Head-up display system and vehicle-mounted system

Abstract

The invention provides a head-up display system and a vehicle-mounted system. The head-up display system includes a display and a projection screen. The display displays a first figure. The projection screen is disposed adjacent to the display and configured to project the first drawing thereon to form a second drawing. The display includes a first region adjacent to the projection screen and a second region remote from the projection screen. The projection screen includes a third region adjacent to the display and a fourth region away from the display. When the display displays the first drawing, the brightness difference between the first area and the second area is greater than the brightness difference between the third area and the fourth area.

Description

Technical Field

[0001] The present disclosure relates to a head-up display system and a vehicle-mounted system. Background Art

[0002] The automotive projection head-up display system can reduce the risk of driver distraction while driving, and has the advantages of small size and large projection range. However, the current automotive projection head-up display system has some problems to be solved, such as regional brightness difference or regional color difference in the attached figure, which has a negative impact on the driving experience. Summary of the invention

[0003] The present disclosure provides a head-up display system and a vehicle-mounted system, which can enhance driving experience.

[0004] According to some embodiments of the present disclosure, a head-up display system includes a display and a projection screen. The display is used to display a first figure. The projection screen is disposed adjacent to the display and is used to project the first figure onto the projection screen to form a second figure. The display includes a first area adjacent to the projection screen and a second area away from the projection screen. The projection screen includes a third area adjacent to the display and a fourth area away from the display. When the display displays the first figure, the brightness difference between the first area and the second area is greater than the brightness difference between the third area and the fourth area.

[0005] According to other embodiments of the present disclosure, a vehicle-mounted system adjacent to a driver's seat includes a display and a windshield. The display is used to display a first figure. The windshield includes a projection screen disposed adjacent to the display and used to project the first figure onto it to form a second figure. The display is disposed between the driver's seat and the projection screen and includes a first area adjacent to the driver's seat and a second area away from the driver's seat. The projection screen includes a third area adjacent to the driver's seat and a fourth area away from the driver's seat. When the display displays the first figure, the brightness difference between the first area and the second area is greater than the brightness difference between the third area and the fourth area.

[0006] According to some other embodiments of the present disclosure, a vehicle-mounted system adjacent to a driver's seat includes a display and a windshield. The display is used to display a first figure. The windshield includes a projection screen disposed adjacent to the display and used to project the first figure onto it to form a second figure. The display is disposed between the driver's seat and the projection screen and includes a first area adjacent to the driver's seat and a second area away from the driver's seat. The projection screen includes a third area adjacent to the driver's seat and a fourth area away from the driver's seat. When the display displays the first figure, the chromaticity difference between the first area and the second area is greater than the chromaticity difference between the third area and the fourth area.

[0007] In order to make the above features and advantages of the present disclosure more obvious and understandable, embodiments are given below with reference to the accompanying drawings for detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of a head-up display system according to some embodiments of the present disclosure;

[0009] Figure 2 is a side view of a head-up display system according to some embodiments of the present disclosure;

[0010] Figures 3 to 5 Exploded views of three types of displays applicable to the embodiments of the present disclosure;

[0011] Figures 6 to 9 They are partial cross-sectional schematic diagrams of three types of displays applicable to the embodiments of the present disclosure;

[0012] Figures 10 to 12 They are schematic diagrams of three vehicle-mounted systems according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0013] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0014] Certain words are used throughout the present disclosure and in the appended claims to refer to specific components. It should be understood by those skilled in the art that electronic device manufacturers may refer to the same components by different names. This document does not intend to distinguish between components that have the same function but different names. In the following description and claims, the words "including" and "comprising" are open-ended words and should therefore be interpreted as "including but not limited to..."

[0015] Directional terms mentioned herein, such as "up", "down", "front", "back", "left", "right", etc., are only with reference to the directions of the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the present disclosure. In the accompanying drawings, each figure shows the general characteristics of the methods, structures and / or materials used in a particular embodiment. However, these drawings should not be interpreted as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative size, thickness and position of each film layer, region and / or structure may be reduced or enlarged.

[0016] A structure (or layer, element, substrate) described in the present disclosure is located on / above another structure (or layer, element, substrate), which may refer to the two structures being adjacent and directly connected, or it may refer to the two structures being adjacent but not directly connected. Indirect connection means that there is at least one intermediate structure (or intermediate layer, intermediate element, intermediate substrate, intermediate interval) between the two structures, the lower surface of one structure is adjacent to or directly connected to the upper surface of the intermediate structure, and the upper surface of the other structure is adjacent to or directly connected to the lower surface of the intermediate structure. The intermediate structure can be composed of a single-layer or multi-layer physical structure or a non-physical structure, without limitation. In the present disclosure, when a certain structure is disposed "on" another structure, it may refer to that the certain structure is "directly" on the other structure, or that the certain structure is "indirectly" on the other structure, that is, at least one structure is sandwiched between the certain structure and the other structure.

[0017] The terms "approximately", "substantially" or "approximately" are generally interpreted as within 10% of a given value or range, or as within 5%, 3%, 2%, 1% or 0.5% of a given value or range. Ordinal numbers such as "first", "second", etc. used in the specification and claims are used to modify elements, and do not themselves imply or represent any previous ordinal numbers of the (or those) elements, nor do they represent the order of one element to another element, or the order of the manufacturing method. The use of these ordinals is only used to make a component with a certain name clearly distinguishable from another component with the same name. The same words may not be used in the claims and the specification, and accordingly, the first component in the specification may be the second component in the claims.

