TWI529082B - An electrical control system of an anti-glare rearview mirror and an anti-glare rearview mirror - Google Patents

Description

Electro-induced metamorphic anti-glare rearview mirror electronic control system and anti-glare rearview mirror

The invention relates to a rear view mirror, in particular to an electro-variable anti-glare rearview mirror electronic control system and an anti-glare rearview mirror.

According to the current car, it is the most important traffic and transportation tool. In order to avoid the rear light of the vehicle or the external environment, the rearview mirror produces reflected light, which causes the driver to have glare and affects driving safety. More and more vehicles will be equipped with an anti-glare rearview mirror.

As the number of vehicles continues to increase, the driving environment is deteriorating. Especially in the case of strong sunlight, the rearview mirrors reflect extremely strong light, causing the driver to have glare and not easily see the road conditions, or at night or in low light. Under the environment, the strong light of the rear vehicle illuminates the rearview mirror, which will cause the driver of the car to have a glare and can not see the road condition, which is likely to cause traffic accidents. In order to improve this deficiency, various manufacturers have developed various types of rear view mirror modules with anti-glare function.

As disclosed in TWM309528, TW533153, TW I265972, it is a rear view mirror with anti-glare function. However, the conventional rearview mirrors use, for example, an electrochromic material or an electrolyte layer to achieve light control effects, except that the material is relatively expensive, the overall volume is large, and the reaction speed is also slow (about 6 to 7 seconds). Or longer, the electronic control system is only used as a switch to switch and does not further improve the reaction speed. Therefore, such conventional anti-glare rearview mirrors The structure is not ideal, and there are shortcomings that need to be improved.

Therefore, it is necessary to provide a novel and progressive electro-optical anti-glare rearview mirror electronic control system and an anti-glare rearview mirror to solve the above problems.

The main object of the present invention is to provide an electro-variable anti-glare rearview mirror electronic control system and an anti-glare rearview mirror, which are driven by square wave alternating current, can improve reflection clearing effect and reduce glare, and greatly increase driving safety; The anti-glare rearview mirror including the electronic control system can effectively adjust the reflection effect according to the intensity of the light, can effectively reduce the reflected glare; can greatly reduce the overall thickness and the driving voltage, and is more easy to drive and save energy and electricity.

To achieve the above object, the present invention provides an electro-variable anti-glare rearview mirror electronic control system, which is electrically connected to two electrodes of an anti-glare rearview mirror, and the electro-variable anti-glare rearview mirror electronic control system includes: The DC boost circuit includes a positive circuit and a negative circuit, the negative circuit is grounded; the AC circuit is continuously flowed, and includes a first transistor connected in series, a second transistor connected in series, a second electrical connector, and a second An integrated circuit (IC) unit, the two first transistors are connected in parallel with the two second transistors, and are respectively connected to the positive circuit and grounded, and the first and second transistors are controllably connected to the An integrated circuit unit that controls the first and second transistor switching to form a DC power from one of the DC boost circuits to be transmitted to the two electrical terminals, the second power The connector is electrically connected to the two electrodes of the anti-glare mirror.

In order to achieve the above object, the present invention provides an anti-glare rearview mirror, comprising the electro-variable anti-glare rearview mirror electronic control system as described above, further comprising: a conductive reflective layer, electrically conductive and having a reflective surface; a metamorphic layer disposed on one side of the reflective surface and disposed on the conductive reflective layer; A first transparent conductive oxide (TCO) layer is disposed on the electro-transformed layer; and a transparent substrate is disposed on the first transparent conductive layer.

1‧‧‧Electrically induced anti-glare rearview mirror electronic control system

2‧‧‧Anti-glare rearview mirror

10‧‧‧DC boost circuit

11‧‧‧ positive circuit

12‧‧‧negative circuit

13‧‧‧Inductors

14‧‧‧ switch

15‧‧‧ diode

16‧‧‧ accumulator

20‧‧‧DC to AC circuit

21‧‧‧First transistor

22‧‧‧Second transistor

23‧‧‧Electrical connection

24‧‧‧Integrated circuit unit

25‧‧‧ Square wave AC

30‧‧‧ Conductive reflective layer

31‧‧‧reflecting surface

32‧‧‧metal pieces

33‧‧‧Second light-transmissive conductive layer

40‧‧‧Electromorphic layer

41‧‧‧PDLC layer

42‧‧‧ spacers

43‧‧‧LCD

50‧‧‧First light-transmissive conductive layer

60‧‧‧Transparent substrate

70‧‧‧Edge

1 is a circuit diagram of an electric control system for an electro-variable anti-glare rearview mirror according to a preferred embodiment of the present invention.

