JP5163433B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicle display device.

2. Description of the Related Art Conventionally, there is known a vehicle display device that changes display luminance of a display device according to external light illuminance detected in a vehicle (for example, see Patent Document 1). According to such a conventional vehicle display device, display brightness suitable for the illuminance of outside light is realized by the display, so that the visibility of display by the display is improved.
JP 2001-206103 A

  Now, from the viewpoint of safety and the like, in general, a vehicle light is turned on when the illuminance of outside light decreases, and is turned off when the illuminance of outside light increases. Here, in the conventional vehicle display device described above, the display brightness of the entire display device changes according to the external light illuminance, so that the visibility of the display is improved. Until the illuminance needs to be changed, it cannot be transmitted to the vehicle occupant. For this reason, there is a problem that the vehicle occupant easily forgets to change the state of the vehicle in spite of the situation where the state of the light needs to be changed.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a display device for a vehicle that suppresses forgetting of a state change of a light by a vehicle occupant.

According to the first aspect of the present invention, in the vehicle, the display means for displaying the second zone in the periphery of the first zone, the detection means for detecting the external light illuminance of the vehicle, and the external light illuminance detected by the detection means And variable means for changing the contrast ratio of the first zone and the second zone in the display means when the illuminance condition for switching the light state is satisfied, and the display means instructs the state value of the vehicle by the rotation pointer. Therefore, one of the first zone and the second zone that are adjacent to each other is displayed on the inner circumference side of the index row displayed side by side on the circumference .

According to the invention described in claim 1, when the illuminance condition for switching the state of the vehicle light with respect to the illuminance of the external light detected by the detecting means is established, the second zone is provided around the first zone in the vehicle. In the display means for displaying, the contrast ratio of these zones changes. According to such a change in the contrast ratio, the fact that the illuminance of outside light has become the illuminance required to change the state of the light is alerted to the vehicle occupant, and the situation where the state change is forgotten by the occupant is suppressed. Can do it.
In the first aspect of the invention, when the illuminance condition for switching the light state with respect to the external light illuminance is satisfied, the contrast ratio changes for the first zone and the second zone displayed adjacent to each other. Changes are easily recognized by the passenger. Therefore, it is possible to clearly communicate to the passenger that the illuminance of outside light has become the required illuminance for switching the state of the light, and the effect of suppressing forgetting about the state switching can be enhanced.
Furthermore, in the first aspect of the present invention, when the illuminance condition for switching the light state with respect to the external light illuminance is satisfied, the contrast ratio changes for the first zone and the second zone that are displayed surrounding the other. The change is easily recognized by the occupant. Therefore, it is possible to clearly communicate to the passenger that the illuminance of outside light has become the required illuminance for switching the state of the light, and the effect of suppressing forgetting about the state switching can be enhanced.
Furthermore, in the invention described in claim 1, in order to instruct the state value of the vehicle with the rotation pointer, the first zone and the inner side of the indicator string displayed side by side on the circumference are effectively used. The second zone is displayed. According to such a display, the contrast ratio of the first zone and the second zone changes on the inner circumference side of the index row that is generally secured with high visibility, so that the external light illuminance becomes the illuminance necessary for switching the light state. It is possible to increase the transmission accuracy of the event and thus the effect of suppressing forgetting about the state switching.

  The “contrast ratio” is defined as a ratio that increases as the difference in brightness of the other of the first zone and the second zone increases, and decreases as the brightness difference decreases.

  According to the second, sixth, and twelfth aspects of the present invention, the variable means sets the illuminance condition as a condition that the illuminance of outside light detected by the detecting means becomes less than the set illuminance. In these inventions, when the external light illuminance is less than the set illuminance, the contrast ratio of the first zone and the second zone changes. According to such a change in the contrast ratio, it is possible to alert the passenger that the external light illuminance has become the required illuminance for lighting the light, and to suppress the situation where the lighting is forgotten by the passenger.

  According to the invention described in claims 3, 9, and 14, the variable means sets the illuminance condition as a condition where the external light illuminance detected by the detection means is equal to or higher than the set illuminance. In these inventions, the contrast ratio of the first zone and the second zone changes when the external light illuminance is greater than or equal to the set illuminance. According to such a change in the contrast ratio, it is possible to alert the passenger that the illuminance of the outside light has become the required illuminance for turning off the light, and to suppress the situation where the turn-off is forgotten by the occupant.

  According to the invention described in claim 4, the variable means changes the contrast ratio of the first zone and the second zone by changing the display luminance of at least one of the first zone and the second zone in the display means. In the present invention, when the illuminance condition for switching the light state with respect to the external light illuminance is satisfied, the display luminance of at least one of the first zone and the second zone is changed, so that the contrast ratio of those zones is reliably changed. obtain. Therefore, it is possible to accurately transmit to the occupant that the illuminance of outside light has become the required illuminance for switching the state of the light, and to enhance the effect of suppressing forgetting about the state switching.

  According to the invention described in claim 5, the variable means maintains the display brightness of the first zone and changes the display brightness of the second zone in the display means, thereby changing the contrast ratio of the first zone and the second zone. Change. In this invention, when the illuminance condition for switching the state of the light with respect to the external light illuminance is satisfied, the display brightness of the second zone is changed in the peripheral portion of the first zone where the display brightness is maintained. The change in the contrast ratio is easily recognized by the passenger. Therefore, it is possible to clearly communicate to the passenger that the illuminance of outside light has become the required illuminance for switching the state of the light, and the effect of suppressing forgetting about the state switching can be enhanced.

  The invention according to claim 6 is provided with a confirmation means for confirming the state of the light, and the variable means having the illuminance condition as a condition that the external light illuminance is less than the set illuminance is the light-off state confirmed by the confirmation means. When the illuminance condition is satisfied, the display means maintains the display brightness of the first zone and lowers the display brightness of the second zone. In this invention, when the illuminance condition that the external light illuminance is less than the set illuminance is satisfied in the light-off state confirmed by the confirmation means, the display luminance of the first zone is maintained and the display luminance of the second zone is decreased. The contrast ratio of the zone can be changed. According to such a change in the contrast ratio, the display brightness of the second zone decreases in accordance with the illuminance of outside light. It is possible to increase the effect of suppressing forgetting.

