JP2011028136A - Information presentation device, program, and information presentation method - Google Patents

Abstract

An object of the present invention is to eliminate the inconvenience that it becomes difficult to see a display screen or the like when the ambient illuminance changes greatly instantaneously.
Information presenting means comprising information presenting means for presenting predetermined information so as to be recognized visually by causing a predetermined light emitting section to emit light, and illuminance detecting means provided in the vicinity of the information presenting means In the apparatus, based on the detection signal from the illuminance detection means, there is provided control means (steps 31 to 33) for controlling the information presenting means to adjust the light emission luminance of the light emitting unit. If the detected value shows a predetermined large change based on the above (steps 31 and 32), the information is presented immediately so that the emission luminance of the light emitting unit previously associated with the detected value after the change is obtained. The means is controlled (step 33).
[Selection] Figure 3

Description

  The present invention relates to an information presentation apparatus that presents predetermined information, a program suitable for the information presentation apparatus, and an information presentation method.

  At the entrance of a tunnel that suddenly darkens from a bright state during driving of the vehicle, the car audio display screen and key illumination are often dazzling as soon as the vehicle enters the tunnel. Therefore, when entering a tunnel or the like, a technique for adjusting the brightness of a display screen or the like so that the brightness gradually decreases based on the detection value of an illuminance sensor provided in the vicinity of the display screen or the like is known. ing.

  FIG. 4 is a flowchart illustrating a luminance adjustment process in a conventional display device as an example of such a luminance adjustment technique. This process is repeated at predetermined intervals. That is, the display device first acquires the detection value of the illuminance sensor provided in the vicinity of the display device in step 41. Next, in step 42, the brightness level of the current display screen is stored in the variable M. In addition, the brightness level associated in advance with the acquired detection value of the illuminance sensor is stored in the variable N.

  Next, in step 43, M and N are compared. If M = N, there is no need to change the luminance level of the display screen, so the processing of FIG. If M <N, in order to increase the luminance level by one step, M is incremented in step 44, then the luminance level of the display screen is set to M in step 45, and the processing returns to step 43. If M> N, in order to decrease the luminance level by one step, M is decremented in step 46, then the luminance level of the display screen is set to M in step 47, and the processing returns to step 43. In this way, the luminance level of the display screen is gradually adjusted so that the luminance level is associated with the surrounding illuminance in advance.

  According to this, the brightness of the display screen decreases or increases according to the surroundings of the display screen becoming darker or brighter. The luminance level of the display screen gradually changes step by step.

  As a technique for preventing the display on the display device from becoming difficult to see, a technique for switching the luminance level of the display device is known (see, for example, Patent Document 1). In this technique, the luminance level of the display device is switched between a first luminance level corresponding to ambient illuminance in the daytime and a second luminance level corresponding to ambient illuminance at night according to the ambient illuminance. I have to. At this time, the switching to the second luminance level is delayed with respect to the change in ambient illuminance so as to be adapted to the pupil adjustment function.

  Further, the correspondence between the light amount variation time function and the pupil opening amount variation time function, and the correspondence between the pupil opening amount variation time function and the luminance of the display device are stored in advance, and when the light amount around the display device varies, There is also known a technique in which a light quantity variation time function is obtained, a corresponding pupil opening amount variation time function is determined, and luminance of a corresponding display device is determined (for example, see Patent Document 2).

  Further, the brightness of the display device is adjusted so that the target brightness is achieved in a relatively long time when the illuminance is greatly reduced, and the target brightness is achieved in a relatively short time when the illuminance is greatly increased. In addition, a technique for adjusting the luminance of a display device is also known (see, for example, Patent Document 3). In this technique, when adjusting the luminance, contrast control, brightness control, and backlight dimming control are performed based on the maximum value, minimum value, and average value of the luminance of the input signal.

Japanese Unexamined Patent Publication No. 7-117559 Japanese Patent Laid-Open No. 7-234656 JP 2006-285064 A

  However, when the weather is fine, the light that shines on the vehicle is quite strong, but when the vehicle is traveling in a tunnel or underpass, the vehicle is hardly irradiated with light. For this reason, when the vehicle passes through the entrance of a tunnel or the like, the brightness changes instantaneously. According to the conventional brightness adjustment technique as shown in FIG. 4 described above, when entering a tunnel or the like and suddenly darkens, the brightness of the display screen gradually decreases. However, the display screen is not completely darkened. That is, immediately after entering the tunnel, the display screen becomes dazzling for the driver, which may hinder the driver's field of view and hinder safe driving.

