WO2006015529A1

WO2006015529A1 - An adaptive sun visor

Info

Publication number: WO2006015529A1
Application number: PCT/CN2005/000805
Authority: WO
Inventors: Fan He; Long He; Zhaozhi Mei
Original assignee: Fan He; Long He; Zhaozhi Mei
Priority date: 2004-08-13
Filing date: 2005-06-08
Publication date: 2006-02-16
Also published as: CN2736198Y

Abstract

The present invention discloses an adaptive sun visor which comprises a microcontroller (2), a mini-keyboard (4), a photosensor array (1) and a liquid crystal panel (3) composed of an amount of pixels. The mini-keyboard (4), the photosensor array (1) and the liquid crystal panel (3) are all communicated with the microcontroller (2). It is characterized in that the microcontroller (2) is provided with a multichannel A/D converter, which can read output values of the photosensor array (1) so as to control the activation of the pixels in single chip or in groups. The adaptive sun visor of the present invention can help a driver avoid offending source of horizontal light and keep good sight in the front direction, which results in a safer driving.

Description

Adaptive sun visor

The invention relates to a sun visor, in particular to an adaptive sun visor whose light transmission coefficient can be electronically controlled, and belongs to the technical field of optoelectronic applications.

BACKGROUND OF THE INVENTION - Sun visors are provided on cars and other vehicles to protect the driver and passengers from the sun and the illumination of the car's light lines. The automotive sun visors disclosed in the prior art use opaque or translucent shading materials to impair the light to the driver or passengers to a certain extent. China Patent

ZL02160110.0 discloses a sun visor which can be easily and quickly fixed and has multiple functions, including a sunshade cloth and a wire frame which is made of a flexible metal/plastic in the periphery of the sunshade cloth. The wire frame has at least A part of the protruding wire frame outside the sunshade cloth is exposed, and the area formed by the protruding wire frame is larger than the entire area of the sunshade cloth. U.S. Patent No. 5,530,572 discloses an adaptive visor having an optically controllable optically permeable panel, but which does not allow partial transmission of the visor and partial opacity.

With the prior art sun visor, the driver's field of view is completely blocked when the oncoming car light line illuminates from the horizontal direction, or when the morning and evening sun rays are incident from a very low angle. Summary of the invention

The invention solves the technical problem that the sun visor of the prior art is used when the light is incident from the horizontal direction, or when the sunlight is incident from a very low angle in the morning and evening, the driver's field of view is completely blocked to cause a glare effect. ^ The technical solution used is to provide an adaptive sun visor.

The adaptive sun visor provided by the present invention comprises a microcontroller 2, a micro keyboard 4, a photosensor array 1 and a liquid crystal panel 3, wherein the micro keyboard 4, the photosensor array 1 and the liquid crystal panel 3 are all connected to the microcontroller 2, and the liquid crystal The board 3 is composed of a number of pixels, characterized in that the microcontroller 2 has multiple A/D channels to read out the output values of the photosensor array, controlling the pixels to be monolithically activated or group activated. The microcontroller 2 includes a general purpose input and output, a serial communication port/reset input, an interrupt input, and an A/D channel. The microcontroller 2 has a number of I/O ports that can interface with the micro keyboard 4 and also drive the liquid crystal panel 3. The sensor array 1 consists of a vertical light sensor array, a horizontal light sensor array or a combination of both. The photosensor array 1 is attached with an A/D channel having a plurality of channels to read its input signal from the photosensor. The sensor array 1 includes a filter 11, The photosensitive glass 13, the cylindrical lens 12, the one-dimensional photosensor array 14 and the photosensor array interface circuit 15 which is connected to the microcontroller 2 and feeds the data into the microcontroller 2. The liquid crystal panel has a passive matrix LCD driver having a serial port that communicates with the microcontroller and drives a liquid crystal panel with three front planes and six rear planes. The liquid crystal panel may also have an active matrix LCD driver having a serial port that communicates with the microcontroller and drives a thin film liquid crystal cell with a specific pixel and a common back film. The pixels of the liquid crystal panel 3 are in a transparent state when they are not activated, and are in a translucent state when activated. The bottom layer of the front substrate and the rear substrate of the liquid crystal panel 3 is laminated glass or plastic. The micro keyboard 4 has a mode selection button, an up button, a down button and a reset button.

