Display device

Abstract

To provide a display device capable of suppressing occurrence of unevenness in display luminance.SOLUTION: The display apparatus 6 includes a display 1v, and displays a virtual image 8 to a user 9 with display light reflected by a reflecting member. The display 1v includes a flat circuit substrate 2, a liquid crystal display panel 3 spaced apart from the circuit substrate 2, and a plurality of light sources 4 mounted on the circuit substrate 2. The plurality of light sources 4 include Q (Q is a natural number of 3 or more) array light sources 40 arrayed in a specific direction. Assuming that, among the Q array light sources 40, a first light source emits light that reaches the viewpoint 90 of the user 9 and has the highest reflectance on the reflection member, and a Q-th light source emits light that reaches the viewpoint 90 of the user 9 and has the lowest reflectance on the reflection member, a pitch Pn between an n-th light source and an (n + 1) - th light source adjacent to each other is narrower as a value of n is larger, where 1 ≤ n ≤ Q-1.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] Patent Document 1 describes a display device that includes a display that emits display light representing an image, and displays a virtual image of the image to a user by the display light reflected by a reflective member such as the windshield of a vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-77048 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of display device, the reflectivity of the light from the display varies depending on the position of the reflective member due to the shape of the reflective member and the relative positions of the display and the reflective member. If no countermeasures are taken, this may result in uneven display brightness of the image that is visually recognized by the user as a virtual image.

[0005] The present disclosure has been made in view of the above-described circumstances, and has an object to provide a display device that can suppress unevenness in display brightness. [Means for solving the problem]

[0006] In order to achieve the above object, the display device according to the present disclosure comprises: A display device comprising a display that emits display light representing an image, and displays a virtual image of the image to a user by the display light reflected by a reflecting member, the display device includes a flat circuit board, a liquid crystal panel positioned at an interval from the circuit board, and a plurality of light sources mounted on the circuit board to illuminate the liquid crystal panel, and emits the display light based on light from the plurality of light sources; the plurality of light sources includes Q arrayed light sources (where Q is a natural number equal to or greater than 3) arranged in a specific direction, Among the Q arrayed light sources, the light that is reflected by the reflecting member and reaches the user's viewpoint and emits light with the highest reflectance on the reflecting member is defined as a first light source, and the light that is reflected by the reflecting member and reaches the user's viewpoint and emits light with the lowest reflectance on the reflecting member is defined as a Qth light source. P is the pitch between the adjacent nth and (n+1)th light sources, where 1≦n≦Q-1. n becomes narrower as the value of n increases. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to suppress unevenness in display brightness. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram of a display device according to a first embodiment of the present disclosure. [Figure 2] FIG. 4 is a partial plan view of a circuit board for explaining an array light source. [Figure 3] FIG. 4 is a schematic cross-sectional view of a display device according to a second embodiment of the present disclosure. [Figure 4] FIG. 10 is a schematic diagram of a virtual image according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present disclosure will be described with reference to the drawings.

[0010] (First embodiment) 1 includes a circuit board 2, a liquid crystal panel 3, a light source 4, and a housing 5. The display 1 is provided, for example, on the dashboard (including the instrument panel) of a vehicle, and displays an image showing information related to the vehicle.

[0011] The circuit board 2 is a flat PCB (Printed Circuit Board). In addition to the light source 4, the circuit board 2 also has, for example, a microcontroller (not shown) that controls the operation of the display device 1 mounted thereon.

[0012] In the following description, the mutually orthogonal X, Y, and Z axes, which are set based on the circuit board 2, will be used as appropriate. The XY plane of the circuit board 2 is parallel to the main surface of the circuit board 2 (the top surface in FIG. 1). The Z axis extends in the normal direction N of the circuit board 2 (specifically, the normal direction to the main surface of the circuit board 2). The Y direction corresponds to the vertical direction of the image displayed by the display 1. The X direction corresponds to the horizontal direction of the image displayed by the display 1. Furthermore, the direction in which the arrows indicating each of the X, Y, and Z axes point is the + (plus) direction of each axis, and the opposite direction is the - (minus) direction.

