TW527553B - Touch panel LCD with piezoelectric transducer - Google Patents

Abstract

A touch panel LCD with piezoelectric transducer comprises a first frame, a liquid crystal panel, back-light panel, multiple piezoelectric transducers, a second frame and multiple fixed components enclosed with a spring. Such piezoelectric transducer is installed between the liquid crystal panel bottom and back-light panel and is in touch with the liquid crystal panel; each piezoelectric transducer is connected with a signal line; the liquid crystal panel and back-light panel are installed between the first frame and the second frame and the first frame and the second frame are bonded with those fixed components. When user applies proper force to contact somewhere on liquid crystal panel, the panel generate slight deflection in accordance with the contact position of panel and each piezoelectric transducer beneath the liquid crystal panel senses different pressure in terms of the contacted position to generate different signal to a processor, and the system again targets at the received signal to calculate the position being contacted by user.

Description

527553 V. Description of the invention (1) 5-1 Field of the invention The present invention relates to a liquid crystal ^ touched on a touch panel, which enters a display screen, and in particular, has. 5-2 Background of the Invention:

== Bei: The touch panels of the screen are placed on the display (normally resistive) and capacitive touch panels. Set the touch panel to V, which is reduced due to the relationship of the touch panel; no :: =; color = display feature, which greatly improves the original display effect. tJ ήι is a kind of conventional touch panel with a piezoelectric transducer, which is glued to the four corners of a transparent 4S, the signal line and the transparent plate are fixed, and the fixing device with a spring is used to place the sensor and the middle of the transparent plate at the outer frame. Due to the fixed f of the spring, a slight deflection is maintained. Use, volume deflection, and touch. If the piezoelectric sensor is applied to a liquid crystal display screen, the piezoelectric image tube assembly will press four pressures using a frame to press these outside the front of the glass tube and the front of the glass tube. The frame, package and image tube are fixed to the image fixing device so that the outside of the front end of the image tube can pass through the transparent plate and pass through the fast to generate a signal. This will be because an electric sensor and an electric sensor screen are added outside the display area. Method for generating and installing the rear frame of a tube and a transparent bright board. Transparent board '527553 V. Description of the invention (2) The display characteristics such as brightness and color of the liquid crystal display screen are reduced. In this way, the transparent board becomes a liquid crystal module (LCM) is one of the costs, and different materials and forms of transparent plates not only have different costs, but also affect the display effect. If the industry wants to reduce the loss of display characteristics, it is bound to spend more money on improving this transparent plate Or spend the cost to improve the display characteristics, such as improving the luminous efficiency of the backlight panel and the lamp tube. According to the above, in view of the Disadvantages of the front end of the display area of a liquid crystal display, the present inventor provides an improved touch panel liquid crystal display with a piezoelectric sensor. 5-3 Purpose and Summary of the Invention: Because of the above background of the invention, the conventional There are still many shortcomings in the application of the control panel to the liquid crystal display. The present inventor has devoted himself to the improvement of a touch panel liquid crystal display device with a piezoelectric sensor, and the invention has been produced. The main purpose of the present invention is to provide a piezoelectric sensor with a piezoelectric sensor. The touch panel type liquid crystal display uses a liquid crystal panel as a touch panel, and a plurality of piezoelectric sensors are placed under the liquid crystal panel and a backlight plate. By touching the liquid crystal panel, the piezoelectric The sensor feels pressure and generates a signal. Since the LCD panel is used as a touch panel, it will not

527553 527553 V. Description of the invention (4) It is fixed on the second frame. When the user touches the LCD panel somewhere with a proper force, the panel will slightly deflect due to the different positions it touches. Each piezoelectric sensor located below the LCD panel will experience different pressures due to different touch positions. , And generate different signals to a processing system, and the system calculates the position touched by the user for the different signals received. The purpose and many advantages of the present invention will become apparent from the following detailed description of the preferred embodiments and with reference to the accompanying drawings. Explaining the detailed example, the application entity is better than 4 1 5, ο the diagram of the liquid crystal display of the solid crystal case, the solid surface body control device is better than the device, and it is clear that this electrical compression tool has one The first Mingfa edition includes its cover 2, 1 N) y 6 body out of 2 frame display boards, one side of the C back, one side. Week, 4 shapes ο 3 orders 2 bodies, 1 plate, frame and surface 2 6 crystals 1 liquid 1 frame 1 and outside, 8 1 2 2, 1 device 4 somatosensory 1 frame transmission frame 1 electric pressure one by one Edged with perimeter ο shaped 2 steps of this surface, intergranular fluid of this 6 ο 00 00 frame 1 outer hole Yutong 4 1 through the frame through the inner one where there is a peripheral edge-shaped edge step 4 Transparent 1 2nd body frame and 1st 1st pair, surface 4 series 2 2 plate 2 transparent 2 transparent 1st 2nd, 2 glass 2 transparent glass 1 transparent transparent 1 for the first plate The perimeter of the back of the smooth surface is the shape of the 4th pair of 2nd-order panels. The 4th is the decent transparent frame. The 4th is the 2nd and the 2nd. The edge of the plate is transparent and transparent through the second order on Monday. Number 6 and 2 2,

