JP2013032950A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of making a motion of a pointer image visible smoothly, even when a rotation angle of the pointer image between frames is large.SOLUTION: The display device includes: a display panel capable of displaying a pointer image representing a rotating slender pointer and a locus image representing a locus of a motion of the pointer image; and control means for controlling a display state of the display panel so as to enable the pointer images and the locus images of multiple frames to be consecutively switched and displayed. Among the multiple frames, a locus image in a predetermined frame is provided between a rotation position of the pointer image in the predetermined frame and a position corresponding to a rotation position of the pointer image displayed in a frame previous to the predetermined frame by one or more, and is formed as an image having the same shape as the pointer image.

Description

  The present invention relates to a display device that displays a pointer image on a display panel.

  As a conventional display device, for example, the one disclosed in Patent Document 1 is known. The display device of Patent Document 1 displays a rotating pointer image, a display panel that can display a locus image representing a movement locus of the pointer image, and pointer images and locus images in a plurality of frames that change with time. Control means for continuously switching over time and controlling the display state on the display panel.

  The trajectory image is formed so as to form a fan shape between the pointer image in the current frame and the pointer image in the previous frame, and further, the pointer image in the radial direction or the circumferential direction. It is formed as a gradation that gradually changes from the color tone to the background color of the pointer image. As a result, even when the rotation angle between the frames of the pointer image is large, the rotation of the pointer image is not visually recognized by the viewer as if it is stepped. It is possible to visually recognize the movement smoothly.

Japanese Patent No. 4536766

  However, in a rotating elongated pointer image, the rotation speed differs between the rotation center side and the tip side of the pointer, so that when the rotation angle is large, the rotation of the pointer is caused by the visual illusion of the viewer. There may be a case where the moving center side and the distal end side are mixed together as two pointers, and the pointer itself appears to rotate while moving forward and backward.

  In view of the above problems, an object of the present invention is to provide a display device capable of smoothly visualizing the movement of a pointer image even when the rotation angle of the pointer image between frames is large. To do.

  In order to achieve the above object, the present invention employs the following technical means.

In the invention according to claim 1, a display panel capable of displaying a pointer image representing a rotating elongated pointer, and a locus image representing a movement locus of the pointer image;
Control means for controlling the display state of the display panel so that a pointer image of a plurality of frames and a trajectory image can be continuously switched and displayed;
Among the plurality of frames, the trajectory image in the predetermined frame corresponds to the rotation position of the pointer image in the predetermined frame and the rotation position of the pointer image displayed in one or more frames before the predetermined frame. And an image having the same shape as the pointer image.

  According to the present invention, the trajectory image having the same shape as the pointer image is displayed in the region where the pointer image is rotated while the frame moves from the previous frame to the predetermined frame. Therefore, the locus of the pointer image in the rotation area can be clearly recognized. Therefore, even when the rotation angle of the pointer image between the frames is large, it is possible to visually recognize the movement of the pointer image.

  The invention according to claim 2 is characterized in that the one or more previous frames are the previous frames.

  According to the present invention, the trajectory image is displayed while the frame moves from the previous frame to the predetermined frame, and the viewer can clearly recognize the trajectory of the pointer image in the rotation region. . Therefore, even when the rotation angle of the pointer image between the frames is large, it is possible to visually recognize the movement of the pointer image.

  The invention according to claim 3 is characterized in that a plurality of trajectory images are formed in the direction in which the pointer image moves. According to this invention, the viewer can visually recognize the locus of the pointer more clearly.

  According to a fourth aspect of the present invention, the trajectory images are arranged at equal intervals in the direction in which the pointer image moves. According to the present invention, it is possible to obtain a trajectory image that rotates naturally and smoothly.

  In the invention according to claim 5, the trajectory image is arranged so that the distance between adjacent ones increases from the rotation position of the pointer image displayed in one or more previous frames toward the rotation position of the pointer image in a predetermined frame. It is characterized by being arranged as follows. According to the present invention, it is possible to obtain a trajectory image in which the direction of rotation can be easily visually recognized while rotating smoothly.