[0013] The liquid crystal panel 3 is positioned at an angle to the circuit board 2, with a gap therebetween in the normal direction N of the circuit board 2. The liquid crystal panel 1 is, for example, a TFT (Thin Film Transistor) type. The liquid crystal panel 3 may be of any type, as long as it has a liquid crystal cell made of a pair of transparent substrates and a liquid crystal layer sealed between the substrates, and polarizing filters facing each other across the liquid crystal cell.

[0014] The liquid crystal panel 3 of this embodiment is flat. FIG. 1 shows a schematic cross section of the display device 1 cut parallel to the YZ plane. Hatching indicating the cross section has been omitted in FIG. 1 to make the drawing easier to read (the same applies to FIG. 3 described later). The liquid crystal panel 3 is tilted with respect to the Y axis and also tilted by θ (hereinafter, θ will be referred to as the tilt angle) with respect to the main surface of the circuit board 2. Although not shown, when the liquid crystal panel 3 is viewed in a cross section of the display device 1 cut parallel to the ZX plane, there is no tilt of the liquid crystal panel 3 with respect to the X axis.

[0015] A plurality of light sources 4 are mounted on the main surface of the circuit board 2 and illuminate the liquid crystal panel 3. Optical elements (not shown) such as a light diffusion sheet, a prism sheet, and a reflective polarizing sheet are appropriately provided between the light sources 4 and the liquid crystal panel 3.

[0016] The plurality of light sources 4 are each composed of an LED (Light-Emitting Diode) and emit light at the same brightness under the control of the microcontroller. As shown in Fig. 2, the plurality of light sources 4 are arranged at intervals in each of the X and Y directions, and form a matrix on the main surface of the circuit board 2. The arrangement of the plurality of light sources 4 will be described in detail later.

[0017] The housing 5 includes a case 50 that houses the circuit board 2 and a bezel 51 that holds the edges of the liquid crystal panel 3. In this embodiment, the case 50 and the bezel 51 are combined to form the housing 5 of the display device 1. An inner case (not shown) or the like may be provided inside the housing 5 as needed.

[0018] (Regarding the arrangement of multiple light sources 4) Because the liquid crystal panel 3 is tilted with respect to the circuit board 2 as described above, the distance between the light source 4 and the liquid crystal panel 3 in the normal direction N changes depending on the position in the Y direction. If no measures are taken, unevenness in the brightness of the light illuminating the liquid crystal panel 3 may occur, resulting in uneven display brightness of the display 1. In consideration of this problem, the multiple light sources 4 include Q (where Q is a natural number greater than or equal to 3) arrayed light sources 40 arranged in a special pattern in the Y direction. Here, if the Q arrayed light sources 40 arranged in a line in the Y direction are defined as a linear light source group 41, the multiple light sources 4 arranged on the circuit board 3 are composed of multiple linear light source groups 41 arranged at intervals in the X direction. In this embodiment, the interval between adjacent linear light source groups 41 in the X direction is constant.

[0019] Since the arrangement rules in the Y direction of each of the linear light source groups 41 are the same, the arrangement rules of the arrayed light sources 40 in one of the linear light source groups 41 will be described below.

[0020] Here, of the Q arrayed light sources 40, the one closest to the liquid crystal panel 3 in the normal direction N is referred to as the first light source, and the one farthest from the liquid crystal panel 3 in the normal direction N is referred to as the Qth light source. Note that the Q arrayed light sources 40 are gradually farther from the first light source to the Qth light source in the normal direction N. The first light source corresponds to the leftmost arrayed light source 40 in FIG. 1 and the bottommost arrayed light source 40 in FIG. 2. The Qth light source corresponds to the rightmost arrayed light source 40 in FIG. 1 and the topmost arrayed light source 40 in FIG. 2. Note that although FIGS. 1 and 2 show an example where Q=6, this example is for ease of explanation, and Q may be any natural number greater than or equal to 3.