By implementing the adaptive sun visor provided by the present invention, the driver can safely drive the vehicle while avoiding the interference of horizontal direct light and maintaining a good view.

BRIEF DESCRIPTION OF THE DRAWINGS ' '

1 is a functional block diagram of an adaptive sun visor according to the present invention;

2 is a schematic structural view of the photosensor array of the adaptive sun visor according to the present invention; FIG. 3 is a schematic view showing the effect of the prior art sun visor using state;

4 is a schematic view showing the effect of the use state of the adaptive sun visor according to the present invention;

FIG. 5 is a schematic diagram of the working principle of the adaptive sun visor according to the present invention.

detailed description

The adaptive sun visor according to the embodiment of the present invention will be described in detail below with reference to Figs.

Embodiment 1. Adaptive sun visor with horizontal stripe front substrate

This embodiment consists of the following parts:

1. The liquid crystal panel 3 has a front substrate of 16 horizontal stripes and a rear substrate.

2. Photosensor array 1, with 6 light sensors to detect the vertical position of the incident light source.

3. Microcontroller 2, with 22 or more general purpose inputs and outputs, one reset input, one interrupt input and eight A/D channels.

4. The micro keyboard 4 has a mode selection button, an up button, a button and a reset button. When the mode selection button is pressed, one of the seven operation modes can be selected, and when the up key is pressed, the activated stripe position on the liquid crystal panel is moved upward. When the key is pressed, the position of the activated stripe will be Move down. The adaptive sun visor is reset when the reset button is pressed. When the adaptive sun visor is reset, the control circuit is activated to restore the sun visor to the default operating mode.

The operation mode of this embodiment is as follows:

1. Single stripe mode. This mode is activated by only one front stripe plane.

2. Double stripe mode. In this mode, two adjacent front fringe planes are activated and the two fringes will be activated to the same darkness.

3. Three-striped mode. In this mode, three adjacent front fringe planes are activated. The middle strip front substrate is activated to the maximum darkness based on the intensity of the incident light source, and the adjacent two-strip front substrate is activated to 70% of the darkness corresponding to the middle stripe plane

4. Four-striped mode. In this mode, four adjacent stripe front substrates are activated, the two middle stripe front substrates are activated to the maximum darkness based on the intensity of the incident light source, and two adjacent stripe front substrates are activated to the equivalent of the middle strip. 70% of the darkness of the front substrate.

5. Five-striped mode. In this mode, five adjacent stripe front substrates are activated, one middle stripe front substrate is activated to maximum darkness based on the intensity of the incident light source, and two stripe front substrates adjacent to the middle stripe front substrate are activated to the middle The darkness of the front substrate of the stripe is 80%, and the other two stripe front substrates are activated by 50% of the darkness of the front stripe front substrate.

6. Six-striped mode. In this mode, six adjacent stripe front substrates are activated, two intermediate stripe front substrates are activated to maximum darkness based on the intensity of the incident light source, and two stripe front substrates adjacent to the intermediate stripe front substrate are activated. The darkness of the front substrate to the middle stripe is 80%, and the other stripe front substrate is activated to 50% of the darkness of the intermediate plane.

7. Seven-striped mode. In this mode, seven adjacent stripe front substrates are activated, one middle stripe front substrate is activated to the maximum darkness based on the intensity of the incoming light source, and two stripe front substrates adjacent to the middle stripe front substrate are activated. To 80% of the darkness of the mid-plane, the two outer stripe front substrates are activated to 60% of the mid-plane darkness, and the stripe front substrate on both sides is activated to 40% of the mid-plane darkness.

