Display device

Abstract

To prevent a reverse view image from being seen when performing an aerial operation for a stereoscopic image.SOLUTION: The display device includes a display panel, a display region for displaying an image output from the display panel, a parallax barrier for causing an image output from the display region to be visually recognized as a parallax image, and a sensor provided to overlap with the parallax barrier, and can visually recognize a stereoscopic image within a predetermined angle range including a front surface of the display region and cannot visually recognize another image other than the stereoscopic image outside the predetermined angle range.SELECTED DRAWING: Figure 10

Description

[Technical Field]

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

[0002] BACKGROUND ART Display devices are known that provide a parallax barrier between a liquid crystal display panel and a light source to block part of the light projected from the light source onto the liquid crystal display panel, thereby enabling a 3D (three dimensions) image to be viewed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-175875 Summary of the Invention [Problem to be solved by the invention]

[0004] By overlaying various sensors on a parallax barrier, a display device with added value can be realized. When sensors are overlaid on a parallax barrier, images from adjacent pixels may appear as ghosts (hereinafter referred to as inverted images) outside the range where a 3D image, i.e., a stereoscopic image, can be seen. When performing mid-air operations on a stereoscopic image, the appearance of inverted images can lead to unexpected operations, which is undesirable.

[0005] The present invention has been made in view of the above, and an object of the present invention is to provide a display device that can prevent a reversed image from being seen when performing an aerial operation on a stereoscopic image. [Means for solving the problem]

[0006] A display device according to one aspect of the present disclosure includes a display panel, a display area that displays an image output by the display panel, a parallax barrier that allows the image output by the display area to be viewed as a parallax image, and a sensor that is superimposed on the parallax barrier, and allows a stereoscopic image to be viewed within a predetermined angle range that includes the front of the display area, while preventing any other image other than the stereoscopic image from being viewed outside the predetermined angle range. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing the mechanism of a display device that produces a stereoscopic view. [Figure 2] FIG. 2 is a schematic diagram showing the optical axes of light from the first panel for a plurality of viewpoints. [Figure 3] FIG. 3 is a diagram illustrating an example of the configuration of the sensor unit. [Figure 4] FIG. 4 is a diagram showing the display device according to the first embodiment. [Figure 5] FIG. 5 is a schematic diagram showing a schematic cross-sectional configuration of a detection system to which the display device according to the first embodiment is applied. [Figure 6] FIG. 6 is a block diagram showing an example of the configuration of the detection unit of the display device according to the first embodiment. [Figure 7] FIG. 7 is a schematic diagram showing the positional relationship between the position of the object to be detected in the space above the detection region and each electrode. [Figure 8] FIG. 8 is a schematic diagram showing the spatial coordinates of the object to be detected in the space above the detection area. [Figure 9] FIG. 9 is a flowchart showing an example of processing by the processing circuit. [Figure 10] FIG. 10 is a diagram showing a display device according to the second embodiment. [Figure 11] FIG. 11 is a schematic diagram showing a schematic cross-sectional configuration of a display system to which the display device according to the second embodiment is applied. [Figure 12] FIG. 12 is a diagram illustrating the concept of display according to the second embodiment. [Figure 13]FIG. 13 is a diagram illustrating the concept of display according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Modes (embodiments) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the contents described in the following embodiments. Furthermore, the components described below include those that can be easily imagined by a person skilled in the art and those that are substantially identical. Furthermore, the components described below can be combined as appropriate. Note that the disclosure is merely an example, and appropriate modifications that a person skilled in the art can easily conceive while maintaining the gist of the invention are naturally included within the scope of the present invention. Furthermore, for clarity of explanation, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual embodiment. However, these are merely examples and are not intended to limit the interpretation of the present invention. Furthermore, in this specification and each figure, elements similar to those described above with reference to the previous figures may be designated by the same reference numerals, and detailed descriptions may be omitted as appropriate.

[0009] (How stereoscopic vision works) Before describing the embodiments, the mechanism of a display device that produces a stereoscopic view will be described with reference to FIGS.