  According to the seventh aspect of the invention, the variable means maintains the display brightness of the first zone in the display means and the first zone when the illuminance condition is satisfied in the light extinction state confirmed by the confirmation means. The display brightness of the second zone is lowered in a range higher than the display brightness. In this invention, when the illuminance condition that the external light illuminance is less than the set illuminance is satisfied in the light-off state confirmed by the confirmation means, the display luminance of the first zone is maintained and the display luminance of the first zone is higher. By reducing the display brightness of the second zone, the contrast ratio of these zones can be changed to the lower side. According to this, the contrast ratio of both zones as well as the display brightness of the second zone are reduced in accordance with the illuminance of outside light, so that the fact that the illuminance of outside light has been reduced to the required illuminance for lighting the light is more sensibly communicated to the passenger. Thus, the effect of suppressing forgetting about the lighting can be further enhanced.

  According to the eighth aspect of the present invention, the variable means is configured to display the first in the display means when the confirmation means confirms that the light is switched from the off state to the lit state after reducing the display brightness of the second zone. The display brightness of the zone is maintained and the display brightness of the second zone is increased. In this invention, when the confirmation means confirms that the light is switched from the off state to the on state after the display brightness of the second zone is reduced, the display brightness of the first zone and the display brightness of the second zone are maintained. As a result of the increase, it becomes possible to restore the contrast ratio of these zones and ensure the visibility of the display.

  The invention according to claim 9 is provided with a confirmation means for confirming the state of the light, and the variable means having the illuminance condition as a condition where the external light illuminance is equal to or higher than the set illuminance is the light state confirmed by the confirmation means. When the illuminance condition is satisfied, the display means maintains the display brightness of the first zone and increases the display brightness of the second zone. In this invention, when the illuminance condition that the external light illuminance is equal to or higher than the set illuminance in the lighting state of the light confirmed by the confirmation means is satisfied, the display luminance of the first zone is maintained and the display luminance of the second zone is increased. The contrast ratio of the zone can be changed. According to such a change in the contrast ratio, the display brightness of the second zone increases in accordance with the illuminance of outside light, so that the occupant senses that the outside light illuminance has increased to the required illuminance for turning off the lights, and the lights are turned off. It is possible to increase the effect of suppressing forgetting.

  According to the invention described in claim 10, when the illumination condition is established in the lighting state of the light confirmed by the confirmation means, the variable means holds the display brightness of the first zone in the display means and The display brightness of the second zone is increased in a range higher than the display brightness. In this invention, when the illuminance condition that the external light illuminance is equal to or higher than the set illuminance in the lighting state of the light confirmed by the confirming means is satisfied, the display brightness of the first zone is maintained and the display brightness of the first zone is higher. By increasing the display brightness of the second zone, the contrast ratio of these zones can be changed to the higher side. According to this, the contrast ratio of both zones, together with the display brightness of the second zone, increases in accordance with the illuminance of outside light, so that it is more sensibly transmitted to the passenger that the illuminance of outside light has increased to the illuminance required to turn off the light. Thus, the effect of suppressing forgetting about the extinction can be further enhanced.

  According to the eleventh aspect of the present invention, the variable means is configured such that when the switching from the lighting state of the light to the extinguishing state is confirmed by the confirmation means after increasing the display brightness of the second zone, The display brightness of the zone is maintained and the display brightness of the second zone is lowered. In the present invention, when the confirmation means confirms that the light is switched from the on state to the off state after the display brightness of the second zone is increased, the display brightness of the first zone and the display brightness of the second zone are maintained. Due to the reduction, it is possible to restore the contrast ratio of these zones and ensure the visibility of the display.

  The invention according to claim 12 is provided with a confirmation means for confirming the state of the light, and the variable means having the illuminance condition as a condition that the external light illuminance is less than the set illuminance is in the light extinction state confirmed by the confirmation means. When the illuminance condition is established, the display means maintains the display brightness of the first zone and raises the display brightness of the second zone in a range lower than the display brightness of the first zone. In this invention, when the illuminance condition that the external light illuminance is less than the set illuminance is satisfied in the light-off state confirmed by the confirmation means, the display luminance of the first zone is maintained and the range is lower than the display luminance of the first zone. By increasing the display brightness of the second zone, the contrast ratio of these zones can be changed to the low side. According to such a change in the contrast ratio, the display luminance of the second zone increases so as to approach the high display luminance of the first zone that matches the illuminance of the external light before the change, thereby causing a reduction in display visibility. It will be. Therefore, the decrease in the safety of the host vehicle due to the decrease in the illuminance of the outside light to the illuminance required for lighting the light is sensibly transmitted to the occupant due to the decrease in display visibility, and the forgetting effect of the lighting is suppressed. Can be increased.

  According to the thirteenth aspect of the present invention, the variable means causes the second means in the display means when the confirmation means confirms that the light is switched from the off state to the lit state after increasing the display brightness of the second zone. The display brightness of the zone is maintained and the display brightness of the first zone is inverted to the low side. In this invention, when it is confirmed that the light is switched from the off state to the on state after the display brightness of the second zone is increased, the display brightness of the second zone is maintained and the display brightness of the first zone is reversed to the lower side. Thus, the display brightness and contrast ratio of these zones can be optimized for external light illuminance less than the set illuminance. According to such an optimizing action, even if the visibility of the display once decreases as the illuminance of the external light becomes the necessary illuminance for lighting the light, the visibility of the display is restored after the lighting is realized. It becomes possible.

  The invention according to claim 14 is provided with a confirmation means for confirming the state of the light, and the variable means having the illuminance condition as a condition that the external light illuminance is equal to or higher than the set illuminance is the light illumination state confirmed by the confirmation means. When the illuminance condition is satisfied, the display brightness of the first zone is maintained in the display unit, and the display brightness of the second zone is lowered in a range higher than the display brightness of the first zone. In this invention, when the illuminance condition that the external light illuminance is equal to or higher than the set illuminance in the lighting state of the light confirmed by the confirming means is satisfied, the display brightness of the first zone is maintained and the display brightness of the first zone is higher. By reducing the display brightness of the second zone, the contrast ratio of these zones can be changed to the lower side. According to such a change in the contrast ratio, the display brightness of the second zone decreases so as to approach the low display brightness of the first zone that matches the illuminance of the external light before the change, resulting in a decrease in display visibility. It will be. Therefore, the reduction in the safety of other vehicles due to the increase in the external light illuminance to the required illuminance for turning off the lights is sensibly transmitted to the passengers due to the reduction in display visibility, and the effect of suppressing forgetting about the turn-off Can be increased.