2 is a waveform diagram of an alternating current power supply according to a preferred embodiment of the present invention.

3 is a perspective view of an anti-glare rearview mirror in accordance with a preferred embodiment of the present invention.

4 is a cross-sectional view of an anti-glare rearview mirror in accordance with a preferred embodiment of the present invention.

5 and 6 are schematic views showing the operation of an anti-glare rearview mirror according to a preferred embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Please refer to FIG. 1 to FIG. 2, which illustrate a preferred embodiment of the present invention. The electro-variable anti-glare rearview mirror electronic control system 1 of the present invention is electrically connected to two electrodes of an anti-glare rearview mirror. The abnormal anti-glare rearview mirror electronic control system 1 includes a DC current boosting circuit 10 and a DC current alternating current circuit 20.

The DC boost circuit 10 includes a positive circuit 11 and a negative circuit 12, and the negative circuit 12 is grounded. Specifically, the DC boost circuit 10 further includes an inductor 13, a switch 14, a diode 15 and an accumulator 16, the positive circuit 11 includes a positive terminal 111, and the inductor 13 is connected in series Between the positive terminal 111 and a first end of the diode 15, the switch 14 is grounded at one end, and the other end is connected in parallel with the inductor 13 to the first end of the diode 15. The end of the energy storage device 16 is grounded. The other end is connected in parallel with the second end of one of the diodes 15. among them The switch 14 is, for example, a metal oxide semiconductor (MOS) field effect transistor switch, such as an inductive energy store or capacitor. Thereby, the voltage can be boosted.

The DC-to-AC circuit 20 includes two first transistors 21 connected in series, a second transistor 22 connected in series, two electrical terminals 23, and an integrated circuit (IC) unit 24, the two first transistors 21 is connected in parallel with the second transistor 22 and connected to the cathode circuit 11 and grounded. The first or second and second transistors 21, 22 may be field effect transistors (FETs), single junction transistors. (UJT) or a programmable single combined transistor (PUT), wherein the first or/and second transistors 21, 22 may be PNP type transistors or NPN type transistors. Each of the first and second transistors 21, 22 is controllably coupled to the integrated circuit unit 24, and the integrated circuit unit 24 controls the first and second transistors 21, 22 to switch from the One of the direct current boosting circuits 10 forms a square wave alternating current 25 and is transmitted to the two electrical terminals 23. The two electrical terminals 23 are electrically connected to the two electrodes of the anti-glare mirror.

Referring to FIG. 3 to FIG. 6 , the present invention further provides an anti-glare rearview mirror 2 comprising the electro-variable anti-glare rearview mirror electronic control system 1 as described above, and further comprising a conductive reflection. The layer 30, an electro-transformed layer 40, a first transparent conductive oxide (TCO) layer 50, a transparent substrate 60 and a side 70.

The conductive reflective layer 30 is electrically conductive and has a reflective surface 31 for reflecting light. In this embodiment, the conductive reflective layer 30 includes a metal piece 32 and a second transparent conductive layer 33. One of the metal sheets 32 The reflective surface 31 is disposed on the side, and the second transparent conductive layer 33 is disposed on the reflective surface 31. The metal sheet 32 is, for example, an aluminum sheet or the like. Of course, the conductive reflective layer 30 can be a single conductive layer integrally formed. The reflective surface 31 is formed (e.g., polished) on a surface.

The electro-deformation layer 40 is located on one side of the reflective surface and is disposed on the conductive reflective layer 30 on. In the present invention, "electro-transformation" means a state change such as liquid crystal turning, electrochromism or the like of a passing light after a state change after energization. The electro-deformation layer 40 is a polymer dispersed liquid crystal (PDLC) layer, a suspended particle device (SPD) layer, or an electrochromic window (ECW) layer. In the present embodiment, the electro-deformation layer 40 is a PDLC layer 41. The PDLC layer 41 includes a plurality of spacers 42 which may be, for example, ceramic or plastic (eg, PS) particles. The radial dimension is between 2 and 18 micrometers (μm), preferably between 5 and 10 micrometers. In the PDLC layer 41, the spacer 42 is present in an amount of 0.4% to 0.8%, preferably 0.5%. However, the above radial dimensions and/or contents may vary depending on different conditions. Wherein, the thickness of the PDLC layer 41 is positively correlated with the required driving voltage, and the thicker the thickness, the higher the driving voltage. For example, when the thickness of the PDLC layer 41 is 20 micrometers, the driving voltage needs to be about 65 volts; when the thickness of the PDLC layer 41 is 5 to 8 micrometers, the driving voltage only needs about 18 volts. The spacers 42 at least partially abut the conductive reflective layer 30 and the first transparent conductive layer 50, thereby accurately and smoothly controlling the conductive reflective layer 30 and the first transparent conductive layer 50. The distance between the PDLC layers 41 is controlled to be between 2 and 18 microns. Thus, compared with the conventional structure, the present invention can greatly reduce the thickness and the driving voltage, and is easier to drive and save energy and electricity.