[0010] Fig. 1 is a schematic diagram showing the mechanism of a display device that produces a stereoscopic view. Fig. 2 is a schematic diagram showing optical axes R1, R2, ..., Rn of light from a first panel 40 relative to multiple viewpoints E1, E2, ..., En.

[0011] A pixel 48 shown in FIGS. 1 and 2 has a first subpixel 49R, a second subpixel 49G, and a third subpixel 49B. Hereinafter, the term "subpixel 49" encompasses the first subpixel 49R, the second subpixel 49G, and the third subpixel 49B. A plurality of pixels 48 are provided on the first panel 40. The first panel 40 displays and outputs an image by controlling the brightness of the subpixels 49 of each of the plurality of pixels 48. Hereinafter, two directions along the image display surface of the first panel 40 on which the plurality of pixels 48 are provided are referred to as a first direction Dx and a second direction Dy. The first direction Dx and the second direction Dy are orthogonal to each other. Furthermore, a direction orthogonal to the first direction Dx and the second direction Dy is referred to as a third direction Dz.

[0012] 1 illustrates a so-called stripe-type color pixel in which the sub-pixels 49 are arranged in the order of the first sub-pixel 49R, the second sub-pixel 49G, and the third sub-pixel 49B in a rectangular pixel 48 from one side to the other in the first direction Dx, but the arrangement and shape of the sub-pixels 49 of the pixel 48 are not limited to this and can be changed as appropriate. Also, Fig. 1 and other figures illustrate a pixel 48 that achieves color display output by having the first sub-pixel 49R output red (R), the second sub-pixel 49G output green (G), and the third sub-pixel 49B output blue (B), but the color combination and number of colors of the sub-pixels 49 of the pixel 48 are not limited to this and can be changed as appropriate.

[0013] A parallax barrier is formed between the first panel 40 and viewpoints E1, E2, ..., En of a user who views light from the first panel 40 and recognizes an image. The parallax barrier includes, for example, a light shielding body PB1, a light shielding body PB2, and an opening formed between the light shielding body PB1 and the light shielding body PB2, as shown in FIGS. 1 and 2. The opening is a slit that does not have a light shielding body and extends in a predetermined direction to transmit light. Hereinafter, the opening may be referred to as a slit. In FIGS. 1 and 2, the opening width of the opening in the first direction Dx is defined as width L2.

[0014] The light shielding body PB1 and the light shielding body PB2 block light between the first panel 40 and the viewpoints E1, E2, ..., En. Therefore, of the light traveling from the first panel 40 toward the viewpoints E1, E2, ..., En, the light having the light shielding body PB1 or the light shielding body PB2 on its optical axis is blocked and is not visible to the user.

[0015] FIG. 2 schematically shows optical axes R1, R2, ..., Rn of light traveling from the first panel 40 toward the viewpoints E1, E2, ..., En through the openings of the parallax barrier. Optical axis R1 is the optical axis of light traveling from the first sub-pixel 49R toward the viewpoint E1. Optical axis R2 is the optical axis of light traveling from the second sub-pixel 49G toward the viewpoint E2. Optical axis Rn is the optical axis of light traveling from the third sub-pixel 49B toward the viewpoint En. Two of the viewpoints E1, E2, ..., En correspond to the viewpoints of the two eyes of a user (human). In this way, the optical axes R1, R2, ..., Rn of light traveling from each of the multiple sub-pixels 49 toward different viewpoints E1, E2, ..., En establish stereoscopic vision. Furthermore, by changing the relative position of the user with respect to the first panel 40 and the parallax barrier, different stereoscopic images can be viewed from different viewpoints.

[0016] The number (n) of optical axes R1, R2, ..., Rn is an arbitrary natural number. The larger the number n, the more viewpoints E1, E2, ..., En can be used for stereoscopic viewing.