  According to the fifteenth aspect of the present invention, the variable means is configured such that when the switching from the lighting state to the extinguishing state of the light is confirmed by the confirmation means after the display brightness of the second zone is lowered, The display brightness of the zone is maintained and the display brightness of the first zone is reversed to the high side. In the present invention, when it is confirmed that the light is switched from the on state to the off state after the display brightness of the second zone is lowered, the display brightness of the second zone is maintained and the display brightness of the first zone is reversed to the high side. Thus, the display brightness and contrast ratio of these zones can be optimized with respect to the external light illuminance that is equal to or greater than the set illuminance. According to such an optimizing action, even if the visibility of the display once decreases as the illuminance of the outside light becomes the necessary illuminance for turning off the light, the visibility of the display is restored after the turning off is realized. It becomes possible.

  According to the invention described in claim 16, the display means has an image display section for displaying an image of the first zone and the second zone with a plurality of pixels, and the variable means is a display luminance change target zone in the image display section. The gradation value of each pixel displaying an image is variably controlled. In the present invention, in the image display unit that displays an image of the first zone and the second zone with a plurality of pixels, the gradation value of each pixel that displays an image of the display brightness change target zone is variably controlled to thereby change the change target. The display brightness of the zone can be accurately changed. Therefore, it is possible to increase the accuracy of transmission when the illuminance of outside light has become the necessary illuminance for switching the state of the light, and thus, the effect of suppressing forgetting about the switching of the state.

  According to the invention described in claim 17, when the illuminance condition for switching the state of the vehicle light with respect to the external light illuminance detected by the detecting means is satisfied, the variable means is the area of the first zone and the second zone in the display means. The ratio is changed together with the contrast ratio of the first zone and the second zone in the display means. In the present invention, when the illuminance condition for switching the light state with respect to the external light illuminance is satisfied, not only the contrast ratio of the first zone and the second zone but also the area ratio of these zones changes. According to such a combined change, it is possible to increase the transmission accuracy that the illuminance of outside light has become the required illuminance for switching the state of the light, and thus the effect of suppressing forgetting about the state switching.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In addition, the overlapping description is abbreviate | omitted by attaching | subjecting the same code | symbol to the corresponding component in each embodiment.

(First embodiment)
1 and 2 show a vehicle display device 1 according to a first embodiment of the present invention.

(Basic configuration)
First, the basic configuration of the vehicle display device 1 will be described. The vehicle display device 1 is a combination meter installed in front of the vehicle interior of the vehicle, and includes a display board 10, a rotation pointer 20, a light source 30, a movement 40, a display unit 50, a control unit 60, and the like.

  The display board 10 is formed by laminating at least a light-shielding printing layer on a translucent substrate such as polycarbonate resin, and has an annular flat plate shape. The display board 10 is disposed with one plate surface facing the display side so that the driver's seat side in the passenger compartment is the display side. The display panel 10 has a circular exposure window 12 that exposes the display unit 50 formed by an inner peripheral hole. Further, the display plate 10 is formed with an arc groove shaped guide passage 14 penetrating in the plate thickness direction.

  As shown in FIG. 1, the display board 10 displays an index row 16 for instructing the vehicle speed as a state value of the vehicle between the exposure window 12 and the pointer passage 14 in the present embodiment. The indicator row 16 includes a plurality of scales 16a arranged on the circumference along the inner peripheral side of the pointer passage 14, and a plurality of characters 16b arranged in the vicinity of the predetermined scale 16a. Each scale 16a and each character 16b is formed from a through-hole penetrating the light-shielding print layer in the display board 10, and emits light when transmitted through the display side by light from the light source 30. As for the light emission color of each scale 16a and each character 16b, the light emission color of the light source 30 may be used as it is, or the display board 10 may be provided with a semi-transparent printing layer to use the color of the layer. Good.

  As shown in FIGS. 1 and 2, the rotation pointer 20 is made of a translucent material such as polycarbonate resin and has a substantially U-shape as a whole. The rotation pointer 20 has the display plate 10 sandwiched between both end portions 20a and 20b, and the intermediate portion 20c is loosely inserted into the pointer passage 14 of the display plate 10. A base end portion 20 a located behind the display plate 10 in the rotation pointer 20 is connected to the movement 40. Thereby, the rotation pointer 20 can be rotated while moving the intermediate portion 20 c along the arc direction of the pointer passage 14. The distal end portion 20b located on the display side of the rotation pointer 20 with respect to the display plate 10 points to the index row 16 at a position corresponding to the rotation position. The rotation pointer 20 emits light while guiding the illumination light toward the distal end portion 20b side by illuminating the intermediate portion 20c and the like with light from the light source 30.

  The light source 30 is made of a light emitting diode, for example, and is disposed behind the display panel 10. The light source 30 emits light when energized to illuminate the display panel 10 and the rotation pointer 20 directly or via a light guide (not shown).

  As shown in FIG. 2, the movement 40 is composed of, for example, a coil actuator or a stepping motor, and is disposed behind the display unit 50. The movement 40 rotationally drives the rotation pointer 20 whose base end portion 20 a is connected to the output shaft 42 by energizing the movement 40.

  As shown in FIGS. 1 and 2, the display unit 50 includes a liquid crystal panel 52 and a backlight 54. The liquid crystal panel 52 is attached to the display board 10 via a bracket 55 so that the screen 56 faces the display side, and the central portion of the screen 56 is exposed through the exposure window 12. The liquid crystal panel 52 is a dot matrix type TFT transmissive liquid crystal monitor in which a plurality of liquid crystal pixels are arranged in a matrix to form a screen 56, and full color image display is realized by driving these liquid crystal pixels. Here, each liquid crystal pixel of the screen 56 in the present embodiment is composed of sub-pixels R, G, and B of three colors provided with red, green, and blue color filters, respectively, and control of gradation values of these sub-pixels. In accordance with the above, each pixel is driven.

  As shown in FIG. 1, the liquid crystal panel 52 displays the two zones 58 and 59 on the inner peripheral side of the index row 16 by driving the constituent pixels of the screen 56 exposed from the exposure window 12. Here, in the present embodiment, one first zone 58 is displayed adjacent to the peripheral portion of the second zone 59 in a form surrounding the outer peripheral side of the other second zone 59. In the present embodiment, the first zone 58 is displayed in a larger area than the second zone 59, and the area ratio between the zones 58 and 59 is always fixed.

  In the display of the zones 58 and 59 on the liquid crystal panel 52, the gradation value of a sub-pixel that needs density for the color representation of the display among the sub-pixels of the liquid crystal pixel corresponding to each of the zones 58 and 59 is larger than 0. This is realized by controlling the gradation values of the remaining sub-pixels to 0. Therefore, in the following description, among the sub-pixels of the liquid crystal pixels that display the zones 58 and 59, the gradation values of the sub-pixels that require a density for the expression of the hue of the display are particularly described as “the pixel gradations of the zones 58 and 59”. This is described as “value”.

