TWI236560B - Penetrable substrate and liquid crystal display - Google Patents

Abstract

A liquid crystal display includes a reflective plate, a liquid crystal panel, a penetrable substrate, a concave structure, and a touch screen. The reflective plate is used for reflecting a light. The liquid display panel has a first surface on which the reflective plate is mounted and a second surface. The penetrable substrate is used for reflecting and refracting the light. The penetrable plate has a connecting surface and a first side. The connecting surface is disposed on the second surface. A light-emitting diode (LED) is mounted on the first side to provide the light. The concave structure is disposed on a second surface relatively to the first surface for reflecting the light. The touch screen having a touch-detecting circuit is relative to the connecting surface. According to the touch received by touch screen, the touch-detecting circuit is used for executing the corresponding action.

Description

1236560 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device with a touch panel. [Prior technology] Personal digital assistant (PDA) is a new product field that has been emerging in recent years. This product is a smart personal information processor that integrates 3 C application functions. It is mainly positioned for highly mobile professionals or individuals. It can easily obtain and process personal information anytime, anywhere. Because it is designed to be easy to carry, it is required to be as thin, light and short as possible for the size of the PDA. Furthermore, most pDAs use reflective LCDs. The main reason is that anti-LCDs do not require a backlight source. They can achieve the purpose of display by the reflection of incident light. Therefore, their power consumption is lower, their appearance is thinner, Lighter weight. [Summary of the Invention] The LCD screen of a general PDA will now be described. Refer to figure 丨, figure i is a schematic cross-sectional view showing a conventional liquid crystal display device with a touch panel, where 0 is a reflective liquid crystal display screen. Its structure is as follows: a reflecting plate u is located at the bottom of the LCD display screen, and has a reflecting surface 11A on the upper surface of the reflecting plate u to reflect the light provided by the external environment. The reflective surface 11A provided on the reflective plate is a liquid crystal display panel 12, which is filled with many liquid crystal molecules and semiconductor elements (not shown), such as a thin film transistor, a resistor, or a capacitor, to enable the liquid crystal display. Not panel 12. By changing the arrangement of the liquid crystal molecules by applying a bias voltage, the light transmittance of the liquid crystal display panel 12 can be adjusted to achieve a display effect. Next, the structure of the light guide plate 13 will be described. Referring to FIG. 2A and FIG. 2B, FIG. 2A shows a side view of the light guide plate 13, and FIG. 2B shows the light guide plate 13 6 1236560. As shown in FIG. 2B, the top surface i3A of the light guide plate 13 has a plurality of figures. The above pattern 131 is composed of an ink of a special material f and has a surface of coarse sugar particles facing the surface. The inside of the light guide plate Η can make the light distribution inside the light guide plate 13 more uniform, thereby using the uniformity of the light in the south. In addition, as shown in FIG. 2A, the pattern 13m is distributed on the top of the light guide U = 38, and the reference numeral 132 represents the light inside the light guide plate 13 and its direction is indicated by an arrow. When the light Π2 inside the light guide plate 13 is reflected to ㈣i3i, the reflection direction of the light is more diversified because of the complex structure of the surface of the pattern 13i. The reason is that it increases the chance of light entering the liquid crystal display panel 12, and allows the light to form a beam, thereby ^ Efficiency of light transmission. In addition, when #light is reflected by the reflective plate u and enters the light guide plate 13 through the liquid crystal display panel 12 and the incident angle of the traveling route to the top surface μ is greater than a specific angle, the professional line will be reflected by the top surface M = As shown in Figure 3; if the line of light is smaller than the specified angle for the person uA on the top surface ^ and day :, the light will pass through the top surface 13A and leave the light guide plate 13, as indicated by the label ... Determine the difference in the β degree between the material of the light guide plate 13 and its external medium. -Generally speaking, 'the medium density of the light guide plate 13 is greater than the medium density of its external environment' If the medium density of the light guide plate 13 is greater than the medium degree of its external environment, the higher the degree, the smaller the closing angle, otherwise, if the light guide plate The lower the degree of the medium of 13 is greater than the medium density of its external environment, the larger the specific angle is. In addition, the above-mentioned pattern 131 can be replaced by the convex member 135 of FIG. 2C. "The long light f is better and the light efficiency is more south. However, it is suitable for the light guide plate of the acrylic material. The material of the right light plate is glass. The above-mentioned convex member ⑴ is applicable, but the above-mentioned pattern 131 can be used. The touch-sensitive panel 14 has a plurality of circuit elements to perform input measurement and coordinate judgment, and its circuit 1 uses a technique of /, /, and convenience. Related, the following outlines the touch surface