[0017] The incident angle range θ0 of light entering the opening of the parallax barrier and the exit angle range θ1 of light that can pass from the first panel 40 through the opening of the parallax barrier toward viewpoints E1, E2, ..., En depend on the width L2 and the distance L3 between the first panel 40 and the parallax barrier. The exit angle range L1 of the first panel 40 that can emit light through one opening in the parallax barrier is determined according to the exit angle range θ1. The exit angle range θ1 depends on the panel design (pixel size, etc.), but is preferably in the range of approximately 10° to 160°. If the exit angle range θ1 is less than 10°, the position where stereoscopic vision is possible with both eyes becomes extremely narrow, which is undesirable. If the exit angle range θ1 is greater than 160°, the distance G between the sensor unit 10 and the panel unit 200, which is necessary to view a stereoscopic image, must be extremely narrow, which is likely to be structurally unfeasible. Furthermore, the coordinate change on the pixel surface is reduced, and the light density is significantly reduced, which is undesirable. The emission range L1 indicates the width in the first direction Dx. The width of the emission range L1 in the first direction Dx is greater than the width L2.

[0018] A sensor unit 10 is provided on the third direction Dz side of the parallax barrier including the light shielding body PB1 and the light shielding body PB2. Fig. 3 is a diagram showing an example of the configuration of the sensor unit 10. The sensor unit 10 has a sensor substrate 11, a plurality of electrodes 12 provided in a detection area AA of the sensor substrate 11, and wiring 13 extending from each of the plurality of electrodes 12. The sensor unit 10 is connected to a detection unit 20. The detection unit 20 has a control substrate 21, a detection circuit 22, a processing circuit 23, a power supply circuit 24, and an interface circuit 25.

[0019] The detection area AA of the sensor substrate 11 is an area where a plurality of electrodes 12 arranged in a matrix in the Dx direction (first direction) and the Dy direction (second direction) are provided. The sensor substrate 11 is, for example, a glass substrate or a light-transmitting flexible printed circuit (FPC).

[0020] The display device according to this embodiment has a function of detecting the position of a detectable object present in the space above the detection area AA of the sensor substrate 11 and calculating the coordinates of the detectable object. In this disclosure, the Dx direction (first direction) and the Dy direction (second direction) are orthogonal to each other in the detection area AA. In this disclosure, the direction orthogonal to the Dx direction (first direction) and the Dy direction (second direction) is defined as the Dz direction (third direction).

[0021] In the example shown in Figure 3, five electrodes 12 are arranged in the Dx direction and four electrodes 12 are arranged in the Dy direction, resulting in a total of 5 x 4 (= 20) electrodes 12, but the number of electrodes 12 arranged in the detection area AA of the sensor substrate 11 is not limited to this.

[0022] The control board 21 is electrically connected to the sensor board 11 via a wiring board 31. The wiring board 31 is, for example, a flexible printed circuit board. Each electrode 12 of the sensor unit 10 is connected to a detection circuit 22 of the detection unit 20 via the wiring board 31.

[0023] The control board 21 is provided with a detection circuit 22, a processing circuit 23, a power supply circuit 24, and an interface circuit 25. The control board 21 is, for example, a rigid board.

[0024] The detection circuit 22 generates a detection value of each electrode 12 based on the detection signal of each electrode 12 output from the sensor substrate 11. The detection circuit 22 is, for example, an analog front end (AFE) IC.

[0025] The processing circuit 23 generates spatial coordinates indicating the position of the object to be detected (for example, the operator's finger) in the detection area AA based on the detection values ​​of each electrode 12 output from the detection circuit 22. The processing circuit 23 may be, for example, a PLD (Programmable Logic Device) such as an FPGA (Field Programmable Gate Array), or may be, for example, an MCU (Micro Control Unit).

[0026] The power supply circuit 24 is a circuit that supplies power to the detection circuit 22 and the processing circuit 23 .

[0027] The interface circuit 25 is, for example, a USB (Universal Serial Bus) controller IC, and is a circuit that controls communication between the processing circuit 23 and a host controller (not shown) of a host device in which the detection system is installed.

[0028] (First embodiment) In a display device including the sensor unit 10 described above, an inverted image may be seen outside the area (viewing zone) where a stereoscopic image is visible. A configuration for preventing this inverted image from being seen will be described with reference to FIG. 4. FIG. 4 is a diagram showing a display device according to a first embodiment. FIG. 4 shows a configuration for preventing the inverted image from being seen. In FIG. 4, a parallax barrier unit PB including light shields PB1 and PB2 is provided at a distance G in the Dz direction from the display panel 200. The sensor unit 10 is also provided overlapping the parallax barrier unit. Note that in FIG. 4, the number P of pixels used in one opening of the parallax barrier unit PB among the pixels constituting the display panel 200 is an integer multiple of the number of subpixels SP.

