JP2012220757A - Projection display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection display device capable of switching projection methods and downsizing.SOLUTION: A projection display device 100 includes: a body part 10: a projection part 20 that is rotatably supported by the body part 10 and projects light containing an image signal; and a light transmission type display screen 30 that is provided for the body part 10 to display an image on a front face 31 side by receiving light projected by the projection part 20 from a rear face 32 side. The projection part 20 projects light toward an external projection object place by the rotation of the projection part 20 under the state where the projection part 20 is directed to the direction other than the light transmission type display screen 30.

Description

  The present invention relates to a projection display device capable of switching a projection method.

  Japanese Patent Laying-Open No. 2005-266601 (Patent Document 1) discloses an invention related to a projection display device. The projection display device includes a projector, a transmissive screen, and a mirror that guides projection light projected from the projector to the transmissive screen. Patent Document 1 states that the projection method can be easily switched by using this mirror.

JP 2005-266601 A

  In the configuration disclosed in Japanese Patent Laying-Open No. 2005-266601 (Patent Document 1), a mirror for switching the projection method is required. The mirror in Patent Document 1 is provided so as to protrude outward from the main body. Such a projection display device is larger in size as it includes a mirror provided so as to protrude.

  It is an object of the present invention to obtain a projection display device that can switch the projection method and can be miniaturized.

  A projection display device according to the present invention is provided on a main body, a projection that is pivotally supported by the main body, projects light including a video signal, and is projected from the projection. A light transmissive display screen that displays an image on the front surface side by receiving the received light from the back surface side, and a control unit, and the projection unit is rotated in a direction other than the light transmissive display screen. In the directed state, the projection unit projects light toward an external projection target location.

  Preferably, the control unit projects the light toward the external projection target location, rather than when the projection unit projects light toward the light-transmissive display screen. In this case, the projection unit is controlled so that the brightness of light projected from the projection unit is higher.

  Preferably, when the projection unit emits light toward the light transmission type display screen, the control unit projects from the projection unit so as to be adapted to the light transmission type display screen. The focal length and irradiation range of light are controlled, and the control unit is adapted to adapt to the external projection target location when the projection unit emits light toward the external projection target location. The focal length and irradiation range of the light projected from the projection unit are controlled.

  Preferably, the control unit includes a case where the projection unit emits light toward the light transmission type display screen and a case where the projection unit emits light toward the external projection target location. The light emitted from the projection unit is controlled so that the light emitted from the projection unit is axisymmetric with respect to the projection unit.

  Preferably, the light transmissive display screen is configured to be movable relative to the main body, and the projection unit is configured to move the light transmissive display screen relative to the main body. Rotate to match.

  Preferably, an operation unit is provided on a surface of the main body, the light transmission display screen includes a touch panel, and the control unit includes the main body so that the light transmission display screen covers the operation unit. In a state where the touch panel is closed with respect to the screen and in a state where the light transmission type display screen is opened with respect to the main body, the coordinates of the touch panel are displayed on the light transmission type display screen and the operation unit. The coordinates of the touch panel are corrected so as to correspond to each.

  Preferably, the touch panel incorporated in the light transmissive display screen is a capacitance type, and the control unit is closed with respect to the main body so that the light transmissive display screen covers the operation unit. And the sensitivity of the capacitive touch panel is corrected in the state where the light transmission type display screen is opened with respect to the main body.

  ADVANTAGE OF THE INVENTION According to this invention, it is a projection display apparatus which can switch a projection system, Comprising: The projection display apparatus which can aim at size reduction can be obtained.

It is a perspective view which shows the 1st state of the projection display apparatus in Embodiment 1. FIG. FIG. 6 is a perspective view showing a second state of the projection display apparatus in the first embodiment. It is a perspective view which shows the 1st use condition of the projection display apparatus in Embodiment 1. FIG. It is a side view which shows the 1st use condition of the projection display apparatus in Embodiment 1. FIG. It is a perspective view which shows the 2nd use condition of the projection display apparatus in Embodiment 1. FIG. It is a side view which shows the 2nd use condition of the projection display apparatus in Embodiment 1. FIG. It is a perspective view which shows the 1st state of the projection display apparatus in Embodiment 2. FIG. It is a perspective view which shows the 2nd state of the projection display apparatus in Embodiment 2. FIG. It is a 1st perspective view which shows the 1st state of the projection display apparatus in Embodiment 3. It is a 2nd perspective view which shows the 1st state of the projection display apparatus in Embodiment 3. FIG. It is a perspective view which shows the 2nd state of the projection display apparatus in Embodiment 3. FIG. It is a side view which shows the 1st state of the projection display apparatus in Embodiment 4. It is a perspective view which shows the 2nd state of the projection display apparatus in Embodiment 4. FIG. It is a side view which shows the 2nd state of the projection display apparatus in Embodiment 4.

