Vehicle display system and operating method thereof

Abstract

The present disclosure provides a display system for a vehicle, characterized by comprising: a display for displaying an image; the directional ambient light sensor is used for detecting light intensity in different directions; and the processor is electrically connected with the display and the directional ambient light sensor.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a display system for vehicle, in particular to a display system for vehicle capable of precisely detecting the light intensity incident to the driver's line of sight and adjusting the image visibility. BACKGROUND

[0002] The ambient light intensity inside the vehicle affects the driver's visibility when reading the display screen or the road condition. The conventional method for improving the strong glare inside the vehicle is to adjust the display screen by detecting the total ambient light intensity at the location of the ambient light sensor.

[0003] However, the ambient light that actually affects the driver is not the total light intensity at the location of the ambient light sensor, but the light intensity incident to the driver's line of sight, especially the strong light from a specific direction, which will affect the driving safety. SUMMARY

[0004] According to an embodiment of the present disclosure, a display system for vehicle is provided, comprising: a display for displaying an image; a directional ambient light sensor for detecting light intensity in different directions; and a processor electrically connected to the display and the directional ambient light sensor.

[0005] According to an embodiment of the present disclosure, a method for operating a display system for vehicle is provided, comprising: detecting light intensity in different directions by a directional ambient light sensor; and receiving, by a processor, the light intensity in different directions provided by the directional ambient light sensor as original light intensity, weighting the original light intensity to obtain weighted light intensity, comparing the weighted light intensity or the sum of the weighted light intensity with corresponding threshold value, and adjusting the visual contrast of the image by a display when one of the weighted light intensity or the sum of the weighted light intensity is equal to or greater than the corresponding threshold value, or the processor does not weight the original light intensity, directly compares the original light intensity with the corresponding threshold value, and adjusts the visual contrast of the image by the display when one of the original light intensity is equal to or greater than the corresponding threshold value.

[0006] According to an embodiment of the present disclosure, a display system for vehicle is provided, comprising: a display for displaying an image; a plurality of directional ambient light sensors surrounding the display for detecting light intensity in different directions; and a processor electrically connected to the display and the directional ambient light sensors. BRIEF DESCRIPTION OF DRAWINGS

[0007] The embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be noted that various component parts are not drawn to scale and are merely intended to illustrate the example. In fact, the size of the elements can be enlarged or reduced to clearly show the technical features of the embodiments of the present disclosure.

[0008] Figure 1 is a simple schematic diagram of a vehicle display system according to an embodiment of the present disclosure;

[0009] Figure 2A is a top view of some components in a vehicle display system according to an embodiment of the present disclosure;

[0010] Figure 2B is Figure 2A a cross-sectional schematic diagram of;

[0011] Figure 3A is a cross-sectional schematic diagram of some components in a vehicle display system according to an embodiment of the present disclosure;

[0012] Figure 3B is a cross-sectional schematic diagram of some components in a vehicle display system according to an embodiment of the present disclosure;

[0013] Figure 4 is a flowchart of a method for operating a vehicle display system according to an embodiment of the present disclosure;

[0014] Figure 5 is a flowchart of a method for operating a vehicle display system according to an embodiment of the present disclosure;

[0015] Figure 6A is a cross-sectional schematic diagram of a display module according to an embodiment of the present disclosure;

[0016] Figure 6B is a cross-sectional schematic diagram of a display module according to an embodiment of the present disclosure;

[0017] Figure 7 is a cross-sectional schematic diagram of a self-luminous display according to an embodiment of the present disclosure;

[0018] Figure 8 is a flowchart of a method for operating a vehicle display system according to an embodiment of the present disclosure;

[0019] Figure 9 is a flowchart of a method for operating a vehicle display system according to an embodiment of the present disclosure;

[0020] Figure 10 is a schematic diagram of a method for operating a vehicle display system according to an embodiment of the present disclosure; and

[0021] Figure 11FIG. 1 is a top view of some components of a vehicle display system according to an embodiment of the present disclosure.

[0022] SYMBOL DESCRIPTION

[0023] 10: vehicle display system

[0024] 11: glass cover plate

[0025] 12: display

[0026] 12a: first display

[0027] 12b: second display

[0028] 14: directional ambient light sensor

[0029] 14a: first directional ambient light sensor

[0030] 14b: second directional ambient light sensor

[0031] 14c: third directional ambient light sensor

[0032] 14d: fourth directional ambient light sensor

[0033] 16: processor

[0034] 18: drive monitoring system

[0035] 20: smart window system

[0036] 22: driver

[0037] 22a: line of sight of driver

[0038] 24: strong glare

[0039] 24a: first incident direction of strong glare

[0040] 24b: second incident direction of strong glare

[0041] 26: obscuration layer

[0042] 28: opening

[0043] 30, 36: light of particular direction

[0044] 32: collimating structure

[0045] 34: oblique opening

[0046] 50: display module

[0047] 52: display

[0048] 54: wide viewing angle backlight

[0049] 54': light of broad view backlight multi-direction

[0050] 56: narrow view (collimated) backlight

[0051] 56': light of narrow view (collimated) backlight specific direction

[0052] 100: self-luminous display

[0053] 102: broad view self-luminous unit

[0054] 102': light of broad view self-luminous unit multi-direction

[0055] 104: narrow view (collimated) self-luminous unit

[0056] 104': light of narrow view (collimated) self-luminous unit specific direction