[0029] Here, the thickness t of the parallax barrier portion, i.e., the light blocking bodies PB1 and PB2, is determined so that the reverse optical image is not visible. The thickness t is the thickness in the direction from the display panel 200 toward the sensor 10. For example, the thickness t is determined according to the following formula (1). t≧(2×S×G) / (PS)…(1)

[0030] In formula (1), "S" is the aperture width of the parallax barrier, "G" is the distance between the parallax barrier and the display panel 200, and "P" is the number of pixels constituting the display panel 200 used in one aperture of the parallax barrier section PB. By determining the thickness t according to formula (1), the following effects can be obtained. In the configuration shown in FIG. 4, angular range 50 is a region that includes the front of the display area. When the viewpoint moves within angular range 50 as indicated by arrow Y2, a stereoscopic image can be viewed from viewpoints E2 to En-1 within angular range 50. In contrast, at viewpoints 1 and En outside angular range 50, the stereoscopic image cannot be viewed, and an image other than the stereoscopic image, i.e., an inverted image, cannot be viewed. The above formula (1) is merely an example. Even if the values ​​differ from formula (1) due to the influence of the barrier material, the tapered shape of the slit section, etc., there is no problem as long as the inverted image cannot be viewed due to the barrier thickness.

[0031] 4, in this example, the opening width of the parallax barrier unit PB formed by the light blocking members PB1 and PB2 is tapered so that the width on the sensor 10 side is larger than the width on the display panel 200 side. The width on the display panel 200 side is defined as the opening width S in formula (1). The tapered shape differs depending on the manufacturing method and usage direction of the barrier, i.e., whether the barrier film is used with the upper or lower side. For this reason, contrary to the tapered shape shown in FIG. 4, there may be cases where the width on the sensor 10 side is smaller than the width on the display panel 200 side. In either case, the opening width S of the parallax barrier unit PB is determined by the thickness position where it is narrowest.

[0032] FIG. 5 is a schematic diagram showing a schematic cross-sectional configuration of a display system to which the display device according to the first embodiment is applied.

[0033] The display system 100 includes a display device 1 and a display panel 200. The display panel 200 corresponds to a display area that displays an image. The display panel 200 is disposed opposite a sensor unit 10 of the display device 1 via an air gap AG. The sensor unit 10 of the display device 1 is disposed such that a detection area AA of the sensor unit 10 and a display area DA of the display panel 200 overlap in the Dz direction (third direction) in a plan view. The display panel 200 is exemplified by a liquid crystal display (LCD). The display panel 200 may be, for example, an organic light emitting diode (OLED), an inorganic light emitting diode (micro LED, mini LED), or a transparent display that displays an image on a transparent display surface.

[0034] The sensor unit 10 includes a sensor substrate 11, an electrode 12, a shield 14, and a cover glass 15. The sensor unit 10 is stacked in the following order from the display panel 200 side: parallax barrier unit PB, shield 14, sensor substrate 11, electrode 12, and cover glass 15. Hereinafter, the surface of the cover glass 15 provided on the top layer will also be referred to as the "detection surface SS." Note that the detection surface SS is not limited to the surface of the cover glass 15. In the present disclosure, the detection surface SS is a reference surface for defining the distance to the object to be detected in the Dz direction (third direction), and may be, for example, the surface of the electrode 12.

[0035] The shield 14 is provided on a first surface of the sensor substrate 11 facing the display panel 200. The electrode 12 is provided on a second surface of the sensor substrate 11, behind the first surface. The electrode 12 has, for example, a mesh structure made of thin metal wires. The mesh structure made of thin metal wires makes the thin metal wires invisible while allowing light from the display panel 200 to pass through the spaces between the thin metal wires. The cover glass 15 is provided on the second surface of the sensor substrate 11 via an adhesive layer OC. The adhesive layer OC is preferably made of a light-transmitting adhesive. The adhesive layer OC may be formed of a light-transmitting film with double-sided adhesive properties, such as OCA (Optical Clear Adhesive). A parallax barrier unit PB is provided on the display panel 200 side of the shield 14 to implement light shields PB1 and PB2 (see FIG. 2). The parallax barrier unit PB is provided so as to overlap the display panel 200 via an air gap AG. The parallax barrier unit PB allows the image output from the display area to be viewed as a parallax image.