  Embodiments based on the present invention will be described below with reference to the drawings. In the description of each embodiment, when referring to the number, amount, or the like, the scope of the present invention is not necessarily limited to the number, amount, or the like unless otherwise specified. In the description of each embodiment, the same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated. Unless there is a restriction | limiting in particular, it is planned from the beginning to use suitably combining the structure shown in each embodiment.

[Embodiment 1]
With reference to FIG. 1 and FIG. 2, the structure of the projection display apparatus 100 in this Embodiment is demonstrated. FIG. 1 is a perspective view showing a first state of the projection display apparatus 100. FIG. 2 is a perspective view showing a second state of the projection display apparatus 100.

  As shown in FIGS. 1 and 2, the projection display device 100 includes a main body unit 10, a projection unit 20, and a light transmission display screen 30. Projection display apparatus 100 in the present embodiment constitutes an electronic device such as a mobile phone.

(Main body 10)
The main body 10 is configured in a substantially rectangular parallelepiped shape. A control unit 40 is provided inside the main body unit 10. In FIG. 1, for convenience in illustration, the control unit 40 is shown in a block shape using broken lines. This conceptually shows that the control unit 40 is provided inside the main body unit 10. The actual shape and position of the control unit 40 are not necessarily as shown by the broken lines in FIG.

  An operation unit 12 is provided on the surface of the main body unit 10. For example, a mechanical push button switch (hard key) or, for example, a capacitive touch switch (soft key) displayed on a liquid crystal by software is arranged on the operation unit 12 (not shown). Both of these switches may be arranged on the operation unit 12.

  Signals received from the user of the projection display device 100 through these switches are input to the control unit 40. The control unit 40 controls the projection display device 100 according to the input signal. One end of the main body 10 is provided with a pair of attachment portions 14 (see FIG. 2) so as to bulge outward.

(Projector 20)
The projection unit 20 is configured in a substantially cylindrical shape. The projection unit 20 includes an emission unit 22 and is disposed between the pair of attachment units 14. The output portion 22 is pivotally supported by the pair of attachment portions 14 so as to be rotatable with respect to the main body portion 10 in the direction of the arrow AR20.

  The projection unit 20 includes an optical element such as an LED (Light Emitting Diode) that projects light including a video signal. As an optical element built in the projection unit 20, for example, a laser emitting blue laser (oscillation wavelength is 430 to 470 nm), a laser emitting green laser (oscillation wavelength is 550 to 510 nm), and a red laser are used. It includes what is emitted (oscillation wavelength is 620 to 660 nm).

  The light (laser light) emitted from these optical elements is a collimator lens that converts these light into parallel light, a half mirror that aligns the parallel light on the same axis, and the path of the parallel light that is aligned on the same axis. Is quickly taken out from the emitting portion 22 through a two-axis MEMS mirror or the like that realizes two-dimensional scanning.

(Light transmissive display screen 30)
The light transmissive display screen 30 is configured in a flat plate shape having a front surface 31 and a back surface 32. The light transmissive display screen 30 may be configured of a member having a predetermined light directivity (polarization characteristic) with respect to the light 24 (see FIG. 3) received from the emitting unit 22 of the projection unit 20.

  At one end of the light transmission type display screen 30, a pair of attachment portions 34 formed in a substantially columnar shape are provided with a space therebetween. The pair of attachment portions 34 are disposed on both outer sides of the pair of attachment portions 14 in the main body portion 10. By the pair of attachment portions 34 and the pair of attachment portions 14, the light transmissive display screen 30 is pivotally supported with respect to the projection portion 20 so as to be rotatable in the direction of the arrow AR 30 (so-called hinge shape). The light transmissive display screen 30 is configured to be movable relative to the main body 10.

(First use state)
FIG. 3 is a perspective view showing a first usage state of the projection display apparatus 100. FIG. 4 is a side view showing a first use state of the projection display apparatus 100. As shown in FIGS. 3 and 4, in the first use state, the projection display device 100 functions as a so-called mobile phone. The light transmissive display screen 30 is open to the main body 10. In this state, light 24 including a video signal is projected from the emitting portion 22 toward the back surface 32 side of the light transmission display screen 30. The light transmission type display screen 30 receives the light 24 from the back surface 32 side.