[0057] D: display region

[0058] Pm: measurement point

[0059] Po: observation point

[0060] R: reflecting surface

[0061] θ1: included angle between driver's line of sight and reflecting surface

[0062] θ2: included angle between first incident direction of strong glare and reflecting surface

[0063] θ2': included angle between second incident direction of strong glare and reflecting surface DETAILED DESCRIPTION

[0064] The following detailed description illustrates by way of example only several embodiments of this application that can be implemented as part of the present application. The purpose of the detailed description is to enable a person skilled in the art to make use and understand the present application. The detailed description is not intended to limit the scope of the present application in any way.

[0065] Certain terms are used throughout the description and claims which have particular meanings as set forth below. The skilled person will appreciate that device manufacturers can use different names for the same component. It is not intended to limit the application to any particular named component. In the following description and claims, the terms "comprise", "include" and "contain" are open-ended terms and, as such, should be interpreted to cover also "consist of, "consist essentially of, and "consist of, but not limited to".

[0066] The directional terms mentioned herein, such as "upper," "lower," "front," "back," "left," "right," and the like, are used with reference to the orientation of the Figures. Accordingly, the directional terms are used for purposes of explanation and not limitation. In the Figures, like elements are depicted with identical numbering throughout the several Figures. The relative dimensions, thicknesses, and locations of various film layers, regions, and / or structures can be exaggerated or shrunk for clarity.

[0067] As used herein, the term "on" or "over" one structure (or layer, component, substrate) in relation to another structure (or layer, component, substrate) means that the two structures are adjacent and directly connected, or that the two structures are adjacent but not directly connected. Not directly connected means that there is at least one intervening structure (or intervening layer, intervening component, intervening substrate, intervening spacing) between the two structures, the lower side surface of one structure is adjacent to or directly connected to the upper side surface of the intervening structure, and the upper side surface of the other structure is adjacent to or directly connected to the lower side surface of the intervening structure. The intervening structure can be a single layer or multiple layers of solid or non-solid structures, without limitation. In the present disclosure, when a structure is disposed "on" another structure, it can mean that the structure is "directly" on the other structure, or that the structure is "indirectly" on the other structure, i.e., there is at least one structure between the structure and the other structure.

[0068] The terms "about," "substantially," or "approximately" generally mean within 10% of a given value or range, or within 5%, 3%, 2%, 1%, or 0.5% of a given value or range.

[0069] Furthermore, any two values or directions used in a comparison can be off by some amount. If a first value is equal to a second value, it is implied that the first value can be off from the second value by about 10%. If a first direction is perpendicular or "approximately" perpendicular to a second direction, the angle between the first direction and the second direction can be between 80 and 100 degrees. If a first direction is parallel or "approximately" parallel to a second direction, the angle between the first direction and the second direction can be between 0 and 10 degrees.

[0070] The use of ordinal terms such as "first," "second," etc., in the specification and claims to modify a claim element does not imply that a sequence or order to the elements must be, or be followed in, the disclosure. Rather, the ordinal terms are used for purposes of distinction among different claim elements, and are not meant to limit the claims in any way. It is also noted that not all of the activities described need to be performed, nor necessarily need they be performed in the order described, nor necessarily need all of the activities described to be performed, to realize the benefits of the disclosure.

[0071] In the present disclosure, the phrase "a given range is from a first value to a second value" or "a given range falls within a range from a first value to a second value" means that the given range includes the first value, the second value, and other values therebetween.

[0072] It should be understood that, according to embodiments of the present disclosure, the depth, thickness, width, or height of each element, or the spacing or distance between elements, can be measured using an optical microscope (OM), a scanning electron microscope (SEM), an alpha-step, an ellipsometer, or other suitable means. According to some embodiments, a cross-sectional structure image including the elements to be measured can be obtained using a scanning electron microscope, and the depth, thickness, width, or height of each element, or the spacing or distance between elements, can be measured.