[0021] In one linear light source group 41, 1≦n≦Q−1 is set, and P is the pitch between the adjacent n-th light source and the (n+1)-th light source. n The larger the value of n, the narrower the gap becomes. The reason why the upper limit of n is (Q-1) is because the pitch is (Q-1) in the array light source 40 in which Q light sources are arranged. Specifically, P n is the distance between the centers of adjacent array light sources 40 (the distance between the optical axis centers of adjacent array light sources 40). For example, P1 is the distance between the centers of the first and second light sources, and P Q-1 is the distance between the centers of the (Q-1)th light source and the Qth light source.

[0022] By arranging the arrayed light sources 40 as described above, the arrayed light sources 40 located in the part of the circuit board 2 that is far from the liquid crystal panel 3 in the normal direction N are closely spaced, thereby preventing unevenness in the brightness of the light illuminating the liquid crystal panel 3 and, as a result, preventing unevenness in the display brightness.

[0023] The arrangement rule for the array light source 40 will be explained more specifically. As shown in Fig. 2, the distance from the first light source to the Qth light source in the Y direction is defined as D. D is the distance between the center of the first light source and the center of the Qth light source. If Q array light sources 40 are arranged at equal intervals at this distance D, and the pitch between adjacent array light sources 40 is defined as P, then P can be expressed as P = D / (Q-1).

[0024] First, as shown in FIG. 1, the pitch P1 between the first and second adjacent light sources is set so as to satisfy the following formula (1) when the tilt angle of the liquid crystal panel 3 with respect to the circuit board 2 is θ. P1=P+(P×tanθ / 2) (1) As can be seen from equation (1), P1 is set to be larger than the virtual pitch P (P1>P).

[0025] And, for each pitch from the second light source to the Qth light source, that is, P in the range of 2≦n≦Q-1 n is set to satisfy the following equation (2). P n =P1-{P1×tanθ×(n-1) / (Q-1)} ···(2) Equation (2) is the relationship between P1 expressed by equation (1) and P n The sum of n from 2 to (Q-1) is derived so that it is approximately equal to the distance D. In other words, D ≒ P1 + P2 + + P Q-1 This concludes the description of the first embodiment.

[0026] (Modification of the first embodiment) When the liquid crystal panel 3 is viewed in a cross section of the display device 1 cut parallel to the ZX plane and an inclination of the liquid crystal panel 3 with respect to the X axis occurs, the light sources 4 that are lined up in a row in the X direction among the multiple light sources 4 can be considered to be the same as the above-mentioned arrayed light source 40, and the pitch between adjacent light sources 4 can be set. In other words, when the multiple light sources 4 are expressed as including Q (where Q is a natural number equal to or greater than 3) arrayed light sources 40 that are arrayed in a specific direction, the specific direction may be either the Y direction or the X direction.

[0027] In the above, an example has been shown in which the multiple light sources 4 include array light sources 40 arranged from one end to the other end in a specific direction (the Y direction in FIGS. 1 and 2), but this is not limited to this. As long as there are Q (where Q is a natural number equal to or greater than 3) array light sources 40 arranged in a specific direction, the portion of the multiple light sources 4 that each array light source 40 occupies is arbitrary. The portion of the multiple light sources 4 in which the array light source 40 arranged according to the rules based on Equations (1) and (2) is located is determined depending on the degree of inclination of the liquid crystal panel 3 located directly above the array light source 40 with respect to the circuit board 2.

