the polymer light-emitting units 22. twenty three. Each of the polymer light-emitting units 22 has an anode (not shown), a light-emitting polymer layer (not shown), and a cathode (cathode) disposed on the film substrate 21 in sequence. The figure is not shown, a hole transport layer between the anode and the polymer light-emitting layer, and an electron transport layer between the polymer light-emitting layer and the cathode. The material of the anode is translucent indium tin oxide (ITO), which is usually formed on the film substrate 21 by etching or printing, and the polymer light emitting layer may be One of the methods of screen printing, in-jet printing, and coating is provided on the anode (or the hole transport layer). The detailed process method and structure of the polymer light-emitting diode module 2 are prior art and are not described here.

Step 53: The polymer light-emitting diode module is disposed inside the outer casing of the electronic device.

As shown in FIG. 1, in order to illuminate the numbers, phonetic symbols, characters, figures or symbols represented by the light-transmitting area 111 on the keycap, the polymer light-emitting diode module 2 is used as a backlight of the keyboard. However, in order to support the pressed state of the keycap and the identification button, the support piece 14 and the circuit board are provided under the keycap. However, this will cause the light of the polymer light-emitting diode module 2 to be shielded or partially shielded by the support sheet 14 and the circuit board, and it is difficult to reach the light-transmitting region 111 on the key cap. Therefore, the circuit board and the supporting sheet 14 are preferably made of a light transmissive material, so that the light of the polymer light emitting unit 22 can pass through the supporting sheet 14 and the circuit board, and the light transmitting area 111 on the key cap is sufficiently transmitted. In addition, in other implementations, the position of the polymer light-emitting diode module 2 may also be disposed between the circuit board and the support sheet 14, and the key caps are disposed above the circuit board, or The position of the polymer light-emitting diode module 2 may also be between the key cap and the circuit board, and the support piece 14 is located below the circuit board. Of course, in the latter embodiment, the film substrate 21 of the polymer light-emitting diode module 2 needs to be provided with an opening through which the support portion 141 of the lower support piece 14 passes (not shown). .

In this embodiment, since the polymer light-emitting diode module 2 is used as a backlight of the keyboard, the arrangement positions of the polymer light-emitting units 22 can be arranged corresponding to the keycap positions of the keyboard to be set. The numbers, phonetic symbols, characters, figures or symbols represented by the light-transmissive area 111 on the keycap are illuminated, and the user is clearly observed the function of each key.

It is to be noted that, since the polymer light-emitting diode module 2 of the present embodiment is used as a backlight of a keyboard, when the polymer light-emitting units 22 are formed, polymer light-emitting materials of different colors can be used. Printing different color luminescent materials on different button regions of the film substrate 21 by using different stencils or other means, and covering an electronic device casing with a plurality of transparent regions to cover the polymer light-emitting diode module. The polymer light-emitting units 22 are arranged to correspond to key areas of different functions of the keyboard, so that when the polymer light-emitting units 22 are illuminated, the user can easily distinguish different key type areas according to different colors. Of course, the polymer light-emitting units 22 may be printed with a polymer light-emitting material of the same color.

Step 54: Set a control module on the electronic device. In this embodiment, in order to control the overall brightening effect of the polymer light-emitting diode module 2, the control signal can be transmitted to the polymer light-emitting diode module 2 via the conductive line 23 through the control module 3 to control the polymer light-emitting. A specific number of the plurality of polymer light-emitting units 22 in the diode module 2 emit light and do not emit light. The control module 3 is electrically connected to the anode and cathode of the plurality of polymer light-emitting units 22 through the conductive line 23, and transmits a control signal between the control module 3 and the plurality of polymer light-emitting units 22.

The control module 3 includes a power supply 31, a controller 32, and a drive assembly 33. In this embodiment, the controller 32 is a microcontroller (MCU) disposed on the keyboard circuit board, and the driving component 33 is a general purpose input/output (General Purpose I/O, GPIO) disposed on the circuit board. .

