Display device for construction machine

• US 20020015018A1
• Filed: 07/26/2001
• Published: 02/07/2002
• Est. Priority Date: 07/31/2000
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Iwamoto, Yuuichi, Kooriyama, Kenji, Shimazu, Mitsuhiro, Ueda, Masamichi
• Granted Patent: US 7,161,605 B2
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: E02F 9/26 Indicating devices E02F5/145 takes precedence
• CPC Class Codes: G09G 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 3/04 for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions

Abstract

To prevent a display screen from being reflected on glass shields, without lowering the visibility of a display portion.

The brightness of the display color of either the background portion 31 on a display screen 30 or the background portion 31 of such one of display portions 32 and 33 as occupies the larger area of the lit portion of the display screen 30 is changed according to the control of a control switch 23. If the brightness of the display color of the background portion 31 is lowered (from the “thin light blue” to the “thick light blue”, for example) at the nighttime, therefore, its reflection on the less around a cabin 40 can be reduced without lowering the luminance of the display screen 30. Alternatively, the saturation or hue of the display color is likewise changed.

Claims

1. A display device disposed in a cabin of a construction machine comprising:

a background portion and a display portion on a display screen,

wherein the improvement comprises;

change means for changing the difference in brightness, saturation or hue between the individual display colors of said background portion and said display portion.

3. A display device for a construction machine according to claim 1,

wherein said change means changes the brightness, saturation or hue of the display color of said background portion.

4. A display device for a construction machine according to claim 1, further comprising:

an illumination switch for turning ON/OFF an illumination,

wherein in response to the ON/OFF of said illumination switch, the brightness, saturation or hue of either the display colors of said background portion or said display portion, or the display color of said background portion and said display portion is changed.

2. A display device for a construction machine according to claim 11

wherein said change means changes the brightness, saturation or hue of such one of the display colors of said background portion or said display portion which occupies the larger area on said display screen.

5. A display device disposed in a cabin of a construction machine and comprising:

a background portion and a display portion on a display screen,

wherein the improvement comprises;

illuminance detecting means for detecting the illuminance of the inside or the outside of the cabin; and

change means for changing the difference in brightness, saturation or hue between the individual display colors of said background portion and said display portion, depending on the case where the illuminance detected by said illuminance detecting means is higher or lower than a predetermined threshold value.