JP2019109571A - Display apparatus and input apparatus - Google Patents

Abstract

To provide a display apparatus and an input apparatus capable of accurately performing an input operation in a handwritten input by a remote control.SOLUTION: A display apparatus 1 is configured to include a display unit 10, an input unit 20 having a touch pad 22 that detects a touch position and acquires a position corresponding to the display unit 10 by a remote control and a load sensor 24 that acquires an operation load of the touch pad 22 when acquiring the position, and a control unit 30 having a display control unit 34 that controls display by changing a display mode to the display unit 10 on the basis of the operation load. With the operation load, a pushing force from a finger is detected, and a character input and a pointer display are separated by a strength and a timing of the pushing force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display device and an input device.

  Conventionally, a vehicle input device comprising a touch pad as a detecting means, a display unit for displaying handwritten characters inputted by the detecting means, and a character judging means for judging handwritten character input information inputted by the touch pad For example, Patent Document 1 discloses the disclosure.

  The touch pad in this vehicle input device is capable of blind operation. That is, the driver can operate each device by operating the input device blindly while viewing the operation menu displayed on the display unit. The driver's fingertip motion on the touch pad is detected based on the change in capacitance. Specifically, the contact position of the fingertip on the touch pad, and the fingertip locus when the fingertip is traced on the touch pad are detected. As a result, it is supposed that a vehicle input device capable of character input can be performed by displaying while displaying handwritten characters on the display unit by remote control with the touch pad.

JP, 2015-207167, A

  However, in the prior art, the input of the handwritten character is detected based on the touch position of the fingertip on the touch pad and the fingertip trajectory when tracing with the fingertip. If you try to input handwritten characters while displaying the input status on the touch pad on the display unit, for example, the start position of the first stroke of the character can not be aimed exactly, the start position of the second stroke is the first There is a problem that the start position of the stroke can not be accurately adjusted.

  Therefore, an object of the present invention is to provide a display device and an input device capable of performing accurate input operation in handwriting input by remote control.

[1] In order to achieve the above object, a display unit, a touch pad which detects a touch position and performs position acquisition corresponding to the display unit by remote control, and an operation load of the touch pad at the time of position acquisition And a control unit including a display control unit that performs display control by changing a display mode on the display unit based on the operation load. .
[2] The display control unit displays the touch position on the display unit as a pointer when the operation load is equal to or less than a first threshold, and displays the pointer when the operation load exceeds the first threshold. The display device according to [1], wherein the touch position is erased and displayed on the display unit may be used.
[3] Further, when the input control is performed on the display unit, the display control unit terminates the input display when the operation load becomes zero (touch off), the above-mentioned [1] or [2] It may be a display device described in.
[4] Further, when the input control is performed on the display unit, the display control unit ends the input display when the operation load is equal to or less than a second threshold smaller than the first threshold, It may be the display device according to 1] or [2].
[5] The input device according to any one of [1] to [4], wherein the control unit has an input control unit that performs input control of the touch position according to the display mode. May be
[6] Further, the control unit may be the input device according to the above-mentioned [5], including a character determination unit that performs handwritten character determination of characters input by the input control unit.

  According to the display device and the input device of the present invention, it is possible to enable accurate input operation in remotely operated handwriting input.

Fig.1 (a) is a whole block diagram of the display apparatus which concerns on embodiment of this invention, and an input device, FIG.1 (b) is the side view which looked at the input part in Fig.1 (a) from A direction. It is. FIG. 2 is an example showing the relationship between the operation time (flow of operation) and the operation load, and represents that from the point where the first threshold is exceeded to the point where the operation load becomes zero (touch off) is character input It is a related figure of operation time and operation load concerning a 1st embodiment. FIG. 3 (a) is a view of a pointer displayed on the character input display unit and a display unit for explaining the movement thereof, and FIG. 3 (b) is a touch pad for explaining the operation of the pointer shown in FIG. FIG. 3 (c) is a diagram of the input display displayed on the character input display unit and a display unit for explaining the start point and the end point of the first image and the second image, and FIG. 3 (d) is FIG. It is a figure of the touch pad explaining the touch position shown by and the positional relationship of character input. FIG. 4 is an example showing the relationship between the operation time (flow of operation) and the operation load, and represents that character input is from the point where the first threshold is exceeded to the point where the operation load becomes equal to or less than the second threshold. It is a related figure of operation time and operation load concerning a 2nd embodiment. FIGS. 5A and 5B show an example of one-stroke handwritten character input.

