JP3183253U - Touch display device - Google Patents

Abstract

A touch in which electrode lines provided on a touch panel are obliquely laid so as to avoid a color shift of a screen which finally occurs by making mask levels of sub-pixels of different colors on each pixel close to each other. A display device is provided.
A touch display device displays a screen with a plurality of pixels, and each single pixel includes a red subpixel R, a green subpixel G, and a blue subpixel B, and at least one of the pixels. And a touch panel including a transparent substrate provided with a plurality of electrode lines 301 laid substantially along the diagonal line.
[Selection] Figure 3A

Description

  The present invention relates to a touch display device, and more particularly to a touch display device using a transparent substrate provided with an electrode line covering each subpixel in each pixel.

  A touch module generally applied in a touch display is a circuit board that provides touch event detection provided on a display, and is usually designed as a transparent board, and an electrode made of a conductive material is laid on the transparent board. Thus, a circuit for detecting a touch event in the touch display is formed. There are various types of electrodes. Among them, the conductive material forming the electrodes may be a metal line having a certain width, and the signals in the two directions X and Y of the touch event in the touch module are obtained by the intersecting design. And the purpose of touch operation is achieved by combining corresponding software.

  The schematic diagram shown in FIG. 1 can be referred to for the structure of the related prior art touch display device.

  In the main structure of the touch display device shown in the figure, the panel 10 is formed by the touch substrate 103 and the column electrode lines 101 and the row electrode lines 102 formed on the upper and lower surfaces thereof. The The panel 10 has an upper lid 105 coupled to the upper side via a binder 104 and a display panel 107 coupled to the lower side via a binder 106.

  Here, the material of the touch substrate 103 is glass, plastic, a mixed material of glass / plastic, or the like. The column electrode lines 101 and the row electrode lines 102 formed above and below are laid along the X direction and the Y direction, respectively. An electric field is formed by the electrostatic capacitance effect generated when the user's finger touches the touch panel, and the touched position can be accurately determined by the crossed electrode lines 101 and 102.

  For the conventional electrode type, the capacitive touch panel in the prior art shown in FIG. 2A can be referred to. The electrode arrangement of the capacitive touch panel shown in the figure includes a column electrode line 203 and a row electrode line 204. Here, the intersecting point is located at each pixel 20 of the display. Therefore, the pixel corresponding to the touched position can be determined. A stray capacitance 201 exists at the position of the pixel 20 at the intersection of the column electrode line 203 and the row electrode line 204.

  In this capacitive touch panel, the stray capacitance 201 between the column electrode line 203 and the row electrode line 204 becomes a signal capacitance 202 that can detect an electric field change by a passing current, or touching the panel. The column electrode line associated with the signal capacitance 202 because it uses the change in the signal capacitance 202 caused by a change in the electric field in the vicinity of the capacitance, i.e., finger, palm or other body part or object. It is possible to detect the touched position via the 203 and the row electrode line 204.

  FIG. 2B is a relationship diagram of electrode lines and pixels according to the prior art. In the same figure, pixels arranged in order in the display panel are shown. Each pixel consists of a sub-pixel of a different color, of which one technique is R (red sub-pixel), G (green sub-pixel) and B (blue sub-pixel) as shown in the figure. Is a single pixel. The figure further shows column electrode lines 203 'and row electrode lines 204' intersecting on each pixel. It should be noted that the intersection point of the column electrode line 203 'and the row electrode line 204' substantially covers the center of each pixel.

  Next, FIG. 2C is a schematic diagram showing the prior art of each pixel and electrode line. In the figure, one pixel 20 is enlarged and displayed, and a single pixel 20 composed of R (red subpixel), G (green subpixel), and B (blue subpixel) is schematically shown. In this example, the intersection point of the column electrode line 203 ″ and the row electrode line 204 ″ laid on the touch panel is located on the central green subpixel.

  As shown in FIG. 2B or 2C, the arrangement of the electrode lines in the prior art touch panel is usually designed to be laid in the vertical and horizontal directions, and the intersection point corresponds to the center of each pixel as much as possible. Designed to. As shown in FIG. 2C, when the intersection point is located at the center sub-pixel of the three sub-pixels, an electrode line having a certain width often causes a masking effect, and the luminance that each sub-pixel should have In addition, the masking effect of each sub-pixel in each pixel does not match, and there is a problem that the color is uneven among the sub-pixels of different colors in the pixel, which may eventually cause a color shift phenomenon on the screen. There is.

  For example, in a sensor electrode that is designed horizontally and vertically on a touch panel, only one subpixel of each pixel is masked and the other subpixels are not masked, thereby making the color of each pixel non-uniform. The display quality may be adversely affected.

