JP2008146393A - Card with image display function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a card with an image display function on which an LCD panel whose strength is excellent is mounted. <P>SOLUTION: This card with an image display function is provided with a central control part for controlling all the operations including data transmission/reception processing with external equipment; a liquid crystal cell for displaying necessary information on the basis of an instruction from the central control part; and a power source part for supplying a power to each card section. The liquid crystal cell is formed by adhering a second glass board G2 exposed to a user with a first glass board G1 which is not exposed to the user with whole thickness of 0.60 mm or less, and the side face of the outer circumference of the second glass board G2 is physically cut and separated, and a physically cut serrated line formed at the circumference edge of the first glass board G1 is smoothed by etching processing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an IC card having an image display function, and more particularly to an IC card in which a display element such as a liquid crystal cell or an organic EL having excellent strength is used.

The IC card has an advantage that it has not only a large memory capacity but also an arithmetic processing function compared to a magnetic card or the like. However, the contents stored in the memory cannot be visually confirmed, and this is a major problem, and development of an IC card with an image display function is underway (Patent Document 1).
JP 2003-270657 A

  In the present invention, a liquid crystal cell using a plastic substrate instead of a glass substrate has been proposed in consideration of bending deformation of the card.

  However, plastics are inferior to glass in terms of chemical resistance and heat resistance, and in particular, are much inferior in heat resistance compared to glass, so they are thermally deformed during the manufacturing process, and wiring terminals and the like cannot be finely arranged. There is a problem. In particular, a liquid crystal cell mounted on an IC card must have a wiring pattern and internal elements that are extremely small in size. Therefore, as long as a plastic substrate is used, a commercial liquid crystal cell cannot be realized.

  Therefore, it is strongly desired to complete a glass substrate that realizes a display element such as a liquid crystal cell and an organic EL that is resistant to bending deformation while taking advantage of glass. Specifically, a glass substrate of a display element that does not easily break even when the liquid crystal screen is pushed with a finger or an IC card is bent is strongly desired.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an IC card on which a display element that is not easily damaged by a pressing force or bending deformation is mounted.

  In order to solve the above-described problem, the invention according to claim 1 is necessary based on a central control unit that comprehensively controls all operations including data transmission / reception processing with an external device, and instructions from the central control unit A display element for displaying various information and a power supply unit for supplying power to each part of the card, the card having an image display function, wherein the display element is exposed to the user and the first glass plate exposed to the user. The second glass plate is not laminated, and the overall thickness is reduced to 0.60 mm or less by mechanical or chemical treatment for the laminated glass plate that includes a plurality of display element regions and is laminated. It is separated and completed.

  Here, the mechanical or chemical treatment includes any of chemical treatment alone, physical treatment alone, and a combination of chemical treatment and physical treatment. The chemical treatment is typically a thinning treatment using a polishing liquid containing hydrofluoric acid. In the present invention, the thickness of the entire glass plate is reduced to 0.6 mm or less by chemical or mechanical treatment, but is preferably reduced to 0.4 mm or less. Note that the image display function includes not only a photograph and a picture but also a function of displaying letters and numbers as described in the embodiments.

  In the present invention, both the first glass plate and the second glass plate are thinned by mechanical or chemical treatment, so that the crack that becomes the base point of the crack can be eliminated in the etching process of the glass, and the external pressure It is possible to realize a display element such as a liquid crystal cell or an organic EL which is hard to break.

  Here, preferably, after the laminated glass plate is thinned and separated into individual elements, the peripheral edge surface of the display element is etched within a range not exceeding 60 μm. In this case, since the peripheral end face where cracks are most likely to occur can be made smooth by etching, the strength can be further increased. In addition, it has been confirmed by the inventor's research that the strength does not change even when etching is performed exceeding 60 μm.

  According to a fourth aspect of the present invention, there is provided a central control unit that comprehensively controls all operations including data transmission / reception processing with an external device, and a display that displays necessary information based on instructions from the central control unit. An image display function-equipped card comprising an element and a power supply unit that supplies power to each part of the card, wherein the display element is exposed to a user, and a first glass plate that is not exposed to the user And the peripheral edge of the second glass plate is physically cut and separated while the peripheral edge of the first glass plate is there. The formed physical cutting score line is smoothed by an etching process. Also in this invention, the thickness of the whole glass plate is preferably 0.4 mm or less.

