KR20140124488A - Head-up display device for automobile - Google Patents

Head-up display device for automobile Download PDF

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Publication number
KR20140124488A
KR20140124488A KR1020130042041A KR20130042041A KR20140124488A KR 20140124488 A KR20140124488 A KR 20140124488A KR 1020130042041 A KR1020130042041 A KR 1020130042041A KR 20130042041 A KR20130042041 A KR 20130042041A KR 20140124488 A KR20140124488 A KR 20140124488A
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KR
South Korea
Prior art keywords
lcd
vehicle
light source
module
lcd panel
Prior art date
Application number
KR1020130042041A
Other languages
Korean (ko)
Inventor
강주성
남장현
박승우
Original Assignee
(주)넥스디스플레이
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Application filed by (주)넥스디스플레이 filed Critical (주)넥스디스플레이
Priority to KR1020130042041A priority Critical patent/KR20140124488A/en
Publication of KR20140124488A publication Critical patent/KR20140124488A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
    • G02B27/026—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies and a display device, e.g. CRT, LCD, for adding markings or signs or to enhance the contrast of the viewed object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
    • B60R2300/20—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of display used
    • B60R2300/205—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of display used using a head-up display
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
    • B60R2300/30—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of image processing
    • B60R2300/307—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of image processing virtually distinguishing relevant parts of a scene from the background of the scene
    • B60R2300/308—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the type of image processing virtually distinguishing relevant parts of a scene from the background of the scene by overlaying the real scene, e.g. through a head-up display on the windscreen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B2027/0192—Supplementary details
    • G02B2027/0196—Supplementary details having transparent supporting structure for display mounting, e.g. to a window or a windshield

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)

Abstract

The present invention relates to a head up display (HUD) device for a vehicle, capable of displaying various pieces of vehicle information by a virtual image on a windshield of a driver seat of the vehicle. The HUD device comprises: a liquid crystal display (LCD) module to output an image; a control unit to control data displaying a state of a vehicle to be outputted in the LCD module; and a mirror to reflect the image outputted by the LCD module so that a virtual image can be displayed on a windshield of the vehicle, wherein the LCD module includes an LCD panel, a light source unit to supply a light source to the LCD panel, and an optical bonding unit which is a material filled out to prevent air in space between the LCD panel and the light source unit for optical bonding. The HUD device can lower the brightness of a light emitting diode (LED) by improving light efficiency, prevent a whitening phenomenon of the LCD by lowering heat generated in the LED, and extend a lifespan of the LCD.

Description

[0001] HEAD-UP DISPLAY DEVICE FOR AUTOMOBILE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display (HUD) for a vehicle, which displays various vehicle information in a virtual image on a windshield of a vehicle, Technology to improve light efficiency

When we look at the human living space of the 21st century, it can be divided into three kinds of house, workplace, and moving space. In particular, the vehicle occupies most of the moving space. So, as the time on the vehicle increases, electronic products used in residential space are being developed for use in vehicles.

For example, there are audio video system installation, simple refrigerator, and so on. In addition, as electronic products are developed, they are applied to fields that help driving, which is convenient. A typical example is car navigation. However, the driver must identify objects in sight and drive while confirming the vehicle is in motion. HUD (Head Up Display) is a major concern, as there are several systems under development that provide drivers with safety during driving and provide vehicle drivers with information on driving and surrounding conditions effectively.

As described above, there is a head up display (HUD) for displaying various vehicle information on a front window of a vehicle in a virtual image so that the driver can observe the vehicle ahead while driving while checking vehicle information. ) System has been developed and installed in vehicles.

HUD is a system that provides vehicle driving information or other information to the front of the driver during the driving of the vehicle or aircraft, ie, without departing from the driver's main visual field. In the early days, the HUD was a vehicle HUD that was developed to be attached to an aircraft, especially a fighter.

There is usually a risk because it moves about 55m to the time (about 2 seconds) to put the field of view on the instrument panel while driving at about 100m / h, and fix the field of view to the road. One way to reduce this risk is to develop a car HUD. The vehicle HUD displays the information (speed, mileage, RPM, etc.) of the instrument panel on the driver's main field of view of the windshield so that the driver can easily navigate the vehicle while driving. This allows the driver to operate safely by recognizing important driving information without having to take his or her eyes off the road.