  The backlight 54 includes, for example, a light emitting diode and a diffusion plate, and is disposed behind the liquid crystal panel 52 and attached to the display plate 10 via a bracket 55. The backlight 54 emits light when energized, thereby transmitting and illuminating the liquid crystal panel 52 to the display side to emit a display image on the screen 56.

  The control unit 60 includes a control circuit 62, a light control switch 64, an illuminance sensor 66, and the like. The control circuit 62 is composed of, for example, a microcomputer and is disposed behind the display panel 10. The control circuit 62 is electrically connected to the light source 30, the movement 40, the liquid crystal panel 52 and the backlight 54 of the display unit 50. Further, the control circuit 62 is also electrically connected to the light control switch 64 and the illuminance sensor 66 of the control unit 60 and the vehicle state value sensor 2. Here, the state value sensor 2 detects the vehicle speed as a vehicle state value indicated by the index row 16 and the rotation pointer 20 and outputs a state value signal representing the detection result to the control circuit 62.

  The light control switch 64 is a column switch for turning on and off the vehicle light, and is installed in the vicinity of the driver's seat of the vehicle and can be operated by a passenger. The light control switch 64 has three operations corresponding to a small lighting state in which the small light and the tail light are turned on, a full lighting state in which the headlight and the tail light are turned on, and a light-off state in which all the lights are turned off. The position is set. The light control switch 64 outputs to the control circuit 62 a light on / off signal indicating the state of the light corresponding to the operation position.

  The illuminance sensor 66 is made of, for example, a phototransistor or a photodiode, and is installed on the upper part of the instrument panel 4 on which outside light of the vehicle enters through the windshield 3. The illuminance sensor 66 detects the illuminance of the incident external light and outputs an illuminance signal representing the detection result to the control circuit 62.

  As described above, in the control unit 60, the control circuit 62 controls the light source 30 and the movement 40 based on the state value signal from the state value sensor 2, the on / off signal from the light control switch 64, and the illuminance signal from the illuminance sensor 66. Control energization. Further, in the control unit 60, the control circuit 62 supplies power to the backlight 54 and the pixel levels of the zones 58 and 59 of the liquid crystal panel 52 based on the lighting / lighting signal from the light control switch 64 and the illuminance signal from the illuminance sensor 66. The key value is controlled.

(Control flow)
Next, the control flow of the liquid crystal panel 52 executed by the control circuit 62 will be described according to the flowchart shown in FIG. This control flow starts when power is supplied to the control circuit 62 when the ignition switch of the vehicle is turned on or the like, and ends when the power supply is stopped when the ignition switch is turned off or the like.

  In S <b> 101 of the control flow, the current state of the vehicle light is confirmed based on a light on / off signal from the light control switch 64. As a result, when the confirmed light state is the off state, the process proceeds to S102, whereas when the confirmed light state is the small lighting state or the full lighting state, the process proceeds to S105.

  In S102 in a state in which all the lights are turned off in the vehicle, an illuminance signal from the illuminance sensor 66 indicates whether or not the first illuminance condition necessary for switching the state of the light with respect to the current external light illuminance of the vehicle is satisfied. Judge based on. Here, the first illuminance condition is that the illuminance outside light detected by the illuminance sensor 66 is less than the set illuminance Is when the minimum illuminance necessary for safe driving of the vehicle in the light-off state is set as the set illuminance Is. It is a condition. The set illuminance Is can be set as appropriate according to the specification of the vehicle. For example, in the present embodiment, the illuminance is about 3000 lx.

When a negative determination is made in S102, the process proceeds to S103, and the normal mode at turn-off as one control mode is performed. Specifically, in the normal mode at the time of extinction, as shown in FIG. 4, the pixel gradation value of the first zone 58 is controlled to the fixed value Gf that is the minimum value, while the normal value Gn that is larger than the fixed value Gf is controlled. The pixel gradation value of the second zone 59 is controlled. As a result, as shown in FIG. 4, a display brightness Ln higher than the display brightness Lf of the first zone 58 is realized in the second zone 59, so that the contrast ratio of the zones 58 and 59 becomes the normal ratio Lf: Ln. Become. Here, the normal ratio Lf: Ln is an appropriate ratio for ensuring the visibility of the zones 58 and 59 by the occupant regardless of the illuminance of outside light. Therefore, for example, in the present embodiment, by a display luminance Lf of the first zone 58 3 cd / ^{m 2} and a display luminance Ln of the second zone 59 to 100 cd / ^{m 2,} a contrast ratio of 3: is to 100 .

On the other hand, when an affirmative determination is made in S102, the process proceeds to S104, and a light-off warning mode as another control mode is performed. In the light-off warning mode, as shown in FIG. 4, the pixel gradation value of the first zone 58 is controlled to a fixed value Gf, while being larger than the fixed value Gf and larger than the value Gn in the light-off normal mode. The pixel gradation value of the second zone 59 is controlled to the small turn-off warning value Gwoff. As a result, as shown in FIG. 4, the display brightness Lwoff that is higher than the display brightness Lf of the first zone 58 and lower than the brightness Ln in the normal mode when the lamp is turned off is realized in the second zone 59. , 59 becomes a warning ratio Lf: Lwoff when the lamp is turned off, which is lower than the normal ratio Lf: Ln. In this embodiment, for example, the display brightness Lf of the first zone 58 is 3 cd / m ² and the display brightness Lwoff of the second zone 59 is 10 cd / m ² , so that the contrast ratio is 3 in the normal mode when the light is off. : 100 to 3:10.

  The processing contents of S102 to S104 executed when all the lights are turned off in the vehicle have been described above. However, in the following description, after S105 executed when any one of the lights is turned on, that is, the small lighting state or the full lighting state. The processing contents of the steps will be described.

  In S <b> 105, it is determined based on the illuminance signal from the illuminance sensor 66 whether the second illuminance condition necessary to switch all the lights to the extinguished state of the current external light illuminance of the vehicle is satisfied. Here, the second illuminance condition is a condition in which the external light illuminance detected by the illuminance sensor 66 is equal to or higher than the set illuminance Is.