  In the present invention, since the periphery of the first glass plate is smoothed by the etching process, there is no crack serving as a base point of the crack on the periphery of the first glass plate. Therefore, even if bending force acts from the direction of the 2nd glass plate exposed to a user, the 1st glass plate which receives a tension | tensile_strength is hard to break.

  The invention according to claim 5 is a central control unit that controls all operations including data transmission / reception processing with an external device, and a display that displays necessary information based on instructions from the central control unit. An image display function-equipped card comprising an element and a power supply unit that supplies power to each part of the card, wherein the display element is exposed to a user, and a first glass plate that is not exposed to the user The entire thickness of the laminated glass is 0.60 mm or less, and the peripheral edges of the second glass plate and the first glass plate are smoothed by an etching process using physical cutting lines formed therein. Has been. The total thickness of the glass plate is preferably 0.4 mm or less.

  In this invention, since the periphery of the 1st glass plate and the 2nd glass plate is smoothed by the etching process, the crack used as the origin of a crack does not exist in the periphery of any glass plate. Therefore, even if a bending force acts from any direction, the glass plate is difficult to break.

The liquid crystal cell of each of the above inventions has a four-point bending strength by a test method based on JIS R 1601 (Fine ceramic bending strength test method), preferably 120 MPa or more, and more preferably 140 MPa or more. Note that the bending strength σ is calculated from σ = 3P (L−1) / (2Wt ² ), assuming that the laminated glass plate having a thickness t is a single member. In the above equation, P is the maximum load, L is the distance between the fulcrums, l is the distance between the fulcrums (load side), W is the width of the test piece, and t is the thickness of the test piece.

  Here, in the case of the invention described in claim 4, the stress is applied from the second glass plate exposed to the user toward the first glass plate not exposed to the user, and measurement is performed. On the other hand, in the display element of Claim 3 and Claim 5, said intensity | strength is realizable even if it measures from which direction.

  In any of the above inventions, each of the first glass plate and the second glass plate has a thickness of 0.10 mm or less, and has a four-point bending strength of 4000 MPa or more according to a test method based on JIS R 1601. Preferably there is. In this test, since the first and second glass plates are separated and measured with individual glass plates, each glass plate can be freely bent and exhibits a large four-point bending strength.

  The display element having the above-mentioned characteristics is a first glass plate and a second glass plate that form a first scribe line on the surface of the first glass plate with respect to a laminated glass plate containing a plurality of display element regions. A second step of bringing an etching solution into contact with the first scribe line; and a second scribe line corresponding to the first scribe line on the surface of the second glass plate of the bonded glass plate that has undergone the second step. For the laminated glass plate, applying a stress from the second glass plate exposed to the user toward the first glass plate not exposed to the user, along the scribe line It is preferable to manufacture by the manufacturing process which performs the 4th process of cut-separating a bonding glass plate in this order.

  In this case, the outer surface of the first glass plate and the second glass plate is subjected to liquid phase etching, so that the arithmetic average roughness (Ra) of the surface of the glass plate is 0.005 μm or less and the maximum surface roughness (Rmax). Is easily suppressed to 0.06 μm or less. The glass plate may be aluminosilicate glass or borosilicate glass, and includes aluminoborosilicate glass. Any glass plate having this composition may be any of alkali glass, low alkali glass and non-alkali glass.

  Preferably, after the fourth step, a fifth step of bringing the etching solution into contact with only the peripheral edges of the first glass plate and the second glass plate should be provided. In this case, even if a crack exists on the peripheral side surface of the glass plate, it disappears, so that the strength of the laminated glass plate is increased. Note that the etching amount is preferably 10 μm to 60 μm, and the strength does not increase even if etching of 60 μm or more is performed.