[0036] 6 is a block diagram showing an example of the configuration of the detection unit of the display device according to Embodiment 1. In the present disclosure, the detection unit 20 calculates the coordinates of the object to be detected in space above the detection area AA.

[0037] 6, the detection unit 20 includes a signal detection unit 42, an A / D conversion unit 43, and a coordinate calculation unit 44. The signal detection unit 42 and the A / D conversion unit 43 are included in the detection circuit 22. The coordinate calculation unit 44 is included in the processing circuit 23.

[0038] The signal detection unit 42 generates an output value Rawdata(n) of each electrode 12 based on a detection signal Det(n) (n is a natural number from 1 to N, and N is the number of electrodes in the detection area AA) of each electrode 12 output from the sensor substrate 11. The A / D conversion unit 43 samples the output value of each electrode 12 and converts it into a digital signal.

[0039] The coordinate calculation unit 44 calculates the spatial coordinates R (Rx, Ry, Rz) of the position where the object to be detected exists based on the output value Rawdata(n) of each electrode 12.

[0040] Fig. 7 is a schematic diagram showing the positional relationship between the position of the object to be detected in the space above the detection area and each electrode. Fig. 8 is a schematic diagram showing the spatial coordinates of the object to be detected in the space above the detection area. Figs. 7 and 8 show an example in which a target TG exists in the space above the detection area AA as a stereoscopic image.

[0041] 7, in this example, twelve electrodes 12 are provided in the detection area AA. The target TG is, for example, a 3D image of a push button. When a detectable object F, such as an operator's finger, approaches the target TG as indicated by arrow Y1 to operate the push button, a capacitance corresponding to the distance between the detectable object F present in the space above the detection area AA and each electrode 12 is generated in each electrode 12 in the detection area AA, and an output value Rawdata(n) corresponding to the capacitance is acquired by the detection circuit 22. In other words, the sensor unit 10 outputs the value of the capacitance generated between the electrode 12 and the detectable object F.

[0042] The processing circuit 23 uses the output value Rawdata(n) of each electrode 12 generated by the detection circuit 22 to extract spatial coordinates R (Rx, Ry, Rz) indicating the position of the object to be detected F in the space above the detection area AA shown in Figure 8.

[0043] In the present disclosure, spatial coordinates R (Rx, Ry, Rz) correspond to the position of a detectable object F present in space above the detection surface SS. The spatial coordinates R (Rx, Ry, Rz) include first data Rx in the X direction corresponding to the position in the Dx direction (first direction) on the detection area AA, second data Ry in the Y direction corresponding to the position in the Dy direction (second direction) on the detection area AA, and third data Rz in the Z direction corresponding to the position in the Dz direction (third direction) perpendicular to the Dx direction (first direction) and the Dy direction (second direction).

[0044] The processing circuit 23 outputs the coordinates calculated by the coordinate calculation unit 44. The coordinates calculated by the coordinate calculation unit 44 are transmitted to the host device via the interface circuit 25. The host device performs control according to the coordinates transmitted from the processing circuit 23. Specifically, the host device executes processing in response to the selection of a target TG, such as an image of a push button. Note that the present disclosure is not limited to the processing on the host device side.

[0045] (Example of processing by a processing circuit) 9 is a flowchart showing an example of processing by the processing circuit 23. In this example, different coordinates are calculated depending on whether the operation mode is a 2D (two dimensions) mode or a 3D mode. The 2D mode is an operation mode in which a 2D image is displayed. The 3D mode is an operation mode in which a 3D image is displayed.

[0046] 9, the processing circuit 23 determines whether the current operation mode is the 3D mode (step S101). If the result of the determination in step S101 is that the current operation mode is the 3D mode (Yes in step S101), the process proceeds to step S102, and a 3D mode display is performed (step S102).

