KR101137775B1 - Hud system using multi-lens - Google Patents

Abstract

The present invention relates to a head device using multiple lenses, and to improve the optical properties and arrangement of the lens to improve the sharpness and discrimination of the driving information image projected on the windshield.
In order to achieve the above object, the present invention provides a liquid crystal panel, a plurality of reflectors that sequentially reflect the driving information image displayed on the liquid crystal panel along a specific path, and enlarge or reduce the driving information image reflected through the reflectors. In a head device using a multiple lens including an optical system for adjusting the focus and reflecting to the windshield, the optical system includes at least one or more lenses sequentially arranged along the same optical axis from the downstream side of the reflector, each of the lenses And a meniscus lens, which are arranged to be convex toward the liquid crystal panel side.

Description

Head device using multiple lenses {HUD SYSTEM USING MULTI-LENS}

The present invention relates to a head device using multiple lenses, and more particularly, to a head using multiple lenses that can improve the optical properties and arrangement of the lens to improve the clarity and discrimination of the driving information image projected on the windshield. Relates to a device.

Recently, various devices for convenience and safety of a vehicle driver have been developed. One example is a head up display (HUD) device.

The head device is a device which displays various driving information, for example, vehicle speed, RPM, fuel remaining amount, etc. on the windshield of a vehicle that the driver watches. The LCD system is mainly used.

As shown in FIG. 1, the LCD device includes a liquid crystal panel 10 and a backlight unit 12 provided at a rear side of the liquid crystal panel 10.

The liquid crystal panel 10 is provided inside an instrument panel 10a in front of the driver's seat and displays an input "travel information image". The backlight unit 12 illuminates the rear surface of the liquid crystal panel 10 to provide a light source.

In addition, the LCD-type head device includes an optical system 14 provided in front of the liquid crystal panel 10.

The optical system 14 includes at least one lens 16 installed in front of the liquid crystal panel 10 and a reflection mirror 18 installed at a predetermined angle in front of the lens 16.

The lens 16 serves to enlarge or reduce the "travel information image" displayed on the liquid crystal panel 10 to an appropriate size and to adjust the focus.

The reflection mirror 18 reflects the "driving information image" emitted from the lens 16 to the windshield 19 of the vehicle. Thus, the "travel information image" can be displayed on the windshield 19 of the vehicle.

Since the head device displays various driving information on the windshield 19, the driver can check the driving information of the vehicle without directly looking at the instrument panel installed on the instrument panel 10.

On the other hand, in such a head device, it is important to clearly display the "travel information image" without distortion. In particular, it is important to enhance the visibility, clarity and discrimination of the "travel information image" by displaying the "travel information image" clearly and without distortion.

This is because the visibility and clarity and identification of the "driving information image" must be high so that the driver of the vehicle can recognize the "driving information image" easily and quickly at a glance, so that the driver can prevent unnecessary gaze movement and drive safely. Because there is.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and its object is to display the driving information image displayed on the windshield vividly without distortion, thereby making the driving information image visible, explicit and distinctive. It is to provide a head device using multiple lenses that can improve the.

Another object of the present invention is to provide a head device using multiple lenses that enables a driver to recognize a driving information image easily and quickly by improving visibility, clarity and identification of the driving information image.

In order to achieve the above object, the head device using the multiple lens of the present invention includes a liquid crystal panel, a plurality of reflectors for sequentially reflecting a driving information image displayed on the liquid crystal panel along a specific path, and reflected through the reflectors. A head device using a multiple lens comprising an optical system for enlarging or reducing an image of a traveling information and adjusting a focus to reflect the reflected glass onto the windshield, wherein the optical system is configured to be arranged along the same optical axis sequentially from a downstream side of the reflector. And one or more lenses, each of which is a meniscus lens, and is arranged to be convex toward the liquid crystal panel side.

Preferably, the lens comprises a first lens and a second lens sequentially arranged from the downstream side of the reflector.

The first lens may be a positive maniscus lens, and the second lens may be a negative maniscus lens.

The first lens has a thickness of 18 to 20, a refractive index of 1.60 to 1.64, an Abbe number of 35 to 37, a radius of curvature of the incident surface of -133 to -139, and a radius of curvature of the exit surface of -304 to -309. The second lens has a thickness of 5 to 7, a refractive index of 1.7 to 1.9, an Abbe number of 24 to 26, a radius of curvature of the incident surface of -170 to -174, and a radius of curvature of the exit surface of -100 to -104. It is a range.

And the second lens is arranged at an air gap in the range of approximately 23 to 27 mm with the emission surface of the first lens.