TW2316 (050325) CRF 1236560: The technology used is so large that it can be divided into resistive, capacitive, or wave type. Both infrared and ultrasonic are installed on the side of the panel—2 side of the panel = the opposite side is installed with a receiver (Reeeiver). When the screen is touched, the external line or the ultrasonic wave can be measured. And get the bit:: When the resistive touchpad is arranged in parallel with transparent electrodes two = up, the electrodes are connected to the resistance, the two upper and lower layers are kept at a vertical distance to keep the distance, and when the panel is touched, it is away from ° % Is the capacitance change caused by the electrostatic electrode between the transparent electrodes arranged in Hunan and the human body 'to detect its seatpost from the induced current generated. ,,,. Hibiscus, 卩 f The outline of the traditional LCD with n-type hard panel is ancient, the materials of the v-plate 13 and the touch panel 14 are transparent materials, such as acrylic or glass, and both have -definite The thickness of the device is more directly related to the thickness of the device. For example, the size of the device, such as the light guide plate and the touch surface, is about 1.5 cm to 3 cm. Therefore, if the two structures can be integrated together, the thickness of the conventional liquid crystal display device can be effectively reduced. Furthermore, reflective LCDs can only be displayed by an external light source, which limits the operating environment of pDAs made of traditional liquid crystal display devices. In view of this, in order to solve the above problems, the main object of the present invention is to provide a liquid crystal display device with a touch panel, which integrates a touch panel and a light guide plate in a conventional liquid crystal display device with a touch panel. It is a single-structure. In this single-structure, it has the functions of a touch panel and a light guide plate, so the thickness of the liquid crystal display device can be reduced. Furthermore, another object of the present invention is to provide a reflective liquid crystal display device with an internal light source and a touch panel, so that the reflective liquid crystal display device according to the present invention can still be used in the absence of an external light source. Solve the problem that the traditional reflective LCD display must be used in an environment with a light source to have a display effect.