First Embodiment of the Present Invention
The display device 1 according to the embodiment of the present invention includes a display unit 10, a touch pad 22 that detects a touch position and performs position acquisition corresponding to the display unit 10 by remote control, and a touch pad 22 at the time of position acquisition. Control provided with an input unit 20 including a load sensor 24 which is a load detection unit for acquiring an operation load, and a display control unit 34 for performing display control by changing a display mode on the display unit 10 based on the operation load And a unit 30.

(Display unit 10)
As shown in FIG. 1A, for example, a menu screen is displayed on the display unit 10, and is remotely operated by the input unit 20, and icon selection, screen display change, input confirmation, input processing, etc. can be performed. The character input display unit 11 can display handwritten characters. For example, when the display unit 10 is mounted on a vehicle, the display unit 10 is mounted on an instrument panel of the vehicle. The display unit 10 is, for example, a known liquid crystal display such as a TFT (Thin Film Transistor) type. The display unit 10 is connected to the control unit 30, and display control is performed based on the display signal _SD output from the control unit 30.

  In the display unit 10, as shown in FIG. 1A, the upper left is set to world coordinates X and Y of the origin O, and the character input display unit 11 is set to local coordinates X 'and Y' of the origin O '. . The local coordinates X ′ and Y ′ of the character input display unit 11 correspond to the coordinates x and y of the touch pad 22 (input unit 20), and are scaled on the touch pad 22 by the absolute coordinate values converted. A point can be displayed on the character input display unit 11.

(Input unit 20)
As shown in FIGS. 1A and 1B, the input unit 20 includes a touch pad 22 and a load sensor 24 that detects an operation load on the touch pad 22. The touch pad 22 is disposed on the load sensor 24 mounted on the base 50. For example, in the case of a vehicle, the input unit 20 is mounted on a center console or the like as a base.

The touch pad 22 is, for example, a capacitive two-dimensional touch sensor capable of detecting two-dimensional coordinates corresponding to the display unit 10. The touch pad 22 detects a touch position by a finger or the like on the touch pad 22, and outputs the touch position signal _SP to the control unit 30.

The load sensor 24 is, for example, an electrostatic capacitance type or piezoelectric type load sensor. Load sensor 24, the operation load of the touch pad 22, the bottom of the touch pad 22 to pressure load, for example, detected as the average value of the load sensor located at the four corners, the control unit 30 so as operation load signal S _L Output to Note that at least one load sensor 24 may be provided.

(Control unit 30)
The control unit 30 is configured by, for example, a microcomputer including a storage unit 32, a display control unit 34, an input control unit 36, a character determination unit 38, and the like. The control unit 30 includes a central processing unit (CPU) that performs computations and processing on acquired data according to a stored program, a random access memory (RAM) that is a semiconductor memory, a read only memory (ROM), and the like. . In addition, as the control part 30 is shown to Fig.1 (a), the memory | storage part 32, the display control part 34 grade | etc., Do not need to be comprised integrally. For example, the storage unit 32 may use an external memory, and the display control unit 34 may use an external image processing chip.

The storage unit 32 stores a display device according to the present embodiment, a program for operating the input device, and a first threshold S _th1 and a second threshold S _th2 described later. In addition, character data (kanji, kana, kana, alphabet, symbols, etc.) are stored in advance in the storage unit 32 together with the character code, and the control unit 30 can be referred to as necessary.

The display control unit 34, a touch position signal S _P acquired from the touch pad 22, on the basis of the operation load S _L obtained from the load sensor 24, the processing of the microcomputer, using the calculation function, the display unit 10 Control the display by changing the display mode of. Here, whether to display control by changing the display mode, depending on the value of the operation load S _L, the position on the display unit 10 corresponding to the touch position signal S _P, to input display or perform pointer display To control. The pointer display is a mark indicating the position of an arrow or a cursor. Further, the input display is a point, a line, or the like that indicates the position where the position is actually input, and also includes a locus in which these points and the line are continuously displayed.