[0018] The electrical connection or coupling described in the present disclosure may refer to direct connection or indirect connection. In the case of direct connection, the endpoints of the components on the two circuits are directly connected or connected to each other by a conductor segment, and in the case of indirect connection, there is a switch, diode, capacitor, inductor, resistor, other suitable components, or a combination of the above components between the endpoints of the components on the two circuits, but it is not limited to these.

[0019] In the present disclosure, the thickness, length and width can be measured by using an optical microscope (OM), and the thickness or width can be measured by the cross-sectional drawing in the electron microscope, but it is not limited to this. In addition, any two values ​​or directions used for comparison may have a certain error. In addition, the terms "a given range is from a first value to a second value", "a given range falls within the range from a first value to a second value" or "a given range is between a first value and a second value" indicate that the given range includes the first value, the second value and other values ​​therebetween. If the first direction is perpendicular to the second direction, the angle between the first direction and the second direction may be between 80 degrees and 100 degrees; if the first direction is parallel to the second direction, the angle between the first direction and the second direction may be between 0 degrees and 10 degrees.

[0020] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as commonly understood by those skilled in the art to which the present disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present disclosure, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the embodiments of the present disclosure.

[0021] In the present disclosure, the electronic device may include a display device, a backlight device, an antenna device, a sensing device or a splicing device, but is not limited thereto. The electronic device may be a bendable or flexible electronic device. The display device may be a non-self-luminous display device or a self-luminous display device. The display device may, for example, include liquid crystal, light-emitting diode, fluorescence, phosphor, quantum dot (QD), other suitable display media or a combination of the foregoing. The antenna device may, for example, include a frequency selective surface (FSS), a radio frequency filter, a polarizer, a resonator or an antenna, etc. The antenna may be a liquid crystal antenna or a non-liquid crystal antenna. The sensing device may be a sensing device for sensing capacitance, light, heat or ultrasound, but is not limited thereto. In the present disclosure, the electronic device may include electronic components, and the electronic components may include passive components and active components, such as capacitors, resistors, inductors, diodes, transistors, etc. The diode may include a light-emitting diode or a photodiode. The light emitting diode may include, for example, an organic light emitting diode (OLED), a sub-millimeter light emitting diode (mini LED), a micro LED or a quantum dot light emitting diode (quantum dotLED), but is not limited thereto. The splicing device may be, for example, a display splicing device or an antenna splicing device, but is not limited thereto. It should be noted that the electronic device may be any arrangement or combination of the foregoing, but is not limited thereto. In addition, the appearance of the electronic device may be rectangular, circular, polygonal, a shape with curved edges or other suitable shapes. The electronic device may have peripheral systems such as a drive system, a control system, a light source system, etc. to support a display device, an antenna device, a wearable device (for example, including augmented reality or virtual reality), a vehicle-mounted device (for example, including a car windshield) or a splicing device.

[0022] It should be noted that the following embodiments may replace, reorganize, or mix features in several different embodiments to complete other embodiments without departing from the spirit of the present disclosure. Features between embodiments may be mixed and matched as long as they do not violate the spirit of the invention or conflict with each other.

[0023] In the embodiments disclosed herein, the head-up display system can be used in a vehicle, and the head-up display system can be integrated with the system in the vehicle into a vehicle-mounted system, but is not limited thereto. The type of vehicle is not limited. In terms of power, the vehicle can be a fuel vehicle (such as a gasoline vehicle or a diesel vehicle), a hybrid vehicle, or an electric vehicle, but is not limited thereto. An electric vehicle can have more storage space than a fuel vehicle and a hybrid vehicle. In terms of appearance or function, the vehicle can be a sedan, a SUV, a sports car, a truck, a bus, a military vehicle, a racing car, a special vehicle, an engineering vehicle, or a camper, but is not limited thereto. The head-up display system can be used to project a picture light with display information onto a projection screen, and the light is transmitted to the driver's eyes through reflection from the projection screen, allowing the driver to see an enlarged virtual image of the corresponding display information in front of him.

[0024] Figure 1 is a schematic diagram of a head-up display system according to some embodiments of the present disclosure. Figure 1 , the head-up display system 1 may include a display 10 and a projection screen 12. The display 10 is used to display a first figure. The projection screen 12 is disposed adjacent to the display 10 and is used to project the first figure onto it to form a second figure. The display 10 includes a first area R1 adjacent to the projection screen 12 and a second area R2 away from the projection screen. The projection screen 12 includes a third area R3 adjacent to the display 10 and a fourth area R4 away from the display 10. When the display 10 displays the first figure, the brightness difference between the first area R1 and the second area R2 is greater than the brightness difference between the third area R3 and the fourth area R4.

[0025] In detail, the display 10 may include a liquid crystal display (liquid crystal), a light emitting diode display (light emitting diode, LED), an organic light emitting diode display (organic light emitting diode, OLED), a fluorescence display, a phosphor display, a digital light processing (Digital Light Processing, DLP) projector, a liquid crystal on silicon (Liquid Crystal On Silicon, LCoS) display, a laser scanning system, or any combination thereof, but not limited thereto. The liquid crystal display may include a thin film transistor display, but not limited thereto. The digital light processing projector may include a digital micromirror device (Digital Micromirror Device, DMD), but not limited thereto. The light emitting diode may, for example, include an organic light emitting diode (organic light emitting diode, OLED), an inorganic light emitting diode (inorganic light-emitting diode), a sub-millimeter light emitting diode (mini LED), a micro LED, or a quantum dot (quantum dot, QD) light emitting diode (QLED, QDLED) or other suitable materials or any combination thereof, but not limited thereto. In addition, the display 10 may be in a rectangular, circular, polygonal, a shape with curved edges, or other suitable shapes.