TW2316 (050325) CRF 8 1236560 Problem 1 The light source used in the present invention is to replace the traditional cold with a light-emitting diode: ° Cathode Fluorescent Lamp, the reason is that when the light-emitting diode emits light The required power is lower than that of a cold cathode light emitting tube. In this way, the liquid crystal display device can be used in an environment without a light source, and the requirements of power saving can be taken into account. In order to achieve the above-mentioned object, the present invention provides a liquid crystal display device including: a reflective sheet for reflecting a predetermined light; a liquid crystal display panel having a first-setting surface and a second-setting surface disposed on the reflective sheet --- a light-transmitting plate for refracting or reflecting the above-mentioned predetermined light, the light-transmitting plate has a joint surface, is disposed on the first and second facing surfaces, and has a touch receiving surface with respect to the joint mask, and the touch The receiving mask has a contact detection circuit for performing corresponding actions according to external contact. Furthermore, the present invention proposes a liquid crystal display device, including: a reflective sheet for reflecting a predetermined light; a liquid crystal display panel having a δth and a second surface disposed on the reflective sheet; a transparent surface; A light plate for refracting or reflecting the above-mentioned predetermined light, the above-mentioned light-transmitting plate having a joint surface provided on the above-mentioned second setting surface, and a -side-side "for setting a light-emitting diode to provide the above-mentioned predetermined light, The bending portion is disposed on a second side opposite to the first side to reflect the predetermined light and has a touch receiving surface with respect to the bonding mask. The touch receiving mask has a contact detection circuit for Perform corresponding actions based on external contact. "Furthermore, as mentioned above, since the liquid crystal display device according to the present invention is a reflective type, it requires a separate light source to perform the function of displaying normally, but it can choose a light source that supplies light according to the needs of the global environment. The external environment can provide enough light for the display of the liquid crystal display device according to the present invention, then use an external light source directly to reduce power consumption. If the external environment cannot provide enough TW2316 (050325) CRF 9 1236560, According to the liquid crystal display iridium and Qiu Xifeng developed by Ben Qiming, Feng Xia's "Summer Xia Song is not used 'will automatically cause the moon to be the source of its neighbours, so that the LCD display device can go away and protect the elders. It is called _ t J to stop hanging to perform the display function. Furthermore, the internal light source used by the liquid crystal display Digongyu-Tiaodiaoshan according to the present invention is Mao Xian pole, due to the light emitting diode It is necessary to reduce the consumption of electricity when the body is emitting light. Therefore, the car is low. [Embodiment] The first embodiment: The liquid crystal display device according to the first embodiment of the present invention will be described below. The liquid crystal display device described in the embodiments of the present invention is a reflective liquid crystal display, so an external light source is required to perform the display function. However, the liquid crystal display device described in the embodiment of the present invention also provides an additional _ _Internal light source to reduce the use of ambient light sources to limit the use of reflective liquid crystal display devices. Refer to Figure 3 '3rd ® is a side sectional view showing a liquid crystal display device according to the first embodiment of the present invention. As shown in Figure 3 As shown in the figure, the liquid crystal display device according to the first embodiment of the present invention has a reflective sheet 31 for reflecting light inside the liquid crystal display device. A liquid crystal display panel 32 is formed on the reflective sheet 31 and has a first The setting surface 32A and the second setting surface 32B are structured as a liquid crystal display panel generally known at present, and will not be repeated here to avoid obscuring the features of the present invention. In addition, the light transmitting plate 33 is formed on the liquid crystal display panel 32. For the structure of the light-transmitting plate 33, please refer to FIG. 4A and FIG. 4B. FIG. 4A shows the light transmission of the liquid crystal display device according to the first embodiment of the present invention. A top view of 33. FIG. 4B is a side cross-sectional view of the light transmitting plate 33 of FIG. 4A. According to the first embodiment of the present invention, the light transmitting plate 33 is used to refract and reflect external light sources or internal light sources. The light can be made of glass. The joint surface 331 is set on the second setting surface 32B of the liquid crystal display panel 32. Referring to FIG. 4A, a touch is provided on the upper surface of the light transmitting plate 33 of TW2316 (050325) CRF 10 1236560. The receiving surface 33〇 has a contact debt measuring circuit 33A for performing corresponding actions according to external contact, and its internal circuit structure is different from each other according to the sensing method of the touch receiving surface 330, such as a resistive type, Capacitive type, infrared type, ultrasonic type, etc., but this is well known to those skilled in the art, and will not be repeated here to simplify the description. Furthermore, a light source, such as a plurality of light-emitting diodes 333, is additionally provided on the side surface 332 of the light-transmitting plate M to provide the above-mentioned internal light source. Still refer to FIG. 4A and FIG. 4B. In addition, it is opposite to the side 332. The other side 336 is provided with a curved reflecting portion 335, which is mainly used to reflect the light emitted by the light emitting diode 333 to avoid light Dissipating to the external environment increases the demand for light φ line intensity. It is particularly noted that the above-mentioned light-emitting diode 333 is not limited to being disposed on the side surface 332, and the designer may place the light-emitting diode 333 on the other side of the light-transmitting plate 33 according to the actual situation, and oppositely set the above-mentioned bending reflector 335 to improve the display effect. In addition, the touch receiving surface 330 further has a plurality of patterns 33B. The plurality of patterns 33B are made of ink, and the surface of the touch receiving surface 330 has a plurality of particles, which can change the reflection of light inside the light transmitting plate 33. Direction to improve the efficiency of light utilization. The principle of its configuration is as follows: the pattern 33B located near the touch receiving surface 33 distance away from the driver of the light-polarity 333, the area is small, and the distance between the patterns is large, otherwise, the distance from the light-emitting diode 333 is more The far pattern 33B has a large area and a small interval between the patterns. The reason is that the farther from the light source, the light's brightness is weaker, so a larger area and a denser pattern are needed to increase the reflected light. Similarly, the closer to the light source, the lighter the brightness is Strong, so only a small area and a sparse pattern are needed to reduce the amount of reflected light, so that the amount of light reflected to the liquid crystal display panel 32 is not affected by distance. Regarding the arrangement of the above patterns, the area and distance of the patterns can be adjusted appropriately according to the actual situation. TW23 16 (050325) CRF 11 1236560 In addition, according to the first embodiment of the present invention, an external light source _ road training can be set on the touch receiving surface. The brightness of the light source can be provided by an external source. When the brightness of the light is lower than a specific brightness, the light from the internal light source is provided outside the light-emitting diode t to enhance the display effect, and the definition of the specific brightness may be to achieve a brightness sufficient for the human eye to clearly identify the display of the liquid crystal display device. . In this way, the light-emitting diode 333 does not need to be maintained in the light-emitting state from time to time, and can only emit light when the external light source is insufficient, which makes the use of power more flexible. The operation principle of the night crystal display device according to the first embodiment of the present invention will now be described. Referring to FIG. 4B, when the light 337 provided by the external light source or the light 334 provided by the light-emitting diode 333 is incident on the light-transmitting plate 33 through the touch receiving surface 33 and the side X surface, such as The bending reflective portion 335 and the pattern 33B reflect light through the liquid crystal display panel 32 to the reflective sheet 3 丨, and finally transmit the light through the liquid crystal display panel 32 and the light transmitting plate 33 to the external environment through the reflective sheet 31 In the eyes of the user, the user can see the displayed effect. Second embodiment: The liquid crystal display device according to the second embodiment of the present invention will be described below. According to the present invention, the difference between the first embodiment and the second embodiment lies in the second embodiment. The embodiments are plural The convex members replace the plurality of patterns 33β in the first embodiment. Referring to FIG. 3, FIG. 3 is a side sectional view showing a liquid crystal display device according to a second embodiment of the present invention. As shown in Fig. 3, the liquid crystal display device according to the second embodiment of the present invention has a reflective sheet 3 for reflecting light inside the liquid crystal display device. The liquid crystal display panel 32 has a first setting surface 32A and a second setting surface 32B provided on the above-mentioned reflective sheet 3 丨, and the structure thereof is a conventionally known liquid crystal display panel structure, and details are not described herein to avoid obscuring the present invention. feature.