[0028] Although the above describes an example in which the liquid crystal panel 3 is flat, the liquid crystal panel 3 may also be curved. In this case, the entire cross-sectional shape of the liquid crystal panel 3 may be approximated as a straight line tilted relative to the circuit board 2, or a specific portion may be approximated as a straight line tilted relative to the circuit board 2, and the tilt of the straight line relative to the circuit board 2, that is, the tilt angle of the liquid crystal panel 3 relative to the circuit board 2, may be regarded as θ.

[0029] (Second embodiment) 3 displays a virtual image 8 to a user 9 using a windshield 7 of a vehicle, and is configured as a so-called HUD (Head-Up Display). The user 9 is a passenger in the vehicle (particularly the driver). The display device 6 is provided, for example, on the dashboard of the vehicle, and displays an image showing information related to the vehicle.

[0030] The display device 6 includes a display 1v that emits display light that represents an image, and displays a virtual image 8 of the image to the user 9 by the display light reflected by a windshield 7 (an example of a reflective member). The portion of the windshield 7 that receives the display light from the display 1v may be a translucent portion that allows the user 9 to see the scenery ahead, or may be a portion formed with black ceramic, also known as a center visor.

[0031] The display device 1v according to the second embodiment is configured similarly to the display device 1 according to the first embodiment, and includes a circuit board 2, a liquid crystal panel 3, a light source 4, and a housing 5. However, in the display device 1v, the liquid crystal panel 3 is provided parallel to the circuit board 2. The relationship of the X, Y, and Z axes with respect to the circuit board 2 is the same as in the first embodiment. The display device 1v emits display light toward the windshield 7 based on light from a plurality of light sources 4 mounted on the circuit board 2.

[0032] A plurality of light sources 4 are mounted on the main surface of the circuit board 2 and illuminate the liquid crystal panel 3. Each of the plurality of light sources 4 is composed of an LED, and emits light at the same brightness under the control of a microcontroller (not shown) mounted on the circuit board 2. In the second embodiment, the plurality of light sources 4 will also be described with reference to FIG. 2. The plurality of light sources 4 are arranged at intervals in each of the X and Y directions, and form a matrix on the main surface of the circuit board 2. In the second embodiment, as shown in FIG. 3, the +Y direction corresponds to the rear of the vehicle, and the −Y direction corresponds to the front of the vehicle. Furthermore, the +X direction corresponds to the left side of the vehicle, and the −X direction corresponds to the right side of the vehicle.

[0033] (Regarding the arrangement of multiple light sources 4) The windshield 7, which serves as a reflective member, is curved and often made of cubic curved glass. Therefore, the reflectivity of light from the display 1v typically varies depending on the position on the windshield 7. If no countermeasures are taken, unevenness in the display brightness of the image viewed by the user 9 as a virtual image 8 may occur. In consideration of this problem, the multiple light sources 4 include Q (where Q is a natural number greater than or equal to 3) arrayed light sources 40 arranged in a specific pattern in the Y direction. If the Q arrayed light sources 40 arranged in a line in the Y direction are defined as a linear light source group 41, the multiple light sources 4 arranged on the circuit board 3 are composed of multiple linear light source groups 41 spaced apart in the X direction. The arrangement pattern of the arrayed light sources 40 in one linear light source group 41 will be described below. The spacing between adjacent linear light source groups 41 in the X direction will be described later.

[0034] Here, of the Q array light sources 40, the one that emits light that is reflected by the windshield 7 and reaches the viewpoint 90 of the user 9 and has the highest reflectivity on the windshield 7 is referred to as the first light source, and the one that emits light that is reflected by the windshield 7 and reaches the viewpoint 90 and has the lowest reflectivity on the windshield 7 is referred to as the Qth light source. The first light source corresponds to the array light source 40 located on the leftmost side in FIG. 3 and the array light source 40 located at the bottom in FIG. 2. The Qth light source corresponds to the array light source 40 located on the rightmost side in FIG. 3 and the array light source 40 located at the topmost side in FIG. 2. The viewpoint 90 of the user 9 may be predetermined as any three-dimensional coordinate within the vehicle within the range of an eye box set within the vehicle as a range within which the virtual image 8 is visible.