[0026] The projection screen 12 may be selected from one of the elements of the windshield. For example, although not shown, the windshield may include one or more elements of a glass structure, a heat insulation layer, a light shielding layer dimming structure, an anti-reflection layer, and a baffle, and the glass structure or the baffle may be used as the projection screen 12, but is not limited thereto.

[0027] The glass structure may include single-layer glass or multiple layers (such as double-layer) glass. If the glass structure includes multiple layers of glass, the glass structure may further include an adhesive layer disposed between the multiple layers of glass. The material of the adhesive layer may include, for example, polyvinyl butyral (PVB), but is not limited thereto. The heat-insulating layer may be disposed on the outer surface of the glass structure (i.e., the surface of the glass structure facing the outside of the vehicle) and, for example, may fully cover the outer surface to achieve a heat-insulating effect by reducing the transmittance of ambient light. The shading layer may be disposed on at least one of the outer surface and the inner surface (i.e., the surface facing the outside of the vehicle) of the glass structure and, for example, may partially cover the at least one of the surfaces to mark images or texts, retouch the appearance, or cover the projection area RP of the projection screen 12 to improve the clarity of the projected drawings. The material of the shading layer may include, for example, ink, but is not limited thereto. The dimming structure may be disposed on the outer surface or the inner surface of the glass structure, or disposed between the multiple layers of glass of the glass structure, and the dimming structure may be disposed corresponding to the entire area or a partial area of ​​the glass structure to achieve a shading effect or improve the clarity of the projected drawings. The dimming structure may include dye liquid crystal, polymer dispersed liquid crystal (PDLC), polymer network liquid crystal (PNLC), cholesterol liquid crystal, electrochromic structure, suspended particle color-changing material, electronic ink, photochromic structure or other suitable elements or materials, but not limited thereto. For example, the dimming structure may be arranged corresponding to the projection area RP to change the transparency of the electrochromic structure (e.g., reduce the transparency) by voltage modulation, thereby improving the clarity of the projected drawing, but not limited thereto. The electrochromic structure may include double-layer glass, a double-layer electrode layer arranged between the double-layer glass, and an electrochromic layer arranged between the double-layer electrode layers, but not limited thereto. The anti-reflection layer may be arranged on at least one of the outer surface and the inner surface of the glass structure and, for example, may fully or partially cover the at least one of the surfaces to reduce the visual interference caused by reflection. The baffle may be a movable baffle. When there is a projection requirement, the baffle may be raised between the display 10 and the glass structure and arranged corresponding to the projection area RP. The curvature of the baffle may be the same as or different from the curvature of the projection region RP.

[0028] The projection screen 12 may include a non-projection area RNP and a projection area RP for projecting the first figure displayed by the display 10 onto it to form a second figure, wherein the projection area RP is, for example, closer to the display 10 than the non-projection area RNP, and the third area R3 and the fourth area R4 are located in the projection area RP.

[0029] In some embodiments, the projection area RP of the display 10 and the projection screen 12 can each be divided into two or more areas. Figure 1As shown, the display 10 includes not only the first area R1 and the second area R2, but also the fifth area R5 located between the first area R1 and the second area R2, and the projection screen 12 includes not only the third area R3 and the fourth area R4, but also the sixth area R6 located between the third area R3 and the fourth area R4, but the present invention is not limited thereto. In other embodiments, the projection area RP of the display 10 and the projection screen 12 can be divided into more areas or fewer areas.

[0030] When the display 10 displays the first figure, the figure light (such as the figure light L1, the figure light L2, and the figure light L3) from the display 10 is projected into the projection area RP, and the second figure is formed in the projection area RP. For example, the figure light L1 from the first area R1 of the display 10 is projected into the third area R3 of the projection screen 12, the figure light L2 from the fifth area R5 of the display 10 is projected into the sixth area R6 of the projection screen 12, and the figure light L3 from the second area R2 of the display 10 is projected into the fourth area R4 of the projection screen 12, wherein the optical path of the figure light L3 is greater than the optical path of the figure light L2, and the optical path of the figure light L2 is greater than the optical path of the figure light L1.

[0031] Since the light intensity of the display 10 decreases as the light path of the projection light increases, the regional brightness difference in the projection area RP can be reduced or the consistency of the regional brightness in the projection area RP can be improved by making the light intensity of the projection light with a longer light path greater (or making the light intensity of the projection light with a shorter light path smaller). Figure 1 For example, when the display 10 displays the first figure, the brightness of the first area R1 can be made smaller than the brightness of the fifth area R5, and the brightness of the fifth area R5 can be made smaller than the brightness of the second area R2, so that the brightness of the third area R3, the sixth area R6 and the fourth area R4 are relatively consistent (for example, the brightness is similar or the same). In other words, when the display 10 displays the first figure, the brightness difference between the first area R1 and the second area R2 is greater than the brightness difference between the third area R3 and the fourth area R4, and the brightness difference between the first area R1 and the fifth area R5 is greater than the brightness difference between the third area R3 and the sixth area R6.