Embodiment 2: Adaptive sun visor with vertical stripe front substrate + This embodiment has the following parts:

1. The liquid crystal panel 3 has 32 vertical stripe front substrates and a rear substrate.

2. Photosensor array 1, with 12 light sensors to detect the horizontal position of the incident light source. Attached There is an A/D channel with sufficient channels to read the 12 optically sensed input signals.

3. Microcontroller 2, with 38 or more general purpose inputs and outputs, one reset input, one interrupt input and several A/D channels.

4. Micro keyboard 4, with a mode selection button, an up button, a button and a reset button. Press the mode selection button to select one of the 7 operating modes. Press the up button to move the activated stripe position up on the LCD panel. Press the key to move the activated stripe down. Press the reset button to reset the adaptive sun visor. When the adaptive sun visor is reset, the control circuit will be activated to restore the sun visor to the default operating mode.

The operation mode of this embodiment is as follows:

1. Single stripe mode. In this mode, the two front stripe substrates are activated.

2. Double stripe mode. In this mode, two sets of front stripe substrates are activated, each consisting of two adjacent front stripe substrates that are activated to the same darkness.

3. Three-striped mode. In this mode, each set of front substrates consists of three adjacent front stripe substrates, the middle stripe front substrate is activated to the maximum darkness based on the intensity of the incident light source, and the adjacent two stripe front substrates are activated to the equivalent 70% of the darkness of the middle stripe plane.

4. Four-striped mode. In this mode, each set of front substrates consists of four adjacent stripe front substrates. The two intermediate stripe front substrates are activated to the maximum darkness based on the intensity of the incident light source, while the adjacent two front grain substrates are activated to 70% of the darkness of the intermediate fringe plane.

5. Five-striped mode. In this mode, each set of front substrates consists of five adjacent striped front substrates. An intermediate fringe plane is activated to the maximum darkness based on the intensity of the incident light source, and the adjacent two stripe front substrate will be activated to 80% of the darkness of the intermediate stripe plane, and the two outer stripe front substrates are Activated to 50% of the darkness of the mid-strip plane.

6. Six-striped mode. In this mode, each set of front substrates consists of six adjacent striped front substrates. The two intermediate stripe front faces are activated to the maximum darkness based on the intensity of the incident light source, and the adjacent two stripe front substrates are activated to 80% of the darkness of the intermediate stripe plane, and the two outer stripe front substrates are Activated to 50% of the darkness of the mid-strip plane.

7. Seven-striped mode. In this mode, each set of front fringe planes consists of seven adjacent stripe front substrates. An intermediate stripe front substrate is activated to a maximum darkness corresponding to the incident light source intensity, and adjacent two stripe front substrates are activated to 80% of the darkness of the intermediate stripe front substrate, two outer edges The stripe front substrate is activated to 60% of the darkness of the intermediate stripe plane, and the two edged stripe front substrates are activated to 40% of the darkness of the middle stripe plane.

Embodiment 3: Adaptive sun visor adopting passive matrix liquid crystal panel

This embodiment has the following parts:

1. The liquid crystal panel 3 has 32 vertical stripe front substrates and 16 horizontal stripe rear substrates.

2. Photosensor array 1, a horizontal photosensor array with 12 photosensors to detect the horizontal position of the incident source, a vertical photosensor array with 6 photosensors to detect the vertical position of the incident source. An A/D channel with enough channels to detect 18 photosensor input signals is attached.

3. Microcontroller 2, with 10 or more inputs and outputs, 1 serial communication port, 1 reset input, 1 interrupt input and some A/D channels.

4. The passive LCD matrix driver 5 has a serial port that can communicate with the microcontroller. The serial port can drive a large passive liquid crystal panel with three front substrates and 16 rear substrates.