The first transparent conductive layer 50 is disposed on the electro-deformation layer 40, and the first transparent conductive layer 50 or/and the second transparent conductive layer 33 may be indium tin oxide (ITO). Indium zinc oxide (IZO) or aluminum-doped zinc oxide film (Al-doped ZnO, AZO). Preferably, the conductive reflective layer 30 and the first transparent conductive layer 50 are staggered and partially exposed with respect to the electro-transformed layer 40, so that it is convenient to be electrically connected to an external power source (eg, bonding, The first light-transmissive conductive layer 50 and the second light-transmissive conductive layer 33 are also not damaged by soldering, bonding, or the like.

The transparent substrate 60 is disposed on the first transparent conductive layer 50. The transparent substrate 60 is a glass or PET substrate, or the like. The PET substrate has low cost in addition to packaging and protection effects. It is easy to manufacture and extremely thin.

The edge seal 70 encloses the electro-transformed layer 40 between the conductive reflective layer 30 and the first light-transmissive conductive layer 50. When the electro-transformed layer 40 is, for example, a PDLC layer 41, it includes a slight flow. The liquid crystal 43, the edge seal 70 is disposed to prevent the liquid crystal 43 on the upper portion of the PDLC layer 41 from being gradually lost due to gravity, and the upper portion of the anti-glare rearview mirror 2 is lost. The edge seal 70 can be any glue such as UV glue, epoxy glue or the like. It can be understood that the edge seal 70 is not provided.

Please further cooperate with reference to FIG. 1 and FIG. 2 to FIG. 4 to FIG. 2 , the second electrical connection end 23 of the DC-to-AC circuit 20 and the second transparent conductive layer 33 of the conductive reflective layer 30 and the first transparent conductive layer 50 . Electrically connected, the DC-to-AC circuit 20 supplies a square wave AC 25 to the conductive reflective layer 30 and the first light-transmissive conductive layer 50. The DC boost circuit 10 can boost a DC voltage of, for example, 12 volts (V) to 60 volts, and then convert it to AC power via the DC-to-AC circuit 20.

In actual operation, when the power of the DC-to-AC circuit 20 is not conducted to the conductive reflective layer 30 and the first transparent conductive layer 50, the liquid crystal 43 in the PDLC layer 41 is not subjected to an electric field and is not rotated toward the same direction. The direction (as shown in FIG. 5), the incident/reflected light is scattered, so that after the strong light is reflected by the anti-glare rearview mirror 2 of the present invention, the intensity thereof is lowered, and the reflected glare can be reduced; when the DC-to-AC circuit 20 is Power is conducted to the conductive reflective layer 30 and the first When the conductive layer 50 is transparent, the liquid crystal 43 in the PDLC layer 41 is rotated by the electric field and faces in the same direction (as shown in FIG. 6), allowing all incident/reflected light to pass, so that the weaker light obtains higher reflection. The effect is to maintain a better reflection. It is worth mentioning that the DC-to-AC circuit 20 generates the square wave alternating current 25, which is switched rapidly, for example, between +60 volts and -60 volts, compared to the use of sine wave alternating current. The liquid crystal 43 in the PDLC layer 41 is subjected to an electric field and rotates in the same direction, and can be continuously maintained in the same direction without being turned back, and does not continuously change the positive and negative voltages as the sine wave alternating current does not continuously maintain the liquid crystal 43 toward the same direction. Direction, so it can completely maintain the anti-glare rearview mirror transparency, reflection effect, clear and no delay or overlapping problems, greatly increasing driving safety. The change in the above reflection effect can be achieved, for example, by an automatic light sensing and control circuit.

In summary, the electro-variable anti-glare rearview mirror electronic control system of the present invention can generate square wave alternating current to drive the anti-glare rearview mirror, which can improve the clear reflection effect and reduce the glare, thereby greatly increasing the driving safety.