[0032] The method of measuring the brightness of different areas may include measuring the brightness of different areas under a pure color drawing (e.g., a white drawing, a red drawing, a green drawing, or a blue drawing). For example, the display 10 may display a pure color drawing, and then a spectrum meter (e.g., CA-310, DMS, CS-2000, SR-3) may be fixed at the center of the driver's eyes to photograph the first area R1 of the display 10, the second area R2 of the display 10, the third area R3 of the projection screen 12, and the fourth area R4 of the projection screen 12 to obtain four brightness distribution diagrams corresponding to the above four areas. Then, a single point in each brightness distribution diagram may be taken for brightness comparison or multiple points in each brightness distribution diagram may be taken for average brightness comparison. Alternatively, a camera or a charge coupled device (CCD) may be used to take a photo of the drawing and then analyze the chromaticity in the photo, and then compare the chromaticity. Specifically, the brightness distribution diagram shows the brightness distribution under different plane angles φ and solid angles θ. If a single-point brightness comparison is performed, the brightness at the position of θ=60° and φ=45° in the four brightness distribution diagrams corresponding to the first region R1, the second region R2, the third region R3, and the fourth region R4 can be taken for brightness comparison. For example, the brightness at the position of θ=60° and φ=45° in the four brightness distribution diagrams corresponding to the first region R1, the second region R2, the third region R3, and the fourth region R4 is I1, I2, I3, and I4, respectively. Then, the brightness difference between the first region R1 and the second region R2 can be obtained by subtracting I2 from I1, and the brightness difference between the third region R3 and the fourth region R4 can be obtained by subtracting I4 from I3. Then, by comparing the above two brightness differences, it is confirmed whether the design scheme disclosed in the present invention is adopted.

[0033] If average brightness comparison is performed, the brightness at the solid angle θ with equal angular spacing can be averaged under a fixed plane angle φ before the average brightness comparison is performed. For example, the brightness at three points θ=57°, θ=60° and θ=63° can be averaged under φ=45° before the average brightness comparison is performed (that is, the brightness of three points is averaged for each brightness distribution diagram, and then the average brightness is used to compare the brightness difference of different regions). Alternatively, the brightness at the solid angle θ with equal angular spacing can be averaged under the plane angle φ with equal angular spacing before the average brightness comparison is performed. For example, the brightness at nine points θ=57°, θ=60° and θ=63° can be averaged under φ=45, φ=45° and φ=50° before the average brightness comparison is performed (that is, the brightness of nine points is averaged for each brightness distribution diagram, and then the average brightness is used to compare the brightness difference of different regions). It should be understood that the above description is only for the convenience of understanding, and is not intended to limit the method of measuring the brightness of different regions.

[0034] Figure 2 is a side view of a head-up display system according to some embodiments of the present disclosure. Figure 2The surface of the projection screen 12 is, for example, an aspherical surface, that is, the surface of the projection screen 12 may have a plurality of curvature radii ( Figure 2 Schematically showing the curvature radius C1 and the curvature radius C2). In some embodiments, the area with a smaller curvature in the projection screen 12 can be selected as the projection area RP to reduce the distortion of the drawing. Since the larger the curvature radius, the smaller the curvature. Figure 2 In the embodiment, the curvature radius C2 can be selected as the projection area RP, so that the curvature of the projection area RP is smaller than the curvature of the non-projection area RNP.

[0035] In some embodiments, the clarity of the projected image can be improved by reducing the transparency of the projection area RP. Figure 2 As shown, the transparency of the projection area RP may be less than the transparency of the non-projection area RNP. In some embodiments, the transparency of the projection area RP may be reduced by providing a light shielding layer, an electrochromic structure or a baffle in the projection area RP, but the present invention is not limited thereto.

[0036] Figures 3 to 5 1 and 2 are exploded views of three types of displays that can be applied to the embodiments of the present disclosure. Figure 3 As shown, the display 10 may include a light source 100, a first light modulator 102, a display panel 104, and a second light modulator 106, but is not limited thereto. The display 10 may increase or decrease one or more components according to needs.

[0037] The light source 100 can be used to provide illumination light, and the type of the light source 100 is not limited. For example, the light source 100 may include a direct-down light source or a side-light-input light source, but is not limited thereto. In some embodiments, although not shown in the figure, the light source 100 may include a circuit board, a light-emitting element, and a heat sink, but is not limited thereto. The light source 100 may increase or decrease one or more elements as required. The light-emitting element may include a light-emitting diode (LED), and the light-emitting diode may include, for example, a sub-millimeter light-emitting diode (mini LED) or a micro light-emitting diode (micro LED), but is not limited thereto.

[0038] The first light modulator 102 is disposed on the transmission path of the illumination light from the light source 100 and is located between the light source 100 and the display panel 104, thereby modulating the optical parameters (such as uniformity, collimation, etc.) of the illumination light. The illumination light forms a relay modulated light through the first light modulator 102, so that the relay modulated light can have better uniformity or collimation than the illumination light, etc., but is not limited to this. For example, the first light modulator may include one or more relay optical elements, such as one or more collimators, one or more lenses, one or more prisms, one or more diffusers and / or one or more focusing elements, but is not limited to this. In this article, the first light modulator 102 generally refers to an optical element that substantially maintains the transmission direction of light.

[0039] The display panel 104 is disposed on the transmission path of the relay modulated light from the first light modulator 102 and is located between the first light modulator 102 and the second light modulator 106. The display panel 104 can be used to convert the relay modulated light into an illustration light (including the illustration light L1, the illustration light L2 and the illustration light L3) with display information (including color and / or grayscale). For example, the display panel 104 may include a non-self-luminous display panel, such as a liquid crystal display panel, but not limited thereto. The liquid crystal display panel may include a plurality of pixels P arranged in an array to display the illustration. In some embodiments, although not shown in the figure, the display panel 104 may include a lower polarizer, a working panel and an upper polarizer arranged in sequence from the first light modulator 102 to the second light modulator 104, wherein the working panel may, for example, include an array substrate (such as a TFT substrate), a liquid crystal layer and a color filter (CF) substrate, or the working panel may, for example, include a color filter array (COA) substrate and a liquid crystal layer, but not limited thereto. The display panel 104 may have one or more components added or reduced according to needs.