If a negative determination is made in S105, the process proceeds to S106, and the lighting normal mode as another control mode is performed. Specifically, in the lighting normal mode, as shown in FIG. 4, the pixel gradation values of the first zone 58 and the second zone 59 are set to the fixed value Gf and the normal value Gn, respectively, in the same manner as the normal mode at S103. Control. Therefore, as shown in FIG. 4, when the display brightness Ln higher than the display brightness Lf of the first zone 58 is realized in the second zone 59, the contrast ratio of the zones 58 and 59 becomes the normal ratio Lf: Ln. . Thus, for example, in the present embodiment, by a display luminance Ln of the display luminance Lf of the first zone 58 3 cd / ^{m 2} and the second zone 59 to 100 cd / ^{m 2,} the same as the off normal mode, the contrast ratio 3 : 100.

On the other hand, when an affirmative determination is made in S105, the process proceeds to S107, and further, a lighting warning mode as a control mode is performed. In the lighting warning mode, as shown in FIG. 4, the pixel gradation value of the first zone 58 is controlled to a fixed value Gf, while the maximum value larger than the fixed value Gf and the value Gn in the lighting normal mode. The pixel gradation value of the second zone 59 is controlled to the lighting warning value Gwon. As a result, as shown in FIG. 4, the display luminance Lf higher than the display luminance Lf of the first zone 58 and the luminance Ln in the lighting normal mode is realized in the second zone 59, thereby The contrast ratio becomes a lighting warning ratio Lf: Lwon higher than the normal ratio Lf: Ln. Here, for example, in the present embodiment, by a display luminance Lf of the first zone 58 3 cd / ^{m 2} and the display luminance Lwon second zone 59 to 400 cd / ^{m 2,} 3 of the lighting in the normal mode, the contrast ratio : Increases from 100 to 3: 400.

  Note that after any of the processes of S103, S104, S106, and S107, the process returns to S101 unless the power supply to the control circuit 62 is stopped.

  According to the control flow of the first embodiment described so far, when the first illuminance condition in which the illuminance of outside light is less than the set illuminance Is is satisfied when all lights are turned off, the control mode is switched from the normal mode when the light is turned off to the warning when the light is turned off Switch to mode. By this mode switching, the display brightness of the first zone 58 is maintained at the same brightness Lf as that in the normal mode when the light is turned off, while the display brightness of the second zone 59 is higher than that in the normal mode when the light is turned off. Is also changed to a lower luminance Lwoff. Therefore, the zones 58 and 59 are displayed with a contrast ratio (fractional diagram b) that has been changed to a lower side than the normal mode when the light is extinguished (fractional diagram a), for example, as schematically shown in FIG. Thus, according to the decrease in the display brightness of the second zone 59 and the contrast ratio of each zone 58, 59 in accordance with the decrease in the illuminance of the external light, the necessity of lighting the light is sensibly communicated to the passenger. In addition, since the warning can be surely performed, it is possible to suppress the situation where the lighting is forgotten by the occupant.

  In addition, according to the control flow of the first embodiment, when the small lighting state or the full lighting state in which any light is turned on is confirmed after switching to the warning mode at the time of turning off, the control mode is set to the normal mode when the lighting is turned on. Will be switched to. By this mode switching, the display brightness of the first zone 58 is maintained at the same brightness Lf as the warning mode at the time of turning off, while the display brightness of the second zone 59 is the same as that of the normal mode at the time of turning off before switching to the warning mode at turning off. The brightness is changed to the same luminance Ln. Therefore, the zones 58 and 59 have the same contrast ratio as that in the normal mode when the light is turned off (partial diagram c), which is changed to a higher side than the warning mode when the light is turned off (partial diagram b), as schematically shown in FIG. Therefore, the visibility of the zones 58 and 59 is secured again.

  Further, according to the control flow of the first embodiment, the control mode is turned on when the second illuminance condition in which the external light illuminance is equal to or greater than the set illuminance Is in the small lit state or the fully lit state in which any light is lit. The normal mode is switched to the lighting warning mode. By this mode switching, the display brightness of the first zone 58 is maintained at the same brightness Lf as that in the lighting normal mode, while the display brightness of the second zone 59 is higher than that in the lighting normal mode in the range higher than the brightness Lf. Is also changed to a higher luminance Lwon. Therefore, the zones 58 and 59 are displayed with a contrast ratio (fractional diagram d) changed to a higher side than the normal mode during lighting (fractional diagram c), for example, as schematically shown in FIG. As described above, the display brightness of the second zone 59 and the contrast ratio of each of the zones 58 and 59 increase as the illuminance of the outside light increases. In addition, since the warning can be surely performed, it is possible to suppress the situation where the turn-off is forgotten by the occupant.

  Still further, according to the control flow of the first embodiment, after all the lights are turned off after switching to the lighting warning mode, the control mode is switched to the normal mode when turned off. By this mode switching, the display brightness of the first zone 58 is maintained at the same brightness Lf as the lighting warning mode, while the display brightness of the second zone 59 is the same as the lighting normal mode before switching to the lighting warning mode. It is changed to the same luminance Ln. Therefore, the zones 58 and 59 have the same contrast ratio as the normal mode during lighting (fractional diagram a), which is changed to a lower side than the lighting warning mode (fractional diagram d) as schematically shown in FIG. Therefore, the visibility of the zones 58 and 59 is ensured again.

  In the first embodiment described above, the display unit 50 corresponds to the “display unit” described in the claims, the liquid crystal panel 52 corresponds to the “image display unit” described in the claims, and the illuminance. The sensor 66 corresponds to the “detection means” recited in the claims. Further, the control circuit 62 that executes S101 of the control flow corresponds to the “confirming means” described in the claims, and the control circuit 62 that executes S102 to S107 of the control flow is “variable” described in the claims. It corresponds to “means”.

(Second embodiment)
As shown in FIGS. 6-8, 2nd embodiment of this invention is a modification of 1st embodiment. In the control flow in the second embodiment, as shown in the flowchart of FIG. 6, the processing contents of S203, S204, S206, and S207 for implementing each control mode are the same as those in the first embodiment of S103, S104, S106, and S107. It is different from the processing contents of.