[0073] The electronic device can include an imaging device, a bonding device, a display device, a backlight device, an antenna device, a tiling device, a touch display, a curved display, or a free shape display, but is not limited thereto. The electronic device can include, for example, a liquid crystal, a light emitting diode, fluorescence, phosphor, other suitable display medium, or a combination thereof, but is not limited thereto. The display device can be a non-self-emissive display device or a self-emissive display device. The antenna device can be a liquid crystal type antenna device or a non-liquid crystal type antenna device, and the sensing device can be a sensing device that senses capacitance, light, heat energy, or ultrasound, but is not limited thereto. The tiling device can be, for example, a display tiling device or an antenna tiling device, but is not limited thereto. It should be noted that the electronic device can be any arrangement combination of the aforementioned, but is not limited thereto. The electronic device can be a bendable or flexible electronic device. It should be noted that the electronic device can be any arrangement combination of the aforementioned, but is not limited thereto. In addition, the electronic device can have a rectangular, circular, polygonal, shape with curved edges, or other suitable shape. The electronic device can have a driving system, a control system, a light source system, a shelf system, and the like, to support the display device, the antenna device, or the tiling device.

[0074] It should be understood that the following embodiments can be replaced, recombined, mixed, and other embodiments can be completed by replacing, recombining, and mixing features in different embodiments without departing from the spirit of the present disclosure. The features of each embodiment can be arbitrarily mixed and used as long as they do not conflict with each other or the spirit of the present disclosure.

[0075] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an overly idealized or overly formal sense unless expressly so defined herein.

[0076] Further, the description and drawings merely preferred embodiments of the disclosure and variations are to be read in this regard with the above limitations and discoveries in mind and the disclosure in its broadest scope can accommodate many changes and modifications without departing from the scope of the before set forth and more particularly set forth.

[0077] Further, the description herein of relative positional relationships between components or steps in a flow diagram using terms such as "forward", "rear", "above", "below", "upper", "lower", "up", "down", "front", "rear", "left", "right", "horizontal" and "vertical" or like terms should be interpreted based on the orientation (i.e., the orientation of the figure) of the figure being referred to rather than based on the orientation of the figure itself, unless otherwise indicated. Terms concerning attachments, such as "connected", "supported", and "coupled", are to be construed as actual physical attachments or coupling between the components, unless otherwise noted.

[0078] Further, the description and drawings merely preferred embodiments of the disclosure and variations are to be read in this regard with the above limitations and discoveries in mind and the disclosure in its broadest scope can accommodate many changes and modifications without departing from the scope of the before set forth and more particularly set forth.

[0079] In the present disclosure, the use of "or" as a conjunction between elements is intended to encompass both "and" and "or" unless otherwise indicated.

[0080] In the present disclosure, when "a certain element is disposed on another element" is intended to mean that the certain element can be disposed on a certain side of the another element, such as but not limited to above, below, left, right, front, or rear, and further, the two elements do not necessarily have to be in contact.

[0081] Referring to Figure 1 , according to an embodiment of the present disclosure, a vehicle display system 10 is provided. Figure 1 FIG. 1 is a simple schematic diagram of a vehicle display system 10.

[0082] As Figure 1As shown, the automotive display system 10 includes a display 12, a directional ambient light sensor 14, and a processor 16. The display 12 is used to display images. The directional ambient light sensor 14 is used to detect the light intensity in different directions. The processor 16 is electrically connected to the display 12 and the directional ambient light sensor 14. For example, the processor 16 receives the light intensity from different directions provided by the directional ambient light sensor 14, processes it appropriately, and then transmits the signal to the display 12 to adjust the visual contrast of the image.

[0083] According to some embodiments, the vehicle display system 10 also includes a driver monitoring system 18, which uses, for example, an eye-tracking sensor or a hand (gesture) sensor to obtain the driver's gaze direction in real time. The signal of the driver's gaze direction provided by the driver monitoring system 18 and the signals of light intensity in different directions provided by the directional ambient light sensor 14 are transmitted together to the processor 16 for signal processing and interpretation.

[0084] According to some embodiments, the automotive display system 10 also includes a smart window system 20 for adjusting window transparency. The processor 16 also transmits relevant signals to the smart window system 20 to adjust the window transparency.

[0085] The following is Figure 2A and 2B Explain the relative positional relationship between the directional ambient light sensor and the display. Figure 2A This is a top view of some components in an automotive display system. Figure 2B for Figure 2A A cross-sectional schematic diagram.

[0086] like Figure 2A and 2B As shown, a first display 12a and a second display 12b are disposed below the glass cover 11, along with a plurality of directional ambient light sensors (e.g., a first directional ambient light sensor 14a, a second directional ambient light sensor 14b, a third directional ambient light sensor 14c, and a fourth directional ambient light sensor 14d). According to some embodiments, the directional ambient light sensors are disposed adjacent to the side, inside, above, or below the displays, but are not limited thereto. For example, as... Figure 2A As shown, the first directional ambient light sensor 14a is disposed between the first display 12a and the second display 12b, adjacent to the sides of the first display 12a and the second display 12b. The second directional ambient light sensor 14b is disposed inside the second display 12b. The third directional ambient light sensor 14c is disposed below the second display 12b. The fourth directional ambient light sensor 14d is disposed adjacent to the side of the second display 12b.

