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Monday, May 26, 2014

Samsung's Smart Refrigerator

I've recently been reminded about smart refrigerators; fridges that can do more than just refrigerate. I think we are a long way off from any smart refrigerators but you can buy some that are marketed as being smart. I have cherry picked a couple of Samsung smart fridges to talk about: 30 cu. ft. Side by Side Refrigerator and 8" LCD Digital Display with Apps (Manual) and 28 cu. ft. 4-Door Refrigerator with 8" Wi-Fi Enabled LCD and Counter-Height FlexZone™ Drawer (Manual). They include an 8" (tablet) screen that runs Android and comes with several built-in apps. Let's quickly gloss over these built-in apps:
  • Grocery Manager: Lets you manage food items by location, storage date, and expiration date.
    • Allows you to create an inventory of food that is in the fridge, limited to 70 items from 15 different categories. Not as useful as it sounds because you have to manually manage the whole inventory; nothing is automated.
  • Memo: Lets you create, save, or check memos.
    • Digital Post-it notes? Somewhat useful when the LCD hasn't automatically switched off, otherwise SMS instead.
  • Pandora: Plays music provided by the Pandora Internet radio service.
    • I'm betting that the sound quality is going to be awful (couldn't find any specs on the speakers).
  • Epicurious: Lets you view recipes and create shopping lists for the recipes you select.
    • Does not integrate with the built-in grocery management app. Assuming you can read the recipes off the small 8" screen, you would have to turn around to face the fridge to go to the next step. Oh, by the way, "There will be a 4-second commercial when you start Epicurious."
  • Kitchen Phone: Connect to your smartphone using the Samsung Smart Home app and make or receive phone calls.
    • Requires a (recent high-end) Samsung smartphone connected to the same Wi-Fi network. Useless feature if your natural reaction is to use your phone to call, rather than your fridge. Just bring your phone with you into the kitchen.
  • Mirroring: Access the smartphone screen on the refrigerator, and control or change the settings on the phone.
    • This will expand the functionality of the fridge's screen, but just use your phone. Your phone has a higher resolution and will only display in portrait mode on the tablet's landscape screen. Plus, how long are you willing to stand in front of your fridge (while people are opening and closing its doors)? If you don't want people mucking around with your phone, you have to remember to disconnect it from the fridge.
  • Kitchen TV: Connect your Samsung TV to the same network as the refrigerator and watch TV on the refrigerator’s screen.
    • Requires a (recent high-end) Samsung TV connected to the same Wi-Fi network. Just watch TV on your expensive Samsung TV. You'll get better picture and sound quality, and you won't have to touch the fridge every time you want to change channels during those ad breaks.
  • AP News: Displays the news from one of 11 categories you select.
    • Actually, "The news article on the preview page shows the first 2 lines of the entire article. To view the article in detail, visit http://www.ap.org on your mobile phone or PC."
  • Twitter: Displays Twitter messages.
    • Not useful because you can only read tweets and log in from one user account. Would you want your all your family members or flatmates to read your tweets?
  • WeatherBug: Displays the current weather and weather forecast.
    • Not useful, because "There will be a 4-second commercial ad when you start WeatherBug."
  • Calendar: Lets you view the schedule you stored in Google Calendar.
    • Probably the second useful app. You can view your personal and shared Google calendars. You can create events, but "You cannot modify or erase the Google Calendar schedule through the refrigerator display screen" seems like a fatal flaw; How do you correct mistakes in a (newly created) event?
  • Photo: Lets you manage stored photos and import photos from external devices such as memory cards.
    • This might be useful if you like digital photo frames.
  • Phone Finder: Use Phone Finder to find a misplaced smartphone that has the Samsung Smart Home app installed and is connected to the same network as the refrigerator.
    • All it does is ring your lost phone. "The Ringing screen appears and the smartphone rings or beeps for 1 minute. Follow the sound to find the phone." You can easily ring your lost phone yourself or go to http://findmymobile.samsung.com
  • Settings: Lets you set the refrigerator’s basic functions such as Energy Saver, Door Alarm, Time, etc.
    • Probably the first useful app because it is the only way you can customise the refrigeration of your food.
The tagline at the front of the product manual is, "imagine the possibilities." So, without further ado, here are some possibilities that I can imagine but Samsung haven't:
  • The fridge does not automatically recognise the food that it contains: The user has to manually add/remove the groceries they take in/out of the fridge using the built-in grocery manager. Wouldn't it be useful if this could be automatically?
  • A maximum of 70 grocery items from 15 different food categories can be recorded by the grocery manager: It can't record how much of each grocery item is left. Wouldn't it be useful if the fridge could automatically track the amount of groceries left? What about creating virtual partitions within the fridge and allowing people to tag their food so that they don't get confused other other people's (e.g., flatmates) foods?
  • The fridge has no forward-facing camera: Wouldn't it be useful if the fridge could automatically recognise the grocery items you put in and and take out so that the user doesn't have to? Wouldn't it be useful if the fridge could understand the expiry dates printed on the items so that the user doesn't have to manually enter it in? The fridge can use photos of the groceries to display exactly what's inside the fridge. 
  • The fridge doesn't create a list of grocery items that are running low and doesn't do online supermarket shopping: Wouldn't it be useful if the fridge could automatically populate an online supermarket cart with the items that are running low and from the user's custom shopping lists?
  • The included recipe app does not work with the grocery manager to tell the user if they have all the ingredients needed to make the meal: It can create a shopping list of all the ingredients you need but will not take away the ingredients that you already have in your fridge.
  • The tablet software can be updated but there is no way for the user to install additional apps: There is also no internet browser so the user is limited to the functionalities provided by the built-in apps. What if the user is using the recipe app but encounters an ingredient they haven't heard of? Where should they go to find additional information? Certainly not the fridge.
  • The fridge has no ambient light sensor to detect the brightness of the room that it is in: Wouldn't it be nice if the fridge could automatically set a sensible brightness for the tablet's screen and for the lights inside the fridge? No one wants to be blinded in the middle of the night when they go for a snack.
  • The tablet only has an 8" touch screen with no ability to change its viewing angle: The tablet hasn't been designed for the consumption of media. You will have to be at arms length to use the media apps (excluding the photo app). If you sit down, you'll have to be able to reach up to touch the screen. I cannot see people standing in front of their immobile fridge consuming food and media.