  As described above, the light 24 projected from the emitting unit 22 includes light having three wavelengths that are respectively aligned in the coaxial direction, for example. A predetermined image (a still image or a moving image) is projected on the back surface 32 by the light emission unit 22 scanning light 24 including three wavelengths toward the back surface 32 of the light transmission type display screen 30.

  The light 24 passes through the light-transmissive display screen 30 from the back surface 32 side toward the front surface 31 side. A predetermined image (a still image or a moving image) is displayed on the surface 31 of the light transmissive display screen 30 by the light 24 transmitted through the light transmissive display screen 30. This image can be viewed by a user of the projection display device 100 or the like. The image projected on the surface 31 of the light transmissive display screen 30 and the capacitive touch switch (touch panel) built in the light transmissive display screen 30 may be configured to cooperate with each other.

(Second usage state)
FIG. 5 is a perspective view showing a second usage state of the projection display apparatus 100. FIG. 6 is a side view showing a second usage state of the projection display apparatus 100. As shown in FIGS. 5 and 6, in the second use state, the projection display device 100 functions as a so-called projector. The light transmissive display screen 30 is closed (folded) with respect to the main body 10. The projection unit 20 (the emitting unit 22) is rotated so as to face outward from the main body unit 10. As the projection unit 20 rotates, the projection display device 100 transitions from the first usage state to the second usage state.

  In the second usage state of the projection display device 100, the light 24 including the video signal is projected from the emission unit 22 toward the screen 50 (external projection target location) fixed to the wall surface 52. A predetermined image (a still image or a moving image) is displayed on the screen 50. This image can be viewed by a user of the projection display device 100, an observer around the projection display device 100, and the like.

  When the projection unit 20 emits the light 24 toward the light transmission type display screen 30 and when the projection unit 20 emits the light 24 toward the screen 50, the projection unit 20 emits the light 24. The light emitted from the projection unit 20 may be controlled by the control unit 40 so that the light 24 is symmetrical with respect to the projection unit 20 (left-right reversal or vertical (top-and-bottom) reversal).

  In the second use state, the image displayed on the operation unit 12 of the projection display device 100 and the image displayed on the screen 50 by the projection of the light 24 may be the same or different. Good. When the images displayed on the operation unit 12 and the screen 50 are different, the still image displayed on the screen 50 is switched by a mechanical or capacitive switch disposed on the operation unit 12. The video image may be played or stopped.

  When the projection display device 100 is switched from the first usage state to the second usage state, the control unit 40 may control the projection unit 20 so that the luminance of light projected from the projection unit 20 becomes higher. . By this control, when the projection unit 20 projects light toward the screen 50 rather than when the projection unit 20 projects light toward the light transmissive display screen 30 (first use state). The brightness of the light projected from the projection unit 20 is higher in the (second use state). The brightness of light projected from the projection unit 20 in the first use state is suppressed, and the brightness of light projected from the projection unit 20 in the second use state is increased. According to this configuration, energy consumption can be reduced.

  When the projection unit 20 emits the light 24 toward the light transmissive display screen 30, the control unit 40 projects the light 24 projected from the projection unit 20 so as to fit the light transmissive display screen 30. It is preferable to control the focal length (focus function) and the irradiation range (zoom function). Specifically, in this case, the control unit 40 controls the projection unit 20 so that the focal length of the light 24 is shortened and the irradiation range of the light 24 is narrowed.

  When the projection unit 20 emits the light 24 toward the light transmission type display screen 30, the control unit 40 projects the projection from the emission unit 22 of the projection unit 20 so that the user can easily see the image. A predetermined trapezoidal correction may be performed on the light 24 to be performed. This trapezoidal correction can be performed by a biaxial MEMS mirror built in the projection unit 20.

  Similar to the case where the projection unit 20 emits the light 24 toward the light-transmissive display screen 30, the control unit 40, when the projection unit 20 emits the light 24 toward the screen 50, The focal length and irradiation range of the light 24 projected from the projection unit 20 may be controlled so as to match the screen 50. Specifically, in this case, the control unit 40 controls the projection unit 20 so that the focal length of the light 24 becomes longer and the irradiation range of the light 24 becomes wider.