In general, the head-up display system includes a display unit, an optical system, a holographic combiner, and the like, and displays various kinds of information related to driving to the driver in front of the vehicle.

That is, if the driving information such as the current vehicle speed and the position is made to be a predetermined image through the display unit and the image is projected to a holographic combiner attached to a windshield which is a windshield of a vehicle using an optical system , A predetermined virtual image is formed on the empty space in the front of the vehicle so that the driver can see the information related to the running of the current vehicle such as the current position or speed of the vehicle without checking the instrument panel through the visual field.

In order to drive a conventional head-up display device, light must be generated with a light intensity of 10,000 [cd] or more in a light source. At this time, when the light source is an LED, heat of 80 to 90 ° C is generated.

As described above, due to the high heat generated when the head-up display device is driven, the liquid crystal of the LCD (liquid crystal display module) is affected, causing a so-called whitening phenomenon and shortening the service life.

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SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to increase the light efficiency in driving the head-up display device, thereby reducing heat emitted from the LEDs, thereby preventing whitening of the LCD module, A head-up display device capable of displaying a head-up display.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to another aspect of the present invention, there is provided a head-up display device for a vehicle, comprising: a liquid crystal display module for outputting images; a control unit for controlling the LCD module to output data indicative of a state of the vehicle; and a mirror for reflecting an image output from the LCD module so that a virtual image is displayed on the front window of the vehicle. The LCD module includes a liquid crystal display panel, a light source for supplying the light source to the LCD panel, And a light bonding part that is a material filled in the space between the LCD panel and the light source part so that air is not present for optical bonding and optical bonding.

In the present invention, the optical bonding unit may be implemented with OCR (Optical Clearance Resin).

The LCD module includes a lower polarizer formed on a lower surface of the LCD panel and performing polarizing function to emit light emitted from the light source in a predetermined direction, and a lower polarizer formed on the upper surface of the LCD panel to emit light emitted from the light source unit in a predetermined direction And may further comprise an upper polarizer plate that performs a polarizing function to be irradiated. At this time, the lower polarizer and the upper polarizer may be formed to be orthogonal to each other.

The light source unit may include a light emitting diode (LED).

According to the present invention, by improving the light efficiency in the head-up display device, the brightness of the LED can be lowered, thereby lowering the heat generated by the LED, thereby preventing whitening of the LCD and extending the lifetime of the LCD .

FIG. 1 shows a schematic configuration of a head-up display device according to an embodiment of the present invention.
2 is a view showing a virtual image formed in front of a vehicle according to an embodiment of the present invention.
FIG. 3 is a view illustrating a configuration of an LCD module in a head-up display device according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 shows a schematic configuration of a head-up display device according to an embodiment of the present invention.

1, a head-up display device according to the present invention includes an LCD module (Liquid Crystal Display module) 100, a mirror 110, a control unit 120, and the like.

The LCD module 100 serves to output an image. In the present invention, a video image displayed by the LCD module 100, for example, an image corresponding to various vehicle information received from an electronic control unit (ECU) in the vehicle is reflected by the mirror 110 And then projected onto the driver's seat windshield 150. Accordingly, the driver of the vehicle can simultaneously observe the image of the virtual image projected on the front windshield window 150 of the driver's seat while keeping a forward view of the vehicle during driving.

The mirror 110 reflects an image output from the LCD module 100 so that a virtual image is displayed on the front window of the vehicle.

The control unit 120 controls the LCD module 100 to output data indicating the state of the vehicle.

2 is a view showing a virtual image formed in front of a vehicle according to an embodiment of the present invention.

As shown in FIG. 2, the vehicle driver can operate the vehicle while viewing the virtual image 20 projected on the front window of the driver's seat.

FIG. 3 is a view illustrating a configuration of an LCD module in a head-up display device according to an embodiment of the present invention.

Referring to FIG. 3, the LCD module of the present invention includes a liquid crystal display panel 104, a light source 102, a lower polarizer 106, an upper polarizer 108, a support 110, and an optical bonding portion 310.

The light source unit 102 serves to supply a light source to the LCD panel 104. In an embodiment of the present invention, the light source unit may include a light emitting diode (LED).