[0040] The second light modulator 106 is disposed on the transmission path of the image light from the display panel 104 and can be used to modulate the optical parameters (such as uniformity, collimation, etc.) of the image light. For example, the second light modulator 106 may include one or more relay optical elements, such as one or more collimators, one or more lenses, one or more prisms, and / or one or more beam splitters, but not limited thereto. In some embodiments, the second light modulator 106 may also be a cover plate for protecting the display panel 104. In some embodiments, the second light modulator 106 may be selectively omitted, but not limited thereto.

[0041] In some embodiments, such as Figure 3As shown, the regional brightness control can be performed on the multiple light-emitting elements in the light source 100, for example, the brightness of the multiple light-emitting elements in the first zone R1 is made smaller than the brightness of the multiple light-emitting elements in the fifth zone R5, and the brightness of the multiple light-emitting elements in the fifth zone R5 is smaller than the brightness of the multiple light-emitting elements in the second zone R2, so that the brightness of the illustration light L1 emitted from the first zone R1 of the display 10 is smaller than the brightness of the illustration light L2 emitted from the fifth zone R5 of the display 10, and the brightness of the illustration light L2 emitted from the fifth zone R5 of the display 10 is smaller than the brightness of the illustration light L3 emitted from the second zone R2 of the display 10.

[0042] In other embodiments, such as Figure 4 As shown, the multiple light-emitting elements in the light source 100 may have uniform brightness, and the regional transmittance control of the multiple pixels P of the display panel 104 may be performed. For example, the transmittance of the multiple pixels P in the first region R1 may be made smaller than the transmittance of the multiple pixels P in the fifth region R5 by electrical control, and the transmittance of the multiple pixels P in the fifth region R5 may be smaller than the transmittance of the multiple pixels P in the second region R2, so that the brightness of the illustration light L1 emitted from the first region R1 of the display 10 is smaller than the brightness of the illustration light L2 emitted from the fifth region R5 of the display 10, and the brightness of the illustration light L2 emitted from the fifth region R5 of the display 10 is smaller than the brightness of the illustration light L3 emitted from the second region R2 of the display 10.

[0043] In some other embodiments, Figure 5 As shown, the display 10 may include a display panel 104 and a second light modulator 106 but does not include the aforementioned light source 100 and the first light modulator 102, wherein the display panel 104 is, for example, a self-luminous display panel and includes a plurality of light-emitting elements. Under this architecture, the brightness of the plurality of light-emitting elements in the display panel 104 may be controlled regionally, for example, the brightness of the plurality of light-emitting elements in the first region R1 is made smaller than the brightness of the plurality of light-emitting elements in the fifth region R5, and the brightness of the plurality of light-emitting elements in the fifth region R5 is made smaller than the brightness of the plurality of light-emitting elements in the second region R2, so that the brightness of the light L1 emitted from the first region R1 of the display 10 is smaller than the brightness of the light L2 emitted from the fifth region R5 of the display 10, and the brightness of the light L2 emitted from the fifth region R5 of the display 10 is smaller than the brightness of the light L3 emitted from the second region R2 of the display 10.

[0044] Figures 6 to 9 1 and 2 are partial cross-sectional diagrams of three displays applicable to the embodiments of the present disclosure. In some embodiments, the plurality of light emitting elements in the display 10 may include light emitting elements of different colors. Figure 6As shown, the display 10 may include a substrate SUB, a plurality of semiconductor patterns CH, a dielectric layer IN1, a plurality of gates GE, a dielectric layer IN2, a plurality of source electrodes SE, a plurality of drain electrodes DE, a plurality of common electrodes CE, a dielectric layer IN3, a pixel definition layer PDL, a dielectric layer IN4, a plurality of first electrodes E1, a plurality of second electrodes E2, a reflective layer RL, a plurality of light-emitting elements (such as a red light-emitting element LEDr, a green light-emitting element LEDg, and a blue light-emitting element LEDb), and an encapsulation layer CL, but is not limited thereto.

[0045] The substrate SUB may be a hard substrate or a flexible substrate. The material of the substrate SUB includes, for example, glass, quartz, ceramic, sapphire or plastic, but is not limited thereto. The plastic may include polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethyleneterephthalate (PET), polyethylenenaphthalate (PEN), polyethersulfone (PES), polymethyl methacrylate (PMMA) or other suitable flexible materials or a combination of the foregoing materials, but is not limited thereto. In some embodiments, the thickness of the substrate SUB may be less than 1000 microns. For example, the thickness of the substrate SUB may be between 5 microns and 30 microns (5μm≤thickness≤30μm), but is not limited thereto. In addition, the transmittance of the substrate SUB is not limited, that is, the substrate SUB may be a transparent substrate, a semi-transparent substrate or an opaque substrate.

[0046] A plurality of semiconductor patterns CH are disposed on the substrate SUB. The materials of the plurality of semiconductor patterns CH include, for example, silicon semiconductor, oxide semiconductor or other suitable semiconductor materials. Silicon semiconductor includes, for example, amorphous silicon or polycrystalline silicon. Oxide semiconductor includes, for example, indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO) or indium gallium zinc oxide (IGZO), but is not limited thereto.

[0047] The dielectric layer IN1 is disposed on the plurality of semiconductor patterns CH and the substrate SUB. The material of the dielectric layer IN1 includes, for example, an organic insulating material, an inorganic insulating material, or a combination thereof. The organic insulating material includes, for example, polymethyl methacrylate (PMMA), epoxy, acrylic-based resin, silicone, polyimide polymer, or a combination thereof, but is not limited thereto. The inorganic insulating material includes, for example, silicon oxide or silicon nitride, but is not limited thereto.