For the structure of the light transmitting plate 33, please refer to FIG. 5A and FIG. 5B. The 5A TW2316 (050325) CRF 12 1236560 shows the top of the light transmitting plate 33 of the liquid crystal display device according to the second embodiment of the present invention. view. Fig. 5B is a side cross-sectional view showing the light transmitting plate 33 of the liquid crystal display device according to the second embodiment of the present invention. According to the second embodiment of the present invention, the light-transmitting plate 33 is used to refract and reflect light provided by an external light source or an internal light source. The material is acrylic, and the joint surface 3 3 1 is disposed on the first of the liquid crystal display panel 32. On the two setting surfaces 32B, referring to FIG. 5A, a touch receiving surface 330 is formed on the upper surface of the light-transmitting plate 33. The touch receiving surface 330 has a contact detection circuit 33A for performing corresponding actions according to external contact. The circuit structure is different according to the sensing method of the touch receiving surface 330, such as resistive, capacitive, infrared, ultrasonic, etc., but this is well known to those skilled in the art, and will not be described in detail here. Streamlined description. Furthermore, a light source, such as a plurality of light emitting diodes 333, is additionally provided on the side surface 332 of the light transmitting plate 33 to provide the light of the internal light source described above. In addition, a curved reflecting portion 33 5 is provided on the other side 336 opposite to the side 332 to reflect the light emitted by the light emitting diode 333 to prevent the light from escaping to the external environment and increasing the demand for light intensity. It is particularly noted that the above-mentioned light-emitting diode 333 is not limited to being disposed on the side surface 332, and therefore, the designer may place the light-emitting diode 333 on the other side of the light-transmitting plate 33 according to the actual situation, and set the above-mentioned bending reflection light accordingly. The part 335 is used for improving the display effect.乂 In addition, the touch receiving surface 330 further has a plurality of convex members 43β, and the convex surface of the above-mentioned convex member 43B faces the bottom of the light transmitting plate 33, which can change the reflection direction of the light inside the light transmitting plate so that the light can be transmitted through. The bottom of the light plate 33 travels to improve the utilization efficiency of light. The principle of its configuration is as follows: The convex member 43B located near the touch receiving surface M 'and closer to the light emitting diode 333 has a smaller convex surface and a larger interval between the convex members; otherwise, the distance is engraved.啜 The convex member ′ of the ninety-one polar body 333 is farther away, the convex surface is larger, and the interval between the convex members is smaller. The reason lies in the distance