Page 7 527553 V. Description of the invention (5) Surrounding area and area of backlight board 26. The liquid crystal panel 20 can be fixed in the first frame body 12 by a plurality of L-shaped bumps (not shown) or any other appropriately shaped components, and prevent the liquid crystal panel 20 from moving sideways, or by A plurality of L-shaped bumps (not shown) or any other suitably shaped components are fixed on the backlight plate 26. A rubber washer (not shown) may be installed between the first frame body 12 and the liquid crystal panel 20 to prevent the first frame body 12 from scratching the liquid crystal panel 20. Referring to the second figure, a piezoelectric transducer 2 8 is provided at each corner of one side of the backlight plate 26 facing the second transparent plate 24 of the liquid crystal panel 20, and a signal is connected to the piezoelectric sensor 2 8 The wire 3 2 is adhered to one corner of the backlight plate 26 by a tab (TAB) 30 and is in contact with the liquid crystal panel 20. The contact end with the liquid crystal panel may be dome-shaped or other Any suitable shape to maintain point contact with the LCD panel. The second frame body 34 may be a groove with a bottom plate 36 or a thin sheet metal frame, and a plurality of openings may be formed on the bottom plate 36 according to actual needs. The area of the inner frame of the second frame 34 is larger than the area of the backlight plate 26, for the backlight plate 26 to be installed in the inner frame of the second frame 34, and then fixed by a plurality of fixing members. The first frame 12 is fixed to the second frame by a fixing component 40 through the through holes 18 at the four corners of the first frame 12 and the openings 38 at the four corners of the second frame 34, respectively. 3 4 on. Referring to the third and fourth figures, the fixing assembly 40 includes a screw

527553 V. Description of the invention (6) 4 2. A coil spring 5 0, 2 an ear piece 5 2 with a threaded hole, and 2 a nut 5 4. The screw 42 has a first threaded end 44, a second threaded end 46 and an intermediate rod body 48. The diameters of the first threaded end 44 and the second threaded end 46 are smaller than the inner diameter of the threaded hole of the ear piece 5 2 and the nut 54, and the inner diameter of the coil spring 50 is larger than the diameter of the screw rod body 48. , And its outer diameter is greater than the inner diameter of the threaded hole of the ear piece 52, and the outer diameter of this ear piece 52 is greater than the inner diameter of the threaded hole of the nut 54. Thereby, the spring coil 50 is inserted into the screw rod body 48, and the first threaded end portion 4 4 and the second threaded end portion 4 6 of the screw 4 2 are screwed with the ear piece 5 2 and the nut 54 respectively in this order. The ear pieces 52 at both ends of the screw rod 42 are used to fix the coil spring 50 at a symmetrical position relative to the screw rod 48. The coil spring 50 keeps the liquid crystal panel 20 and the first frame body 12 slightly deflected relative to the second frame body and the backlight plate. When the user touches the LCD panel 20 somewhere with an appropriate force, the LCD panel 20 will have a slight deflection due to the different positions it touches. At this time, the backlight panel 2 6 is located below the second transparent panel 24 of the LCD panel. The four-corner piezoelectric sensor 28 will generate different signals to a processing system due to different contact positions and different pressures. At this time, the system calculates the user's contact position for the different signals received. In another specific embodiment of the present invention, a piezoelectric sensor is adhered to each corner of a second transparent plate of the liquid crystal panel facing one side of the backlight plate through a tab, and the piezoelectric sensor and the backlight plate The contact end may be dome-shaped or any other suitable shape to keep the piezoelectric sensor and the backlight plate

527553 V. Description of the invention (7) Point contact. In summary, the present invention has the following advantages: 1. Save material costs. If a touch panel with a piezoelectric sensor of a general image tube is applied to a liquid crystal display, a transparent plate is added above the display area. The invention replaces the function of the transparent panel by taking advantage of the flatness of the liquid crystal panel, so the cost of the transparent panel can be eliminated. 2. Avoid loss of display effect. Because the design of the present invention does not add a transparent plate at the front end of the display area, there is no loss of display effect due to the addition of a transparent plate. This advantage makes it unnecessary for the manufacturer to consider the cost increase caused by the reduction of the display effect. For example, if the cost of improving the luminous efficiency of the backlight is increased, it is not necessary to consider the material selection of the transparent plate. The above are only specific embodiments of the present invention, and are not intended to limit the scope of patent application for the present invention; all other equivalent changes or modifications made without departing from the spirit disclosed by the present invention should be included in the following Within the scope of patent application.