  On the other hand, at the exit of the tunnel, the surrounding situation instantly changes from a dark state to a bright state, but the display screen gradually becomes brighter from the dark state. At the moment of exiting the tunnel, the pupil closes relatively quickly, whereas the brightness of the display screen is still low. In this state, since the driver cannot visually recognize the display on the display screen, the driver can perform operations related to the display screen only after waiting for the brightness of the display screen to increase. Since an accurate operation cannot be performed when the display screen is not visible, the volume may be increased while attempting to decrease the volume, which may cause a problem in safe driving.

  In addition, according to the prior art of FIG. 4, the brightness level of the display screen is adjusted so that the brightness level corresponds to the detection value of the illuminance sensor, so that the user can arbitrarily set the brightness level of the display screen. I can't do it.

  An object of the present invention is to provide a technique for solving the disadvantage that the display screen or the like becomes difficult to see when the surrounding illuminance changes greatly instantaneously in a display device or the like in view of the problems of the conventional technology. It is in.

  To achieve this object, an information presentation device according to a first aspect of the present invention provides information presentation means for presenting predetermined information so as to be recognized through vision by causing a predetermined light emitting section to emit light, and the information presentation means Illuminance detection means provided in the vicinity of the illuminance detector and control means for controlling the information presentation means based on a detection signal from the illuminance detection means to adjust the light emission luminance of the light emitting unit, the control means, When the detection value shows a predetermined large change based on the detection signal from the illuminance detection means, the light emission brightness of the light emitting unit associated with the detection value after the change is immediately obtained. The information presenting means is controlled.

  According to a second aspect of the present invention, in the information presentation apparatus according to the first aspect of the present invention, the information presentation apparatus includes a storage unit that stores a preset value of the light emission luminance of the light emitting unit preset by the user. The information presenting means is controlled so that the light emission luminance of the light emitting unit gradually becomes the set value of the light emission luminance of the stored light emitting unit.

  An information presentation device according to a third invention is the information presentation device according to the second invention, wherein the information presentation device is a vehicle-mounted device, and a headlight of a vehicle is turned on in the storage means as a set value of the light emission luminance of the light emitting unit. The setting value when the state is in the state and the setting value when the state is in the off state are stored, and the control means performs the gradually performing control so that the light emission luminance of the light emitting unit is in the on state. In this case, the control is performed so that the set value becomes the on-state set value when it is, and the off-state set value when it is the off state.

  An information presentation apparatus according to a fourth invention is characterized in that, in the second or third invention, the information presentation apparatus further comprises setting means for accepting setting of a setting value of the light emission luminance of the light emitting unit.

  A program according to a fifth invention causes a computer to function as a control means in the information presentation device according to any one of the first to fourth inventions.

  An information presentation method according to a sixth aspect of the present invention is an information presentation process for presenting predetermined information so as to be recognized through vision by causing a predetermined light emitting section to emit light, and illuminance for detecting illuminance in the vicinity of the light emitting section. A detection step, a control step of controlling the light emission luminance of the light emitting unit based on the illuminance detected by the illuminance detection step, and a storage step of accepting and storing the setting of the light emission luminance of the light emitting unit by a user, In the control step, when it is determined that the illuminance has undergone a predetermined large change based on the illuminance detected by the illuminance detection step, the light emission luminance of the light emitting unit associated in advance with the changed illuminance immediately Then, the light emitting unit is controlled so that the light emitting unit is gradually controlled, and then the light emitting unit is gradually controlled so as to be the set value of the light emitting luminance of the light emitting unit stored in the storing step. To.

  ADVANTAGE OF THE INVENTION According to this invention, when the surrounding illumination intensity changes large instantly, it can prevent that the information shown by light emission of a light emission part becomes difficult to recognize visually.

It is a front view of the display part in the display apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the display apparatus which has a display part of FIG. It is a flowchart which shows the luminance adjustment process by the microcomputer of the apparatus of FIG. It is a flowchart which illustrates the luminance adjustment process in the conventional display apparatus.

  FIG. 1 is a front view of a display unit in a display device according to an embodiment of the present invention. This display device is used for in-vehicle audio devices and navigation devices, and is used to display necessary information for the driver or to display for touch panel input by the driver. .