TW2316 (050325) CRF 13 1236560 Where the light source is relatively backward, its light intensity is weak, so it needs a larger convex surface and a denser ^ convex member to increase the amount of reflected light; similarly, the closer to the light source, Its light intensity is strong, so only a small convex surface and a sparse convex member are required to reduce the amount of reflected light, so that the amount of light reflected to the liquid crystal display panel 32 is not affected by the distance. Regarding the arrangement of the above patterns, the convex area and distance of the convex member can be adjusted appropriately according to the actual situation. In addition, according to the second embodiment of the present invention, an external light source detection circuit 33C may be provided on the touch receiving surface 33. The external light source detection circuit 33C may be used to detect the brightness of the external light source. In the case of brightness, the above-mentioned light-emitting diode additionally provides the light of the internal light source to enhance the display effect, and the above-mentioned definition of the specific brightness may be a brightness that is sufficient for human eyes to clearly identify the display of the liquid crystal display device. In this way, the light-emitting diode 333 does not need to be maintained in the light-emitting state from time to time, and can only emit light when the external light source is insufficient, which makes the use of power more flexible. The operation principle of the liquid crystal display device according to the second embodiment of the present invention will now be described. Referring to FIG. 5B, when the light 337 provided by the external light source or the light 334 provided by the light emitting diode 333 is incident on the light transmitting plate 33 through the touch receiving surface 330 and the side surface 332, the light reflecting portion will be bent. 335 and convex member 43B etc. transmit the light to the reflective sheet 31 through the liquid crystal display panel 32, and finally transmit the light to the eyes of the user in the external environment through the liquid crystal display panel 32 and the light transmitting plate 33 through the reflective sheet 31 'Enables the user to see the effect displayed. In summary, according to the above-mentioned embodiment of the present invention, the touch-sensitive panel and the light guide plate in the conventional liquid crystal display device with a touch-sensitive panel are integrated into the light-transmitting plate described above, so that it has a conventional touch-type The functions of the panel and the light guide plate make it unnecessary for the liquid crystal display device according to the embodiment of the present invention to have both the touch panel and the light guide plate structure. As described above, the thickness of the conventional light guide plate and the touch panel is about 1.5 cm to 3 cm. Therefore, the combination of the present invention can effectively reduce the thickness of the liquid crystal display device by TW2316 (050325) CRF 14 1236560. Furthermore, according to the above embodiments of the present invention, an internal light source is additionally provided in the reflective liquid crystal display device, so that the reflective liquid crystal display device according to the present invention can continue to be used in the absence of an external light source, which solves the traditional reflection Type LCD ", clothing set must be used in the environment with a light source to display the problem. In addition, the light source used in the embodiment of the present invention is to replace the traditional cold cathode light emitting tube with a light emitting diode, because the power required for the light emitting diode to emit light is lower than that of the A cathode light emitting tube. For example, the power required for a general cold-cathode light-emitting tube to emit light is about 2W, and the rated operating current of a general light-emitting diode is M, and the rated operating voltage is 2.1V. Therefore, the power required for a single-emitting triode to emit light is 0. G1W. Considering that the brightness of the light-emitting diode is relatively low, even if 10 light-emitting diodes are used as a means for providing an internal light source in the embodiment of the present invention, only 0.1W of power is required, which shows that the embodiment of the present invention has significantly reduced Liquid crystal display device ^ internal light source power requirements. In this way, the liquid crystal display device can be used in an environment where the light source is covered, and the requirements for power saving can be taken into account. Although the present invention is disclosed as above with a preferred embodiment, it is not intended to limit the present invention. It is not intended to limit 'any person skilled in the art' without departing from the spirit and scope of the present invention. The scope of protection shall be determined by the scope of the patent application attached to Shenyan.

TW2316 (050325) CRF 15 1236560 [Brief description of the drawings] Figure 1 shows a schematic cross-sectional view of a conventional liquid crystal display device with a touch panel. FIG. 2A is a side view of the light guide plate 13. FIG. 2B is a top view of the light guide plate 13.

Fig. 3 is a side sectional view showing a liquid crystal display device according to a first embodiment of the present invention. X FIG. 4A is a top view showing a transparent plate 33 for a liquid crystal display device according to the first embodiment of the present invention. Fig. 4B of the clothing 1 is a side cross-sectional view showing a light transmitting plate 33 of a liquid crystal according to the first embodiment of the present invention. Display device

FIG. 5A is a top view showing the liquid crystal transparent plate 33 according to the first embodiment of the present invention. Decorate

Fig. 5B is a side sectional view showing a light-transmitting plate 33 for a liquid crystal according to a second embodiment of the present invention. [Description of main component symbols] 11 ~ Reflective plate 11A ~ Reflective surface 12 ~ Liquid crystal display panel 13 ~ Light guide plate 13 A ~ Top surface 131 ~ Pattern 132 ~ 134 ~ Light 135 ~ Convex member 14 ~ Touch panel