  In addition to the color misregistration problem caused by the different masking effects between the sub-pixels mentioned above, the accuracy of assembly between the touch panel and the display panel is generally due to tolerances caused by the display assembly process. However, the situation where the sensor electrode corresponds to each pixel is inconsistent, and there is a problem in that the color of each pixel is inconsistent. There is a possibility that a larger color misregistration problem may be caused by combining the two front and rear defects.

  The present invention aims at effectively avoiding the problem of color misregistration of the screen that finally occurs by making the mask levels of sub-pixels of different colors on each pixel close to each other. It is an object of the present invention to provide a touch display device whose main feature is that the electrode lines provided on the substrate are laid obliquely.

  According to an embodiment, a touch display device according to the present invention mainly includes a display panel that displays a screen with a plurality of pixels, and each single pixel is composed of a plurality of sub-pixels of different colors. The sub-pixels of different colors are, for example, a red sub-pixel, a green sub-pixel and a blue sub-pixel, but do not exclude the possibility of being other sub-pixels of white, black or other tones, for example.

The touch display device according to the present invention further includes a touch panel including at least a transparent substrate provided with a plurality of electrode lines laid substantially along a diagonal line of at least one pixel.

  According to another embodiment, the touch display device according to the present invention may further include another transparent substrate on which other electrodes are laid in a direction different from the plurality of electrode lines on the transparent substrate. .

  According to another embodiment, one or more electrode lines are further laid between the plurality of electrode lines on the transparent substrate, and the adjacent electrode lines are separated by a width of about one subpixel in the horizontal direction. ing.

  The touch display device according to the present invention is mainly characterized in that each electrode line is laid in particular along a diagonal line of each pixel. With this electrode line, each of the subpixels R, G, and B has the same mask level, and the problem of image color misregistration can be effectively avoided.

It is a schematic diagram which shows the structure of the touch display apparatus of a prior art. It is a schematic diagram which shows the electrostatic capacitance type touch panel of a prior art. It is a related figure of the electrode line of a prior art, and a pixel. It is a schematic diagram which shows the prior art of each pixel and an electrode line. It is a 1st schematic diagram which shows the Example of the electrode which concerns on this invention. It is a 2nd schematic diagram which shows the Example of the electrode which concerns on this invention. It is the 3rd schematic diagram which shows the Example of the electrode which concerns on this invention. It is a schematic diagram which shows the Example based on the coupling | bonding of the electrode and display panel of this invention. It is a 4th schematic diagram which shows the Example of the electrode which concerns on this invention. It is a 1st schematic diagram which shows the Example of the touch display apparatus which concerns on this invention. It is a 2nd schematic diagram which shows the Example of the touch display apparatus which concerns on this invention.

  From the viewpoint of the electrode line arrangement designed on the touch panel of the prior art, the electrode arrangement is usually laid in the vertical and horizontal directions or designed based on specific demand. In the design of the intersection points of the electrode lines in each direction, the intersection points are arranged so as to correspond to the center of each pixel as much as possible. For example, in the conventional technique shown in FIG. 2C, the intersection point is a subpixel at the center position of three subpixels. Located on the top. Accordingly, a masking effect is often formed on each pixel by an electrode line having a certain width, and a certain subpixel is masked, resulting in a mask with a certain level of brightness. Therefore, in order to avoid the problem of color non-uniformity between different colors in pixels with such a design, the present invention provides a touch display device employing an improved electrode arrangement.

  For one embodiment, the schematic diagram of the electrode according to the present invention shown in FIG. 3A can be referred to. According to the technical features of the present invention, as schematically shown in the figure, the pixel 30 is composed of sub-pixels of different colors, a red sub-pixel (R), a green sub-pixel (G), and a blue sub-pixel (B ). However, in practical applications, the color of the subpixel is not limited to this example, and does not exclude the inclusion of subpixels that produce black, white or other tones. For example, the design may include a sub-pixel that generates RGBW (white, white). The red subpixel, the green subpixel, and the blue subpixel, which are the single pixels shown in the drawings, are sequentially generated through the color filter by the backlight module provided in the display panel.

  The red subpixel (R), the green subpixel (G), and the blue subpixel (B) shown in this example are arranged in order to form one single pixel 30. According to an embodiment of the present invention, the electrode line 301 provided on the touch panel is a uniaxial electrode design and is laid substantially along the diagonal line of the pixel 30. As shown in the figure, the direction of the electrode line 301 and the horizontal direction have an angle θ.