Wednesday, May 21, 2014

Mink: Printing makeup

Mink, a "3D printer for makeup", received a fair bit of media coverage and positive feedback after it was presented at Disrupt NY. Apparently, Mink will use inkjet printer technology to produce makeup with custom colours. Mink is expected to be the size of a Mac Mini when it is sold to consumers (13 - 21 year old girls). Grace Choi is the sole founder and only employee of Mink (TechCrunch interview). Her pitch at Disrupt NY was cringe-worthy, especially during the question and answer section. She had a rather condescending way of presenting her idea and choose some very poor words. There are better ways of describing the large margins that large cosmetic companies put on their products without calling it "bullshit". Let's also not mention her lack of spell checking when she had "convieniance" on her slide. However, let's focus on the technical issues with Mink:

Colour Reproduction

Printing the exact colours you see on a computer screen is extremely difficult. In fact, some colours cannot be printed at all! As an analogy, let's talk about the colours you see on a computer screen and the colours you see on a piece of paper produced by an inkjet printer:
  1. Colours on a piece of paper are reflected into your eyes, while colours on a computer screen are emitted/illuminated into your eyes;
  2. Related to the first point, printers use subtractive CMYK ink to create colour, while computer screens use additive RGB subpixels to create colour;
  3. Printers create the illusion of a wide range of colours by ejecting microscopic droplets of CMYK ink onto the paper and can vary the density of the droplets to produce different colours or intensities. Computer screens create the illusion of a wide range of colours by changing the intensity of each RGB subpixel; the density of the pixels is fixed because of the way the screens are manufactured.
  4. Related to the third point, the colours seen on a page are affected greatly by ambient lighting. Colours look darker in dim light, but brighter in bright light. The colours are also affected by the colour of the actual paper; i.e., how white the paper is. The colours seen on a computer screen are also affected greatly by ambient lighting, plus the contrast, brightness and temperature settings of the screen. The colours are also affected by the technology of the screen and how the RGB subpixels are arranged.


The makeup colours you see on a computer screen may not be the makeup colours you get from the Mink printer - this breaks the convenience of the WYSIWYG (What You See Is What You Get) paradigm. Moreover, when you are printing the colours onto (into?) the makeup base (e.g., powder, foundation, creme, or lipstick), you need to physically mix the base colours that are ejected from the printer, otherwise you will get spots of CMYK. I cannot find any information about how Mink will create its range of colours as it is closely guarded secret (patent pending).

3D Printing

The idea of 3D printing is to create 3D objects that can hold their shape. I think Mink is using "3D printing" solely as a buzzword for marketing purposes. It is unnecessary to use a 3D printer to print the makeup. In fact, if you only need to add colour to the makeup substrates, then I think it is faster and easier to make makeup without using a 3D printer. All you really need is a colour mixer; custom colours is the only selling point of Mink anyway.

For example, for lipstick, isn't it easier to set the lipstick in a mould rather than using half an hour to print the lipstick one layer at a time? How do you "3D print" cremes and foundation when they cannot even keep their shape? How do you "3D print" powders without creating a cloud of dust and doesn't the powder need to be pressed before it can be picked up and placed into a case?

As Grace concedes to the investors during her pitch, the Mink demo was rigged. It did not print any makeup. This leads me to a few questions: Does she have a working prototype? How long does Mink take to print makeup? How noisy is Mink when it is printing makeup? Her target audience of 13 to 21 year old girls are not the ones to wait hours for their custom makeup to print; they want it printed in an instant! I cannot find the technical specs of Mink and judging by the way Grace answered one of the investor's technical question, I don't think she knows what the technical specs either.

At one point, Grace said that other types of makeup can be printed by using different "chips", such as a lipstick "chip", creme "chip" or a foundation "chip". I think her notion of a "chip" would be like the Gameboy cartridges that store different games, but this is unnecessary. You just need to write software (e.g., a firmware or a driver) for Mink that can instruct it to print lipstick, creme, foundation, and whatever else.


You just need a colour mixer that can mix precise amounts of base colours into the makeup substrates. By the way, saying that the idea will be patented doesn't mean the idea will actually work. Here's a patent for a Time Machine and a patent for a Teleportation Device.


Maintaining Mink so that it prints makeup perfectly without contamination is going to be difficult for Mink's target audience (13 to 21 year old girls) to achieve. If you allow Mink to print a range of makeups, then Mink will have to be able to flush out the residue of the previous makeup. This includes flushing out the colours and makeup substrate; challenging if the substrate contains oil. I imagine an integral part of Mink will have to be taken out by the user to be washed out or replaced. Mink will also need to think about how it will handle wet (e.g., lipstick and creme) and dry (e.g., powder) makeup substrates in the same machine. In traditional inkjet printers, clogged inkjet nozzles affect the quality of the colour reproduction. Mink users will have to make sure the ink does not dry up and clog the (microscopic) nozzles.


Mink will be difficult to clean.

Last Thoughts

I'm reminded of the wonderful idea of the €299 Hövding invisible helmet. As their FAQ states, "If your Hövding has been in an accident, it can’t be used again." The idea of Mink might sound nice, but coming up with a practical product is a separate issue.