Specifically, in the normal mode when the light is turned off in S203, as shown in FIG. 7, the pixel gradation value of the first zone 58 is controlled to the maximum light-off fixed value Gfoff, while the light is turned off smaller than the fixed value Gfoff. The pixel gradation value of the second zone 59 is controlled to the normal time value Gnoff. As a result, as shown in FIG. 7, the display luminance Lnoff lower than the display luminance Lfoff of the first zone 58 that is the highest luminance is realized in the second zone 59, so that the contrast ratio of the zones 58 and 59 is increased. When turned off, the normal ratio Lfoff: Lnoff. Here, with regard to the normal ratio Lfoff: Lnoff at the time of extinction, the visibility of the zones 58 and 59 by the occupant is ensured particularly when the first illuminance condition in S102 is not established, that is, when the external light illuminance is equal to or greater than the set illuminance Is. It is set as the ratio optimized. Therefore, for example, in the present embodiment, by a display luminance Lfoff the first zone 58 400 cd / ^{m 2} and the display luminance Lnoff second zone 59 and 15 cd / ^{m 2,} a contrast ratio 400: it is to the 15 .

In the light-off warning mode in S204, as shown in FIG. 7, the pixel gradation value of the first zone 58 is controlled to the light-off fixed value Gfoff, while being smaller than the fixed value Gfoff and the value in the light-off normal mode. The pixel gradation value of the second zone 59 is controlled to a turn-off warning value Gwoff larger than Gnoff. As a result, as shown in FIG. 7, a display luminance Lwoff that is lower than the display luminance Lfoff of the first zone 58 having the highest luminance and higher than the luminance Lnoff in the normal mode when the light is off is realized in the second zone 59. Thus, the contrast ratio of the zones 58 and 59 becomes the warning ratio Loff off: Lwoff at the time of turn-off which is lower than the normal ratio Lfoff: Lnoff at the time of turn-off. In this embodiment, for example, the display brightness Lfoff of the first zone 58 is set to 400 cd / m ² and the display brightness Lwoff of the second zone 59 is set to 100 cd / m ² , so that the contrast ratio is 400 in the normal mode when the light is turned off. : 15 to 400: 100.

In the lighting normal mode of S206, as shown in FIG. 7, the pixel gradation value of the first zone 58 is controlled to the minimum lighting fixed value Gfon that is smaller than the lighting fixed value Gfoff. On the other hand, in the lighting normal mode, the pixel gradation value of the second zone 59 is larger than the lighting fixed value Gfon of the first zone 58 and the same value Gwoff in the lighting warning mode as shown in FIG. Control to normal value Gnon when lit. As a result, as shown in FIG. 7, in the first zone 58, the lowest luminance Lfon that is inverted to the lower side with respect to the highest luminance Lfoff in the turn-off warning mode is realized. A display brightness Lnon higher than the brightness Lfon and the same as the brightness Lwoff in the turn-off warning mode is realized. Therefore, the contrast ratio of the zones 58 and 59 is the normal ratio Lfo: Lnon during lighting. Here, with regard to the normal ratio Lfo: Lnon at the time of lighting, the visibility of the zones 58 and 59 by the occupant is ensured particularly when the second illuminance condition by S105 is not established, that is, when the external light illuminance is less than the set illuminance Is. It is set as the ratio optimized. Therefore, for example, in the present embodiment, by a display luminance Lfon the first zone 58 3 cd / ^{m 2} and the display luminance Lnon second zone 59 to 100 cd / ^{m 2,} a contrast ratio of 3: is to 100 .

In the lighting warning mode of S207, the pixel gradation value of the first zone 58 is controlled to the lighting fixed value Gfon as shown in FIG. On the other hand, in the lighting warning mode, as shown in FIG. 7, the pixel gradation value of the second zone 59 is smaller than the value Gnon in the lighting normal mode and is the same as the value Gnoff in the lighting normal mode. The warning value Gwon is controlled to be larger than the fixed value Gfon when the first zone 58 is lit. As a result, as shown in FIG. 7, in the second zone 59, the display luminance Lwon that is higher than the display luminance Lfon of the first zone 58 that is the lowest luminance and lower than the luminance Lnon in the normal mode when lit is off. The brightness Lnoff is the same as that in the normal mode. Accordingly, the contrast ratio of the zones 58 and 59 is the lighting warning ratio Lfon: Lwon which is lower than the lighting normal ratio Lfon: Lnon. Here, for example, in this embodiment, the display luminance Lfon of the first zone 58 is 3 cd / m ² and the display luminance Lwon of the second zone 59 is 15 cd / m ² , so that the contrast ratio is 3 in the normal mode when lighting. : 100 to 3:15.

  According to the control flow of the second embodiment described so far, when the first illuminance condition is satisfied when all the lights are turned off, the display brightness of the first zone 58 is changed by switching from the normal mode when the light is turned off to the warning mode when the light is turned off. Is held at the same maximum luminance Lfoff as in the normal mode when the light is off. At this time, the display brightness of the second zone 59 is changed to a brightness Lwoff higher than that in the normal mode when the light is extinguished in a brightness range lower than that of the first zone 58. For example, as schematically shown in FIG. , 59 changes to a lower side than the normal mode when the lights are turned off (minute diagram b) (minute diagram b). In this way, the display brightness of the second zone 59 increases so as to approach the display brightness of the first zone 58 that is set to the maximum brightness Lfoff in accordance with the ambient light illuminance that is equal to or higher than the set illuminance Is in the normal mode when the light is off. Accordingly, the visibility of the zones 58 and 59 decreases following the contrast ratio. Accordingly, the fact that the safety of the host vehicle is reduced due to the ambient light illuminance less than the set illuminance Is that is required to be turned on (for example, the visibility of the front area of the host vehicle is reduced) is indicated by the zones 58 and 59. Since the warning is clearly transmitted to the occupant by virtue of the lowering of the visibility, the situation where the lighting is forgotten by the occupant can be suppressed.

  Further, according to the control flow of the second embodiment, when the small lighting state or the full lighting state of the light is confirmed after switching to the warning mode when the light is turned off, the second zone 59 is displayed by switching to the normal mode when the light is turned on. The brightness is held at the same brightness Lnon as the brightness Lwoff in the off-time warning mode. At this time, the display brightness of the first zone 58 is reversed and changed from the maximum brightness Lfoff in the warning mode at the time of extinction to the minimum brightness Lfon. Therefore, each of the zones 58 and 59 has a contrast ratio optimized for outside light illuminance less than the set illuminance Is, for example, as schematically shown in FIG. Since the display is switched to the display (part c), visibility is ensured again.