  According to a preferred embodiment, when the areas occupied by the three sub-pixels described above coincide, the included angle between the electrode line 301 and the horizontal direction is achieved in order to achieve the purpose of laying substantially along the diagonal line of the pixel 30. θ is between 18.435 ° and 71.565 °, and the electrode wire 301 is a thin metal wire having a line width of 1 μm to 10 μm. In order to avoid a large difference in the area where the electrode line 301 covers different subpixels, the electrode line 301 according to the present invention can occupy a close area ratio in each of the subpixels R, G, and B. The problem of excessive color misregistration does not occur on the screen generated by.

  FIG. 3B is a schematic diagram showing an example of an electrode in another direction. In this example as well, the electrode line 302 is designed by the design of a uniaxial electrode that passes over the pixel 30, and the direction of the electrode line 302 and the horizontal direction have an angle θ ′.

  Similarly, due to the electrode arrangement along the diagonal line of the pixel 30, the electrode line 302 provided on the touch panel can be covered with a close area ratio in each of the subpixels R, G, and B, and the color misregistration phenomenon of the image that occurs finally. Can be effectively avoided.

FIG. 4 is a schematic view showing another embodiment of the electrode according to the present invention. In this example, two electrode lines 401 and 402 are laid in a biaxial electrode design in directions intersecting each other. The electrode lines 401 and 402 of this biaxial design are laid at angles θ ₁ and θ ₂ with respect to the arrangement direction of pixels 40 (horizontal direction in the figure), respectively. θ ₁ and θ ₂ may be designed as the same, close or different angles.

  According to the main technical means of the present invention, the electrode lines 401 and 402 in these two directions can be laid substantially along the diagonal line of the pixel 40 when covering the pixel 40, respectively. The purpose is also to bring the mask levels on each subpixel in pixel 40 close together.

  FIG. 5 is a schematic view showing an embodiment based on the combination of the electrode and the display panel of the present invention.

  In the figure, a display panel 5 is shown. A plurality of pixels 50 are formed thereabove. A single pixel consists of a plurality of different color sub-pixels. The main configuration of the sub-pixels is the red sub-pixel (R), the green sub-pixel (G), and the blue sub-pixel (B) shown in the figure. Do not exclude. The backlight module provided in the display panel 5 may be various types of backlight light sources such as a cold cathode fluorescent lamp (CCFL) and a light emitting diode (LED). White light emitted from the backlight light source generates light of various colors via a color filter on the backlight module. Accordingly, different color sub-pixels in each pixel are sequentially generated.

  In this example, the display panel 5 is provided with a plurality of electrode lines 501 laid on a transparent substrate (not shown). Each electrode line 501 is laid approximately along the diagonal of a single pixel on an individual pixel.

  FIG. 6 shows another embodiment of the electrode arrangement according to the present invention.

  In this example, an electrode line 600 passing through a diagonal line on the single pixel 60 described in the above-described embodiment is provided above one pixel 60, and another one is also provided between the electrode lines 600. Alternatively, a plurality of electrode wires 601 are provided. Two electrode lines 600 and 601 adjacent to each other on these transparent substrates are separated by a width W of one subpixel in the horizontal direction.

  The embodiment shown in FIG. 6 can still achieve the purpose of the electrode lines of the present invention occupying a close area ratio on each subpixel in each pixel. It is clear that the plurality of electrode lines 600, 601 have an area corresponding to the number matched when covering each sub-pixel, and still avoid the problem of color misregistration caused by non-uniform masks. Can do.

  For the touch panel display device with the electrode arrangement in each embodiment described above, the schematic diagram of the embodiment shown in FIG. 7 can be referred to.

  The display panel 70 shown in the figure may generally be a liquid crystal display panel (LCD), a plasma display panel (PDP), or an organic light emitting diode display panel (OLED). Above this, a plurality of pixels formed of sub-pixels of various colors are formed. In this example, the red sub-pixel (R), the green sub-pixel (G), and the blue sub-pixel (B) are not limited to them in actual implementation.

  The touch panel coupled to the display panel 70 so as to overlap vertically includes a transparent substrate 72. The material of the transparent substrate 72 is generally glass, plastic, a mixed material of glass / plastic (for example, PET, PMMA) or the like. In addition, about the coupling | bonding method for couple | bonding a touch panel and a display panel, it is not limited to a specific binder and adhesive agent, if a touch panel and the display panel 70 can be couple | bonded, well-known binder, adhesive agent In addition, any mechanical coupling method obvious to those skilled in the art can be employed. The electrodes (for example, electrode lines 721) on the transparent substrate 72 are manufactured by etching, printing, deposition, or other manufacturing processes capable of forming metal lines or the like on the substrate. be able to.