The control module 3 can control the polymer light-emitting diode module 2 by, for example, when the Shift button is pressed, the MCU additionally transmits a signal to the controller 32, so that the controller 32 is further illuminated by the driving component 33. The polymer light-emitting unit 22 under the Shift keycap, thereby prompting the user that the Shift button is actually pressed.

In addition, the controller 32 can also selectively illuminate or not illuminate the polymer light-emitting unit 22 at a specific position to provide a variably brightened keyboard. For example, when the Shift button is pressed, the controller 32 first illuminates the polymer light emitting unit 22 under the Shift keycap through the driving unit 33, and then lights up the polymer light emitting unit 22 under the key cap around the Shift key.

As described above, since the polymer light-emitting unit 22 itself has a high-uniformity of the surface light source characteristics, when the polymer light-emitting unit 22 is used as the backlight of the keyboard, even if the light guiding element is not provided, there is no uniform light distribution. Problems such as unevenness or attenuation of light intensity, of course, the uniformity of the overall light is not limited by the manufacturing quality of the light guiding element.

Referring to Figures 5 to 7, a second preferred embodiment of an electronic device 1' having a polymer light-emitting diode according to the present invention is shown. In the second preferred embodiment, the electronic device 1' is a notebook computer, and further includes a main body 41 and a screen body 42 connected to the main body 41, and the screen body 42 has a display panel and a backboard. . In the second preferred embodiment, the outer casing 11' of the electronic device 1' is the back panel of the screen body 42, and the so-called electronic component module 112' is the display panel of the screen body 42. In this embodiment, the polymer light-emitting diode module 2' is disposed on the inner side of the back panel facing the display panel, and the so-called light-transmitting region 111' is a perforation disposed in the back panel in the second preferred embodiment. In other words, when the polymer light-emitting diode module 2' is disposed inside the backplane, the polymer light-emitting units 22' of the polymer light-emitting diode module 2' respectively correspond to the light-transmitting regions 111', so that When the polymer light-emitting units 22' emit light, the light rays can be emitted from the light-transmitting regions 111', respectively.

In order to protect the polymer light-emitting diode module 2', a transparent lens may be disposed on the perforations belonging to the light-transmitting region 111' to prevent dust or moisture from entering the inside of the casing 11' via the perforations.

In addition, in the second preferred embodiment, the driving component 33' of the control module 3' can be a driver IC, and the controller 32 can also carry the polymer. Various driving sequence modes of the light emitting unit 22'. In other words, through the driving component 33', the polymer light emitting units 22' on the polymer light emitting diode module 2' can be controlled to emit light or not in accordance with the driving sequence in the controller 32'. The polymer light-emitting units 22 ′ on the inner side of the board display different light-emitting changes by the control of the control module 3 ′ (for example, the polymer light-emitting units 22 ′ are collectively illuminated in a marquee or wave manner. And so on) with a dynamic decoration effect. Further, in the present embodiment, the plurality of polymer light-emitting units 22' of the polymer light-emitting diode module 2' can be provided in a pattern outline, a character outline, or a combination of a figure and a character, thereby increasing the diversity of display.

Since the manufacturing method of the second preferred embodiment of the present invention is substantially the same as that of the previous preferred embodiment, the description thereof will not be repeated.

In addition, since the film substrates 21 and 21 ′ of the polymer light-emitting diode modules 2 and 2 ′ themselves have flexibility and can be deformed with the surface provided thereto, the polymer light is emitted during application. The diode modules 2, 2' can also be combined with electronic devices having a curved or irregular shape of the outer casing structure, and have a wider application level than the OLEDs generally using glass as a substrate.