5. The micro keyboard 4 has a mode selection button, an up button, a button and a reset button. One of the five operating modes can be selected by pressing the mode selection button. Press the up key to move the position of the active stripe in the LCD panel up. Press the key to move the activated stripe down. Press the reset button to reset the adaptive sun visor. Resetting the adaptive sun visor will activate the control circuit to restore the sun visor to the default operating mode. In the passive liquid crystal matrix, two sets of pixels based on the output information of the sensor array are activated on the liquid crystal panel.

The mode of operation of this embodiment is as follows:

1. 3 X 3 mode. In this mode, each set of activated pixels consists of 9 pixels in 3 rows and 3 rows. The middle pixel has the maximum darkness, and the darkness of the adjacent 8 pixels is 70% of the darkness of the middle pixel.

2. 4 X 4 mode. In this mode, each set of activated pixels consists of 16 pixels in 4 rows and 4 rows. The center 4 pixels have the maximum darkness, while the adjacent 12 pixels have a darkness of 70% of the middle pixel darkness.

3. 5 X 5 mode. In this mode, each set of activated pixels consists of 25 pixels in 5 rows and 5 rows. The center pixel has the largest darkness, the darkness of 8 adjacent pixels is 80% of the center pixel, and the darkness of the remaining outer pixels is 60% of the center pixel.

4. 6 X 6 mode. In this mode, each set of activated pixels consists of 36 pixels in 6 rows and 6 rows. The 4 center pixels have the maximum darkness, and the darkness of the 12 adjacent pixels is 60% of the center pixel. The darkness of the remaining outer pixels is 60%, 40%, and 20% of the center pixel.

5. 7 X 7 mode. In this mode, each set of activated pixels consists of 49 pixels in 7 rows and 7 rows. The center pixel has the maximum darkness, the darkness of 8 adjacent pixels is 85% of the center pixel, and the darkness of the remaining external pixels is 70%, 55%, 40%, 25% and 10% of the center pixel, the most edged The pixel darkness is 10%.

Embodiment 4: Adaptive sun visor adopting active matrix liquid crystal panel

This embodiment has the following parts:

1. The liquid crystal panel 3 has 32 X 16 pixels controlled by thin film transistors, located at the front and one substrate at the rear.

2. Photosensor array 1, a horizontal photosensor array with 12 photosensors to detect the horizontal position of the incident source, and 6 photosensors to detect the vertical position of the incident source. An A/D channel with sufficient channels to read the input signal from the 18 photosensors is attached.

3. Microcontroller 2, with 10 or more general-purpose inputs and outputs, a serial communication port, a reset input, an interrupt input and some A/D channels.

4. The active LCD matrix driver 5 has a serial port that can communicate with the microcontroller and drive a thin film liquid crystal panel with 32 x 16 pixels and a common back panel.

5. Micro-operation keyboard 4, has a mode selection button, an up button, a button, and a reset button. Press the mode selection button to select one of the 5 operating modes. Press the up key to move the position of the activated pixel group on the LCD panel up. Press the key to move the position of the activated pixel group down. Press the reset button to reset the adaptive sun visor, resetting the adaptive sun visor will activate the circuit to return the sun visor to the home mode. For thin film transistor active matrix liquid crystal panels, the two sets of pixels of the liquid crystal panel will be activated based on the output of the sensor array.

The operation mode of this embodiment is as follows:

1 . 3 X 3 mode, in which each group of activated pixels consists of 9 pixels in 3 rows and 3 rows, the center pixel has the maximum darkness, and the adjacent 8 pixels darkness is 70% of the center pixel.

2. 4 X 4 mode. In this mode, each group of activated pixels consists of 16 pixels in 4 rows and 4 rows, the center 4 pixels have the maximum darkness, and the adjacent 12 pixels have the darkness of 70% of the center pixel.

