TWM519761U - Uniform lighting control system of light emitting film for keyboard - Google Patents

Description

Illuminated film uniform illumination control system for keyboard

The present invention provides a uniform illumination control system for a luminescent film for a keyboard, in particular, a plurality of reflective conductive layers respectively bonded to the transparent conductive layer and the surface of the substrate, respectively, on the upper and lower sides of each of the LED dies of the luminescent film, and are controlled by a PWM controller The output of the LED die is controlled by a plurality of driving lines to the reflective conductive layer to control the luminous intensity of the LED die.

According to the rapid development of today's electronic technology and information industry, various electronic products are moving toward light, thin, short, small and powerful trends, such as computers, notebook computers, mobile Internet devices (MIDs), smart phones, Tablet PCs, etc., have become indispensable electronic products for modern people in daily life or work, and most of the users and electronic products use mouse, keyboard and other input devices to communicate, and the keyboard is most convenient. Input operations for text, numbers, or commands, and enhance useful functions.

Furthermore, in order to enable the human eye to clearly see the symbols on each button in a low-light environment, a manufacturer introduces a light guide plate and a light source technology into the keyboard, and develops a backlit keyboard with a backlight module to make the backlight The light generated by the module can be projected onto the back of each keycap to form a backlight effect, so that the user can clearly see the symbol on the keycap for convenient operation, and the backlight keyboard currently on the market includes a button module. And a backlight module, wherein the backlight module has a light guide plate, and is provided with a flexible circuit board and a light emitting diode on one side surface of the light guide plate. a light-emitting unit, wherein the light-emitting unit projects light to the light guide plate to uniformly illuminate the light guide plate, and a reflector disposed on the lower surface of the light guide plate for reflecting light emitted from the lower surface of the light guide plate is returned to the light guide plate, and the surface of the light guide plate is The light-shielding sheet corresponding to the button module is arranged to pass the light emitted by the light guide plate through the light-transmitting portion of the light-shielding sheet to the button module to form a backlight.

However, the current keyboard design will become thinner and thinner in a limited space, and the internal space of the keyboard will also be narrow. The total thickness of the backlight module is the thickness of the light guide plate plus the stacking unit of the light-emitting unit and the reflector. The overall thickness will be limited by its own structure and cannot be reduced more effectively. Therefore, some companies have developed ultra-thin light-emitting diode (LED) light paper. The main technology is to pass the LED die. The special upper and lower electrode directions are cut to a size of less than 50 mm in diameter, and the cut plurality of LED dies are suspended in the neutral solution, and then randomly dispersed on the surface of the conductive layer by a process such as printing or spraying. After baking and curing, it is adhered to the conductive layer to form a main luminescent layer, and then the conductive layer is sandwiched between the other two layers of the material to be encapsulated, but the neutral solution is in an ideal hypothetical state, and is actually operated. During the process, the plurality of LED dies are easily dispersed by the cohesive force and are not uniformly printed or sprayed on the surface of the conductive layer, and the density of the LED crystals after baking is not easily controlled. When the light-emitting diode paper is applied to the illuminated keyboard, the density of the LED crystals distributed per unit area is different, and the light intensity generated by the energization of the plurality of LED chips is not consistently projected on each button. Unevenness, resulting in flashing of light spots or starry sky, will affect the overall visual effect of the illuminated keyboard, which is the direction for those who want to work in this industry.

Therefore, the new creators have in view of the above-mentioned conventional use of optical paper itself LED die composition The density of the randomly distributed density is not easy to control, which causes the problem that the overall luminous intensity of the button derived from the illuminated keyboard is not consistent and the brightness is uneven. The collected data is evaluated and considered by various parties, and is utilized in the industry. With years of research and development and continuous revision, we have designed a new type of illuminating film uniform illumination control system for keyboards.

The main purpose of the present invention is to form a transparent conductive layer on one side of the plurality of LED dies of the luminescent film, and form a plurality of reflective conductive layers formed on the surface of the substrate at the other side of the LED dies. The PWM controller is respectively connected with a plurality of driving lines electrically connected to the reflective conductive layer, and a universal circuit electrically connected to the transparent conductive layer, and the PWM controller outputs signals respectively through the plurality of driving lines. When the conductive layer is on the reflective layer, the control current can be sequentially outputted through the LED die to emit visible light, and the light is incident on the corresponding button unit on the button module, so that the independent illumination intensity of each button unit is controlled without The luminous intensity cannot be consistent due to the random distribution density of the plurality of LED crystals per unit area, and the brightness output of each button unit can be provided under the condition of constant voltage or constant current, thereby achieving the effect of greatly improving the uniformity of illumination. .

The secondary purpose of the creation is that the surface of the luminescent film is formed with a plurality of transparent regions respectively corresponding to the button unit. When the PWM controller outputs a signal, it can be turned ON (ON) or OFF (OFF, OFF). The repeated pulse sequence of the open circuit controls the current through the LED die, and the light generated by the LED die is projected onto the phosphor powder layer on the surface of the transparent conductive layer to excite visible light, and then enters the button module through the light transmitting region. The button unit on the top enables the function of keyboard illumination.