[0087] according to Figure 2AFurther, for example, with respect to the display region D on the first display 12a, the line-of-sight direction 22a of the driver 22 and the first incident direction 24a of the strong glare light 24 (having a certain direction) substantially exhibit a mirror-symmetrical relationship, that is, the angle θ1 between the line-of-sight direction 22a of the driver 22 and the reflective surface R is equal to the angle θ2 between the first incident direction 24a of the strong glare light 24 and the reflective surface R. In addition, according to some embodiments, when there is a positional deviation between the observation point of the driver and the measurement point of the sensor, a correction value can be considered when evaluating the angle of the incident direction of the strong glare light. For example, when there is a positional deviation between the observation point Po of the driver 22 (the line-of-sight position of the driver 22 on the first display 12a) and the measurement point Pm of the first directional ambient light sensor 14a (the position of the first directional ambient light sensor 14a), a correction value δ can be considered when evaluating the angle of the incident direction of the strong glare light 24, for example, θ2' = θ1 + δ, to obtain the second incident direction 24b of the strong glare light 24 after correction, where θ2' is the angle between the second incident direction 24b of the strong glare light 24 and the reflective surface R.

[0088] The following describes the types of directional ambient light sensors.

[0089] According to some embodiments, the directional ambient light sensor receives light from each direction and can detect the light intensity corresponding to each direction.

[0090] According to some embodiments, the directional ambient light sensor receives light from a certain direction, and the received light intensity is the light intensity corresponding to the certain direction. At this time, the directional ambient light sensor can detect the light intensity corresponding to the certain direction. The structure of such a directional ambient light sensor is shown in Figure 3A and 3B . Figure 3A and 3B are cross-sectional schematic diagrams of some elements in a vehicle display system.

[0091] Referring to Figure 3A , a shielding layer 26 is arranged below the glass cover plate 11. The shielding layer 26 overlaps the directional ambient light sensor 14 in the vertical direction, that is, in the normal angle direction, the shielding layer 26 completely blocks the directional ambient light sensor 14. In the figure, the shielding layer 26 is formed with an opening 28 in the inclined direction relative to the directional ambient light sensor 14, and the directional ambient light sensor 14 receives light 30 from a certain direction through the opening 28. According to some embodiments, the shielding layer 26 includes, for example, ink, a metal layer, or a light-blocking material, but is not limited thereto.

[0092] Referring to Figure 3BA collimating structure 32 is disposed around the directional ambient light sensor 14 to form a slanted opening 34, so that the directional ambient light sensor 14 receives light 36 from a specific direction via the slanted opening 34.

[0093] According to some embodiments, the directional ambient light sensor is disposed on a rotatable base (not shown) that rotates the directional ambient light sensor mechanically to receive light from a specific direction and detect the light intensity corresponding to the specific direction.

[0094] In some embodiments, the light from the specific direction can be a glare that interferes with driving, for example, a strong ambient light that is incident on the display and then reflected to the human eye within a viewing angle range 120°, but not limited thereto.

[0095] Referring to Figure 1 , the operation method of the display system 10 for vehicles is further described.

[0096] According to some embodiments, as shown in Figure 1 , first, the directional ambient light sensor 14 detects light intensity from different directions. Then, the processor 16 receives the light intensity from different directions provided by the directional ambient light sensor 14 and performs numerical processing. For example, the received light intensity from different directions is taken as original light intensity, and the original light intensity is weighted to obtain weighted light intensity. Then, the weighted light intensity or the sum of the weighted light intensity is compared with the corresponding threshold value, and when one of the weighted light intensity or the sum of the weighted light intensity is equal to or greater than the corresponding threshold value, an adjustment signal is transmitted to the display 12. Then, the display 12 adjusts the visual contrast of the image.

[0097] According to some embodiments, the detailed process performed by the processor 16 is described below using the weighting table 1 (Table 1 below).

[0098] Table 1

[0099]

[0100] The polar angle (θ) is in the range of greater than or equal to 0 degrees to less than or equal to 90 degrees. The plane angle is in the range of greater than or equal to 0 degrees to less than or equal to 360 degrees. The direction of incident light can be determined by the polar angle (θ) and the plane angle . For example, in Table 1, the incident light with a polar angle (θ) of 0 degrees and a plane angle of 180 degrees, and the incident light with a polar angle (θ) of 20 degrees and a plane angle of 180 degrees, is light from the left for driving. The incident light with a polar angle (θ) of 0 degrees and a plane angle 90 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 90 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 0 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 0 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 90 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 0 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 90 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 0 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle 0 degrees for the incident light, and polar angle (θ) is 20 degrees, plane angle

[0101] According to some embodiments, the following illustrates the detailed flow of the processor 16 in terms of the weighting table 2 (Table 2 below).