[0048] The plurality of gates GE are disposed on the dielectric layer IN1 and are respectively located above the plurality of semiconductor patterns CH. The material of the plurality of gates GE includes, for example, metal or metal stack, such as aluminum, molybdenum or titanium / aluminum / titanium, but is not limited thereto.

[0049] The dielectric layer IN2 is disposed on the plurality of gates GE and the dielectric layer IN1. The material of the dielectric layer IN2 can refer to the material listed for the dielectric layer IN1, which will not be repeated here.

[0050] A plurality of source electrodes SE, a plurality of drain electrodes DE, and a plurality of common electrodes CE are disposed on the dielectric layer IN2, wherein each source electrode SE penetrates the dielectric layer IN2 and is electrically connected to a source region (not labeled) of a corresponding semiconductor pattern CH, and each drain electrode DE penetrates the dielectric layer IN2 and is electrically connected to a drain region (not labeled) of a corresponding semiconductor pattern CH. In some embodiments, the display 10 may include a plurality of active elements AD, and each active element AD includes, for example, a gate GE, a semiconductor pattern CH, a source electrode SE, and a drain electrode DE, but is not limited thereto.

[0051] The dielectric layer IN3 is disposed on the plurality of source electrodes SE, the plurality of drain electrodes DE, the plurality of common electrodes CE and the dielectric layer IN2. The material of the dielectric layer IN3 can refer to the material listed for the dielectric layer IN1, which will not be repeated here.

[0052] The pixel definition layer PDL is disposed on the dielectric layer IN3 and has a plurality of openings A for accommodating a plurality of light-emitting elements. The material of the pixel definition layer PDL includes, for example, an opaque organic polymer material to reduce interference and / or light mixing between adjacent light-emitting elements. The opaque organic polymer material may be a white, gray or black organic polymer material, such as a black matrix, but is not limited thereto. In some embodiments, the material of the pixel definition layer PDL may include a transparent organic polymer material. The transparent organic polymer material may include, but is not limited thereto, a resin.

[0053] The dielectric layer IN4 is disposed on the dielectric layer IN3 and is located in the plurality of openings A. The material of the dielectric layer IN4 can refer to the material listed for the dielectric layer IN1 and will not be repeated here.

[0054] A plurality of first electrodes E1 and a plurality of second electrodes E2 are disposed on the dielectric layer IN3 and are located in a plurality of openings A, and the dielectric layer IN4 exposes the plurality of first electrodes E1 and the plurality of second electrodes E2. Each first electrode E1 penetrates the dielectric layer IN3 and is electrically connected to a corresponding drain DE, and each second electrode E2 penetrates the dielectric layer IN3 and is electrically connected to a corresponding common electrode CE. The materials of the plurality of first electrodes E1 and the plurality of second electrodes E2 include, for example, metal or metal stacks, such as aluminum, molybdenum, or titanium / aluminum / titanium, but are not limited thereto.

[0055] The reflective layer RL is disposed on the sidewall of the pixel definition layer PDL and covers at least a portion of the dielectric layer IN4. The material of the reflective layer RL includes, for example, metal, alloy, or a combination thereof. By disposing the reflective layer RL on the sidewall of the pixel definition layer PDL, a large-angle light beam from the light-emitting element can be reflected, thereby improving light utilization or reducing light mixing.

[0056] The plurality of light emitting elements may include, for example, a plurality of red light emitting elements LEDr (only one is schematically shown), a plurality of green light emitting elements LEDg (only one is schematically shown), and a plurality of blue light emitting elements LEDb (only one is schematically shown). Each light emitting element may include an electrode E3 and an electrode E4, wherein the electrode E3 may be electrically connected to a drain DE of a corresponding active element AD through a first electrode E1, and the electrode E4 may be electrically connected to a corresponding common electrode CE through a second electrode E2.

[0057] The encapsulation layer CL is disposed on the pixel definition layer PDL, the reflective layer RL, the dielectric layer IN4, the first electrodes E1, the second electrodes E2 and the light emitting elements. The material of the encapsulation layer CL includes, for example, silicon oxide, silicon nitride or acrylic polymer materials, but is not limited thereto.

[0058] In some embodiments, the plurality of light emitting elements in the display 10 may all be light emitting elements of the same color, and the display 10 may further include a color conversion pattern. Figure 7As shown, the multiple light-emitting elements in the display 10 may all be blue light-emitting elements LEDb (or ultraviolet light-emitting elements). In addition, the display 10 may further include a spacer layer PL, a plurality of color conversion patterns (such as color conversion pattern Qr and color conversion pattern Qg) and a fill layer F. The spacer layer PL is disposed on the encapsulation layer CL and has a plurality of openings B. The plurality of openings B overlap the plurality of blue light-emitting elements LEDb, respectively. The material of the spacer layer PL, for example, includes the aforementioned organic material, but is not limited thereto. The plurality of color conversion patterns are respectively filled in the plurality of openings B of the spacer layer PL, wherein the number of the plurality of openings is greater than the number of the plurality of color conversion patterns, that is, some of the openings are not filled with the color conversion patterns. The material of the plurality of color conversion patterns, for example, includes fluorescence, phosphorescence, quantum dots (Quantum Dot, QD), other suitable materials or combinations thereof, but is not limited thereto. In some embodiments, the material of the plurality of color conversion patterns may be selected from materials that do not contain chromium (Cd) to respond to environmental protection. For example, the materials of the plurality of color conversion patterns may include zinc selenide (ZnSe), graphene quantum dot (GQD), silicon quantum dot (SiQD), indium phosphide (InP), copper indium selenide (CuInSe) or indium arsenide (InAs), but not limited thereto. The filling layer F fills the opening B where no color conversion pattern is set and the opening B where the color conversion pattern is set. The material of the filling layer F includes, for example, optical clear adhesive (OCA) or optical clear resin (OCR), but not limited thereto.