[0035] The angle of incidence β2 of light emitted from the Qth light source onto the windshield 7 is smaller than the angle of incidence β1 of light emitted from the first light source onto the windshield 7. Here, the reflectance of light emitted from the Qth light source, reflected by the windshield 7, and reaching the viewpoint 90 is defined as α2, and the reflectance of light emitted from the first light source, reflected by the windshield 7, and reaching the viewpoint 90 is defined as α1. Then, since the relationship β2<β1 holds, α2<α1. Note that the reflectance of light emitted from the Q arrayed light sources 40 onto the windshield 7 gradually decreases from the first light source toward the Qth light source. Also, although an example where Q=6 is shown in FIGS. 3 and 2, this example is for ease of explanation, and Q can be any natural number greater than or equal to 3.

[0036] FIG. 4 schematically shows the outline of the virtual image 8 as seen by the user 9. In the virtual image 8, points marked with reflectance α2 indicate positions corresponding to light emitted from the Qth light source and incident on the windshield at an incident angle β2. In addition, points marked with reflectance α1 indicate positions corresponding to light emitted from the 1st light source and incident on the windshield at an incident angle β1. If no countermeasures are taken, the points marked with reflectance α2 in the virtual image 8 will have lower display brightness than the points marked with reflectance α1. To prevent this, the pitch of one row of light source groups 41 is determined as follows:

[0037] In one linear light source group 41, 1≦n≦Q−1 is set, and P is the pitch between the adjacent n-th light source and the (n+1)-th light source. n The larger the value of n, the narrower it becomes. n is the distance between the centers of adjacent array light sources 40 (the distance between the optical axis centers of adjacent array light sources 40). For example, P1 is the distance between the centers of the first and second light sources, and P Q-1 is the distance between the centers of the (Q-1)th light source and the Qth light source.

[0038] By arranging the arrayed light sources 40 as described above, the arrayed light sources 40 that emit light with a relatively low reflectance on the windshield 7 are closely spaced on the circuit board 2, thereby preventing unevenness in the display brightness of the image that is viewed by the user 9 as a virtual image 8.

[0039] The arrangement rule for the array light source 40 will be explained more specifically. As shown in Fig. 2, the distance from the first light source to the Qth light source in the Y direction is defined as D. D is the distance between the center of the first light source and the center of the Qth light source. If Q array light sources 40 are arranged at equal intervals at this distance D, and the pitch between adjacent array light sources 40 is defined as P, then P can be expressed as P = D / (Q-1).

[0040] First, P1, which is the pitch between the adjacent first and second light sources, is set to satisfy the following equation (3), where α2 is the reflectance of the light emitted by the Qth light source on the windshield 7, α1 is the reflectance of the light emitted by the first light source on the windshield 7, and α=(α1 / α2)-1. P1=P+(P×α / 2) (3) As can be seen from equation (3), P1 is set to be larger than the virtual pitch P (P1>P).

[0041] And, for each pitch from the second light source to the Qth light source, that is, P in the range of 2≦n≦Q-1 n is set to satisfy the following equation (4). P n =P1-{P1×α×(n-1) / (Q-1)} ···(4) Equation (4) is the sum of P1 expressed by equation (3) and P n The sum of n from 2 to (Q-1) is derived so that it is approximately equal to the distance D. In other words, D ≒ P1 + P2 + + P Q-1 is.

[0042] The above has described one arbitrary linear light source group 41, but for other linear light source groups 41, the pitch in the Y direction of the arrayed light sources 40 constituting each linear light source group 41 may be determined using the same method as for that one linear light source group 41. Note that the pitch in the Y direction of the arrayed light sources 40 may be determined using the above-described method for only one representative linear light source group 41, and the other linear light source groups 41 may be configured with the same pitch in the Y direction as the pitch in the representative one linear light source group 41.