[0102] Table 2

[0103]

[0104] In Table 2, polar angle (θ) is 60 degrees, plane angle for 180 degree incident light and polar angle (θ) of 40 degrees, plane angle for 180 degree incident light and polar angle (θ) of 20 degrees, plane angle for 180 degree incident light and polar angle (θ) of 20 degrees, plane angle for 0 degree incident light and polar angle (θ) of 20 degrees, plane angle for 0 degree incident light and polar angle (θ) of 40 degrees, plane angle for 0 degree incident light and polar angle (θ) of 60 degrees, plane angle for 0 degree incident light and polar angle (θ) of 60 degrees, plane angle for 0 degree incident light and polar angle (θ) of 60 degrees, plane angle

[0105] According to some embodiments, the following illustrates the detailed flow executed by the processor 16 in the weighting table 3 (Table 3 below).

[0106] Table 3

[0107]

[0108] for 180 degree incident light and polar angle (θ) of 40 degrees, plane angle for 180 degree incident light and polar angle (θ) of 20 degrees, plane angle for 180 degree incident light and polar angle (θ) of 20 degrees, plane angle for 180 degree incident light and polar angle (θ) of 20 degrees, plane angle The incident light is at 0 degrees, the polar angle (θ) is 20 degrees, and the plane angle is... The incident light is at 0 degrees, the polar angle (θ) is 40 degrees, and the plane angle is... An incident light beam with an angle of 0 degrees and a polar angle (θ) of 60 degrees, and a plane angle The incident light is 0 degrees, which is considered right-hand light for driving. Here, the original light intensities of the left-hand light are 400, 500, and 400 respectively. The original light intensities of the right-hand light are 300, 100, 50, and 40 respectively. It was assessed that the left-hand light affects driving less than the right-hand light; therefore, it is given a lower weighting of 0.1. For the right-hand light, specifically, the polar angle (θ) is 40 degrees, and the plane angle... The right-hand light, at 0 degrees, has the most significant impact on driving; therefore, it is given a higher weighting of 1.0. Here, the processor increases the weighting of light intensity for specific directions (the incident light directions most likely to interfere with driving). The weighted light intensities obtained after weighting the original light intensity of the left-hand light are 40, 50, and 40, respectively. The weighted light intensities obtained after weighting the original light intensity of the right-hand light are 60, 50, 50, and 20, respectively. The threshold for each light source in Table 3 is set to 100. Comparing the weighted light intensities with the corresponding thresholds reveals that although the weighted light intensities of each light source are all less than their corresponding thresholds, the sum of the weighted light intensities is greater than the corresponding thresholds. This indicates that although the individual incident light intensities from these directions do not interfere with the driver's vision, the combined effect of each light source is sufficient to interfere with the driver's vision, requiring further adjustment of the image's visual contrast by the display 12. In the embodiments shown in Table 3, when the sum of the weighted light intensities is equal to or greater than the corresponding threshold, the adjustment signal is transmitted to the display 12 to adjust the visual contrast of the image.

[0109] According to some embodiments, such as Figure 1 As shown, firstly, a directional ambient light sensor 14 detects the light intensity in different directions. Then, a processor 16 receives the light intensity data from the directional ambient light sensor 14 and performs numerical processing. For example, the received light intensities from different directions are used as the raw light intensity. At this point, the processor 16 does not weight the raw light intensity but directly compares it with a corresponding threshold. When the raw light intensity is equal to or greater than the corresponding threshold, an adjustment signal is transmitted to the display 12. Then, the display 12 adjusts the visual contrast of the image.

[0110] Based on some embodiments, the detailed flow of execution by processor 16 is described below in weighted table 4 (Table 4 below).

[0111] Table 4

[0112]

[0113] Table 4, the polar angle (θ) is 60 degrees, the plane angle is 180 degrees, the polar angle (θ) is 40 degrees, the plane angle is 180 degrees, and the polar angle (θ) is 20 degrees, the plane angle is 180 degrees, and is the left light for driving. The polar angle (θ) is 0 degree, the plane angle is 0 degree, the polar angle (θ) is 20 degrees, the plane angle is 0 degree, the polar angle (θ) is 40 degrees, the plane angle is 0 degree, and the polar angle (θ) is 60 degrees, the plane angle is 0 degree, and is the right light for driving. Here, the original light intensity of the left light is all 80. The original light intensity of the right light is all 80. After evaluation, the polar angle (θ) is 40 degrees, the plane angle is 0 degree, the right light has the most severe impact on driving, and thus, the corresponding threshold value is adjusted. Here, the processor reduces the corresponding threshold value for the light intensity of a specific direction (the direction of the incident light that is most likely to interfere with driving). In Table 4, the threshold value of the right light with the polar angle (θ) of 40 degrees and the plane angle of 0 degree is set to 50, and the threshold values of the other lights are all set to 100. After directly comparing the original light intensity with the corresponding threshold value, it is found that, because the threshold value of the right light with the polar angle (θ) of 40 degrees and the plane angle of 0 degree has been adjusted to 50, the original light intensity of this direction is greater than the corresponding threshold value, which means that the intensity of the incident light of this direction has reached the degree of interfering with the driver's vision, and the visual contrast of the image needs to be further adjusted by the display 12. In the embodiment shown in Table 4, when one of the original light intensities is equal to or greater than the corresponding threshold value, an adjustment signal is transmitted to the display 12 to adjust the visual contrast of the image.