[0059] In some embodiments, the display 10 can utilize the design of the spacer layer PL to improve light collimation and / or meet special display requirements. Figure 8 and Fig. 9 As shown, under the structure of the multi-color light emitting element, the display 10 may further include a spacer layer PL and a fill layer F. By changing the angle of the side wall of the spacer layer PL, the light path can be changed so that different colors of light (such as red light Lr, green light Lg and blue light Lb) are transmitted in a specified direction.

[0060] Figures 10 to 12 These are schematic diagrams of three vehicle-mounted systems according to some embodiments of the present disclosure. Fig.10, the vehicle-mounted system 2 adjacent to the driver's seat 20 may include a display 10 and a windshield 22. The display 10 is used to display the first figure. The windshield 22 includes a projection screen 12 disposed adjacent to the display 10 and used to project the first figure thereon to form a second figure. The display 10 is disposed between the driver's seat 20 and the projection screen 12 and includes a first area R1 adjacent to the driver's seat 20 and a second area R2 away from the driver's seat 20. The projection screen 12 includes a third area R3 adjacent to the driver's seat 20 and a fourth area R4 away from the driver's seat 20. When the display 10 displays the first figure, the brightness difference between the first area R1 and the second area R2 is greater than the brightness difference between the third area R3 and the fourth area R4.

[0061] As mentioned above, the light intensity of the display 10 decreases as the light path of the projection light increases. In addition, the reflectivity of the multi-layer film structure of the windshield 22 (e.g., including glass structure, heat insulation layer, etc.) for large-angle incident light is lower than the reflectivity for small-angle incident light. Therefore, the regional brightness difference in the projection area RP can be reduced or the consistency of regional brightness in the projection area RP can be improved by making the light intensity of the projection light from the area farther away from the driver in the display 10 greater (or making the light intensity of the projection light from the area closer to the driver in the display 10 smaller). Fig.10 For example, when the display 10 displays the first figure, the brightness of the first region R1 can be made smaller than the brightness of the second region R2, so that the brightness of the third region R3 and the fourth region R4 are more consistent (for example, the brightness is similar or the same). In other words, when the display 10 displays the first figure, the brightness difference between the first region R1 and the second region R2 is greater than the brightness difference between the third region R3 and the fourth region R4.

[0062] The method for measuring the brightness of different areas in this embodiment can be referred to above and will not be repeated here. Figure 2 The display 10 may be used Figures 3 to 9 Any of the above designs will not be repeated here.

[0063] exist Fig.10 The first area R1 and the second area R2 of the display 10 are separated from each other. For example, the first area R1 and the second area R2 may be two independent display panels, but the present disclosure is not limited thereto. In other embodiments, the first area R1 and the second area R2 may be connected to each other, and the first area R1 and the second area R2 may be two different areas of a single display panel. Fig.11As shown, a single display panel can be divided into multiple areas, and the light intensity of the image light from the area farther away from the driver in the display 10 is made greater (or the light intensity of the image light from the area closer to the driver in the display 10 is made smaller), so as to reduce the regional brightness difference in the projection area RP or improve the consistency of the regional brightness in the projection area RP. Fig.11 For example, in the display 10, the first area R1, the second area R2, the seventh area R7, and the eighth area R8 are arranged in a direction away from the driver. Therefore, the light intensity of the projection light L1 from the first area R1 can be made smaller than the light intensity of the projection light L3 from the second area R2, the light intensity of the projection light L3 from the second area R2 can be made smaller than the light intensity of the projection light L7 from the seventh area R7, and the light intensity of the projection light L7 from the seventh area R7 can be made smaller than the light intensity of the projection light L8 from the eighth area R8, so as to improve the consistency of the brightness of the third area R3, the fourth area R4, the ninth area R9, and the tenth area R10 in the projection area RP.

[0064] Please refer to Fig.12 , the vehicle-mounted system 2 adjacent to the driver's seat 20 may include a display 10 and a windshield 22. The display 10 is used to display the first figure. The windshield 22 includes a projection screen 12 disposed adjacent to the display 10 and used to project the first figure thereon to form a second figure. The display 10 is disposed between the driver's seat 20 and the projection screen 12 and includes a first area R1 adjacent to the driver's seat 20 and a second area R2 away from the driver's seat 20. The projection screen 12 includes a third area R3 adjacent to the driver's seat 20 and a fourth area R4 away from the driver's seat 20. When the display 10 displays the first figure, the chromaticity difference between the first area R1 and the second area R2 is greater than the chromaticity difference between the third area R3 and the fourth area R4.

[0065] Specifically, the reflection spectrum of the multilayer film structure of the windshield 22 (including, for example, a glass structure, a heat insulation layer, etc.) will shift towards shorter wavelengths as the angle increases. That is to say, the larger the reflection angle, the bluer the figure in the drawing will be. By performing chromaticity compensation on different display areas, the chromaticity consistency between different areas within the projection area RP can be improved, reducing the driving risk caused by the driver's misjudgment of colors. For example, when the display 10 shows the first figure in the drawing, the chromaticity of the second area R2 can be made redder than that of the first area R1. Taking the CIE1931 color space as an example, if the color coordinates of the first area R1 are (x1, y1) and the color coordinates of the second area R2 are (x2, y2), chromaticity compensation can be performed by making x1 < x2 and y1 < y2. In some embodiments, the chromaticity consistency between different areas can generally refer to the color coordinate difference between the third area R3 and the fourth area R4 being less than 0.01 under a red figure in the drawing, for example, |x2 - x1| < 0.01 and / or |y2 - y1| < 0.01. In some embodiments, the chromaticity consistency between different areas can generally refer to the color coordinate difference between the third area R3 and the fourth area R4 being less than 0.01 under a white figure in the drawing, for example, |x2 - x1| < 0.01 and / or |y2 - y1| < 0.01.