According to the head device using the multiple lens according to the present invention, by improving the optical properties and the arrangement of the lens, there is an effect of correcting the distortion phenomenon of the driving information image projected on the windshield to an optimal state.

In addition, since the distortion of the driving information image projected on the windshield is corrected, the driving information image projected on the windshield can be projected with an optimal size and focus without distortion.

In addition, the driving information image can be projected with an optimal size and focus without distortion, thereby improving visibility, clarity and identification of the driving information image. Therefore, there is an effect of allowing the driver to recognize the driving information image displayed on the windshield more easily and quickly.

1 is a view showing the configuration of a conventional head device,
2 is a perspective view showing a head device using multiple lenses according to the present invention,
3 is a plan view of FIG. 2 showing a head device using multiple lenses according to the present invention;
4 is a cross-sectional view taken along line IV-IV of FIG. 3 showing a state in which a head device using multiple lenses according to the present invention is installed in a vehicle;
5A is an enlarged cross-sectional view showing a first lens constituting the head device of the present invention, and FIG. 5B is an enlarged cross-sectional view showing a second lens constituting the head device of the present invention.
6 is a view showing another embodiment of the head device using multiple lenses according to the present invention,
7 is a view showing another embodiment of the head device using multiple lenses according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the head device using multiple lenses according to the present invention will be described in detail below with reference to the accompanying drawings (the same components will be described with the same reference numerals).

First, prior to looking at the head device using a multiple lens according to the present invention, a brief description of the configuration of the head device with reference to FIGS.

The head device includes a liquid crystal panel 10 and a backlight unit 12 provided on the rear side of the liquid crystal panel 10.

The liquid crystal panel 10 is provided inside the instrument panel 10a (see FIG. 1) in front of the driver's seat, and displays an input "travel information image". The backlight unit 12 illuminates the rear surface of the liquid crystal panel 10 to provide a light source.

The head device includes an optical system 20 provided in front of the liquid crystal panel 10.

The optical system 20 enlarges or reduces the "driving information image" of the liquid crystal panel 10 to an appropriate size and adjusts the focus, and reflects the adjusted "driving information image" to the windshield 19 of the vehicle.

Next, a head device using multiple lenses according to the present invention will be described in detail with reference to FIGS. 2 to 4.

First, the head device of the present invention includes an optical system 20, which includes at least one reflector 30 that sequentially reflects a "driving information image" of the liquid crystal panel 10 along a specific path. )

The reflecting mirrors 30 include a first reflecting mirror 32 provided in front of the liquid crystal panel 10, a second reflecting mirror 34 provided in front of the first reflecting mirror 32, and a second reflecting mirror 34. A third reflecting mirror 36 is provided at the front side.

The first reflecting mirror 32 is provided toward the side surface of the liquid crystal panel 10. In particular, the liquid crystal panel 10 is arranged in a lateral direction at an angle of about 40 ° to 50 °. The first pretreatment reflector 32 thus arranged reflects the " travel information image " displayed on the liquid crystal panel 10 in the lateral direction at an angle of about 85 ° to 95 °.

The first reflecting mirror 32 may have a completely flat reflecting surface, and may have a concave curvature or a convex curvature in some cases. Various types of reflective surfaces are appropriately selected and used to correct image distortion caused by projection angle, projection distance, etc. with respect to the windshield 19.

The second reflecting mirror 34 is provided toward the side surface of the first reflecting mirror 32. In particular, it is arranged in the lateral direction at an angle of about 85 ° to 95 ° with respect to the first reflecting mirror 32. The second reflecting mirror 34 thus arranged reflects the "travel information image" reflected by the first reflecting mirror 32 in the lateral direction at an angle ranging from about 85 ° to 95 °.

The second reflecting mirror 34 may have a completely flat reflecting surface, and may have a concave curvature or a convex curvature in some cases. Various types of reflective surfaces are appropriately selected and used to correct image distortion caused by projection angle, projection distance, etc. with respect to the windshield 19.

The third reflecting mirror 36 is provided toward the side surface direction and the upper surface direction of the second reflecting mirror 34. In particular, the second reflecting mirror 34 is provided in the lateral direction at an angle of about 40 ° to 50 degrees, and the second reflecting mirror 34 is provided in the upper surface direction of about 40 degrees to 50 degrees.

The third reflecting mirror 36 thus installed reflects the "travel information image" reflected by the second reflecting mirror 34 upward. In particular, it reflects to the lens 40 mentioned later.