  The invention described in claim 6 is characterized in that the color tone of the trajectory image is set to be the same as the color tone of the pointer image. According to the present invention, the visibility of the trajectory image can be improved.

  In the invention according to claim 7, the color tone of the trajectory image is set based on the color tone of the pointer image, and the pointer image displayed in the frame one or more before the rotation position of the pointer image in the predetermined frame is displayed. It is characterized in that it is set so that it gradually becomes thinner, gradually becomes transparent, or gradually becomes black as it goes to the rotational position. According to the present invention, since it is possible to have a gradation effect that moves from the rotation position of one or more previous frames to the rotation position of a predetermined frame, it is possible to visually recognize the direction of rotation. An easy trajectory image can be obtained.

  The invention according to claim 8 is characterized in that the pointer image indicates the rotational speed of the vehicle engine. According to the present invention, in the pointer image that displays the engine speed, the rotation speed of the pointer can often increase, so that the effect for visually recognizing the movement of the pointer image can be greatly obtained. .

It is a circuit block diagram which shows the circuit of the display apparatus in 1st Embodiment. It is a front view which shows the rotation speed meter image in the liquid crystal panel in FIG. It is a flowchart which shows the control flow which CPU and drawing IC in FIG. 1 perform. It is a front view which shows the rotation speed meter image in 2nd Embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also a combination of the embodiments even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, the display apparatus 1 in 1st Embodiment is demonstrated based on FIGS. 1-3. 1 is a circuit configuration diagram showing a circuit of the display device 1, FIG. 2 is a front view showing a rotation meter image 5 in the liquid crystal panel 2 in FIG. 1, and FIG. 3 is executed by the CPU 3 and the drawing IC 4 in FIG. It is a flowchart which shows the control flow to do.

  As shown in FIG. 1, a display device 1 is used as a display device for a vehicle such as an automobile, for example, a liquid crystal panel 2 as a display panel, a CPU (Central Processing Unit) 3 as a control means, a ROM ( A read only memory (RAM) 31, a RAM (random access memory) 34, a drawing IC (integrated circuit) 4 and the like are provided. Here, the display device 1 is, for example, a rotation speed meter that displays the rotation speed of the vehicle engine.

  The liquid crystal panel 2 is an active matrix type panel of a type in which a plurality of pixels are formed in a matrix and driven by a thin film transistor (TFT) not shown. Each pixel contains a red pixel, a green pixel, and a blue pixel. The light transmittance of each of the red pixel, the green pixel, and the blue pixel is controlled by applying a voltage to the gate of the TFT and controlling the voltage applied to the red pixel, the green pixel, and the blue pixel. . A light emitting diode that emits white light (not shown) is disposed behind the liquid crystal panel 2, and the light emitting diode transmits and illuminates the liquid crystal panel 2. The white light emitted from the light-emitting diode is transmitted and illuminated to each pixel in which the light transmittance of each of the red pixel, the green pixel, and the blue pixel is controlled, so that the liquid crystal panel 2 can perform full color display.

  The CPU 3 takes in the rotational speed signal from the rotational speed sensor 6 that detects the rotational speed of the engine of the vehicle and outputs it to the drawing IC 4. The CPU 3 operates with power supplied from the battery 8 via the ignition switch 7 of the vehicle.

  The ROM 31 includes a polygon data storage unit 32 and an image data storage unit 33. Polygon data of the rotation speed meter image 5 shown in FIG. 2 is stored in the polygon data storage section 32, and image data of the rotation speed meter image 5 is stored in the image data storage section 33. The polygon data is composed of a plurality of polygons (generally, triangular planes) obtained by dividing the display space of the rotational speed meter image 5, and the image data is composed of textures attached to the respective polygons. That is, the rotational speed meter image 5 is drawn on the liquid crystal panel 2 by pasting each texture of the image data to each polygon of the polygon data.