  According to the invention configured as described above, a display element that employs a flexible glass substrate that is resistant to bending deformation can be realized. Therefore, even if bending stress is applied, a card that is prevented from being damaged is realized. be able to.

  Hereinafter, the present invention will be described in more detail based on examples. FIG. 1 is an external view of an IC card according to the first embodiment. Here, a contact IC card used as a credit card is illustrated.

  As shown in FIG. 1, the IC card CR of this embodiment is configured by disposing an IC module MO on the upper left side of the card and a liquid crystal cell LCD on the right side of the card. Since the IC card CR is a contact type, a connection terminal portion TM is formed on the upper surface of the IC module MO. The reason why the liquid crystal cell LCD is arranged at a position other than the center position is to make it difficult to affect the liquid crystal cell LCD even when a force in the bending direction is applied to both ends of the IC card CR.

  FIG. 2 is a block diagram showing the internal configuration of the IC card CR. The IC card CR includes a connection terminal portion TM that is brought into contact with the connection terminal of the card reader / writer RW at the time of use, a power storage unit PW that supplies a DC voltage supplied from the card reader / writer RW to each unit and stores the power, and a CPU And an IC module MO including a memory, a liquid crystal driving unit CT that performs a drawing operation under the control of the IC module MO, and a liquid crystal cell LCD that displays contents of a nonvolatile memory (ROM: Read Only Member) of the IC module MO It consists of For the power storage unit PW, an electric double layer capacitor having excellent power storage capacity per unit volume is used among capacitors having excellent charge characteristics in a short time.

  The IC card CR having the above configuration is attached to a card reader / writer RW arranged in a store or the like at the time of card settlement. Then, the DC power supply voltage is supplied from the card reader / writer RW to the IC card CR through the connection terminal portion TM, and the face of the cardholder is displayed on the liquid crystal cell LCD based on the data stored in the nonvolatile memory. The Therefore, the store side that is going to settle the payment fee with the IC card can surely confirm the identity.

  In parallel with this display operation, the card reader / writer RW reads the data of the memory (EEPROM: Electronically Erasable and Programmable Read Only Memory) of the IC module MO through the connection terminal portion TM and settles the charge. Is written from the card reader / writer RW to the memory (EEPROM) of the IC module MO. The balance is displayed on the liquid crystal cell LCD together with the current usage amount.

  Even after the IC card CR is taken out from the card reader / writer RW, the display operation of the liquid crystal cell LCD is maintained by the DC voltage stored in the power storage unit PW. Can be confirmed.

  Although the IC card CR according to the first embodiment has been described above, the present invention is not necessarily limited to the configuration shown in FIGS. 3 and 4 are an external view and an internal configuration diagram showing a non-contact type IC card which is the IC card of the second embodiment and does not require the connection terminal portion TM. The IC card CR includes an operation unit WH arranged at the lower left portion of the card and an antenna AN built in the upper portion of the card. Further, as shown in FIG. 4, by disposing the solar battery PW on the card, the display operation can be performed even when separated from the card reader / writer RW.

  Note that data transmission / reception between the card reader / writer RW and the IC module MO is performed via the antenna AN and the modem unit TR. That is, the settlement of the trading value is executed through a wireless line, and the amount after the settlement is written in the memory (EEPROM) of the IC module MO and also displayed on the liquid crystal cell LCD.

  The operation unit WH is an input device that includes a large number of touch sensors arranged in an annular shape and is also called a scroll wheel. The user's instructions can be transmitted by pressing either the top, bottom, left, or right of the touch sensor arranged on the circumference, or by tracing the circumference of the touch sensor clockwise or counterclockwise with a finger. It has become. Therefore, the cardholder can check the balance and usage history of the IC card after turning on the power by an appropriate manual operation. In addition, even when the user is asked to confirm his / her identity prior to the settlement of the fee, his / her photo can be displayed and shown on the store side.