  Furthermore, according to the control flow of the second embodiment, when the second illuminance condition is satisfied in the small lighting state or the full lighting state of the light, the display of the first zone 58 is performed by switching from the lighting normal mode to the lighting warning mode. The brightness is kept at the same minimum brightness Lfon as that in the normal mode during lighting. At this time, since the display brightness of the second zone 59 is changed to a brightness Lwon lower than the normal mode during lighting in a brightness range higher than that of the first zone 58, for example, as shown schematically in FIG. , 59 change to a lower side than the normal mode during lighting (minute c) (minute d). In this way, the display brightness of the second zone 59 is lowered so as to approach the display brightness of the first zone 58 that is set to the minimum brightness Lfon in accordance with the ambient light illuminance less than the set illuminance Is in the normal mode during lighting. Accordingly, the visibility of the zones 58 and 59 decreases following the contrast ratio. Therefore, it is possible to reduce the safety of the other vehicle due to the external light illuminance that is equal to or higher than the set illuminance Is that is required to turn off the light (for example, a decrease in visibility from the other vehicle with respect to the tail lamp of the own vehicle). Since the visibility of 59 is transmitted to the occupant sensuously by the decrease in the visibility of 59, it is possible to clearly and surely give a warning, so it is possible to suppress the situation where the turn-off is forgotten by the occupant.

  Furthermore, according to the control flow of the second embodiment, when it is confirmed that all the lights are turned off after switching to the lighting warning mode, the display brightness of the second zone 59 is changed to the normal mode when the lighting is turned off. It is held at the same luminance Lnoff as the luminance Lwon in the lighting warning mode. At this time, the display luminance of the first zone 58 is inverted and changed from the lowest luminance Lfon in the lighting warning mode to the highest luminance Lfoff. Therefore, each of the zones 58 and 59 has, for example, a contrast ratio optimized for external light illuminance equal to or higher than the set illuminance Is from a reduced contrast ratio (fractional diagram d) in the lighting warning mode as schematically shown in FIG. Since the display is switched to the display in (fractional diagram a), the visibility is secured again.

  In the second embodiment described above, the control circuit 62 that executes the control flows S102, S203, S204, S105, S206, and S207 corresponds to the “variable means” recited in the claims.

(Third embodiment)
As shown in FIGS. 9 to 11, the third embodiment of the present invention is a modification of the first embodiment. In the control flow in the third embodiment, as shown in the flowchart of FIG. 9, the processing contents of S303, S304, S306, and S307 for implementing each control mode are the same as those in S103, S104, S106, and S107 in the first embodiment. It is different from the processing contents of.

  Specifically, in the normal mode when S303 is turned off, as shown in FIG. 10, the display areas of the zones 58 and 59 are controlled to normal values Sn1 and Sn2 (Sn1> Sn2 in the present embodiment), respectively. The area ratio of the zones 58 and 59 is assumed to be the normal ratio Sn1: Sn2. At this time, the contrast ratio of the zones 58 and 59 is set to the normal ratio Lf: Ln as in S103 of the first embodiment.

  In the off-time warning mode in S304, as shown in FIG. 10, the display area of the first zone 58 has a warning value Sw1 smaller than the normal value Sn1, and the display area of the second zone 59 has a warning value Sw2 larger than the normal value Sn2. (In this embodiment, Sw1> Sw2), and the area ratio of the zones 58 and 59 is set to the warning ratio Sw1: Sw2. At this time, the display areas of the zones 58 and 59 are controlled so that the sum of the warning values Sw1 and Sw2 matches the sum of the normal values Sn1 and Sn2. At this time, the contrast ratio of the zones 58 and 59 is set to the turn-off warning ratio Lf: Lwoff as in S104 of the first embodiment.

  In the normal mode when lighting in S306, the display areas of the zones 58 and 59 are controlled to the same normal values Sn1 and Sn2 as in the normal mode when extinguished as shown in FIG. The normal ratio is Sn1: Sn2. At this time, the contrast ratio of the zones 58 and 59 is set to the normal ratio Lf: Ln as in S106 of the first embodiment.

  In the lighting warning mode of S307, the display areas of the zones 58 and 59 are controlled to the same warning values Sw1 and Sw2 as in the lighting warning mode, respectively, as shown in FIG. The warning ratio is Sw1: Sw2. At this time, the contrast ratio of the zones 58 and 59 is set to the lighting warning ratio Lf: Lwon as in S107 of the first embodiment.

  According to the control flow of the third embodiment described so far, as shown in FIG. 11 (each of the divided drawings a to d corresponds to FIG. 5 of the first embodiment), not only the contrast ratio of the zones 58 and 59 but also the zones 58 and 59. The area ratio of the zones 58 and 59 also changes according to switching between the control modes. According to such a combined change, it is possible to increase the transmission accuracy when the illuminance of the external light becomes the required illuminance for switching the state of the light, and thus the effect of suppressing forgetting about the state switching.

  In the above third embodiment, the control circuit 62 that executes S102, S303, S304, S105, S306, and S307 of the control flow corresponds to the “variable means” recited in the claims.

(Other embodiments)
Although a plurality of embodiments of the present invention have been described above, the present invention is not construed as being limited to these embodiments, and can be applied to various embodiments without departing from the scope of the present invention. .

  Specifically, as shown in FIG. 12, a second zone 59 is displayed side by side on the periphery of the first zone 58 on the screen 56 of the liquid crystal panel 52, and the contrast ratio and area ratio of the zones 58 and 59 are displayed. May be changed according to the first to third embodiments. Further, when changing the contrast ratio of the zones 58 and 59, the hue of each of the zones 58 and 59 may be changed by controlling the pixel gradation value. Furthermore, the area ratio of the zones 58 and 59 in the second embodiment may be changed according to the third embodiment. In addition, the contrast ratio and area ratio of the zones 58 and 59 are changed according to the display luminance (pixel gradation value) of the first zone 58 together with or instead of the display luminance (pixel gradation value) of the second zone 59. You may do it.

  The zones 58 and 59 may be lit and displayed by illuminating the display panel 10 by the light source 30 according to the index row 16 instead of illuminating and displaying by illuminating the liquid crystal panel 52 by the backlight 54. Further, the image display of the zones 58 and 59 may be realized by using, for example, an EL (Electro-Luminescence) panel or the like instead of the liquid crystal panel 52. Furthermore, the index row 16 and the rotation pointer 20 may be displayed as an image by “display means” for displaying the zones 58 and 59 such as the liquid crystal panel 52 instead of being displayed on the display panel 10. In addition, the vehicle state value instructed by the index row 16 and the rotation pointer 20 may be, for example, the remaining amount of fuel, the coolant temperature, the engine speed, etc. in addition to the vehicle speed.

  In addition to the vehicle display device 1 that functions as a combination meter, the present invention can be applied to, for example, a vehicle display device as a head-up display that displays a virtual image of the zones 58 and 59 and the like on the combiner.