In summary, the present invention provides the polymer light-emitting diode modules 2, 2' as the backlight thereof by the polymer light-emitting diode modules 2, 2', because the polymer light-emitting diode modules 2, 2' themselves That is to say, it has the characteristics of a surface light source, so that compared with the conventional method of using a conventional LED as a light source, the arrangement of the light guiding element can be omitted and the cost can be saved. Moreover, compared with the conventional method of using OLED as a backlight of an electronic device, The polymer light-emitting diode modules 2, 2' can be manufactured by printing, and the film substrate has flexibility, so that the manufacturing is simple, the cost is low, and the application level is wide, and further, through the control The control of the modules 3, 3' can also make the polymer light-emitting diode modules 2, 2' have more vivid and more varied illumination changes, thereby increasing the added value of the electronic products, so that the invention can be achieved. purpose.

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

1, 1’. . . Electronic device

2, 2’. . . Polymer light-emitting diode module

3, 3’. . . Control module

31. . . Power Supplier

32. . . Controller

33, 33’. . . Drive component

11. . . shell

111. . . Light transmission area

112. . . Electronic component module

112’. . . Electronic component module

13. . . Base

14. . . Support piece

141. . . Support

21, 21’. . . Film substrate

22, 22’. . . Polymer light-emitting unit

twenty three. . . Conductive line

41. . . Host body

42. . . Screen body

51~54. . . step

1 is an exploded view of a first preferred embodiment of an electronic device having a polymer light-emitting diode according to the present invention;

2 is a flow chart showing the steps of a first preferred embodiment of a method for fabricating an electronic device having a polymer light-emitting diode according to the present invention;

3 is a plan view showing a polymer light emitting diode module in a first preferred embodiment of an electronic device having a polymer light emitting diode according to the present invention;

4 is a schematic diagram showing a connection between a polymer light-emitting diode module and a control module in a first preferred embodiment of an electronic device having a polymer light-emitting diode according to the present invention;

Figure 5 is a perspective view of a second preferred embodiment of an electronic device having a polymer light emitting diode according to the present invention;

Figure 6 is a cross-sectional view showing a screen body of a second preferred embodiment of an electronic device having a polymer light-emitting diode according to the present invention;

FIG. 7 is a schematic diagram showing the connection of a polymer light-emitting diode module and a control module in a second preferred embodiment of an electronic device having a polymer light-emitting diode according to the present invention.

1‧‧‧Electronic device

2‧‧‧ Polymer Light Emitting Diode Module

11‧‧‧Shell

111‧‧‧Light transmission area

112‧‧‧Electronic component module

13‧‧‧Base

14‧‧‧Support film

141‧‧‧Support

Claims (5)

An electronic device having a polymer light-emitting diode, comprising: an electronic device comprising a casing and an electronic component module disposed in the casing, wherein the casing has a plurality of transparent areas, and the electronic device is a notebook type The computer further includes a main body and a screen body rotatably connected to the main body, and the screen body has a back plate, the outer casing is a back plate of the screen body, and the transparent areas are disposed on the back plate. a plurality of perforations; and a polymer light emitting diode module comprising a flexible film substrate, a plurality of polymer light emitting units disposed on the film substrate, and a conductive electrically connected to the polymer light emitting units a circuit, the arrangement position of the polymer light-emitting units is arranged corresponding to the position of the light-transmitting regions; wherein the outer casing of the electronic device covers the polymer light-emitting diode module and the polymer light-emitting units respectively correspond to The light-transmissive region is such that the polymer light-emitting units emit light and emit light, thereby providing a dynamic decorative effect or a graphic or text outline. An electronic device having a polymer light-emitting diode according to claim 1 further includes a control module disposed in the outer casing of the electronic device and including the polymer light-emitting unit A controller and a driving component are connected by the controller, and the controller controls the polymer light emitting unit to emit light and not emit light. An electronic device having a polymer light-emitting diode according to claim 1, wherein the polymer light-emitting units are made of different polymer materials of predetermined color light. An electronic device having a polymer light-emitting diode according to claim 1 further includes a control module disposed in the outer casing of the electronic device and including the polymer light-emitting unit A controller and a driving component that are connected to each other to provide a graphic or text outline. An electronic device having a polymer light-emitting diode according to claim 1, wherein a transparent lens is disposed on the perforations to prevent dust or moisture from entering the inside of the casing through the perforations.