The third reflecting mirror 36 may have a completely flat reflecting surface, and may have a concave curvature or a convex curvature in some cases. Various types of reflective surfaces are appropriately selected and used to correct image distortion caused by projection angle, projection distance, etc. with respect to the windshield 19.

Referring again to FIGS. 2-4, the head device of the present invention includes lenses 40 for adjusting a "driving information image" reflected through the first through third reflectors 32, 34, 36. .

The lenses 40 consist of a first lens 42 and a second lens 44 which are sequentially arranged along the same optical axis from the third reflecting mirror 36.

As illustrated in FIGS. 4 and 5A, the first lens 42 includes a positive meniscus lens and is arranged to be convex toward the liquid crystal panel 10 side.

The first lens 42 has a thickness t of 18 to 20, a refractive index of Nd of 1.60 to 1.64, and an Abbe number of Vd of 35 to 37, as shown in Table 1 below and FIG. 5A. And it is preferable that the curvature radius R1 of the incident surface 42a is -133--139, and the curvature radius R2 of the exit surface 42b is -304--309.

First lens Bending Radius (R) Thickness (t) Refractive index (Nd) Abbe number (Vd) Entrance -133 ～ -139 18-20 1.60 ～ 1.64 35 to 37 Exit surface -304 ～ -309

As shown in FIGS. 4 and 5B, the second lens 44 is formed of a negative maniscus lens and is arranged to be convex toward the liquid crystal panel 10 side.

The second lens 44 is arranged such that its incidence surface 44a is spaced from the exit surface 42b of the first lens 42 with an air gap d1 in the range of approximately 23 to 27 mm.

The second lens 44 has a thickness t of 5 to 7, a refractive index Nd of 1.7 to 1.9, and an Abbe number Vd of 24 to 26, as shown in Table 2 below and FIG. 5B. And it is preferable that the curvature radius R1 of the incident surface 44a is -170--174, and the curvature radius R2 of the exit surface 44b is -100--104.

Second lens Bending Radius (R) Thickness (t) Refractive index (Nd) Abbe number (Vd) Entrance -170 ～ -174 5 to 7 1.7 to 1.9 24 ~ 26 Exit surface -100--104

According to the first and second lenses 42 and 44 having such a configuration, the "driving information image" reflected through the first and third reflectors 32, 34 and 36 is enlarged or reduced to an appropriate size and the focus is adjusted. It plays a role.

In particular, spherical aberration, astigmatism, etc. of the distorted "driving information image" through the first and third reflecting mirrors 32, 34, 36 are appropriately corrected. Thus, the "travel information image" projected onto the windshield 19 can have an optimal size and focus.

As a result, the "travel information image" displayed on the windshield 19 can be displayed clearly without distortion. This improves visibility, clarity and discrimination of the "driving information image". Thus, the driver can recognize the "travel information image" displayed on the windshield 19 more easily and quickly.

Next, FIG. 6 is a view showing another embodiment of the head device using multiple lenses according to the present invention.

Another embodiment of the head device comprises a lens 40 for adjusting the size and focus of the "driving information image", the lens 40 is a third lens (3) arranged downstream of the second lens (44) 46).

The third lens 46 is composed of a positive meniscus lens, and is arranged to be convex toward the liquid crystal panel 10 side surface.

The third lens 46 is arranged to form the same optical axis as the first and second lenses 42 and 44, but the air in the range of about 4 to 7 mm with the exit surface 44b of the second lens 44. Arranged at intervals d2.

The third lens 46 has a thickness t, a refractive index Nd, an Abbe's number Vd, and a radius of curvature of the incident surface 46a and the exit surface 46b, which is the same as that of the first lens 42. It is composed. That is, the thickness t is 18 to 20, the refractive index Nd is 1.60 to 1.64, the Abbe number Vd is 35 to 37, and the radius of curvature of the incident surface 46a is -133 to -139 and the exit surface 46b. ), The radius of curvature is preferably in the range of -304 to -309.

The third lens 46 serves to correct spherical aberration, astigmatism, and the like of the "driving information image" passing through the second lens 44. Therefore, the sharpness of the "travel information image" projected on the windshield 19 is increased.

Next, FIG. 7 is a view showing still another embodiment of the head device using multiple lenses according to the present invention.

Another embodiment of the head device further includes a preprocessing lens 48 arranged upstream of the first lens 42.

The pretreatment lens 48 is comprised by the sub meniscus lens, and is arrange | positioned so that it may be convex toward the liquid crystal panel 10 side surface.