  In the figure, 1 is a display screen provided on the front face of the display section, and 2 is an illuminance sensor provided on the front face of the display section. The illuminance sensor 2 is located in the vicinity of the display screen 1, and the illuminance detection value output from the illuminance sensor 2 represents the illuminance around the display screen 1.

  FIG. 2 is a block diagram showing a configuration of a display device having the display unit of FIG. As shown in the figure, the display device includes the above-described illuminance sensor 2, the above-described display unit 21, the microcomputer 22 that controls the display unit 21 based on the detected illuminance value from the illuminance sensor 2, and the display screen 1 by the user. An operation unit 23 for accepting the setting of the brightness level, and a storage unit 24 for storing the set value of the accepted brightness level. The microcomputer 22 also displays necessary information for the driver or displays for touch panel input by the driver by the display unit 21. The storage unit 24 also stores a correspondence list of each luminance level of the display screen 1 suitable for each detection value of the illuminance sensor 2. Incidentally, as the luminance level of the display screen 1, a high luminance level is appropriate when the illuminance around the display screen 1 is high, and a low luminance level is appropriate when the illuminance is low.

  FIG. 3 is a flowchart showing the brightness adjustment processing by the microcomputer 22. This process is repeatedly performed at predetermined time intervals according to a predetermined program. In this process, the luminance of the display screen 1 is adjusted based on the detected illuminance value output from the illuminance sensor 2.

  That is, when the process is started, the microcomputer 22 first acquires a detection value from the illuminance sensor 2 in step 31. Next, in step 32, it is determined whether or not the difference between the acquired detection value and the previously acquired detection value is greater than or equal to a predetermined threshold value. If it is determined that the threshold value is not greater than or equal to the threshold value, it is not necessary to adjust the luminance, and the process of FIG. If it is determined that the threshold value is greater than or equal to the threshold value, in step 33, the luminance level of the display screen 1 is set to a luminance level corresponding to the detection value acquired this time in step 31. The luminance level corresponding to the detected value can be acquired based on the above-described correspondence list. Thereby, when there is a change in illuminance equal to or greater than the threshold, the luminance level of the display screen 1 instantaneously becomes a luminance level corresponding to the illuminance after the change.

  Next, in step 34, the current luminance level set in step 33 is stored in the variable M. Further, the brightness level set by the user and stored in the storage unit 24 is stored in the variable N. Next, in step 35, variables M and N are compared. If it is determined that N = M, the luminance level on the current display screen 1 matches the luminance level set by the user, and there is no need to change the luminance level. To do. If it is determined that M <N, in order to bring the luminance level of the display screen 1 closer to the luminance level set by the user, the variable M is incremented in step 36 and then the luminance level of the display screen 1 in step 37. Is set to M, and the process returns to step 35. If it is determined that M> N, the variable M is decremented in step 38, the luminance level of the display screen 1 is set to M in step 39, and the process returns to step 35. In this way, the luminance level of the display screen 1 is gradually brought closer to the luminance level set by the user, and when they match, the processing in FIG. 3 is terminated.

  According to this brightness adjustment processing, when the illuminance around the display screen 1 changes significantly, the brightness level of the display screen 1 is instantly changed so as to become a brightness level corresponding to the changed illuminance (step). 33). If the brightness level after the change is different from the brightness level set by the user, then the brightness level of the display screen 1 is gradually adjusted so as to become the brightness level set by the user. (Steps 34 to 39).

  According to the present embodiment, when the illuminance around the display screen 1 changes with a predetermined magnitude, the luminance level of the display screen 1 is immediately changed to a luminance level corresponding to the changed illuminance. Even when the illuminance around the display screen 1 changes greatly, the user can visually recognize the display on the display screen 1 instantaneously. Further, since the luminance level of the display screen 1 is immediately changed according to a large change in illuminance, the luminance level of the display screen 1 is gradually changed to the luminance level set by the user. Brightness level can be maintained.

  For example, even when the surroundings are darkened instantaneously, the display screen is darkened instantaneously, so that it is possible to avoid a situation in which the display content on the display screen cannot be visually recognized immediately after that. Further, even when the surroundings are instantaneously brightened, the display screen is instantly brightened, so that it is possible to avoid a situation in which the display content is dark immediately and cannot be visually recognized. Further, even when the surroundings darken instantaneously during driving, the display screen does not become dazzling, so that the brightness of the display screen can be prevented from obstructing the field of view.

