DISPLAY APPARATUS

• US 20200135145A1
• Filed: 10/23/2019
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: DENSO Corporation, Waseda University (Waseda University Educational Association)
• Original Assignee: DENSO Corporation, Waseda University (Waseda University Educational Association)
• Inventors: OGAWA, Hiroaki, WATANABE, Katsumi
• Granted Patent: US 10,978,023 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 2027/0112 comprising device for genereting colour display
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0181 Adaptation to the pilot/driver
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0179 Display position adjusting means not related to the information to be displayed
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 2360/16 Calculation or use of calculated indices related to luminance levels in display data
• CPC Class Codes: G09G 2380/10 Automotive applications
• CPC Class Codes: G09G 5/10 Intensity circuits

Abstract

In a display apparatus, a projected member is arranged in a direction in which a driver of a moving body looks while driving, from the perspective of the driver. A projecting unit projects at least one display object in a position that overlaps a background that is visible to the driver through the projected member, so as to be displayed in a superimposed manner as a virtual image. A measuring unit measures a luminance value of the background. A control unit determines a luminance value of the display object based on the luminance value of the background measured by the measuring unit, chromaticity values of the display object, and a sense of superimposition that is a value having a range of 0 or greater and 100 or less, and controls the projecting unit such that the display object is projected at the luminance value of the display object.

Claims

1. A display apparatus comprising:

a projected member that is arranged in a direction in which a driver of a moving body looks while driving, from the perspective of the driver;

a projecting unit that projects at least one display object in a position that overlaps a background that is visible to the driver through the projected member, so as to be displayed in a superimposed manner as a virtual image;

a measuring unit that measures a luminance value of the background; and

a control unit that determines a luminance value of the display object based on the luminance value of the background measured by the measuring unit, chromaticity values of the display object, and a sense of superimposition that is a value having a range of 0 or greater and 100 or less, and controls the projecting unit such that the display object is projected at the luminance value of the display object.

2. The display apparatus according to claim 1, wherein:

the control unit determines the luminance value of the display object based on the following expressions 1A and 1B;

3. The display apparatus according to claim 1, wherein:

the control unit determines the luminance value of the display object based on the following expressions 2A and 2B;

4. The display apparatus according to claim 2, further comprising:

a setting unit that sets, as a value of the sense of superimposition, a value that is included within a range of 0 or greater and 100 or less, and is determined by an operation by the driver, wherein

the control unit determines the luminance value of the display object based on the sense of superimposition set by the setting unit.

5. The display apparatus according to claim 3, further comprising:

a setting unit that sets as a value of the sense of superimposition, a value that is included within a range of 0 or greater and 100 or less, and is determined by an operation by the driver, wherein

the control unit determines the luminance value of the display object based on the sense of superimposition set by the setting unit.

6. The display apparatus according to claim 2, wherein:

when a plurality of display objects are projected by the projecting unit, the control unit determines the luminance value of the display object for each of the plurality of display objects.

7. The display apparatus according to claim 6, wherein:

when determining the luminance value for each of the plurality of display objects, the control unit acquires the luminance value of the background measured by the measuring unit for each of areas in which the plurality of display objects are displayed.

8. The display apparatus according to claim 3, wherein:

when a plurality of display objects are projected by the projecting unit, the control unit determines the luminance value of the display object for each of the plurality of display objects.

9. The display apparatus according to claim 8, wherein:

when determining the luminance value for each of the plurality of display objects, the control unit acquires the luminance value of the background measured by the measuring unit for each of areas in which the plurality of display objects are displayed.

10. A control method for a display apparatus,

the display apparatus comprising:

a projected member that is arranged in a direction in which a driver of a moving body looks while driving, from the perspective of the driver;

a projecting unit that projects at least one display object in a position that overlaps a background that is visible to the driver through the projected member, so as to be displayed in a superimposed manner as a virtual image; and

a measuring unit that measures a luminance value of the background, the control method comprising;

determining a luminance value of the display object based on the luminance value of the background measured by the measuring unit, chromaticity values of the display object, and a sense of superimposition that is a value having a range of 0 or greater and 100 or less; and

controlling the projecting unit such that the display object is projected at the luminance value of the display object.

11. The control method according to claim 10, wherein:

the control unit determines the luminance value of the display object based on the following expressions 1A and 1B;

12. The control method according to claim 10, wherein:

the control unit determines the luminance value of the display object based on the following expressions 2A and 2B;