(Action / Effect)
The projection display device 100 according to the present embodiment switches between the projection onto the light transmission type display screen 30 and the projection onto the screen 50 by the rotation of the projection unit 20.

  Unlike the configuration of Japanese Patent Application Laid-Open No. 2005-266601 (Patent Document 1) described at the beginning, the projection display device 100 does not include a mirror for changing the projection method. Although the mirror in Patent Document 1 is provided so as to protrude outward from the main body, the projection display device 100 in the present embodiment can be miniaturized because it does not include such a mirror. .

[Embodiment 2]
With reference to FIG. 7 and FIG. 8, the projection display apparatus 101 in this Embodiment is demonstrated. FIG. 7 is a perspective view showing a first state of the projection display apparatus 101. FIG. 8 is a perspective view showing a second state of the projection display apparatus 101.

  As shown in FIG. 7, also in the projection display apparatus 101, the light transmission type display screen 30 is configured to be movable relative to the main body unit 10. A pair of gears 16 is provided on both outer sides of the attachment portion 14 of the main body portion 10. A pair of gears 36 is provided at one end of the light transmission type display screen 30. The gear 16 and the gear 36 are disposed so as to mesh with each other.

  In the projection display device 101, when the light transmissive display screen 30 is rotated in the direction of the arrow AR 30 by a user or the like (when the light transmissive display screen 30 is folded with respect to the main body unit 10), the gears. The projection unit 20 is rotated in the direction of the arrow AR20 (so that the emission unit 22 of the projection unit 20 is located in front of the main body unit 10) by the gear mechanism configured by 16 and 36.

  As shown in FIG. 8, the emission unit 22 of the projection unit 20 rotates in accordance with the rotation (relative movement) of the main body unit 10 with respect to the light transmission type display screen 30. The rotation angle of the projection unit 20 is defined in advance by the gears 16 and 36. In a state where the light transmission type display screen 30 is closed with respect to the main body unit 10, the emission unit 22 of the projection unit 20 is set (positioned) so as to be positioned, for example, in front of the main body unit 10. In this case, since it is not necessary for the user to set the rotation angle of the emission part 22 of the projection part 20, the convenience is high.

  In a state where the light transmission type display screen 30 is closed with respect to the main body unit 10 (the state shown in FIG. 8), the content displayed on the operation unit 12 of the main body unit 10 is transmitted to the user through the light transmission type display screen 30. May be configured to be visible. The light transmissive display screen 30 may include a capacitive touch switch (soft key) or the like, and various switches on the operation unit 12 may be operated through the back surface 32 of the light transmissive display screen 30. .

  When a capacitive touch switch (touch panel) is built in the light transmissive display screen 30, the capacitive touch switch is operated from both the front surface 31 and the back surface 32 due to its functional characteristics. Can do.

  When a capacitive touch switch (touch panel) is built in the light transmission type display screen 30, the first use state (state shown in FIG. 7) and the second use state (state shown in FIG. 8) The coordinates on the touch switch are opposite between the projection unit 20 side and the opposite side in the longitudinal direction of the operation unit 12. In this case, it is preferable that the control unit 40 corrects that the coordinates on the touch switch are opposite on the projection unit 20 side and the opposite side in the longitudinal direction of the operation unit 12.

  When the capacitive touch switch (touch panel) is built in the light transmission type display screen 30, when the projection display device 100 is switched from the first use state to the second use state, the control unit 40 The sensitivity of the capacitive touch switch (touch panel) may be corrected. In this case, the control unit 40 is in a state in which the light transmission type display screen 30 is closed with respect to the main body unit 10 so as to cover the operation unit 12 and a state in which the light transmission type display screen 30 is open with respect to the main body unit 10. The sensitivity of the capacitive touch switch (touch panel) is corrected. The capacitive touch switch (touch panel) may not be disposed at the exact center in the thickness direction of the light-transmissive display screen 30 (the center of the front surface 31 and the back surface 32). According to this configuration, the capacitance type touch switch (touch panel) can be operated from the front surface 31 side or the back surface 32 side. It is possible to operate (respond) appropriately by correcting the above.

[Embodiment 3]
With reference to FIGS. 9 to 11, the projection display apparatus 102 in the present embodiment will be described. FIG. 9 is a first perspective view showing a first state of the projection display apparatus 102. FIG. 10 is a second perspective view showing the first state of the projection display apparatus 102. FIG. 11 is a perspective view showing a second state of the projection display apparatus 102.