  In response to an instruction from the CPU 3, polygon data is transferred from the polygon data storage unit 32 to the RAM 34, and similarly, image data is transferred from the image data storage unit 33 to the RAM 34.

  The pixel IC 4 constitutes a control means together with the CPU 3, and is applied to the red pixel, the green pixel, and the blue pixel in each pixel based on the polygon data and image data in the RAM 34, and further on the rotation speed signal captured by the CPU 3. And controlling the display state of each of the plurality of pixels. This display state is controlled by continuously switching images of a plurality of frames. Specifically, the display state is controlled by continuously switching images of 30 frames per second (the display is updated every 33.3 ms). Thereby, each movement of a pointer image 51 and a trajectory image 52 (FIG. 2), which will be described later, is displayed.

  The drawing IC 4 controls each display state of the plurality of pixels based on the polygon data in the polygon data storage unit 32 and the image data in the image data storage unit 33 without transferring the polygon data and the image data to the RAM 34. A configuration is also possible. With the above configuration, the drawing IC 4 displays the rotation speed meter image 5 on the liquid crystal panel 2 as shown in FIG.

  FIG. 2 shows the rotation speed meter image 5 of one predetermined frame among a plurality of continuous frames. The rotation speed meter image 5 includes a pointer image 51 representing a slender, rotating pointer, a trajectory image 52 representing a movement trajectory (rotation trajectory) of the pointer image 51, and a scale on a circular line on the tip side of the pointer image 51. And a character image 54 representing a scale value representative of the scale image 53. The color tone (at least one of hue and brightness) of the pointer image 51 is, for example, red, and the color tone of the background 55 with respect to the pointer image 51 is, for example, black. The scale image 53 and the character image 54 are displayed in white against the black background 55.

  In FIG. 2, the pointer image 51 in a predetermined frame is indicated by a solid line, and the locus image 52 is indicated by a one-dot chain line. Further, in FIG. 2, in order to deepen the understanding, the pointer image 510 in the previous frame with respect to the predetermined frame is indicated by a two-dot chain line on the assumption that the pointer image 510 is in the same position of the predetermined frame. In the predetermined frame, the pointer image 510 is not actually displayed. A pointer image 51 in a predetermined frame in FIG. 2 shows, for example, a state in which the engine speed has instantaneously increased to about 3000 RPM from the state of about 1600 RPM in the previous frame. The trajectory image 52 in the predetermined frame is formed between the rotation position of the pointer image 51 of the predetermined frame and the position corresponding to the rotation position of the pointer image 510 of the previous frame. Hereinafter, in a predetermined frame, an area where the pointer image 51 is assumed to have been rotated from the rotation position corresponding to the pointer image 510 of the previous frame to the rotation position of the pointer image 51 of the predetermined frame, This will be referred to as “rotation region 56”.

  The trajectory image 52 has the same shape as the pointer image 51 and is formed in the rotation area 56. That is, the trajectory image 52 has a shape of a slender pointer that rotates. Here, a plurality of trajectory images 52 are set. The number of the trajectory images 52 is determined by the viewer as the trajectory of the pointer image 51 according to the rotation area 56 (rotation angle) determined between the previous frame and a predetermined frame (hereinafter referred to as “between frames”). The number that can be properly recognized is determined by the CPU 3. The trajectory images 52 are arranged at regular intervals in the rotation area 56 in the direction in which the pointer image 51 moves (rotation direction). Further, the color tone of the trajectory image 52 is set to be the same as the color tone of the pointer image 51 (here, red).

  Next, a control flow executed by the CPU 3 and the drawing IC 4 for displaying the pointer image 51 and the locus image 52 will be described with reference to FIG. A series of control flows from step S10 to step S50 in FIG. 3 corresponds to control of an image of one frame.