[0114] According to the embodiments shown in Tables 1-4, when one of the weighted light intensities or the sum of the weighted light intensities is equal to or greater than the corresponding threshold value, or when one of the original light intensities is equal to or greater than the corresponding threshold value (in the unweighted case), an adjustment signal is transmitted to the display to adjust the visual contrast of the image. The features of the present disclosure are further illustrated in the flowchart shown below. Figure 4 5

[0115] As Figure 4 ​​As shown, first, ambient light intensity is detected, and the light intensity can correspond to at least one direction. Then, it is determined whether the light intensity is higher than a preset threshold. If the light intensity is higher than the preset threshold, the display image is adjusted to a first state. The visual contrast of the first state is greater than the original state. If the light intensity is lower than the preset threshold, the display maintains the original state.

[0116] As shown, first, at least one light path that can cause glare to the driver is preset. Then, ambient light intensity is detected, which includes at least one light intensity that can correspond to the light path. Next, it is determined whether the light intensity is higher than a preset threshold. If the light intensity is higher than the preset threshold, the display image is adjusted to a first state. The visual contrast of the first state is greater than the original state. If the light intensity is lower than the preset threshold, the display maintains the original state. Figure 5

[0117] The following describes a method of adjusting the visual contrast of a display image.

[0118] Visual contrast, or effective contrast, refers to the visuality of an image that is actually perceived by the human eye, for example, taking into account the reflected light of ambient light to the display surface, and thus the visual contrast can be represented as 1+(display light intensity / reflected light intensity). In some cases, the resolution, sharpness, and picture update frequency of the display image can affect the visual contrast, but are not limited thereto. For example, when the visual contrast of the display before adjustment is less than the contrast that can be comfortably observed by the human eye, adjustment is performed so that the visual contrast after adjustment is greater than the visual contrast before adjustment. The contrast that can be comfortably observed by the human eye can be a threshold value in the present disclosure, for example, can be 500, 250, 100, or other contrast greater than 2. For example, the visual contrast after adjustment can be increased by 5% or more than 10% compared to the visual contrast before adjustment.

[0119] Visual contrast is defined as follows:

[0120] Visual contrast = 1+(display brightness / ambient light reflection brightness)

[0121] The method of adjusting the visual contrast of a display image includes, for example, increasing the display brightness, reducing the ambient light reflectivity, reducing the brightness of ambient light reflected to the human eye, or adjusting the transparency of the vehicle window, but is not limited thereto.

[0122] ​According to some embodiments, the method of increasing display brightness includes, but is not limited to, increasing global backlight brightness, increasing local backlight brightness, increasing self-emitting unit brightness, increasing transparency of elements (e.g., light shutter) disposed between display and backlight, increasing pulse-width modulation (PWM) driving frequency, or increasing pulse-amplitude modulation (PAM) driving frequency.

[0123] According to some embodiments, the method of decreasing ambient light reflectivity includes, but is not limited to, increasing display surface haze (e.g., attaching polymer dispersed liquid crystal (PDLC) film) or decreasing transparency of elements (e.g., light shutter) disposed on display.

[0124] According to some embodiments, the method of decreasing ambient light reflectivity to human eye brightness includes, but is not limited to, adjusting display surface angle (e.g., setting mechanical structure) or moving display position.

[0125] According to some embodiments, the method of adjusting vehicle window transparency includes, but is not limited to, using light shutter glass, curtain, or blind. According to some embodiments, materials that can be used as light shutter glass include, but are not limited to, dichroic dye liquid crystal (DDLC), polymer dispersed liquid crystal (PDLC), polymer network liquid crystal (PNLC), cholesteric liquid crystal (CLC), electrochromic (EC) material, suspended particle device (SPD) color-changing material, electronic ink, or photochromic (PC) material.

[0126] The following describes how to increase global backlight brightness by setting upper and lower backlights, in which Figure 6A The following describes how to increase local backlight brightness. 6B The following describes how to increase local backlight brightness. Figure 6A The following describes how to increase global backlight brightness. Figure 6B The following describes how to increase local backlight brightness. Figure 6A The following describes how to increase global backlight brightness. 6B The following describes how to increase local backlight brightness.