  As yet another embodiment, an IC card CR without a battery can be used. FIG. 5 shows an IC card according to the third embodiment, which eliminates the need for a built-in battery by realizing a power feeding operation through a wireless line. That is, by bringing the IC card CR close to the card reader / writer RW, the IC card CR is electromagnetically coupled to the card reader / writer RW. The high frequency electromagnetic wave transmitted from the card reader / writer RW to the antenna unit is converted into a DC voltage in the rectifying unit PW1 via the resonance circuit, and then this DC voltage is stored in the power storage unit PW2. The stored DC voltage is used as a power supply voltage for each part. Note that the supply operation from the card reader / writer RW to the IC card CR is continued during the following data transmission / reception process.

  Therefore, the IC module MO that has received the power feeding operation can transmit necessary information to the card reader / writer RW via the antenna unit AN. On the other hand, the card reader / writer RW returns the information after the settlement to the IC module MO after the settlement. Therefore, also in the third embodiment, the amount after settlement is written in the memory (EEPROM) of the IC module MO and displayed on the liquid crystal cell LCD.

  By the way, each of the above embodiments has a great feature in that a liquid crystal cell is mounted on the IC card CR. However, the IC card CR is usually stored in a wallet or the like and then stored in a back pocket of trousers or the like. Therefore, there is a strong possibility that a pressing force is applied to the surface of the IC card or a force in the bending direction is received.

  Therefore, a liquid crystal cell that is not easily damaged by such an external force is manufactured by the following procedure. Fig.6 (a) is a manufacturing process flowchart until it cuts and separates the bonding glass plate 1 by the 1st glass plate G1 and the 2nd glass plate G2 which have a some liquid crystal cell area | region. Here, the laminated glass plate composed of the second glass plate G2 exposed to the user and the first glass plate G1 not exposed to the user is thinned to the target plate thickness value T, and an appropriate one is used. A cut cut groove having a depth is formed. The target plate thickness value T is appropriately set in the range of 0.1 to 0.60 mm depending on the type of IC card.

  This manufacturing method includes an etching step (ST1) for chemically polishing a laminated glass plate to the nearest target thickness value, and a first scribe line that is a cutting score line on the surface of the first glass plate G1 that is not exposed to the user. A first scribe step (ST2) for forming the second scribe line, and an additional etching step (ST3) for bringing the etching solution into contact with the first scribe line, and a second scribe line for forming a predetermined second scribe line on the surface of the second glass plate G2. A step (ST4), a cutting and separating step (ST5) for applying a stress to the scribe lines formed on the surfaces of the first glass plate and the second glass plate to cut and separate the laminated glass plate, and a finish etching step (ST6) ) In order.

  8A and 8B are diagrams illustrating a laminated glass plate 1 to be cut and separated, in which FIG. 8A is a plan view and FIG. 8B is a schematic cross-sectional view taken along line AA in FIG. 8A. . The laminated glass plate 1 is a laminate of a second glass plate G2 that is exposed to the user and serves as an image display surface of a liquid crystal panel, and a first glass plate G1 that serves as a back plate of the image display surface. is there.

  A thin film transistor and a transparent electrode are formed on the surface of the first glass plate G1 facing the second glass plate G2, and an alignment film is further laminated (not shown). On the other hand, in the second glass plate G2 serving as an image display surface, a color filter is formed by being divided into a black matrix on the surface facing the first glass plate G1, and an overcoat, a transparent electrode, and an alignment film are sequentially laminated. (Not shown). The glass plates G1 and G2 are bonded together by interposing a spacer (not shown), the partition resin 3 and the outer peripheral resin 7 between the glass plates G1 and G2. In addition, a polarizing plate is affixed on the outer surface of the laminated glass plate 1 after a finish etching process (ST6).

  A liquid crystal sealing region 2 is interposed between the glass plates G1 and G2. The liquid crystal sealing region 2 is partitioned by providing a partition resin 3 when the glass plates G1 and G2 are bonded. In addition, the outer peripheral resin 7 surrounding all the liquid crystal sealing regions 2 is provided to form a sealed space that prevents the intrusion of the etching solution.

  Next, the manufacturing method of an Example is demonstrated, referring FIG. 7A shows the first scribe process (ST2), FIG. 7B shows the additional etching process (ST3), FIG. 7C shows the second scribe process (ST4), and FIG. The cutting / separating step (ST5) and FIG. 7 (e) show the finish etching step (ST6).