Page 527553 Brief description of the diagram The first diagram is an exploded perspective view of a preferred embodiment of the present invention; the second diagram is a perspective perspective view of a backlight panel in the preferred embodiment of the first diagram, wherein the backlight Each corner of the board is provided with a piezoelectric sensor; the third figure is a plan view of the screw of the fixed component in the preferred embodiment of the first figure; and the fourth figure is the fixed component in the preferred embodiment of the first figure The combined structure is not intended. Main symbols: 1 0 Touch panel LCD with piezoelectric sensor 1 2 Frame 1 4 Inner frame 1 6 Outer frame 1 8 Through hole 2 0 Liquid crystal panel 2 2 First transparent plate 2 4 Second Transparent board 2 6 Backlight board 2 8 Piezoelectric sensor 3 0 Splice 3 2 Signal cable

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Claims (1)

527553 VI. Application for patent scope 1. A touch panel liquid crystal display with a piezoelectric sensor, which at least includes: a first frame body having an inner frame and an outer frame, and a stepped peripheral edge, the stepped peripheral edge Is located between the inner frame and the outer frame, the stepped periphery is provided with a plurality of through holes; a liquid crystal panel having a first transparent plate and a second transparent plate, the first transparent plate is facing A stepped periphery of the first frame, and the area of the first transparent plate is smaller than the area of the second transparent plate, and the area of the second transparent plate is smaller than the area surrounded by the stepped periphery of the first frame; a backlight plate, The top surface of the backlight plate faces one surface of the second transparent plate of the liquid crystal panel, and its area is larger than that of the second transparent plate; a plurality of piezoelectric sensors, each of which is connected to a signal line 9 a second frame The body is a groove with a bottom plate, the peripheral edge of the bottom plate is provided with a plurality of through holes aligned with the through holes on the stepped peripheral edge of the first frame body, and the inner frame area of the second frame body Larger than the area of the backlight The backlight board is installed in the second frame body; and a plurality of fixing components, the first frame body is fixed in the second frame body through the through holes of the first frame body and the second frame body respectively. On the frame; wherein the piezoelectric sensors are disposed between the peripheral edge below the second transparent plate of the liquid crystal panel and the peripheral edge of the top surface of the backlight plate, and the liquid crystal panel and the backlight plate are disposed on the first frame body and Between the second frame. · 2. If the liquid crystal display of item 1 of the patent application scope, wherein the first 527553 6. Scope of patent application The stepped periphery of the frame body is provided with a plurality of L-shaped bumps for fixing the liquid crystal panel in the first frame body. For several weeks, the top of the compound surface is described on the back of the board. The number of items on the display is attached to the wafer with liquid crystals. The number of items is 1 loan. The description of each of the 3 conditions is as follows: the top circle shows a three-sided crystal contact liquid on the junction board, which is the crystal contact liquid. Fan Qili and the special device please feel the power of the application. The liquid crystals on the board are described above. Shows the number of face items attached to the wafer around the edge of the chip. One 1 ^ complex number is borrowed by the board. It is a sharp weapon. The special sense is to pass on the application board, such as 5 sheets of glass. In the shape of 〇, the top circle shows a 5 plate first light enclosure with a crystal contact, and Fan Qili and the special device, please feel that Shen Chuan Rudian 6 volts complex description on the middle device. 显 显 晶Liquid of. The first one is the fourth and the third is Wei Shao to the sharp weapon. Please pass on the application of electricity. Press the edge of each 8 and describe the top of the middle surface. The plate light shows the sticky piece of crystal attached to the liquid. 7 Connected to the first round, Fan Lili is a special device, please feel that the application is passed. • The voltage display device displays the crystal liquid item. 7th. Fan Li special, please apply as 9. Each of the above is on page 14. 527553 6. Scope of patent application The piezoelectric sensor is adhered to a side corner of the second transparent plate of the liquid crystal panel facing one side of the backlight plate through a tab. 10. The liquid crystal display according to item 1 of the scope of patent application, wherein a plurality of L-shaped bumps are provided on a peripheral edge of the top surface of the above-mentioned backlight plate for fixing the liquid crystal panel to the backlight plate. 1 1. The liquid crystal display according to item 1 of the scope of patent application, wherein a rubber gasket is provided between the first frame body and the liquid crystal panel. 1 2. The liquid crystal display according to item 1 of the scope of patent application, wherein each of the above fixing components includes at least: a screw having a first threaded end, an intermediate rod body, and a second threaded end; Coil spring; two ear pieces with a threaded hole, the diameter of the threaded hole of the ear piece is larger than the diameter of the first threaded end and the second threaded end of the screw, and the diameter of the threaded hole of the ear piece is smaller than that of the coil spring Outer diameter; and two nuts, the diameter of the screw hole of the nut is larger than the diameter of the first thread end and the second thread end of the screw, but smaller than the outer diameter of the ear piece; wherein the coil spring is sleeved on On the screw, and the first thread end and the second thread end of the screw are screwed with an ear piece and a nut, respectively, and the ear piece is used for fixing the coil spring in a symmetrical position relative to the screw .