[0127] The following describes how to increase global backlight brightness. Figure 6A, the display module 50 includes a display 52, a wide viewing angle backlight 54 (which can emit multi-directional light 54'), and a narrow viewing angle (collimated) backlight 56 (which can emit directional light 56'). The wide viewing angle backlight 54 is disposed below the display 52. The narrow viewing angle (collimated) backlight 56 is disposed between the display 52 and the wide viewing angle backlight 54. When strong glare simultaneously interferes with the line of sight of both the driver and the front passenger, the display module 50 can selectively turn on and enhance the wide viewing angle backlight 54, while temporarily turning off the narrow viewing angle (collimated) backlight 56, to increase the overall backlight brightness, thereby achieving simultaneous improvement in the visual contrast of the viewing image for both the driver and the front passenger.

[0128] Please refer to Figure 6B When strong glare only interferes with the line of sight of one of the driver or the front passenger, the display module 50 can selectively turn on and enhance the narrow viewing angle (collimated) backlight 56, while temporarily turning off the wide viewing angle backlight 54, to increase the regional backlight brightness. For example, when strong glare only interferes with the line of sight of the front passenger but not the driver, in order to maintain the stability of the viewing image for the driver, the display module 50 can selectively turn on and enhance the narrow viewing angle (collimated) backlight 56 (intensify the display light directed to the front passenger), while temporarily turning off the wide viewing angle backlight 54, which can individually improve the visual contrast of the viewing image for the front passenger without affecting the viewing quality of the driver.

[0129] The following is a cross-sectional view of Figure 7 Further description of how to increase the brightness of the self-luminous unit by the arrangement of two self-luminous units, including how to increase the overall brightness of the self-luminous unit, and how to increase the regional brightness of the self-luminous unit. Figure 7 is a cross-sectional view of the self-luminous display 100.

[0130] Please refer to Figure 7 The self-luminous display 100 includes a wide viewing angle self-luminous unit 102 (which can emit multi-directional light 102') and a narrow viewing angle (collimated) self-luminous unit 104 (which can emit directional light 104'). When strong glare simultaneously interferes with the line of sight of both the driver and the front passenger, the self-luminous display 100 can selectively turn on and enhance the wide viewing angle self-luminous unit 102, while temporarily turning off the narrow viewing angle (collimated) self-luminous unit 104, to increase the overall brightness of the self-luminous unit, thereby achieving simultaneous improvement in the visual contrast of the viewing image for both the driver and the front passenger.

[0131] When strong glare only interferes with the vision of either the driver or the passenger, the self-emissive display 100 can selectively activate and enhance the narrow-viewing-angle (collimating) self-emissive unit 104, while temporarily deactivating the wide-viewing-angle self-emissive unit 102, to increase the brightness of the regional self-emissive units. For example, when strong glare only interferes with the passenger's vision but not the driver's vision, to maintain the stability of the view for the driver, the self-emissive display 100 can selectively activate and enhance the narrow-viewing-angle (collimating) self-emissive unit 104 (intensifying the display light directed at the passenger), while temporarily deactivating the wide-viewing-angle self-emissive unit 102. This can improve the visual contrast of the view for the passenger without affecting the viewing quality for the driver.

[0132] The following is Figure 8 The flowchart shown further illustrates that after the display image is adjusted to the first state due to the ambient brightness being higher than the threshold, when the driving state or environmental state meets the adaptation conditions, the display can choose to cancel the adjustment of the visual contrast (restore the first state to the original state).

[0133] like Figure 8 As shown, firstly, the ambient brightness is detected (each ambient brightness corresponds to a different light source angle). Then, it is determined whether the ambient brightness exceeds a threshold. If the ambient brightness exceeds the threshold, the display image contrast is adjusted to a first state or the window transparency is adjusted to a first state (the visual contrast of the first state is greater than the original state). The driving state or environmental state is constantly monitored. During the process, it is determined whether the driving state or environmental state meets the adaptation conditions. According to some embodiments, adaptation conditions include, for example, a driver's pupil dilation ratio of 50% or entering the environment for a preset time (e.g., 30 seconds, 1 minute, etc.), but are not limited to these. If the driving state or environmental state meets the adaptation conditions, the display image contrast is adjusted to the original state or the window transparency is adjusted to the original state.

[0134] The following is Figure 9 The flowchart shown further illustrates that after the display image is adjusted to the first state due to the ambient brightness being higher than the first threshold, when the driving state or environmental state meets the adaptation conditions and the ambient brightness is lower than the second threshold (since the driver will adapt to the environment over time, the second threshold is higher than the first threshold), the display can choose to cancel the adjustment of the visual contrast (restoring the first state to the original state).

[0135] like Figure 9As shown, firstly, the ambient brightness is detected (each ambient brightness corresponds to a different light source angle). Then, it is determined whether the ambient brightness is higher than a first threshold. If the ambient brightness is higher than the first threshold, the display image contrast is adjusted to a first state or the window transparency is adjusted to a first state (the visual contrast of the first state is greater than the original state). The driving state or environmental state is constantly monitored. During the process, it is determined whether the driving state or environmental state meets the adaptation conditions. According to some embodiments, adaptation conditions include, for example, a driver's pupil dilation ratio of 50% or entering the environment for a preset time (e.g., 30 seconds, 1 minute, etc.), but are not limited to these. If the driving state or environmental state meets the adaptation conditions and the ambient brightness begins to fall below a second threshold (since the driver adapts to the environment over time, the second threshold is higher than the first threshold), the display image contrast is adjusted to the original state or the window transparency is adjusted to the original state.