  When the ignition switch 7 is turned on, the CPU 3 starts a control flow. In step S10, the CPU 3 takes in the rotational speed signal from the rotational speed sensor 6, and based on this rotational speed signal, the indicated angle of the pointer image 51 and the rotational angle by which the pointer image 51 is rotated from the previous frame. Is calculated. After step S10, in step S20, the CPU 3 determines whether or not the turning angle of the pointer image 51 is zero.

  In step S20, the CPU 3 determines that the rotation angle of the pointer image 51 is not zero and determines NO, that is, if the pointer image 51 is rotating from the previous frame, in step S30, The shape of the trajectory image 52 is calculated based on the instruction angle and the rotation angle calculated in step S10. That is, the CPU 3 sets a trajectory image 52 having the same shape as that of the pointer image 51, and the trajectory image 52 is changed according to the rotation angle so that the viewer can appropriately recognize the trajectory image 52 as the trajectory of the pointer image 51. In addition to determining the number, the entire shape is determined so that the respective trajectory images 52 are arranged in the rotation area 56 (within the rotation angle) at equal intervals. In step S40, the CPU 3 sets the pointer image 51, the polygon data of the trajectory image 52, and the image data based on the instruction angle calculated in steps S10 and S30 and the shape of the trajectory image 52.

  In step S50, in accordance with an instruction from the CPU 3, the drawing IC 4 pastes each texture of the image data on each polygon of the polygon data set in step S40, and the pointer image 51 is displayed on the liquid crystal panel 2 as shown in FIG. And a trajectory image 52 are drawn. Thus, the pointer image 51 and the locus image 52 calculated in step S30 are displayed on the liquid crystal panel 2.

  After step S50, the CPU 3 returns to step S10 and repeats steps S10 to S50 for each frame to be updated. Note that the CPU 3 ends the control flow when the rotation angle is zero and the determination is affirmative in step S20, that is, when the pointer image 51 is not rotating.

  As described above, in the present embodiment, the trajectory image 52 in the rotation area 56 is an image having the same shape as the pointer image 51, so that for the viewer, the trajectory of the pointer image 51 in the rotation area 56 is clear. Can be recognized. Therefore, even when the rotation angle of the pointer image 51 between the frames is large, the visual illusion of the viewer that the pointer itself rotates while moving forward and backward is eliminated, and the movement of the pointer image 51 is visually recognized smoothly. It becomes possible to do.

  In addition, since a plurality of trajectory images 52 are formed in the direction in which the pointer image 51 moves, the viewer can visually recognize the trajectory of the pointer more clearly.

  Further, since the trajectory image 52 is arranged at equal intervals in the direction in which the pointer image 51 moves, the trajectory image 52 can be a trajectory image 52 that rotates naturally and smoothly.

  Further, since the color tone of the trajectory image 52 is set to be the same as the color tone of the pointer image 51, the visibility of the trajectory image 52 can be improved.

(Second Embodiment)
The rotation speed meter image 5 of the second embodiment is shown in FIG. In the second embodiment, the arrangement of the pointers in the trajectory image 52 is changed with respect to the first embodiment.

  In the rotation area 56, the adjacent distances of the trajectory image 52 become narrower from the rotation position of the pointer image 510 displayed in the previous frame toward the rotation position of the pointer image 51 in a predetermined frame. So that they are arranged.

  Thereby, while rotating smoothly, it can be set as the locus | trajectory image 52 which is easy to visually recognize the direction to rotate.

(Third embodiment)
In the first and second embodiments, the color tone of the trajectory image 52 is set to be the same (red) as the color tone of the pointer image 51. However, the present invention is not limited to this, and is changed as follows. Also good.

  That is, the color tone of the trajectory image 52 is set based on the color tone of the pointer image 51, and the rotation of the pointer image 510 displayed in the frame immediately before the rotation position of the pointer image 51 in a predetermined frame. You may set so that it may become thin gradually, it becomes transparent gradually, or it becomes black gradually, so that it goes to a position.

  By making the color tone of the trajectory image 52 gradually lighter toward the rotation position of the pointer image 510, a plurality of trajectory images 52 can have a gradation effect. An easy trajectory image 52 can be obtained.