[0066] The method for measuring the chromaticity of different areas may include measuring the chromaticity of different areas under a solid-color figure in the drawing (such as a white figure, a red figure, a green figure, or a blue figure). For example, the display 10 can be made to show a solid-color figure in the drawing (such as a white figure or a red figure), and then a spectrum measuring instrument (such as: CA-310, DMS, CS-2000, SR-3) can be fixed at the central position of the driver's eyes to photograph the first area R1 of the display 10, the second area R2 of the display 10, the third area R3 of the projection screen 12, and the fourth area R4 of the projection screen 12 to obtain four spectra corresponding to the above four areas. Then, the four spectra are converted into color coordinates for chromaticity comparison. Alternatively, the reflection spectrum of the windshield 22 and the spectrum of the display 10 can also be measured, and then the reflection spectrum of the windshield 22 is multiplied by the spectrum of the display 10 and then converted into color coordinates for chromaticity comparison. Or a camera or a charge-coupled device (CCD) can be used to take a photo of the figure in the drawing and then analyze the chromaticity in the photo and compare the chromaticity.

[0067] In summary, in the embodiments disclosed herein, by performing pre-brightness or chromaticity compensation on different areas of the display, the brightness or chromaticity consistency of the figure formed on the projection screen can be improved, thereby enhancing the driving experience.

[0068] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

[0069] Although the embodiments and advantages of the present disclosure have been disclosed as above, it should be understood that any person skilled in the art can make changes, substitutions and modifications without departing from the spirit and scope of the present disclosure, and the features between the embodiments can be arbitrarily mixed and replaced with each other to form other new embodiments. In addition, the scope of protection of the present disclosure is not limited to the processes, machines, manufacturing, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any person skilled in the art can understand the current or future developed processes, machines, manufacturing, material compositions, devices, methods and steps from the disclosure of the present disclosure, as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can all be used according to the present disclosure. Therefore, the scope of protection of the present disclosure includes the above-mentioned processes, machines, manufacturing, material compositions, devices, methods and steps. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present disclosure also includes the combination of each claim and embodiment. The scope of protection of the present disclosure shall be determined by the attached claims.

Claims

1. A head-up display system, characterized in that: Comprising: A display for displaying a first drawing; And A projection screen disposed adjacent to the display and for allowing the first drawing to be projected thereon to form a second drawing, wherein: The display includes a first region adjacent to the projection screen and a second region remote from the projection screen, The projection screen includes a third region adjacent to the display and a fourth region remote from the display, and When the display displays the first drawing, the brightness difference between the first region and the second region is greater than the brightness difference between the third region and the fourth region.

2. The head-up display system according to claim 1, characterized in that: When the display displays the first drawing, the brightness of the first region is less than the brightness of the second region.

3. The head-up display system according to claim 1, characterized in that: The projection screen includes a non-projection region and a projection region for allowing the first drawing to be projected thereon to form the second drawing, the third region and the fourth region being located in the projection region, and wherein: The curvature of the projection region is less than the curvature of the non-projection region.

4. The head-up display system according to claim 1, characterized in that: The projection screen includes a non-projection region and a projection region for allowing the first drawing to be projected thereon to form the second drawing, the third region and the fourth region being located in the projection region, and wherein: The transparency of the projection region is less than the transparency of the non-projection region.

5. A vehicle-mounted system, arranged adjacent to a driver's seat, characterized in that: Comprising: A display for displaying a first drawing; And A windshield including a projection screen disposed adjacent to the display and for allowing the first drawing to be projected thereon to form a second drawing, wherein: The display is disposed between the driver's seat and the projection screen and includes a first region adjacent to the driver's seat and a second region remote from the driver's seat, The projection screen includes a third region adjacent to the driver's seat and a fourth region remote from the driver's seat, and When the display displays the first drawing, the brightness difference between the first region and the second region is greater than the brightness difference between the third region and the fourth region.

6. The vehicle-mounted system according to claim 5, characterized in that: When the display displays the first drawing, the brightness of the first region is less than the brightness of the second region.

7. The vehicle-mounted system according to claim 5, characterized in that: The projection screen includes a non-projection region and a projection region for allowing the first drawing to be projected thereon to form the second drawing, the third region and the fourth region being located in the projection region, and wherein: The curvature of the projection region is less than the curvature of the non-projection region.

8. A vehicle-mounted system, arranged adjacent to a driver's seat, characterized in that: Comprising: A display for displaying a first drawing; And A windshield including a projection screen disposed adjacent to the display and for allowing the first drawing to be projected thereon to form a second drawing, wherein: The display is disposed between the driver's seat and the projection screen and includes a first region adjacent to the driver's seat and a second region remote from the driver's seat, The projection screen includes a third region adjacent to the driver's seat and a fourth region remote from the driver's seat, and When the display displays the first drawing, the chromaticity difference between the first region and the second region is greater than the chromaticity difference between the third region and the fourth region.

9. The vehicle-mounted system according to claim 8, characterized in that: When the display displays the first drawing, the chromaticity of the second region is more reddish than the chromaticity of the first region.

10. The vehicle-mounted system according to claim 8, characterized in that: The chromaticity coordinates of the first region are (x1, y1), and the chromaticity coordinates of the second region are (x2, y2), where x1 < x2 and y1 < y2.

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