Specifically, as shown in FIG. 2, the display control unit 34, pointer display and a touch position on the display unit 10 when the operation load S _L is equal to or smaller than the first threshold value S _th1, the operation load S _L is the If the threshold value S _th1 is exceeded, the pointer display is erased and the touch position is input and displayed on the display unit 10.

In the first embodiment, the display control unit 34, when performing input on the display unit 10, when the operation load S _L is zero (touch-off), and ends the input display.

(Embodiment as an input device)
The control unit 30 described above is an input device having an input control unit 36 that performs input control of a touch position in accordance with the display mode described above, which is one of the embodiments of the present invention. Here, the input control of the touch position, the input control unit 36, the operation load S _L is (input to the control unit 30) acquires the touch position when exceeding a first threshold value S _th1 those. The acquired touch position forms, for example, handwritten characters. Character discrimination is performed in the character discrimination unit 38 for this handwritten character. The input device also includes a character determination unit 38 that determines handwritten characters of characters input by the input control unit 36.

  The input control unit 36 performs input control for acquiring the touch position that is input and displayed when the above-described input display is performed.

  The character discrimination unit 38 performs handwritten character discrimination of the characters input by the input control unit 36. The character discrimination unit 38 performs feature extraction and identification processing of handwritten characters of characters input by the input control unit 36 and character data (kanji, kana, kana, alphabet, symbols, etc.) stored in the storage unit 32. It performs handwritten character discrimination. As feature extraction, there are methods such as an extended cell feature method, a weighted direction histogram method, and an outline direction contribution feature method. Further, as the identification processing, there are a city block distance method, an Euclidean distance method, a linear identification function method, a subspace method, a KNN method, a Bayesian identification method, a method using a neural network, and the like. The control unit 30 according to the present embodiment refers to the character data (kanji, kana, kana, alphabet, symbols, etc.) of the storage unit 32 and the character code while referring to the character code and the handwritten character by the known feature extraction and identification processing method. Can be determined.

FIG. 2 is an example showing the relationship between the operation time (flow of operation) and the operation load, and from the point where the first threshold value S _th1 is exceeded to the point where the operation load becomes zero (touch off) is character input It is a related figure of operation time and operation load concerning a 1st embodiment showing a.

In operating time t _1, it starts touching the touch pad 22, to start the operation. Until the operation time t _2, the operation load S _L is equal to or lower than the first threshold value S _th1, the display control unit 34, the character input display unit 11 of the display unit 10, pointer display touch position on the display unit 10 Be done. That is, as shown in FIG. 3 (a), the pointer 100 is displayed between the point _{D 1} of the _{D 2.}

Since the operation load S _L exceeds the first threshold value S _th1 at the operation time t ₂ , the display control unit 34 erases the pointer display, and as shown in FIG. , Input display of touch position. Even if the operation load S _L falls below the first threshold value S _th1 , the input display is continued until the operation load S _L becomes zero (touch off).

In operating time t _3, by operation load S _L becomes zero (touch-off), the display control unit 34 stops the input display.

As shown in FIG. 2, the operation of t ₃ from the operation time t _2, the character input of the first stroke is. The input control unit 36 inputs the character input of the first image to the control unit 30.

Thereafter, the second and third strokes are input to the control unit 30 in the same manner. The display control unit 34 based on the operation load S _L, performs display control to change the display mode of the display unit 10. Further, the input control unit 36 can acquire the handwritten character “horse”, for example, as shown in FIG. 3C, by acquiring the position of the input display.

(Operation of display device and input device)
The operation of the display device and the input device will be described by the character input of "horse" as shown in FIGS. 3 (a) to 3 (d). FIG. 3 (b), the as shown in (d), touch a fingertip or the like _{P 1} point of the touch pad 22. The fingertip or the like is moved with an operation load S _L that does not exceed the first threshold value S _th1 up to the point P ₂ that is the first image. In response to this operation, as shown in FIG. 3 (a), the display control unit 34, the pointer 100 moves from point _{D 1} to _{D 2.}

To the point D ₂ and the first stroke of handwriting, an input operation as the operation load S _L exceeds the first threshold value S _th1. The display control unit 34, as shown in FIG. 3 (c), the input display point _{P 2} as a point _{D 2.} As shown in FIG. 3 (d), the moving the fingertip from point _{P 2} to the point _{P 3,} to touch-off at point _{P 3.} Thus, the first stroke of handwriting from point D ₂ is a point D _3, i.e., a vertical bar of the first stroke of the "horse" shown in FIG. 3 (c) is displayed. The first image is also input to the control unit 30 by the input control unit 36.