  The electrode line 721 is laid obliquely on the transparent substrate 72 so as to have a certain angle. On the transparent substrate 72, electrodes are mainly arranged in addition to the flexible control or drive circuit. The electrode line 721 described in the embodiment is preferably laid along a diagonal line of at least one pixel on the display panel 70 as an actual design feature. The material of the electrode line 721 for general touch detection may be a transparent conductor such as ITO (indium tin oxide), but the present invention is not a non-transparent metal conductor such as copper, aluminum, gold, or silver. This also applies to transparent conductors.

  The touch display device shown in FIG. 8 is a schematic view of still another embodiment of the present invention. The display panel 80 shown in the figure is coupled to the touch panel so as to overlap vertically. The touch panel includes two transparent substrates, a first transparent substrate 81 and a second transparent substrate 82. Electrode lines 811 and 821 are provided on the respective transparent substrates.

  In this example, the plurality of electrode lines 811 on the first transparent substrate 81 are laid at a specific angle, and are determined based on the arrangement of each pixel on the display panel 80 in particular. Preferably, it is laid along the diagonal direction of at least one pixel.

  The touch panel further includes a second transparent substrate 82. On the second transparent substrate 82, electrode lines 821 in a direction different from the plurality of electrode lines 811 on the first transparent substrate 81 are laid.

  In another embodiment (not shown), unlike the above-described two first transparent substrates 81 and 82, the electrode lines 811 and 821 are formed on both side surfaces of one transparent substrate, respectively. The plurality of electrode lines 811 and 821 on both sides or on both sides are along the diagonal line of at least one pixel, but are laid in different directions.

Based on the embodiment of the manufacturing process for manufacturing the electrode lines, the sensor electrode with such a biaxial arrangement may have a line width of 1 μm to 10 μm, and is installed on both sides of one transparent substrate, or Each is installed on two transparent substrates. The included angle θ ₁ between the direction of the electrode line and the horizontal direction is between 18.435 degrees and 71.565 degrees, and θ ₂ is between 18.435 degrees and 71.565 degrees. 3A, 3B, and 4 can be referred to for the angle display described above.

  As described above, the touch display device according to the present invention is mainly characterized in that each electrode line is laid in particular along a diagonal line of each pixel. With this electrode line, each of the subpixels R, G, and B has the same mask level, and the problem of image color misregistration can be effectively avoided.

  The above are only preferred embodiments of the present invention and do not limit the scope of the present invention. Accordingly, all equivalent structural changes utilizing the contents of the specification and drawings of the present invention are included in the scope of the present invention.

10 Panel 101 Column electrode line 102 Row electrode line 103 Touch substrate 104, 106 Binder 105 Lid 107 Display panel 20 Pixel 201 Floating capacitance 202 Signal capacitance 203, 203 ′, 203 ″ Column electrode line 204, 204 ′, 204 ′ 'Row electrode line 30 pixel 301, 302 electrode line 40 pixel 401, 402 electrode line 5 display panel 50 pixel 501 electrode line 60 pixel 600, 601 electrode line 70 display panel 72 transparent substrate 721 electrode line 80 display panel 81 first transparent Substrate 82 Second transparent substrate 811, 821 Electrode line R, G, B Subpixel W Width θ, θ ′, θ ₁ , θ ₂ angle

Claims (7)

A display panel that displays a screen with multiple pixels, each single pixel consisting of multiple sub-pixels of different colors,
A touch panel including at least a transparent substrate coupled with the display panel so as to overlap vertically and provided with a plurality of electrode lines laid substantially along diagonal lines of at least one of the pixels;
A touch display device comprising:   The touch display device according to claim 1, wherein the plurality of sub-pixels of the single pixel include at least a red sub-pixel, a green sub-pixel, and a blue sub-pixel.   The touch display device according to claim 1, wherein an angle θ between the electrode line and the horizontal direction is between 18.435 degrees and 71.565 degrees.   One or more electrode lines are further provided between the plurality of electrode lines on the transparent substrate, and two adjacent electrode lines are separated from each other by the width of one subpixel in the horizontal direction. The touch display device according to claim 1, wherein the touch display device is a touch display device.   The touch display device according to claim 1, wherein the electrode line is a non-transparent metal line.   The touch display device according to claim 5, wherein a line width of the metal line is between 1 μm and 10 μm.   The touch display device according to claim 1, wherein the display panel is a liquid crystal display panel, a plasma display panel, or an organic light emitting diode display panel.