[0043] The above has described the array light sources 40 arranged in the Y direction, but with regard to the pitch in the X direction of the multiple light sources 4, the light sources 4 arranged in a row in the X direction among the multiple light sources 4 can be considered to be the same as the above-mentioned array light source 40, and the pitch between adjacent light sources 4 can be set. In other words, when the multiple light sources 4 are expressed as including Q (where Q is a natural number of 3 or more) array light sources 40 arranged in a specific direction, the specific direction may be either the Y direction or the X direction.

[0044] When determining the pitch of the array light sources 40 arranged in the Y direction, the reflectances α1 and α2 on the windshield 7 corresponding to two positions on the virtual image 8 spaced apart in the vertical direction were considered, as shown in Figure 4. Similarly, when determining the pitch of the array light sources 40 arranged in the X direction, the reflectances α1 and α3 on the windshield 7 corresponding to two positions on the virtual image 8 spaced apart in the horizontal direction should be considered.

[0045] Although not shown, the pitch in the X direction of the array light source 40 will be described below using the same symbols as in the description of the pitch in the Y direction of the array light source 40.

[0046] Of the Q arrayed light sources 40 lined up in the X direction, the one that emits light that is reflected by the windshield 7 and reaches the viewpoint 90 and has the highest reflectance from the windshield 7 is referred to as the first light source, and the one that emits light that is reflected by the windshield 7 and reaches the viewpoint 90 and has the lowest reflectance from the windshield 7 is referred to as the Qth light source. Here, the reflectance from the windshield 7 of light emitted from the Qth light source and reflected by the windshield 7 and reaches the viewpoint 90 is referred to as α2, and the reflectance from the windshield 7 of light emitted from the first light source and reflected by the windshield 7 and reaches the viewpoint 90 is referred to as α3 (note that α2<α3). Note that the reflectance from the windshield 7 of light emitted by the Q arrayed light sources 40 gradually decreases from the first light source to the Qth light source.

[0047] The distance from the first light source to the Qth light source in the X direction is defined as D. If Q arrayed light sources 40 are arranged at equal intervals at this distance D, and the pitch between adjacent arrayed light sources 40 is defined as P, then P can be expressed as P=D / (Q-1).

[0048] First, P1, which is the pitch between the first and second adjacent light sources, may be set so as to satisfy the following formula (5) when α=(α3 / α2)−1. P1=P+(P×α / 2) (5)

[0049] And, for each pitch from the second light source to the Qth light source, that is, P in the range of 2≦n≦Q-1 n is set to satisfy the following equation (6). P n =P1-{P1×α×(n-1) / (Q-1)} ···(6)

[0050] In the above, when describing the pitch of the array light source 40 in the Y direction and the pitch in the X direction, the distance D, the number Q of the array light source 40, etc. have been described using the same symbols, but it goes without saying that the distance D, the number Q, etc. may have different values ​​in the Y direction and the X direction. This concludes the description of the second embodiment.

[0051] (Modification of the second embodiment) In the second embodiment, an example has been described in which the liquid crystal panel 3 is provided parallel to the circuit board 2. However, in the display device 6, as in the first embodiment, the liquid crystal panel 3 may also be tilted by an angle θ with respect to the circuit board 2. In this case, the pitch of the arrayed light sources 40 in the Y direction can be determined as follows.

[0052] P calculated using the formulas (1) and (2) in the first embodiment n If P1 is the pitch of the oscillating instrument and A1 is the rate of change of P1 with respect to the virtual pitch P, then A1 = P1 / P. Q-1 It is calculated according to each of the following.

[0053] P calculated using equations (3) and (4) in the second embodiment n If P2 is the pitch of the oscillating instrument, and A2 is the rate of change of P2 relative to the virtual pitch P, then A2 = P2 / P. Q-1 It is calculated according to each of the following.