TW2316 (050325) CRF 16 ♦ 1236560 31 ~ Reflector 32 ~ LCD display panel 32A ~ First setting surface 32B ~ Second setting surface 33 ~ Translucent plate 330 ~ Touch receiving surface 33A ~ Contact detection circuit 33B ~ Pattern 33C ~ External light source detection circuit 331 ~ Joint surface 3 3 2 ~ Side surface 333 ~ Light emitting diode 3 3 4 ~ Light 335 ~ Bending reflector 3 3 6 ~ Side 337 ~ Light 43B ~ Convex member 17

TW2316 (050325) CRF

Claims (1)

Revised and replaced ^ | 4 years < month \ fork 1236560 10. Scope of patent application: 1 · A liquid crystal display device, comprising: a reflective sheet to reflect a predetermined light; a liquid crystal display panel having the above-mentioned reflective light A first setting surface and a second setting surface of the sheet; a light-transmitting plate for refracting and reflecting the predetermined light, the light-transmitting plate having a joint surface disposed on the second arrangement surface and opposite to the joint surface The touch receiving surface is provided. The touch receiving mask has a contact detection circuit for performing corresponding actions according to external contact. 2. The liquid crystal display device described in item i of the patent application range, wherein the light-transmitting plate further has a first side for setting a light-emitting diode to provide the above-mentioned predetermined light. 3. The liquid crystal display device according to item 2 of the scope of patent application, wherein the light-transmitting plate further has a "bending reflection part", which is disposed opposite to the surface to reflect the predetermined light. Brother-side 4. The liquid crystal display device according to item 1 of the scope of patent application, wherein the predetermined light is provided by an external light source. 5. The liquid crystal display device according to item 1 of the scope of patent application, wherein the predetermined light is provided by at least one of an external light source and the light-emitting diode. 6 · The liquid crystal display device as described in item (2) of the stated patent scope, wherein the touch surface and the receiving surface further have an external light source detection circuit to side the external light source, when the brightness of the external light source is lower than a specific level For brightness, the predetermined light source is provided by the light-emitting diode. 7. The m display farm as described in item 1 of the scope of the patent application, wherein the touch control receiving surface further has a plurality of patterns, and the subtractive pattern has a granular surface facing the liquid crystal display panel. / TW2316 (050325) CRF 18 1236560 8 · If the patent application covers the light plate, the material is glass. The liquid crystal display device according to item 7, wherein the liquid crystal display device according to item 1 of the scope of patent application, wherein the touch receiving surface further has a plurality of convex members, and Y 10 is provided toward the liquid crystal display panel. The liquid crystal display device according to item 9 of the scope of the patent application, wherein the material of the light-transmitting plate is acrylic. ^ 11 · A liquid crystal display device comprising: a reflective sheet for reflecting a light; a liquid crystal display panel formed on the reflective sheet; a light transmitting plate formed on the liquid crystal display panel for refracting and Reflecting the light, the light-transmitting plate further includes: a light source on a first side to provide the light; a bent portion on a second side opposite to the first side to reflect the light; a touch The control receiving surface is located on the upper surface of the light transmitting plate, and the touch receiving mask has a contact detection circuit for performing corresponding actions according to external contact. 12 · The liquid crystal display device according to item 11 of the scope of patent application, wherein the light source includes at least one light emitting diode. 13 · The liquid crystal display device described in item 11 of the scope of patent application, further includes an external light source detection circuit for detecting the brightness of the light. When the exemption of the light is lower than a specific brightness, the light source is determined by the light source. Provide the above light. 1 4 · The liquid crystal display device according to item 11 of the scope of patent application, wherein the touch receiving surface further has a plurality of patterns, and the plurality of patterns have a grain surface and are arranged facing the liquid crystal display panel. 1 5 · The liquid crystal display device described in item 14 of the scope of patent application, wherein the material of the light-transmitting plate described in TW2316 (050325) CRF 19 1236560 is glass. 16. The liquid crystal display device according to item 范围 of the scope of patent application, wherein the touch receiving surface further has a plurality of convex members, and is disposed toward the liquid crystal display panel. 17 · The liquid crystal display device according to item 16 of the scope of patent application, wherein the material of the light transmitting plate is acrylic. TW2316 (050325) CRF 20