  As shown in FIG. 9, the projection display device 102 is configured such that the light-transmissive display screen 30 is in sliding contact with the main body 10 in the direction of the arrow AR30.

  As shown in FIG. 10, gear grooves 38 extending along the longitudinal direction are provided on both sides of the back surface 32 of the light-transmissive display screen 30. The gear grooves 38 are fitted to the gears 18 provided on both outer sides of the attachment portion 14 of the main body portion 10. The gears 18 are fitted with gears 26 provided on both outer sides of the attachment portion 14 of the main body 10.

  In the projection display device 102, a gear mechanism including a gear groove 38, a gear 18, and a gear 26 in accordance with the relative movement of the light-transmissive display screen 30 in the direction of the arrow AR 30 with respect to the main body 10. As a result, the emission part 22 of the projection part 20 rotates in the direction of the arrow AR20 (see FIG. 10). The rotation angle of the projection unit 20 is defined in advance by the gear groove 38, the gear 18, and the gear 26.

  In a state where the light transmission type display screen 30 is closed with respect to the main body unit 10 (see FIG. 11), the emission unit 22 of the projection unit 20 is set (positioned) so as to be positioned, for example, in front of the main body unit 10. . In this case, since it is not necessary for the user to set the rotation angle of the emission part 22 of the projection part 20, the convenience is high.

  In the first use state of the projection display device 102 (the state shown in FIGS. 9 and 10), the light transmissive display screen 30 is open with respect to the main body unit 10. In this state, light 24 including a video signal is projected from the emitting portion 22 toward the back surface 32 side of the light transmission display screen 30. The light transmission type display screen 30 receives the light 24 from the back surface 32 side.

  Similar to the projection display device 100 (see FIGS. 3 and 4) in the first embodiment described above, the light 24 is transmitted through the light transmissive display screen 30 from the back surface 32 side toward the front surface 31 side. A predetermined image (a still image or a moving image) is displayed on the surface 31 of the light transmissive display screen 30 by the light 24 transmitted through the light transmissive display screen 30. This video can be viewed by a user of the projection display device 102 or the like.

  As shown in FIG. 11, in the second usage state of the projection display device 102, the light transmission type display screen 30 is closed with respect to the operation unit 12 of the main body unit 10 (the main body unit 10 and the light transmission type display). The screens 30 are overlapped). The projection unit 20 (the emitting unit 22) is rotated so as to face outward from the main body unit 10. As the projection unit 20 rotates, the projection display device 100 transitions from the first usage state to the second usage state.

  In the second usage state of the projection display device 102, the image is emitted from the emission unit 22 toward the external projection target location, similarly to the projection display device 100 (see FIGS. 5 and 6) in the first embodiment described above. Light 24 containing the signal is projected. A predetermined image (a still image or a moving image) is projected on an external projection target location. This image can be viewed by a user of the projection display device 102, an observer around the projection display device 102, and the like.

  The projection display device 102 according to the present embodiment also switches between projection onto the light transmission type display screen 30 and projection onto an external projection target location by rotating the projection unit 20. Unlike the configuration of Japanese Patent Laid-Open No. 2005-266601 (Patent Document 1) described at the beginning, the projection display device 102 does not include a mirror for changing the projection method. Although the mirror in Patent Document 1 is provided so as to protrude outward from the main body, the projection display device 102 in the present embodiment can be reduced in size because it does not include such a mirror. .

[Embodiment 4]
With reference to FIGS. 12 to 14, the projection display apparatus 103 in the present embodiment will be described. FIG. 12 is a side view showing a first state of the projection display apparatus 103. FIG. 13 is a perspective view showing a second state of the projection display apparatus 103. FIG. 14 is a side view showing a second state of the projection display apparatus 103.

  In the projection display devices 100 to 102 in the above-described embodiments, the light transmission type display screen 30 is configured to be movable relative to the main body unit 10.

  As shown in FIG. 12, in the projection display apparatus 103 according to the present embodiment, the light transmissive display screen 30 is not configured to be movable relative to the main body 10. The projection part 20 is arrange | positioned between a pair of attachment parts 14 (refer FIG. 13). The output portion 22 is pivotally supported by the pair of attachment portions 14 so as to be rotatable with respect to the main body portion 10 in the direction of the arrow AR20.

  In the first use state, the projection display device 103 functions as a so-called mobile phone. In this state, light 24 including a video signal is projected from the emitting portion 22 toward the back surface 32 side of the light transmission display screen 30. The light transmission type display screen 30 receives the light 24 from the back surface 32 side. A predetermined image (still image or moving image) is projected on the back surface 32.