[0047] During 3D mode display, it is determined whether or not a detectable object such as a finger has been detected (step S103). If the result of the determination in step S103 is that a detectable object has been detected (Yes in step S103), the process proceeds to step S104, where the spatial coordinates of the detectable object are calculated (step S104). The calculated coordinates are output to the host device (step S105).

[0048] If it is determined in step S103 that a detectable object has not been detected (No in step S103), the display in 3D mode continues (step S102), and it continues to determine whether a detectable object has been detected (step S103).

[0049] If the result of the determination in step S101 is that the current operation mode is not 3D mode (No in step S101), it is determined whether the current operation mode is 2D mode (step S106).If the result of the determination in step S106 is that the current operation mode is 2D mode (Yes in step S106), the process proceeds to step S107, and a 2D mode display is performed (step S107).

[0050] When displaying in 2D mode, it is determined whether or not a detectable object such as a finger has been detected (step S108). If the result of the determination in step S108 is that a detectable object has been detected (Yes in step S108), coordinates on the surface of the detection plane are calculated (step S109). The calculated coordinates are output to the host device (step S105).

[0051] If the result of the determination in step S108 is that the object to be detected has not been detected (No in step S108), the display in 2D mode continues (step S107), and the determination of whether the object to be detected has continued (step S108).

[0052] If the result of the determination in step S106 is that the current operation mode is not the 2D mode (No in step S106), the process returns to step S101, and a determination is made regarding the current operation mode (step S101).

[0053] As described above, the processing circuit 23 performs processing according to the operation mode, thereby calculating coordinates according to the current operation mode and outputting the detected coordinates to the host device. For example, when displaying in 3D mode, the spatial coordinates of a normal 3D image are known, so if the host device detects an object at a spatial coordinate other than that of a normal 3D image, it can determine this. As a result, the movement of the object in the 3D display area is reflected in the control, but the movement of the object in other areas can be ignored. In this way, the host device can perform control according to the coordinates.

[0054] (Second embodiment) FIG. 10 is a diagram showing a display device according to a second embodiment. FIG. 10 shows the range in which a reverse optical image is visible and the configuration for making it invisible. The display device shown in FIG. 10 has a configuration in which a half mirror HM is superimposed on the outermost surface of the sensor unit 10. In this respect, the second embodiment differs from the first embodiment in configuration. When the backlight of the display panel 200 is turned on, the half mirror HM transmits light from the display panel 200 while reducing the amount of light. When the backlight of the display panel 200 is not turned on, the half mirror HM reflects light from the front.

[0055] In the second embodiment, equation (1) is not used to determine the thickness of the parallax barrier. In the second embodiment, the thickness of the parallax barrier is smaller than in the first embodiment. Therefore, the angle range 51 in the second embodiment is wider than the angle range 50 (see FIG. 4) in the first embodiment. In the configuration shown in FIG. 10, when the viewpoint moves as indicated by the arrow Y3, a stereoscopic image can be viewed from viewpoint E1 to viewpoint En within the angle range 51. In contrast, at viewpoints outside the angle range 51, the stereoscopic image cannot be viewed, and since the light amount can be reduced by the half mirror HM, an image other than the stereoscopic image, i.e., an inverted optical image, cannot be viewed.

[0056] FIG. 11 is a schematic cross-sectional view of a display system 100A to which a display device according to a second embodiment is applied. Referring to FIG. 11, the second embodiment has a configuration in which a half mirror HM is superimposed on a cover glass 15 of a sensor unit 10. The half mirror HM is provided closest to the viewer. The parallax barrier unit PB is provided between the display panel 200 and the half mirror HM. The half mirror HM is fixed to the cover glass 15 via an adhesive layer AT. The adhesive layer AT is, for example, a translucent adhesive called OCA (Optical Clear Adhesive). The adhesive layer AT may be, for example, another transparent adhesive such as OCR (Optical Clear Resin) or an air gap. The adhesive layer AT may be a translucent film with double-sided adhesive properties. The half mirror HM includes a translucent base material 15M and a mirror layer 16. The mirror layer 16 is, for example, a dielectric multilayer film formed by laminating a transparent dielectric film with a high refractive index and a transparent dielectric film with a low refractive index. Furthermore, the mirror layer 16 is not limited to a dielectric multilayer film, and may be a mirror made of a metal with high reflectivity, such as aluminum or molybdenum. The base material 15M is, for example, a glass substrate. The base material 15M may also be a light-transmitting resin.