  In addition, the color tone of the trajectory image 52 becomes transparent as it goes toward the rotation position of the pointer image 510, so that the pointer image 510 of the previous frame among the plural trajectory images 52 is displayed. A close image is melted into the background 55, and a gradation effect that gradually changes so as to approach the original pointer image 51 can be given. 52.

  Also, the color tone of the trajectory image 52 is gradually blackened toward the rotation position of the pointer image 510, so that it is closer to the pointer image 510 of the previous frame among the plurality of trajectory images 52. The object looks like a shadow of the pointer image 51, and can be provided with a gradation effect that sequentially changes so as to approach the original pointer image 51. Similarly to the above, the locus image 52 that makes it easy to visually recognize the turning direction. It can be.

(Other embodiments)
In each of the above embodiments, a plurality of trajectory images 52 have been described. However, the present invention is not limited to this, and one trajectory image 52 is provided in the rotation area 56 depending on the size (rotation angle) of the rotation area 56. It may be provided.

  Further, among the plurality of frames, the trajectory image 52 in a predetermined frame includes the rotation position of the pointer image 51 in the predetermined frame and the rotation of the pointer image 510 displayed in the frame immediately before the predetermined frame. It is arranged between the position corresponding to the position, but the rotation position of the pointer image 51 in the predetermined frame and the frame one or more before (two before, three before, etc.) the predetermined frame It may be provided between the position corresponding to the rotation position of the pointer image displayed in.

  Further, in forming the rotational speed meter image 5, it is formed from polygon data and image data. However, the present invention is not limited to this, and it may be formed from only polygon data.

  In each of the above embodiments, the display device 1 is applied to a rotation speed meter that displays the rotation speed of the engine of the vehicle. However, the display device 1 is not limited thereto, and the vehicle speed, the remaining fuel amount, the battery voltage, and the engine hydraulic pressure are not limited thereto. You may apply to the meter which displays etc.

  The liquid crystal panel 2 can be a monochrome liquid crystal panel that does not perform full color display.

  Further, instead of the liquid crystal panel 2 which is a light receiving type (non-light emitting type) display panel, an EL (electroluminescence) display panel which is a light emitting type display panel may be used.

1 display device 3 CPU (control means)
4 Drawing IC (control means)
51 Pointer image in a predetermined frame 510 Pointer image in the previous frame 52 Trajectory image

Claims (8)

A display panel capable of displaying a pointer image representing a rotating elongated pointer, and a locus image representing a movement locus of the pointer image;
Control means for controlling the display state of the display panel so that the pointer image of a plurality of frames and the trajectory image can be continuously switched and displayed;
Among the plurality of frames, the trajectory image in a predetermined frame includes the rotation position of the pointer image in the predetermined frame and the pointer image displayed in one or more frames before the predetermined frame. A display device provided between the position corresponding to the rotation position and formed as an image having the same shape as the pointer image.   The display device according to claim 1, wherein the one or more previous frames are a previous frame.   The display device according to claim 1, wherein a plurality of the trajectory images are formed in a direction in which the pointer image moves.   The display device according to claim 3, wherein the trajectory images are arranged at equal intervals in a direction in which the pointer image moves.   The trajectory image is arranged so that the adjacent intervals become sparser and denser from the rotation position of the pointer image displayed in the one or more previous frames toward the rotation position of the pointer image in the predetermined frame. The display device according to claim 3, wherein the display device is a display device.   The display device according to claim 1, wherein a color tone of the trajectory image is set to be the same as a color tone of the pointer image.   The color tone of the locus image is set based on the color tone of the pointer image, and the rotation position of the pointer image displayed in the one or more frames before the rotation position of the pointer image in the predetermined frame. 6. The method according to claim 1, wherein the setting is made so that the color becomes thinner, the color becomes transparent, or the color becomes black as the color goes toward. The display device described in 1.   The display device according to claim 1, wherein the pointer image indicates a rotation speed of a vehicle engine.

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