  Prior to the first scribing step (ST2), an etching step (ST1) is provided, and the laminated glass plate 1 is etched to a position close to the target value T to a thickness of T + δ. Here, the etching deficiency value δ is less than 200 μm, preferably 20 to 120 μm, more preferably 20 to 80 μm, as a whole of the laminated glass plate 1. Therefore, the etching deficiency value is less than 100 μm, preferably 10 to 60 μm, and more preferably 10 to 40 μm, ignoring the gap between the glass plates G1 and G2 when converted to each glass plate G1 and G2.

  Thereafter, in the first scribe step (ST2), as shown in FIG. 7A, a scribe line 5a having a depth of about 10 to 15% of the plate thickness is formed on the surface of the first glass plate G1. . The scribe line 5a is made of diamond or a cemented carbide alloy and is formed by the peripheral surface of the disc-shaped hole cutter 4 having a pointed peripheral surface. The scribe line 5 a is for dividing each liquid crystal sealing region 2 and is formed between the adjacent liquid crystal sealing regions 2. This scribe line (cut cutting line) 5a grows into a cutting cut groove by the etching process, and becomes a cutting line of the glass plate G1 in the cutting separation step ST5.

  In the additional etching step (ST3) shown in FIG. 7B, the etching solution is brought into contact with the outer surface of the laminated glass plate 1 and then washed with water to remove the etching solution from the surface of the laminated glass plate 1. The contact with the etching solution is performed by etching the surfaces of the glass plates G1 and G2 including the scribe line 5a. Etching in this step is performed by immersing the laminated glass plate 1 in an etching solution. The etching solution is not particularly limited as long as it is a glass-soluble liquid, but an aqueous solution containing hydrogen fluoride at a concentration of 55% or less is used.

  In this additional etching step, the glass plates G1 and G2 are etched and thinned by an etching deficiency value δ (in other words, an additional etching amount). Therefore, this additional etching surely removes the cracks on the surface of the glass plate G1 generated when the scribe line 5a is formed. However, since the etching amount is limited, the cut groove formed from the scribe line 5a is not completely smoothed.

  In the second scribe step (ST4) following the additional etching step (ST3), as shown in FIG. 7 (c), the cutting line of the glass plate G2 in the cutting and separating step (ST5) is formed on the surface of the second glass plate G2. A second scribe line 5b is formed. The second scribe line 5 b is formed at a position corresponding to the first scribe line 5 a and is formed between the display areas 2 adjacent to each other by the wheel cutter 4.

  Thus, in this cutting and separating method, the scribe line 5b is formed on the second glass plate G2 for the first time in the second scribe step (ST4). That is, since the scribe line 5b that is the starting point of the glass breakage is not formed on the second glass plate G2 until this stage, the etching process (ST3) up to the second scribe process (ST4) or bonding is performed. In the conveyance process of the glass plate 1, the second glass plate G2 functions as a mechanical reinforcing plate for the first glass plate G1.

  In the cutting and separating step (ST5), as shown in FIG. 7D, the laminated glass plate 1 is cut and separated using the scribe lines 5a and 5b as cutting lines. In this step, stress is applied to the scribe lines 5a and 5b by the load, and the laminated glass plate 1 is cut and separated along the scribe lines 5a and 5b by the stress. Since the scribe line 5a grows into a cut cut groove from which cracks have been removed by the etching process, the cut surface of the glass plate G1 after cutting and separation is smoother than the cut surface of the glass plate G2.

  The load for cutting and separating is applied from the second glass plate G2 provided with the second scribe line 5b toward the first glass plate G1. In addition, you may apply a load toward the 2nd glass plate G2 from the 1st glass plate G1 after that as needed. In any case, the laminated glass plate 1 is separated along the scribe lines 5a and 5b.

  The laminated glass plate 1 cut | disconnected through the above each process is used as a liquid crystal cell. In this liquid crystal cell, since the cut surface of the first glass plate G1 is a smooth surface, breakage is reliably suppressed even when a load is applied from the outside. Accordingly, a polarizing film may be attached to the liquid crystal cell at this stage, but in order to further increase the strength, the process is finally shifted to the finish etching step (ST7).