It is a front view which shows the basic composition of the display apparatus for vehicles by 1st embodiment of this invention. It is a figure which shows the basic composition of the display apparatus for vehicles by 1st embodiment of this invention, Comprising: One part is a schematic diagram corresponded in the II-II sectional drawing of FIG. 3 is a flowchart showing a control flow of the liquid crystal panel executed by the control circuit of FIG. 2. It is a characteristic view for demonstrating the processing content of the control flow of FIG. It is a schematic diagram for demonstrating the effect exhibited by the control flow of FIG. It is a flowchart which shows the control flow of the liquid crystal panel performed by the control circuit of the display apparatus for vehicles by 2nd embodiment of this invention. It is a characteristic view for demonstrating the processing content of the control flow of FIG. It is a schematic diagram for demonstrating the effect exhibited by the control flow of FIG. It is a flowchart which shows the control flow of the liquid crystal panel performed by the control circuit of the display apparatus for vehicles by 3rd embodiment of this invention. It is a characteristic view for demonstrating the processing content of the control flow of FIG. It is a schematic diagram for demonstrating the effect exhibited by the control flow of FIG. It is a front view which shows the modification of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus for vehicles, 2 State value sensor, 10 Display board, 12 Exposed window, 14 Pointer passage, 16 Indicator row, 16a Scale, 16b Character, 20 Rotation pointer, 30 Light source, 40 Movement, 50 Display unit (display means) , 52 Liquid crystal panel (image display unit), 54 Backlight, 56 screen, 58 First zone, 59 Second zone, 60 Control unit, 62 Control circuit (variable means / confirming means), 64 Light control switch, 66 Illuminance sensor (Detection means)

Claims (17)

Display means for displaying the second zone in the periphery of the first zone in the vehicle;
Detecting means for detecting the ambient light illuminance of the vehicle;
Variable means for changing the contrast ratio of the first zone and the second zone in the display means when an illuminance condition for switching the state of the vehicle light is established for the external light illuminance detected by the detection means;
Equipped with a,
The display means is configured to display one of the first zone and the second zone adjacent to each other on an inner peripheral side of an index row displayed side by side on a circumference in order to indicate a state value of the vehicle by a rotation pointer. A display device for a vehicle, wherein the display is surrounded by the other .   The vehicle display device according to claim 1, wherein the variable unit sets the illuminance condition as a condition where the illuminance of the external light is less than a set illuminance.   The vehicle display device according to claim 1, wherein the variable unit sets the illuminance condition as a condition where the illuminance of the external light is equal to or higher than a set illuminance.   The variable means changes the contrast ratio by changing display brightness of at least one of the first zone and the second zone in the display means. The vehicle display device according to the item.   5. The variable means according to claim 4, wherein the variable means changes the contrast ratio by maintaining the display brightness of the first zone and changing the display brightness of the second zone in the display means. Vehicle display device. A confirmation means for confirming the state of the light;
The variable means having the illuminance condition as a condition where the external light illuminance is less than a set illuminance is the first display in the display means when the illuminance condition is satisfied in the light extinction state confirmed by the confirmation means. The vehicle display device according to claim 5, wherein the display brightness of the zone is maintained and the display brightness of the second zone is lowered.   The variable means holds the display brightness of the first zone in the display means and is higher than the display brightness of the first zone when the illuminance condition is satisfied in the light-off state confirmed by the confirmation means. The vehicle display device according to claim 6, wherein the display brightness of the second zone is lowered in a high range.   The variable means is configured to display the display brightness of the first zone in the display means when the confirmation means confirms that the light is switched from the off state to the on state after reducing the display brightness of the second zone. The vehicle display device according to claim 6, wherein the display brightness of the second zone is increased and the display brightness of the second zone is increased. A confirmation means for confirming the state of the light;
The variable means having the illuminance condition as a condition that the external light illuminance is equal to or higher than a set illuminance is the first display in the display means when the illuminance condition is satisfied in the lighting state of the light confirmed by the confirmation means. The vehicle display device according to claim 5, wherein the display luminance of the zone is maintained and the display luminance of the second zone is increased.   The variable means holds the display brightness of the first zone in the display means and is higher than the display brightness of the first zone when the illuminance condition is satisfied in the lighting state of the light confirmed by the confirmation means. The vehicle display device according to claim 9, wherein the display brightness of the second zone is increased in a high range.   The variable means is configured to increase the display brightness of the first zone in the display means when the confirmation means confirms that the light is switched from the on state to the off state after increasing the display brightness of the second zone. The vehicle display device according to claim 9 or 10, wherein the display brightness of the second zone is reduced. A confirmation means for confirming the state of the light;
The variable means having the illuminance condition as a condition where the external light illuminance is less than a set illuminance is the first display in the display means when the illuminance condition is satisfied in the light extinction state confirmed by the confirmation means. 6. The vehicular display device according to claim 5, wherein the display luminance of the second zone is increased in a range that maintains the display luminance of the zone and is lower than the display luminance of the first zone.   The variable means is configured to increase the display brightness of the second zone in the display means when the confirmation means confirms that the light is switched from the off state to the on state after increasing the display brightness of the second zone. The vehicle display device according to claim 12, wherein the display brightness of the first zone is reversed and the display brightness of the first zone is inverted to the low side. A confirmation means for confirming the state of the light;
The variable means having the illuminance condition as a condition that the external light illuminance is equal to or higher than a set illuminance is the first display in the display means when the illuminance condition is satisfied in the lighting state of the light confirmed by the confirmation means. 14. The display brightness of the second zone is lowered in a range that maintains the display brightness of the zone and is higher than the display brightness of the first zone. 14. Vehicle display device.   The variable means is configured to display the display brightness of the second zone in the display means when the confirmation means confirms switching from the lighting state of the light to the extinguishing state after reducing the display brightness of the second zone. The vehicle display device according to claim 14, wherein the display luminance of the first zone is reversed and the display luminance of the first zone is reversed to the high side. The display means includes an image display unit that displays the first zone and the second zone with a plurality of pixels,
16. The variable means according to claim 4, wherein the variable means variably controls a gradation value of each of the pixels displaying an image of the display luminance change target zone in the image display unit. Vehicle display device.   The variable means, when an illuminance condition for switching the state of the vehicle light with respect to the illuminance of the outside light detected by the detection means is established, the area ratio of the first zone and the second zone in the display means, It changes with the said contrast ratio, The display apparatus for vehicles as described in any one of Claims 1-16 characterized by the above-mentioned.

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