  The light 24 passes through the light-transmissive display screen 30 from the back surface 32 side toward the front surface 31 side. A predetermined image (a still image or a moving image) is displayed on the surface 31 of the light transmissive display screen 30 by the light 24 transmitted through the light transmissive display screen 30. This image can be viewed by a user of the projection display device 100 or the like. The image projected on the surface 31 of the light transmissive display screen 30 and the capacitive touch switch (touch panel) built in the light transmissive display screen 30 may be configured to cooperate with each other.

  As shown in FIGS. 13 and 14, the projection display device 103 functions as a so-called projector in the second use state. The projection unit 20 (the emitting unit 22) is rotated so as to face outward from the main body unit 10. As the projection unit 20 rotates, the projection display device 103 changes from the first use state to the second use state.

  In the second use state of the projection display device 103, the video signal is included from the emitting unit 22 toward the screen 50 (external projection target location) (see FIG. 14) fixed to the wall surface 52 (see FIG. 14). Light 24 is projected. A predetermined image (a still image or a moving image) is displayed on the screen 50. This image can be viewed by a user of the projection display device 103, an observer around the projection display device 103, and the like.

  The projection display device 103 according to the present embodiment also switches between projection onto the light transmission type display screen 30 and projection onto the screen 50 by the rotation of the projection unit 20. Unlike the configuration of Japanese Patent Laid-Open No. 2005-266601 (Patent Document 1) described at the beginning, the projection display device 103 does not include a mirror for changing the projection method. The mirror in Patent Document 1 is provided so as to protrude outward from the main body, but the projection display device 103 in this embodiment can be downsized because it does not include such a mirror. .

  As mentioned above, although each embodiment based on this invention was described, each embodiment disclosed this time is an illustration and restrictive at no points. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 10 Main body part, 12 Operation part, 14,34 Mounting part, 16, 18, 26, 36 Gear, 20 Projection part, 22 Output part, 24 light, 30 Light transmission type display screen, 31 Surface, 32 Back surface, 38 Gear groove , 40 control unit, 50 light transmission type display screen (external projection target location), 52 wall surface, 100, 101, 102, 103 projection display device, AR20, AR30 arrow.

Claims (7)

The main body,
A projection unit that is pivotally supported by the main body unit and projects light including a video signal;
A light transmissive display screen that is provided in the main body and displays an image on the front side by receiving light projected from the projection unit from the back side;
A control unit;
With
In a state in which the projection unit is turned and directed in a direction other than the light-transmissive display screen, the projection unit projects light toward an external projection target location.
Projection display device. In the case where the projection unit is projecting light toward the external projection target location, compared to the case where the projection unit projects light toward the light-transmissive display screen. However, the projection unit is controlled so that the brightness of the light projected from the projection unit is increased.
The projection display device according to claim 1. When the projection unit emits light toward the light transmission type display screen, the control unit focuses the light projected from the projection unit so as to be adapted to the light transmission type display screen. Control the distance and irradiation range,
When the projection unit emits light toward the external projection target location, the control unit focuses the light projected from the projection unit so as to be adapted to the external projection target location. Control distance and irradiation range,
The projection display device according to claim 1 or 2. In the case where the projection unit emits light toward the light-transmissive display screen and the case where the projection unit emits light toward the external projection target location, the control unit, Controlling the light emitted from the projection unit so that the light emitted from the projection unit is axisymmetric with respect to the projection unit;
The projection display device according to claim 1. The light transmissive display screen is configured to be movable relative to the main body,
The projection unit rotates in accordance with the light transmission type display screen moving relative to the main body unit.
The projection display device according to claim 1. An operation unit is provided on the surface of the main body,
The light transmission type display screen has a built-in touch panel,
In the state where the light transmissive display screen is closed with respect to the main body so as to cover the operation unit, and the state where the light transmissive display screen is open with respect to the main body, Correcting the coordinates of the touch panel so that the coordinates of the touch panel correspond to the video displayed on the light transmission type display screen and the operation unit, respectively.
The projection display device according to claim 1. The touch panel built in the light transmissive display screen is a capacitive type,
The control unit is static when the light transmissive display screen is closed with respect to the main body so as to cover the operation unit and when the light transmissive display screen is open with respect to the main body. Correct the sensitivity of the capacitive touch panel,
The projection display device according to claim 6.

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