  In the finish etching step (ST7), as shown in FIG. 7E, the front and back surfaces excluding the peripheral side surfaces of the first glass plate G1 and the second glass plate G2 are covered with a hydrofluoric acid-resistant masking material MS. This masking process may be performed by screen printing or a sheet-like masking material MS may be adhered. Further, the peripheral edges of the first glass plate G1 and the second glass plate G2 are also sealed with a hydrofluoric acid resistant sealing material SE. The masking process may be performed prior to the cutting and separating step (ST5). In this case, the masking process is performed so as not to cover the scribe lines 5a and 5b.

  In any case, after the cutting and separating step, only the peripheral side surface is etched by bringing the etching solution into contact with the peripheral side surfaces of the first glass plate G1 and the second glass plate G2 (ST6). It is effective to immerse the laminated glass plate 1 in an etching solution tank. The etching amount is sufficient to be less than 60 μm, and the strength does not increase even if etching is performed beyond that.

  When the above etching process is completed, the masking material is peeled off and then the polarizing film is attached.

By the way, when the liquid crystal cell after the finish etching step was subjected to a four-point bending test by a test method based on JIS R 1601, it was confirmed that the four-point bending strength σ calculated by the following formula was 140 MPa or more. . 4-point bending strength σ = 3P (L−l) / (2Wt ² ) where P is the maximum load, L is the distance between the fulcrums, l is the distance between the fulcrums, W is the width of the test piece, and t is the thickness of the test piece. It is.

  In the above formula, when the thickness of the liquid crystal cell is 0.6 mm, the four-point bending strength of a plurality of samples in the same process was 138 to 264 MPa. Further, when the plate thickness was 0.3 mm, it was 142 to 304 MPa, and better results were obtained when the plate thickness was thinner. When the plate thickness is 1.0 mm, the result is inferior to the result of the plate thickness of 0.6 mm (128 to 239 MPa).

  When the pasted glass plate 1 before the transition to the finish etching step (ST5) is measured by applying stress from the second glass plate exposed to the user toward the first glass plate not exposed to the user. The same strength was confirmed.

  Moreover, when the 1st glass plate and 2nd glass plate which comprise a bonding glass substrate are isolate | separated into each glass plate and measured, it is based on the test method based on JISR1601 about a 0.1 mm glass plate. As a result of the 4-point bending test, a 4-point bending strength of about 4000 to 7000 MPa was confirmed. In addition, it is considered that the strength of the individual glass plates is increased because there is no member that prevents bending unlike the laminated glass plates.

  As described above, according to the above-described embodiment, a liquid crystal cell that is not easily damaged by a pressing force or bending deformation can be manufactured. Therefore, even if it is mounted on an IC card, it is sufficiently practical. Needless to say, the specific description is not particularly intended to limit the present invention, and various design changes are possible. For example, it can be applied to an organic EL using a glass substrate instead of the liquid crystal cell, and the same performance has been confirmed.

  In the above embodiment, the laminated glass plate 1 provided with the scribe lines 5a and 5b is thinned by etching, but the laminated glass plate 1 may be thinned without providing the scribe lines 5a and 5b. . In such a case, the thinned laminated glass plate 1 is physically divided to cut out individual liquid crystal cells, but the first glass plate G1 and the second glass plate G2 are respectively etched. As a result, the cracks on the outer surface are removed, and the bending strength can be improved.

  In this case, when the plate thickness of the liquid crystal cell was 0.6 mm, the four-point bending strength σ was 97 to 117 MPa for a plurality of samples in the same process. When the plate thickness was 0.3 mm, it was 75 to 114 MPa. In addition, in the case of plate thickness 1.0mm, the result (68-103MPa) inferior to the result of plate thickness 0.6mm is confirmed.

  In such an embodiment, in order to further improve the bending strength, only the peripheral edge surface of the liquid crystal cell may be etched to be a smooth surface as in FIG. In this case, it is sufficient that the etching amount is less than 60 μm, and it was confirmed that the four-point bending strength σ is improved to 140 MPa or more in the liquid crystal cell in which the peripheral end face is smoothened.