The pretreatment lens 48 is arranged to form the same optical axis as the first and second lenses 42 and 44, but has an air gap in the range of about 4 to 7 mm from the incident surface 42a of the first lens 42. arranged for (d3).

The pretreatment lens 48 is configured such that the thickness t, the refractive index Nd, the Abbe number Vd, and the radius of curvature of the incident surface 48a and the exit surface 48b are the same as those of the second lens 44. do. That is, the thickness t is 5 to 7, the refractive index Nd is 1.7 to 1.9, the Abbe number Vd is 24 to 26, and the radius of curvature of the incident surface 48a is -170 to -174 and the exit surface 48b. ), The radius of curvature is preferably in the range of -100 to -104.

This preprocessing lens 48 corrects spherical aberration, astigmatism, and the like of the " driving information image " before being incident on the first lens 42. FIG. Therefore, the sharpness of the "travel information image" projected on the windshield 19 is increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: liquid crystal panel 12: backlight unit (Back-Light Uunt)
19: windshield 20: optical system
32: first reflector 34: second reflector
36: third reflector 42: first lens (Lens)
44: second lens 46: third lens
48: pretreatment lens

Claims (8)

delete delete delete A liquid crystal panel 10; First reflecting mirrors 32, second reflecting mirrors 34, and third reflecting mirrors 36 for sequentially reflecting the driving information image displayed on the liquid crystal panel 10 along a specific path; The first lens 42, which is a positive meniscus lens, and the second lens 44, which is a negative meniscus lens, are arranged to convex downwardly toward the third reflector 36. An optical system that enlarges or reduces the driving information image reflected through the first reflecting mirror 32, the second reflecting mirror 34, and the third reflecting mirror 36, and adjusts the focus to reflect the windshield 19. In the head device using a multiple lens comprising a (20),
The first reflecting mirror 32 is installed toward the side surface at an angle of 40 to 50 degrees with respect to the liquid crystal panel 10, and the driving information image displayed on the liquid crystal panel 10 is at a side of an angle ranging from 85 to 95 degrees. Direction,
The second reflecting mirror 34 is installed symmetrically in a lateral direction at an angle of 85 to 95 degrees with respect to the first reflecting mirror 32, and displays the traveling information image reflected by the first reflecting mirror 32 to 85 to 95 degrees. Reflects laterally in the range angle,
The third reflecting mirror 36 is installed in the lateral direction at an angle of 40 to 50 degrees with respect to the second reflecting mirror 34 and is installed toward the upper surface direction at an angle of 40 to 50 degrees with respect to the second reflecting mirror 34. To reflect the travel information image reflected by the second reflector 34 to the lens 40 in the upward direction,
The first lens 42 has a thickness t of 19 mm, a refractive index Nd of 1.62, an Abbe number Vd of 36, a radius of curvature R1 of the incident surface 42a, -136 mm, and an exit surface 42b. ) Has a radius of curvature (R2) of -306 mm,
The second lens 44 has a thickness t of 6 mm, a refractive index Nd of 1.8, an Abbe number Vd of 25, a radius of curvature R1 of the incident surface 44a of -172 mm, and an exit surface 44b. HUD device using multiple lenses, characterized in that the radius of curvature (R2) of -102mm. The method of claim 4, wherein
The second lens (44) is a head device using a multiple lens, characterized in that arranged with the air gap (d1) in the range of 23 ~ 27mm and the exit surface (42b) of the first lens (42). 6. The method of claim 5,
And further comprising a third lens 46 arranged on the downstream side of the second lens 44 to achieve the same optical axis,
The third lens 46 is a positive meniscus lens, and is arranged with an exit surface 44b of the second lens 44 and an air gap d2 in a range of 4 to 7 mm.
The third lens 46 has a thickness t of 19 mm, a refractive index Nd of 1.62, an Abbe number Vd of 36, a radius of curvature of the incident surface 46a, and a curvature of the exit surface 46b. Heard device using multiple lenses, characterized in that the radius is -306mm. The method of claim 6,
Further comprising a pre-processing lens 48 arranged to form the same optical axis upstream of the first lens 42,
The pretreatment lens 48 is a sub meniscus lens, and is arranged with an incident surface 42a of the first lens 42 at an air gap d3 in the range of 4-7 mm,
The pretreatment lens 48 has a thickness t of 6 mm, a refractive index Nd of 1.8, an Abbe number Vd of 25, a radius of curvature of the incident surface 48a of -172mm, and a radius of curvature of the exit surface 48b. Heard device using multiple lenses, characterized in that -102mm. delete

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