1‧‧‧ luminescent film

10‧‧‧Lighting area

11‧‧‧LED dies

12‧‧‧Transparent conductive layer

13‧‧‧Substrate

14‧‧‧Reflective conductive layer

15‧‧‧Fluorescent powder layer

16‧‧‧Environmental barrier

2‧‧‧PWM controller

21‧‧‧Drive lines

22‧‧‧Common connection line

23‧‧‧Power cord

24‧‧‧Grounding conductor

3‧‧‧Upper circuit layer

31‧‧‧First line

4‧‧‧lower circuit layer

41‧‧‧second line

5‧‧‧Key Module

51‧‧‧Key unit

52‧‧‧Front frame

The first figure is a schematic diagram of the structure in which the creative illuminating film is connected to the controller.

The second figure is a top view of the creation applied to the keyboard.

The third figure is a top view of the creation button module.

The fourth figure is a top view of the circuit layer of the creation.

The fifth figure is a top view of the created luminescent film.

The sixth figure is a top view of the circuit layer under the creation.

In order to achieve the above objectives and effects, the technical means and its construction adopted in the present invention are described in detail in the preferred embodiment of the present invention, and the structure and function are as follows.

Please refer to the first and second figures, which are respectively a schematic diagram of the structure of the creative illuminating film and the controller, and a top view applied to the keyboard. It can be clearly seen from the figure that the keyboard of the present invention is uniformly illuminated by the illuminating film. The control system includes the illuminating film 1 and the at least one PWM controller 2, so the main components and features of the present invention are as follows, wherein the illuminating film 1 is a micro-multiple LED dies 11 and is in the LED dies. The transparent conductive layer 12 is bonded to the side of the 11th side with the transparent dielectric layer 111, and the other side of each LED die 11 is bonded to the plurality of reflective conductive layers 14 formed on the surface of the substrate 13, respectively. The upper and lower sides of the particle 11 are respectively connected to the transparent conductive layer 12 and the reflective conductive layer 14 to form an electrical conduction path, and the transparent conductive layer 12 is formed with a phosphor layer 15 on the other side surface of the LED die 11. An environmental barrier layer 16 is formed on the surface of the phosphor powder layer 15. When the reflective conductive layer 14 of the positive electrode is energized, current can flow through the LED die 11 to the transparent conductive layer 12 of the negative electrode, and is covered by the LED die 11. The generated light is projected onto the phosphor layer 15 and the excitation energy is radiated in the form of light, so that the luminescent film 1 emits visible light.

Furthermore, the plurality of LED dies 11 after the luminescent film 1 is diced are suspended in a neutral solution, and are randomly dispersed on the surface of the transparent conductive layer 12 by a process such as printing or spraying, so that the LED dies 11 can be utilized around the luminescent film 11. After baking and curing, the neutral dielectric 111 is attached to the surface of the transparent conductive layer 12, and the LED crystal grains 11 are respectively bonded to the plurality of reflective conductive layers 14 on the surface of the substrate 13 to form a main light-emitting layer, and the transparent conductive layer 12 is formed. A phosphor layer 15 is formed on the other side surface of the LED die 11, and an environmental barrier layer 16 is formed on the surface of the phosphor layer 15, but the portion related to the luminescent film 1 is manufactured in many ways. The actual application change structure design only needs to provide the reflective conductive layer 14 to electrify the current to flow through the LED die 11 to the transparent conductive layer 12 to emit visible light, so the following description will be explained together, and it is combined with Chen Ming.

The PWM (Pulse Width Modulation) controller 2 is a universal driving circuit 21 electrically connected to the reflective conductive layer 14 of the luminescent film 1 and electrically connected to the transparent conductive layer 12 The line 22, and the power supply line 23 and the grounding conductor 24, which are electrically connectable to the power supply for the predetermined power supply, can output the signals through the plurality of driving lines 21 by the PWM controller 2 to sequentially control the LED dies 11 by the timing switches. Luminous intensity.

Please refer to the third, fourth, fifth and sixth figures, which are the top view of the creative button module, the top view of the upper circuit layer, the top view of the luminescent film and the top view of the lower circuit layer, as can be clearly seen from the figure. The surface of the luminescent film 1 is formed with a plurality of transparent regions 10 through which light generated by the plurality of LED dies 11 passes, and is disposed at the upper and lower sides of the luminescent film 1 The upper circuit layer 3 and the lower circuit layer 4 are respectively disposed, and the first circuit 31 and the second circuit 41 are respectively disposed on the surface opposite to the upper circuit layer 3 and the lower circuit layer 4, and then a surface is disposed on the surface of the upper circuit layer 3. The button module 5 includes a bottom plate, a plurality of button units 51 and elastic members (not shown). The button units are respectively disposed on the bottom plate and have a key cap and a key cap and a bottom plate. The connecting mechanism for the up and down movement of the keycap is provided, and the elastic elements are respectively disposed between the upper circuit layer 3 and the button unit 51, and then the outer frame 52 is coupled to the plurality of button units 51, when the user's finger presses When the input action is performed on the surface of the keycap of the button unit 51, the keycap will press the elastic member to touch the upper circuit layer 3 to make the first line 31 and the second line 41 of the lower circuit layer 4 contact with each other. Electrically conducting, the controller (not shown) that triggers the output of the signal corresponding to the symbol of the pressed button unit 51 to the illuminated keyboard to issue an instruction signal, but the structural design of the button module 5 is a lot, and the composition of the details is also The case of the creation of points, is hereby no longer be a repeat.