  Of course, the present invention can be applied to railway commuter pass, driver's license, Basic Resident Register, etc. according to the use of the IC card. It can also be used as a multi-function card depending on the amount of data stored in the memory.

It is an external view of the IC card of the first embodiment. It is an internal block diagram of the IC card of FIG. It is an external view of the IC card of the second embodiment. It is an internal block diagram of the IC card of FIG. It is an internal block diagram of the IC card of a 3rd Example. It is process drawing which shows a part of manufacturing process of a liquid crystal cell. It is a schematic diagram explaining the manufacturing process of a liquid crystal cell. It is a schematic diagram explaining the structure of a bonding glass plate.

Explanation of symbols

RW External device MO Central control unit LCD Liquid crystal cell PW Power supply unit CR Card with image display function G2 Second glass plate G1 First glass plate

Claims (9)

A central control unit that comprehensively controls all operations including data transmission / reception processing with an external device, a display element that displays necessary information based on instructions from the central control unit, and power supply to each unit of the card A card with an image display function comprising a power supply unit,
The display element is mechanical or chemical for a laminated glass plate in which a first glass plate exposed to a user and a second glass plate not exposed to a user are bonded together including a plurality of display element regions. The card with an image display function, wherein the overall thickness is reduced to 0.60 mm or less by a typical process and then separated and completed.   The card with an image display function according to claim 1, wherein the card is thinned using a polishing liquid containing hydrofluoric acid.   3. The image display function according to claim 1, wherein the display element is etched in a range in which a peripheral edge surface does not exceed 60 μm after the laminated glass plate is thinned and separated into individual elements. card. A central control unit that comprehensively controls all operations including data transmission / reception processing with an external device, a display element that displays necessary information based on instructions from the central control unit, and power supply to each unit of the card A card with an image display function comprising a power supply unit,
The display element has a total thickness of 0.60 mm or less obtained by bonding the second glass plate exposed to the user and the first glass plate not exposed to the user,
While the peripheral edge of the second glass plate, the side surface is physically cut and separated,
The card with an image display function, wherein the peripheral edge of the first glass plate has a physical cut line formed thereon smoothed by an etching process. A central control unit that comprehensively controls all operations including data transmission / reception processing with an external device, a display element that displays necessary information based on instructions from the central control unit, and power supply to each unit of the card A card with an image display function comprising a power supply unit,
The display element has a total thickness of 0.60 mm or less obtained by bonding the second glass plate exposed to the user and the first glass plate not exposed to the user,
A card with an image display function, wherein the peripheral edges of the second glass plate and the first glass plate have a physical cut line formed thereon smoothed by an etching process. The display element is
About the laminated glass plate in which the first glass plate and the second glass plate contain a plurality of display element regions,
A first step of forming a first scribe line on the surface of the first glass plate;
A second step of bringing the etching solution into contact with the first scribe line;
A third step of forming a second scribe line corresponding to the first scribe line on the surface of the second glass plate of the bonded glass plate that has undergone the second step;
About the said laminated glass plate, stress is applied toward the 1st glass plate which is not exposed to a user from the 2nd glass plate exposed to a user, and the said laminated glass plate is cut-separated along the said scribe line. The card with an image display function according to claim 4, further comprising a manufacturing process in which the fourth process is executed in this order.   The card with an image display function according to claim 6, further comprising a fifth step of bringing only the peripheral edges of the first glass plate and the second glass plate into contact with the etching solution after the fourth step.   When the display element is measured by applying stress from the second glass plate exposed to the user toward the first glass plate not exposed to the user, the four-point bending strength according to a test method based on JIS R 1601 is measured. The card with an image display function according to claim 4 or 5, wherein the thickness is 120 MPa or more.   The first glass plate and the second glass plate each have a thickness of 0.10 mm or less, and a four-point bending strength according to a test method based on JIS R 1601 is 4000 MPa or more. A card with an image display function according to any one of the above.

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