The lower polarizer 106 is formed on the lower surface of the LCD panel 104 and serves to perform a polarizing function so that light emitted from the light source unit 102 is irradiated in a predetermined direction.

The upper polarizer 108 is formed on the upper surface of the LCD panel 104 to perform a polarizing function to irradiate the light emitted from the light source unit 102 in a predetermined direction.

In the present invention, the lower polarizer 106 and the upper polarizer 108 may be formed to be perpendicular to each other.

The optical bonding unit 310 is a material filled in the space between the LCD panel and the light source unit so as to prevent air from being present for optical bonding.

In the present invention, the optical bonding part 310 is realized as an adhesive material having a constant refractive index, high transmittance, and high optical efficiency.

In the present invention, the optical bonding unit 310 is preferably implemented by OCR (Optical Clearance Resin).

When the OCR is applied to the head-up display device of the present invention, the light efficiency is increased. According to the experimental results, when the OCR is applied to the head-up display device, the light efficiency increases by about 5 to 7%.

In the head-up display apparatus according to the present invention, as the light efficiency increases, the brightness of the LED of the light source unit 102 can be lowered compared with the conventional apparatus. Therefore, the heat generated from the LED is also reduced. For example, in a conventional head-up display device, the brightness is higher than 10,000 [cd], whereas in the head-up display device of the present invention, brightness is about 8500 [cd] . Accordingly, in the present invention, it is possible to improve the whitening phenomenon of the LCD and to prolong the service life by reducing heat generated from the LED.

While the present invention has been described with reference to several preferred embodiments, these embodiments are illustrative and not restrictive. It will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention and the scope of the appended claims.

100 LCD module 110 Mirror
120 Control unit 150 Front windshield
102 Light source 104 LCD panel
106 Lower polarizer plate 108 Upper polarizer plate
310 optical bonding portion

Claims (5)

A head-up display device for a vehicle,
An LCD module (Liquid Crystal Display module) for outputting an image;
A control unit for outputting data indicating the state of the vehicle to the LCD module; And
And a mirror for reflecting an image output from the LCD module so that a virtual image is displayed on a front windshield of the vehicle,
In the LCD module,
An LCD panel (Liquid Crystal Display panel);
A light source unit for supplying a light source to the LCD panel; And
And a light bonding part for filling the space between the LCD panel and the light source part such that no air exists for optical bonding.
The method according to claim 1,
Wherein the optical bonding unit is an OCR (Optical Clearance Resin).
The method of claim 2,
In the LCD module,
A lower polarizer formed on a lower surface of the LCD panel and performing polarizing function so as to emit light emitted from the light source in a predetermined direction; And
Further comprising an upper polarizer formed on an upper surface of the LCD panel to perform a polarizing function to irradiate light emitted from the light source unit in a predetermined direction.
The method of claim 3,
Wherein the lower polarizer plate and the upper polarizer plate are formed to be perpendicular to each other.
The method according to claim 1,
Wherein the light source unit includes an LED (Light Emitting Diode).
KR1020130042041A 2013-04-17 2013-04-17 Head-up display device for automobile KR20140124488A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017146452A1 (en) * 2016-02-26 2017-08-31 엘지전자 주식회사 Head-up display device for vehicle
KR20170136807A (en) * 2016-06-02 2017-12-12 현대모비스 주식회사 Head-up displays having asymmetric prism for automobile
CN108859758A (en) * 2018-05-28 2018-11-23 南京华顺精密模具有限公司 A kind of vehicle HUD system
US10977983B2 (en) 2016-02-26 2021-04-13 Lg Electronics Inc. Head-up display device for vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017146452A1 (en) * 2016-02-26 2017-08-31 엘지전자 주식회사 Head-up display device for vehicle
US10977983B2 (en) 2016-02-26 2021-04-13 Lg Electronics Inc. Head-up display device for vehicle
KR20170136807A (en) * 2016-06-02 2017-12-12 현대모비스 주식회사 Head-up displays having asymmetric prism for automobile
CN108859758A (en) * 2018-05-28 2018-11-23 南京华顺精密模具有限公司 A kind of vehicle HUD system

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