[0136] The following is Figure 10 This further explains the relationship between the first threshold, the second threshold, and the transformation between the original state and the first state.

[0137] like Figure 10 As shown, when the ambient brightness is below a first threshold, the display image remains in its original state. Once the ambient brightness exceeds the first threshold, the display image contrast is adjusted to the first state or the window transparency is adjusted to the first state (the visible contrast of the first state is greater than that of the original state). When the ambient brightness begins to fall below a set second threshold (since the driver adapts to the environment over time, the second threshold is higher than the first threshold), the display image contrast is adjusted back to the original state or the window transparency is adjusted back to the original state.

[0138] According to some embodiments, Figure 11 Explain the relative positional relationship between the directional ambient light sensor and the display. Figure 11 This is a top view of some components in an automotive display system (the processor that electrically connects the display to the directional ambient light sensor is not shown in the figure).

[0139] like Figure 11 As shown, a display 12 for displaying images and multiple directional ambient light sensors 14 for detecting light intensity from different directions are disposed below the glass cover 11. It should be noted that the multiple directional ambient light sensors 14 surround the display 12. The positions of each directional ambient light sensor 14 correspond to the angles at which the driver is most likely to receive strong glare.

[0140] The components of some of the embodiments described above are provided to enable those skilled in the art to better understand the viewpoints of the embodiments described herein. Those skilled in the art should understand that they can design or modify other processes and structures based on the embodiments described herein to achieve the same purpose and / or advantages as the embodiments described herein. Those skilled in the art should also understand that such equivalent structures do not depart from the spirit and scope of this disclosure, and that they can make various changes, substitutions, and replacements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the appended claims. Furthermore, although this disclosure has been described above with reference to several preferred embodiments, it is not intended to limit this disclosure.

[0141] References to features, advantages, or similar language throughout this specification are not intended to imply that all features and advantages achievable using this disclosure should or may be implemented in any single embodiment of this disclosure. Rather, language relating to features and advantages is to be understood as meaning that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of this disclosure. Thus, the discussion of features and advantages, as well as similar language, throughout this specification may, but does not necessarily, represent the same embodiments.

[0142] Furthermore, in one or more embodiments, the features, advantages, and characteristics described in this disclosure may be combined in any suitable manner. Based on the description herein, those skilled in the art will recognize that this disclosure may be implemented without one or more specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be identified in certain embodiments that may not be present in all embodiments of this disclosure.

Claims

1. A display system for a vehicle, characterized by comprising: A display for displaying an image; a directional ambient light sensor for detecting light intensity from different directions; and a processor electrically connected to the display and the directional ambient light sensor.

2. The display system of claim 1, wherein the directional ambient light sensor is disposed adjacent to a side, inside, above, or below the display.

3. The display system of claim 1, wherein the directional ambient light sensor receives light from a specific direction.

4. The display system of claim 1, further comprising a narrow viewing angle backlight and a wide viewing angle backlight disposed below the display, wherein the narrow viewing angle backlight and the wide viewing angle backlight are selectively turned on to provide light to the display.

5. The display system of claim 1, wherein when the display is a self-emitting display, the display comprises a narrow viewing angle light emitting unit and a wide viewing angle light emitting unit.

6. The display system of claim 1, wherein the directional ambient light sensor is a plurality of directional ambient light sensors. detecting light intensity from different directions with a directional ambient light sensor; and 7. A method of operating a vehicle display system, the method comprising: receiving the light intensity from different directions provided by the directional ambient light sensor with a processor, generating a plurality of raw light intensities, weighting the raw light intensities to obtain a plurality of weighted light intensities, comparing the weighted light intensities or a sum of the weighted light intensities to corresponding thresholds, and adjusting the display image to a first state when one of the weighted light intensities or the sum of the weighted light intensities is equal to or greater than the corresponding threshold, or the processor does not weight the raw light intensities, directly compares the raw light intensities to corresponding thresholds, and adjusts the display image to a first state when one of the raw light intensities is equal to or greater than the corresponding threshold, wherein the first state has a higher visual contrast than an original state.

8. The method of claim 7, wherein the processor increases a weighting proportion for light intensity from a direction of incident light that is more likely to interfere with driving.

9. The method of claim 7, wherein the processor decreases a corresponding threshold for light intensity from a direction of incident light that is more likely to interfere with driving.

10. The method of claim 7, wherein after the display image is adjusted to the first state, the display image is adjusted back to the original state when a driving condition or an environmental condition meets an accommodation condition. ​ ​ ​

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