However, the above-mentioned complex PWM controller 2 is preferably disposed on the surface of the upper circuit layer 3 and located outside the first line 31. However, in practical applications, the PWM controller 2 may also be disposed on the lower circuit layer. 4 is located on the surface of the second line 41, and then the plurality of driving lines 21 and the common lines 22 of the PWM controller 2 are respectively connected to the reflective conductive layer 14 of the luminescent film 1 and the transparent conductive layer 12 to form an electrical conduction path. All the simple modifications and equivalent structural changes made by the use of this manual and the contents of the drawings shall be included in the scope of the patent of this creation and shall be combined with Chen Ming.

The plurality of transparent areas 10 on the illuminating film 1 are respectively corresponding to the button unit 51 of the button module 5, and the at least one PWM controller 2 outputs signals to the reflective conductive layer 14 of the luminescent film 1 through the plurality of driving lines 21, respectively. When it is on, it can be turned on (ON , turning on or off (OFF, disconnect) the repeated pulse sequence, the respective control currents emit visible light through the LED die 11, and the light generated by the plurality of LED dies 11 is incident on the button module 5 through the light transmitting region 10 After the light-transmissive button unit 51 is worn out, the function of the keyboard illumination can be realized. The multi-channel PWM controller 2 can output signals to control each of the button units 51 corresponding to the light-transmitting region 10 with a timing switch. The plurality of LED dies 11 are such that the independent illuminating intensity of each of the button units 51 can be controlled, so that each button unit 51 does not cause the illuminating intensity to be consistent due to the density of the random distribution of the plurality of LED dies 11 per unit area. Under the condition of constant voltage or constant current, the uniform brightness output of each button unit 51 can be provided, thereby achieving the effect of greatly improving the uniformity of illumination.

The above detailed description is intended to illustrate a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalents and modifications may be made without departing from the spirit of the invention. Changes are to be included in the scope of patents covered by this creation.

In summary, the above-mentioned keyboard illuminating film uniform illumination control system can really achieve its efficacy and purpose when used, so this creation is a practical and excellent creation, which is in line with the application requirements of new patents. To file an application, I hope that the trial committee will grant the case as soon as possible to protect the hard work of the new creators. If there is any doubt in the bureau, please do not hesitate to give a letter, and the new creators will try their best to cooperate with them.

1‧‧‧ luminescent film

11‧‧‧LED dies

12‧‧‧Transparent conductive layer

13‧‧‧Substrate

14‧‧‧Reflective conductive layer

15‧‧‧Fluorescent powder layer

16‧‧‧Environmental barrier

2‧‧‧PWM controller

21‧‧‧Drive lines

22‧‧‧General line

23‧‧‧Power cord

24‧‧‧Grounding conductor

Claims (6)

A luminescent film uniform illumination control system for a keyboard, comprising: a luminescent film and at least one PWM controller, wherein: the illuminating film has a plurality of LED dies, and a transparent conductive layer is combined at one side of the LED dies, and each The other side of the LED die is respectively coupled to the plurality of reflective conductive layers on the surface of the substrate to form an electrical conduction path; the PWM controller is respectively connected to the reflective conductive layer and can output signals for timing switch Do not control the multiple drive lines of the LED die light intensity, and the general line electrically connected to the transparent conductive layer. The illuminating film uniform illuminating control system for a keyboard according to claim 1, wherein the illuminating film has a neutral dielectric formed around the LED die and on the other side surface of the transparent conductive layer relative to the LED dies. A phosphor layer is formed, and an environmental barrier layer is formed on the surface of the phosphor layer. The illuminating film uniform illumination control system for a keyboard according to claim 1, wherein the upper and lower sides of the illuminating film are respectively provided with an upper circuit layer and a lower circuit layer, and the upper circuit layer and the lower circuit layer are opposite to each other. a first line and a second line are respectively disposed on the surface, and a button module is disposed on the surface of the upper circuit layer, and the button module includes a first circuit and a lower circuit layer for pressing and touching the upper circuit layer. The second line contacts are in contact with each other to form a button unit that electrically turns on the command signal. The illuminating film uniform illuminating control system for a keyboard according to claim 3, wherein the illuminating film has a plurality of transparent regions formed by light rays generated by the plurality of LED dies respectively corresponding to the button unit. . The illuminating film uniform illumination control system for a keyboard according to the third aspect of the invention, wherein the plurality of button units of the button module are combined with an outer frame. The illuminating film uniform illumination control system for a keyboard according to the first aspect of the invention, wherein the PWM controller is a power supply wire and a grounding wire connected to a power supply for connection to a predetermined power supply.