  Note that the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications. For example, the number of brightness level setting values set by the user has not been mentioned in the above description, but the setting values may be a plurality of setting values that differ according to ambient illuminance and the like. For example, as a setting value of the brightness level by the user, a setting value when the headlight of the automobile is off and a setting value when the headlight is on can be set so that the headlight is on or off. Depending on whether or not there is a brightness level stored in the variable N in step 34, the brightness level may be switched. Alternatively, three setting values for night, daytime, and evening can be set, and the luminance level stored in the variable N in the above-described step 34 is the illuminance by the detection value of the illuminance sensor 2 at that time or at that time A setting value for night, daytime, or evening corresponding to the time may be used.

  In the above description, the case where the luminance level of the display screen 1 is targeted as the luminance level to be adjusted has been described. However, the present invention is not limited to this, and predetermined information is recognized through vision by causing a predetermined light emitting unit to emit light. As long as the luminance level of the light emitting unit in the information presenting means to be presented is possible, the luminance level can be adjusted according to the present invention. Here, the predetermined information includes information transmitted by displaying characters and figures, information indicating that there is an incoming call, and information indicating the position when the key position is indicated by light emission. To do. For example, the present invention may be applied by adjusting the brightness level of key illumination in a mobile phone or an ignition key.

  In the above description, the example in which the present invention is applied to an in-vehicle audio device and a navigation device has been described. However, the present invention is not limited to this, and the present invention is also applied to, for example, a home audio device, a portable audio device, and a mobile phone. can do.

  Although not mentioned above, the luminance level setting by the user may be performed by a relative setting as a difference in a plus direction or a minus direction with respect to a predetermined reference value according to the environment. Good.

  In the above description, an illuminance sensor is used to detect illuminance, but a sensing device such as a camera may be used instead.

  1: Display screen, 2: Illuminance sensor, 21: Display unit, 22: Microcomputer, 23: Operation unit, 24: Storage unit.

Claims (6)

Information presenting means for presenting predetermined information so as to be recognized through vision by causing a predetermined light emitting section to emit light;
Illuminance detection means provided in the vicinity of the information presentation means;
Control means for controlling the information presenting means based on a detection signal from the illuminance detecting means to adjust the light emission luminance of the light emitting unit;
When the detection value shows a predetermined large change based on the detection signal from the illuminance detection means, the control means immediately emits light from the light emitting unit associated in advance with the detection value after the change. An information presenting apparatus for controlling the information presenting means so as to have luminance. Storage means for storing a setting value of the light emission luminance of the light emitting unit preset by the user,
The control means controls the information presenting means so that the light emission luminance of the light emitting unit gradually becomes the stored setting value of the light emission luminance of the light emitting unit after the immediate control. The information presentation apparatus according to claim 1, wherein the information presentation apparatus is provided. The information presentation device is for in-vehicle use,
The storage means stores a set value when the vehicle headlight is in an on state and a set value when the vehicle headlight is in an off state as a set value of the light emission luminance of the light emitting unit,
When the control means performs the gradually performing control, the light emission luminance of the light emitting unit is the set value of the on state when the headlight is in the on state, and when the headlight is in the off state, The information presentation apparatus according to claim 2, wherein the control is performed so that the set value is in an off state.   The information presentation apparatus according to claim 2, further comprising a setting unit that accepts a setting value of a light emission luminance of the light emitting unit.   A program causing a computer to function as control means in the information presentation device according to claim 1. An information presenting step for presenting predetermined information so as to be recognized through vision by causing a predetermined light emitting unit to emit light;
Illuminance detection step for detecting illuminance in the vicinity of the light emitting unit;
Based on the illuminance detected by the illuminance detection step, a control step for controlling the light emission luminance of the light emitting unit,
A storage step of accepting and storing the setting of the light emission luminance of the light emitting unit by the user,
In the control step, when it is determined that the illuminance has undergone a predetermined large change based on the illuminance detected by the illuminance detection step, the light emission of the light emitting unit associated with the changed illuminance in advance is immediately performed. An information presentation method comprising: controlling the light emitting unit so as to obtain luminance, and then gradually controlling the light emitting unit so that the set value of the light emitting luminance of the light emitting unit stored in the storing step is obtained. .

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