3. 5 X 5 mode, in which each group of activated pixels consists of 5 pixels in 5 rows and 5 rows. Composition. The center pixel has the maximum darkness, the darkness of the 8 adjacent pixels is 80% of the center patch, and the darkness of the remaining pixels is 60%, 40%, 20% of the center patch. '

4. 6 X 6 mode, in which each group of activated pixels consists of 36 pixels in 6 rows and 6 lines. The 4 center pixels have the maximum darkness and the 12 adjacent pixels have a darkness of 80% of the center pixel, and the remaining external pixels have a darkness of 60%, 40%, and 20% of the center pixel.

5. 7 X 7 mode. In this mode, each group of activated pixels consists of 7 rows of 7 rows and 49 pixels. The center pixel has the greatest darkness. The 8 adjacent pixels have a darkness of 85% of the center pixel. The remaining pixels have a darkness of 70%, 55%, 40%, 25%, and 10% of the center pixel, and the outermost pixel has a darkness of 10% of the center pixel.

As shown in Fig. 4, the adaptive sun visor of the present invention selectively blocks the daylight while not obstructing the field of view in front of the driver, so that the scene in front of the car can be clearly seen. For the traditional sun visor, as shown in Figure 3, while blocking the daylight, it inevitably limits the front view of the driver, making it difficult for the driver to notice the scene in front and pose a safety hazard.

As shown in Fig. 5, the overall working principle and working process of the adaptive sun visor of the present invention are schematically shown.

Claims

Claim

An adaptive sun visor, comprising a microcontroller, a micro keyboard, a light sensor array and a liquid crystal panel, wherein the micro keyboard, the light sensor array and the liquid crystal panel are all connected to the microcontroller, and the liquid crystal panel is composed of a certain number of pixels. It is characterized in that the microcontroller has multiple A/D channels to read the output values of the photosensor array, and the pixels are controlled to be monolithically activated or group activated.

2. The adaptive sun visor according to claim 1, wherein said microcontroller comprises a general purpose input and output, a serial communication port, a reset input, an interrupt input, and an A/D channel.

3. The adaptive sun visor according to claim 1 or 2, wherein the microcontroller has a number of I/O ports, interfaces with the micro keyboard, and drives the liquid crystal panel.

4. The adaptive sun visor of claim 1 wherein the sensor array is comprised of a vertical light sensor array, a horizontal light sensor array, or a combination of both.

5. An adaptive sun visor according to claim 1 or 4, characterized in that said light sensor array is provided with an A/D channel having a plurality of channels for reading its input signal from the light sensor. '

6. The adaptive sun visor according to claim 1 or 4, wherein the sensor array comprises a filter, a photosensitive glass, a cylindrical lens, a one-dimensional photosensor array, and a data connection with the microcontroller The interface circuit that is sent to the microcontroller.

7. The adaptive sun visor according to claim 5, wherein the sensor array comprises a filter, a photosensitive glass, a cylindrical lens, a one-dimensional photosensor array, and is connected to the microcontroller and sends the data to the micro The interface circuit of the controller.

8. The adaptive sun visor according to claim 1, wherein said liquid crystal panel has a passive matrix LCD driver, said passive matrix LCD driver having communication with a microcontroller and driving with three front planes and 16 The serial port of the rear plane LCD panel.

9. The adaptive sun visor according to claim 1, wherein said liquid crystal panel has an active matrix LCD driver, said active matrix LCD driver having communication with a microcontroller and driving a film with a specific pixel The serial port of the LCD and the ordinary back.

10. An adaptive sun visor according to claim 1 or 8 or 9, wherein said pixels of said liquid crystal panel are in a transparent state when not activated and in a translucent state when activated.

11. An adaptive sun visor according to claim 1 or 8 or 9, characterized in that said liquid The bottom layer of the front and back substrates of the crystal plate is laminated glass or plastic.

12. The adaptive sun visor according to claim 10, wherein the bottom layer of the front substrate and the rear substrate of the liquid crystal panel is laminated glass or plastic.

13. The adaptive sun visor according to claim 1, wherein the micro keyboard has a mode selection key, an up key, a down key, and a reset key.