[0057] In the display system 100A according to the second embodiment, when the display panel 200 displays an image and the emitted light IM passes through the sensor unit 10 and the half mirror HM, the emitted light IM of the displayed image can reach the observer's eye E. If the emitted light IM of the display panel 200 is weaker than the incident light IL that enters the half mirror 30 from the outside, or if there is no emitted light IM of the display panel 200, the incident light IL is reflected by the half mirror HM and is visible to the observer as reflected light RL.

[0058] 12 and 13 are diagrams illustrating the concept of display according to the second embodiment. Fig. 12 shows the case where the backlight of the display panel 200 is turned on. In Fig. 12, if the amount of light from the backlight of the display panel 200 is sufficiently large, the range of the half mirror HM in the range 201 where the parallax barrier unit PB is provided becomes bright, and a stereoscopic image can be viewed. At this time, the amount of light is insufficient in the areas outside the range of the half mirror HM, so the reverse optical image cannot be viewed or is barely visible.

[0059] Fig. 13 shows a case where the backlight of the display panel 200 is not turned on. In Fig. 13, when the backlight of the display panel 200 is not turned on, the area of ​​the half mirror HM acts as a mirror. Therefore, a stereoscopic image cannot be viewed within the area of ​​the half mirror HM. Also, a reversed optical image cannot be viewed within the area of ​​the half mirror HM.

[0060] Furthermore, by using a directional backlight for the display panel 200 or by combining it with collimated light, the difference in brightness between the stereoscopic image and the reversed image becomes more pronounced. This makes the display easier to see in the bright visible area than in the reflection, but makes the display harder to see in the dark reversed image area due to the mirror effect. As a result, the reversed image becomes less noticeable. [Explanation of symbols]

[0061] 1 Display device 10 Sensor section 11 Sensor board 12 electrodes 13 Wiring 14 Shield 15 Coverslip 20 Detector 21 Control board 22 Detection circuit 23 Processing circuit 24 Power circuit 25 Interface Circuit 31 Wiring board 40 Panel 1 42 Signal detection unit 43 A / D conversion section 44 Coordinate calculation unit 48 pixels 49 subpixels 49R 1st subpixel 49G 2nd subpixel 49B 3rd subpixel 50, 51 angle range 100, 100A display system 200 Display Panel AA detection area F. Object to be detected HM Half Mirror PB Parallax barrier section PB1, PB2 light shielding body

Claims

1. a display panel; a display area for displaying an image output by the display panel; a parallax barrier for allowing the image output by the display area to be viewed as a parallax image; and a sensor provided over the parallax barrier; Including, A stereoscopic image can be viewed within a predetermined angle range including the front of the display area, and an image other than the stereoscopic image cannot be viewed outside the predetermined angle range. Display device.

2. The predetermined angle range is a range of 10° to 160° including the front surface of the panel. The display device according to claim 1 .

3. the parallax barrier has a thickness t in a direction from the display panel toward the sensor, the opening width S of the parallax barrier; a distance G between the parallax barrier and the display panel; When the number of pixels used in one opening of the parallax barrier among the pixels constituting the display panel is P, the thickness t of the parallax barrier is t≧(2×S×G) / (PS) 3. The display device according to claim 1, wherein:

4. Further, a half mirror is provided on the sensor, the parallax barrier is provided at a position sandwiched between the display panel and the half mirror, When the display panel outputs an image, the stereoscopic image can be viewed, When the display panel is not outputting an image, the parallax barrier and the sensor are not visible due to the mirror surface of the half mirror. The display device according to claim 1 .

5. the sensor includes a plurality of electrodes; The value of the capacitance generated between the plurality of electrodes and the object to be detected is detected. The display device according to any one of claims 1 to 4.

6. The sensor detects a detection object in an area where a stereoscopic image is viewed, within an angular range of an area where a stereoscopic image is viewed, including a front of the display area. The display device according to any one of claims 1 to 5.

Images