[0054] By calculating the pitch Pw, which takes these change rates into consideration, using the formula Pw = (A1 x A2) x P, it is possible to determine the pitch of the array light source 40 in the Y direction, taking into account both the tilt of the liquid crystal panel 3 and the reflectance of light on the windshield 7. Note that Pw is calculated for each pitch between adjacent array light sources 40. Also, although the derivation of the pitch of the array light source 40 in the Y direction has been described here, it goes without saying that the pitch of the array light source 40 in the X direction can also be derived using a similar method.

[0055] The following table shows specific examples of A1, A2, and Pw for each pitch between adjacent arrayed light sources 40 among the Q arrayed light sources 40. Note that n is the number of pitches occurring among the Q arrayed light sources 40, and 1≦n≦Q−1. In other words, the following table shows specific examples of seven pitches Pw occurring among eight arrayed light sources 40.

[0056] [Table 1]

[0057] The present invention is not limited to the above-described embodiments, modifications, and drawings. Modifications (including the omission of components) can be made as appropriate within the scope of the present invention.

[0058] In the second embodiment, the positions on the windshield 7 where the reflectances are α1, α2, and α3 are described. However, it is also possible to select more points on the windshield 7 where the reflectances are different from each other, and determine the pitch of the array light source 40 in a specific direction by taking into account the difference in reflectance between each point.

[0059] The display device 6 according to the second embodiment may include one or more mirrors between the display 1v and the windshield 7 to guide display light from the display 1v to the windshield 7. Even in this configuration, the pitch of the array light sources 40 in a specific direction can be determined in the same manner as in the second embodiment, taking into account the reflectance of the windshield 7 of light traveling from one array light source 40 to the viewpoint 90.

[0060] In the above description, in order to facilitate understanding of the present disclosure, descriptions of well-known technical matters have been omitted as appropriate.

[0061] This invention allows various embodiments and modifications without departing from the broad spirit and scope of this invention. Furthermore, the above-described embodiments are intended to explain this invention and do not limit the scope of this invention. That is, the scope of this invention is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and the meaning of the invention equivalent thereto are considered to be within the scope of this invention. [Explanation of symbols]

[0062] 1,1v…Indicator 2...Circuit board 3...LCD panel 4...light source, 40...array light source, 41...array light source group 5... Housing, 50... Case, 51... Bezel 6…Display device 7...Windshield (an example of a reflective material) 8...Illusion 9...user, 90...perspective

Claims

1. A display device comprising a display that emits display light representing an image, and displays a virtual image of the image to a user by the display light reflected by a reflecting member, the display device includes a flat circuit board, a liquid crystal panel positioned at an interval from the circuit board, and a plurality of light sources mounted on the circuit board to illuminate the liquid crystal panel, and emits the display light based on light from the plurality of light sources; the plurality of light sources include Q arrayed light sources (where Q is a natural number equal to or greater than 3) arranged in a specific direction, Among the Q arrayed light sources, a light source that emits light that is reflected by the reflecting member and reaches the user's viewpoint and has the highest reflectance on the reflecting member is defined as a first light source, and a light source that emits light that is reflected by the reflecting member and reaches the user's viewpoint and has the lowest reflectance on the reflecting member is defined as a Qth light source. P is the pitch between the adjacent nth light source and the (n+1)th light source, where 1≦n≦Q−1. ｎ The larger the value of n, the narrower it becomes. Display device.

2. The reflectance of the light emitted from the first light source at the reflecting member is defined as α1, The reflectance of the light emitted by the Qth light source at the reflecting member is α2, If α = (α1 / α2)-1, then P in the range of 2≦n≦Q−1 ｎ teeth, P ｎ =P １ -{P １ ×α×(n-1) / (Q-1)} fulfill, The display device according to claim 1 .

3. If the distance from the first light source to the Qth light source in the specific direction is D, then P=D / (Q−1), P １ =P+(P×α / 2) fulfill, The display device according to claim 2 .

Images