As shown in FIG. 3 (d), the is again touched touch-off finger over the point P _4. When the operation load S _L is equal to or less than the first threshold value S _th1 , the pointer 100 is displayed. Operator tracing on the touch pad 22 with a fingertip while observing the pointer 100 is moved to the start point P ₅ of the second stroke.

To the D ₅ point corresponding to the point P ₅ and the second stroke of handwriting, an input operation as the operation load S _L exceeds the first threshold value S _th1. The display control unit 34, as shown in FIG. 3 (c), the input display the points _{P 5.} As shown in FIG. 3 (d), the moving the fingertip from the point _{P 5} to the point _{P 6,} to touch-off at point _{P 6.} Thus, the second stroke from the point D ₅ of handwriting is point D _6, i.e., horizontal bar of the second stroke of "horse" shown in FIG. 3 (c) is displayed. According to the present embodiment, the start point of the first image and the start point of the second image can be made to coincide. The second image is also input to the control unit 30 by the input control unit 36.

  According to such a procedure, it is possible to input the start point and end point of the first image of the handwritten character, the start point and end point of the second image,. As a result, as shown in FIG. 3D, the display control unit 34 can input and display a beautiful handwritten character in which the start point and the end point of each image are at the target positions. Further, based on this display, the input control unit 36 can perform input control for acquiring handwritten characters that can be expected to have high discrimination accuracy, for example, the character of "horse" shown in FIG. 3 (c).

Second Embodiment
In the second embodiment, as shown in FIG. 4, the display control unit 34 switches the pointer display and the input display according to the first threshold value S _th1 and the second threshold value S _th2 to change the display mode. The other configuration is the same as that of the first embodiment, and different configurations and operations will be described below.

Specifically, as shown in FIG. 4, the display control unit 34, pointer display and a touch position on the display unit 10 when the operation load S _L is equal to or smaller than the first threshold value S _th1, the operation load S _L is the If the threshold value S _th1 is exceeded, the pointer display is erased and the touch position is input and displayed on the display unit 10.

In the second embodiment, the display control unit 34, when the operation load S _L becomes the second threshold value S _th2 below, it ends the input display.

  The input control unit 36 performs input control for acquiring the touch position that is input and displayed when the above-described input display is performed.

FIG. 4 is an example showing the relationship between the operation time (flow of operation) and the operation load, and from the point where the first threshold value S _th1 is exceeded to the point where the operation load becomes less than the second threshold value S _th2 It is a related view of operation time and operation load concerning a 2nd embodiment showing that it does.

In operation the time _{t 10,} and touch-on to touch pad 22, to start the operation. Until the operation time _{t 11,} the operation load _{S L} is equal to or lower than the first threshold value _{S th1,} the display control unit 34, the character input display unit 11 of the display unit 10, the touch position is pointer display. That is, the pointer 100 as shown in FIG. 3 is displayed.

In operation the time t _11, since the operation load S _L exceeds the first threshold value S _th1, the display control unit 34 erases the pointer display, the character input display unit 11, performs the input display of the touch position. Even if the operation load S _L falls below the first threshold value S _th1 , the input display is continued until it becomes equal to or less than the second threshold value S _th2 .

As shown in FIG. 4, when the operation load S _L becomes equal to or less than the second threshold value S _th2 , the touch position is displayed on the display unit 10 as a pointer.

As shown in FIG. 4, since hysteresis is given by the first threshold value S _th1 and the second threshold value S _th2 , even if the operation load S _L fluctuates with the first threshold value S _th1 as a boundary, pointer display Input display does not change complicatedly.

Thereafter, by the same procedure, the display control unit 34, pointer display between operating time _t 12 _{~t 13,} input display between operating time _t 13 _{~t 14,} based on ..., the operation load , Change the display mode on the display unit 10 to perform display control.

  Further, when the above-mentioned input display is performed, the input control unit 36 acquires the input and displayed touch position (input to the control unit 30).