Through the control of the electro-variable anti-glare rearview mirror electronic control system, the anti-glare rearview mirror of the invention can effectively adjust the reflection effect according to the intensity of the light, and can effectively reduce the reflected glare.

Moreover, the majority of the spacers in the electro-deformation layer can accurately and smoothly control the thickness of the electro-transformation layer between 2 and 18 microns, which can greatly reduce the thickness and the driving voltage, and is easier to drive and save energy.

In summary, the overall structural design, practicability and efficiency of the present invention are indeed fully in line with the needs of industrial development, and the disclosed structural invention is also an unprecedented innovative structure, so it has "novelty" should Undoubtedly, the invention can be more effective than the conventional structure, and therefore has "progressiveness", which fully complies with the invention patents of the Chinese Patent Law. The requirements for the application requirements are to file a patent application in accordance with the law, and I would like to ask the bureau to review it as soon as possible and give it affirmation.

1‧‧‧Electrically induced anti-glare rearview mirror electronic control system

10‧‧‧DC boost circuit

11‧‧‧ positive circuit

12‧‧‧negative circuit

13‧‧‧Inductors

14‧‧‧ switch

15‧‧‧ diode

16‧‧‧ accumulator

20‧‧‧DC to AC circuit

21‧‧‧First transistor

22‧‧‧Second transistor

23‧‧‧Electrical connection

24‧‧‧Integrated circuit unit

Claims (10)

An electro-variable anti-glare rearview mirror electronic control system is electrically connected to two electrodes of an anti-glare rearview mirror, and the electro-variable anti-glare rearview mirror electronic control system comprises: a constant current boosting circuit including a positive pole a circuit and a negative circuit, the negative circuit is grounded; the alternating current circuit comprises a first transistor connected in series, a second transistor connected in series, a second electrical connection, and an integrated circuit (IC) unit. The two first transistors are connected in parallel with the two second transistors, and are respectively connected to the positive electrode circuit and grounded, and the first and second transistors are controllably connected to the integrated circuit unit, respectively. The circuit unit can control the first and second transistor switching to form a DC power from one of the DC voltage boosting circuits to be transmitted to the two electrical terminals, and the two electrical terminals are provided for the anti-glare The two electrodes of the rearview mirror are electrically connected. The electro-variable anti-glare rearview mirror electronic control system according to claim 1, wherein the DC boosting circuit further comprises an inductor, a switch, a diode and an accumulator, the positive circuit including a positive Extremely, the inductor is connected in series between the positive terminal and a first end of the diode, the switch is grounded at one end, and the other end is connected in parallel with the inductor to the first end of the diode, the energy storage device One end is grounded, and the other end is connected in parallel with one of the second ends of the diode. The electro-variable anti-glare rearview mirror electronic control system according to claim 1, wherein the first or/and second electro-crystalline system is a PNP-type transistor or an NPN-type transistor. The electro-variable anti-glare rearview mirror electronic control system according to claim 1, wherein the first or/and second electro-crystalline system is a field effect transistor (FET), a single junction transistor (UJT) or a programmable Single combined transistor (PUT). An anti-glare rearview mirror comprising the electro-induced metamorphic anti-glare rearview mirror according to any one of claims 1 to 4 The electronic control system further includes: a conductive reflective layer electrically conductive and having a reflective surface; an electro-transformed layer disposed on one side of the reflective surface and disposed on the conductive reflective layer; a first transparent conductive (transparent) A conductive oxide (TCO) layer is disposed on the electro-transformed layer; and a transparent substrate is disposed on the first light-transmissive conductive layer. The anti-glare rearview mirror according to claim 5, wherein the electro-deformation layer is a polymer dispersed liquid crystal (PDLC) layer, a suspended particle device (SPD) layer, or an electro-induced An electrochromic window (ECW) layer. The anti-glare rearview mirror according to claim 6, wherein the electro-deformation layer is a PDLC layer, the PDLC layer comprises a plurality of spacers, and the spacer has a radial dimension of 2 to 18 micrometers (μm). The spacers at least partially abut the conductive reflective layer and the first light-transmissive conductive layer. The anti-glare rearview mirror of claim 7, wherein the spacer has a radial dimension of between 5 and 10 microns, and the spacer is present in an amount of from 0.4% to 0.8%. The anti-glare rearview mirror according to claim 5, wherein the anti-glare rearview mirror further comprises an edge sealing the electro-transformed layer on the conductive reflective layer and the first transparent conductive layer between. The anti-glare rearview mirror of claim 5, wherein the conductive reflective layer and the first light-transmissive conductive layer are staggered and partially exposed with respect to the electro-transformed layer.