In the second embodiment, as described above, since the hysteresis is given by the first threshold value S _th1 and the second threshold value S _th2 , it also corresponds to so-called single-stroke character input. It becomes possible.

FIGS. 5A and 5B show an example of one-stroke handwritten character input. As shown in FIG. 5 (b), on the touch pad 22, from the point Q ₁ to the point Q _2, kept in contact with the fingertip, for example, a manner of single stroke, it is possible to enter the character "three" .

The display control unit 34 inputs and displays a portion where the operation load S _L exceeds the first threshold value S _th1 , and makes the pointer display when it becomes equal to or less than the second threshold value S _th2 . For example, while touching the portion of three horizontal bars of the letter "3" with a large load, the operator traces on the touch pad 22 and keeps touching from the end point of each drawing to the start point of the next drawing with a small load If the user follows the touch pad 22, the display control unit 34 can input and display the character “three” as shown in FIG. 5A on the character input display unit 11 of the display unit 10.

  Further, the input control unit 36 can perform input control for acquiring handwritten characters that can be expected to have high discrimination accuracy, for example, the character “3” shown in FIG. 5A.

(Effect of the embodiment)
According to the embodiment of the present invention, the following effects are obtained.
(1) The display device 1 according to the embodiment of the present invention includes the display unit 10, the touch pad 22 for detecting the touch position and performing position acquisition corresponding to the display unit 10 by remote control, and touch at the time of position acquisition. An input unit 20 including a load sensor 24 for acquiring an operation load of the pad 22, and a control unit 30 including a display control unit 34 for changing the display mode on the display unit 10 based on the operation load and performing display control And are configured. As a result, the pressing force from the finger is detected by the operation load, and it becomes possible to separate the character input and the pointer display by the strength and timing of the pressing force.
(2) Since the character input and the pointer display can be separated, for example, it becomes easy to position the start point and the end point of each image of the handwritten character according to the aim at the handwriting input. Input operation is possible. As a result, the input accuracy of handwritten characters is improved, and the accuracy of character discrimination and character identification at the time of handwritten character input is improved.
(3) By providing hysteresis by the first threshold value S _th1 and the second threshold value S _th2 , it becomes possible to cope with character input of a plurality of strokes such as so-called single stroke writing. This enables character input of a plurality of pictures while touching the touch pad.

  Although some embodiments of the present invention have been described above, these embodiments are merely examples and do not limit the invention according to the claims. Moreover, these novel embodiments can be implemented in other various forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. Further, not all combinations of the features described in the embodiments are essential to the means for solving the problems of the invention. Furthermore, these embodiments are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 10 ... Display part, 11 ... Character input display part, 20 ... Input part, 22 ... Touch pad, 24 ... Load sensor, 30 ... Control part, 32 ... Storage part, 34 ... Display control part, 36 ... input control unit, 38 ... character determination unit, 50 ... base, 100 ... pointer, S D _... display signal, S L _... operation load signal, S P _... touch position signal, _{S th1 ...} first threshold _{value, S th2} ...... first 2 threshold, X, Y: world coordinates, X ', Y' local coordinates ..., x, y: coordinates of touch pad 22

Claims (6)

A display unit,
A touch pad for detecting a touch position and performing position acquisition corresponding to the display unit by remote control; and an input unit including a load detection unit for acquiring an operation load of the touch pad at the time of position acquisition;
A control unit including a display control unit that changes the display mode on the display unit and performs display control based on the operation load.
A display device having   The display control unit displays the touch position on the display unit as a pointer when the operation load is equal to or less than a first threshold, and erases the pointer display when the operation load exceeds the first threshold. The display device according to claim 1, wherein the touch position is input and displayed on the display unit.   The display device according to claim 1, wherein the display control unit ends the input display when the operation load is zero (touch off) when the input display is performed on the display unit.   The display control unit according to claim 1 or 2, wherein the input control is ended when the operation load is equal to or less than a second threshold smaller than the first threshold when the input display is performed on the display unit. Display device.   The input device according to any one of claims 1 to 4, wherein the control unit includes an input control unit that performs input control of the touch position according to the display mode.   The input device according to claim 5, wherein the control unit includes a character determination unit configured to determine handwritten characters of characters input by the input control unit.

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